fix(rofi): migrate Home Manager options

Imported as a linear vendor commit so forge rebases do not replay the upstream root tree.

git-subtree-dir: third_party/pi

git-subtree-split: 71023aec1546d6d677a65669c5665c0927ce0dd0

.agents

@@ -0,0 +1 @@
+.pi

.pi/extensions/herdr-agent-state.ts

@@ -1,287 +0,0 @@
-// installed by herdr
-// managed by herdr; reinstalling or updating the integration overwrites this file.
-// add custom hooks/plugins beside this file instead of editing it.
-// HERDR_INTEGRATION_ID=pi
-// HERDR_INTEGRATION_VERSION=6
-// @ts-nocheck
-
-import net from "node:net";
-
-const HERDR_ENV = process.env.HERDR_ENV;
-const socketPath = process.env.HERDR_SOCKET_PATH;
-const socketEndpoint =
-  process.platform === "win32" && socketPath ? `\\\\.\\pipe\\${socketPath}` : socketPath;
-const paneId = process.env.HERDR_PANE_ID;
-const source = "herdr:pi";
-
-function enabled() {
-  return HERDR_ENV === "1" && !!socketPath && !!paneId;
-}
-
-function sendRequestAttempt(request: unknown, timeoutMs: number): Promise<boolean> {
-  if (!enabled()) {
-    return Promise.resolve(true);
-  }
-
-  return new Promise((resolve) => {
-    let done = false;
-    let timeout: ReturnType<typeof setTimeout> | undefined;
-    const finish = (delivered: boolean) => {
-      if (done) return;
-      done = true;
-      if (timeout) {
-        clearTimeout(timeout);
-      }
-      socket.destroy();
-      resolve(delivered);
-    };
-
-    const socket = net.createConnection(socketEndpoint!);
-    socket.on("error", () => finish(false));
-    socket.on("connect", () => socket.write(`${JSON.stringify(request)}\n`));
-    socket.on("data", () => finish(true));
-    socket.on("end", () => finish(false));
-    timeout = setTimeout(() => finish(false), timeoutMs);
-    timeout.unref?.();
-  });
-}
-
-async function sendRequest(request: unknown): Promise<void> {
-  if (await sendRequestAttempt(request, 500)) {
-    return;
-  }
-  await sendRequestAttempt(request, 1500);
-}
-
-type AgentState = "working" | "blocked" | "idle";
-
-type QueuedState = {
-  state: AgentState;
-  message?: string;
-  seq: number;
-};
-
-let reportSeq = Date.now() * 1000;
-let currentAgentSessionId: string | undefined;
-let currentAgentSessionPath: string | undefined;
-
-function nextReportSeq(): number {
-  reportSeq += 1;
-  return reportSeq;
-}
-
-function updateSessionRef(ctx: any): void {
-  try {
-    const file = ctx?.sessionManager?.getSessionFile?.();
-    currentAgentSessionPath =
-      typeof file === "string" && file.startsWith("/") ? file : undefined;
-  } catch {
-    currentAgentSessionPath = undefined;
-  }
-
-  try {
-    const id = ctx?.sessionManager?.getSessionId?.();
-    currentAgentSessionId = typeof id === "string" && id.length > 0 ? id : undefined;
-  } catch {
-    currentAgentSessionId = undefined;
-  }
-}
-
-function withSessionRef(params: Record<string, unknown>): Record<string, unknown> {
-  if (currentAgentSessionPath) {
-    return { ...params, agent_session_path: currentAgentSessionPath };
-  }
-  if (currentAgentSessionId) {
-    return { ...params, agent_session_id: currentAgentSessionId };
-  }
-  return params;
-}
-
-function currentSessionRef(): Record<string, unknown> | undefined {
-  if (currentAgentSessionPath) {
-    return { agent_session_path: currentAgentSessionPath };
-  }
-  if (currentAgentSessionId) {
-    return { agent_session_id: currentAgentSessionId };
-  }
-  return undefined;
-}
-
-function reportSession(sessionStartSource?: string): Promise<void> {
-  const sessionRef = currentSessionRef();
-  if (!sessionRef) {
-    return Promise.resolve();
-  }
-
-  return sendRequest({
-    id: `${source}:session:${Date.now()}:${Math.random().toString(36).slice(2)}`,
-    method: "pane.report_agent_session",
-    params: {
-      pane_id: paneId,
-      source,
-      agent: "pi",
-      seq: nextReportSeq(),
-      session_start_source: sessionStartSource,
-      ...sessionRef,
-    },
-  });
-}
-
-function sendState(state: AgentState, message?: string, seq = nextReportSeq()): Promise<void> {
-  return sendRequest({
-    id: `${source}:${Date.now()}:${Math.random().toString(36).slice(2)}`,
-    method: "pane.report_agent",
-    params: withSessionRef({
-      pane_id: paneId,
-      source,
-      agent: "pi",
-      state,
-      message,
-      seq,
-    }),
-  });
-}
-
-function releaseAgent(): Promise<void> {
-  return sendRequest({
-    id: `${source}:release:${Date.now()}:${Math.random().toString(36).slice(2)}`,
-    method: "pane.release_agent",
-    params: {
-      pane_id: paneId,
-      source,
-      agent: "pi",
-      seq: nextReportSeq(),
-    },
-  });
-}
-
-function shouldReleaseOnSessionShutdown(event: any): boolean {
-  // Pi tears down and rebinds extension runtimes for internal lifecycle actions
-  // such as /reload, /new, /resume, and /fork. Those do not mean the pane's
-  // agent process has exited, and releasing hook authority there can suppress
-  // legitimate reports from the replacement runtime. Only a user/process quit
-  // should release Herdr's full-lifecycle authority.
-  const reason = event?.reason;
-  return reason === "quit";
-}
-
-let sendInFlight = false;
-let queuedState: QueuedState | undefined;
-
-function queueState(state: AgentState, message?: string): void {
-  queuedState = { state, message, seq: nextReportSeq() };
-  if (!sendInFlight) {
-    void drainStateQueue();
-  }
-}
-
-async function drainStateQueue(): Promise<void> {
-  if (sendInFlight) {
-    return;
-  }
-
-  sendInFlight = true;
-  try {
-    while (queuedState) {
-      const next = queuedState;
-      queuedState = undefined;
-      await sendState(next.state, next.message, next.seq);
-    }
-  } finally {
-    sendInFlight = false;
-    if (queuedState) {
-      void drainStateQueue();
-    }
-  }
-}
-
-export default function (pi) {
-  if (!enabled()) {
-    return;
-  }
-
-  let agentActive = false;
-  let blockedCount = 0;
-  let blockedMessage: string | undefined;
-  let lastState: AgentState | undefined;
-  let lastMessage: string | undefined;
-  let rootSession = false;
-
-  function desiredState() {
-    if (blockedCount > 0) {
-      return { state: "blocked" as const, message: blockedMessage };
-    }
-    if (agentActive) {
-      return { state: "working" as const, message: undefined };
-    }
-    return { state: "idle" as const, message: undefined };
-  }
-
-  function publishState(force = false) {
-    const next = desiredState();
-    if (!force && next.state === lastState && next.message === lastMessage) {
-      return;
-    }
-    lastState = next.state;
-    lastMessage = next.message;
-    queueState(next.state, next.message);
-  }
-
-  pi.events.on("herdr:blocked", (data) => {
-    if (!rootSession) {
-      return;
-    }
-    if (!data?.active) {
-      blockedCount = Math.max(0, blockedCount - 1);
-      if (blockedCount === 0) {
-        blockedMessage = undefined;
-      }
-      publishState();
-      return;
-    }
-
-    blockedCount += 1;
-    blockedMessage = data.label;
-    publishState();
-  });
-
-  pi.on("session_start", async (event, ctx) => {
-    if (ctx?.hasUI !== true) {
-      return;
-    }
-    rootSession = true;
-    updateSessionRef(ctx);
-    await reportSession(event?.reason);
-    // A reload can replace this extension mid-run without emitting another agent_start.
-    agentActive = ctx?.isIdle?.() === false;
-    publishState(true);
-  });
-
-  pi.on("agent_start", (_event, ctx) => {
-    if (!rootSession) {
-      return;
-    }
-    updateSessionRef(ctx);
-    void reportSession();
-    agentActive = true;
-    publishState();
-  });
-
-  pi.on("agent_settled", (_event, ctx) => {
-    if (!rootSession || ctx?.isIdle?.() !== true) {
-      return;
-    }
-
-    agentActive = false;
-    publishState();
-  });
-
-  pi.on("session_shutdown", async (event) => {
-    if (!rootSession) {
-      return;
-    }
-    if (shouldReleaseOnSessionShutdown(event)) {
-      await releaseAgent();
-    }
-  });
-}

.pi/prompts/review.md

@@ -0,0 +1,42 @@
+---
+description: Review changes against repository style rules
+argument-hint: "[target]"
+---
+
+Review target: `${ARGUMENTS:-the staged diff}`.
+Audit the target for violations of the repository style rules.
+
+Choose skills from the reviewed files:
+
+- Use the `nix-style` skill for `*.nix` files.
+- Use the `rust-style` skill for `*.rs` files.
+- Use the `build-style` skill for `Cargo.toml` files.
+- Use the `build-style` skill for Bazel `BUILD` files.
+
+If the target includes multiple matching file types, use all matching skills.
+If the target is a diff, choose skills from the changed files.
+Do not use a style skill when no reviewed file matches it.
+
+Report only actionable findings.
+Order findings by severity.
+Do not report preferences unless a loaded rule states them.
+
+Use this format for each finding:
+
+```text
+`code-path:line`
+> `smallest reviewed-code excerpt that shows the violation`
+
+`skill::rule-file:line`: Finding title.
+Summary: why the code breaks the rule
+Fix: suggested fix
+```
+
+Keep the code excerpt to one to three lines when possible.
+Use a longer excerpt only when the violation needs surrounding context.
+Use `...` to omit unrelated lines from a multi-line excerpt.
+Use a style-skill rule citation in the form `skill::rule-file:line`.
+Make the fix direct.
+Do not include alternatives when one fix best follows the cited rule.
+
+It is acceptable to report no findings when the target follows the loaded rules.

.pi/skills/build-style

@@ -0,0 +1 @@
+../../src/skills/style/build

.pi/skills/conventional-commits

@@ -0,0 +1 @@
+../../src/skills/conventional-commits

.pi/skills/craft-skill

@@ -0,0 +1 @@
+../../src/skills/craft-skill

.pi/skills/grill

@@ -0,0 +1 @@
+../../src/skills/grill

.pi/skills/nix-style

@@ -0,0 +1 @@
+../../src/skills/style/nix

.pi/skills/rust-style

@@ -0,0 +1 @@
+../../src/skills/style/rust

.pi/skills/to-document

@@ -0,0 +1 @@
+../../src/skills/to-document

AGENTS.md

@@ -3,7 +3,6 @@
 ## Commit convention
 
 - Use Conventional Commits for all commit messages.
-  Before writing a commit message, read `docs/conventional-commits.md`.
 - Keep commit messages about the Git history, not the forge workflow.
   Include external references only when they are stable context for the change.
 - When writing commit messages, NEVER auto-add your agent name as co-author.
@@ -95,10 +94,33 @@
   committing a top-down rewrite.
 - `rules_rust` `rust_test` targets cannot set both `crate` and `srcs`.
   Use one input style per test target.
+- Rust tests in this monorepo live in separate `*_test.rs` files, not inline `#[cfg(test)]` modules.
+- `rnix::ast::HasEntry::entries()` includes assignments and `inherit` statements.
+  Use `attrpath_values()` when code needs only assignment entries.
+- Ariadne Rust tests are declared in Bazel `BUILD` files; do not add `[[test]]` entries to
+  `src/ariadne/Cargo.toml` unless explicitly requested.
 - In this monorepo, "dotfiles" refers to the dotfiles/NixOS configuration under `src/dotfiles/` and `configs/nixos/`.
 - The flake does not currently define `formatter.x86_64-linux`.
   Do not use `nix fmt` as a validation command until a formatter is added.
+- The `fix` app passes its current directory to Deadnix.
+  Run `nix run .#fix` from the repository root so path exclusions match.
+- Git pathspec searches started in a subdirectory default to that subtree.
+  Use `git -C <repository-root>` or top-anchored pathspecs for repository-wide history searches.
+- A `**/*.nix` Git pathspec does not include Nix files directly in its starting directory.
+  Include both `*.nix` and `**/*.nix`, or use a recursive `*.nix` pathspec, when linting every Nix file.
 - Ariadne extraction must preserve the game-root season prefix for archived source.
   Different game installs can contain compiled scripts with the same internal path.
 - Clew owns Ren'Py extraction, preparation, and compiled-script AST export. Ariadne owns analysis over Clew-produced data.
 - Bazel Python targets require `PYTHON_TOOLCHAIN_ROOT` to point at a Python installation root.
+- When checking whether a package exists in nixpkgs, check both this repository's pinned nixpkgs inputs
+  and the relevant current upstream channel. A package can exist on current `nixos-unstable` while being
+  absent from the pinned revision or from a different branch such as `nixpkgs-unstable`.
+- OMP does not discover project skills from `.pi/skills`.
+  Put skills shared by Pi and OMP under `.agents/skills`, or configure OMP's `skills.customDirectories`.
+- Pi is vendored under `third_party/pi` as a linear vendor import.
+  `pkgs.alexion.pi-coding-agent` packages that source and does not use Nixpkgs Pi.
+  Do not use `git subtree add` or `git subtree pull` for Pi PR branches.
+  Gitea rebases the synthetic upstream root commit without the `third_party/pi` prefix.
+  Preserve `git-subtree-dir` and `git-subtree-split` trailers on Pi vendor commits.
+- The default Pi model for NixOS user configuration is set in `configs/nixos/modules/shell/pi/default.nix`, not in vendored Pi source.
+- The `monorepo` and `status` libraries do not have `README.md` files.

Cargo.lock

@@ -2,14 +2,124 @@
 # It is not intended for manual editing.
 version = 4
 
+[[package]]
+name = "anstream"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "824a212faf96e9acacdbd09febd34438f8f711fb84e09a8916013cd7815ca28d"
+dependencies = [
+ "anstyle",
+ "anstyle-parse",
+ "anstyle-query",
+ "anstyle-wincon",
+ "colorchoice",
+ "is_terminal_polyfill",
+ "utf8parse",
+]
+
+[[package]]
+name = "anstyle"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "940b3a0ca603d1eade50a4846a2afffd5ef57a9feac2c0e2ec2e14f9ead76000"
+
+[[package]]
+name = "anstyle-parse"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "52ce7f38b242319f7cabaa6813055467063ecdc9d355bbb4ce0c68908cd8130e"
+dependencies = [
+ "utf8parse",
+]
+
+[[package]]
+name = "anstyle-query"
+version = "1.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "40c48f72fd53cd289104fc64099abca73db4166ad86ea0b4341abe65af83dadc"
+dependencies = [
+ "windows-sys",
+]
+
+[[package]]
+name = "anstyle-wincon"
+version = "3.0.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "291e6a250ff86cd4a820112fb8898808a366d8f9f58ce16d1f538353ad55747d"
+dependencies = [
+ "anstyle",
+ "once_cell_polyfill",
+ "windows-sys",
+]
+
 [[package]]
 name = "ariadne"
 version = "0.1.0"
 dependencies = [
+ "clap",
+ "monorepo",
  "serde",
  "serde_json",
 ]
 
+[[package]]
+name = "clap"
+version = "4.6.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aa8876b300ab35ba921adea3dfd70157a46249b33f95c9084ae5709785478946"
+dependencies = [
+ "clap_builder",
+ "clap_derive",
+]
+
+[[package]]
+name = "clap_builder"
+version = "4.6.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ec0797fb7aeb1406c84efac526901f7ec3ead2124f946b494e72879d4b54704d"
+dependencies = [
+ "anstream",
+ "anstyle",
+ "clap_lex",
+ "strsim",
+]
+
+[[package]]
+name = "clap_derive"
+version = "4.6.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f9c751b79415d4e559e3d1fcf128e09e720eb673a06d26cf6f392d37d75b66e0"
+dependencies = [
+ "heck",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "clap_lex"
+version = "1.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1c133bc6a41be0d194c306b5506d15e6feeea7b1d6604bd3f8310dfb2ca96486"
+
+[[package]]
+name = "colorchoice"
+version = "1.0.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1d07550c9036bf2ae0c684c4297d503f838287c83c53686d05370d0e139ae570"
+
+[[package]]
+name = "heck"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2304e00983f87ffb38b55b444b5e3b60a884b5d30c0fca7d82fe33449bbe55ea"
+
+[[package]]
+name = "is_terminal_polyfill"
+version = "1.70.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a6cb138bb79a146c1bd460005623e142ef0181e3d0219cb493e02f7d08a35695"
+
 [[package]]
 name = "itoa"
 version = "1.0.18"
@@ -26,6 +136,16 @@ version = "2.8.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cf8baf1c55e62ffcace7a9f06f4bd9cd3f0c4beb022d3b367256b91b87513d98"
 
+[[package]]
+name = "monorepo"
+version = "0.1.0"
+
+[[package]]
+name = "once_cell_polyfill"
+version = "1.70.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "384b8ab6d37215f3c5301a95a4accb5d64aa607f1fcb26a11b5303878451b4fe"
+
 [[package]]
 name = "proc-macro2"
 version = "1.0.107"
@@ -88,10 +208,20 @@ dependencies = [
 ]
 
 [[package]]
-name = "syn"
-version = "3.0.5"
+name = "status"
+version = "0.1.0"
+
+[[package]]
+name = "strsim"
+version = "0.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "12df2e0110f65b775f769bb17ef989067a1d931b2eb822bd4346631eeada89f9"
+checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f"
+
+[[package]]
+name = "syn"
+version = "3.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8593e8e72159ed2257d083c7a454a85cbf854f37a0966d8d483aff8c8a3ebcee"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -100,9 +230,30 @@ dependencies = [
 
 [[package]]
 name = "unicode-ident"
-version = "1.0.24"
+version = "1.0.26"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e6e4313cd5fcd3dad5cafa179702e2b244f760991f45397d14d4ebf38247da75"
+checksum = "d245f478577f809a851594d02313b640fb437e0bb33866753cff937863096954"
+
+[[package]]
+name = "utf8parse"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "06abde3611657adf66d383f00b093d7faecc7fa57071cce2578660c9f1010821"
+
+[[package]]
+name = "windows-link"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f0805222e57f7521d6a62e36fa9163bc891acd422f971defe97d64e70d0a4fe5"
+
+[[package]]
+name = "windows-sys"
+version = "0.61.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ae137229bcbd6cdf0f7b80a31df61766145077ddf49416a728b02cb3921ff3fc"
+dependencies = [
+ "windows-link",
+]
 
 [[package]]
 name = "zmij"

Cargo.toml

@@ -2,5 +2,14 @@
 members = [
     "src/ariadne",
     "src/machoke",
+    "src/monorepo",
+    "src/status",
 ]
 resolver = "3"
+
+[workspace.dependencies]
+clap = "4"
+monorepo = { path = "src/monorepo" }
+serde = "1.0"
+serde_json = "1.0"
+status = { path = "src/status" }

LICENSE

@@ -0,0 +1,251 @@
+Repository license policy
+=========================
+
+Except as noted below, repository-owned content in this monorepo is
+Copyright (C) 2026 Alexion and licensed under the GNU Affero General Public
+License, version 3 or any later version.
+
+Exceptions and exclusions:
+
+- src/skills/ is licensed separately under the MIT license. See
+  src/skills/LICENSE.
+- third_party/ is not covered by this license. Third-party content keeps its
+  upstream license.
+
+The canonical AGPL-3.0 license text follows.
+
+GNU AFFERO GENERAL PUBLIC LICENSE
+Version 3, 19 November 2007
+
+Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+
+Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed.
+
+                            Preamble
+
+The GNU Affero General Public License is a free, copyleft license for software and other kinds of works, specifically designed to ensure cooperation with the community in the case of network server software.
+
+The licenses for most software and other practical works are designed to take away your freedom to share and change the works.  By contrast, our General Public Licenses are intended to guarantee your freedom to share and change all versions of a program--to make sure it remains free software for all its users.
+
+When we speak of free software, we are referring to freedom, not price.  Our General Public Licenses are designed to make sure that you have the freedom to distribute copies of free software (and charge for them if you wish), that you receive source code or can get it if you want it, that you can change the software or use pieces of it in new free programs, and that you know you can do these things.
+
+Developers that use our General Public Licenses protect your rights with two steps: (1) assert copyright on the software, and (2) offer you this License which gives you legal permission to copy, distribute and/or modify the software.
+
+A secondary benefit of defending all users' freedom is that improvements made in alternate versions of the program, if they receive widespread use, become available for other developers to incorporate.  Many developers of free software are heartened and encouraged by the resulting cooperation.  However, in the case of software used on network servers, this result may fail to come about. The GNU General Public License permits making a modified version and letting the public access it on a server without ever releasing its source code to the public.
+
+The GNU Affero General Public License is designed specifically to ensure that, in such cases, the modified source code becomes available to the community.  It requires the operator of a network server to provide the source code of the modified version running there to the users of that server.  Therefore, public use of a modified version, on a publicly accessible server, gives the public access to the source code of the modified version.
+
+An older license, called the Affero General Public License and published by Affero, was designed to accomplish similar goals.  This is a different license, not a version of the Affero GPL, but Affero has released a new version of the Affero GPL which permits relicensing under this license.
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+The precise terms and conditions for copying, distribution and modification follow.
+
+                       TERMS AND CONDITIONS
+
+0. Definitions.
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+
+"Copyright" also means copyright-like laws that apply to other kinds of works, such as semiconductor masks.
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+
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+You may convey a covered work in object code form under the terms of sections 4 and 5, provided that you also convey the machine-readable Corresponding Source under the terms of this License, in one of these ways:
+
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+
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+
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+
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+
+7. Additional Terms.
+"Additional permissions" are terms that supplement the terms of this License by making exceptions from one or more of its conditions. Additional permissions that are applicable to the entire Program shall be treated as though they were included in this License, to the extent that they are valid under applicable law.  If additional permissions apply only to part of the Program, that part may be used separately under those permissions, but the entire Program remains governed by this License without regard to the additional permissions.
+
+When you convey a copy of a covered work, you may at your option remove any additional permissions from that copy, or from any part of it.  (Additional permissions may be written to require their own removal in certain cases when you modify the work.)  You may place additional permissions on material, added by you to a covered work, for which you have or can give appropriate copyright permission.
+
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+
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+
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+
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+
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+
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+All other non-permissive additional terms are considered "further restrictions" within the meaning of section 10.  If the Program as you received it, or any part of it, contains a notice stating that it is governed by this License along with a term that is a further restriction, you may remove that term.  If a license document contains a further restriction but permits relicensing or conveying under this License, you may add to a covered work material governed by the terms of that license document, provided that the further restriction does not survive such relicensing or conveying.
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+8. Termination.
+
+You may not propagate or modify a covered work except as expressly provided under this License.  Any attempt otherwise to propagate or modify it is void, and will automatically terminate your rights under this License (including any patent licenses granted under the third paragraph of section 11).
+
+However, if you cease all violation of this License, then your license from a particular copyright holder is reinstated (a) provisionally, unless and until the copyright holder explicitly and finally terminates your license, and (b) permanently, if the copyright holder fails to notify you of the violation by some reasonable means prior to 60 days after the cessation.
+
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+
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+
+9. Acceptance Not Required for Having Copies.
+
+You are not required to accept this License in order to receive or run a copy of the Program.  Ancillary propagation of a covered work occurring solely as a consequence of using peer-to-peer transmission to receive a copy likewise does not require acceptance.  However, nothing other than this License grants you permission to propagate or modify any covered work.  These actions infringe copyright if you do not accept this License.  Therefore, by modifying or propagating a covered work, you indicate your acceptance of this License to do so.
+
+10. Automatic Licensing of Downstream Recipients.
+
+Each time you convey a covered work, the recipient automatically receives a license from the original licensors, to run, modify and propagate that work, subject to this License.  You are not responsible for enforcing compliance by third parties with this License.
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+
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+
+11. Patents.
+
+A "contributor" is a copyright holder who authorizes use under this License of the Program or a work on which the Program is based.  The work thus licensed is called the contributor's "contributor version".
+
+A contributor's "essential patent claims" are all patent claims owned or controlled by the contributor, whether already acquired or hereafter acquired, that would be infringed by some manner, permitted by this License, of making, using, or selling its contributor version, but do not include claims that would be infringed only as a consequence of further modification of the contributor version.  For purposes of this definition, "control" includes the right to grant patent sublicenses in a manner consistent with the requirements of this License.
+
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+
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+license to downstream recipients.  "Knowingly relying" means you have actual knowledge that, but for the patent license, your conveying the covered work in a country, or your recipient's use of the covered work in a country, would infringe one or more identifiable patents in that country that you have reason to believe are valid.
+
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+
+A patent license is "discriminatory" if it does not include within the scope of its coverage, prohibits the exercise of, or is conditioned on the non-exercise of one or more of the rights that are specifically granted under this License.  You may not convey a covered work if you are a party to an arrangement with a third party that is in the business of distributing software, under which you make payment to the third party based on the extent of your activity of conveying the work, and under which the third party grants, to any of the parties who would receive the covered work from you, a discriminatory patent license (a) in connection with copies of the covered work conveyed by you (or copies made from those copies), or (b) primarily for and in connection with specific products or compilations that contain the covered work, unless you entered into that arrangement, or that patent license was granted, prior to 28 March 2007.
+
+Nothing in this License shall be construed as excluding or limiting any implied license or other defenses to infringement that may otherwise be available to you under applicable patent law.
+
+12. No Surrender of Others' Freedom.
+
+If conditions are imposed on you (whether by court order, agreement or otherwise) that contradict the conditions of this License, they do not excuse you from the conditions of this License.  If you cannot convey a covered work so as to satisfy simultaneously your obligations under this License and any other pertinent obligations, then as a consequence you may
+not convey it at all.  For example, if you agree to terms that obligate you to collect a royalty for further conveying from those to whom you convey the Program, the only way you could satisfy both those terms and this License would be to refrain entirely from conveying the Program.
+
+13. Remote Network Interaction; Use with the GNU General Public License.
+
+Notwithstanding any other provision of this License, if you modify the Program, your modified version must prominently offer all users interacting with it remotely through a computer network (if your version supports such interaction) an opportunity to receive the Corresponding Source of your version by providing access to the Corresponding Source from a network server at no charge, through some standard or customary means of facilitating copying of software.  This Corresponding Source shall include the Corresponding Source for any work covered by version 3 of the GNU General Public License that is incorporated pursuant to the following paragraph.
+
+Notwithstanding any other provision of this License, you have permission to link or combine any covered work with a work licensed under version 3 of the GNU General Public License into a single combined work, and to convey the resulting work.  The terms of this License will continue to apply to the part which is the covered work, but the work with which it is combined will remain governed by version 3 of the GNU General Public License.
+
+14. Revised Versions of this License.
+
+The Free Software Foundation may publish revised and/or new versions of the GNU Affero General Public License from time to time.  Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program specifies that a certain numbered version of the GNU Affero General Public License "or any later version" applies to it, you have the option of following the terms and conditions either of that numbered version or of any later version published by the Free Software Foundation.  If the Program does not specify a version number of the GNU Affero General Public License, you may choose any version ever published by the Free Software Foundation.
+
+If the Program specifies that a proxy can decide which future versions of the GNU Affero General Public License can be used, that proxy's public statement of acceptance of a version permanently authorizes you to choose that version for the Program.
+
+Later license versions may give you additional or different permissions.  However, no additional obligations are imposed on any author or copyright holder as a result of your choosing to follow a later version.
+
+15. Disclaimer of Warranty.
+
+THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+16. Limitation of Liability.
+
+IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+
+17. Interpretation of Sections 15 and 16.
+
+If the disclaimer of warranty and limitation of liability provided above cannot be given local legal effect according to their terms, reviewing courts shall apply local law that most closely approximates an absolute waiver of all civil liability in connection with the Program, unless a warranty or assumption of liability accompanies a copy of the Program in return for a fee.
+
+END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+If you develop a new program, and you want it to be of the greatest possible use to the public, the best way to achieve this is to make it free software which everyone can redistribute and change under these terms.
+
+To do so, attach the following notices to the program.  It is safest to attach them to the start of each source file to most effectively state the exclusion of warranty; and each file should have at least the "copyright" line and a pointer to where the full notice is found.
+
+     <one line to give the program's name and a brief idea of what it does.>
+     Copyright (C) <year>  <name of author>
+
+     This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+
+     This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more details.
+
+     You should have received a copy of the GNU Affero General Public License along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If your software can interact with users remotely through a computer network, you should also make sure that it provides a way for users to get its source.  For example, if your program is a web application, its interface could display a "Source" link that leads users to an archive of the code.  There are many ways you could offer source, and different solutions will be better for different programs; see section 13 for the specific requirements.
+
+You should also get your employer (if you work as a programmer) or school, if any, to sign a "copyright disclaimer" for the program, if necessary. For more information on this, and how to apply and follow the GNU AGPL, see <http://www.gnu.org/licenses/>.

