feat(m3-kratos): enable agent-lib shared skills

hosts/m3-kratos/agent-lib.nix

@@ -0,0 +1,21 @@
+{
+  programs.agent-lib = {
+    enable = true;
+    lockFile = ../../agent-sources.lock.json;
+
+    targets.pi.enable = true;
+    targets.opencode.enable = true;
+
+    # profiles.default.sources.mattpocock.skills.all = true;
+    profiles.default = {
+      sources.mattpocock = {
+        skills = {
+          all = true;
+          # Provided by the existing shared skills set; duplicate Home Manager
+          # entries under .agents/skills cannot be installed safely.
+          exclude = ["grill-me" "caveman"];
+        };
+      };
+    };
+  };
+}

hosts/m3-kratos/home.nix

@@ -4,10 +4,16 @@
 # m3ta-home via the profile mapping in hosts/common/users/m3tam3re.nix.
 {
   config,
+  inputs,
   lib,
   ...
 }:
 with lib; {
+  imports = [
+    inputs.agent-lib.homeManagerModules.default
+    ./agent-lib.nix
+  ];
+
   config = mkMerge [
     # ── XDG / MIME defaults ──
     {