Review fixes on the lifecycle-verbs PR. Three of them were escape hatches that
looked implemented and were dead code, and one turned a boot race into a
permanently parked unit.
- ATTACH now requires a LIVE `identify` answer. The claim-time record is
published with NO served set (the runner settles multiplex a moment later),
and `host_gateway()` reports `served_known=False` when nothing answers. An
owner whose served set is unknown yields a TRANSIENT refusal, never an
attach: previously `default`'s claim published "default,other" before its
socket bound, `other`'s systemd unit read that as "I am served", exited 78,
and systemd parked it for good.
- `served_profiles()` honours the actual `gateway.multiplex_profiles` setting
instead of forcing `multiplex=True`, so a standalone gateway stops claiming
the whole roster.
- `--replace` is threaded through the CLI guard into `start_gateway`, and
`--force` into `_host_attach_or_none`. Both previously exited in the guard
before the code that implements them ever ran ("nothing to start", rc=0).
- A supervised attach exits 75 (EX_TEMPFAIL), not 78. 78 is the PERMANENT
config refusal every supervisor parks on; "someone else serves me right now"
is a runtime observation that ends when that process does. No unit files
change: systemd already has RestartForceExitStatus=75/RestartSec=5, the s6
finish script passes 75 through, launchd relaunches a non-78 failure. Exit 0
would not do — s6 parks a clean exit too.
- `restart --all` retracts the stopped owner's record (`discard_dead_record`)
and re-enters with `replace=True`, so it can no longer attach to the corpse
it just stopped and exit 0.
- Rendezvous hardening: the dir is created/repaired 0o700, a record whose
`st_uid` is not ours is ignored, liveness is proven BEFORE we dial the home
it names, and a live `identify` must agree about `hermes_home`.
- `-p X gateway restart --all` reaches the `--all`-aware branch instead of the
generic guard's `hermes -p default gateway restart` one-liner.
- `host_gateway()` is memoized (2s TTL, invalidated on every record write), so
`gateway status`/doctor across N profiles pays one probe, not N.
Tests: the two new files build the record as raw JSON, so they COLLECT and RUN
against a tree without the `home` field and fail on the outcome. A/B against
the PR head: 9 failed / 6 passed → 15 passed. conftest's per-test
HERMES_GATEWAY_LOCK_DIR now defers to a caller-supplied value (and
run_tests.sh forwards it through `env -i`), and the per-process dir is a
deterministic self-sweeping per-PID path instead of an atexit-only mkdtemp.
`test_runner_startup_failures.py` stubs the new attach gate and releases the
host role it claims.
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