Address blocker found in self-review (B1 + I1):
- Manager.RunningSessions previously filtered to runtime.State == RuntimeAlive,
but a session enters Detecting with runtime axis = RuntimeProbeFailed (failed
probe path, decide_bridge.go:72) or RuntimeMissing (detectingLC in
manager_test.go:539). The filter silently parked every Detecting session, so
the recovery path proved by manager_test.go:59 ("healthy probe recovers
liveness-owned detecting -> working") and the terminal path proved by
manager_test.go:79 ("dead+dead with no recent activity concludes killed")
were both unreachable through the reaper. Broaden the predicate to "session
is not in a terminal state" (mirrors the LCM's existing isTerminal helper)
and document the wider semantics.
- reaper.probeOne now reports every probe result — including alive — back to
the LCM as ApplyRuntimeObservation facts. The previous skip-alive
optimization was a layering violation: the reaper has no business deciding
what counts as a no-op. The LCM's ApplyRuntimeObservation already diffs
against canonical and only Upserts on actual change, so steady-state alive
stays cheap. With the broadened poll set, an alive probe for a Detecting
session IS the recovery fact.
- Add unit tests for Manager.RunningSessions covering: nil-lister no-op, lister
error propagation, and the full canonical state matrix (working/idle/
needs_input/detecting-probefailed/detecting-missing/not_started included;
terminated/done excluded).
- Update reaper tests: alive case now asserts the alive fact is reported; new
"detecting session: alive probe reported so LCM can recover from quarantine"
case locks in the recovery path; multi-runtime case now asserts both runtime
facts flow through.
- Bump "session in poll set without handle metadata" log from Debug to Warn —
it is an anomaly (OnSpawnCompleted should have written both keys), not a
routine event.
- Document WithSessionLister must be called before any reaper attached to the
Manager starts running (it is a bare field read; concurrent re-injection is
meaningless anyway).
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