refactor(skills): use defaultLocalTargets from agent-skills-nix

- Replace manual localTargets definition with agentLib.defaultLocalTargets
- Override only the structure to use symlink-tree instead of copy-tree
- Update agent-skills-nix to latest version (2026-02-04)
- Skills now install to both .agents/skills and .claude/skills

Author: ryoppippi

CLAUDE.md

@@ -5,7 +5,7 @@ This file provides guidance to Claude Code (claude.ai/code) when working with co
 ## Rules and Skills Structure
 
 - **Rules** (`.claude/rules/`): Automatically loaded based on file paths. Source of truth for project conventions.
-- **Skills** (`.claude/skills/`): Managed by Nix via [agent-skills-nix](https://github.com/Kyure-A/agent-skills-nix). Skills are sourced from [StackOneHQ/skills](https://github.com/StackOneHQ/skills) and installed automatically when entering `nix develop`.
+- **Skills** (`.agents/skills/`, `.claude/skills/`): Managed by Nix via [agent-skills-nix](https://github.com/Kyure-A/agent-skills-nix). Skills are sourced from [StackOneHQ/skills](https://github.com/StackOneHQ/skills) and installed automatically when entering `nix develop`.
 - **Cursor rules** (`.cursor/rules/`): Symlinks to `.claude/rules/` for consistency.
 
 ## Available Skills

flake.lock

@@ -101,20 +101,10 @@
 
           # Agent skills bundle and targets
           bundle = agentLib.mkBundle { inherit pkgs selection; };
-          localTargets = {
-            claude = {
-              dest = ".claude/skills";
-              structure = "symlink-tree";
-              enable = true;
-              systems = [ ];
-            };
-            agents = {
-              dest = ".agents/skills";
-              structure = "symlink-tree";
-              enable = true;
-              systems = [ ];
-            };
-          };
+          # Use symlink-tree instead of copy-tree for skills
+          localTargets = inputs.nixpkgs.lib.mapAttrs (
+            _: t: t // { structure = "symlink-tree"; }
+          ) agentLib.defaultLocalTargets;
         in
         {
           formatter = treefmtEval.config.build.wrapper;