Errors

Most errors look like:

{ "detail": "Repo not found" }

Validation errors may use FastAPI’s array-of-objects detail (loc, msg, type).

Status	Typical cause
401	Missing or unknown access-token; OIDC exchange failed
403	BYO requires Pro; Git quota abuse on paid plans
404	Unknown repo, token, webhook, or bucket
409	Repository name already used
422	Quota, bad name, unverified bucket, IAM/S3 verify failure, webhook URL
429	Auth session or OIDC exchange rate limit
500	Unexpected, including some cold-cache BYO layer misses

Git HTTP uses Basic WWW-Authenticate and may surface a 401/403/500 to git as remote: ... plus a generic fatal line. Check the API error log for BYO, and token grants for 401.