feat: pi-agent wrapper

modules/home-manager/coding/agents/claude-code.nix

@@ -36,6 +36,44 @@ in {
       '';
     };
 
+    externalSkills = mkOption {
+      type = types.listOf (types.submodule {
+        options = {
+          src = mkOption {
+            type = types.anything;
+            description = "Flake input pointing to a skills repository root.";
+          };
+          skillsDir = mkOption {
+            type = types.str;
+            default = "skills";
+            description = ''
+              Subdirectory inside src that contains skill folders.
+            '';
+          };
+          selectSkills = mkOption {
+            type = types.nullOr (types.listOf types.str);
+            default = null;
+            description = ''
+              List of skill names to cherry-pick from this source.
+              null means include every skill found in skillsDir.
+            '';
+          };
+        };
+      });
+      default = [];
+      description = ''
+        External skill sources passed to mkOpencodeSkills.
+        Each entry maps directly to an element of the externalSkills
+        list accepted by the AGENTS flake's lib.mkOpencodeSkills.
+      '';
+      example = literalExpression ''
+        [
+          { src = inputs.skills-anthropic; selectSkills = [ "claude-api" ]; }
+          { src = inputs.skills-vercel; }
+        ]
+      '';
+    };
+
     mcpServers = mkOption {
       type = types.attrsOf types.anything;
       default = if mcpCfg != null then mcpCfg.servers else {};
@@ -82,6 +120,21 @@ in {
       source = "${rendered}/.claude/agents";
     };
 
+    # Skills (merged from personal AGENTS repo + optional external skills)
+    home.file.".claude/skills" = mkIf (cfg.agentsInput != null) {
+      source = cfg.agentsInput.lib.mkOpencodeSkills {
+        inherit pkgs;
+        customSkills = "${cfg.agentsInput}/skills";
+        externalSkills =
+          map (
+            entry:
+              {inherit (entry) src skillsDir;}
+              // optionalAttrs (entry.selectSkills != null) {inherit (entry) selectSkills;}
+          )
+          cfg.externalSkills;
+      };
+    };
+
     # Rendered settings.json with permissions + MCP servers
     home.file.".claude/settings.json" = mkIf (settingsJson != null) {
       source = "${settingsJson}";