Update to Software Engineering Toolkit

{
  "description": "Implement specs or tickets in small slices with tests, review, and a clear completion report.",
  "included_files": [],
  "name": "implementation",
  "skill_md_contents": "---\nname: implementation\ndescription: Implement specs or tickets in small slices with tests, review, and a clear completion report.\n---\n\n# Implementation\n\nRead the spec and repository first. Resolve blockers before editing. Implement one coherent slice at a time, drive tests at agreed seams, keep unrelated changes out, run proportionate checks, and finish with a diff review and evidence-based summary.\n"
}