MODULE.bazel

@@ -14,4 +14,5 @@ rust = use_extension("//bazel:rust.bzl", "rust")
 use_repo(rust, "rust")
 
 register_toolchains("@python//:python")
+
 register_toolchains("@rust//:rust")

README.md

@@ -13,7 +13,8 @@ dev/                    Monorepo root
 ├── src/                 Projects
 │   └── dotfiles/        Home and system configuration
 └── third_party/         External source and vendoring support
-    └── crates/          Generated Rust crate sources and Bazel targets
+    ├── crates/          Generated Rust crate sources and Bazel targets
+    └── pi/              Vendored Pi source
 ```
 
 ## Rust dependencies
@@ -44,3 +45,45 @@ deps = ["//third_party/crates:crate_name"]
 Commit the generated files under `third_party/crates/`.
 Do not edit generated files manually.
 
+## Vendored Pi
+
+Pi source lives in `third_party/pi/`.
+The directory is a linear vendor import from upstream Pi.
+Local fork changes are carried directly in that vendored tree.
+
+Use the upstream tag that matches the target CLI release.
+The CLI version lives in `packages/coding-agent/package.json`.
+
+Do not use `git subtree add` or `git subtree pull` for Pi PR branches.
+Those commands create a synthetic upstream root commit.
+Gitea rebase applies that root commit without the `third_party/pi` prefix.
+That causes add/add conflicts on repository root files.
+
+Update the vendor tree with a linear commit:
+
+```sh
+git fetch https://github.com/earendil-works/pi.git refs/tags/v<version>
+split="$(git rev-parse FETCH_HEAD)"
+rm -rf third_party/pi
+mkdir -p third_party/pi
+git archive --format=tar "$split" | tar -C third_party/pi -xf -
+git add third_party/pi
+git commit \
+  -m "chore(vendor): import pi <version>" \
+  -m "Imported as a linear vendor commit so forge rebases do not replay the upstream root tree." \
+  -m "git-subtree-dir: third_party/pi" \
+  -m "git-subtree-split: $split"
+```
+
+Keep the vendor import or update commit separate from local edits.
+Do not remove the `git-subtree-dir` and `git-subtree-split` trailers.
+They record the upstream source commit for future updates.
+
+After the upstream update, resolve conflicts in `third_party/pi/`.
+Keep local fork changes as ordinary commits after the vendor update.
+Then verify the package:
+
+```sh
+nix build .#nixosConfigurations.zeus.config.home-manager.users.alexion.programs.pi-coding-agent.package --no-link --print-out-paths
+```
+

configs/nixos/AGENTS.md

@@ -2,10 +2,10 @@
 
 ## Desktop
 
-- TODO: Verify this path after the NixOS configuration is migrated.
-  When adding a graphical application, add a `window-rewrite` icon mapping in `modules/desktop/session/waybar.nix`.
+- When adding a graphical application, register its workspace icon in `registry.window-icon`.
   The workspace indicator uses this mapping to show an application icon instead of the generic default glyph.
   Match the mapping on the window class.
+  Store the icon as the rendered string.
   Run `hyprctl clients -j | jq -r '.[].class' | sort -u` to list classes in the running session.
 - TODO: Verify this path after the NixOS configuration is migrated.
   Set Hyprland session environment variables in `modules/desktop/session/hyprland/default.nix` with `env = KEY,VALUE`.
@@ -40,13 +40,31 @@
 
 ## Gotchas
 
+- `configs/nixos/registry/stable-uid.nix` receives library functions through `lib`.
+  Qualify its library calls with `lib.`.
 - Guest modules are host-agnostic wiring, while host files own deployment-specific service configuration such as served volumes and host paths.
   For example, `guests/copyparty.nix` should expose options and translate them into guest mounts/service settings, while `hosts/pikachu/default.nix` chooses `/inbox`, `/media`, and their backing paths.
   Guest addresses and routes are host-level configuration because a guest module can be used on multiple hosts.
 - `sops.secrets.<name>.owner` must name a user known on the decrypting host.
   Do not set the owner to a guest-only service user unless the host also declares that user.
   Use a host-visible owner plus a shared group mode when the guest service can read the decrypted secret file through its group.
-- Pikachu deploys from the monorepo checkout copied to `~/dev`.
-  Do not use the old `~/wrk/dotfiles` path for remote rebuild commands.
+- A read-only guest bind mount cannot contain nested writable bind mounts unless their mount-point
+  directories already exist inside the read-only source.
+  For aggregate Copyparty volumes such as `/srv` with nested `/srv/inbox`, keep the guest bind mount
+  writable and enforce read-only behavior through Copyparty access plus service `ReadWritePaths`.
+- `deploy-to` builds from the source checkout, records the imported closure as the target system profile,
+  and activates it. Do not rely on a target-local monorepo checkout for remote deployment.
+- On Pikachu, `nix copy --to ssh://pikachu` accepted a small `nix store add-file` probe,
+  but rejected locally built system paths that lacked trusted signatures.
+  Use a sudo `nix-store --import` path for unsigned deploy closures.
+- Public DNS entries are not managed through the NixOS configuration.
+  Do not describe NixOS route choices as public-DNS management.
 - Do not hand-author `hardware-configuration.nix` for a host that has not been generated on that machine.
   Generate it on the target system or live ISO, then stage it before evaluating the flake.
+- Configure the Chaotic Nyx cache only on hosts that select `linuxPackages_cachyos` (currently Neogaia
+  and Zeus), not in the generic host module.
+- Module-relative paths resolve from the module file. Update them when moving a module into a subdirectory.
+- On Pikachu, `uptime` does not support `-s`. Use `who -b` to report the boot time.
+- Evaluating a NixOS guest's inner `config.services.nginx` can force incomplete ACME values.
+  Evaluate the parent host's `config.system.build.toplevel` to validate an ACME-enabled guest.
+- `pkgs.systemd` does not set `meta.mainProgram`. Use `lib.getExe' pkgs.systemd "systemctl"` instead of `lib.getExe pkgs.systemd`.

configs/nixos/guests/actualbudget.nix

@@ -1,43 +0,0 @@
-{
-  config,
-  lib,
-  ...
-}:
-let
-  cfg = config.guests.actualbudget;
-  dataDir = "/data";
-in
-{
-  options.guests.actualbudget = {
-    dataPath = lib.mkOption {
-      type = lib.types.nullOr lib.types.str;
-      default = null;
-      example = "/srv/actualbudget";
-      description = "Host path bind-mounted as Actual Budget's data directory.";
-    };
-  };
-
-  config = lib.mkIf cfg.enable {
-    assertions = [
-      {
-        assertion = cfg.dataPath != null;
-        message = "guests.actualbudget.dataPath must point at the host directory that stores Actual Budget data.";
-      }
-    ];
-
-    guests.actualbudget = {
-      interior = {
-        modules.services.actualbudget = {
-          enable = true;
-          inherit dataDir;
-        };
-      };
-      mounts.${dataDir}.directory = cfg.dataPath;
-      limits = {
-        memory = lib.mkDefault "2G";
-        cpu = lib.mkDefault "200%";
-        tasksMax = lib.mkDefault 512;
-      };
-    };
-  };
-}

configs/nixos/guests/copyparty.nix

@@ -5,51 +5,13 @@
 }:
 let
   cfg = config.guests.copyparty;
-
-  volumeType = lib.types.submodule {
-    options = {
-      hostPath = lib.mkOption {
-        type = lib.types.str;
-        description = "Host path bind-mounted into the Copyparty guest for this volume.";
-      };
-
-      path = lib.mkOption {
-        type = lib.types.str;
-        description = "Guest path served by this Copyparty volume.";
-      };
-
-      access = lib.mkOption {
-        type = lib.types.attrsOf (lib.types.listOf lib.types.str);
-        default = { };
-        description = "Copyparty access map from permission string to account names.";
-      };
-
-      flags = lib.mkOption {
-        type = lib.types.listOf lib.types.str;
-        default = [ ];
-        description = "Copyparty volume flags.";
-      };
-    };
-  };
 in
 {
   options.guests.copyparty = {
-    accountName = lib.mkOption {
-      type = lib.types.str;
-      default = "alexion";
-      description = "Copyparty account name configured for password authentication.";
-    };
-
     passwordSecret = lib.mkOption {
       type = lib.types.str;
-      default = "services/copyparty/users/alexion/password";
-      description = "SOPS secret name containing the Copyparty account password.";
-    };
-
-    stateDir = lib.mkOption {
-      type = lib.types.str;
-      default = "/var/lib/copyparty";
-      description = "Guest path where Copyparty stores service state.";
+      default = "services/copyparty/users/${config.user.name}/password";
+      description = "SOPS secret name that contains the Copyparty account password.";
     };
 
     statePath = lib.mkOption {
@@ -66,7 +28,39 @@ in
     };
 
     volumes = lib.mkOption {
-      type = lib.types.attrsOf volumeType;
+      type = lib.types.attrsOf (
+        lib.types.submodule {
+          options = {
+            hostPath = lib.mkOption {
+              type = lib.types.str;
+              description = "Host path bind-mounted into the Copyparty guest for this volume.";
+            };
+
+            path = lib.mkOption {
+              type = lib.types.str;
+              description = "Guest path served by this Copyparty volume.";
+            };
+
+            access = lib.mkOption {
+              type = lib.types.attrsOf (lib.types.listOf lib.types.str);
+              default = { };
+              description = "Copyparty access map from permission string to account names.";
+            };
+
+            readOnly = lib.mkOption {
+              type = lib.types.bool;
+              default = false;
+              description = "Serve this Copyparty volume read-only.";
+            };
+
+            flags = lib.mkOption {
+              type = lib.types.attrs;
+              default = { };
+              description = "Copyparty volume flags.";
+            };
+          };
+        }
+      );
       default = { };
       description = "Copyparty volumes keyed by their URL path.";
     };
@@ -84,41 +78,57 @@ in
       }
     ];
 
+    registry.homepage.${config.networking.hostName}.copyparty = {
+      tab = "Apps";
+      section = "Files";
+      name = "Copyparty";
+      description = "Files on ${config.networking.hostName}";
+      icon = "copyparty.svg";
+      href = lib.mkIf cfg.reverseProxy.enable "https://${cfg.reverseProxy.route.domain}/?h";
+    };
+
     guests.copyparty = {
       interior.modules.services.copyparty = {
         enable = true;
-        inherit (cfg) accountName stateDir;
         passwordFile = "/run/secrets/${cfg.passwordSecret}";
         reverseProxy = {
           enable = cfg.reverseProxy.enable;
           inherit (cfg.reverseProxy) trustedSources;
         };
-        volumes = lib.mapAttrs (_urlPath: volume: {
-          inherit (volume) path access flags;
-        }) cfg.volumes;
+        volumes = lib.mapAttrs (
+          _urlPath: volume:
+          {
+            inherit (volume)
+              path
+              readOnly
+              ;
+          }
+          // lib.optionalAttrs (volume.access != { }) { inherit (volume) access; }
+          // lib.optionalAttrs (volume.flags != { }) { inherit (volume) flags; }
+        ) cfg.volumes;
       };
 
-      mounts =
-        {
-          ${cfg.stateDir} = {
-            directory = cfg.statePath;
-            owner = config.registry."stable-uid".${config.networking.hostName}.copyparty;
-            group = "storage";
-            mode = "0770";
-          };
-          ${"/run/secrets/${cfg.passwordSecret}"} = {
-            file = config.sops.secrets.${cfg.passwordSecret}.path;
-            readOnly = true;
-          };
+      mounts = {
+        "/var/lib/copyparty" = {
+          directory = cfg.statePath;
+          owner = config.registry."stable-uid".${config.networking.hostName}.copyparty;
+          group = "storage";
+          mode = "0770";
+        };
+        ${"/run/secrets/${cfg.passwordSecret}"} = {
+          file = config.sops.secrets.${cfg.passwordSecret}.path;
+          readOnly = true;
+        };
+      }
+      // lib.mapAttrs' (
+        _urlPath: volume:
+        lib.nameValuePair volume.path {
+          directory = volume.hostPath;
+          owner = "root";
+          group = "storage";
+          mode = "2770";
         }
-        // lib.mapAttrs' (_urlPath: volume:
-          lib.nameValuePair volume.path {
-            directory = volume.hostPath;
-            owner = "root";
-            group = "storage";
-            mode = "2770";
-          }
-        ) cfg.volumes;
+      ) cfg.volumes;
       limits = {
         memory = lib.mkDefault "2G";
         cpu = lib.mkDefault "200%";

configs/nixos/guests/homepage.nix

@@ -0,0 +1,46 @@
+{
+  config,
+  lib,
+  ...
+}:
+let
+  cfg = config.guests.homepage;
+  environmentFile = "/run/secrets/homepage.env";
+in
+{
+  config = lib.mkIf cfg.enable {
+    guests.homepage = {
+      interior.modules.services.homepage = {
+        enable = true;
+        hostName = config.networking.hostName;
+        inherit environmentFile;
+      };
+
+      mounts.${environmentFile} = {
+        file = config.sops.templates."homepage.env".path;
+        readOnly = true;
+      };
+
+      limits = {
+        memory = lib.mkDefault "1G";
+        cpu = lib.mkDefault "100%";
+        tasksMax = lib.mkDefault 256;
+      };
+    };
+
+    sops.secrets = {
+      "services/metadata/latitude" = { };
+      "services/metadata/longitude" = { };
+    };
+
+    sops.templates."homepage.env" = {
+      owner = "root";
+      group = "storage";
+      mode = "0440";
+      content = ''
+        HOMEPAGE_VAR_LATITUDE=${config.sops.placeholder."services/metadata/latitude"}
+        HOMEPAGE_VAR_LONGITUDE=${config.sops.placeholder."services/metadata/longitude"}
+      '';
+    };
+  };
+}

configs/nixos/guests/navidrome.nix

@@ -0,0 +1,103 @@
+{
+  config,
+  lib,
+  ...
+}:
+let
+  guestCfg = config.guests.navidrome;
+  serviceCfg = config.containers.navidrome.config.modules.services.navidrome;
+in
+{
+  options.guests.navidrome = {
+    dataPath = lib.mkOption {
+      type = lib.types.nullOr lib.types.str;
+      default = null;
+      example = "/srv/navidrome";
+      description = "Host path mounted as Navidrome's data folder.";
+    };
+
+    libraryPath = lib.mkOption {
+      type = lib.types.nullOr lib.types.str;
+      default = null;
+      example = "/srv/music";
+      description = "Host path mounted as Navidrome's library folder.";
+    };
+
+    lastfmApiKeySecret = lib.mkOption {
+      type = lib.types.str;
+      default = "services/navidrome/lastfm/api-key";
+      description = "SOPS secret name containing the Navidrome Last.fm API key.";
+    };
+
+    lastfmSecretSecret = lib.mkOption {
+      type = lib.types.str;
+      default = "services/navidrome/lastfm/secret";
+      description = "SOPS secret name containing the Navidrome Last.fm secret.";
+    };
+  };
+
+  config = lib.mkIf guestCfg.enable {
+    assertions = [
+      {
+        assertion = guestCfg.dataPath != null;
+        message = "guests.navidrome.dataPath must point at the host directory that stores Navidrome data.";
+      }
+      {
+        assertion = guestCfg.libraryPath != null;
+        message = "guests.navidrome.libraryPath must point at the host directory that stores Navidrome's library folder.";
+      }
+    ];
+
+    registry.homepage.${config.networking.hostName}.navidrome = {
+      tab = "Apps";
+      section = "Media";
+      name = "Navidrome";
+      description = "Music";
+      icon = "navidrome.png";
+    };
+
+    guests.navidrome = {
+      interior.modules.services.navidrome.enable = true;
+
+      mounts = {
+        ${serviceCfg.dataFolder} = {
+          directory = guestCfg.dataPath;
+          owner = config.registry."stable-uid".${config.networking.hostName}.navidrome;
+          group = "storage";
+          mode = "2770";
+        };
+        ${serviceCfg.musicFolder} = {
+          directory = guestCfg.libraryPath;
+          owner = "root";
+          group = "storage";
+          mode = "2770";
+        };
+        ${serviceCfg.environmentFile} = {
+          file = config.sops.templates."navidrome.env".path;
+          readOnly = true;
+        };
+      };
+
+      limits = {
+        memory = lib.mkDefault "2G";
+        cpu = lib.mkDefault "200%";
+        tasksMax = lib.mkDefault 512;
+      };
+    };
+
+    sops.secrets = {
+      ${guestCfg.lastfmApiKeySecret}.sopsFile = ../secrets + "/${config.networking.hostName}.yaml";
+      ${guestCfg.lastfmSecretSecret}.sopsFile = ../secrets + "/${config.networking.hostName}.yaml";
+    };
+
+    sops.templates."navidrome.env" = {
+      owner = "root";
+      group = "storage";
+      mode = "0440";
+      content = ''
+        ND_LASTFM_APIKEY=${config.sops.placeholder.${guestCfg.lastfmApiKeySecret}}
+        ND_LASTFM_SECRET=${config.sops.placeholder.${guestCfg.lastfmSecretSecret}}
+      '';
+    };
+  };
+}

configs/nixos/guests/palworld.nix

@@ -0,0 +1,155 @@
+{
+  config,
+  lib,
+  ...
+}:
+let
+  cfg = config.guests.palworld;
+  steamDir = "/data/steamcmd";
+  installDir = "/data/server";
+  stateDir = "/data/state";
+in
+{
+  options.guests.palworld = {
+    steamPath = lib.mkOption {
+      type = lib.types.nullOr lib.types.str;
+      default = null;
+      example = "/srv/steamcmd";
+      description = "Host path bind-mounted as SteamCMD's metadata directory.";
+    };
+
+    installPath = lib.mkOption {
+      type = lib.types.nullOr lib.types.str;
+      default = null;
+      example = "/srv/palworld/server";
+      description = "Host path bind-mounted as Palworld's server install directory.";
+    };
+
+    statePath = lib.mkOption {
+      type = lib.types.nullOr lib.types.str;
+      default = null;
+      example = "/srv/palworld/state";
+      description = "Host path bind-mounted as Palworld's durable state directory.";
+    };
+
+    serverName = lib.mkOption {
+      type = lib.types.str;
+      default = "palworld";
+      description = "Name shown for the Palworld server.";
+    };
+
+    port = lib.mkOption {
+      type = lib.types.port;
+      default = 8211;
+      description = "UDP port for the Palworld server.";
+    };
+
+    publicIP = lib.mkOption {
+      type = lib.types.nullOr lib.types.str;
+      default = null;
+      description = "Public IP address advertised by the Palworld server.";
+    };
+
+    autoStart = lib.mkOption {
+      type = lib.types.bool;
+      default = true;
+      description = "Start the Palworld server after the guest reaches network readiness.";
+    };
+
+    passwordSecret = lib.mkOption {
+      type = lib.types.str;
+      default = "services/game-servers/password";
+      description = "SOPS secret name containing the Palworld server password.";
+    };
+
+    adminPasswordSecret = lib.mkOption {
+      type = lib.types.str;
+      default = "services/game-servers/password";
+      description = "SOPS secret name containing the Palworld admin password.";
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    assertions = [
+      {
+        assertion = cfg.steamPath != null;
+        message = "guests.palworld.steamPath must point at the host directory that stores SteamCMD metadata.";
+      }
+      {
+        assertion = cfg.installPath != null;
+        message = "guests.palworld.installPath must point at the host directory that stores Palworld server files.";
+      }
+      {
+        assertion = cfg.statePath != null;
+        message = "guests.palworld.statePath must point at the host directory that stores Palworld durable state.";
+      }
+    ];
+
+    guests.palworld = {
+      interior.modules.services.games.palworld = {
+        enable = true;
+        inherit (cfg)
+          serverName
+          port
+          publicIP
+          autoStart
+          ;
+        inherit steamDir installDir stateDir;
+        passwordFile = "/run/secrets/${cfg.passwordSecret}";
+        adminPasswordFile = "/run/secrets/${cfg.adminPasswordSecret}";
+      };
+
+      mounts = {
+        ${steamDir} = {
+          directory = cfg.steamPath;
+          owner = config.registry."stable-uid".${config.networking.hostName}.steamcmd;
+          group = "storage";
+          mode = "0770";
+        };
+        ${installDir} = {
+          directory = cfg.installPath;
+          owner = config.registry."stable-uid".${config.networking.hostName}.steamcmd;
+          group = "storage";
+          mode = "0770";
+        };
+        ${stateDir} = {
+          directory = cfg.statePath;
+          owner = config.registry."stable-uid".${config.networking.hostName}.steamcmd;
+          group = "storage";
+          mode = "0770";
+        };
+        ${"/run/secrets/${cfg.passwordSecret}"} = {
+          file = config.sops.secrets.${cfg.passwordSecret}.path;
+          readOnly = true;
+        };
+      }
+      // lib.optionalAttrs (cfg.adminPasswordSecret != cfg.passwordSecret) {
+        ${"/run/secrets/${cfg.adminPasswordSecret}"} = {
+          file = config.sops.secrets.${cfg.adminPasswordSecret}.path;
+          readOnly = true;
+        };
+      };
+
+      limits = {
+        memory = lib.mkDefault "8G";
+        cpu = lib.mkDefault "400%";
+        tasksMax = lib.mkDefault 2048;
+      };
+    };
+
+    sops.secrets = {
+      ${cfg.passwordSecret} = {
+        owner = "root";
+        group = "storage";
+        mode = "0440";
+      };
+    }
+    // lib.optionalAttrs (cfg.adminPasswordSecret != cfg.passwordSecret) {
+      ${cfg.adminPasswordSecret} = {
+        owner = "root";
+        group = "storage";
+        mode = "0440";
+      };
+    };
+  };
+}

configs/nixos/guests/reverse-proxy.nix

@@ -23,11 +23,6 @@ in
             enableACME = true;
             locations."/".proxyPass = "http://10.23.20.32";
           };
-          "music.alexion.dev" = {
-            forceSSL = true;
-            enableACME = true;
-            locations."/".proxyPass = "http://10.23.20.32";
-          };
           "photos.alexion.dev" = {
             forceSSL = true;
             enableACME = true;

configs/nixos/guests/valheim.nix

@@ -0,0 +1,116 @@
+{
+  config,
+  lib,
+  ...
+}:
+let
+  cfg = config.guests.valheim;
+  steamDir = "/data/steamcmd";
+  installDir = "/data/server";
+  stateDir = "/data/state";
+in
+{
+  options.guests.valheim = {
+    steamPath = lib.mkOption {
+      type = lib.types.nullOr lib.types.str;
+      default = null;
+      example = "/srv/steamcmd";
+      description = "Host path bind-mounted as SteamCMD's metadata directory.";
+    };
+
+    installPath = lib.mkOption {
+      type = lib.types.nullOr lib.types.str;
+      default = null;
+      example = "/srv/valheim/server";
+      description = "Host path bind-mounted as Valheim's server install directory.";
+    };
+
+    statePath = lib.mkOption {
+      type = lib.types.nullOr lib.types.str;
+      default = null;
+      example = "/srv/valheim/state";
+      description = "Host path bind-mounted as Valheim's world state directory.";
+    };
+
+    serverName = lib.mkOption {
+      type = lib.types.str;
+      default = "valheim";
+      description = "Name shown for the Valheim server.";
+    };
+
+    port = lib.mkOption {
+      type = lib.types.port;
+      default = 2456;
+      description = "Base UDP port for the Valheim server.";
+    };
+
+    passwordSecret = lib.mkOption {
+      type = lib.types.str;
+      default = "services/game-servers/password";
+      description = "SOPS secret name containing the Valheim server password.";
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    assertions = [
+      {
+        assertion = cfg.steamPath != null;
+        message = "guests.valheim.steamPath must point at the host directory that stores SteamCMD metadata.";
+      }
+      {
+        assertion = cfg.installPath != null;
+        message = "guests.valheim.installPath must point at the host directory that stores Valheim server files.";
+      }
+      {
+        assertion = cfg.statePath != null;
+        message = "guests.valheim.statePath must point at the host directory that stores Valheim world state.";
+      }
+    ];
+
+    guests.valheim = {
+      interior.modules.services.games.valheim = {
+        enable = true;
+        inherit (cfg) serverName port;
+        inherit steamDir installDir stateDir;
+        passwordFile = "/run/secrets/${cfg.passwordSecret}";
+      };
+
+      mounts = {
+        ${steamDir} = {
+          directory = cfg.steamPath;
+          owner = config.registry."stable-uid".${config.networking.hostName}.steamcmd;
+          group = "storage";
+          mode = "0770";
+        };
+        ${installDir} = {
+          directory = cfg.installPath;
+          owner = config.registry."stable-uid".${config.networking.hostName}.steamcmd;
+          group = "storage";
+          mode = "0770";
+        };
+        ${stateDir} = {
+          directory = cfg.statePath;
+          owner = config.registry."stable-uid".${config.networking.hostName}.steamcmd;
+          group = "storage";
+          mode = "0770";
+        };
+        ${"/run/secrets/${cfg.passwordSecret}"} = {
+          file = config.sops.secrets.${cfg.passwordSecret}.path;
+          readOnly = true;
+        };
+      };
+
+      limits = {
+        memory = lib.mkDefault "4G";
+        cpu = lib.mkDefault "400%";
+        tasksMax = lib.mkDefault 1024;
+      };
+    };
+
+    sops.secrets.${cfg.passwordSecret} = {
+      owner = "root";
+      group = "storage";
+      mode = "0440";
+    };
+  };
+}

configs/nixos/hosts/neogaia/default.nix

@@ -1,6 +1,6 @@
 {
   inputs,
-  pkgs,
+  util,
   ...
 }:
 # neogaia — Dell XPS 13 9380 laptop.
@@ -13,23 +13,9 @@
     ./disk.nix
   ];
 
-  system.stateVersion = "26.05";
+  modules.host.cachyos.enable = true;
 
-  # systemd-boot on the EFI system partition.
-  boot.loader.systemd-boot.enable = true;
-  boot.loader.efi.canTouchEfiVariables = true;
-
-  boot.kernelPackages = pkgs.linuxPackages_cachyos;
-
-  # Redistributable firmware for the QCA6174 wifi (ath10k blobs).
-  # Intel microcode updates follow from this, so none is declared here.
-  hardware.enableRedistributableFirmware = true;
-
-  # RAM-backed swap, no on-disk swap partition.
-  zramSwap.enable = true;
-
-  # So wifi can be joined from the console.
-  networking.networkmanager.enable = true;
+  modules.network.enable = true;
 
   registry.address.neogaia.self = "10.23.50.146";
 
@@ -41,22 +27,9 @@
     peer = {
       publicKey = "sGEkSD+gEdIMXi4PBN3AhwHGc4tWMtcjOIey3s7yb3I=";
       endpoint = "100.0.90.192:51820";
-      allowedIPs = [ "10.23.0.0/16" ];
     };
   };
 
-  registry.shell-shortcut.neogaia = {
-    vpn-on = "sudo systemctl start wireguard-wg-home.target";
-    vpn-off = ''sudo systemctl stop 'wireguard-wg-home*.service' wireguard-wg-home.target'';
-  };
-
-  # So setup can be driven over the network.
-  # The matching host public keys sit beside this file in plaintext, since
-  # publishing them is their purpose.
-  modules.network.ssh.enable = true;
-  modules.network.ssh.hostKeys.sopsFile = ../../secrets/neogaia.yaml;
-  modules.network.ssh.userKey.sopsFile = ../../secrets/neogaia.yaml;
-
   modules.monorepo.enable = true;
   modules.shell.herdr.enable = true;
   modules.shell.gitea-axi.enable = true;
@@ -67,6 +40,23 @@
   modules.desktop.apps.obsidian.enable = true;
   modules.desktop.apps.steam.enable = true;
 
-  time.timeZone = "America/New_York";
-  i18n.defaultLocale = "en_GB.UTF-8";
+  registry.waybar.neogaia.battery = {
+    order = 70;
+    settings = {
+      format = "{icon} {capacity}%";
+      format-charging = "${util.glyph "f0e7"} {capacity}%";
+      format-icons = [
+        (util.glyph "f244")
+        (util.glyph "f243")
+        (util.glyph "f242")
+        (util.glyph "f241")
+        (util.glyph "f240")
+      ];
+      states = {
+        warning = 20;
+        critical = 10;
+      };
+    };
+  };
+
 }

configs/nixos/hosts/neogaia/disk.nix

@@ -1,4 +1,4 @@
-{ ... }:
+_:
 # neogaia's disk layout for disko: one NVMe disk, GPT, with an EFI system
 # partition and a LUKS container holding btrfs subvolumes.
 # No swap partition, since swap is zram.

configs/nixos/hosts/neogaia/ssh_user_ed25519_key.pub

@@ -0,0 +1 @@
+ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIGxQ4kWsBo2OGYIPOkFe0vNEcB3yoJwAu0y9wrdQzALE alexion@neogaia

configs/nixos/hosts/pikachu/default.nix

@@ -13,82 +13,77 @@
     ./disk.nix
   ];
 
-  system.stateVersion = "26.05";
-
-  boot.loader.systemd-boot.enable = true;
-  boot.loader.efi.canTouchEfiVariables = true;
-
   hardware.cpu.intel.updateMicrocode = true;
-  hardware.enableRedistributableFirmware = true;
 
-  zramSwap.enable = true;
-
-  systemd.network = {
-    enable = true;
-    netdevs = {
-      "40-br-vlan20".netdevConfig = {
-        Name = "br-vlan20";
-        Kind = "bridge";
-      };
-      "40-vlan20" = {
-        netdevConfig = {
-          Name = "vlan20";
-          Kind = "vlan";
-        };
-        vlanConfig.Id = 20;
-      };
-    };
-
-    networks = {
-      "10-uplink" = {
-        matchConfig = {
-          Name = "enp2s0";
-          MACAddress = "78:55:36:07:af:49";
-        };
-        networkConfig.DHCP = "yes";
-        vlan = [ "vlan20" ];
-        linkConfig.RequiredForOnline = "routable";
-      };
-      "40-vlan20" = {
-        matchConfig.Name = "vlan20";
-        networkConfig.Bridge = "br-vlan20";
-        linkConfig.RequiredForOnline = "no";
-      };
-      "40-br-vlan20" = {
-        matchConfig.Name = "br-vlan20";
-        linkConfig.RequiredForOnline = "no";
-      };
-    };
+  modules.network.vlans = {
+    interface = "enp2s0";
+    ids = [ 20 ];
   };
-  networking.useDHCP = false;
-
-  modules.network.vlans.ids = [ 20 ];
 
   boot.zfs.forceImportRoot = false;
 
-  modules.zfs = {
+  modules.host.zfs = {
     enable = true;
-    hostId = "2346edbd";
     pools.pikachu = { };
   };
 
   registry.address.pikachu.self = "10.23.10.102";
 
-  modules.network.ssh.enable = true;
-  modules.network.ssh.hostKeys.sopsFile = ../../secrets/pikachu.yaml;
-  modules.network.ssh.userKey.sopsFile = ../../secrets/pikachu.yaml;
-
-  guests.actualbudget = {
+  guests.valheim = {
     enable = true;
     vlan = 20;
-    mac = "BC:24:11:C1:CD:28";
-    dataPath = "/pikachu/data/actualbudget";
-    address = "10.23.20.42";
+    address = "10.23.20.197";
+    steamPath = "/pikachu/data/steamcmd";
+    installPath = "/pikachu/data/servers/valheim/main";
+    statePath = "/pikachu/media/games/servers/valheim/main";
+    serverName = "main";
     reverseProxy = {
       enable = true;
       route = {
-        domain = "budget.alexion.dev";
-        port = 5006;
+        domain = "valheim.alexion.dev";
+        protocol = "udp";
+        ports = [
+          config.guests.valheim.port
+          (config.guests.valheim.port + 1)
+        ];
+      };
+    };
+  };
+
+  guests.palworld = {
+    enable = true;
+    vlan = 20;
+    address = "10.23.20.250";
+    steamPath = "/pikachu/data/steamcmd";
+    installPath = "/pikachu/data/servers/palworld/tracion";
+    statePath = "/pikachu/media/games/servers/palworld/tracion";
+    serverName = "Tracion";
+    autoStart = false;
+    adminPasswordSecret = "services/game-servers/admin/password";
+    publicIP = config.guests.palworld.address;
+    reverseProxy = {
+      enable = true;
+      route = {
+        domain = "palworld.alexion.dev";
+        protocol = "udp";
+        ports = [ config.guests.palworld.port ];
+      };
+    };
+  };
+
+  guests.navidrome = {
+    enable = true;
+    vlan = 20;
+    mac = "BC:24:11:C9:17:83";
+    dataPath = "/pikachu/data/navidrome";
+    libraryPath = "/pikachu/media/music";
+    address = "10.23.20.43";
+    reverseProxy = {
+      enable = true;
