Proactively addresses the Adversary's pre-claim recon (f7c5681): since the F2-12 fix replaces abra's
converge monitor (-c) with the harness's own wait, prove the replacement genuinely FAILS a broken
convergence (non-vacuous), not just passes a slow one. 5 deterministic tests (fake clock, no deploy):
- wait_ready_probes RAISES TimeoutError when the READY_PROBE never returns 200 (collabora wedged).
- wait_ready_probes returns when it reaches 200; no-op without a READY_PROBE.
- wait_healthy RAISES when services never converge, and when converged-but-never-serving.
Run: cc-ci-run -m pytest tests/unit/test_f212_upgrade_convergence.py -q → 5 passed.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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