Code-review follow-up on fix/gwc-26-27-alarm-attach.
ApplyReconcile's snapshot-derived feed repairs are at-least-once, not
exactly-once: a reconcile reads the worker's current state while the matching
live transition may still be buffered in the monitor's lease, so both broadcast
and the duplicates are indistinguishable on the alarm feed. This pre-dates the
acked-state delta — the Raise/Clear presence repair has always had it, since
nothing serializes a reconcile pass against the in-flight live stream — so
closing it (serialization or timestamp dedup) stays out of scope for a P2 fix.
Documented instead, with the consumer contract stated explicitly (apply
transitions idempotently, never as an increment or toggle):
- ApplyReconcile gains a "Delivery semantics" comment.
- gateway.md softens the "defense in depth" prose to state the semantics.
- docs/Sessions.md carries the same caveat on the alarm-feed description.
- Tracker change-log records it as a known pre-existing characteristic and a
candidate finding for the next review cycle.
Also hoists the ChannelWorkerClient fake — duplicated across the three alarm
test files — into TestSupport/, dropping the usings it took with it.
An empty replay ring reported oldest_available_sequence = 0 even when gap was
true. Clients follow the documented after_worker_sequence = oldest - 1 formula,
so an unsigned client computed ulong.MaxValue: the follow-up resume replayed
nothing, reported no gap, and the live filter dropped every subsequent event —
a silently dead stream in the headline detach-and-resume scenario, reachable on
default config once ReplayRetentionSeconds (300) age-evicts the ring.
GWC-25: SessionEventDistributor.RegisterWithReplay's empty-ring branch now
reports _highestSequenceSeen + 1 — the next sequence that can possibly be
delivered — when gap is true, so oldest - 1 lands exactly on the highest
observed sequence and the resume delivers everything newer. Still 0 when there
is no gap, where the field is meaningless and never emitted. Nothing is lost:
the evicted interval was unrecoverable either way, and the sentinel's job is to
say "re-snapshot".
CLI-35: the Python CLI fed every stream item into MessageToDict, which raised on
the ReplayGap dataclass and aborted the command after consuming the stream. A
new _event_row helper renders a gap as {"replayGap": {...}} — the same camelCase
shape the Rust CLI emits — and leaves proto events on the existing path.
CLI-36: the Go CLI formatted result.Event on every row, but the library
deliberately clears Event on a gap, so text mode printed
"0 MX_EVENT_FAMILY_UNSPECIFIED" and JSON mode an empty object, discarding the
resume cursors. The loop now branches on result.IsReplayGap() and renders the
typed row in both modes, counting it toward -limit like any other row. The JSON
row's cursors are typed by hand rather than marshalled with protojson: the
proto3 JSON mapping renders 64-bit integers as strings ("7") while the Rust and
Python CLIs emit numbers (7), so going through protojson would have made Go the
only canonical CLI with a different value type.
Docs in the same change: docs/Sessions.md documents the empty-ring sentinel
value and that oldest - 1 is the universal resume formula in both the retained
and fully-evicted cases; docs/CrossLanguageSmokeMatrix.md gains a per-CLI
gap-rendering table covering both client findings, and records exactly what is
and is not comparable across CLIs (same keys and numeric cursors for Rust/Go/
Python; quoted cursors for .NET/Java; differing key order, whitespace, and
container), so a matrix runner compares parsed values rather than raw bytes.
Tests, all written red first and each reproducing its defect verbatim:
- SessionEventDistributorTests: RegisterWithReplayReportsNextDeliverableSequence
WhenRingEmptiedByAge, ...WithRetentionDisabled, and
ResumeUsingSentinelFormulaAfterEmptyRingGapDeliversLiveEvents.
- GatewayEndToEndReconnectReplayTests.ReconnectAfterFullAgeEvictionResumesWith
SentinelFormula — fake-worker e2e resume walk on a fake clock; the fixture now
takes a retention window and a TimeProvider.
- clients/python test_stream_events_renders_replay_gap.