+      route = {
+        domain = "music.alexion.dev";
+        protocol = "https";
+        port = 4533;
       };
     };
   };
@@ -100,6 +95,20 @@
     address = "10.23.20.109";
   };
 
+  guests.homepage = {
+    enable = true;
+    vlan = 20;
+    address = "10.23.20.110";
+    reverseProxy = {
+      enable = true;
+      route = {
+        domain = "home";
+        protocol = "http";
+        port = 8082;
+      };
+    };
+  };
+
   guests.copyparty = {
     enable = true;
     vlan = 20;
@@ -110,30 +119,31 @@
       enable = true;
       route = {
         domain = "files.alexion.dev";
+        protocol = "https";
         port = 3923;
+        clientMaxBodySize = "1g";
       };
       trustedSources = [ "${registry.address.${config.networking.hostName}."reverse-proxy"}/32" ];
     };
     volumes = {
+      "/" = {
+        hostPath = "/pikachu/data/copyparty/root";
+        path = "/srv";
+        readOnly = true;
+      };
       "/inbox" = {
         hostPath = "/pikachu/__inbox";
-        path = "/srv/inbox";
-        access.A = [ "alexion" ];
-        flags = [
-          "d2d"
-          "d2t"
-          "dthumb"
-        ];
+        path = "/pikachu/__inbox";
       };
       "/media" = {
         hostPath = "/pikachu/media";
-        path = "/srv/media";
-        access.A = [ "alexion" ];
-        flags = [
-          "d2d"
-          "d2t"
-          "dthumb"
-        ];
+        path = "/pikachu/media";
+      };
+      "/opds" = {
+        hostPath = "/pikachu/data/opds";
+        path = "/pikachu/data/opds";
+        readOnly = true;
+        flags.opds = true;
       };
     };
   };
@@ -144,6 +154,4 @@
     usbutils
   ];
 
-  time.timeZone = "America/New_York";
-  i18n.defaultLocale = "en_GB.UTF-8";
 }

configs/nixos/hosts/pikachu/disk.nix

@@ -1,4 +1,4 @@
-{ ... }:
+_:
 # pikachu's install layout for disko: one NVMe boot disk with an EFI system partition and ext4 root.
 # The existing 8 TB ZFS mirror is imported by name and is never declared here.
 {

configs/nixos/hosts/pikachu/ssh_user_ed25519_key.pub

@@ -0,0 +1 @@
+ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAINNqJIC6VRXyvrNf3n9su9KdPCikC3CjK/QrCK2reHdB alexion@pikachu

configs/nixos/hosts/zeus/default.nix

@@ -1,41 +1,35 @@
 {
   config,
   lib,
-  pkgs,
   ...
 }:
 # zeus — Ryzen desktop with AMD graphics.
 # Disk layout is in ./disk.nix.
 # `fileSystems` are derived from it, none declared here.
 {
-  imports = [ ./disk.nix ] ++ lib.optional (builtins.pathExists ./hardware-configuration.nix) ./hardware-configuration.nix;
+  imports = [
+    ./disk.nix
+  ]
+  ++ lib.optional (builtins.pathExists ./hardware-configuration.nix) ./hardware-configuration.nix;
 
-  system.stateVersion = "26.05";
   nixpkgs.hostPlatform = "x86_64-linux";
 
-  # systemd-boot on the EFI system partition.
-  boot.loader.systemd-boot.enable = true;
-  boot.loader.efi.canTouchEfiVariables = true;
+  modules.host.cachyos.enable = true;
 
-  boot.kernelPackages = pkgs.linuxPackages_cachyos;
-
-  hardware.enableRedistributableFirmware = true;
   hardware.graphics = {
     enable = true;
     enable32Bit = true;
   };
 
-  # RAM-backed swap, no on-disk swap partition.
-  zramSwap.enable = true;
+  modules.network.enable = true;
 
-  networking.networkmanager.enable = true;
+  services.logind.settings.Login = {
+    HandlePowerKey = "ignore";
+    HandlePowerKeyLongPress = "ignore";
+  };
 
   registry.address.zeus.self = "10.23.50.221";
 
-  modules.network.ssh.enable = true;
-  modules.network.ssh.hostKeys.sopsFile = ../../secrets/zeus.yaml;
-  modules.network.ssh.userKey.sopsFile = ../../secrets/zeus.yaml;
-
   hardware.bluetooth = {
     enable = true;
     powerOnBoot = true;
@@ -45,18 +39,29 @@
   modules.shell.herdr.enable = true;
   modules.shell.gitea-axi.enable = true;
   modules.shell.pi.enable = true;
+  modules.shell.omp.enable = true;
 
   modules.desktop.enable = true;
   modules.desktop.apps.obsidian.enable = true;
+  modules.desktop.apps.r2modman.enable = true;
   modules.desktop.apps.signal.enable = true;
   modules.desktop.apps.steam.enable = true;
   modules.desktop.apps.vencord.enable = true;
 
   home-manager.users.${config.user.name}.wayland.windowManager.hyprland.settings.monitor = [
-    "HDMI-A-1,1920x1080@120,0x0,1,transform,3"
-    "DP-3,2560x1440@239.96,1080x0,1"
+    {
+      output = "HDMI-A-1";
+      mode = "1920x1080@120";
+      position = "-1080x0";
+      scale = 1;
+      transform = 3;
+    }
+    {
+      output = "DP-3";
+      mode = "2560x1440@239.96";
+      position = "0x0";
+      scale = 1;
+    }
   ];
 
-  time.timeZone = "America/New_York";
-  i18n.defaultLocale = "en_GB.UTF-8";
 }

configs/nixos/hosts/zeus/disk.nix

@@ -1,4 +1,4 @@
-{ ... }:
+_:
 # zeus's disk layout for disko: two NVMe disks with one EFI system partition
 # and two LUKS containers joined into one btrfs filesystem.
 # No swap partition, since swap is zram.

configs/nixos/hosts/zeus/ssh_user_ed25519_key.pub

@@ -0,0 +1 @@
+ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIIRBcHHuubptXCdvED/p2dR3MpjGN/AimqLasLY5984G alexion@zeus

configs/nixos/modules/default.nix

@@ -1,56 +1,35 @@
 {
   config,
   lib,
-  pkgs,
   inputs,
   ...
 }:
 # The shared foundation for every host and guest.
-let
-  inherit (lib) mkOption types;
-  user = config.user;
-
-  pinArgs = prev: {
-    inherit (prev.stdenv.hostPlatform) system;
-    config.allowUnfree = true;
-  };
-in
 {
   imports = [ inputs.home-manager.nixosModules.home-manager ];
 
   options.user = {
-    name = mkOption {
-      type = types.str;
+    name = lib.mkOption {
+      type = lib.types.str;
       default = "alexion";
       description = ''
-        Primary interactive user for this system.
-        This drives the system account and Home Manager user together.
+        Names the primary user account.
+        Host configuration uses this name for the Home Manager user.
       '';
     };
-    description = mkOption {
-      type = types.str;
-      default = "Alexion";
-      description = "Human-readable description for the primary user.";
-    };
   };
 
   config = {
-    nixpkgs.overlays = [
-      (_final: prev: {
-        unstable = import inputs.nixpkgs-unstable (pinArgs prev);
-        stable = import inputs.nixpkgs-stable (pinArgs prev);
-      })
-    ];
-    nixpkgs.config.allowUnfree = true;
+    system.stateVersion = "26.05";
 
+    nixpkgs.config.allowUnfree = true;
     nix.settings.experimental-features = [
       "nix-command"
       "flakes"
     ];
 
-    users.users.${user.name} = {
+    users.users.${config.user.name} = {
       isNormalUser = true;
-      description = user.description;
       extraGroups = [
         "wheel"
         "storage"
@@ -59,67 +38,7 @@ in
 
     users.groups.storage.gid = 10000;
 
-    home-manager = {
-      useGlobalPkgs = true;
-      useUserPackages = true;
-      extraSpecialArgs = {
-        inherit inputs;
-      };
-      users.${user.name} = {
-        home.username = user.name;
-        home.homeDirectory = "/home/${user.name}";
-        home.stateVersion = "26.05";
-        home.packages = with pkgs; [
-          eza
-          wget
-        ];
-      };
-    };
-
-    registry.shell-shortcut.${config.networking.hostName} = {
-      ls = {
-        command = "eza -alg --color=always --group-directories-first --icons=always";
-        abbreviation = false;
-      };
-      la = {
-        command = "eza -a --color=always --group-directories-first --icons=always";
-        abbreviation = false;
-      };
-      ll = {
-        command = "eza -lg --color=always --group-directories-first --icons=always";
-        abbreviation = false;
-      };
-      lt = {
-        command = "eza -aT -I '.git' --color=always --group-directories-first --icons=always";
-        abbreviation = false;
-      };
-      "l." = {
-        command = "eza -a | grep -e '^\\.'";
-        abbreviation = false;
-      };
-
-      ".." = "cd ..";
-      "..." = "cd ../..";
-      "...." = "cd ../../..";
-
-      cp = "cp -v";
-      tarnow = "tar -acf ";
-      untar = "tar -zxvf ";
-      wget = "wget -c ";
-      grep = "grep --color=auto";
-      fgrep = "fgrep --color=auto";
-      egrep = "egrep --color=auto";
-      jctl = "journalctl -p 3 -xb";
-
-      update = "sudo nixos-rebuild switch --flake .#${config.networking.hostName}";
-      cleanup = "sudo nix-collect-garbage -d";
-    };
-
-    modules.shell.fish.enable = lib.mkDefault true;
-    modules.shell.fish.defaultShell = lib.mkDefault true;
-    modules.shell.tmux.enable = lib.mkDefault true;
-    modules.shell.nvim.enable = lib.mkDefault true;
-    modules.shell.git.enable = lib.mkDefault true;
-    modules.shell.yazi.enable = lib.mkDefault true;
+    time.timeZone = "America/New_York";
+    i18n.defaultLocale = "en_GB.UTF-8";
   };
 }

configs/nixos/modules/desktop/apps/alacritty.nix

@@ -1,18 +0,0 @@
-{
-  config,
-  lib,
-  pkgs,
-  ...
-}:
-# Alacritty as the desktop terminal.
-let
-  cfg = config.modules.desktop.apps.alacritty;
-  user = config.user.name;
-in
-{
-  options.modules.desktop.apps.alacritty.enable = lib.mkEnableOption "Alacritty as the desktop terminal";
-
-  config = lib.mkIf cfg.enable {
-    home-manager.users.${user}.home.packages = [ pkgs.alacritty ];
-  };
-}

configs/nixos/modules/desktop/apps/firefox.nix

@@ -3,13 +3,12 @@
   inputs,
   lib,
   pkgs,
+  util,
   ...
 }:
-# Firefox as the desktop browser: stock mainline, hardened and de-monetized by policy.
+# Configures Firefox as the desktop browser.
 let
   cfg = config.modules.desktop.apps.firefox;
-  user = config.user.name;
-  firefoxAddons = inputs.firefox-addons.packages.${pkgs.stdenv.hostPlatform.system};
 in
 {
   options.modules.desktop.apps.firefox = {
@@ -19,19 +18,25 @@ in
       type = lib.types.str;
       default = "1.0";
       description = ''
-        Firefox UI and page scale, passed to `layout.css.devPixelsPerPx`.
-        Override it on hosts that need a larger browser scale, such as small
-        high-DPI laptop panels.
+        Scales Firefox UI and page content.
+
+        Sets `layout.css.devPixelsPerPx`.
+        Use a larger value for high-DPI displays.
       '';
     };
   };
 
   config = lib.mkIf cfg.enable {
-    home-manager.users.${user} = hm: {
+    registry.window-icon.${config.networking.hostName}.firefox = {
+      class = ".*[Ff]irefox.*";
+      icon = util.glyph "f269";
+    };
+
+    home-manager.users.${config.user.name} = hm: {
       programs.firefox = {
         enable = true;
 
-        # Enterprise policies: enforced and unchangeable from the browser UI.
+        # Applies policies that users cannot change in Firefox.
         policies = {
           DisableTelemetry = true;
           DisableFirefoxStudies = true;
@@ -40,7 +45,7 @@ in
           DontCheckDefaultBrowser = true;
           DisableFirefoxAccounts = true;
 
-          # Strip the monetized surfaces from the new-tab page.
+          # Removes sponsored content from the new-tab page.
           FirefoxHome = {
             SponsoredTopSites = false;
             SponsoredPocket = false;
@@ -49,23 +54,19 @@ in
         };
 
         profiles.default = {
-          isDefault = true;
-
           extensions = {
-            packages = with firefoxAddons; [
+            packages = with inputs.firefox-addons.packages.${pkgs.stdenv.hostPlatform.system}; [
               ublock-origin
               proton-pass
               sponsorblock
             ];
 
-            # The Nord chrome theme is a declared extension setting, so home-manager
-            # owns the extension-settings store, overwriting runtime changes to it.
+            # Home Manager overwrites Nord theme changes made in Firefox.
             force = true;
           };
 
-          # Stylix's Nord mapping paints the selected address-bar result a
-          # near-white grey, leaving its light text unreadable. Darken that one
-          # highlight to the Nord selection grey, from the same scheme.
+          # Stylix uses a near-white selection background.
+          # Use the Nord selection color because its text stays readable.
           extensions.settings."FirefoxColor@mozilla.com".settings.theme.colors.popup_highlight =
             let
               c = hm.config.lib.stylix.colors;
@@ -77,32 +78,26 @@ in
             };
 
           settings = {
-            # Scale the UI and page by a fixed factor.
-            # Left at auto (-1), Firefox reads the panel's 1.5x and inflates its
-            # whole chrome while point-sized apps stay put.
-            # A shade under that brings it into line without dropping to true
-            # 1:1, which reads too small at this DPI.
             "layout.css.devPixelsPerPx" = cfg.uiScale;
 
-            # Auto-enable the sideloaded Firefox Color add-on carrying the Nord
-            # chrome theme, which Firefox otherwise leaves disabled.
+            # Enables Firefox Color after Firefox sideloads the add-on.
             "extensions.autoDisableScopes" = 0;
 
-            # Sponsored surfaces the policies above do not reach.
+            # Removes sponsored content outside Firefox policies.
             "browser.urlbar.suggest.quicksuggest.sponsored" = false;
             "browser.newtabpage.activity-stream.showSponsored" = false;
             "browser.newtabpage.activity-stream.showSponsoredTopSites" = false;
           };
 
           search = {
-            # Declaring search overwrites Firefox's own engine list wholesale,
-            # so engines added later in the UI do not survive a rebuild.
+            # Home Manager replaces the engine list when this setting is enabled.
+            # Engines added in Firefox do not survive a rebuild.
             force = true;
             default = "ddg";
 
-            # The general-purpose commercial engines, hidden to leave a lean
-            # DuckDuckGo-and-Wikipedia list. They stay reachable through bangs.
-            # An engine carrying only metaData is treated as a builtin.
+            # Hides commercial search engines.
+            # Bangs still reach these engines.
+            # Entries with only `metaData` configure Firefox built-in engines.
             engines = {
               google.metaData.hidden = true;
               bing.metaData.hidden = true;
@@ -114,8 +109,7 @@ in
         };
       };
 
-      # Nord chrome for the one profile, applied through the Stylix-managed
-      # Firefox Color add-on that colorTheme enables.
+      # Applies the Nord theme through Stylix's Firefox Color add-on.
       stylix.targets.firefox = {
         enable = true;
         profileNames = [ "default" ];
@@ -133,8 +127,8 @@ in
         };
       };
 
-      # Firefox writes profiles.ini itself on first launch, so home-manager is
-      # told to own the file rather than fail activation refusing to clobber it.
+      # Firefox creates `profiles.ini` on its first launch.
+      # Force replacement during Home Manager activation.
       home.file."${hm.config.programs.firefox.configPath}/profiles.ini".force = true;
     };
   };

configs/nixos/modules/desktop/apps/ghostty.nix

@@ -2,17 +2,30 @@
   config,
   lib,
   pkgs,
+  util,
   ...
 }:
 # Ghostty as the desktop terminal.
 let
-  cfg = config.modules.desktop.apps.ghostty;
   user = config.user.name;
 in
 {
   options.modules.desktop.apps.ghostty.enable = lib.mkEnableOption "Ghostty as the desktop terminal";
 
-  config = lib.mkIf cfg.enable {
+  config = lib.mkIf config.modules.desktop.apps.ghostty.enable {
+    registry.keybind.${config.networking.hostName}.ghostty = {
+      keys = "SUPER + Return";
+      action = {
+        kind = "exec";
+        command = lib.getExe pkgs.ghostty;
+      };
+    };
+
+    registry.window-icon.${config.networking.hostName}.ghostty = {
+      class = "com.mitchellh.ghostty";
+      icon = util.glyph "f120";
+    };
+
     home-manager.users.${user}.home.packages = [ pkgs.ghostty ];
   };
 }

configs/nixos/modules/desktop/apps/obsidian.nix

@@ -2,17 +2,23 @@
   config,
   lib,
   pkgs,
+  util,
   ...
 }:
 # Obsidian as the desktop note-taking vault.
 let
-  cfg = config.modules.desktop.apps.obsidian;
   user = config.user.name;
 in
 {
-  options.modules.desktop.apps.obsidian.enable = lib.mkEnableOption "Obsidian as the desktop note-taking vault";
+  options.modules.desktop.apps.obsidian.enable =
+    lib.mkEnableOption "Obsidian as the desktop note-taking vault";
 
-  config = lib.mkIf cfg.enable {
+  config = lib.mkIf config.modules.desktop.apps.obsidian.enable {
     home-manager.users.${user}.home.packages = [ pkgs.obsidian ];
+
+    registry.window-icon.${config.networking.hostName}.obsidian = {
+      class = "obsidian";
+      icon = util.glyph "f02d";
+    };
   };
 }

configs/nixos/modules/desktop/apps/r2modman.nix

@@ -0,0 +1,18 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+# r2modman, a Thunderstore mod manager.
+let
+  user = config.user.name;
+in
+{
+  options.modules.desktop.apps.r2modman.enable =
+    lib.mkEnableOption "r2modman, a Thunderstore mod manager";
+
+  config = lib.mkIf config.modules.desktop.apps.r2modman.enable {
+    home-manager.users.${user}.home.packages = [ pkgs.r2modman ];
+  };
+}

configs/nixos/modules/desktop/apps/signal.nix

@@ -2,17 +2,22 @@
   config,
   lib,
   pkgs,
+  util,
   ...
 }:
 # Signal desktop messenger.
 let
-  cfg = config.modules.desktop.apps.signal;
   user = config.user.name;
 in
 {
   options.modules.desktop.apps.signal.enable = lib.mkEnableOption "Signal desktop messenger";
 
-  config = lib.mkIf cfg.enable {
+  config = lib.mkIf config.modules.desktop.apps.signal.enable {
     home-manager.users.${user}.home.packages = [ pkgs.signal-desktop ];
+
+    registry.window-icon.${config.networking.hostName}.signal = {
+      class = "[Ss]ignal";
+      icon = util.glyph "f4ad";
+    };
   };
 }

configs/nixos/modules/desktop/apps/steam.nix

@@ -2,16 +2,16 @@
   config,
   lib,
   pkgs,
+  util,
   ...
 }:
 # Steam game launcher and runtime integration.
-let
-  cfg = config.modules.desktop.apps.steam;
-in
 {
   options.modules.desktop.apps.steam.enable = lib.mkEnableOption "Steam game launcher";
 
-  config = lib.mkIf cfg.enable {
+  config = lib.mkIf config.modules.desktop.apps.steam.enable {
+    programs.gamemode.enable = true;
+
     programs.steam = {
       enable = true;
       package = pkgs.steam.override {
@@ -20,5 +20,14 @@ in
     };
 
     hardware.steam-hardware.enable = true;
+
+    environment.systemPackages = [
+      pkgs.gamescope
+    ];
+
+    registry.window-icon.${config.networking.hostName}.steam = {
+      class = "[Ss]team";
+      icon = util.glyph "f1b6";
+    };
   };
 }

configs/nixos/modules/desktop/apps/vencord.nix

@@ -2,17 +2,23 @@
   config,
   lib,
   pkgs,
+  util,
   ...
 }:
 # Vesktop, a Discord client with Vencord built in.
 let
-  cfg = config.modules.desktop.apps.vencord;
   user = config.user.name;
 in
 {
-  options.modules.desktop.apps.vencord.enable = lib.mkEnableOption "Vesktop, a Discord client with Vencord built in";
+  options.modules.desktop.apps.vencord.enable =
+    lib.mkEnableOption "Vesktop, a Discord client with Vencord built in";
 
-  config = lib.mkIf cfg.enable {
+  config = lib.mkIf config.modules.desktop.apps.vencord.enable {
     home-manager.users.${user}.home.packages = [ pkgs.vesktop ];
+
+    registry.window-icon.${config.networking.hostName}.vesktop = {
+      class = "[Vv]esktop";
+      icon = util.glyph "f1ff";
+    };
   };
 }

configs/nixos/modules/desktop/default.nix

@@ -1,14 +1,11 @@
 { config, lib, ... }:
 # The desktop aggregator: one flag brings up the whole graphical session.
-let
-  cfg = config.modules.desktop;
-in
 {
   options.modules.desktop.enable = lib.mkEnableOption "the keyboard-driven Hyprland desktop";
 
   # Each piece is turned on at default priority, so a host can still override
   # any one of them while the single flag above enables the whole desktop.
-  config = lib.mkIf cfg.enable {
+  config = lib.mkIf config.modules.desktop.enable {
     modules.desktop.apps.firefox.enable = lib.mkDefault true;
     modules.desktop.apps.ghostty.enable = lib.mkDefault true;
     modules.desktop.session.hyprland.enable = lib.mkDefault true;
@@ -26,5 +23,6 @@ in
     modules.desktop.utilities.screenshot.enable = lib.mkDefault true;
     modules.desktop.utilities.theming.enable = lib.mkDefault true;
     modules.desktop.utilities.userdirs.enable = lib.mkDefault true;
+    registry.env.${config.networking.hostName}.NIXOS_OZONE_WL = "1";
   };
 }

configs/nixos/modules/desktop/session/hyprland/default.nix

@@ -1,41 +1,15 @@
 {
   config,
   lib,
-  pkgs,
+  util,
   ...
 }:
 # The Hyprland compositor.
-let
-  cfg = config.modules.desktop.session.hyprland;
-  user = config.user.name;
-  cursor = config.stylix.cursor;
-
-  # Numbered-workspace switch and move for 1..9, the operator's i3 muscle memory.
-  workspaceBinds = lib.concatMap (n: [
-    "$mod, ${toString n}, workspace, ${toString n}"
-    "$mod SHIFT, ${toString n}, movetoworkspace, ${toString n}"
-  ]) (lib.range 1 9);
-
-  # Flip the tiling strategy between the two built-in layouts, since neither a
-  # dispatcher nor a keyword toggles it on its own.
-  toggleLayout = pkgs.writeShellScript "hypr-toggle-layout" ''
-    if [ "$(hyprctl getoption -j general:layout | ${pkgs.jq}/bin/jq -r .str)" = dwindle ]; then
-      hyprctl keyword general:layout master
-    else
-      hyprctl keyword general:layout dwindle
-    fi
-  '';
-in
 {
-  options.modules.desktop.session.hyprland = {
-    enable = lib.mkEnableOption "the Hyprland compositor";
+  options.modules.desktop.session.hyprland.enable = lib.mkEnableOption "the Hyprland compositor";
 
-    blur = lib.mkEnableOption ''
-      window blur. Off by default as the single biggest battery cost on a
-      laptop, left on for a host with the headroom to spend it'';
-  };
+  config = lib.mkIf config.modules.desktop.session.hyprland.enable {
 
-  config = lib.mkIf cfg.enable {
     # This program integration owns the session, portals, and polkit, launched
     # through the universal Wayland session manager.
     programs.hyprland = {
@@ -43,7 +17,7 @@ in
       withUWSM = true;
     };
 
-    home-manager.users.${user}.wayland.windowManager.hyprland = {
+    home-manager.users.${config.user.name}.wayland.windowManager.hyprland = {
       enable = true;
 
       # One package drives the whole session, so there is never a version split.
@@ -55,136 +29,216 @@ in
       # uwsm owns the systemd graphical-session targets.
       systemd.enable = false;
 
-      # Write the native hyprlang hyprland.conf, whose variable and bind syntax
-      # the settings below are expressed in.
-      configType = "hyprlang";
+      # Write the native Lua Hyprland config. Home Manager renders the Nix
+      # settings below as hl.* calls.
+      configType = "lua";
 
       settings = {
-        "$mod" = "SUPER";
-        "$terminal" = "ghostty";
-
-        # Session variables handed to the compositor directly.
-        # UWSM launches the session without the shell profile that would carry
-        # them, so a variable the compositor or its children must see is set
-        # here rather than through home-manager's sessionVariables.
-        env =
-          [
-            # Chromium and Electron apps read this to select native Wayland;
-            # nixpkgs wrappers (Obsidian's included) gate their Wayland flags on
-            # it, so without it they run under XWayland and blur at this DPI.
-            "NIXOS_OZONE_WL,1"
-          ]
-          # Bibata ships XCursor only.
-          # The hyprcursor variables name the same theme, which Hyprland
-          # resolves through its XCursor fallback.
-          ++ lib.optionals (cursor != null) [
-            "XCURSOR_THEME,${cursor.name}"
-            "XCURSOR_SIZE,${toString cursor.size}"
-            "HYPRCURSOR_THEME,${cursor.name}"
-            "HYPRCURSOR_SIZE,${toString cursor.size}"
-          ];
-
-        input = {
-          kb_layout = "us";
-          # Caps is a second Escape.
-          # Shift+Caps still toggles a real CapsLock.
-          kb_options = "caps:escape_shifted_capslock";
-          # Snappy key repeat.
-          repeat_delay = 250;
-          repeat_rate = 45;
-          accel_profile = "flat";
-          touchpad = {
-            natural_scroll = true;
-            tap-to-click = true;
-            disable_while_typing = true;
+        config = {
+          input = {
+            kb_layout = config.services.xserver.xkb.layout;
+            repeat_delay = 250;
+            repeat_rate = 45;
+            accel_profile = "flat";
+            touchpad = {
+              natural_scroll = true;
+              tap_to_click = true;
+              disable_while_typing = true;
+            };
           };
+
+          general = {
+            gaps_in = 4;
+            gaps_out = 8;
+            border_size = 2;
+            layout = "dwindle";
+          };
+
+          decoration = {
+            rounding = 6;
+            blur.enabled = false;
+          };
+
+          xwayland.force_zero_scaling = true;
+
+          dwindle.preserve_split = true;
         };
 
-        general = {
-          gaps_in = 4;
-          gaps_out = 8;
-          border_size = 2;
-          layout = "dwindle";
-        };
-
-        decoration = {
-          rounding = 6;
-          blur.enabled = cfg.blur;
-        };
-
-        # XWayland clients render at the panel's native resolution instead of
-        # being raster-scaled by the compositor at the fractional monitor scale.
-        xwayland.force_zero_scaling = true;
-
-        animations = {
-          enabled = true;
-          bezier = [ "ease, 0.25, 0.1, 0.25, 1.0" ];
-          # Durations are in centiseconds.
-          # Short values keep the motion subtle.
-          animation = [
-            "windows, 1, 3, ease"
-            "fade, 1, 3, ease"
-            # Layer surfaces like the launcher fade in a touch quicker than windows.
-            "layersIn, 1, 2, ease"
-            "fadeLayersIn, 1, 2, ease"
-            "workspaces, 1, 3, ease"
-            "border, 1, 3, ease"
+        env = lib.mapAttrsToList (name: value: {
+          _args = [
+            name
+            value
           ];
+        }) (lib.attrByPath [ config.networking.hostName ] { } config.registry.env);
+
+        bind = lib.mapAttrsToList (_name: keybind: {
+          _args = [
+            keybind.keys
+            (lib.generators.mkLuaInline (
+              {
+                exec = "hl.dsp.exec_cmd(${lib.generators.toLua { } keybind.action.command})";
+                focus = "hl.dsp.focus(${
+                  lib.generators.toLua { } { inherit (keybind.action) direction workspace; }
+                })";
+                "move-window" = "hl.dsp.window.move(${
+                  lib.generators.toLua { } { inherit (keybind.action) direction workspace; }
+                })";
+                "resize-window" = "hl.dsp.window.resize(${
+                  lib.generators.toLua { } (
+                    {
+                      down = {
+                        x = 0;
+                        y = 10;
+                        relative = true;
+                      };
+                      left = {
+                        x = -10;
+                        y = 0;
+                        relative = true;
+                      };
+                      right = {
+                        x = 10;
+                        y = 0;
+                        relative = true;
+                      };
+                      up = {
+                        x = 0;
+                        y = -10;
+                        relative = true;
+                      };
+                    }
+                    .${keybind.action.direction}
+                  )
+                })";
+                "toggle-floating" = ''hl.dsp.window.float({ action = "toggle" })'';
+                "toggle-fullscreen" = "hl.dsp.window.fullscreen()";
+                "close-window" = "hl.dsp.window.close()";
+              }
+              .${keybind.action.kind}
+            ))
+          ]
+          ++ lib.optional keybind.repeating {
+            repeating = true;
+          }
+          ++ lib.optional keybind.locked {
+            locked = true;
+          };
+        }) (lib.attrByPath [ config.networking.hostName ] { } config.registry.keybind);
+      };
+    };
+    registry.keybind.${config.networking.hostName} = lib.mkMerge [
+      # Generate numeric workspace keybinds.
+      (lib.listToAttrs (
+        lib.concatMap (workspace: [
+          {
+            name = "hyprland-workspace-${toString workspace}";
+            value = {
+              keys = "SUPER + ${toString workspace}";
+              action = {
+                kind = "focus";
+                inherit workspace;
+              };
+            };
+          }
+          {
+            name = "hyprland-move-to-workspace-${toString workspace}";
+            value = {
+              keys = "SUPER + SHIFT + ${toString workspace}";
+              action = {
+                kind = "move-window";
+                inherit workspace;
+              };
+            };
+          }
+        ]) (lib.range 1 9)
+      ))
+
+      # Generate directional keybinds.
+      (lib.listToAttrs (
+        lib.concatMap
+          (
+            { direction, key }:
+            [
+              {
+                name = "hyprland-focus-${direction}";
+                value = {
+                  keys = "SUPER + ${key}";
+                  action = {
+                    kind = "focus";
+                    inherit direction;
+                  };
+                };
+              }
+              {
+                name = "hyprland-move-${direction}";
+                value = {
+                  keys = "SUPER + SHIFT + ${key}";
+                  action = {
+                    kind = "move-window";
+                    inherit direction;
+                  };
+                };
+              }
+              {
+                name = "hyprland-resize-${direction}";
+                value = {
+                  keys = "SUPER + ALT + ${key}";
+                  repeating = true;
+                  action = {
+                    kind = "resize-window";
+                    inherit direction;
+                  };
+                };
+              }
+            ]
+          )
+          [
+            {
+              key = "H";
+              direction = "left";
+            }
+            {
+              key = "J";
+              direction = "down";
+            }
+            {
+              key = "K";
+              direction = "up";
+            }
+            {
+              key = "L";
+              direction = "right";
+            }
+          ]
+      ))
+      {
+        hyprland-toggle-floating = {
+          keys = "SUPER + Space";
+          action.kind = "toggle-floating";
         };
 
-        dwindle = {
-          preserve_split = true;
+        hyprland-toggle-fullscreen = {
+          keys = "SUPER + F";
+          action.kind = "toggle-fullscreen";
         };
 
-        bind = [
-          "$mod, Return, exec, $terminal"
+        hyprland-close-window = {
+          keys = "SUPER + SHIFT + Q";
+          action.kind = "close-window";
+        };
+      }
+    ];
 
-          # Move focus.
-          "$mod, H, movefocus, l"
-          "$mod, J, movefocus, d"
-          "$mod, K, movefocus, u"
-          "$mod, L, movefocus, r"
-
-          # Move the window within the layout.
-          "$mod SHIFT, H, movewindow, l"
-          "$mod SHIFT, J, movewindow, d"
-          "$mod SHIFT, K, movewindow, u"
-          "$mod SHIFT, L, movewindow, r"
-
-          # Resize the active window.
-          "$mod ALT, H, resizeactive, -40 0"
-          "$mod ALT, J, resizeactive, 0 40"
-          "$mod ALT, K, resizeactive, 0 -40"
-          "$mod ALT, L, resizeactive, 40 0"
