refactor(flake): move assembly code out of lib

AGENTS.md

@@ -66,7 +66,7 @@ One flake builds every machine I own.
 - 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.
-- `self.lib.registry.collect { hosts = self.nixosConfigurations; }` reads only top-level host `config.registry` declarations.
+- The registry collector reads only top-level host `config.registry` declarations.
   Registry declarations inside guest interiors live under `config.containers.<guest>.config.registry`.
   The collected registry does not include those guest-interior declarations.
   Publish guest values from host-side code, or extend the collector to recurse into guests.

flake.nix

@@ -76,14 +76,11 @@
     { self, nixpkgs, ... }@inputs:
     let
       inherit (nixpkgs) lib;
-      my = import ./lib { inherit lib inputs self; };
+      flake = import ./flake { inherit lib inputs self; };
     in
     {
-      # Helper functions for discovering and building hosts.
-      lib = my;
-
       # Every host under hosts/ is discovered and built.
-      nixosConfigurations = my.mkHosts (self + "/hosts");
+      nixosConfigurations = flake.mkHosts (self + "/hosts");
 
       # A project shell for agent-local resources that should travel with this
       # checkout rather than the operator's global profile.

flake/default.nix

@@ -4,28 +4,19 @@
   self,
 }:
 let
-  inherit (lib)
-    attrNames
-    filterAttrs
-    genAttrs
-    flatten
-    hasSuffix
-    mapAttrsToList
-    ;
-
-  registry = import ./registry.nix { inherit lib self; };
+  registryAssembly = import ./registry.nix { inherit lib self; };
 
   collectNixFiles =
     dir:
-    flatten (
-      mapAttrsToList (
+    lib.flatten (
+      lib.mapAttrsToList (
         name: type:
         let
           path = dir + "/${name}";
         in
         if type == "directory" then
           collectNixFiles path
-        else if type == "regular" && hasSuffix ".nix" name then
+        else if type == "regular" && lib.hasSuffix ".nix" name then
           [ path ]
         else
           [ ]
@@ -35,14 +26,28 @@ let
   moduleFiles = collectNixFiles (self + "/modules");
   guestFiles = collectNixFiles (self + "/guests");
 
+  collectedRegistry = registryAssembly.collect { hosts = self.nixosConfigurations; };
+
   specialArgs = {
-    inherit inputs self;
-    my = self.lib;
-    registry = self.lib.registry.collect { hosts = self.nixosConfigurations; };
+    inherit
+      dotfiles
+      inputs
+      self
+      ;
+    registry = collectedRegistry;
   };
 
   bridgeName = id: "br-vlan${toString id}";
 
+  dotfiles = {
+    inherit (guests) guest;
+
+    lib = {
+      inherit bridgeName;
+      inherit (guests) deriveMac;
+    };
+  };
+
   guests = import ./guests.nix {
     inherit
       inputs
@@ -51,7 +56,7 @@ let
       specialArgs
       bridgeName
       moduleFiles
-      registry
+      registryAssembly
       ;
   };
 
@@ -70,7 +75,7 @@ let
           inputs.disko.nixosModules.disko
           inputs.sops-nix.nixosModules.sops
           inputs.stylix.nixosModules.stylix
-          registry.module
+          registryAssembly.module
           (self + "/hosts/${hostName}")
           {
             networking.hostName = hostName;
@@ -82,19 +87,10 @@ let
   mkHosts =
     hostsDir:
     let
-      hostNames = attrNames (filterAttrs (_name: type: type == "directory") (builtins.readDir hostsDir));
+      hostNames = lib.attrNames (lib.filterAttrs (_name: type: type == "directory") (builtins.readDir hostsDir));
     in
-    genAttrs hostNames (hostName: mkHost { inherit hostName; });
+    lib.genAttrs hostNames (hostName: mkHost { inherit hostName; });
 in
 {
-  inherit
-    collectNixFiles
-    mkHost
-    mkHosts
-    bridgeName
-    registry
-    ;
-
-  inherit (guests) deriveMac guest;
-
+  inherit mkHosts;
 }

