pluginSkillsFiles not generating home.file entries for first-party plugin skills

[schickling]

Description

When using programs.clawdbot.firstParty.<plugin>.enable = true, the plugins are correctly resolved and included in instances.*.plugins, but the skill files are not being generated in home.file.

Expected Behavior

Skills from first-party plugins should be symlinked/copied to ~/.clawdbot/workspace/skills/<plugin-name>/ via home-manager's home.file mechanism.

Actual Behavior

Only the document files (AGENTS.md, SOUL.md, TOOLS.md) appear in home.file under .clawdbot/workspace/. No skill directories are created.

Investigation

1. Plugins are correctly resolved:

nix eval --json '.#homeConfigurations.<name>.config.programs.clawdbot.instances.default.plugins' | jq 'length'
# Returns: 5 (for summarize, peekaboo, oracle, poltergeist, imsg)

2. Plugin flakes DO have skills defined:

# From tools/summarize/flake.nix
clawdbotPlugin = {
  name = "summarize";
  skills = [ ./skills/summarize ];
  # ...
};

3. Skills resolve to valid nix store paths when tested directly:

nix eval --impure --expr 'let flake = builtins.getFlake "github:clawdbot/nix-steipete-tools/e4e2cac...?dir=tools/summarize"; in flake.clawdbotPlugin.skills'
# Returns: [ /nix/store/...-source/tools/summarize/skills/summarize ]

4. But home.file only shows documents, no skills:

nix eval --json '.#homeConfigurations.<name>.config.home.file' | jq 'keys | map(select(startswith(".clawdbot")))'
# Returns: [".clawdbot/workspace/AGENTS.md", ".clawdbot/workspace/SOUL.md", ".clawdbot/workspace/TOOLS.md"]

Suspected Cause

The pluginSkillsFiles function in nix/modules/home-manager/clawdbot.nix iterates over enabledInstances and calls resolvedPluginsByInstance, but the resulting entries may not be properly merged into home.file.

Relevant code (lines ~420-435):

pluginSkillsFiles =
  let
    entriesForInstance = instName: inst:
      let
        base = "${toRelative (resolvePath inst.workspaceDir)}/skills";
        skillEntriesFor = p:
          map (skillPath: {
            name = "${base}/${p.name}/${builtins.baseNameOf skillPath}";
            value = { source = skillPath; recursive = true; };
          }) p.skills;
        plugins = resolvedPluginsByInstance.${instName} or [];
      in
        lib.flatten (map skillEntriesFor plugins);
  in
    lib.listToAttrs (lib.flatten (lib.mapAttrsToList entriesForInstance enabledInstances));

Environment

• nix-clawdbot rev: f73c4f3
• nix-steipete-tools rev: e4e2cac265de35175015cf1ae836b0b30dddd7b7
• Platform: macOS (aarch64-darwin)
• Nix version: 2.28.x

Workaround

Using programs.clawdbot.skills to manually define skills as a workaround.