-
-          "$mod, Space, togglefloating,"
-          "$mod, F, fullscreen,"
-          # togglesplit is a dwindle layout message, reached through layoutmsg.
-          "$mod, T, layoutmsg, togglesplit"
-          "$mod SHIFT, T, exec, ${toggleLayout}"
-          "$mod SHIFT, Q, killactive,"
-          "$mod CTRL, Q, forcekillactive,"
-        ]
-        ++ workspaceBinds;
-
-        # Volume and brightness keys repeat while held, each raising a popup
-        # through the OSD client.
-        # Volume is capped at 100 percent.
-        # The client floors brightness so a full hold cannot black the screen out.
-        binde = [
-          ", XF86AudioRaiseVolume, exec, ${pkgs.swayosd}/bin/swayosd-client --output-volume raise --max-volume 100"
-          ", XF86AudioLowerVolume, exec, ${pkgs.swayosd}/bin/swayosd-client --output-volume lower"
-          ", XF86MonBrightnessUp, exec, ${pkgs.swayosd}/bin/swayosd-client --brightness raise"
-          ", XF86MonBrightnessDown, exec, ${pkgs.swayosd}/bin/swayosd-client --brightness lower"
-        ];
-
-        # Mute and media transport still fire while the session is locked.
-        bindl = [
-          ", XF86AudioMute, exec, ${pkgs.swayosd}/bin/swayosd-client --output-volume mute-toggle"
-          ", XF86AudioPlay, exec, ${pkgs.playerctl}/bin/playerctl play-pause"
-          ", XF86AudioNext, exec, ${pkgs.playerctl}/bin/playerctl next"
-          ", XF86AudioPrev, exec, ${pkgs.playerctl}/bin/playerctl previous"
-        ];
+    registry.waybar.${config.networking.hostName}."hyprland/workspaces" = {
+      position = "left";
+      order = 10;
+      settings = {
+        format = "{id} {windows}";
+        format-window-separator = " ";
+        window-rewrite-default = util.glyph "f2d0";
+        window-rewrite = lib.mapAttrs' (
+          _name: windowIcon: lib.nameValuePair "class<${windowIcon.class}>" windowIcon.icon
+        ) (lib.attrByPath [ config.networking.hostName ] { } config.registry.window-icon);
       };
     };
   };

configs/nixos/modules/desktop/session/hyprland/hypridle.nix

@@ -5,62 +5,34 @@
   ...
 }:
 # hypridle: idle-triggered locking and display power management.
-let
-  cfg = config.modules.desktop.session.hyprland.hypridle;
-  user = config.user.name;
-
-  hyprctl = "${config.programs.hyprland.package}/bin/hyprctl";
-  hyprlock = "${config.home-manager.users.${user}.programs.hyprlock.package}/bin/hyprlock";
-
-  # The guard drops the call when a locker is already up, so no idle trigger
-  # stacks a second hyprlock over the first.
-  lockCmd = "${pkgs.procps}/bin/pidof hyprlock || ${hyprlock}";
-in
 {
-  options.modules.desktop.session.hyprland.hypridle = {
-    enable = lib.mkEnableOption "hypridle idle management";
+  options.modules.desktop.session.hyprland.hypridle.enable =
+    lib.mkEnableOption "hypridle idle management";
 
-    lockTimeout = lib.mkOption {
-      type = lib.types.ints.positive;
-      default = 300;
-      description = "Seconds of inactivity before the screen locks.";
-    };
-
-    screenOffTimeout = lib.mkOption {
-      type = lib.types.ints.positive;
-      default = 360;
-      description = "Seconds of inactivity before the displays are powered off.";
-    };
-  };
-
-  config = lib.mkIf cfg.enable {
+  config = lib.mkIf config.modules.desktop.session.hyprland.hypridle.enable {
     # Closing the lid suspends, and every suspend locks first through the
     # before_sleep_cmd below, so the lid always lands at a locked screen.
     services.logind.settings.Login.HandleLidSwitch = "suspend";
 
-    home-manager.users.${user}.services.hypridle = {
+    home-manager.users.${config.user.name}.services.hypridle = {
       enable = true;
 
       settings = {
         general = {
-          lock_cmd = lockCmd;
+          # The guard drops the call when a locker is already up, so no idle
+          # trigger stacks a second hyprlock over the first.
+          lock_cmd = "${lib.getExe' pkgs.procps "pidof"} hyprlock || ${lib.getExe pkgs.hyprlock}";
           before_sleep_cmd = "loginctl lock-session";
-          # Waking restores the displays the screen-off listener may have cut.
-          after_sleep_cmd = "${hyprctl} dispatch dpms on";
+          # Waking pokes the compositor in case firmware leaves displays dark.
+          after_sleep_cmd = "${lib.getExe' config.programs.hyprland.package "hyprctl"} dispatch 'hl.dsp.dpms({ action = \"enable\" })'";
         };
 
         listener = [
           # Lock on idle.
           {
-            timeout = cfg.lockTimeout;
+            timeout = 300;
             on-timeout = "loginctl lock-session";
           }
-          # Power the displays off a little later, restoring them on any activity.
-          {
-            timeout = cfg.screenOffTimeout;
-            on-timeout = "${hyprctl} dispatch dpms off";
-            on-resume = "${hyprctl} dispatch dpms on";
-          }
         ];
       };
     };

configs/nixos/modules/desktop/session/hyprland/hyprlock.nix

@@ -2,53 +2,63 @@
   config,
   lib,
   pkgs,
+  util,
   ...
 }:
 # The lock screen: a hyprlock session-lock surface the compositor owns.
 let
-  cfg = config.modules.desktop.session.hyprland.hyprlock;
-  user = config.user.name;
-
-  # The hyprlock this module installs, used by the lock keybind below.
-  hyprlock = "${config.home-manager.users.${user}.programs.hyprlock.package}/bin/hyprlock";
-
-  sleepIcon = builtins.fromJSON ''"\udb81\udcb2"'';
-  sleepOffIcon = builtins.fromJSON ''"\udb81\udcb3"'';
+  sleepIcon = util.glyph [
+    "db81"
+    "dcb2"
+  ];
+  sleepOffIcon = util.glyph [
+    "db81"
+    "dcb3"
+  ];
 
   idleLockToggle = pkgs.writeShellScript "lockscreen-idle-inhibit-toggle" ''
     unit=lockscreen-idle-inhibit.service
 
     refresh_waybar() {
-      ${pkgs.procps}/bin/pkill -RTMIN+9 waybar >/dev/null 2>&1 || true
+      ${lib.getExe' pkgs.procps "pkill"} -RTMIN+9 waybar >/dev/null 2>&1 || true
     }
 
-    if ${pkgs.systemd}/bin/systemctl --user is-active --quiet "$unit"; then
-      ${pkgs.systemd}/bin/systemctl --user stop "$unit"
+    if ${lib.getExe' pkgs.systemd "systemctl"} --user is-active --quiet "$unit"; then
+      ${lib.getExe' pkgs.systemd "systemctl"} --user stop "$unit"
       refresh_waybar
-      ${pkgs.swayosd}/bin/swayosd-client --custom-message "${sleepIcon}"
+      ${lib.getExe' pkgs.swayosd "swayosd-client"} --custom-message "${sleepIcon}"
       exit 0
     fi
 
-    if ${pkgs.systemd}/bin/systemd-run \
+    if ${lib.getExe' pkgs.systemd "systemd-run"} \
       --user \
       --collect \
       --unit=lockscreen-idle-inhibit \
       --description="Disable idle-triggered screen locking" \
-      ${pkgs.systemd}/bin/systemd-inhibit \
+      ${lib.getExe' pkgs.systemd "systemd-inhibit"} \
       --what=idle \
       --who=lockscreen-hotkey \
       --why="lock screen disabled by hotkey" \
-      ${pkgs.coreutils}/bin/sleep infinity >/dev/null; then
+      ${lib.getExe' pkgs.coreutils "sleep"} infinity >/dev/null; then
       refresh_waybar
-      ${pkgs.swayosd}/bin/swayosd-client --custom-message "${sleepOffIcon}"
+      ${lib.getExe' pkgs.swayosd "swayosd-client"} --custom-message "${sleepOffIcon}"
+    fi
+  '';
+
+  idleLockStatus = pkgs.writeShellScript "waybar-idle-lock-status" ''
+    if ${lib.getExe' pkgs.systemd "systemctl"} --user is-active --quiet lockscreen-idle-inhibit.service; then
+      printf '{"text":"${sleepOffIcon}","tooltip":"Idle locking inhibited","class":"inhibited"}\n'
+    else
+      printf '{"text":"","class":"idle"}\n'
     fi
   '';
 in
 {
-  options.modules.desktop.session.hyprland.hyprlock.enable = lib.mkEnableOption "the hyprlock lock screen";
+  options.modules.desktop.session.hyprland.hyprlock.enable =
+    lib.mkEnableOption "the hyprlock lock screen";
 
-  config = lib.mkIf cfg.enable {
-    home-manager.users.${user} = {
+  config = lib.mkIf config.modules.desktop.session.hyprland.hyprlock.enable {
+    home-manager.users.${config.user.name} = {
       # Colors and the lock-screen background come from Stylix's hyprlock target,
       # so only geometry and behaviour are set here.
       programs.hyprlock = {
@@ -81,14 +91,36 @@ in
           };
         };
       };
+    };
 
-      # Lock on Super+X.
-      # The guard drops the keypress when a locker is already up, so a second
-      # hyprlock never stacks over the first.
-      wayland.windowManager.hyprland.settings.bind = [
-        "$mod, X, exec, ${pkgs.procps}/bin/pidof hyprlock || ${hyprlock}"
-        "$mod CTRL, X, exec, ${idleLockToggle}"
-      ];
+    registry.keybind.${config.networking.hostName} = {
+      hyprlock-lock = {
+        keys = "SUPER + X";
+        action = {
+          kind = "exec";
+          # The guard drops the call when a locker is already up, so no manual
+          # trigger stacks a second hyprlock over the first.
+          command = "${lib.getExe' pkgs.procps "pidof"} hyprlock || ${lib.getExe pkgs.hyprlock}";
+        };
+      };
+
+      hyprlock-toggle-idle-inhibit = {
+        keys = "SUPER + CTRL + X";
+        action = {
+          kind = "exec";
+          command = "${idleLockToggle}";
+        };
+      };
+    };
+
+    registry.waybar.${config.networking.hostName}."custom/idle-lock" = {
+      order = 20;
+      settings = {
+        return-type = "json";
+        exec = "${idleLockStatus}";
+        interval = "once";
+        signal = 9;
+      };
     };
   };
 }

configs/nixos/modules/desktop/session/login.nix

@@ -6,18 +6,20 @@
 }:
 # Text login: greetd running the tuigreet greeter, which starts the session
 # through the universal Wayland session manager.
-let
-  cfg = config.modules.desktop.session.login;
-in
 {
-  options.modules.desktop.session.login.enable = lib.mkEnableOption "greetd with the tuigreet text greeter";
+  options.modules.desktop.session.login.enable =
+    lib.mkEnableOption "greetd with the tuigreet text greeter";
 
-  config = lib.mkIf cfg.enable {
+  config = lib.mkIf config.modules.desktop.session.login.enable {
     services.greetd = {
       enable = true;
-      settings.default_session.command =
-        "${lib.getExe pkgs.tuigreet} --time --remember "
-        + "--cmd 'uwsm start -e -D Hyprland hyprland.desktop'";
+      settings.default_session.command = lib.escapeShellArgs [
+        (lib.getExe pkgs.tuigreet)
+        "--time"
+        "--remember"
+        "--cmd"
+        "${lib.getExe config.programs.uwsm.package} start -e -D Hyprland hyprland.desktop"
+      ];
     };
   };
 }

configs/nixos/modules/desktop/session/mako.nix

@@ -2,20 +2,29 @@
   config,
   lib,
   pkgs,
+  util,
   ...
 }:
 # mako as the notification daemon: toasts, a do-not-disturb mode, and history recall.
 let
-  cfg = config.modules.desktop.session.mako;
-  user = config.user.name;
+  dndStatus = pkgs.writeShellScript "waybar-dnd-status" ''
+    if ${lib.getExe' pkgs.mako "makoctl"} mode 2>/dev/null | ${lib.getExe pkgs.gnugrep} -qx dnd; then
+      printf '{"text":"${util.glyph "f1f6"}","tooltip":"Do not disturb: on","class":"dnd"}\n'
+    else
+      printf '{"text":"${util.glyph "f0f3"}","tooltip":"Notifications on","class":"active"}\n'
+    fi
+  '';
 
-  makoctl = "${pkgs.mako}/bin/makoctl";
+  dndToggle = pkgs.writeShellScript "waybar-dnd-toggle" ''
+    ${lib.getExe' pkgs.mako "makoctl"} mode -t dnd >/dev/null 2>&1
+    ${lib.getExe' pkgs.procps "pkill"} -RTMIN+8 waybar
+  '';
 in
 {
   options.modules.desktop.session.mako.enable = lib.mkEnableOption "the mako notification daemon";
 
-  config = lib.mkIf cfg.enable {
-    home-manager.users.${user} = {
+  config = lib.mkIf config.modules.desktop.session.mako.enable {
+    home-manager.users.${config.user.name} = {
       # Colors and the popup font come from Stylix's mako target, so only
       # behaviour is set here.
       services.mako = {
@@ -32,13 +41,25 @@ in
           "mode=dnd".invisible = true;
         };
       };
+    };
 
-      # Recall the last notification from history, keyboard-only like the rest
-      # of the session.
-      # $mod is defined by the compositor config these binds share.
-      wayland.windowManager.hyprland.settings.bind = [
-        "$mod, N, exec, ${makoctl} restore"
-      ];
+    registry.keybind.${config.networking.hostName}.mako-history = {
+      keys = "SUPER + N";
+      action = {
+        kind = "exec";
+        command = "${lib.getExe' pkgs.mako "makoctl"} restore";
+      };
+    };
+
+    registry.waybar.${config.networking.hostName}."custom/dnd" = {
+      order = 80;
+      settings = {
+        return-type = "json";
+        exec = "${dndStatus}";
+        on-click = "${dndToggle}";
+        interval = "once";
+        signal = 8;
+      };
     };
   };
 }

configs/nixos/modules/desktop/session/portals.nix

@@ -1,13 +1,10 @@
 { config, lib, ... }:
 # XDG desktop portal routing for in-app screen sharing and file dialogs.
-let
-  cfg = config.modules.desktop.session.portals;
-in
 {
   options.modules.desktop.session.portals.enable =
     lib.mkEnableOption "XDG desktop portals for in-app screen sharing and file dialogs";
 
-  config = lib.mkIf cfg.enable {
+  config = lib.mkIf config.modules.desktop.session.portals.enable {
     # The backend packages arrive with the compositor, so only the routing is set
     # here.
     # Screen sharing, screenshots, and global shortcuts need the compositor's

configs/nixos/modules/desktop/session/rofi.nix

@@ -6,47 +6,61 @@
 }:
 # rofi as the desktop launcher and dmenu-style menu frontend.
 let
-  cfg = config.modules.desktop.session.rofi;
-  user = config.user.name;
-
   # A session menu built on the same themed rofi, so the power actions look
   # like every other menu the launcher drives.
   powerMenu = pkgs.writeShellScript "rofi-power-menu" ''
     chosen=$(printf '%s\n' Lock Suspend 'Log out' Reboot 'Shut down' \
-      | ${pkgs.rofi}/bin/rofi -dmenu -i -p Power)
+      | ${lib.getExe pkgs.rofi} -dmenu -i -p Power)
     case "$chosen" in
-      Lock) ${pkgs.systemd}/bin/loginctl lock-session ;;
-      Suspend) ${pkgs.systemd}/bin/systemctl suspend ;;
-      'Log out') ${pkgs.systemd}/bin/loginctl terminate-session "$XDG_SESSION_ID" ;;
-      Reboot) ${pkgs.systemd}/bin/systemctl reboot ;;
-      'Shut down') ${pkgs.systemd}/bin/systemctl poweroff ;;
+      Lock) ${lib.getExe' pkgs.systemd "loginctl"} lock-session ;;
+      Suspend) ${lib.getExe' pkgs.systemd "systemctl"} suspend ;;
+      'Log out') ${lib.getExe' pkgs.systemd "loginctl"} terminate-session "$XDG_SESSION_ID" ;;
+      Reboot) ${lib.getExe' pkgs.systemd "systemctl"} reboot ;;
+      'Shut down') ${lib.getExe' pkgs.systemd "systemctl"} poweroff ;;
     esac
   '';
 in
 {
   options.modules.desktop.session.rofi.enable = lib.mkEnableOption "the rofi launcher";
 
-  config = lib.mkIf cfg.enable {
-    home-manager.users.${user} = {
-      # No theme is set here: Stylix's rofi target supplies the Nord one.
+  config = lib.mkIf config.modules.desktop.session.rofi.enable {
+    home-manager.users.${config.user.name} = hm: {
+      # Stylix supplies the Nord theme.
       programs.rofi = {
         enable = true;
-
         # Application launch is the only mode, kept minimal so the prompt opens
         # as fast as rofi can read the desktop entries.
         # Icons are off: resolving one per entry is the bulk of drun's startup.
-        extraConfig = {
+        settings = {
+          font = lib.mkForce "JetBrains Mono 12";
           modi = "drun";
           show-icons = false;
         };
+
+        theme.window = {
+          border = hm.config.lib.formats.rasi.mkLiteral "2px";
+          border-color = hm.config.lib.formats.rasi.mkLiteral "#FFFFFF";
+          border-radius = hm.config.lib.formats.rasi.mkLiteral "8px";
+        };
+      };
+    };
+
+    registry.keybind.${config.networking.hostName} = {
+      rofi-launcher = {
+        keys = "SUPER + R";
+        action = {
+          kind = "exec";
+          command = "${lib.getExe pkgs.rofi} -show drun";
+        };
       };
 
-      # The launcher and the session menu, kept next to the tool they drive.
-      # $mod is defined by the compositor config these binds share.
-      wayland.windowManager.hyprland.settings.bind = [
-        "$mod, R, exec, ${pkgs.rofi}/bin/rofi -show drun"
-        "$mod SHIFT, X, exec, ${powerMenu}"
-      ];
+      rofi-power-menu = {
+        keys = "SUPER + SHIFT + X";
+        action = {
+          kind = "exec";
+          command = "${powerMenu}";
+        };
+      };
     };
   };
 }

configs/nixos/modules/desktop/session/waybar.nix

@@ -6,165 +6,57 @@
 }:
 # Waybar: a top status bar reading system state at a glance.
 let
-  cfg = config.modules.desktop.session.waybar;
-  vpnClient = config.modules.network.vpn-client;
-  user = config.user.name;
+  moduleNames =
+    position:
+    map (entry: entry.name) (
+      lib.sort (left: right: left.module.order < right.module.order) (
+        lib.filter (entry: entry.module.position == position) moduleEntries
+      )
+    );
 
-  # A Nerd Font Private-Use-Area codepoint as a literal character, decoded
-  # through JSON so the glyph survives as bytes rather than an editor paste.
-  g = code: builtins.fromJSON ''"\u${code}"'';
-  sleepOffIcon = builtins.fromJSON ''"\udb81\udcb3"'';
+  moduleEntries = lib.mapAttrsToList (name: module: {
+    inherit name module;
+  }) modules;
 
-  # Renders and toggles mako's do-not-disturb mode.
-  # With no mako daemon answering, the status reads "notifications on", keeping
-  # the widget inert rather than broken.
-  dndStatus = pkgs.writeShellScript "waybar-dnd-status" ''
-    if ${pkgs.mako}/bin/makoctl mode 2>/dev/null | ${pkgs.gnugrep}/bin/grep -qx dnd; then
-      printf '{"text":"${g "f1f6"}","tooltip":"Do not disturb: on","class":"dnd"}\n'
-    else
-      printf '{"text":"${g "f0f3"}","tooltip":"Notifications on","class":"active"}\n'
-    fi
-  '';
-
-  dndToggle = pkgs.writeShellScript "waybar-dnd-toggle" ''
-    ${pkgs.mako}/bin/makoctl mode -t dnd >/dev/null 2>&1
-    ${pkgs.procps}/bin/pkill -RTMIN+8 waybar
-  '';
-
-  # Lit while a wf-recorder capture is running.
-  # Empty text collapses the widget when idle, so it shows nothing until then.
-  recStatus = pkgs.writeShellScript "waybar-recording-status" ''
-    if ${pkgs.procps}/bin/pgrep -x wf-recorder >/dev/null; then
-      printf '{"text":"${g "f03d"}","tooltip":"Recording","class":"recording"}\n'
-    else
-      printf '{"text":"","class":"idle"}\n'
-    fi
-  '';
-
-  idleLockStatus = pkgs.writeShellScript "waybar-idle-lock-status" ''
-    if ${pkgs.systemd}/bin/systemctl --user is-active --quiet lockscreen-idle-inhibit.service; then
-      printf '{"text":"${sleepOffIcon}","tooltip":"Idle locking inhibited","class":"inhibited"}\n'
-    else
-      printf '{"text":"","class":"idle"}\n'
-    fi
-  '';
-
-  vpnStatus = pkgs.writeShellScript "waybar-vpn-status" ''
-    interface=${lib.escapeShellArg vpnClient.interface}
-
-    if ! ${pkgs.iproute2}/bin/ip link show dev "$interface" >/dev/null 2>&1; then
-      printf '{"text":"","class":"idle"}\n'
-      exit 0
-    fi
-
-    ipaddr=$(${pkgs.iproute2}/bin/ip -4 -o addr show dev "$interface" | ${pkgs.gawk}/bin/awk '{ print $4; exit }')
-
-    ${pkgs.jq}/bin/jq -cn \
-      --arg text "󰲝" \
-      --arg tooltip "VPN $interface: ''${ipaddr:-no IPv4}" \
-      --arg class "active" \
-      '{ text: $text, tooltip: $tooltip, class: $class }'
-  '';
-
-  networkStatus = pkgs.writeShellScript "waybar-network-status" ''
-    active=$(
-      ${pkgs.networkmanager}/bin/nmcli -t -f DEVICE,TYPE,STATE,CONNECTION device status \
-        | ${pkgs.gawk}/bin/awk -F: '$3 == "connected" && $2 != "loopback" { print; exit }'
-    )
-
-    if [ -z "$active" ]; then
-      ${pkgs.jq}/bin/jq -cn \
-        --arg text "${g "f127"} off" \
-        --arg tooltip "Network disconnected" \
-        --arg class "disconnected" \
-        '{ text: $text, tooltip: $tooltip, class: $class }'
-      exit 0
-    fi
-
-    IFS=: read -r device type _state connection <<< "$active"
-
-    case "$type" in
-      wifi) icon="${g "f1eb"}" ;;
-      ethernet) icon="LAN" ;;
-      *) icon="NET" ;;
-    esac
-
-    ipaddr=$(${pkgs.iproute2}/bin/ip -4 -o addr show dev "$device" | ${pkgs.gawk}/bin/awk '{ print $4; exit }')
-
-    ${pkgs.jq}/bin/jq -cn \
-      --arg text "$icon $connection" \
-      --arg tooltip "$device: ''${ipaddr:-no IPv4}" \
-      --arg class "$type" \
-      '{ text: $text, tooltip: $tooltip, class: $class }'
-  '';
+  modules = lib.attrByPath [ config.networking.hostName ] { } config.registry.waybar;
 in
 {
   options.modules.desktop.session.waybar.enable = lib.mkEnableOption "the Waybar status bar";
 
-  config = lib.mkIf cfg.enable {
+  config = lib.mkIf config.modules.desktop.session.waybar.enable {
     # A symbols font backs the module glyphs, so pango falls back to it for the
     # codepoints Stylix's monospace font does not carry.
     fonts.packages = [ pkgs.nerd-fonts.symbols-only ];
 
-    home-manager.users.${user}.programs.waybar = {
+    home-manager.users.${config.user.name}.programs.waybar = {
       enable = true;
+      package = pkgs.alexion.waybar;
 
       # A user service bound to graphical-session.target, which uwsm activates,
       # so the bar comes up with the session and no compositor exec-once.
       systemd.enable = true;
 
-      style = ''
-        .modules-right {
-          margin-right: 8px;
+      settings.mainBar = lib.mkMerge [
+        {
+          layer = "top";
+          position = "top";
+          height = 30;
+          spacing = 8;
+          margin-right = 8;
+
+          modules-left = moduleNames "left";
+          modules-center = moduleNames "center";
+          modules-right = moduleNames "right";
         }
+        (lib.mapAttrs (_name: module: module.settings) modules)
+      ];
+    };
 
-        #custom-dnd {
-          margin-right: 8px;
-        }
-      '';
-
-      settings.mainBar = {
-        layer = "top";
-        position = "top";
-        height = 30;
-        spacing = 8;
-
-        modules-left = [ "hyprland/workspaces" ];
-        modules-center = [ "clock" ];
-        modules-right = [
-          "custom/recording"
-          "custom/idle-lock"
-          "mpris"
-          "wireplumber"
-        ]
-        ++ lib.optional vpnClient.enable "custom/vpn"
-        ++ [
-          "custom/network"
-          "battery"
-          "custom/dnd"
-        ];
-
-        # Per-application icons for the windows on each workspace, mapped from
-        # window class with a neutral glyph for anything unlisted.
-        "hyprland/workspaces" = {
-          on-click = "activate";
-          format = "{id} {windows}";
-          format-window-separator = " ";
-          window-rewrite-default = g "f2d0";
-          window-rewrite = {
-            "class<Alacritty>" = g "f120";
-            "class<com.mitchellh.ghostty>" = g "f120";
-            "class<.*[Ff]irefox.*>" = g "f269";
-            "class<chromium.*>" = g "f268";
-            "class<[Cc]ode>" = g "f121";
-            "class<obsidian>" = g "f02d";
-            "class<[Ss]ignal>" = g "f4ad";
-            "class<[Ss]team>" = g "f1b6";
-            "class<[Vv]esktop>" = g "f1ff";
-          };
-        };
-
-        clock = {
+    registry.waybar.${config.networking.hostName} = {
+      clock = {
+        position = "center";
+        order = 10;
+        settings = {
           format = "{:%a %d %b  %H:%M}";
           tooltip-format = "<tt>{calendar}</tt>";
           calendar = {
@@ -173,77 +65,6 @@ in
             format.today = "<b><u>{}</u></b>";
           };
         };
-
-        mpris = {
-          format = "${g "f001"} {title}";
-          format-paused = "${g "f04c"} {title}";
-          max-length = 40;
-          on-click = "play-pause";
-          on-scroll-up = "next";
-          on-scroll-down = "previous";
-        };
-
-        wireplumber = {
-          format = "{icon} {volume}%";
-          format-muted = "${g "f026"} muted";
-          format-icons = [
-            (g "f026")
-            (g "f027")
-            (g "f028")
-          ];
-          on-click = "${pkgs.wireplumber}/bin/wpctl set-mute @DEFAULT_AUDIO_SINK@ toggle";
-        };
-
-        "custom/vpn" = {
-          return-type = "json";
-          exec = "${vpnStatus}";
-          interval = 5;
-        };
-
-        "custom/network" = {
-          return-type = "json";
-          exec = "${networkStatus}";
-          interval = 5;
-        };
-
-        battery = {
-          format = "{icon} {capacity}%";
-          format-charging = "${g "f0e7"} {capacity}%";
-          format-icons = [
-            (g "f244")
-            (g "f243")
-            (g "f242")
-            (g "f241")
-            (g "f240")
-          ];
-          states = {
-            warning = 20;
-            critical = 10;
-          };
-        };
-
-        "custom/dnd" = {
-          return-type = "json";
-          exec = "${dndStatus}";
-          on-click = "${dndToggle}";
-          interval = "once";
-          signal = 8;
-        };
-
-        # Recording state has no event to hook, so the widget samples the
-        # wf-recorder process once a second.
-        "custom/recording" = {
-          return-type = "json";
-          exec = "${recStatus}";
-          interval = 1;
-        };
-
-        "custom/idle-lock" = {
-          return-type = "json";
-          exec = "${idleLockStatus}";
-          interval = "once";
-          signal = 9;
-        };
       };
     };
   };

configs/nixos/modules/desktop/utilities/audio.nix

@@ -1,12 +1,34 @@
-{ config, lib, ... }:
+{
+  config,
+  lib,
+  pkgs,
+  util,
+  ...
+}:
 # PipeWire as the desktop audio server.
 let
-  cfg = config.modules.desktop.utilities.audio;
+  volumeKey = keys: command: {
+    inherit keys;
+    repeating = true;
+    action = {
+      kind = "exec";
+      command = "${lib.getExe' pkgs.swayosd "swayosd-client"} --output-volume ${command}";
+    };
+  };
+
+  mediaKey = keys: command: {
+    inherit keys;
+    locked = true;
+    action = {
+      kind = "exec";
+      command = "${lib.getExe pkgs.playerctl} ${command}";
+    };
+  };
 in
 {
   options.modules.desktop.utilities.audio.enable = lib.mkEnableOption "the PipeWire audio server";
 
-  config = lib.mkIf cfg.enable {
+  config = lib.mkIf config.modules.desktop.utilities.audio.enable {
     # Realtime scheduling for the audio threads, so playback survives load.
     security.rtkit.enable = true;
 
@@ -15,5 +37,50 @@ in
       alsa.enable = true;
       pulse.enable = true;
     };
+
+    registry.keybind.${config.networking.hostName} = {
+      volume-up = volumeKey "XF86AudioRaiseVolume" "raise --max-volume 100";
+      volume-down = volumeKey "XF86AudioLowerVolume" "lower";
+      mute = {
+        keys = "XF86AudioMute";
+        locked = true;
+        action = {
+          kind = "exec";
+          command = "${lib.getExe' pkgs.swayosd "swayosd-client"} --output-volume mute-toggle";
+        };
+      };
+
+      media-play = mediaKey "XF86AudioPlay" "play-pause";
+      media-next = mediaKey "XF86AudioNext" "next";
+      media-previous = mediaKey "XF86AudioPrev" "previous";
+    };
+
+    registry.waybar.${config.networking.hostName} = {
+      mpris = {
+        order = 30;
+        settings = {
+          format = "${util.glyph "f001"} {title}";
+          format-paused = "${util.glyph "f04c"} {title}";
+          max-length = 40;
+          on-click = "play-pause";
+          on-scroll-up = "next";
+          on-scroll-down = "previous";
+        };
+      };
+
+      wireplumber = {
+        order = 40;
+        settings = {
+          format = "{icon} {volume}%";
+          format-muted = "${util.glyph "f026"} muted";
+          format-icons = [
+            (util.glyph "f026")
+            (util.glyph "f027")
+            (util.glyph "f028")
+          ];
+          on-click = "${lib.getExe' pkgs.wireplumber "wpctl"} set-mute @DEFAULT_AUDIO_SINK@ toggle";
+        };
+      };
+    };
   };
 }

configs/nixos/modules/desktop/utilities/clipboard.nix

@@ -6,29 +6,23 @@
 }:
 # Clipboard history: cliphist records every copy, picked back through rofi.
 let
-  cfg = config.modules.desktop.utilities.clipboard;
-  user = config.user.name;
-
-  cliphist = "${pkgs.cliphist}/bin/cliphist";
-  rofi = "${pkgs.rofi}/bin/rofi";
-  wl-copy = "${pkgs.wl-clipboard}/bin/wl-copy";
-
   # The picker reuses the themed rofi, so history looks like every other menu
   # the launcher drives.
   # decode is needed because list emits id-prefixed lines rather than the copied
   # bytes, so the chosen id has to be resolved back before it can be re-copied.
   picker = pkgs.writeShellScript "clipboard-picker" ''
-    ${cliphist} list \
-      | ${rofi} -dmenu -i -p Clipboard \
-      | ${cliphist} decode \
-      | ${wl-copy}
+    ${lib.getExe pkgs.cliphist} list \
+      | ${lib.getExe pkgs.rofi} -dmenu -i -p Clipboard \
+      | ${lib.getExe pkgs.cliphist} decode \
+      | ${lib.getExe' pkgs.wl-clipboard "wl-copy"}
   '';
 in
 {
-  options.modules.desktop.utilities.clipboard.enable = lib.mkEnableOption "cliphist clipboard history";
+  options.modules.desktop.utilities.clipboard.enable =
+    lib.mkEnableOption "cliphist clipboard history";
 
-  config = lib.mkIf cfg.enable {
-    home-manager.users.${user} = {
+  config = lib.mkIf config.modules.desktop.utilities.clipboard.enable {
+    home-manager.users.${config.user.name} = {
       # wl-copy and wl-paste on PATH, so the shell can pipe into and out of the
       # clipboard.
       # The watchers and picker above reach wl-clipboard by store path, so this
@@ -38,11 +32,14 @@ in
       # Two watchers record text and images to history, bound to the graphical
       # session so uwsm starts and stops them with it.
       services.cliphist.enable = true;
+    };
 
-      # $mod is defined by the compositor config these binds share.
-      wayland.windowManager.hyprland.settings.bind = [
-        "$mod SHIFT, V, exec, ${picker}"
-      ];
+    registry.keybind.${config.networking.hostName}.clipboard-history = {
+      keys = "SUPER + SHIFT + V";
+      action = {
+        kind = "exec";
+        command = "${picker}";
+      };
     };
   };
 }

configs/nixos/modules/desktop/utilities/osd.nix

@@ -5,35 +5,52 @@
   ...
 }:
 # SwayOSD: a transient on-screen popup for volume and brightness changes.
-let
-  cfg = config.modules.desktop.utilities.osd;
-  user = config.user.name;
-in
 {
-  options.modules.desktop.utilities.osd.enable = lib.mkEnableOption "the SwayOSD volume and brightness popup";
+  options.modules.desktop.utilities.osd.enable =
+    lib.mkEnableOption "the SwayOSD volume and brightness popup";
 
-  config = lib.mkIf cfg.enable {
+  config = lib.mkIf config.modules.desktop.utilities.osd.enable {
     environment.systemPackages = [ pkgs.swayosd ];
 
     # The udev rule chgrps each backlight's brightness node to `video` and adds
     # group write, so the server dims the panel without root.
     # Membership below grants the running session that access.
     services.udev.packages = [ pkgs.swayosd ];
-    users.users.${user}.extraGroups = [ "video" ];
+    users.users.${config.user.name}.extraGroups = [ "video" ];
 
     # The server draws the popups, so it runs for the whole graphical session.
     # It binds to the target uwsm activates.
-    home-manager.users.${user}.systemd.user.services.swayosd = {
+    home-manager.users.${config.user.name}.systemd.user.services.swayosd = {
       Unit = {
         Description = "SwayOSD on-screen display server";
         PartOf = [ "graphical-session.target" ];
         After = [ "graphical-session.target" ];
       };
       Service = {
-        ExecStart = "${pkgs.swayosd}/bin/swayosd-server";
+        ExecStart = lib.getExe' pkgs.swayosd "swayosd-server";
         Restart = "on-failure";
       };
       Install.WantedBy = [ "graphical-session.target" ];
     };
+