flake/guests.nix

@@ -5,7 +5,7 @@
   specialArgs,
   bridgeName,
   moduleFiles,
-  registry,
+  registryAssembly,
 }:
 let
   inherit (lib) escapeShellArg mapAttrsToList;
@@ -136,7 +136,7 @@ let
           enable = lib.mkEnableOption "a reverse-proxy route for this guest";
 
           route = lib.mkOption {
-            type = self.lib.registry.definitions.route.type;
+            type = registryAssembly.definitions.route.type;
             description = "Route registry entry published for this guest.";
           };
         };
@@ -351,7 +351,7 @@ let
             imports =
               moduleFiles
               ++ [
-                registry.module
+                registryAssembly.module
                 inputs.sops-nix.nixosModules.sops
                 inputs.stylix.nixosModules.stylix
                 {

guests/actualbudget.nix

@@ -1,7 +1,7 @@
 {
   config,
   lib,
-  my,
+  dotfiles,
   ...
 }:
 let
@@ -10,7 +10,7 @@ let
 in
 {
   imports = [
-    (my.guest {
+    (dotfiles.guest {
       name = "actualbudget";
       interior = {
         modules.services.actualbudget = {

guests/copyparty.nix

@@ -1,7 +1,7 @@
 {
   config,
   lib,
-  my,
+  dotfiles,
   ...
 }:
 let
@@ -35,7 +35,7 @@ let
 in
 {
   imports = [
-    (my.guest {
+    (dotfiles.guest {
       name = "copyparty";
       interior = {
         modules.services.copyparty = {

guests/nesting-sample.nix

@@ -1,7 +1,7 @@
-args@{ my, ... }:
+args@{ dotfiles, ... }:
 # A sample guest whose interior runs an OCI container on Podman.
 # The image is pulled at runtime, so the guest builds with no build-time fetch.
-my.guest {
+dotfiles.guest {
   name = "nesting-sample";
   interior = {
     virtualisation.oci-containers.containers.hello = {

guests/reverse-proxy.nix

@@ -1,7 +1,7 @@
 {
   config,
   lib,
-  my,
+  dotfiles,
   ...
 }:
 let
@@ -9,7 +9,7 @@ let
 in
 {
   imports = [
-    (my.guest {
+    (dotfiles.guest {
       name = "reverse-proxy";
       interior = {
         modules.services.reverse-proxy.enable = true;

guests/sample.nix

@@ -1,5 +1,5 @@
-args@{ my, ... }:
+args@{ dotfiles, ... }:
 # The tracer-bullet guest: the thinnest complete path from discovery to a
 # running nested container. Its interior is just the guest-base — the baseline
 # toolset and SSH access — so it proves the concept without carrying a service.
-my.guest { name = "sample"; } args
+dotfiles.guest { name = "sample"; } args

modules/default.nix

@@ -1,6 +1,7 @@
 {
   config,
   lib,
+  dotfiles,
   pkgs,
   inputs,
   ...
@@ -63,8 +64,7 @@ in
       useGlobalPkgs = true;
       useUserPackages = true;
       extraSpecialArgs = {
-        inherit inputs;
-        my = inputs.self.lib;
+        inherit dotfiles inputs;
       };
       users.${user.name} = {
         home.username = user.name;

modules/network/vlans.nix

@@ -1,14 +1,14 @@
 {
   config,
   lib,
-  my,
+  dotfiles,
   ...
 }:
 # The host networking foundation: per-VLAN bridges over a tagged trunk.
 let
   cfg = config.modules.network.vlans;
 
-  inherit (my) bridgeName;
+  inherit (dotfiles.lib) bridgeName;
 
   vlanName = id: "${cfg.trunk}.${toString id}";
 in