Add Mcp Feature

Adding Features to dart_mcp_server

Follow these instructions when adding new tools, prompts, or other capabilities to the dart_mcp_server.

1. Locate or Create a Mixin

All server features are implemented as mixins on the DartMCPServer at pkgs/dart_mcp_server/lib/src/server.dart.

• Check existing mixins: Look under pkgs/dart_mcp_server/lib/src/mixins/

to see if your feature fits into an existing category (e.g., analyzer.dart, pub.dart).

• Create a new mixin: If your feature is distinct, create a new file in that

directory, following the patterns in existing mixins. Make sure to include a copyright header at the top of the file, with the current year.

2. Implementation Details

• Registration: Tools, prompts, etc should be registered in the initialize

method of the mixin, which is an override and must call super.initialize().

• Parameter Names: When adding new arguments to tools or prompts, always

add a constant to the ParameterNames extension in pkgs/dart_mcp_server/lib/src/utils/names.dart and use that constant instead of hardcoding string literals in your tool parsing and schema.

3. Testing

Always add tests for any new features.

• Test Harness: Use the TestHarness class located in

pkgs/dart_mcp_server/test/test_harness.dart.

• Existing Tests: Look at pkgs/dart_mcp_server/test/tools/ for examples of

how to test specific tools.

• Enhance Harness: If the current TestHarness lacks functionality needed

for your test, feel free to add it.

4. Verification

• Run tests
• Run analysis
• Format the code

5. Documentation

• Run the pkgs/dart_mcp_server/tool/update_readme.dart script to update the

README.md file with any new features, it must be ran from the pkgs/dart_mcp_server directory.

• Apply any other manual edits to the README.md file as needed.
• Update the CHANGELOG.md file to include any user facing updates.

6. Update this skill

• Update this SKILL.md file if that would be helpful for future features.