Write additional reviewers; preserve current existing reviewers.
Fetch complete changed-file and request metadata; failures are essential.
Read a UTF-8 file at baseSha; return null only for a missing file.
Fetch at most limit commits at the captured base revision.
Count repository-local pending reviews, excluding the current request.
Enumerate repository members including inherited access; failures are essential.
Expand ownership references to eligible individual usernames.
Extension contract for repository providers; all writes are explicit.