feat(pi): expire recent subagent statuses

flake.lock

@@ -562,11 +562,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1785600727,
+        "lastModified": 1785622772,
-        "narHash": "sha256-7Bbj3C+1jyf+YXvUiovCa5t/aCk7BodNf4kV4aZ1Hpw=",
+        "narHash": "sha256-0mOr+Jxerr4SU1ksLoSkztYlZ9P/nMB6RlgWygoCHWc=",
         "ref": "refs/heads/main",
-        "rev": "346413cd7de5e7d03baea09eb935409cfe6eeaa9",
+        "rev": "40b16b87963b085817bfb82c26eef7d0408fa8a5",
-        "revCount": 49,
+        "revCount": 52,
         "type": "git",
         "url": "https://git.alexion.dev/alexion/skills"
       },

modules/agents/skills.nix

@@ -12,7 +12,7 @@ let
   # The skills installed globally, as derivations from the skills flake.
   # grill interviews the operator relentlessly to resolve a plan before building.
   # design-skill drafts and audits Agent Skills for structural predictability.
-  # wayfinder, research, prototype, and slice guide work from exploration through implementation tickets.
+  # wayfinder, research, prototype, slice, and subagents guide work from exploration through implementation tickets and delegation.
   # implement, test-driven-development, and review guide execution and validation once tickets are ready.
   skills = with inputs.skills.packages.${pkgs.stdenv.hostPlatform.system}; [
     grill
@@ -21,6 +21,7 @@ let
     research
     prototype
     slice
+    subagents
     implement
     test-driven-development
     review