Simplify beads integration to use bd setup claude

Replace complex marketplace plugin installation with simple 'bd setup claude'
which installs hooks into ~/.claude/settings.json. This is the recommended
approach for Claude Code (CLI + hooks) vs the MCP server approach.

home/roles/development/default.nix

@@ -15,8 +15,6 @@ let
     ref = "main";
   };
 
-  # Beads repository is available via globalInputs.beads from the flake
-  beadsRepo = globalInputs.beads;
 in
 {
   options.home.roles.development = {
@@ -93,49 +91,14 @@ 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
+    # Set up beads Claude Code integration (hooks for SessionStart/PreCompact)
+    # This uses the CLI + hooks approach which is recommended over MCP for Claude Code
+    home.activation.claudeCodeBeadsSetup = lib.hm.dag.entryAfter ["writeBoundary" "claudeCodeCommands"] ''
+      # Run bd setup claude to install hooks into ~/.claude/settings.json
+      # This is idempotent - safe to run multiple times
+      ${globalInputs.beads.packages.${system}.default}/bin/bd setup claude 2>/dev/null || true
 
-      # 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"
+      $DRY_RUN_CMD echo "Claude Code beads integration configured (hooks installed)"
     '';
 
     # Note: modules must be imported at top-level home config