+    registry.keybind.${config.networking.hostName} = {
+      brightness-up = {
+        keys = "XF86MonBrightnessUp";
+        repeating = true;
+        action = {
+          kind = "exec";
+          command = "${lib.getExe' pkgs.swayosd "swayosd-client"} --brightness raise";
+        };
+      };
+
+      brightness-down = {
+        keys = "XF86MonBrightnessDown";
+        repeating = true;
+        action = {
+          kind = "exec";
+          command = "${lib.getExe' pkgs.swayosd "swayosd-client"} --brightness lower";
+        };
+      };
+    };
   };
 }

configs/nixos/modules/desktop/utilities/recording.nix

@@ -2,53 +2,67 @@
   config,
   lib,
   pkgs,
+  util,
   ...
 }:
 # Keybound screen recording: pick a region, then toggle a video-only capture.
 let
-  cfg = config.modules.desktop.utilities.recording;
-  user = config.user.name;
+  # A single key starts and stops recording.
+  # Waybar refreshes on state changes instead of polling.
+  recordingToggle = pkgs.writeShellScript "screen-record-toggle" ''
+    refresh_waybar() {
+      ${lib.getExe' pkgs.procps "pkill"} -RTMIN+10 waybar >/dev/null 2>&1 || true
+    }
 
-  slurp = "${pkgs.slurp}/bin/slurp";
-  wf-recorder = "${pkgs.wf-recorder}/bin/wf-recorder";
-  notify-send = "${pkgs.libnotify}/bin/notify-send";
-  pgrep = "${pkgs.procps}/bin/pgrep";
-  pkill = "${pkgs.procps}/bin/pkill";
-  date = "${pkgs.coreutils}/bin/date";
-  mkdir = "${pkgs.coreutils}/bin/mkdir";
-  xdgUserDir = "${pkgs.xdg-user-dirs}/bin/xdg-user-dir";
-
-  # A single key both starts and stops.
-  # A running wf-recorder is stopped with SIGINT so it finalises the file.
-  # Otherwise slurp picks a region and wf-recorder runs in the foreground until
-  # that stop arrives, so this instance lives for the whole recording and then
-  # reports it saved.
-  # No -a means no audio is captured.
-  toggle = pkgs.writeShellScript "screen-record-toggle" ''
-    if ${pgrep} -x wf-recorder >/dev/null; then
-      ${pkill} -INT -x wf-recorder
+    if ${lib.getExe' pkgs.procps "pgrep"} -x wf-recorder >/dev/null; then
+      ${lib.getExe' pkgs.procps "pkill"} -INT -x wf-recorder
       exit 0
     fi
 
-    region=$(${slurp}) || exit 0
-    dir="$(${xdgUserDir} VIDEOS)/Recordings"
-    ${mkdir} -p "$dir"
-    file="$dir/recording-$(${date} +%Y%m%d-%H%M%S).mp4"
+    region=$(${lib.getExe pkgs.slurp}) || exit 0
+    dir="$(${lib.getExe' pkgs.xdg-user-dirs "xdg-user-dir"} VIDEOS)/Recordings"
+    ${lib.getExe' pkgs.coreutils "mkdir"} -p "$dir"
+    file="$dir/recording-$(${lib.getExe' pkgs.coreutils "date"} +%Y%m%d-%H%M%S).mp4"
 
-    ${notify-send} -a "Screen recording" "Recording started" "Region capture, no audio."
-    ${wf-recorder} -g "$region" -f "$file"
-    ${notify-send} -a "Screen recording" "Recording saved" "$file"
+    ${lib.getExe' pkgs.libnotify "notify-send"} -a "Screen recording" "Recording started" "Region capture, no audio."
+    ${lib.getExe pkgs.wf-recorder} -g "$region" -f "$file" &
+    recorder=$!
+    refresh_waybar
+    wait "$recorder" || true
+    refresh_waybar
+    ${lib.getExe' pkgs.libnotify "notify-send"} -a "Screen recording" "Recording saved" "$file"
+  '';
+
+  # Empty text collapses the widget when recording is idle.
+  recordingStatus = pkgs.writeShellScript "waybar-recording-status" ''
+    if ${lib.getExe' pkgs.procps "pgrep"} -x wf-recorder >/dev/null; then
+      printf '{"text":"${util.glyph "f03d"}","tooltip":"Recording","class":"recording"}\n'
+    else
+      printf '{"text":"","class":"idle"}\n'
+    fi
   '';
 in
 {
-  options.modules.desktop.utilities.recording.enable = lib.mkEnableOption "wf-recorder screen recording";
+  options.modules.desktop.utilities.recording.enable =
+    lib.mkEnableOption "wf-recorder screen recording";
 
-  config = lib.mkIf cfg.enable {
-    home-manager.users.${user} = {
-      # $mod is defined by the compositor config these binds share.
-      wayland.windowManager.hyprland.settings.bind = [
-        "$mod SHIFT, R, exec, ${toggle}"
-      ];
+  config = lib.mkIf config.modules.desktop.utilities.recording.enable {
+    registry.keybind.${config.networking.hostName}.recording-toggle = {
+      keys = "SUPER + SHIFT + R";
+      action = {
+        kind = "exec";
+        command = "${recordingToggle}";
+      };
+    };
+
+    registry.waybar.${config.networking.hostName}."custom/recording" = {
+      order = 10;
+      settings = {
+        return-type = "json";
+        exec = "${recordingStatus}";
+        interval = "once";
+        signal = 10;
+      };
     };
   };
 }

configs/nixos/modules/desktop/utilities/screenshot.nix

@@ -4,54 +4,54 @@
   pkgs,
   ...
 }:
-# Keyboard-driven screenshots that open in satty for annotation, then land in
-# both the clipboard and a dated file.
+# Keyboard-driven screenshots copy to the clipboard before Satty opens for
+# annotation. Satty copies annotated screenshots when it saves them.
 let
-  cfg = config.modules.desktop.utilities.screenshot;
-  user = config.user.name;
+  screenshotKey = keys: target: {
+    inherit keys;
+    action = {
+      kind = "exec";
+      command = "${capture target}";
+    };
+  };
 
-  grimblast = "${pkgs.grimblast}/bin/grimblast";
-  satty = "${pkgs.satty}/bin/satty";
-  wl-copy = "${pkgs.wl-clipboard}/bin/wl-copy";
-  xdgUserDir = "${pkgs.xdg-user-dirs}/bin/xdg-user-dir";
-
-  # satty's copy action also saves, so one keystroke lands the shot in both the
-  # clipboard and a file.
+  # Copy the original screenshot before Satty opens.
+  # Satty copies and saves annotated screenshots when the user presses Enter.
   capture =
     target:
     pkgs.writeShellScript "screenshot-${target}" ''
-      dir="$(${xdgUserDir} PICTURES)/Screenshots"
-      mkdir -p "$dir"
-      ${grimblast} save ${target} - \
-        | ${satty} --filename - \
+      dir="$(${lib.getExe' pkgs.xdg-user-dirs "xdg-user-dir"} PICTURES)/Screenshots"
+      ${lib.getExe' pkgs.coreutils "mkdir"} -p "$dir"
+      ${lib.getExe pkgs.grimblast} save ${target} - \
+        | ${lib.getExe' pkgs.coreutils "tee"} >(${lib.getExe' pkgs.wl-clipboard "wl-copy"}) \
+        | ${lib.getExe pkgs.satty} --filename - \
           --output-filename "$dir/screenshot-%Y%m%d-%H%M%S.png" \
-          --copy-command ${wl-copy} \
+          --copy-command ${lib.getExe' pkgs.wl-clipboard "wl-copy"} \
           --save-after-copy \
           --early-exit \
           --actions-on-enter save-to-clipboard
     '';
 in
 {
-  options.modules.desktop.utilities.screenshot.enable = lib.mkEnableOption "screenshots via grimblast and satty";
+  options.modules.desktop.utilities.screenshot.enable =
+    lib.mkEnableOption "screenshots via grimblast and satty";
 
-  config = lib.mkIf cfg.enable {
-    home-manager.users.${user} = {
+  config = lib.mkIf config.modules.desktop.utilities.screenshot.enable {
+    home-manager.users.${config.user.name} = {
       # satty is a one-shot annotation surface, so float it rather than letting
       # it claim a tile in the layout.
-      # windowrule v3 syntax: space-separated field/value tokens, comma
-      # separated, with matchers under a match: prefix and effects bare.
-      wayland.windowManager.hyprland.settings.windowrule = [
-        "float 1, match:class ^(com\\.gabm\\.satty)$"
+      wayland.windowManager.hyprland.settings.window_rule = [
+        {
+          match.class = "^(com\\.gabm\\.satty)$";
+          float = true;
+        }
       ];
+    };
 
-      # Print with plain/Shift/Ctrl for region/window/full.
-      # Super+L is already the hjkl focus and movement bind, so screenshots take
-      # the Print key instead.
-      wayland.windowManager.hyprland.settings.bind = [
-        ", Print, exec, ${capture "area"}"
-        "SHIFT, Print, exec, ${capture "active"}"
-        "CTRL, Print, exec, ${capture "screen"}"
-      ];
+    registry.keybind.${config.networking.hostName} = {
+      screenshot-area = screenshotKey "Print" "area";
+      screenshot-active = screenshotKey "SHIFT + Print" "active";
+      screenshot-screen = screenshotKey "CTRL + Print" "screen";
     };
   };
 }

configs/nixos/modules/desktop/utilities/theming.nix

@@ -6,13 +6,10 @@
 }:
 # Nord theming for the graphical layer, driven from one base16 scheme by Stylix.
 let
-  cfg = config.modules.desktop.utilities.theming;
-  user = config.user.name;
-
   # A single static Nord wallpaper, drawn as a vertical gradient across the
   # Polar Night shades so it needs no committed binary and no network fetch.
   wallpaper = pkgs.runCommand "nord-wallpaper.png" { } ''
-    ${pkgs.imagemagick}/bin/magick \
+    ${lib.getExe pkgs.imagemagick} \
       -size 2560x1440 gradient:'#2E3440'-'#3B4252' \
       "$out"
   '';
@@ -21,7 +18,7 @@ in
   options.modules.desktop.utilities.theming.enable =
     lib.mkEnableOption "Nord theming of the graphical layer via Stylix";
 
-  config = lib.mkIf cfg.enable {
+  config = lib.mkIf config.modules.desktop.utilities.theming.enable {
     stylix = {
       enable = true;
 
@@ -60,7 +57,7 @@ in
       };
     };
 
-    home-manager.users.${user} = {
+    home-manager.users.${config.user.name} = {
       # Stylix drives the cursor through home-manager's pointer-cursor config,
       # whose generation must be switched on explicitly.
       home.pointerCursor.enable = true;
@@ -69,5 +66,10 @@ in
       # base16 mapping Stylix would apply, so its target stays off.
       stylix.targets.nixvim.enable = false;
     };
+
+    registry.env.${config.networking.hostName} = {
+      HYPRCURSOR_THEME = config.stylix.cursor.name;
+      HYPRCURSOR_SIZE = toString config.stylix.cursor.size;
+    };
   };
 }

configs/nixos/modules/desktop/utilities/userdirs.nix

@@ -1,15 +1,27 @@
 { config, lib, ... }:
-# Declares the XDG user directories, so a tool that queries them lands in a
-# well-known folder a host can relocate from one place.
+# Declares XDG user directories, so tools that query them use predictable
+# folders a host can relocate from one place.
 let
-  cfg = config.modules.desktop.utilities.userdirs;
-  user = config.user.name;
+  homeDirectory = "/home/${config.user.name}";
 in
 {
   options.modules.desktop.utilities.userdirs.enable = lib.mkEnableOption "XDG user directories";
 
-  config = lib.mkIf cfg.enable {
-    # Write ~/.config/user-dirs.dirs from the option defaults.
-    home-manager.users.${user}.xdg.userDirs.enable = true;
+  config = lib.mkIf config.modules.desktop.utilities.userdirs.enable {
+    home-manager.users.${config.user.name}.xdg.userDirs = {
+      enable = true;
+      createDirectories = true;
+      setSessionVariables = true;
+
+      desktop = "${homeDirectory}/.ignoreme";
+      documents = "${homeDirectory}/docs";
+      download = "${homeDirectory}/dwn";
+      music = "${homeDirectory}/mus";
+      pictures = "${homeDirectory}/pic";
+      publicShare = "${homeDirectory}/.ignoreme";
+      templates = "${homeDirectory}/.ignoreme";
+      videos = "${homeDirectory}/vid";
+      projects = "${homeDirectory}/.ignoreme";
+    };
   };
 }

configs/nixos/modules/guest.nix

@@ -1,14 +1,9 @@
 { config, lib, ... }:
-let
-  cfg = config.modules.guest;
-in
 {
-  options.modules.guest.enable = lib.mkEnableOption "nested-guest base configuration";
+  options.modules.guest.enable = lib.mkEnableOption "nested guest configuration";
 
-  config = lib.mkIf cfg.enable {
-    system.stateVersion = "26.05";
-
-    modules.network.ssh.enable = lib.mkDefault true;
+  config = lib.mkIf config.modules.guest.enable {
+    modules.network.ssh.enable = lib.mkDefault false;
     modules.network.ssh.hostKeys.restore = lib.mkDefault false;
   };
 }

configs/nixos/modules/host.nix

@@ -1,42 +0,0 @@
-{
-  config,
-  lib,
-  ...
-}:
-let
-  cfg = config.modules.host;
-  user = config.user;
-  passwordSecret = "${user.name}-password";
-in
-{
-  options.modules.host.enable = lib.mkEnableOption "physical-host base configuration";
-
-  config = lib.mkIf cfg.enable {
-    nix.settings.extra-substituters = [ "https://nyx-cache.chaotic.cx/" ];
-    nix.settings.extra-trusted-public-keys = [
-      "nyx-cache.chaotic.cx:dJxTrgMC3V3cFfyIiBQDQorG6k1LsqurH/srpMSq7qk="
-    ];
-
-    nix.gc.automatic = true;
-    nix.gc.dates = "Mon 03:15";
-    nix.gc.options = "--delete-older-than 30d";
-
-    nix.optimise.automatic = true;
-    nix.optimise.dates = [ "Thu 03:45" ];
-
-    boot.loader.systemd-boot.configurationLimit = 15;
-
-    services.xserver.xkb.layout = "us";
-    services.xserver.xkb.options = "caps:escape_shifted_capslock";
-    console.useXkbConfig = true;
-
-    sops.defaultSopsFile = ../secrets/shared.yaml;
-    sops.age.keyFile = "/var/lib/sops-nix/key.txt";
-    sops.age.sshKeyPaths = [ ];
-    sops.gnupg.sshKeyPaths = [ ];
-
-    users.mutableUsers = false;
-    sops.secrets.${passwordSecret}.neededForUsers = true;
-    users.users.${user.name}.hashedPasswordFile = config.sops.secrets.${passwordSecret}.path;
-  };
-}

configs/nixos/modules/host/cachyos.nix

@@ -0,0 +1,18 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+{
+  options.modules.host.cachyos.enable = lib.mkEnableOption "the CachyOS kernel";
+
+  config = lib.mkIf config.modules.host.cachyos.enable {
+    boot.kernelPackages = pkgs.linuxPackages_cachyos;
+
+    nix.settings.extra-substituters = [ "https://nyx-cache.chaotic.cx/" ];
+    nix.settings.extra-trusted-public-keys = [
+      "nyx-cache.chaotic.cx:dJxTrgMC3V3cFfyIiBQDQorG6k1LsqurH/srpMSq7qk="
+    ];
+  };
+}

configs/nixos/modules/host/default.nix

@@ -0,0 +1,106 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+let
+  hostSecrets = ../../secrets + "/${config.networking.hostName}.yaml";
+in
+{
+  options.modules.host.enable = lib.mkEnableOption "physical host configuration";
+
+  config = lib.mkIf config.modules.host.enable {
+    nix.gc.automatic = true;
+    nix.gc.dates = "Mon 03:15";
+    nix.gc.options = "--delete-older-than 30d";
+
+    nix.optimise.automatic = true;
+    nix.optimise.dates = [ "Thu 03:45" ];
+
+    boot.loader.systemd-boot.enable = true;
+    boot.loader.systemd-boot.configurationLimit = 15;
+    boot.loader.efi.canTouchEfiVariables = true;
+
+    hardware.enableRedistributableFirmware = true;
+    zramSwap.enable = true;
+
+    modules.network.ssh.enable = true;
+    modules.network.ssh.hostKeys.sopsFile = hostSecrets;
+    modules.network.ssh.userKey.sopsFile = hostSecrets;
+
+    services.xserver.xkb.layout = "us";
+    console.useXkbConfig = true;
+
+    sops.defaultSopsFile = ../../secrets/shared.yaml;
+    sops.age.keyFile = "/var/lib/sops-nix/key.txt";
+    sops.age.sshKeyPaths = [ ];
+    sops.gnupg.sshKeyPaths = [ ];
+
+    users.mutableUsers = false;
+    sops.secrets."${config.user.name}-password".neededForUsers = true;
+    users.users.${config.user.name}.hashedPasswordFile =
+      config.sops.secrets."${config.user.name}-password".path;
+
+    security.sudo.extraConfig = ''
+      Defaults env_keep += "EDITOR VISUAL"
+    '';
+
+    home-manager = {
+      useGlobalPkgs = true;
+      useUserPackages = true;
+      users.${config.user.name} = {
+        home.username = config.user.name;
+        home.homeDirectory = "/home/${config.user.name}";
+        home.stateVersion = config.system.stateVersion;
+        home.sessionVariables = lib.attrByPath [ config.networking.hostName ] { } config.registry.env;
+        home.packages = with pkgs; [
+          eza
+          unzip
+          wget
+        ];
+      };
+    };
+
+    registry.shell-shortcut.${config.networking.hostName} = {
+      ls = {
+        command = "eza -alg --color=always --group-directories-first --icons=always";
+        abbreviation = false;
+      };
+      ll = {
+        command = "eza -lg --color=always --group-directories-first --icons=always";
+        abbreviation = false;
+      };
+      lt = {
+        command = "eza -aT -I '.git' --color=always --group-directories-first --icons=always";
+        abbreviation = false;
+      };
+      ".." = "cd ..";
+      "..." = "cd ../..";
+      "...." = "cd ../../..";
+
+      cp = "cp -v";
+      tarnow = "tar -acf ";
+      untar = "tar -zxvf ";
+      wget = "wget -c ";
+      grep = "grep --color=auto";
+      fgrep = "fgrep --color=auto";
+      egrep = "egrep --color=auto";
+      jctl = "journalctl -p 3 -xb";
+
+      update = "sudo nixos-rebuild switch --flake .#${config.networking.hostName}";
+      cleanup = "sudo nix-collect-garbage -d";
+      sops-host = {
+        command = "sudo --preserve-env=EDITOR,VISUAL env SOPS_AGE_KEY_FILE=/var/lib/sops-nix/key.txt nix shell nixpkgs#sops nixpkgs#neovim -c sops";
+        abbreviation = false;
+      };
+    };
+
+    modules.shell.fish.enable = lib.mkDefault true;
+    modules.shell.fish.defaultShell = lib.mkDefault true;
+    modules.shell.tmux.enable = lib.mkDefault true;
+    modules.shell.nvim.enable = lib.mkDefault true;
+    modules.shell.git.enable = lib.mkDefault true;
+    modules.shell.yazi.enable = lib.mkDefault true;
+  };
+}

configs/nixos/modules/host/zfs.nix

@@ -0,0 +1,57 @@
+{
+  config,
+  lib,
+  ...
+}:
+# Imports existing ZFS pools that hold durable service state.
+let
+  cfg = config.modules.host.zfs;
+in
+{
+  options.modules.host.zfs = {
+    enable = lib.mkEnableOption "ZFS pool imports for durable service state";
+
+    pools = lib.mkOption {
+      type = lib.types.attrsOf (lib.types.attrsOf lib.types.path);
+      default = { };
+      example = lib.literalExpression ''
+        {
+          tank = {
+            media = "/srv/media";
+            downloads = "/srv/downloads";
+          };
+        }
+      '';
+      description = ''
+        Lists pools that NixOS imports at boot.
+        Maps each dataset name to its mount point.
+        NixOS does not create or destroy these pools during rebuilds.
+        An empty map imports the pool without declaring file systems.
+      '';
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    boot.supportedFilesystems = [ "zfs" ];
+
+    # This module derives a stable host ID from the configured hostname.
+    networking.hostId = builtins.substring 0 8 (
+      builtins.hashString "sha256" config.networking.hostName
+    );
+
+    boot.zfs.extraPools = lib.attrNames cfg.pools;
+
+    fileSystems = lib.mkMerge (
+      lib.mapAttrsToList (
+        pool: mounts:
+        lib.mapAttrs' (
+          dataset: mountpoint:
+          lib.nameValuePair mountpoint {
+            device = "${pool}/${dataset}";
+            fsType = "zfs";
+          }
+        ) mounts
+      ) cfg.pools
+    );
+  };
+}

configs/nixos/modules/monorepo.nix

@@ -4,13 +4,10 @@
   ...
 }:
 # Tools for developing this monorepo.
-let
-  cfg = config.modules.monorepo;
-in
 {
   options.modules.monorepo.enable = lib.mkEnableOption "tools for developing this monorepo";
 
-  config = lib.mkIf cfg.enable {
+  config = lib.mkIf config.modules.monorepo.enable {
     modules.shell.bazel.enable = true;
     modules.shell.python.enable = true;
     modules.shell.rust.enable = true;

configs/nixos/modules/network/default.nix

@@ -0,0 +1,57 @@
+{
+  config,
+  lib,
+  pkgs,
+  util,
+  ...
+}:
+# NetworkManager-managed networking.
+let
+  networkStatus = pkgs.writeShellScript "waybar-network-status" ''
+    active=$(
+      ${lib.getExe' pkgs.networkmanager "nmcli"} -t -f DEVICE,TYPE,STATE,CONNECTION device status \
+        | ${lib.getExe' pkgs.gawk "awk"} -F: '$3 == "connected" && $2 != "loopback" { print; exit }'
+    )
+
+    if [ -z "$active" ]; then
+      ${lib.getExe pkgs.jq} -cn \
+        --arg text "${util.glyph "f127"} off" \
+        --arg tooltip "Network disconnected" \
+        --arg class "disconnected" \
+        '{ text: $text, tooltip: $tooltip, class: $class }'
+      exit 0
+    fi
+
+    IFS=: read -r device type _state connection <<< "$active"
+
+    case "$type" in
+      wifi) icon="${util.glyph "f1eb"}" ;;
+      ethernet) icon="LAN" ;;
+      *) icon="NET" ;;
+    esac
+
+    ipaddr=$(${lib.getExe' pkgs.iproute2 "ip"} -4 -o addr show dev "$device" | ${lib.getExe' pkgs.gawk "awk"} '{ print $4; exit }')
+
+    ${lib.getExe pkgs.jq} -cn \
+      --arg text "$icon $connection" \
+      --arg tooltip "$device: ''${ipaddr:-no IPv4}" \
+      --arg class "$type" \
+      '{ text: $text, tooltip: $tooltip, class: $class }'
+  '';
+in
+{
+  options.modules.network.enable = lib.mkEnableOption "NetworkManager-managed networking";
+
+  config = lib.mkIf config.modules.network.enable {
+    networking.networkmanager.enable = true;
+
+    registry.waybar.${config.networking.hostName}."custom/network" = {
+      order = 60;
+      settings = {
+        return-type = "json";
+        exec = "${networkStatus}";
+        interval = 5;
+      };
+    };
+  };
+}

configs/nixos/modules/network/ssh.nix

@@ -4,343 +4,202 @@
   registry,
   ...
 }:
-# SSH on this machine, in both directions.
+# Configures inbound and outbound SSH access.
 let
   cfg = config.modules.network.ssh;
   user = config.user.name;
 
-  inherit (lib)
-    concatLists
-    concatStringsSep
-    elem
-    filter
-    genAttrs
-    hasAttr
-    imap0
-    listToAttrs
-    mapAttrs
-    mapAttrsToList
-    mkIf
-    mkMerge
-    mkOption
-    nameValuePair
-    optional
-    optionalAttrs
-    types
-    unique
-    ;
+  workstationNames = [
+    "neogaia"
+    "zeus"
+  ];
+  serverNames = [ "pikachu" ];
 
-  hostKeySecret = type: "ssh-host-${type}-key";
-  userKeySecret = "ssh-user-ed25519-key";
+  isWorkstation = lib.elem config.networking.hostName workstationNames;
+  isServer = lib.elem config.networking.hostName serverNames;
 
-  targetType = types.submodule (
-    { name, ... }:
-    {
-      options = {
-        hostName = mkOption {
-          type = types.str;
-          default = name;
-          description = ''
-            The network address OpenSSH connects to for this target.
-          '';
-        };
+  clientKeyFor = host: builtins.readFile (../../hosts + "/${host}/ssh_user_ed25519_key.pub");
+  hostKeysFor =
+    host:
+    map builtins.readFile [
+      (../../hosts + "/${host}/ssh_host_ed25519_key.pub")
+      (../../hosts + "/${host}/ssh_host_rsa_key.pub")
+    ];
 
-        user = mkOption {
-          type = types.str;
-          default = config.user.name;
-          description = ''
-            The remote login name OpenSSH uses for this target.
-          '';
-        };
+  managedTargets = lib.genAttrs (workstationNames ++ serverNames) (name: {
+    hostName = registry.address.${name}.self;
+    clientKey = clientKeyFor name;
+    hostKeys = hostKeysFor name;
+  });
 
-        port = mkOption {
-          type = types.port;
-          default = 22;
-          description = ''
-            The TCP port OpenSSH uses for this target.
-          '';
-        };
+  extraTargets = {
+    # TODO: Pin Gitea's host key after migrating it from Proxmox.
+    gitea = {
+      hostName = "git.alexion.dev";
+      port = 2022;
+      user = "gitea";
+      aliases = [
+        "gitea"
+        "git.alexion.dev"
+      ];
+    };
+  };
 
-        aliases = mkOption {
-          type = types.listOf types.str;
-          default = [ name ];
-          description = ''
-            Host patterns written into the generated OpenSSH client block.
-          '';
-        };
-
-        clientKey = mkOption {
-          type = types.nullOr types.str;
-          default = null;
-          description = ''
-            The public key this target offers when it connects outward.
-            Other machines admit this key according to the host groups below.
-          '';
-        };
-
-        hostKeys = mkOption {
-          type = types.listOf types.str;
-          default = [ ];
-          description = ''
-            The public keys this target presents when it accepts inbound SSH.
-            These keys generate system-wide known-host entries.
-          '';
-        };
-      };
-    }
-  );
-
-  keyWithoutComment = key: concatStringsSep " " (lib.take 2 (lib.splitString " " key));
-
-  targetNamesIn = names: filter (name: hasAttr name cfg.targets) names;
-
-  workstationNames = targetNamesIn cfg.hosts.workstations;
-  serverNames = targetNamesIn cfg.hosts.servers;
-
-  clientKeysFor = names: filter (key: key != null) (map (name: cfg.targets.${name}.clientKey) names);
-
-  currentHost = config.networking.hostName;
-  isServer = elem currentHost cfg.hosts.servers;
-  isWorkstation = elem currentHost cfg.hosts.workstations;
+  mkTarget = name: target: {
+    hostName = target.hostName or name;
+    user = target.user or user;
+    port = target.port or 22;
+    aliases = target.aliases or [ name ];
+    clientKey = target.clientKey or null;
+    hostKeys = target.hostKeys or [ ];
+  };
+  targets = lib.mapAttrs mkTarget (managedTargets // extraTargets);
 
+  clientKeysFor = names: lib.filter (key: key != null) (map (name: targets.${name}.clientKey) names);
   defaultAuthorizedKeys = lib.flatten (
-    clientKeysFor workstationNames
-    ++ optional isServer (clientKeysFor serverNames)
+    clientKeysFor workstationNames ++ lib.optional isServer (clientKeysFor serverNames)
   );
 
   outboundTargetNames =
     let
       groupTargets =
         if isServer then
-          [ "gitea" ] ++ cfg.hosts.servers
+          builtins.attrNames extraTargets ++ serverNames
         else if isWorkstation then
-          [ "gitea" ] ++ cfg.hosts.servers ++ cfg.hosts.workstations
+          builtins.attrNames extraTargets ++ serverNames ++ workstationNames
         else
-          [ "gitea" ];
+          builtins.attrNames extraTargets;
     in
-    filter (name: name != currentHost) (targetNamesIn groupTargets);
+    lib.filter (name: name != config.networking.hostName) groupTargets;
 
-  sshSettingsFor = name:
-    let
-      target = cfg.targets.${name};
-    in
-    {
-      header = "Host ${concatStringsSep " " target.aliases}";
-      HostName = target.hostName;
-      User = target.user;
-    }
-    // optionalAttrs (target.port != 22) { Port = target.port; };
-
-  knownHostNamesFor = target:
-    let
-      names = unique (target.aliases ++ [ target.hostName ]);
-      withPort = name: if target.port == 22 then name else "[${name}]:${toString target.port}";
-    in
-    map withPort names;
-
-  knownHosts = listToAttrs (
-    concatLists (
-      mapAttrsToList (
+  knownHosts = lib.listToAttrs (
+    lib.concatLists (
+      lib.mapAttrsToList (
         targetName: target:
-        imap0 (i: key:
-          nameValuePair "${targetName}-${toString i}" {
+        lib.imap0 (
+          i: key:
+          lib.nameValuePair "${targetName}-${toString i}" {
             hostNames = knownHostNamesFor target;
             publicKey = keyWithoutComment key;
           }
         ) target.hostKeys
-      ) cfg.targets
+      ) targets
     )
   );
+  knownHostNamesFor =
+    target:
+    let
+      withPort = name: if target.port == 22 then name else "[${name}]:${toString target.port}";
+      names = lib.unique (target.aliases ++ [ target.hostName ]);
+    in
+    map withPort names;
+
+  keyWithoutComment = key: lib.concatStringsSep " " (lib.take 2 (lib.splitString " " key));
+
+  sshSettingsFor =
+    name:
+    let
+      target = targets.${name};
+    in
+    {
+      header = "Host ${lib.concatStringsSep " " target.aliases}";
+      HostName = target.hostName;
+      User = target.user;
+    }
+    // lib.optionalAttrs (target.port != 22) { Port = target.port; };
+
+  hostKeySecret = type: "ssh-host-${type}-key";
+  hostKeyTypes = [
+    "ed25519"
+    "rsa"
+  ];
+  userKeySecret = "ssh-user-ed25519-key";
+
 in
 {
   options.modules.network.ssh = {
-    enable = lib.mkEnableOption "the OpenSSH daemon, with host keys restored from secrets";
+    enable = lib.mkEnableOption "the OpenSSH daemon";
 
-    hosts = {
-      servers = mkOption {
-        type = types.listOf types.str;
-        default = [ "pikachu" ];
-        description = ''
-          Hosts that serve durable services.
-          They admit workstation keys and server keys, and they receive aliases for other servers and the forge.
-        '';
-      };
-
-      workstations = mkOption {
-        type = types.listOf types.str;
-        default = [
-          "neogaia"
-          "zeus"
-        ];
-        description = ''
-          Hosts the operator works from.
-          Their keys are admitted by every host, and they receive aliases for the whole fleet and the forge.
-        '';
-      };
-    };
-
-    targets = mkOption {
-      type = types.attrsOf targetType;
-      default = {
-        gitea = {
-          hostName = "git.alexion.dev";
-          port = 2022;
-          user = "gitea";
-          aliases = [
-            "gitea"
-            "git.alexion.dev"
-          ];
-        };
-
-        neogaia = {
-          hostName = registry.address.neogaia.self;
-          clientKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIGxQ4kWsBo2OGYIPOkFe0vNEcB3yoJwAu0y9wrdQzALE alexion@neogaia";
-          hostKeys = [
-            "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJS+wp7K123+4BT6G4f954R6WyrbWveY7VlpoBUf6I5p neogaia"
-            "ssh-rsa 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 neogaia"
-          ];
-        };
-
-        zeus = {
-          hostName = registry.address.zeus.self;
-          clientKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIIRBcHHuubptXCdvED/p2dR3MpjGN/AimqLasLY5984G alexion@zeus";
-          hostKeys = [
-            "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJ4GBPt966LR4LpmXgiMMkepIqNIlXTUBh4zdNeek/lN root@zeus"
-            "ssh-rsa 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 root@zeus"
-          ];
-        };
-
-        pikachu = {
-          hostName = registry.address.pikachu.self;
-          clientKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAINNqJIC6VRXyvrNf3n9su9KdPCikC3CjK/QrCK2reHdB alexion@pikachu";
-          hostKeys = [
-            "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIKljRf4pJO+pqEqjpPz08gOYq3g1PpxvE66xVw7uMEnA root@pikachu"
-            "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAACAQCy/riwm7dflA3mT+3a0/2CIoS2LbAsK/vn35kOoNeuzn0yhiF+imexP6tkB3S2t+H5ybRzkbbuNZcynFfeCqthFc8kvbdCnt8Diqoeg96fZ6ecvh5QE5yH9op8534EySetZ/exakFLnF+6EiWMuWUW3DFwsc2kcgDJObqSE8gTx/d7JK953MiTFmSJBFyg1RtQ3ZnMT+iCrvY2dyCLQai7VeF8koVKF2c0leAq2Hc75rb/L9md8MoJa64iPiz7hwTCin3xoFyaY/5hNVvyqFd5PivgR69gLdJkuVsUYO2mJzhur8cYmJD+pGjJ0U45hyE9TMrCFjeJHHuvSt3+2kph62wv95jLNk0WmMlwgyunISxENCSVVtNYdBMXhUh8VhEAW17QpVUg9EnPvxOdTKEjrvfOZYASWUa51JKbgBgexVgFbxdjDZR88DZa31AVBts/cx/59gXTUahFXMYLdZgssx+5uibZQWnvCyfUV9WLbfmK1lgL6hzReg1VkQ87iGr6skjtQYemJxRaFNA1+Q5f3kmG3KncuK/594a3qXYP4gC6A2blf8om1YZ4aXXh6f+GFKLjoEw1vvM2rJ+rjzfymwDX+pxVQ9L13OEtVZc9Ez76pOkbm1hqdbL0gY45+0cpxodhWV0wMQJBDXL1MHP8qcs+/vw0GxVK5l1SnWBGlw== root@pikachu"
-          ];
-        };
-      };
-      description = ''
-        SSH targets known to the fleet.
-        The inventory holds connection details plus public keys used for authorization and host verification.
-      '';
-    };
-
-    extraAuthorizedKeys = mkOption {
-      type = types.listOf types.str;
-      default = [ ];
-      description = ''
-        Additional client public keys admitted by this host.
-      '';
-    };
-
-    authorizedKeys = mkOption {
-      type = types.nullOr (types.listOf types.str);
-      default = null;
-      description = ''
-        Complete override for client public keys admitted by this host.
-        Leave null to derive access from `modules.network.ssh.hosts` and `modules.network.ssh.targets`.
-      '';
-    };
-
-    extraSettings = mkOption {
-      type = types.attrsOf types.anything;
-      default = { };
-      description = ''
-        Additional OpenSSH client settings merged into the generated Home Manager configuration.
-      '';
-    };
-
-    hostKeys.restore = mkOption {
-      type = types.bool;
+    hostKeys.restore = lib.mkOption {
+      type = lib.types.bool;
       default = true;
       description = ''
