Ragnor Comerford 3b33e9ac56 tests: pin branch_create_from swap-restore race (red) ... Per AGENTS.md rule 8, this commit lands the failing regression test ahead of the fix so the red → green pair is visible in git log. The test demonstrates that two concurrent `POST /branches` calls with distinct `from` parents corrupt coordinator state: A's "operate" step runs against B's swapped coordinator instead of its own, forking the new branch off the wrong parent's HEAD. Currently fails on f925ad1 with all 8 gamma branches (declared parent: alpha, 5 rows) reporting 4 rows — beta's row count. The operate step ran against beta's coord because B's swap interleaved between A's swap and A's operate. Fix lands in the next commit: hold a single `coordinator.write().await` guard across the entire swap-operate-restore sequence in `branch_create_from_impl` so the three steps are atomic relative to other callers. Closes the bug class "non-atomic three-step coordinator manipulation under &self callers" rather than guarding the specific call site — the right architectural seam (single critical section per swap-restore sequence) eliminates the interleave window for branch_create_from and any future swap-restore caller. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>		2026-05-08 16:44:50 +02:00
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openapi.rs	MR-771: demote Run to direct-publish via expected_table_versions CAS	2026-04-30 08:52:50 +02:00
server.rs	tests: pin branch_create_from swap-restore race (red)	2026-05-08 16:44:50 +02:00