- clients/go TestRunStreamEventsPrintsReplayGap.
GWC-25's ReplayGap.oldest_available_sequence proto-comment amendment is
deliberately deferred to the later codegen wave (see the tracker change log): it
is comment-only but triggers the full five-client regen fan-out.
RunMonitorAsync issued SubscribeAlarms and the first reconcile before the
internal distributor subscriber was attached (via ISessionManager
.ReadAlarmEventsAsync). The pump has been running since MarkReady started the
dashboard mirror and only fans to subscribers registered at fan-out time, so
every transition raised in that two-round-trip window bypassed the alarm feed —
and a missed Acknowledge was never repaired, because ApplyReconcile broadcast
presence deltas only.
- The monitor now takes the internal lease directly from its session BEFORE
SubscribeAlarms and drains it after the first reconcile; window transitions
buffer in the lease's bounded channel. Processing them after ApplyReconcile is
order-safe (ApplyTransition handles alarms the snapshot already placed).
- ISessionManager.ReadAlarmEventsAsync removed — zero remaining callers.
- ApplyReconcile broadcasts an Acknowledge feed transition when a both-present
alarm's state advanced to ActiveAcked. This is a feed-level repair on the
AlarmFeedMessage/StreamAlarms surface rebuilt from the worker's own snapshot,
not MxEvent emission, so the "never synthesize events" rule is untouched;
the reasoning is recorded on ApplyReconcile.
The alarm-monitor test fakes now hand the monitor a real Ready GatewaySession
with a dashboard mirror, which is what makes the window reproducible.
Docs: docs/Sessions.md and gateway.md alarm-monitor ordering notes.
Refs: archreview/2026-07-12/remediation/10-gateway-core.md GWC-26
The GWC-04 remediation decoupled the read loop from event backpressure by
staging events into an unbounded channel, so its TryWrite always succeeded and
the only overflow fault was a single timed WriteAsync exceeding
EventChannelFullModeTimeout. A consumer draining slower than the worker
produces — each individual write still completing inside the window — therefore
grew gateway memory without bound, without a fault, and without a metric: the
queue-depth gauge counted only the bounded consumer channel, so staged events
were invisible.
Bound _eventStaging at 2 x EventChannelCapacity (Wait, single reader/writer, no
synchronous continuations). A rejected staging TryWrite is the sustained
slow-drain signal and faults the client ProtocolViolation with
QueueOverflow("worker-event-staging"), guarded by IsTerminalState() so a
completed channel during shutdown stays a silent drop. SetFaulted is
non-blocking, so the read loop still never awaits behind events. The timed-write
fault is unchanged and still catches the full-stall case earlier.
Move the queue-depth increment from EnqueueWorkerEventAsync to StageWorkerEvent
so the single counter reports total undelivered events (staged + queued); the
decrement at consumer read was already correct. No new configuration key: the
bound is derived, and gateway-side buffering per session is now at most
3 x MxGateway:Events:QueueCapacity. Coordination with still-open GWC-21
(EventChannelFullModeTimeout configurability) remains open and was not blocked
on.
Tests: StagingChannelOverflowFaultsWorkerWithoutWaitingForFullModeTimeout (5-min
full-mode timeout so only the staging bound can fire; asserts an interleaved
command reply still completes) and WorkerEventQueueDepthGaugeCountsStagedEvents.
Docs updated in the same change: GatewayProcessDesign, MxAccessWorkerInstanceDesign,
GatewayConfiguration, Metrics. GWC-24 flipped to Done in both trackers.
Migrate the durable session-resilience governance record (Phase 5
orphan-worker reattach deferred-not-planned, EnableOrphanReattach
does not yet exist, settled Phase-4 Viewer-default decision) from
oldtasks.md into a new "Session-Resilience Epic Scope" entry in
docs/DesignDecisions.md, repoint CLAUDE.md and stillpending.md's
oldtasks.md references to the new home / tasks.json, and git rm
oldtasks.md now that it has no unique content left. Flip TST-29 to
Done in the archreview tracking registers.
