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Mark Henderson c8dec7c656 feat(mcp): add gitea_* tools so the AI can write code, not just deploy it

Closes the AI's self-reported gap: "I cannot directly commit or push code".

New MCP capabilities (8) — all scoped to the workspace's Gitea org via
requireGiteaOrg + ensureRepoOwnerInOrg:

- gitea.repos.list           — discover existing repos
- gitea.repo.get             — metadata (default branch, clone URL)
- gitea.repo.create          — mint a new private repo with auto-init
- gitea.file.read            — read a file (or list a directory)
- gitea.file.write           — create/update one file in one commit
- gitea.file.delete          — delete a file (auto-resolves sha)
- gitea.branches.list        — list branches with head sha
- gitea.branch.create        — branch off an existing branch

Wired through:
- lib/gitea.ts: giteaReadFile, giteaListContents, giteaListBranches,
  giteaCreateBranch, giteaListOrgRepos, giteaDeleteFile.
- lib/ai/vibn-tools.ts: 8 new Gemini tool declarations (53 total).
- app/api/chat/route.ts: system prompt now teaches the end-to-end
  scaffold-then-deploy recipe so the AI stops deferring to the user.

MCP capability descriptor bumped to version 2.5.0.

Made-with: Cursor

2026-04-28 11:52:16 -07:00