-        Restore the host keys from secrets rather than letting the daemon generate its own.
-        A machine with its own identity keeps its fingerprint across a reimage by restoring committed keys.
-        A guest carries no host identity, so it turns this off and presents a self-generated key instead.
+        Restores host keys from secrets.
+        Preserves the fingerprint across reimages.
+        Guests disable this option and generate their own host keys.
       '';
     };
 
-    hostKeys.sopsFile = mkOption {
-      type = types.nullOr types.path;
+    hostKeys.sopsFile = lib.mkOption {
+      type = lib.types.nullOr lib.types.path;
       default = null;
       description = ''
-        Encrypted file holding this host's SSH host private keys, one entry per key type, named `ssh-host-<type>-key`.
-        Required when `restore` is on.
+        Sets encrypted file that contains host private keys.
+        Names each secret `ssh-host-<type>-key`.
+        Requires a value when `restore` is enabled.
       '';
     };
 
-    hostKeys.types = mkOption {
-      type = types.listOf types.str;
-      default = [
-        "ed25519"
-        "rsa"
-      ];
-      description = ''
-        Key types to restore, naming both the entries read from the encrypted file and the algorithms the daemon offers.
-      '';
-    };
-
-    userKey.sopsFile = mkOption {
-      type = types.nullOr types.path;
+    userKey.sopsFile = lib.mkOption {
+      type = lib.types.nullOr lib.types.path;
       default = null;
       description = ''
-        Encrypted file holding this machine's SSH client private key, under the entry `ssh-user-ed25519-key`.
-        Left unset on a machine that authenticates to no remote server, such as a guest.
+        Sets encrypted file that contains the SSH client private key.
+        Names the secret `ssh-user-ed25519-key`.
+        Guests leave this unset because they do not authenticate to remote servers.
       '';
     };
   };
 
-  config = mkIf cfg.enable (
-    mkMerge [
+  config = lib.mkIf cfg.enable (
+    lib.mkMerge [
       {
         services.openssh.enable = true;
 
-        users.users.${user}.openssh.authorizedKeys.keys =
-          if cfg.authorizedKeys != null then
-            cfg.authorizedKeys
-          else
-            defaultAuthorizedKeys ++ cfg.extraAuthorizedKeys;
+        users.users.${user}.openssh.authorizedKeys.keys = defaultAuthorizedKeys;
 
         programs.ssh.knownHosts = knownHosts;
 
         home-manager.users.${user}.programs.ssh = {
           enable = true;
           enableDefaultConfig = false;
-          settings =
-            mapAttrs (name: _: sshSettingsFor name) (genAttrs outboundTargetNames (name: name))
-            // cfg.extraSettings;
+          settings = lib.mapAttrs (name: _: sshSettingsFor name) (
+            lib.genAttrs outboundTargetNames (name: name)
+          );
         };
       }
 
-      (mkIf cfg.hostKeys.restore {
+      (lib.mkIf cfg.hostKeys.restore {
         assertions = [
           {
             assertion = cfg.hostKeys.sopsFile != null;
-            message = "modules.network.ssh.hostKeys.restore requires modules.network.ssh.hostKeys.sopsFile to name the encrypted host keys.";
+            message = "Set `modules.network.ssh.hostKeys.sopsFile` when host-key restoration is enabled.";
           }
         ];
 
-        sops.secrets = genAttrs (map hostKeySecret cfg.hostKeys.types) (_: {
+        sops.secrets = lib.genAttrs (map hostKeySecret hostKeyTypes) (_: {
           inherit (cfg.hostKeys) sopsFile;
           mode = "0400";
           restartUnits = [ "sshd.service" ];
         });
 
         services.openssh.hostKeys = [ ];
-        services.openssh.extraConfig = concatStringsSep "" (
-          map (type: "HostKey ${config.sops.secrets.${hostKeySecret type}.path}\n") cfg.hostKeys.types
+        services.openssh.extraConfig = lib.concatStringsSep "" (
+          map (type: "HostKey ${config.sops.secrets.${hostKeySecret type}.path}\n") hostKeyTypes
         );
       })
 
-      (mkIf (cfg.userKey.sopsFile != null) {
+      (lib.mkIf (cfg.userKey.sopsFile != null) {
         sops.secrets.${userKeySecret} = {
           inherit (cfg.userKey) sopsFile;
           mode = "0400";
           owner = user;
         };
 
-        home-manager.users.${user}.programs.ssh.settings."*".IdentityFile =
-          config.sops.secrets.${userKeySecret}.path;
+        home-manager.users.${user}.programs.ssh.settings."*" = {
+          IdentityFile = config.sops.secrets.${userKeySecret}.path;
+          IdentitiesOnly = true;
+        };
       })
     ]
   );

configs/nixos/modules/network/vlans.nix

@@ -4,24 +4,17 @@
   util,
   ...
 }:
-# The host networking foundation: per-VLAN bridges over a tagged trunk.
+# Configures bridges for tagged VLANs on a physical interface that uses DHCP.
 let
   cfg = config.modules.network.vlans;
-
-  inherit (util) bridgeName;
-
-  vlanName = id: "${cfg.trunk}.${toString id}";
 in
 {
   options.modules.network.vlans = {
-    enable = lib.mkEnableOption "host VLAN bridges over a tagged trunk";
-
-    trunk = lib.mkOption {
+    interface = lib.mkOption {
       type = lib.types.str;
       example = "enp1s0";
       description = ''
-        Physical interface that carries 802.1Q-tagged traffic for every VLAN.
-        Each declared VLAN attaches to its own bridge.
+        Names the physical interface that carries untagged DHCP traffic and tagged VLANs.
       '';
     };
 
@@ -34,66 +27,37 @@ in
         30
       ];
       description = ''
-        Tagged VLAN ids to materialize.
-        Each id N creates one bridge named `br-vlanN`.
+        Creates bridges for the specified tagged VLAN IDs.
+
+        VLAN ID N creates bridge `br-vlanN`.
       '';
     };
-
-    management = {
-      vlan = lib.mkOption {
-        type = lib.types.nullOr (lib.types.ints.between 1 4094);
-        default = null;
-        description = ''
-          VLAN whose bridge carries the host's own management address.
-          The value must be one of `ids`.
-          Left null, the host takes no address on any bridge.
-        '';
-      };
-
-      address = lib.mkOption {
-        type = lib.types.nullOr lib.types.str;
-        default = null;
-        example = "10.0.10.2/24";
-        description = ''
-          Host static management address in CIDR form.
-          Left null, the host takes its management address by DHCP.
-        '';
-      };
-    };
   };
 
-  config = lib.mkIf cfg.enable {
-    assertions = [
-      {
-        assertion = cfg.management.vlan == null || lib.elem cfg.management.vlan cfg.ids;
-        message = "modules.network.vlans.management.vlan (${toString cfg.management.vlan}) must name one of modules.network.vlans.ids.";
-      }
-      {
-        assertion = cfg.management.address == null || cfg.management.vlan != null;
-        message = "modules.network.vlans.management.address needs modules.network.vlans.management.vlan to say which bridge carries it.";
-      }
-    ];
-
-    # networkd owns these interfaces so NetworkManager does not contend for them.
-    networking.networkmanager.unmanaged =
-      [ "interface-name:${cfg.trunk}" ]
-      ++ map (id: "interface-name:${bridgeName id}") cfg.ids
-      ++ map (id: "interface-name:${vlanName id}") cfg.ids;
+  config = lib.mkIf (cfg.ids != [ ]) {
+    networking = {
+      useDHCP = false;
+      networkmanager.unmanaged = [
+        "interface-name:${cfg.interface}"
+      ]
+      ++ map (id: "interface-name:${util.bridgeName id}") cfg.ids
+      ++ map (id: "interface-name:vlan${toString id}") cfg.ids;
+    };
 
     systemd.network = {
       enable = true;
 
       netdevs = lib.mkMerge (
         map (id: {
-          "40-${bridgeName id}" = {
+          "40-${util.bridgeName id}" = {
             netdevConfig = {
-              Name = bridgeName id;
+              Name = util.bridgeName id;
               Kind = "bridge";
             };
           };
-          "40-${vlanName id}" = {
+          "40-vlan${toString id}" = {
             netdevConfig = {
-              Name = vlanName id;
+              Name = "vlan${toString id}";
               Kind = "vlan";
             };
             vlanConfig.Id = id;
@@ -103,37 +67,25 @@ in
 
       networks = lib.mkMerge (
         [
-          # The trunk carries only tagged frames and takes no address.
           {
-            "30-${cfg.trunk}" = {
-              matchConfig.Name = cfg.trunk;
-              networkConfig.LinkLocalAddressing = "no";
-              linkConfig.RequiredForOnline = "no";
-              vlan = map vlanName cfg.ids;
+            "10-${cfg.interface}" = {
+              matchConfig.Name = cfg.interface;
+              networkConfig.DHCP = "yes";
+              vlan = map (id: "vlan${toString id}") cfg.ids;
+              linkConfig.RequiredForOnline = "routable";
             };
           }
         ]
         ++ map (id: {
-          # Enslaved to its bridge, carrying no address itself.
-          "40-${vlanName id}" = {
-            matchConfig.Name = vlanName id;
-            networkConfig.Bridge = bridgeName id;
+          "40-vlan${toString id}" = {
+            matchConfig.Name = "vlan${toString id}";
+            networkConfig.Bridge = util.bridgeName id;
+            linkConfig.RequiredForOnline = "no";
+          };
+          "40-${util.bridgeName id}" = {
+            matchConfig.Name = util.bridgeName id;
             linkConfig.RequiredForOnline = "no";
           };
-          # The management bridge carries the host address.
-          # Other bridges provide L2 segments for guests.
-          "40-${bridgeName id}" = lib.mkMerge [
-            {
-              matchConfig.Name = bridgeName id;
-              linkConfig.RequiredForOnline = "no";
-            }
-            (lib.mkIf (cfg.management.vlan == id) (
-              if cfg.management.address == null then
-                { networkConfig.DHCP = "yes"; }
-              else
-                { address = [ cfg.management.address ]; }
-            ))
-          ];
         }) cfg.ids
       );
     };

configs/nixos/modules/network/vpn-client.nix

@@ -1,10 +1,34 @@
 {
   config,
   lib,
+  pkgs,
+  util,
   ...
 }:
 let
   cfg = config.modules.network.vpn-client;
+
+  vpnIcon = util.glyph [
+    "db83"
+    "dc9d"
+  ];
+
+  vpnStatus = pkgs.writeShellScript "waybar-vpn-status" ''
+    interface=${lib.escapeShellArg cfg.interface}
+
+    if ! ${lib.getExe' pkgs.iproute2 "ip"} link show dev "$interface" >/dev/null 2>&1; then
+      printf '{"text":"","class":"idle"}\n'
+      exit 0
+    fi
+
+    ipaddr=$(${lib.getExe' pkgs.iproute2 "ip"} -4 -o addr show dev "$interface" | ${lib.getExe' pkgs.gawk "awk"} '{ print $4; exit }')
+
+    ${lib.getExe pkgs.jq} -cn \
+      --arg text "${vpnIcon}" \
+      --arg tooltip "VPN $interface: ''${ipaddr:-no IPv4}" \
+      --arg class "active" \
+      '{ text: $text, tooltip: $tooltip, class: $class }'
+  '';
 in
 {
   options.modules.network.vpn-client = {
@@ -13,61 +37,31 @@ in
     interface = lib.mkOption {
       type = lib.types.str;
       default = "wg-home";
-      description = "WireGuard interface name.";
+      description = "Names the WireGuard interface.";
     };
 
     address = lib.mkOption {
       type = lib.types.str;
       example = "10.23.100.3/32";
-      description = "Client tunnel address in CIDR notation.";
-    };
-
-    privateKeySecret = lib.mkOption {
-      type = lib.types.str;
-      default = "wireguard-home-private-key";
-      description = "SOPS secret containing the WireGuard client private key.";
-    };
-
-    autoStart = lib.mkOption {
-      type = lib.types.bool;
-      default = false;
-      description = "Whether to start the VPN tunnel during boot.";
-    };
-
-    mtu = lib.mkOption {
-      type = lib.types.nullOr lib.types.int;
-      default = 1280;
-      description = "Tunnel MTU, or null to use the WireGuard default.";
+      description = "Sets the client tunnel address in CIDR notation.";
     };
 
     sopsFile = lib.mkOption {
       type = lib.types.nullOr lib.types.path;
       default = null;
-      description = "Encrypted secrets file that contains privateKeySecret.";
+      description = "Names the encrypted file that contains the WireGuard private key.";
     };
 
     peer = {
       publicKey = lib.mkOption {
         type = lib.types.str;
-        description = "WireGuard public key for the remote peer.";
+        description = "Sets the WireGuard public key for the remote peer.";
       };
 
       endpoint = lib.mkOption {
         type = lib.types.str;
         example = "203.0.113.10:51820";
-        description = "WireGuard endpoint for the remote peer.";
-      };
-
-      allowedIPs = lib.mkOption {
-        type = lib.types.listOf lib.types.str;
-        default = [ "10.23.0.0/16" ];
-        description = "Routes to send through the VPN tunnel.";
-      };
-
-      persistentKeepalive = lib.mkOption {
-        type = lib.types.nullOr lib.types.int;
-        default = 25;
-        description = "Persistent keepalive interval in seconds, or null to disable it.";
+        description = "Sets the WireGuard endpoint for the remote peer.";
       };
     };
   };
@@ -76,28 +70,39 @@ in
     assertions = [
       {
         assertion = cfg.sopsFile != null;
-        message = "modules.network.vpn-client.sopsFile must name the encrypted secrets file containing the WireGuard private key.";
+        message = "Set modules.network.vpn-client.sopsFile when the VPN client is enabled.";
       }
     ];
 
-    sops.secrets.${cfg.privateKeySecret}.sopsFile = cfg.sopsFile;
+    sops.secrets.wireguard-home-private-key.sopsFile = cfg.sopsFile;
 
-    systemd.targets."wireguard-${cfg.interface}" = lib.mkIf (!cfg.autoStart) {
-      wantedBy = lib.mkForce [ ];
+    registry.shell-shortcut.${config.networking.hostName} = {
+      vpn-on = "sudo systemctl start wireguard-${cfg.interface}.target";
+      vpn-off = "sudo systemctl stop 'wireguard-${cfg.interface}*.service' wireguard-${cfg.interface}.target";
     };
 
+    registry.waybar.${config.networking.hostName}."custom/vpn" = {
+      order = 50;
+      settings = {
+        return-type = "json";
+        exec = "${vpnStatus}";
+        interval = 5;
+      };
+    };
+
+    systemd.targets."wireguard-${cfg.interface}".wantedBy = lib.mkForce [ ];
+
     networking.wireguard.interfaces.${cfg.interface} = {
       ips = [ cfg.address ];
-      mtu = cfg.mtu;
-      privateKeyFile = config.sops.secrets.${cfg.privateKeySecret}.path;
+      mtu = 1280;
+      privateKeyFile = config.sops.secrets.wireguard-home-private-key.path;
 
       peers = [
-        ({
-          inherit (cfg.peer) publicKey endpoint allowedIPs;
+        {
+          inherit (cfg.peer) publicKey endpoint;
+          allowedIPs = [ "10.23.0.0/16" ];
+          persistentKeepalive = 25;
         }
-        // lib.optionalAttrs (cfg.peer.persistentKeepalive != null) {
-          inherit (cfg.peer) persistentKeepalive;
-        })
       ];
     };
   };

configs/nixos/modules/services/actualbudget.nix

@@ -1,62 +0,0 @@
-{
-  config,
-  lib,
-  ...
-}:
-let
-  cfg = config.modules.services.actualbudget;
-in
-{
-  options.modules.services.actualbudget = {
-    enable = lib.mkEnableOption "Actual Budget";
-
-    port = lib.mkOption {
-      type = lib.types.port;
-      default = 5006;
-      description = "Port Actual Budget listens on.";
-    };
-
-    dataDir = lib.mkOption {
-      type = lib.types.str;
-      default = "/data";
-      description = "Directory where Actual Budget stores server and user files.";
-    };
-
-    user = lib.mkOption {
-      type = lib.types.str;
-      default = "actual";
-      description = "User account that runs Actual Budget.";
-    };
-
-    group = lib.mkOption {
-      type = lib.types.str;
-      default = "storage";
-      description = "Group account that owns Actual Budget's writable state.";
-    };
-
-  };
-
-  config = lib.mkMerge [
-    {
-      registry."stable-uid".${config.networking.hostName}.actualbudget = 20001;
-    }
-
-    (lib.mkIf cfg.enable {
-      users.users.${cfg.user} = {
-        isSystemUser = true;
-        uid = config.registry."stable-uid".${config.networking.hostName}.actualbudget;
-        group = cfg.group;
-      };
-
-      services.actual = {
-        enable = true;
-        openFirewall = true;
-        user = cfg.user;
-        group = cfg.group;
-        settings = {
-          inherit (cfg) port dataDir;
-        };
-      };
-    })
-  ];
-}

configs/nixos/modules/services/copyparty.nix

@@ -2,138 +2,135 @@
   config,
   lib,
   pkgs,
+  util,
   ...
 }:
 let
   cfg = config.modules.services.copyparty;
 
-  volumeType = lib.types.submodule {
-    options = {
-      path = lib.mkOption {
-        type = lib.types.str;
-        description = "Filesystem path served by this volume.";
-      };
+  accountName = config.user.name;
 
-      access = lib.mkOption {
-        type = lib.types.attrsOf (lib.types.listOf lib.types.str);
-        default = { };
-        example = {
-          A = [ "alexion" ];
-        };
-        description = "Copyparty access map from permission string to account names.";
-      };
+  serviceGroup = "storage";
 
-      flags = lib.mkOption {
-        type = lib.types.listOf lib.types.str;
-        default = [ ];
-        example = [ "dthumb" ];
-        description = "Copyparty volume flags.";
-      };
-    };
+  serviceStateDir = "/var/lib/copyparty";
+
+  serviceUser = "copyparty";
+
+  writableVolumes = lib.filter (volume: !volume.readOnly) (lib.attrValues cfg.volumes);
+
+  port = 3923;
+  defaultAccess = {
+    A = [ accountName ];
   };
 
-  renderAccess = permission: accounts: "    ${permission}: ${lib.concatStringsSep ", " accounts}";
+  defaultWritableFlags = {
+    d2d = true;
+    d2t = true;
+    dthumb = true;
+  };
 
-  hasFlag = name: flags: lib.any (flag: lib.hasPrefix "${name}:" flag || lib.hasPrefix "${name}=" flag) flags;
+  credentialHash = builtins.substring 0 16 (builtins.hashString "sha256" accountName);
 
-  defaultPermissionFlags = flags:
-    lib.optionals (!(hasFlag "chmod_d" flags)) [ "chmod_d: 2770" ]
-    ++ lib.optionals (!(hasFlag "chmod_f" flags)) [ "chmod_f: 660" ];
+  credentialName = "password-${credentialHash}";
 
-  renderFlags = flags: lib.concatMapStringsSep "\n" (flag: "    ${flag}") (flags ++ defaultPermissionFlags flags);
+  passwordPlaceholder = "@COPYPARTY_PASSWORD_${credentialHash}@";
 
-  renderVolume = urlPath: volume: ''
-    [${urlPath}]
-      ${volume.path}
-      accs:
-    ${lib.concatStringsSep "\n" (lib.mapAttrsToList renderAccess volume.access)}
-    ${lib.optionalString (volume.flags != [ ]) ''
-      flags:
-    ${renderFlags volume.flags}
-    ''}
-  '';
+  globalSettings = {
+    i = "0.0.0.0";
+    usernames = true;
+    "http-only" = true;
+    "no-crt" = true;
+    "no-thumb" = true;
+    "no-snap" = true;
+    "no-rescan" = true;
+    "ses-db" = "${serviceStateDir}/sessions.db";
+    "chpw-db" = "${serviceStateDir}/chpw.json";
+    "shr-db" = "${serviceStateDir}/shares.db";
+  }
+  // lib.optionalAttrs cfg.reverseProxy.enable {
+    rproxy = 1;
+    "xff-hdr" = "x-forwarded-for";
+  };
 
-  renderTrustedSource = source: "  xff-src: ${source}";
+  globalExtraConfig = lib.optionalString cfg.reverseProxy.enable (
+    lib.concatMapStringsSep "\n" (source: "xff-src: ${source}") cfg.reverseProxy.trustedSources
+  );
 
-  renderedReverseProxy = lib.optionalString cfg.reverseProxy.enable ''
-      rproxy: 1
-      xff-hdr: x-forwarded-for
-    ${lib.concatStringsSep "\n" (map renderTrustedSource cfg.reverseProxy.trustedSources)}
-  '';
+  volumeFlags =
+    flags:
+    lib.optionalAttrs (flags != { }) (
+      {
+        chmod_d = "2770";
+        chmod_f = "660";
+      }
+      // flags
+    );
 
-  renderedVolumes = lib.concatStringsSep "\n" (lib.mapAttrsToList renderVolume cfg.volumes);
+  renderedVolumes = lib.mapAttrs (_urlPath: volume: {
+    inherit (volume) path;
+    access = if volume.readOnly then { r = [ accountName ]; } else defaultAccess // volume.access;
+    flags = volumeFlags (lib.optionalAttrs (!volume.readOnly) defaultWritableFlags // volume.flags);
+  }) cfg.volumes;
 
-  configScript = pkgs.writeShellScript "copyparty-config" ''
-    set -eu
+  configText = util.formats.copyparty.render {
+    inherit globalExtraConfig;
+    accounts.${accountName} = passwordPlaceholder;
+    global = globalSettings;
+    volumes = renderedVolumes;
+  };
 
-    umask 077
-    password="$(${pkgs.coreutils}/bin/tr -d '\n' < "$CREDENTIALS_DIRECTORY/password")"
+  configFile = pkgs.writeText "copyparty.conf" configText;
 
-    cat > /run/copyparty/copyparty.conf <<EOF
-    [global]
-      p: ${toString cfg.port}
-      usernames
-      http-only
-      no-crt
-      no-thumb
-      no-snap
-      no-rescan
-      ses-db: ${cfg.stateDir}/sessions.db
-      chpw-db: ${cfg.stateDir}/chpw.json
-      shr-db: ${cfg.stateDir}/shares.db
-    ${renderedReverseProxy}
-    [accounts]
-      ${cfg.accountName}: $password
-
-    ${renderedVolumes}
-    EOF
+  replacePassword = ''
+    ${lib.getExe pkgs.replace-secret} ${lib.escapeShellArg passwordPlaceholder} "$CREDENTIALS_DIRECTORY/${credentialName}" /run/copyparty/copyparty.conf
   '';
 in
 {
   options.modules.services.copyparty = {
     enable = lib.mkEnableOption "Copyparty";
 
-    package = lib.mkPackageOption pkgs "copyparty-min" { };
-
-    port = lib.mkOption {
-      type = lib.types.port;
-      default = 3923;
-      description = "Port Copyparty listens on.";
-    };
-
-    user = lib.mkOption {
-      type = lib.types.str;
-      default = "copyparty";
-      description = "User account that runs Copyparty.";
-    };
-
-    group = lib.mkOption {
-      type = lib.types.str;
-      default = "storage";
-      description = "Group account that owns Copyparty's writable state and served files.";
-    };
-
-    accountName = lib.mkOption {
-      type = lib.types.str;
-      default = "alexion";
-      description = "Copyparty account name configured for password authentication.";
-    };
-
     passwordFile = lib.mkOption {
-      type = lib.types.path;
-      description = "Runtime file containing the Copyparty account password.";
-    };
-
-    stateDir = lib.mkOption {
       type = lib.types.str;
-      default = "/var/lib/copyparty";
-      description = "Directory where Copyparty stores service state.";
+      description = "Sets the runtime file that contains the Copyparty account password.";
     };
 
     volumes = lib.mkOption {
-      type = lib.types.attrsOf volumeType;
+      type = lib.types.attrsOf (
+        lib.types.submodule {
+          options = {
+            path = lib.mkOption {
+              type = lib.types.externalPath;
+              description = "Sets the filesystem path served by this volume.";
+            };
+
+            access = lib.mkOption {
+              type = lib.types.attrsOf (lib.types.listOf lib.types.str);
+              default = { };
+              example = {
+                A = [ "alexion" ];
+              };
+              description = "Maps Copyparty permission strings to account names.";
+            };
+
+            readOnly = lib.mkOption {
+              type = lib.types.bool;
+              default = false;
+              description = "Serves this volume read-only.";
+            };
+
+            flags = lib.mkOption {
+              type = lib.types.attrs;
+              default = { };
+              example = {
+                dthumb = true;
+              };
+              description = "Sets Copyparty volume flags.";
+            };
+          };
+        }
+      );
       default = { };
-      description = "Copyparty volumes keyed by their URL path.";
+      description = "Defines Copyparty volumes by URL path.";
     };
 
     reverseProxy = {
@@ -142,7 +139,7 @@ in
       trustedSources = lib.mkOption {
         type = lib.types.listOf lib.types.str;
         default = [ ];
-        description = "IP ranges that may supply Copyparty's forwarded client IP header.";
+        description = "Lists proxy sources that can set Copyparty's forwarded client IP header.";
       };
     };
   };
@@ -164,43 +161,49 @@ in
         }
       ];
 
-      users.users.${cfg.user} = {
+      users.users.${serviceUser} = {
         isSystemUser = true;
         uid = config.registry."stable-uid".${config.networking.hostName}.copyparty;
-        group = cfg.group;
-        home = cfg.stateDir;
+        group = serviceGroup;
+        home = serviceStateDir;
       };
 
       systemd.services.copyparty = {
         description = "Copyparty file server";
         after = [ "network.target" ];
         wantedBy = [ "multi-user.target" ];
+        preStart = ''
+          ${lib.getExe' pkgs.coreutils "install"} -m 600 ${configFile} /run/copyparty/copyparty.conf
+          ${replacePassword}
+        '';
         serviceConfig = {
           ReloadSignal = "SIGUSR1";
           Type = "simple";
-          User = cfg.user;
-          Group = cfg.group;
-          WorkingDirectory = cfg.stateDir;
+          User = serviceUser;
+          Group = serviceGroup;
+          WorkingDirectory = serviceStateDir;
           Environment = [
-            "HOME=${cfg.stateDir}"
-            "XDG_CONFIG_HOME=${cfg.stateDir}"
+            "HOME=${serviceStateDir}"
+            "XDG_CONFIG_HOME=${serviceStateDir}"
           ];
           StateDirectory = "copyparty";
           RuntimeDirectory = "copyparty";
           RuntimeDirectoryMode = "0700";
-          LoadCredential = [ "password:${cfg.passwordFile}" ];
-          ExecStartPre = configScript;
-          ExecStart = "${lib.getExe cfg.package} -c /run/copyparty/copyparty.conf";
+          LoadCredential = [ "${credentialName}:${cfg.passwordFile}" ];
+          ExecStart = "${lib.getExe pkgs.copyparty-min} -c /run/copyparty/copyparty.conf";
           Restart = "on-failure";
           NoNewPrivileges = true;
           PrivateTmp = true;
           ProtectSystem = "strict";
           ProtectHome = true;
-          ReadWritePaths = [ cfg.stateDir ] ++ map (volume: volume.path) (lib.attrValues cfg.volumes);
+          ReadWritePaths = [
+            serviceStateDir
+          ]
+          ++ map (volume: volume.path) writableVolumes;
         };
       };
 
-      networking.firewall.allowedTCPPorts = [ cfg.port ];
+      networking.firewall.allowedTCPPorts = [ port ];
     })
   ];
 }

configs/nixos/modules/services/games/palworld.nix

@@ -0,0 +1,157 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+{
+  options.modules.services.games.palworld = {
+    enable = lib.mkEnableOption "Palworld dedicated server";
+
+    steamDir = lib.mkOption {
+      type = lib.types.str;
+      example = "/data/steamcmd";
+      description = "Directory where SteamCMD stores metadata and cache files.";
+    };
+
+    installDir = lib.mkOption {
+      type = lib.types.str;
+      example = "/data/servers/palworld/tracion";
+      description = "Directory where SteamCMD installs the Palworld server files.";
+    };
+
+    stateDir = lib.mkOption {
+      type = lib.types.str;
+      example = "/data/state/palworld/tracion";
+      description = "Directory where Palworld stores durable server state.";
+    };
+
+    serverName = lib.mkOption {
+      type = lib.types.str;
+      default = "palworld";
+      description = "Name shown for the Palworld server.";
+    };
+
+    port = lib.mkOption {
+      type = lib.types.port;
+      default = 8211;
+      description = "UDP port for the Palworld server.";
+    };
+
+    publicIP = lib.mkOption {
+      type = lib.types.nullOr lib.types.str;
+      default = null;
+      description = "Public IP address advertised by the Palworld server.";
+    };
+
+    maxPlayers = lib.mkOption {
+      type = lib.types.ints.between 1 32;
+      default = 32;
+      description = "Maximum player count for the Palworld server.";
+    };
+
+    publicLobby = lib.mkOption {
+      type = lib.types.bool;
+      default = true;
+      description = "Advertise the server in Palworld's public lobby.";
+    };
+
+    autoStart = lib.mkOption {
+      type = lib.types.bool;
+      default = true;
+      description = "Start the Palworld server after the guest reaches network readiness.";
+    };
+
+    rcon = {
+      enable = lib.mkEnableOption "Palworld RCON" // {
+        default = true;
+      };
+
+      port = lib.mkOption {
+        type = lib.types.port;
+        default = 25575;
+        description = "TCP port for Palworld RCON.";
+      };
+    };
+
+    passwordFile = lib.mkOption {
+      type = lib.types.path;
+      description = "Runtime file containing the Palworld server password.";
+    };
+
+    adminPasswordFile = lib.mkOption {
+      type = lib.types.path;
+      description = "Runtime file containing the Palworld admin password.";
+    };
+  };
+
+  config = lib.mkIf config.modules.services.games.palworld.enable (
+    let
+      service = config.modules.services.games.palworld;
+      savedDir = "${service.installDir}/Pal/Saved";
+      startScript = pkgs.writeShellScript "palworld-start" ''
+        set -eu
+
+        ${lib.getExe' pkgs.coreutils "install"} -d \
+          -m 0770 \
+          ${lib.escapeShellArg service.stateDir} \
+          ${lib.escapeShellArg (builtins.dirOf savedDir)}
+
+        if [ -L ${lib.escapeShellArg savedDir} ]; then
+          current_target="$(${lib.getExe' pkgs.coreutils "readlink"} ${lib.escapeShellArg savedDir})"
+          if [ "$current_target" != ${lib.escapeShellArg service.stateDir} ]; then
+            ${lib.getExe' pkgs.coreutils "rm"} ${lib.escapeShellArg savedDir}
+          fi
+        fi
+
+        if [ -d ${lib.escapeShellArg savedDir} ] && [ ! -L ${lib.escapeShellArg savedDir} ]; then
+          if ${lib.getExe' pkgs.findutils "find"} ${lib.escapeShellArg service.stateDir} -mindepth 1 -maxdepth 1 | ${lib.getExe' pkgs.gnugrep "grep"} -q .; then
+            ${lib.getExe' pkgs.coreutils "rm"} -rf ${lib.escapeShellArg savedDir}
+          else
+            ${lib.getExe' pkgs.coreutils "cp"} -a ${lib.escapeShellArg savedDir}/. ${lib.escapeShellArg service.stateDir}/
+            ${lib.getExe' pkgs.coreutils "rm"} -rf ${lib.escapeShellArg savedDir}
+          fi
+        fi
+
+        if [ ! -e ${lib.escapeShellArg savedDir} ]; then
+          ${lib.getExe' pkgs.coreutils "ln"} -s ${lib.escapeShellArg service.stateDir} ${lib.escapeShellArg savedDir}
+        fi
+
+        password="$(${lib.getExe' pkgs.coreutils "tr"} -d '\n' < ${lib.escapeShellArg service.passwordFile})"
+        admin_password="$(${lib.getExe' pkgs.coreutils "tr"} -d '\n' < ${lib.escapeShellArg service.adminPasswordFile})"
+
+        exec ./PalServer.sh \
+          "$@" \
+          "-serverpassword=$password" \
+          "-adminpassword=$admin_password"
+      '';
+    in
+    {
+      modules.services.steamcmd = {
+        enable = true;
+        inherit (service) steamDir installDir stateDir;
+        serviceName = "palworld-${lib.toLower service.serverName}";
+        appId = 2394010;
+        inherit (service) autoStart;
+        executable = "${startScript}";
+        arguments = [
+          "-useperfthreads"
+          "-NoAsyncLoadingThread"
+          "-UseMultithreadForDS"
+          "-port=${toString service.port}"
+          "-publicport=${toString service.port}"
+          "-servername=${service.serverName}"
+          "-players=${toString service.maxPlayers}"
+        ]
+        ++ lib.optional service.publicLobby "-publiclobby"
+        ++ lib.optionals (service.publicIP != null) [ "-publicip=${service.publicIP}" ]
+        ++ lib.optionals service.rcon.enable [
+          "-rcon"
+          "-RCONPort=${toString service.rcon.port}"
+        ];
+        udpPorts = [ service.port ];
+        tcpPorts = lib.optional service.rcon.enable service.rcon.port;
+      };
