M03-L05 exercise — Challenge: recover known-good work

Start: M03-L01–04; supplied history bundle, working toolchain, and preserved practice project.

Submit a recovery packet with: source checkpoint and actual starting commit; failure reproduction; chosen recovery and preserved history; useful README improvement in a clear commit; actual native-test and cross-build results; second-checkout reproduction; and a concise handoff.

Use the prepared FAULT-hysteresis exercise and its exact 27.0 °C clear-boundary case. Identify all data you intend to preserve before modifying state. Keep private remote details secret-free. Complete Q03 and explain one limitation of the software evidence. Account limitations may leave a remote step pending, but never turn it into a claimed success.