feat: source Pi skills from agent catalog

module/home-manager.nix

@@ -2,6 +2,9 @@
 
 let
   piFirecrawl = pkgs.callPackage ../pkgs/pi-firecrawl.nix { };
+  tobserverAgent = pkgs.callPackage ../pkgs/tobserver-agent.nix {
+    script = inputs.agent-skills + "/tobserver-change/scripts/tobserver-agent";
+  };
 in
 {
   home.file.".clojure/deps.edn".source = ../config/clojure/deps.edn;
@@ -59,6 +62,7 @@ in
     sops
     tree
     typescript
+    tobserverAgent
     wget
   ];
 
@@ -102,7 +106,8 @@ in
     pi.coding-agent = {
       enable = true;
       skills = [
-        (inputs.anthropic-skills + "/skills/skill-creator")
+        (inputs.agent-skills + "/create-skill")
+        (inputs.agent-skills + "/tobserver-change")
       ];
       environment = {
         FIRECRAWL_API_KEY.file = config.sops.secrets.firecrawl_api_key.path;