The writer concurrency fake parks on its release signal (the 300 ms delay could release the
gate early on a starved pool), the supervisor test's cross-thread hold flag is Volatile, and
the EffectiveTimeout doc now states the 1 s floor the code and tests implement.
Refs #735
Claude-Session: https://claude.ai/code/session_01Ub9hGmYLQvn9XETzw7CMsT
GalaxyDriver.ShutdownAsync was a no-op: the MX session, both owned gRPC
channels, the EventPump, the alarm feed, the DeployWatcher, the probe
watcher and the reconnect supervisor were released only by DisposeAsync,
which the host never calls — one leaked gateway session per respawn,
removal and /raw browse, and a watchdog Shutdown→Initialize that neither
tore down nor rebuilt anything (review 2026-10-21 G-1, G-2, G-9, G-3).
- ShutdownAsync and DisposeAsync share one ordered TeardownRuntimeAsync
(supervisor first, then deploy/probe watchers, pump, alarm feed,
session, channels); owned seams are nulled so the next InitializeAsync
rebuilds; injected seams survive a shutdown and drop only on the final
dispose. Lifecycle calls are serialised behind a gate.
- A failed production connect releases its partial runtime (no orphaned
client per watchdog retry) and lands Faulted before and after.
- StartDeployWatcherAsync stops the previous watcher before starting a
replacement, and now starts on a production instance's FIRST
InitializeAsync (the old guard returned whenever discovery had not run
here, which on a runtime instance is always).
- ReconnectSupervisor releases each cycle's CancellationTokenSource when
its loop exits and gains an awaitable StopAsync; PerPlatformProbeWatcher
gains an awaitable StopAsync.
- EventPump treats any exception under cancellation as a clean stop, so a
teardown never wakes the supervisor.
- Internal seams for tests: an IGalaxyDeployWatchSource ctor parameter and
a session-open override forwarded to the owned GalaxyMxSession.
Refs #735
Claude-Session: https://claude.ai/code/session_01Ub9hGmYLQvn9XETzw7CMsT
Joseph Doherty