Add beads Claude plugin installation via home-manager

- Add beadsRepo reference from flake input
- Add activation script to install beads as marketplace plugin
- Updates known_marketplaces.json and config.json declaratively

home/roles/development/default.nix

@@ -5,7 +5,7 @@ with lib;
 let
   cfg = config.home.roles.development;
 
-  # Fetch the claude-plugins repository
+  # Fetch the claude-plugins repository (for humanlayer commands/agents)
   # Update the rev to get newer versions of the commands
   claudePluginsRepo = builtins.fetchGit {
     url = "https://github.com/jeffh/claude-plugins.git";
@@ -14,6 +14,9 @@ let
     rev = "5e3e4d937162185b6d78c62022cbfd1c8ad42c4c";
     ref = "main";
   };
+
+  # Beads repository is available via globalInputs.beads from the flake
+  beadsRepo = globalInputs.beads;
 in
 {
   options.home.roles.development = {
@@ -36,6 +39,7 @@ in
 
   config = mkIf cfg.enable {
     home.packages = [
+      globalInputs.beads.packages.${system}.default
       pkgs.unstable.claude-code
       pkgs.unstable.claude-code-router
       pkgs.unstable.codex
@@ -89,6 +93,51 @@ in
       }"
     '';
 
+    # Install beads Claude plugin as a marketplace
+    home.activation.claudeCodeBeadsPlugin = lib.hm.dag.entryAfter ["writeBoundary" "claudeCodeCommands"] ''
+      # Create plugin directories
+      mkdir -p ~/.claude/plugins/marketplaces
+      mkdir -p ~/.claude/plugins/repos
+
+      # Remove old beads marketplace if it exists (to ensure clean update)
+      rm -rf ~/.claude/plugins/marketplaces/beads-marketplace
+
+      # Copy beads repository to marketplaces directory
+      # Using cp -r because the source is a Nix store path (read-only)
+      cp -r ${beadsRepo} ~/.claude/plugins/marketplaces/beads-marketplace
+      chmod -R u+w ~/.claude/plugins/marketplaces/beads-marketplace
+
+      # Update known_marketplaces.json to include beads-marketplace
+      KNOWN_MARKETPLACES="$HOME/.claude/plugins/known_marketplaces.json"
+      if [ ! -f "$KNOWN_MARKETPLACES" ]; then
+        echo '{}' > "$KNOWN_MARKETPLACES"
+      fi
+
+      # Add beads-marketplace entry using jq (merge with existing)
+      ${pkgs.jq}/bin/jq --arg installPath "$HOME/.claude/plugins/marketplaces/beads-marketplace" \
+        '. + {"beads-marketplace": {
+          "source": {"source": "github", "repo": "steveyegge/beads"},
+          "installLocation": $installPath,
+          "lastUpdated": (now | strftime("%Y-%m-%dT%H:%M:%S.000Z"))
+        }}' "$KNOWN_MARKETPLACES" > "$KNOWN_MARKETPLACES.tmp" && mv "$KNOWN_MARKETPLACES.tmp" "$KNOWN_MARKETPLACES"
+
+      # Update config.json to install the beads plugin
+      CONFIG_JSON="$HOME/.claude/plugins/config.json"
+      if [ ! -f "$CONFIG_JSON" ]; then
+        echo '{"repositories": {}}' > "$CONFIG_JSON"
+      fi
+
+      # Add beads to installed repositories
+      ${pkgs.jq}/bin/jq --arg installPath "$HOME/.claude/plugins/marketplaces/beads-marketplace" \
+        '.repositories["beads-marketplace/beads"] = {
+          "source": {"source": "marketplace", "marketplace": "beads-marketplace", "plugin": "beads"},
+          "installLocation": $installPath,
+          "installedAt": (now | strftime("%Y-%m-%dT%H:%M:%S.000Z"))
+        }' "$CONFIG_JSON" > "$CONFIG_JSON.tmp" && mv "$CONFIG_JSON.tmp" "$CONFIG_JSON"
+
+      $DRY_RUN_CMD echo "Claude Code beads plugin installed successfully"
+    '';
+
     # Note: modules must be imported at top-level home config
   };
 }