docs: update MCP config for nixpkgs-options and add nixpkgs-packages

Rename nixos-options to nixpkgs-options and add new nixpkgs-packages
server for package search functionality. Update CLAUDE.md to document
both MCP servers and their available tools.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.mcp.json

@@ -1,10 +1,17 @@
 {
   "mcpServers": {
-    "nixos-options": {
+    "nixpkgs-options": {
       "command": "nix",
-      "args": ["run", "git+https://git.t-juice.club/torjus/labmcp#nixos-options", "--", "serve"],
+      "args": ["run", "git+https://git.t-juice.club/torjus/labmcp#nixpkgs-search", "--", "options", "serve"],
       "env": {
-        "NIXOS_OPTIONS_DATABASE": "sqlite:///run/user/1000/labmcp/nixos-options.db"
+        "NIXPKGS_SEARCH_DATABASE": "sqlite:///run/user/1000/labmcp/nixpkgs-search.db"
+      }
+    },
+    "nixpkgs-packages": {
+      "command": "nix",
+      "args": ["run", "git+https://git.t-juice.club/torjus/labmcp#nixpkgs-search", "--", "packages", "serve"],
+      "env": {
+        "NIXPKGS_SEARCH_DATABASE": "sqlite:///run/user/1000/labmcp/nixpkgs-search.db"
       }
     }
   }

CLAUDE.md

@@ -71,21 +71,30 @@ To copy text to the clipboard, pipe to `wl-copy` (Wayland):
 echo "text" | wl-copy
 ```
 
-### NixOS Options Lookup
+### NixOS Options and Packages Lookup
 
-An MCP server is available for searching and looking up NixOS option documentation. This is useful when configuring new services or options for hosts.
+Two MCP servers are available for searching NixOS options and packages:
 
-**Session Setup:** At the start of each session, index the nixpkgs revision from `flake.lock` to ensure option documentation matches the project's nixpkgs version:
+- **nixpkgs-options** - Search and lookup NixOS configuration option documentation
+- **nixpkgs-packages** - Search and lookup Nix packages from nixpkgs
+
+**Session Setup:** At the start of each session, index the nixpkgs revision from `flake.lock` to ensure documentation matches the project's nixpkgs version:
 
 1. Read `flake.lock` and find the `nixpkgs` node's `rev` field
-2. Call `index_revision` with that git hash
+2. Call `index_revision` with that git hash (both servers share the same index)
 
-**Usage Examples:**
+**Options Tools (nixpkgs-options):**
 
 - `search_options` - Search for options by name or description (e.g., query "nginx" or "postgresql")
 - `get_option` - Get full details for a specific option (e.g., `services.loki.configuration`)
 - `get_file` - Fetch the source file from nixpkgs that declares an option
 
+**Package Tools (nixpkgs-packages):**
+
+- `search_packages` - Search for packages by name or description (e.g., query "nginx" or "python")
+- `get_package` - Get full details for a specific package by attribute path (e.g., `firefox`, `python312Packages.requests`)
+- `get_file` - Fetch the source file from nixpkgs that defines a package
+
 This ensures documentation matches the exact nixpkgs version (currently NixOS 25.11) used by this flake.
 
 ## Architecture