Probe 7 (2026-05-08) finally surfaced the actual push error:
! [remote rejected] HEAD -> task-9dc266b5 (shallow update not allowed)
Cause: REFERENCE_BRANCHES handler clones with --depth 1, AR-14a then
fetches upstream-ref --depth 1. The agent's task branch is a single
commit on top of a single shallow commit — no ancestry visible. Gitea
rejects shallow pushes server-side.
Fix:
- Reference clone drops --depth 1 (full history)
- AR-14a fetch upstream-ref drops --depth 1 (full fetch from local-path)
- Cost: a few extra MB per task on tmpfs/PVC. Acceptable.
This unblocks AR-14a's upstream-seeding for the dogfood pipeline. The
agent's branch now has the full upstream history visible to gitea.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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