+    }
+  );
+}

configs/nixos/modules/services/games/valheim.nix

@@ -0,0 +1,89 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+{
+  options.modules.services.games.valheim = {
+    enable = lib.mkEnableOption "Valheim dedicated server";
+
+    steamDir = lib.mkOption {
+      type = lib.types.str;
+      example = "/data/steamcmd";
+      description = "Directory where SteamCMD stores metadata and cache files.";
+    };
+
+    installDir = lib.mkOption {
+      type = lib.types.str;
+      example = "/data/servers/valheim/main";
+      description = "Directory where SteamCMD installs the Valheim server files.";
+    };
+
+    stateDir = lib.mkOption {
+      type = lib.types.str;
+      example = "/data/state/valheim/main";
+      description = "Directory where Valheim stores world data.";
+    };
+
+    serverName = lib.mkOption {
+      type = lib.types.str;
+      default = "valheim";
+      description = "Name shown for the Valheim server.";
+    };
+
+    port = lib.mkOption {
+      type = lib.types.port;
+      default = 2456;
+      description = "Base UDP port for the Valheim server.";
+    };
+
+    passwordFile = lib.mkOption {
+      type = lib.types.path;
+      description = "Runtime file containing the Valheim server password.";
+    };
+
+  };
+
+  config = lib.mkIf config.modules.services.games.valheim.enable (
+    let
+      service = config.modules.services.games.valheim;
+      startScript = pkgs.writeShellScript "valheim-start" ''
+        set -eu
+
+        password="$(${lib.getExe' pkgs.coreutils "tr"} -d '\n' < ${lib.escapeShellArg service.passwordFile})"
+        exec ./valheim_server.x86_64 "$@" -password "$password"
+      '';
+    in
+    {
+      modules.services.steamcmd = {
+        enable = true;
+        inherit (service) steamDir installDir stateDir;
+        serviceName = "valheim";
+        appId = 896660;
+        executable = "${startScript}";
+        arguments = [
+          "-nographics"
+          "-batchmode"
+          "-name"
+          service.serverName
+          "-port"
+          (toString service.port)
+          "-world"
+          service.serverName
+          "-savedir"
+          service.stateDir
+          "-public"
+          "0"
+          "-modifier"
+          "raids"
+          "none"
+        ];
+        udpPorts = [
+          service.port
+          (service.port + 1)
+        ];
+      };
+    }
+  );
+}

configs/nixos/modules/services/homepage.nix

@@ -0,0 +1,228 @@
+{
+  config,
+  lib,
+  registry,
+  ...
+}:
+let
+  cfg = config.modules.services.homepage;
+
+  derivedAllowedHosts = lib.unique (
+    lib.optional (selfRoute != null) selfRoute.domain
+    ++ lib.optionals (selfAddress != null) [
+      selfAddress
+      "${selfAddress}:${toString cfg.listenPort}"
+    ]
+  );
+  selfRoute = selfEntry.route or null;
+
+  selfEntry = registry.join cfg.hostName cfg.entryName;
+  selfAddress = selfEntry.address or null;
+  homepageServices = map mkTab (lib.filter (tab: lib.hasAttr tab entriesByTab) orderedTabs);
+
+  mkTab =
+    tab:
+    let
+      sections = entriesByTab.${tab};
+    in
+    {
+      ${tab} = map (section: { ${section} = sections.${section}; }) (orderedSections tab sections);
+    };
+
+  entriesByTab = lib.foldl' insertEntry { } sortedEntries;
+
+  insertEntry =
+    acc: item:
+    acc
+    // {
+      ${item.homepage.tab} = (acc.${item.homepage.tab} or { }) // {
+        ${item.homepage.section} = (acc.${item.homepage.tab}.${item.homepage.section} or [ ]) ++ [
+          { ${item.homepage.name} = mkServiceAttrs item; }
+        ];
+      };
+    };
+
+  sortedEntries = lib.sort (left: right: left.homepage.name < right.homepage.name) homepageEntries;
+
+  homepageEntries = lib.concatLists (
+    lib.mapAttrsToList (
+      host: entries:
+      lib.mapAttrsToList (entry: homepage: {
+        inherit host entry homepage;
+        composite = registry.join host entry;
+      }) entries
+    ) registry.homepage
+  );
+
+  orderedTabs = tabOrder ++ lib.filter (tab: !lib.elem tab tabOrder) (lib.attrNames entriesByTab);
+
+  tabOrder = [
+    "Apps"
+    "Download"
+    "System"
+  ];
+
+  mkRegistryPath =
+    registryName: host: entry:
+    "registry.${registryName}.${host}.${entry}";
+
+  mkHref =
+    item:
+    if item.homepage.href != null then
+      item.homepage.href
+    else if (item.composite.route or null) != null then
+      if item.composite.route.protocol == "https" then
+        "https://${item.composite.route.domain}"
+      else if item.composite.route.protocol == "http" then
+        "http://${item.composite.route.domain}"
+      else
+        throw "${mkRegistryPath "homepage" item.host item.entry} needs href or a matching HTTP route entry"
+    else
+      throw "${mkRegistryPath "homepage" item.host item.entry} needs href or a matching route entry";
+
+  mkServiceAttrs =
+    item:
+    lib.filterAttrs (_: value: value != null) {
+      href = mkHref item;
+      inherit (item.homepage) description icon;
+    };
+
+  sectionOrderByTab = {
+    Apps = [
+      "Media"
+      "Files"
+      "Other"
+    ];
+    Download = [
+      "Library Managers"
+      "Other Utilities"
+      "Download Clients"
+    ];
+    System = [
+      "Monitoring"
+      "Network"
+      "Machines"
+      "Docker"
+    ];
+  };
+
+  orderedSections =
+    tab: sections:
+    let
+      sectionOrder = sectionOrderByTab.${tab} or [ ];
+    in
+    lib.filter (section: lib.hasAttr section sections) sectionOrder
+    ++ lib.filter (section: !lib.elem section sectionOrder) (lib.attrNames sections);
+
+in
+{
+  options.modules.services.homepage = {
+    enable = lib.mkEnableOption "Homepage Dashboard";
+
+    listenPort = lib.mkOption {
+      type = lib.types.port;
+      default = 8082;
+      description = "Port for Homepage to bind to.";
+    };
+
+    hostName = lib.mkOption {
+      type = lib.types.str;
+      description = "Host registry key that owns the Homepage guest entry.";
+    };
+
+    entryName = lib.mkOption {
+      type = lib.types.str;
+      default = "homepage";
+      description = "Registry entry name for this Homepage service.";
+    };
+
+    allowedHosts = lib.mkOption {
+      type = lib.types.nullOr (lib.types.listOf lib.types.str);
+      default = null;
+      description = "Host headers accepted by Homepage. Defaults to matching address and route registry entries.";
+    };
+
+    environmentFile = lib.mkOption {
+      type = lib.types.path;
+      default = "/run/secrets/homepage.env";
+      description = "Environment file passed to Homepage.";
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    services.homepage-dashboard = {
+      enable = true;
+      openFirewall = true;
+      inherit (cfg) listenPort;
+      environmentFiles = [ cfg.environmentFile ];
+      allowedHosts = lib.concatStringsSep "," (
+        if cfg.allowedHosts == null then derivedAllowedHosts else cfg.allowedHosts
+      );
+      services = homepageServices;
+      widgets = [
+        {
+          greeting = {
+            text_size = "xl";
+            text = "tracion";
+          };
+        }
+        {
+          openmeteo = {
+            units = "metric";
+            latitude = "{{HOMEPAGE_VAR_LATITUDE}}";
+            longitude = "{{HOMEPAGE_VAR_LONGITUDE}}";
+            cache = 5;
+          };
+        }
+        {
+          datetime = {
+            text_size = "xl";
+            locale = "en";
+            format = {
+              dateStyle = "full";
+              timeStyle = "medium";
+              hour12 = false;
+            };
+          };
+        }
+      ];
+      settings = {
+        title = "Tracion";
+        theme = "dark";
+        color = "slate";
+        showStats = false;
+        hideVersion = true;
+        bookmarksStyle = "icons";
+        useEqualHeights = true;
+        layout = {
+          Apps = {
+            style = "row";
+            columns = 1;
+            tab = "Apps";
+            Media = {
+              style = "row";
+              columns = 2;
+            };
+            Files = {
+              style = "row";
+              columns = 2;
+            };
+            Other = {
+              style = "row";
+              columns = 3;
+              iconsOnly = true;
+            };
+          };
+          Download = {
+            style = "row";
+            columns = 1;
+            tab = "Download";
+          };
+          System = {
+            tab = "System";
+          };
+        };
+      };
+    };
+  };
+}

configs/nixos/modules/services/navidrome.nix

@@ -0,0 +1,64 @@
+{
+  config,
+  lib,
+  ...
+}:
+let
+  cfg = config.modules.services.navidrome;
+in
+{
+  options.modules.services.navidrome = {
+    enable = lib.mkEnableOption "Navidrome";
+
+    dataFolder = lib.mkOption {
+      type = lib.types.str;
+      default = "/var/lib/navidrome";
+      readOnly = true;
+      description = "Path for Navidrome's `DataFolder` setting.";
+    };
+
+    musicFolder = lib.mkOption {
+      type = lib.types.str;
+      default = "/music";
+      readOnly = true;
+      description = "Path for Navidrome's `MusicFolder` setting.";
+    };
+
+    environmentFile = lib.mkOption {
+      type = lib.types.path;
+      default = "/run/secrets/navidrome.env";
+      readOnly = true;
+      description = "Path to Navidrome's environment file.";
+    };
+  };
+
+  config = lib.mkMerge [
+    {
+      registry."stable-uid".${config.networking.hostName}.navidrome = 20004;
+    }
+
+    (lib.mkIf cfg.enable {
+      users.users.navidrome = {
+        isSystemUser = true;
+        uid = config.registry."stable-uid".${config.networking.hostName}.navidrome;
+        group = "storage";
+        home = cfg.dataFolder;
+      };
+
+      services.navidrome = {
+        enable = true;
+        user = "navidrome";
+        group = "storage";
+        openFirewall = true;
+        inherit (cfg) environmentFile;
+        settings = {
+          Address = "0.0.0.0";
+          Port = 4533;
+          DataFolder = cfg.dataFolder;
+          MusicFolder = cfg.musicFolder;
+          EnableSharing = true;
+        };
+      };
+    })
+  ];
+}

configs/nixos/modules/services/reverse-proxy.nix

@@ -5,71 +5,94 @@
   ...
 }:
 let
-  cfg = config.modules.services.reverse-proxy;
 
-  mkRegistryPath = registryName: host: entry: "registry.${registryName}.${host}.${entry}";
-
-  mkBackend = address: route: "http://${address}:${toString route.port}";
-
-  mkVirtualHost = host: entry:
-    let
-      compositeEntry = registry.join host entry;
-      route = compositeEntry.route;
-      address = compositeEntry.address or (throw "no matching entry in registry.address for ${mkRegistryPath "route" host entry}");
-    in
-    {
-      inherit host entry;
-      name = route.domain;
-      value = {
-        forceSSL = true;
-        enableACME = true;
-        locations."/".proxyPass = mkBackend address route;
-      };
-    };
-
-  generatedVirtualHostList = lib.concatLists (
+  generatedUdpStreams = lib.concatLists (
     lib.mapAttrsToList (
       host: routes:
-      lib.mapAttrsToList (entry: _route: mkVirtualHost host entry) routes
+      lib.concatLists (
+        lib.mapAttrsToList (
+          entry: route: lib.optionals (route.protocol == "udp") (map (mkUdpStream host entry) route.ports)
+        ) routes
+      )
     ) registry.route
   );
 
-  virtualHostsByDomain = lib.foldl' (
-    acc: virtualHost:
-    acc
-    // {
-      ${virtualHost.name} = (acc.${virtualHost.name} or [ ]) ++ [ virtualHost ];
-    }
-  ) { } generatedVirtualHostList;
+  mkUdpStream =
+    host: entry: port:
+    let
+      address =
+        compositeEntry.address
+          or (throw "no matching entry in registry.address for ${mkRegistryPath "route" host entry}");
+      compositeEntry = registry.join host entry;
+    in
+    {
+      inherit
+        host
+        entry
+        port
+        address
+        ;
+    };
 
-  duplicateDomainMessages = lib.concatLists (
+  generatedStreamConfig = lib.concatMapStringsSep "\n" (stream: ''
+    server {
+      listen ${toString stream.port} udp;
+      proxy_pass ${stream.address}:${toString stream.port};
+    }
+  '') generatedUdpStreams;
+  generatedVirtualHosts = lib.listToAttrs generatedVirtualHostList;
+
+  # Route registry validation already requires unique domains.
+  generatedVirtualHostList = lib.concatLists (
     lib.mapAttrsToList (
-      domain: virtualHosts:
-      if lib.length virtualHosts > 1 then
-        [
-          "duplicate route domain ${domain} in ${lib.concatMapStringsSep " and " (virtualHost: mkRegistryPath "route" virtualHost.host virtualHost.entry) virtualHosts}"
-        ]
-      else
-        [ ]
-    ) virtualHostsByDomain
+      host: routes:
+      lib.mapAttrsToList (entry: route: mkVirtualHost host entry route.protocol) (
+        lib.filterAttrs (_entry: route: route.protocol != "udp") routes
+      )
+    ) registry.route
   );
 
-  generatedVirtualHosts =
-    if duplicateDomainMessages != [ ] then
-      throw (builtins.head duplicateDomainMessages)
-    else
-      lib.listToAttrs generatedVirtualHostList;
+  mkVirtualHost =
+    host: entry: mode:
+    let
+      isHttp = mode == "http";
+      address =
+        compositeEntry.address
+          or (throw "no matching entry in registry.address for ${mkRegistryPath "route" host entry}");
+      compositeEntry = registry.join host entry;
+      inherit (compositeEntry) route;
+      inherit (route) port;
+    in
+    {
+      name = route.domain;
+      value = {
+        forceSSL = !isHttp;
+        enableACME = !isHttp;
+        extraConfig = lib.optionalString (route.clientMaxBodySize != null) ''
+          client_max_body_size ${route.clientMaxBodySize};
+        '';
+        locations."/".proxyPass = mkBackend address port;
+      };
+    };
+
+  mkBackend = address: port: "http://${address}:${toString port}";
+
+  mkRegistryPath =
+    registryName: host: entry:
+    "registry.${registryName}.${host}.${entry}";
+
 in
 {
   options.modules.services.reverse-proxy = {
     enable = lib.mkEnableOption "the public edge reverse proxy";
   };
 
-  config = lib.mkIf cfg.enable {
+  config = lib.mkIf config.modules.services.reverse-proxy.enable {
     networking.firewall.allowedTCPPorts = [
       80
       443
     ];
+    networking.firewall.allowedUDPPorts = map (stream: stream.port) generatedUdpStreams;
 
     security.acme = {
       acceptTerms = true;
@@ -89,6 +112,7 @@ in
       recommendedOptimisation = true;
       recommendedProxySettings = true;
       recommendedTlsSettings = true;
+      streamConfig = lib.mkIf (generatedUdpStreams != [ ]) generatedStreamConfig;
       virtualHosts = generatedVirtualHosts;
     };
   };

configs/nixos/modules/services/steamcmd.nix

@@ -0,0 +1,190 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+{
+  options.modules.services.steamcmd = {
+    enable = lib.mkEnableOption "SteamCMD-managed game server";
+
+    steamDir = lib.mkOption {
+      type = lib.types.str;
+      example = "/data/steamcmd";
+      description = "Directory where SteamCMD stores metadata and cache files.";
+    };
+
+    serviceName = lib.mkOption {
+      type = lib.types.strMatching "[a-z0-9][a-z0-9-]*";
+      example = "valheim";
+      description = "Lowercase systemd service basename for the game server.";
+    };
+
+    appId = lib.mkOption {
+      type = lib.types.ints.positive;
+      example = 896660;
+      description = "Steam app ID for the dedicated server package.";
+    };
+
+    installDir = lib.mkOption {
+      type = lib.types.str;
+      example = "/data/servers/valheim/main";
+      description = "Directory where SteamCMD installs the server files and where the game service starts.";
+    };
+
+    stateDir = lib.mkOption {
+      type = lib.types.str;
+      example = "/data/state/valheim/main";
+      description = "Writable directory for durable game server state.";
+    };
+
+    executable = lib.mkOption {
+      type = lib.types.str;
+      example = "./valheim_server.x86_64";
+      description = "Server executable, relative to installDir or absolute.";
+    };
+
+    arguments = lib.mkOption {
+      type = lib.types.listOf lib.types.str;
+      default = [ ];
+      example = [
+        "-name"
+        "main"
+      ];
+      description = "Arguments passed to the server executable.";
+    };
+
+    udpPorts = lib.mkOption {
+      type = lib.types.listOf lib.types.port;
+      default = [ ];
+      description = "UDP ports opened for the game service.";
+    };
+
+    tcpPorts = lib.mkOption {
+      type = lib.types.listOf lib.types.port;
+      default = [ ];
+      description = "TCP ports opened for the game service.";
+    };
+
+    autoStart = lib.mkOption {
+      type = lib.types.bool;
+      default = true;
+      description = "Start the game service after the guest reaches network readiness.";
+    };
+  };
+
+  config = lib.mkMerge [
+    {
+      registry."stable-uid".${config.networking.hostName}.steamcmd = 20003;
+    }
+
+    (lib.mkIf config.modules.services.steamcmd.enable (
+      let
+        group = "storage";
+
+        service = config.modules.services.steamcmd;
+        user = "steamcmd";
+        prepareScript = pkgs.writeShellScript "steamcmd-${service.serviceName}-prepare" ''
+          set -eu
+
+          ${lib.getExe' pkgs.coreutils "install"} -d \
+            -o ${user} \
+            -g ${group} \
+            -m 0770 \
+            ${lib.escapeShellArg service.steamDir} \
+            ${lib.escapeShellArg service.installDir} \
+            ${lib.escapeShellArg service.stateDir}
+        '';
+
+        updateScript = pkgs.writeShellScript "steamcmd-${service.serviceName}-update" ''
+          set -eu
+
+          export HOME=${lib.escapeShellArg service.steamDir}
+          exec ${lib.getExe pkgs.steamcmd} \
+            +force_install_dir ${lib.escapeShellArg service.installDir} \
+            +login anonymous \
+            +app_update ${toString service.appId} validate \
+            +quit
+        '';
+
+        startScript = pkgs.writeShellScript "steamcmd-${service.serviceName}-start" ''
+          set -eu
+
+          cd ${lib.escapeShellArg service.installDir}
+          export LD_LIBRARY_PATH=linux64:''${LD_LIBRARY_PATH-}
+          exec ${lib.getExe pkgs.steam-run} ${lib.escapeShellArg service.executable} ${lib.escapeShellArgs service.arguments}
+        '';
+      in
+      {
+        users.users.${user} = {
+          isSystemUser = true;
+          uid = config.registry."stable-uid".${config.networking.hostName}.steamcmd;
+          inherit group;
+          home = service.steamDir;
+        };
+
+        systemd.tmpfiles.rules = [
+          "d ${service.steamDir} 0770 ${user} ${group} - -"
+          "Z ${service.steamDir} 0770 ${user} ${group} - -"
+          "d ${service.installDir} 0770 ${user} ${group} - -"
+          "Z ${service.installDir} 0770 ${user} ${group} - -"
+          "d ${service.stateDir} 0770 ${user} ${group} - -"
+          "Z ${service.stateDir} 0770 ${user} ${group} - -"
+        ];
+
+        systemd.services = {
+          "steamcmd-${service.serviceName}-update" = {
+            description = "Update ${service.serviceName} with SteamCMD";
+            after = [ "network-online.target" ];
+            wants = [ "network-online.target" ];
+            serviceConfig = {
+              Type = "oneshot";
+              User = user;
+              Group = group;
+              WorkingDirectory = "-${service.steamDir}";
+              ExecStartPre = "+${prepareScript}";
+              ExecStart = updateScript;
+              TimeoutStartSec = "15min";
+            };
+          };
+
+          "${service.serviceName}-autostart" = {
+            description = "Queue ${service.serviceName} game server startup";
+            after = [ "network-online.target" ];
+            wants = [ "network-online.target" ];
+            wantedBy = lib.mkIf service.autoStart [ "multi-user.target" ];
+            serviceConfig = {
+              Type = "oneshot";
+              ExecStart = "${lib.getExe' pkgs.systemd "systemctl"} --no-block start ${service.serviceName}.service";
+            };
+          };
+
+          ${service.serviceName} = {
+            description = "${service.serviceName} game server";
+            after = [
+              "network-online.target"
+              "steamcmd-${service.serviceName}-update.service"
+            ];
+            wants = [
+              "network-online.target"
+              "steamcmd-${service.serviceName}-update.service"
+            ];
+            serviceConfig = {
+              Type = "simple";
+              User = user;
+              Group = group;
+              WorkingDirectory = "-${service.installDir}";
+              ExecStartPre = "+${prepareScript}";
+              ExecStart = startScript;
+              Restart = "on-failure";
+              TimeoutStartSec = "15min";
+            };
+          };
+        };
+
+        networking.firewall.allowedUDPPorts = service.udpPorts;
+        networking.firewall.allowedTCPPorts = service.tcpPorts;
+      }
+    ))
+  ];
+}

configs/nixos/modules/shell/bazel.nix

@@ -5,14 +5,11 @@
   ...
 }:
 # Bazel for the primary user's shell environment.
-let
-  cfg = config.modules.shell.bazel;
-  user = config.user.name;
-in
 {
-  options.modules.shell.bazel.enable = lib.mkEnableOption "Bazel for the primary user's shell environment";
+  options.modules.shell.bazel.enable =
+    lib.mkEnableOption "Bazel for the primary user's shell environment";
 
-  config = lib.mkIf cfg.enable {
-    home-manager.users.${user}.home.packages = [ pkgs.bazel ];
+  config = lib.mkIf config.modules.shell.bazel.enable {
+    home-manager.users.${config.user.name}.home.packages = [ pkgs.bazel ];
   };
 }

configs/nixos/modules/shell/direnv/default.nix

@@ -1,26 +0,0 @@
-{
-  config,
-  lib,
-  ...
-}:
-# direnv for the primary user, configured through home-manager.
-let
-  cfg = config.modules.shell.direnv;
-  user = config.user.name;
-in
-{
-  options.modules.shell.direnv.enable =
-    lib.mkEnableOption "direnv for the primary user, with nix-direnv shell caching";
-
-  config = lib.mkIf cfg.enable {
-    home-manager.users.${user}.programs.direnv = {
-      enable = true;
-      silent = true;
-
-      # nix-direnv caches the evaluated shell so re-entering a directory is instant
-      # instead of re-running `nix develop`, and adds the `use flake` stdlib helper.
-      nix-direnv.enable = true;
-      stdlib = builtins.readFile ./repo-flake.sh;
-    };
-  };
-}

configs/nixos/modules/shell/direnv/repo-flake.sh

@@ -1,33 +0,0 @@
-if declare -f use_flake >/dev/null; then
-  __dotfiles_use_flake_definition="$(declare -f use_flake)"
-  eval "${__dotfiles_use_flake_definition/use_flake/__dotfiles_nix_direnv_use_flake}"
-  unset __dotfiles_use_flake_definition
-
-  use_flake() {
-    local flake_expr="${1:-.}"
-
-    if [[ "$flake_expr" == //* ]]; then
-      local git_root
-      if ! git_root="$(git rev-parse --show-toplevel 2>/dev/null)"; then
-        log_error 'use flake // requires a Git repository'
-        return 1
-      fi
-
-      local flake_suffix="${flake_expr#//}"
-      if [[ -n "$flake_suffix" && "$flake_suffix" != \#* && "$flake_suffix" != /* ]]; then
-        flake_expr="path:${git_root}/${flake_suffix}"
-      else
-        flake_expr="path:${git_root}${flake_suffix}"
-      fi
-
-      shift
-      __dotfiles_nix_direnv_use_flake "$flake_expr" "$@"
-      return
-    fi
-
-    __dotfiles_nix_direnv_use_flake "$@"
-  }
-else
-  log_error 'nix-direnv must define use_flake before the // wrapper loads'
-  return 1
-fi

configs/nixos/modules/shell/fish/default.nix

@@ -7,13 +7,9 @@
 # fish for the primary user, configured through home-manager.
 let
   cfg = config.modules.shell.fish;
-  user = config.user.name;
-  shortcuts = lib.attrByPath [ config.networking.hostName ] { } config.registry.shell-shortcut;
-  envVars = lib.attrByPath [ config.networking.hostName ] { } config.registry.env-var;
   commandsOf = shortcuts: lib.mapAttrs (_name: shortcut: shortcut.command) shortcuts;
-  exportEnvVar = name: value: ''
-    set -gx ${name} ${lib.escapeShellArg value}
-  '';
+  shortcuts = lib.attrByPath [ config.networking.hostName ] { } config.registry.shell-shortcut;
+  user = config.user.name;
 in
 {
   options.modules.shell.fish = {
@@ -99,21 +95,14 @@ in
           };
 
           deploy-to = {
-            description = "Deploy the current dotfiles branch to a host through target-local nixos-rebuild";
+            description = "Build the current checkout locally, import it on a host, and activate it";
             body = builtins.readFile ./functions/deploy-to.fish;
           };
 
-          devtree = {
-            description = "Manage alexion/dev git worktrees";
-            body = builtins.readFile ./functions/devtree.fish;
-          };
         };
 
         # Rendered by home-manager into ~/.config/fish/config.fish.
-        interactiveShellInit = lib.concatStringsSep "\n" (
-          (lib.mapAttrsToList exportEnvVar envVars)
-          ++ [ (builtins.readFile ./config.fish) ]
-        );
+        interactiveShellInit = builtins.readFile ./config.fish;
       };
     };
   };

configs/nixos/modules/shell/fish/functions/deploy-to.fish

@@ -1,19 +1,9 @@
-if test (count $argv) -lt 1; or test (count $argv) -gt 2
-    echo "usage: deploy-to <host> [branch]" >&2
+if test (count $argv) -ne 1
+    echo "usage: deploy-to <host>" >&2
     return 2
 end
 
 set host $argv[1]
-set branch $argv[2]
-
-if test -z "$branch"
-    set branch (git branch --show-current)
-end
-
-if test -z "$branch"
-    echo "deploy-to: could not determine the current branch" >&2
-    return 2
-end
 
 git rev-parse --show-toplevel >/dev/null 2>&1
 or begin
@@ -21,33 +11,85 @@ or begin
     return 2
 end
 
-set dirty_lines (git status --porcelain)
-if test (count $dirty_lines) -gt 0
-    echo "deploy-to: refusing to deploy with a dirty local worktree" >&2
-    return 1
-end
-
-git fetch origin
+set repository_root (git rev-parse --show-toplevel)
 or return $status
 
-set remote_ref refs/remotes/origin/$branch
-git rev-parse --verify --quiet $remote_ref >/dev/null
+set untracked_nix_files (git -C $repository_root ls-files --others --exclude-standard -- '*.nix' flake.nix flake.lock)
+if test (count $untracked_nix_files) -gt 0
+    echo "deploy-to: warning: untracked Nix files are not part of Git flake evaluation" >&2
+    printf '  %s\n' $untracked_nix_files >&2
+end
+
+set installable "$repository_root#nixosConfigurations.$host.config.system.build.toplevel"
+
+echo "deploy-to: building $installable" >&2
+set system_path (nix build --no-link --print-out-paths $installable)
 or begin
-    echo "deploy-to: origin/$branch does not exist" >&2
+    echo "deploy-to: build failed for $host" >&2
+    return $status
+end
+
+if test (count $system_path) -ne 1
+    echo "deploy-to: expected one build output, got "(count $system_path) >&2
     return 1
 end
 
-set local_head (git rev-parse HEAD)
-set remote_head (git rev-parse $remote_ref)
-
-if test "$local_head" != "$remote_head"
-    echo "deploy-to: local HEAD differs from origin/$branch" >&2
-    echo "deploy-to: push or reset the branch before deploying" >&2
-    return 1
+set closure_paths (nix-store -qR $system_path)
+or begin
+    echo "deploy-to: closure query failed for $host" >&2
+    return $status
 end
 
-set escaped_branch (string escape -- $branch)
-set escaped_host (string escape -- $host)
-set remote_command "cd ~/dev && git fetch origin && git switch -- $escaped_branch && git reset --hard origin/$escaped_branch && sudo nixos-rebuild switch --flake .#$escaped_host --print-build-logs"
+echo "deploy-to: checking which closure paths $host is missing" >&2
+set missing_paths (printf '%s\n' $closure_paths | ssh $host 'xargs -r nix-store --check-validity --print-invalid')
+or begin
+    echo "deploy-to: remote closure check failed for $host" >&2
+    return $status
+end
 
-ssh -t $host $remote_command
+if test (count $missing_paths) -gt 0
+    set nar_file (mktemp --suffix=.nar)
+    or return $status
+    set remote_nar "/tmp/deploy-to-$host-"(date +%s)"-$fish_pid.nar"
+
+    echo "deploy-to: exporting "(count $missing_paths)" missing closure paths for $system_path" >&2
+    nix-store --export $missing_paths >$nar_file
+    or begin
+        set export_status $status
+        rm -f $nar_file
+        echo "deploy-to: closure export failed for $host" >&2
+        return $export_status
+    end
+
+    echo "deploy-to: copying closure archive to $host:$remote_nar" >&2
+    scp $nar_file $host:$remote_nar
+    set scp_status $status
+    rm -f $nar_file
+    if test $scp_status -ne 0
+        echo "deploy-to: closure archive copy failed for $host" >&2
+        return $scp_status
+    end
+
+    echo "deploy-to: importing closure on $host" >&2
+    ssh -t $host "sudo sh -c 'nix-store --import < $remote_nar' && rm -f $remote_nar"
+    or begin
+        echo "deploy-to: closure import failed for $host" >&2
+        return $status
+    end
+else
+    echo "deploy-to: $host already has the full closure for $system_path" >&2
+end
+
+echo "deploy-to: recording $system_path as the system profile on $host" >&2
+ssh -t $host sudo nix-env --profile /nix/var/nix/profiles/system --set $system_path
+or begin
+    echo "deploy-to: system profile update failed for $host" >&2
+    return $status
+end
+
+echo "deploy-to: activating $system_path on $host" >&2
+ssh -t $host sudo "$system_path/bin/switch-to-configuration" switch
+or begin
+    echo "deploy-to: activation failed for $host" >&2
+    return $status
+end

configs/nixos/modules/shell/fish/functions/devtree.fish

@@ -1,273 +0,0 @@
-set main_checkout ~/dev
-set worktree_root ~/worktrees/dev
-set base_branch main
-set remote origin
-
-function __devtree_usage --no-scope-shadowing
-    echo "usage: devtree <command> [args]" >&2
-    echo "commands:" >&2
-    echo "  new <branch>       create a branch worktree from main and cd into it" >&2
-    echo "  cd <branch>        cd into an existing worktree" >&2
-    echo "  list               list worktrees" >&2
-    echo "  sync [<branch>]    fast-forward main, then rebase branch onto main" >&2
-    echo "  sync --all         fast-forward main, then rebase clean topic worktrees onto main" >&2
-    echo "  remove <branch>    remove a clean worktree, keeping the branch" >&2
-    echo "  prune [--dry-run]  prune worktree metadata and stale merged local branches" >&2
-end
-
-function __devtree_path_for_branch --no-scope-shadowing --argument-names branch
-    set current_path ""
-    for line in (git -C $main_checkout worktree list --porcelain)
-        if string match -q 'worktree *' -- $line
-            set current_path (string replace 'worktree ' '' -- $line)
-        else if test "$line" = "branch refs/heads/$branch"
-            echo $current_path
-            return 0
-        end
-    end
-
-    return 1
-end
-
-function __devtree_checked_out_branches --no-scope-shadowing
-    for line in (git -C $main_checkout worktree list --porcelain)
-        if string match -q 'branch refs/heads/*' -- $line
-            string replace 'branch refs/heads/' '' -- $line
-        end
-    end
-end
-
-function __devtree_update_main --no-scope-shadowing
-    if not test -d $main_checkout/.git
-        echo "devtree: main checkout not found at $main_checkout" >&2
-        return 1
-    end
-
-    set dirty_lines (git -C $main_checkout status --porcelain)
-    if test (count $dirty_lines) -gt 0
-        echo "devtree: refusing to update dirty main checkout: $main_checkout" >&2
-        return 1
-    end
-
-    git -C $main_checkout fetch --prune $remote
-    or return $status
-
-    git -C $main_checkout switch $base_branch
-    or return $status
-
-    git -C $main_checkout merge --ff-only $remote/$base_branch
-end
-
