Kick off the C2 Mikado chain for an opt-in (default-off) hephd
self-update mode (forge-poll -> cargo install from tag -> self-restart).
Goal card plus eight prerequisite cards, indexed from how-to.md:
release-poll-version-check, self-update-opt-in-flag (leaves)
-> self-update-poll-loop (notify-only core)
service-env-forge-access (leaf, the cargo/forge blocker)
+ self-update-poll-loop -> cargo-install-from-tag
service-respawn-on-clean-exit (leaf, systemd Restart=always)
+ cargo-install-from-tag -> self-restart-after-update
verify-hub-dropout-resilience (leaf, lock in the base-case guarantee)
Grounded in research of hephd's sync loop, daemon lifecycle, the
launchd/systemd service templates, and the forge releases API.
Captured from Hephaestus task 01KTA2NSNRYT902HC3VRW00S1J.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
