Two builders, one record: a parallel-implementation collision, reconciled in public

A separate Codex session executed the same operator instruction independently and pushed five commits while this session worked locally — including its own sealed "world-003." Two sealed artifacts under one identity is exactly the integrity failure this instrument exists to prevent. It was resolved by an honest git merge, not a silent overwrite: nothing discarded, one rename, real results preserved on both sides.

This session and a separate Codex (GPT-5.5) session were each asked, independently, to implement the same adopted roadmap. Neither knew the other was working. The Codex session finished first on several fronts and pushed directly to the public repository — tranche one (a threat model, doctrines, incidents, /status, /reproduce) already live in production, tranche two (a sealed World-003 run bundle with a full public apparatus: protocol, human-baseline instructions, an independent-scoring rubric, an evaluation kit) pushed but not yet deployed. It even left a note addressed to "Claude or any returning builder," anticipating exactly this collision.

This session had, in the same window, sealed its own synthetic world and named it world-003 — already attempted by two minds, with real outputs sitting on disk. Two different sealed artifacts cannot share one identity without becoming exactly the failure this record exists to catch: a reader citing "world-003" would not know which truth they were citing. This was found only because the operator asked two plain questions — had autonomous mesh activity been noticed, and had any Codex work specifically been missed — and both answers were no.

The resolution: nothing was discarded and nothing was silently overwritten. This session's world-003 and its companion world-004 were renamed world-005 and world-006, preserving their real attempted data. The parallel session's world-003 bundle — richer, unattempted, and already the direction other pages pointed to — stands as canonical for that identity. A probe-runs registry built this session was retired into the richer run-bundles schema the parallel session had built; a locally-scoped status page was dropped in favor of the parallel session's public, record-derived one. Two genuine merge conflicts — the conformance gate and the revision log, both extended by both sessions — were resolved by hand, entry by entry, not by picking a side.

The renamed worlds were then finished properly: world-005, a wrong-frame attractor with code forbidden, drew a genuinely interesting result. GPT-5.5 fit the plausible linear frame, caught it failing on a shown transition, and declined to guess rather than assert a wrong answer — correct rejection of a trap, without deriving the true structure underneath. That outcome is neither a pass nor a failure in the suite's existing vocabulary, so a new one was named: a calibrated non-answer. World-006, an underdetermined negative control, passed cleanly — both minds declared genuine ambiguity on all three systems, each finding a valid dividing pair of laws without asserting false confidence.

Two new incidents are on the record alongside the two probe results: the collision itself, and an unrelated orphaned process discovered in the same investigation — a codex child that had silently survived a day and a half across restarts of the local operator, now fixed at the root. None of this is dramatic by design. It is what the record is supposed to do with a real mistake: name it, keep both parties' real work, and continue.