-function __devtree_sync_branch --no-scope-shadowing --argument-names branch
-    if test "$branch" = "$base_branch"
-        echo "$branch: already updated"
-        return 0
-    end
-
-    set path (__devtree_path_for_branch $branch)
-    if test -z "$path"
-        echo "devtree: no worktree found for branch '$branch'" >&2
-        return 1
-    end
-
-    set dirty_lines (git -C $path status --porcelain)
-    if test (count $dirty_lines) -gt 0
-        echo "$branch: skipped: dirty ($path)"
-        return 0
-    end
-
-    echo "$branch: rebasing onto $base_branch"
-    git -C $path rebase $base_branch
-end
-
-if test (count $argv) -eq 0
-    __devtree_usage
-    return 2
-end
-
-set command $argv[1]
-set args $argv[2..-1]
-
-switch $command
-    case new
-        if test (count $args) -ne 1
-            echo "usage: devtree new <branch>" >&2
-            return 2
-        end
-
-        set branch $args[1]
-        set path $worktree_root/(string replace -a / __ $branch)
-
-        if git -C $main_checkout show-ref --verify --quiet refs/heads/$branch
-            echo "devtree: branch already exists: $branch" >&2
-            return 1
-        end
-
-        if test -e $path
-            echo "devtree: worktree path already exists: $path" >&2
-            return 1
-        end
-
-        __devtree_update_main
-        or return $status
-
-        mkdir -p $worktree_root
-        or return $status
-
-        git -C $main_checkout worktree add -b $branch $path $base_branch
-        or return $status
-
-        cd $path
-
-    case cd
-        if test (count $args) -ne 1
-            echo "usage: devtree cd <branch>" >&2
-            return 2
-        end
-
-        set path (__devtree_path_for_branch $args[1])
-        if test -z "$path"
-            echo "devtree: no worktree found for branch '$args[1]'" >&2
-            return 1
-        end
-
-        cd $path
-
-    case list
-        if test (count $args) -ne 0
-            echo "usage: devtree list" >&2
-            return 2
-        end
-
-        git -C $main_checkout worktree list
-
-    case sync
-        if test (count $args) -gt 1
-            echo "usage: devtree sync [<branch>]" >&2
-            echo "       devtree sync --all" >&2
-            return 2
-        end
-
-        __devtree_update_main
-        or return $status
-
-        if test (count $args) -eq 1; and test "$args[1]" = --all
-            set current_path ""
-            set branches
-            for line in (git -C $main_checkout worktree list --porcelain)
-                if string match -q 'worktree *' -- $line
-                    set current_path (string replace 'worktree ' '' -- $line)
-                else if string match -q 'branch refs/heads/*' -- $line
-                    set branch (string replace 'branch refs/heads/' '' -- $line)
-                    if test "$branch" != "$base_branch"
-                        set --append branches $branch
-                    end
-                end
-            end
-
-            for branch in $branches
-                __devtree_sync_branch $branch
-                or return $status
-            end
-        else
-            if test (count $args) -eq 1
-                set branch $args[1]
-            else
-                git rev-parse --show-toplevel >/dev/null 2>&1
-                or begin
-                    echo "devtree: run 'devtree sync' from a git checkout, or pass a branch" >&2
-                    return 2
-                end
-
-                set branch (git branch --show-current)
-                if test -z "$branch"
-                    echo "devtree: could not determine the current branch" >&2
-                    return 2
-                end
-            end
-
-            __devtree_sync_branch $branch
-        end
-
-    case remove
-        if test (count $args) -ne 1
-            echo "usage: devtree remove <branch>" >&2
-            return 2
-        end
-
-        set branch $args[1]
-        if test "$branch" = "$base_branch"
-            echo "devtree: refusing to remove $base_branch" >&2
-            return 1
-        end
-
-        set path (__devtree_path_for_branch $branch)
-        if test -z "$path"
-            echo "devtree: no worktree found for branch '$branch'" >&2
-            return 1
-        end
-
-        set dirty_lines (git -C $path status --porcelain)
-        if test (count $dirty_lines) -gt 0
-            echo "devtree: refusing to remove dirty worktree: $path" >&2
-            return 1
-        end
-
-        git -C $main_checkout worktree remove $path
-
-    case prune
-        set dry_run false
-        if test (count $args) -gt 1
-            echo "usage: devtree prune [--dry-run]" >&2
-            return 2
-        else if test (count $args) -eq 1
-            if test "$args[1]" = --dry-run
-                set dry_run true
-            else
-                echo "usage: devtree prune [--dry-run]" >&2
-                return 2
-            end
-        end
-
-        git -C $main_checkout worktree prune
-        or return $status
-
-        git -C $main_checkout fetch --prune $remote
-        or return $status
-
-        set checked_out (__devtree_checked_out_branches)
-        for line in (git -C $main_checkout for-each-ref --format='%(refname:short)|%(upstream:track)' refs/heads)
-            set parts (string split '|' -- $line)
-            set branch $parts[1]
-            set upstream_track $parts[2]
-
-            if test "$branch" = "$base_branch"
-                continue
-            end
-
-            if contains -- $branch $checked_out
-                continue
-            end
-
-            if not string match -q '*gone*' -- $upstream_track
-                continue
-            end
-
-            if not git -C $main_checkout merge-base --is-ancestor $branch $base_branch
-                echo "$branch: skipped: not merged into $base_branch"
-                continue
-            end
-
-            if test "$dry_run" = true
-                echo "$branch: would delete"
-            else
-                git -C $main_checkout branch -d $branch
-                or return $status
-            end
-        end
-
-    case '*'
-        echo "devtree: unknown command: $command" >&2
-        __devtree_usage
-        return 2
-end

configs/nixos/modules/shell/git.nix

@@ -5,14 +5,13 @@
 }:
 # git for the primary user, configured through home-manager.
 let
-  cfg = config.modules.shell.git;
   user = config.user.name;
 in
 {
   options.modules.shell.git.enable =
     lib.mkEnableOption "git for the primary user, carrying the operator's commit identity";
 
-  config = lib.mkIf cfg.enable {
+  config = lib.mkIf config.modules.shell.git.enable {
     home-manager.users.${user}.programs.git = {
       enable = true;
 

configs/nixos/modules/shell/gitea-axi.nix

@@ -6,14 +6,13 @@
 }:
 # gitea-axi for the primary user, installed through its own home-manager module.
 let
-  cfg = config.modules.shell.gitea-axi;
   user = config.user.name;
 in
 {
   options.modules.shell.gitea-axi.enable =
     lib.mkEnableOption "gitea-axi, an agent-ergonomic CLI for Gitea issues and pull requests";
 
-  config = lib.mkIf cfg.enable {
+  config = lib.mkIf config.modules.shell.gitea-axi.enable {
     home-manager.sharedModules = [ inputs.gitea-axi.homeModules.default ];
     home-manager.users.${user}.programs.gitea-axi.enable = true;
   };

configs/nixos/modules/shell/herdr.nix

@@ -6,42 +6,58 @@
 }:
 # Herdr, a terminal multiplexer for coding agents.
 let
-  cfg = config.modules.shell.herdr;
   user = config.user.name;
 in
 {
-  options.modules.shell.herdr.enable = lib.mkEnableOption "Herdr, a terminal multiplexer for coding agents";
+  options.modules.shell.herdr.enable =
+    lib.mkEnableOption "Herdr, a terminal multiplexer for coding agents";
 
-  config = lib.mkIf cfg.enable {
+  config = lib.mkIf config.modules.shell.herdr.enable {
     registry.shell-shortcut.${config.networking.hostName}.hs = "herdr --session";
 
-    home-manager.users.${user} = {
-      home.packages = [ pkgs.herdr ];
+    home-manager.users.${user} = lib.mkMerge [
+      {
+        home.packages = [ pkgs.herdr ];
 
-      xdg.configFile."herdr/config.toml".text = ''
-        [keys]
-        prefix = "ctrl+space"
-        detach = "prefix+d"
-        reload_config = "prefix+r"
-        new_workspace = "prefix+c"
-        new_tab = "prefix+shift+c"
-        rename_workspace = "prefix+comma"
-        rename_tab = "prefix+<"
-        split_vertical = "prefix+backslash"
-        split_horizontal = "prefix+minus"
-        switch_workspace = "prefix+1..9"
-        switch_tab = "prefix+shift+1..9"
-        focus_pane_left = "prefix+h"
-        focus_pane_down = "prefix+j"
-        focus_pane_up = "prefix+k"
-        focus_pane_right = "prefix+l"
+        xdg.configFile."herdr/config.toml".text = ''
+          onboarding = false
 
-        [ui]
-        prompt_new_tab_name = false
+          [keys]
+          prefix = "ctrl+space"
+          detach = "prefix+d"
+          reload_config = "prefix+r"
+          new_workspace = "prefix+c"
+          new_tab = "prefix+shift+c"
+          rename_workspace = "prefix+comma"
+          rename_tab = "prefix+<"
+          split_vertical = "prefix+backslash"
+          split_horizontal = "prefix+minus"
+          switch_workspace = "prefix+1..9"
+          switch_tab = "prefix+shift+1..9"
+          focus_pane_left = "prefix+h"
+          focus_pane_down = "prefix+j"
+          focus_pane_up = "prefix+k"
+          focus_pane_right = "prefix+l"
 
-        [experimental]
-        kitty_graphics = true
-      '';
-    };
+          [ui]
+          prompt_new_tab_name = false
+
+          [experimental]
+          kitty_graphics = true
+        '';
+      }
+      (lib.mkIf config.modules.shell.pi.enable {
+        home.file.".pi/agent/extensions/herdr-agent-state.ts" = {
+          source = "${pkgs.herdr.src}/src/integration/assets/pi/herdr-agent-state.ts";
+          force = true;
+        };
+      })
+      (lib.mkIf config.modules.shell.omp.enable {
+        home.file.".omp/agent/extensions/herdr-omp-agent-state.ts" = {
+          source = "${pkgs.herdr.src}/src/integration/assets/omp/herdr-agent-state.ts";
+          force = true;
+        };
+      })
+    ];
   };
 }

configs/nixos/modules/shell/nvim/config.lua

@@ -6,6 +6,31 @@ require("nord").setup({
 })
 vim.cmd.colorscheme("nord")
 
+-- Keep floating windows distinct from the current line highlight.
+vim.api.nvim_set_hl(0, "NormalFloat", { bg = "#2e3440" })
+vim.api.nvim_set_hl(0, "FloatBorder", { fg = "#88c0d0", bg = "#2e3440" })
+
+local open_floating_preview = vim.lsp.util.open_floating_preview
+vim.lsp.util.open_floating_preview = function(contents, syntax, opts, ...)
+  opts = opts or {}
+  opts.border = opts.border or "rounded"
+  return open_floating_preview(contents, syntax, opts, ...)
+end
+
+-- Format Rust buffers before writing them.
+vim.api.nvim_create_autocmd("BufWritePre", {
+  pattern = "*.rs",
+  callback = function(args)
+    vim.lsp.buf.format({
+      bufnr = args.buf,
+      timeout_ms = 2000,
+      filter = function(client)
+        return client.name == "rust_analyzer"
+      end,
+    })
+  end,
+})
+
 -- Conceal markdown syntax in markdown buffers.
 -- conceallevel is window-local, so it is set with opt_local when the filetype
 -- is applied to the buffer's window.

configs/nixos/modules/shell/nvim/default.nix

@@ -7,13 +7,13 @@
 }:
 # Neovim for the primary user, configured declaratively through nixvim.
 let
-  cfg = config.modules.shell.nvim;
   user = config.user.name;
 in
 {
-  options.modules.shell.nvim.enable = lib.mkEnableOption "Neovim, configured declaratively via nixvim";
+  options.modules.shell.nvim.enable =
+    lib.mkEnableOption "Neovim, configured declaratively via nixvim";
 
-  config = lib.mkIf cfg.enable {
+  config = lib.mkIf config.modules.shell.nvim.enable {
     registry.shell-shortcut.${config.networking.hostName} = {
       vi = "nvim";
       vim = "nvim";
@@ -31,6 +31,7 @@ in
           ripgrep # backs the picker's live grep
           fd # backs the picker's file finder
           wl-clipboard # provides a non-blocking clipboard provider on Wayland
+          nixd # provides Nix language-server support
         ];
 
         globals.mapleader = " ";
@@ -142,6 +143,56 @@ in
         ];
 
         plugins = {
+          blink-cmp = {
+            enable = true;
+            setupLspCapabilities = true;
+            settings = {
+              keymap = {
+                preset = "default";
+                "<M-Space>" = [
+                  "show"
+                  "show_documentation"
+                  "hide_documentation"
+                ];
+              };
+              completion.documentation.auto_show = true;
+              signature.enabled = true;
+              sources.default = [
+                "lsp"
+                "path"
+                "snippets"
+                "buffer"
+              ];
+            };
+          };
+
+          lsp = {
+            enable = true;
+            inlayHints = true;
+            keymaps = {
+              silent = true;
+              diagnostic = {
+                "[d" = "goto_prev";
+                "]d" = "goto_next";
+              };
+              lspBuf = {
+                gd = "definition";
+                gD = "references";
+                K = "hover";
+                "<leader>ca" = "code_action";
+                "<leader>rn" = "rename";
+              };
+            };
+            servers.rust_analyzer = lib.mkIf config.modules.shell.rust.enable {
+              enable = true;
+              installCargo = false;
+              installRustc = false;
+              installRustfmt = false;
+            };
+
+            servers.nixd.enable = true;
+          };
+
           gitsigns = {
             enable = true;
             settings.current_line_blame = false;

configs/nixos/modules/shell/omp.nix

@@ -0,0 +1,19 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+# Oh My Pi, installed alongside upstream Pi as the `omp` command.
+let
+  user = config.user.name;
+in
+{
+  options.modules.shell.omp = {
+    enable = lib.mkEnableOption "Oh My Pi, a batteries-included fork of Pi";
+  };
+
+  config = lib.mkIf config.modules.shell.omp.enable {
+    home-manager.users.${user}.home.packages = [ pkgs.omp ];
+  };
+}

configs/nixos/modules/shell/pi/default.nix

@@ -8,31 +8,22 @@
 # home-manager, which ships the package and manages global settings.
 # The login credential is left unmanaged, so it survives rebuilds.
 let
-  cfg = config.modules.shell.pi;
   user = config.user.name;
   piDir = "${config.users.users.${user}.home}/.pi/agent";
-  patchedPi = pkgs.pi-coding-agent.overrideAttrs (old: {
-    patches = (old.patches or [ ]) ++ [
-      ./patches/pi-project-resource-ancestors.patch
-      ./patches/pi-tool-lookup-validation.patch
-    ];
-  });
 in
 {
-  options.modules.shell.pi = {
-    enable = lib.mkEnableOption ''
-      Pi, a terminal coding agent, configured through home-manager'';
-  };
+  options.modules.shell.pi.enable =
+    lib.mkEnableOption "Pi, a terminal coding agent, configured through home-manager";
 
-  config = lib.mkIf cfg.enable {
+  config = lib.mkIf config.modules.shell.pi.enable {
     home-manager.users.${user} = {
       programs.pi-coding-agent = {
         enable = true;
-        package = patchedPi;
+        package = pkgs.alexion.pi-coding-agent;
 
         settings = {
           defaultProvider = "openai-codex";
-          defaultModel = "gpt-5.5";
+          defaultModel = "gpt-5.6-terra";
           defaultThinkingLevel = "medium";
           theme = "dark";
           enableInstallTelemetry = false;

configs/nixos/modules/shell/pi/patches/pi-project-resource-ancestors.patch

@@ -1,140 +0,0 @@
-diff --git a/packages/coding-agent/src/core/package-manager.ts b/packages/coding-agent/src/core/package-manager.ts
---- a/packages/coding-agent/src/core/package-manager.ts
-+++ b/packages/coding-agent/src/core/package-manager.ts
-@@ -459,14 +459,14 @@ function findGitRepoRoot(startDir: string): string | null {
- 	}
- }
- 
--function collectAncestorAgentsSkillDirs(startDir: string): string[] {
--	const skillDirs: string[] = [];
-+function collectAncestorConfigDirs(startDir: string, configDirName: string): string[] {
-+	const configDirs: string[] = [];
- 	const resolvedStartDir = resolve(startDir);
- 	const gitRepoRoot = findGitRepoRoot(resolvedStartDir);
- 
- 	let dir = resolvedStartDir;
- 	while (true) {
--		skillDirs.push(join(dir, ".agents", "skills"));
-+		configDirs.push(join(dir, configDirName));
- 		if (gitRepoRoot && dir === gitRepoRoot) {
- 			break;
- 		}
-@@ -477,7 +477,7 @@ function collectAncestorAgentsSkillDirs(startDir: string): string[] {
- 		dir = parent;
- 	}
- 
--	return skillDirs;
-+	return configDirs;
- }
- 
- function collectAutoPromptEntries(dir: string): string[] {
-@@ -2388,16 +2388,13 @@ export class DefaultPackageManager implements PackageManager {
- 			prompts: join(globalBaseDir, "prompts"),
- 			themes: join(globalBaseDir, "themes"),
- 		};
--		const projectDirs = {
--			extensions: join(projectBaseDir, "extensions"),
--			skills: join(projectBaseDir, "skills"),
--			prompts: join(projectBaseDir, "prompts"),
--			themes: join(projectBaseDir, "themes"),
--		};
- 		const userAgentsSkillsDir = join(getHomeDir(), ".agents", "skills");
- 		const projectTrusted = this.settingsManager.isProjectTrusted();
--		const projectAgentsSkillDirs = projectTrusted
--			? collectAncestorAgentsSkillDirs(this.cwd).filter((dir) => resolve(dir) !== resolve(userAgentsSkillsDir))
-+		const projectConfigDirs = projectTrusted
-+			? collectAncestorConfigDirs(this.cwd, CONFIG_DIR_NAME).filter((dir) => resolve(dir) !== resolve(globalBaseDir))
-+			: [];
-+		const projectAgentsDirs = projectTrusted
-+			? collectAncestorConfigDirs(this.cwd, ".agents").filter((dir) => resolve(dir) !== resolve(dirname(userAgentsSkillsDir)))
- 			: [];
- 
- 		const addResources = (
-@@ -2414,56 +2411,54 @@ export class DefaultPackageManager implements PackageManager {
- 			}
- 		};
- 
--		if (projectTrusted) {
--			// Project extensions from .pi/
-+		// Project resources from .pi/ in cwd and ancestors.
-+		for (const configDir of projectConfigDirs) {
-+			const configMetadata: PathMetadata = {
-+				...projectMetadata,
-+				baseDir: configDir,
-+			};
- 			addResources(
- 				"extensions",
--				collectAutoExtensionEntries(projectDirs.extensions),
--				projectMetadata,
-+				collectAutoExtensionEntries(join(configDir, "extensions")),
-+				configMetadata,
- 				projectOverrides.extensions,
--				projectBaseDir,
-+				configDir,
- 			);
--
--			// Project skills from .pi/
- 			addResources(
- 				"skills",
--				collectAutoSkillEntries(projectDirs.skills, "pi"),
--				projectMetadata,
-+				collectAutoSkillEntries(join(configDir, "skills"), "pi"),
-+				configMetadata,
- 				projectOverrides.skills,
--				projectBaseDir,
-+				configDir,
-+			);
-+			addResources(
-+				"prompts",
-+				collectAutoPromptEntries(join(configDir, "prompts")),
-+				configMetadata,
-+				projectOverrides.prompts,
-+				configDir,
-+			);
-+			addResources(
-+				"themes",
-+				collectAutoThemeEntries(join(configDir, "themes")),
-+				configMetadata,
-+				projectOverrides.themes,
-+				configDir,
- 			);
- 		}
- 
--		// Project skills from .agents/ (each with its own baseDir)
--		for (const agentsSkillsDir of projectAgentsSkillDirs) {
--			const agentsBaseDir = dirname(agentsSkillsDir); // the .agents directory
-+		// Project skills from .agents/ in cwd and ancestors.
-+		for (const agentsDir of projectAgentsDirs) {
- 			const agentsMetadata: PathMetadata = {
- 				...projectMetadata,
--				baseDir: agentsBaseDir,
-+				baseDir: agentsDir,
- 			};
- 			addResources(
- 				"skills",
--				collectAutoSkillEntries(agentsSkillsDir, "agents"),
-+				collectAutoSkillEntries(join(agentsDir, "skills"), "agents"),
- 				agentsMetadata,
- 				projectOverrides.skills,
--				agentsBaseDir,
--			);
--		}
--
--		if (projectTrusted) {
--			addResources(
--				"prompts",
--				collectAutoPromptEntries(projectDirs.prompts),
--				projectMetadata,
--				projectOverrides.prompts,
--				projectBaseDir,
--			);
--			addResources(
--				"themes",
--				collectAutoThemeEntries(projectDirs.themes),
--				projectMetadata,
--				projectOverrides.themes,
--				projectBaseDir,
-+				agentsDir,
- 			);
- 		}
- 

configs/nixos/modules/shell/pi/patches/pi-tool-lookup-validation.patch

@@ -1,23 +0,0 @@
-diff --git a/packages/coding-agent/src/utils/tools-manager.ts b/packages/coding-agent/src/utils/tools-manager.ts
---- a/packages/coding-agent/src/utils/tools-manager.ts	2026-08-01 18:41:36.970496010 -0400
-+++ b/packages/coding-agent/src/utils/tools-manager.ts	2026-08-01 18:41:37.028186009 -0400
-@@ -74,8 +74,8 @@
- function commandExists(cmd: string): boolean {
- 	try {
- 		const result = spawnSync(cmd, ["--version"], { stdio: "pipe" });
--		// Check for ENOENT error (command not found)
--		return result.error === undefined || result.error === null;
-+		// Downloaded generic Linux binaries can exist but fail on NixOS before they print a version.
-+		return (result.error === undefined || result.error === null) && result.status === 0;
- 	} catch {
- 		return false;
- 	}
-@@ -88,7 +87,7 @@
- 
- 	// Check our tools directory first
- 	const localPath = join(TOOLS_DIR, config.binaryName + (platform() === "win32" ? ".exe" : ""));
--	if (existsSync(localPath)) {
-+	if (existsSync(localPath) && commandExists(localPath)) {
- 		return localPath;
- 	}
- 

configs/nixos/modules/shell/python.nix

@@ -6,14 +6,14 @@
 }:
 # Python tools for the primary user's shell environment.
 let
-  cfg = config.modules.shell.python;
   user = config.user.name;
 in
 {
-  options.modules.shell.python.enable = lib.mkEnableOption "Python tools for the primary user's shell environment";
+  options.modules.shell.python.enable =
+    lib.mkEnableOption "Python tools for the primary user's shell environment";
 
-  config = lib.mkIf cfg.enable {
-    registry.env-var.${config.networking.hostName}.PYTHON_TOOLCHAIN_ROOT = "${pkgs.python3}";
+  config = lib.mkIf config.modules.shell.python.enable {
+    registry.env.${config.networking.hostName}.PYTHON_TOOLCHAIN_ROOT = "${pkgs.python3}";
 
     home-manager.users.${user}.home.packages = [ pkgs.python3 ];
   };

configs/nixos/modules/shell/rust.nix

@@ -6,8 +6,6 @@
 }:
 # Rust tools for the primary user's shell environment.
 let
-  cfg = config.modules.shell.rust;
-  user = config.user.name;
   toolchain = pkgs.symlinkJoin {
     name = "rust-toolchain";
     paths = with pkgs; [
@@ -18,12 +16,14 @@ let
       rustfmt
     ];
   };
+  user = config.user.name;
 in
 {
-  options.modules.shell.rust.enable = lib.mkEnableOption "Rust tools for the primary user's shell environment";
+  options.modules.shell.rust.enable =
+    lib.mkEnableOption "Rust tools for the primary user's shell environment";
 
-  config = lib.mkIf cfg.enable {
-    registry.env-var.${config.networking.hostName}.RUST_TOOLCHAIN_ROOT = "${toolchain}";
+  config = lib.mkIf config.modules.shell.rust.enable {
+    registry.env.${config.networking.hostName}.RUST_TOOLCHAIN_ROOT = "${toolchain}";
 
     home-manager.users.${user} = {
       home.packages = [

configs/nixos/modules/shell/tmux/default.nix

@@ -6,13 +6,12 @@
 # tmux for the primary user, configured through home-manager.
 # Settings without a home-manager option are read from ./extra.conf.
 let
-  cfg = config.modules.shell.tmux;
   user = config.user.name;
 in
 {
   options.modules.shell.tmux.enable = lib.mkEnableOption "tmux, configured via home-manager";
 
-  config = lib.mkIf cfg.enable {
+  config = lib.mkIf config.modules.shell.tmux.enable {
     registry.shell-shortcut.${config.networking.hostName}.tmx = "tmux new-session -A -s";
 
     home-manager.users.${user}.programs.tmux = {

configs/nixos/modules/shell/yazi.nix

@@ -6,13 +6,12 @@
 }:
 # Yazi, a terminal file manager.
 let
-  cfg = config.modules.shell.yazi;
   user = config.user.name;
 in
 {
   options.modules.shell.yazi.enable = lib.mkEnableOption "Yazi, a terminal file manager";
 
-  config = lib.mkIf cfg.enable {
+  config = lib.mkIf config.modules.shell.yazi.enable {
     home-manager.users.${user}.programs.yazi = {
       enable = true;
       enableFishIntegration = true;

configs/nixos/modules/zfs.nix

@@ -1,72 +0,0 @@
-{
-  config,
-  lib,
-  ...
-}:
-# The host-level ZFS pool import: durable service state a host mounts, never rebuilds.
-let
-  cfg = config.modules.zfs;
-in
-{
-  options.modules.zfs = {
-    enable = lib.mkEnableOption "importing durable ZFS pools that hold service state";
-
-    hostId = lib.mkOption {
-      type = lib.types.strMatching "[0-9a-f]{8}";
-      example = "deadbeef";
-      description = ''
-        This host's 8-hex-digit ZFS host id, written to `networking.hostId`. ZFS
-        stamps an imported pool with the importing host's id, so a pool still
-        held by another machine is refused rather than silently dual-mounted. It
-        must be fixed for the machine and distinct across machines that can reach
-        the same pool.
-      '';
-    };
-
-    pools = lib.mkOption {
-      type = lib.types.attrsOf (lib.types.attrsOf lib.types.path);
-      default = { };
-      example = lib.literalExpression ''
-        {
-          tank = {
-            media = "/srv/media";
-            downloads = "/srv/downloads";
-          };
-        }
-      '';
-      description = ''
-        The ZFS pools to import at boot, keyed by pool name, each pool mapping a
-        dataset path relative to it to that dataset's mountpoint. A pool is
-        durable state imported as it stands, never created or destroyed by a
-        rebuild, so a service's data survives any rebuild or reimage. A pool
-        with an empty map is still imported, leaving each dataset to its own ZFS
-        `mountpoint` property.
-      '';
-    };
-  };
-
-  config = lib.mkIf cfg.enable {
-    # The ZFS stack in the kernel and boot, needed even where the root filesystem is another kind.
-    boot.supportedFilesystems = [ "zfs" ];
-
-    # ZFS refuses to import a pool without a host id to stamp its ownership onto.
-    networking.hostId = cfg.hostId;
-
-    # The declared pools are imported at boot, distinct from any pool backing the root filesystem.
-    boot.zfs.extraPools = lib.attrNames cfg.pools;
-
-    # Each declared dataset is mounted at its host path as a native ZFS filesystem.
-    fileSystems = lib.mkMerge (
-      lib.mapAttrsToList (
-        pool: mounts:
-        lib.mapAttrs' (
-          dataset: mountpoint:
-          lib.nameValuePair mountpoint {
-            device = "${pool}/${dataset}";
-            fsType = "zfs";
-          }
-        ) mounts
-      ) cfg.pools
-    );
-  };
-}

configs/nixos/registry/address.nix

@@ -1,10 +1,10 @@
-{ lib, ... }:
+{ lib, util, ... }:
 {
   type = lib.types.str;
 
   checks = [
     {
-      assertion = lib.registry.predicates.uniqueValue (entry: entry.value);
+      assertion = util.registry.predicates.uniqueValue (entry: entry.value);
       message = "Address registry values must be unique.";
     }
   ];

configs/nixos/registry/homepage.nix

@@ -0,0 +1,45 @@
+{ lib, ... }:
+{
+  type = lib.types.submodule {
+    options = {
+      tab = lib.mkOption {
+        type = lib.types.str;
+        example = "Apps";
+        description = "Groups the entry in a Homepage tab.";
+      };
+
+      section = lib.mkOption {
+        type = lib.types.str;
+        example = "Media";
+        description = "Groups the entry in a Homepage section.";
+      };
+
+      name = lib.mkOption {
+        type = lib.types.str;
+        example = "Navidrome";
+        description = "Sets the display name in Homepage.";
+      };
+
+      description = lib.mkOption {
+        type = lib.types.nullOr lib.types.str;
+        default = null;
+        example = "Music";
+        description = "Sets the description in Homepage.";
+      };
+
+      icon = lib.mkOption {
+        type = lib.types.nullOr lib.types.str;
+        default = null;
+        example = "navidrome.png";
+        description = "Sets the icon in Homepage.";
+      };
+
+      href = lib.mkOption {
+        type = lib.types.nullOr lib.types.str;
+        default = null;
+        example = "https://music.alexion.dev";
+        description = "Overrides the generated Homepage link.";
+      };
+    };
+  };
+}

configs/nixos/registry/keybind.nix

@@ -0,0 +1,112 @@
+{ lib, util, ... }:
+{
+  checks = [
+    {
+      assertion = util.registry.predicates.uniquePerHost (entry: entry.value.keys);
+      message = "Desktop keybinds must use unique key chords per host.";
+    }
+    {
+      assertion =
+        entries:
+        lib.all (
+          entry:
+          (entry.value.action.kind == "exec" && entry.value.action.command != null)
+          || (
+            builtins.elem entry.value.action.kind [
+              "focus"
+              "move-window"
+            ]
+            && lib.xor (entry.value.action.direction != null) (entry.value.action.workspace != null)
+          )
+          || (
+            entry.value.action.kind == "resize-window"
+            && entry.value.action.direction != null
+            && entry.value.action.workspace == null
+          )
+          || (
+            builtins.elem entry.value.action.kind [
+              "toggle-floating"
+              "toggle-fullscreen"
+              "close-window"
+            ]
+            && entry.value.action.command == null
+            && entry.value.action.direction == null
+            && entry.value.action.workspace == null
+          )
+        ) entries;
+      message = "Desktop keybind actions must set the fields their kind requires.";
+    }
+  ];
+
+  type = lib.types.submodule {
+    options = {
+      keys = lib.mkOption {
+        description = "Sets the key chord for this desktop keybind.";
+        type = lib.types.str;
+        example = "SUPER + Return";
+      };
+
+      repeating = lib.mkOption {
+        description = "Repeats the keybind action while the key chord is held.";
+        type = lib.types.bool;
+        default = false;
+        example = true;
+      };
+
+      locked = lib.mkOption {
+        description = "Allows the keybind action while the session is locked.";
+        type = lib.types.bool;
+        default = false;
+        example = true;
+      };
+
+      action = lib.mkOption {
+        description = "Declares the action this keybind runs.";
+        type = lib.types.submodule {
+          options = {
+            kind = lib.mkOption {
+              description = "Selects the keybind action kind.";
+              type = lib.types.enum [
+                "exec"
+                "focus"
+                "move-window"
+                "resize-window"
+                "toggle-floating"
+                "toggle-fullscreen"
+                "close-window"
+              ];
+            };
+
+            command = lib.mkOption {
+              description = "Command executed by an exec keybind.";
+              type = lib.types.nullOr lib.types.str;
+              default = null;
+              example = "ghostty";
+            };
+
+            direction = lib.mkOption {
+              description = "Direction targeted by a keybind action.";
+              type = lib.types.nullOr (
+                lib.types.enum [
+                  "down"
+                  "left"
+                  "right"
+                  "up"
+                ]
+              );
+              default = null;
+              example = "left";
+            };
+
+            workspace = lib.mkOption {
+              description = "Workspace targeted by a keybind action.";
+              type = lib.types.nullOr lib.types.int;
+              default = null;
+              example = 1;
+            };
+          };
+        };
+      };
+    };
+  };
+}