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Bohan-J f294bfb0eb feat(vcs): gate self-hosted Git providers to self-host deployments only (MUL-3772)
The Forgejo/Gitea/GitLab integration is intended for self-hosted Multica, where
Multica can reach a Git instance on the operator's own network. On the managed
multi-tenant cloud it adds an SSRF surface (connect validates a user-supplied
instance URL from the server) and would store third-party Git tokens for all
tenants under one key, while only serving the small subset of users whose
instance is publicly reachable. Product decision: offer it on self-host only.

- Add an explicit deployment switch MULTICA_VCS_INTEGRATION_ENABLED (default
  off). Connect, rotate, and webhook now require BOTH the switch on AND a valid
  MULTICA_VCS_SECRET_KEY — the switch is the product boundary, not key presence
  alone. When off, connect/rotate return 404 and the webhook returns a bare 404
  (no config leak), independent of the frontend.
- /api/config exposes vcs_integration_available (mirrors the switch, omitted
  when false) so the Settings UI hides the whole "Git providers" section on
  cloud instead of surfacing an operator-only "missing key" hint.
- docker-compose.selfhost.yml defaults the switch on; .env.example documents it.
- Docs (en/zh) lead with a callout: available on self-hosted Multica only, not
  Multica Cloud, and clarify "self-hosted" means Multica itself, not just Git.

#5006 / #5883 stay in place — the schema and backend capability are retained;
this only gates availability. No cloud VCS connection can exist (connect always
required the key, which the cloud never set), so nothing needs migrating.

Verified: go build/vet + VCS/config handler tests on a fresh migrated DB
(incl. a new disabled-deployment 404 test); pnpm typecheck (core + views) and
the integrations-tab + core schema/config vitest suites pass.

Co-authored-by: multica-agent <github@multica.ai>
2026-07-24 16:07:23 +08:00
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