Update to Matt Pocock Skills

{
  "description": "Use when the user explicitly asks to implement work from an existing specification or set of tickets.",
  "included_files": [
    {
      "relative_path": "SOURCE-METADATA.yaml",
      "size_in_bytes": 40
    },
    {
      "relative_path": "agents/openai.yaml",
      "size_in_bytes": 217
    }
  ],
  "name": "implement",
  "skill_md_contents": "---\nname: implement\ndescription: Use when the user explicitly asks to implement work from an existing specification or set of tickets.\n---\n\nImplement the work described by the user in the spec or tickets.\n\nUse /tdd where possible, at pre-agreed seams.\n\nRun typechecking regularly, single test files regularly, and the full test suite once at the end.\n\nOnce done, use /code-review to review the work.\n\nCommit your work to the current branch.\n"
}