The five untracked root docs-review artifacts (MxAccessGateway-docs-*,
MxGatewayClient-docs-*) are absent from this worktree; they must be
deleted from the main working tree separately (gitignored, no repo
impact).
Surfaced during TST-25 acceptance verification: all CI runs on one shared
gitea-runner (maxParallel=1, co-located 10.100.0.35) interleaved with
dohertj2/lmxopcua, and Gitea 1.26 has no run cancel/delete API, so queue
latency is unbounded under cross-repo contention and the runner is a single
point of failure. Design: add a second/labelled runner; document the no-cancel
reality and the run-windev-ci.sh queue-bypass. Low/P2. Roll-ups updated.
Operator bring-up complete and the SSH-driven Windows/x86 CI tier passed
green end-to-end under Gitea Actions run #37: the Linux runner SSHed windev,
checked out the SHA in the isolated C:\build\mxaccessgw-ci clone under lock,
built the x86 Worker and ran Worker.Tests (exit 0); nightly-windev correctly
skipped on the push event. Flip TST-25/TST-26 status rows to Done and record
the bring-up + green-run evidence in the change log.
The `windows`/`live-mxaccess` CI jobs were removed in abb0930 because Gitea
act_runner host-mode on Windows is broken and a runs-on gate with no runner
wedges the queue. This left the entire x86/net48 Worker + Worker.Tests tier
(and the live-MXAccess smoke) unguarded by CI.
Restore it without a native Windows runner: Linux jobs on ubuntu-latest (which
always schedule) SSH to windev (10.100.0.48), fetch+checkout the SHA under test
in an isolated clone C:\build\mxaccessgw-ci, run the x86 build/tests there, and
propagate the remote exit code back — so a Worker regression turns the job red
and an unreachable host fails loud (never stuck).
- scripts/ci/run-windev-ci.sh: Linux driver (key/known-hosts, UTF-16LE base64
EncodedCommand bootstrap, ssh, exit-code passthrough).
- scripts/ci/windev-worker-ci.ps1: windev stage — worktree lock, re-fetch/
checkout under lock, build|test|live modes; PS 5.1-safe, checks $LASTEXITCODE.
- scripts/ci/windev.known_hosts: pinned host keys for StrictHostKeyChecking.
- scripts/ci/README.md: operator bring-up + acceptance checklist.
- ci.yml: windows-x86 (per-push `test`) + nightly-windev (scheduled `live` +
on-failure Gitea issue); drop the removal note; fix header/cron comments.
TST-26 (same commit, by rule): correct docs/scripts that still describe the
removed jobs — GatewayTesting.md, Contracts.md, check-codegen.ps1 — and
reattribute the Generated/-commit guard (primary = check-codegen diff in the
portable job; secondary = windows-x86 net48 compile).
Mechanism hand-verified on windev: build->0, bogus-SHA->nonzero (lock released),
test->356 passed/0 failed in ~50s, ssh exit-code propagation confirmed. Merge
requires operator bring-up first (dedicated ci@ key + Gitea secrets) or the
per-push job is red every push — see scripts/ci/README.md.
Six-domain re-review at the P2 merge (4f5371f): all prior Done claims
verified (none false, 10 partial), 47 new findings (1 High, 14 Medium),
with per-finding design/implementation plans and a new tracking register.
Make the authored CI pipeline execute and go green on the co-located runner (portable + java), fix the five real latent defects the first real run surfaced (codegen-check null, stale rust proto, orphan-terminator Linux path, stale java worker codegen, py3.12 event loop), provision pwsh + Gradle for the self-hosted act image, and disable the Windows jobs (act host-mode broken). TST-03 -> Done.
https://claude.ai/code/session_01DMXXvNuPekkkrTEyPNxEkW
Add docs/plans/2026-07-10-dashboard-session-acl-tst15.md: the fleshed-out
Phase-4 design for the deferred TST-15 finding. Resolves the crux the deferral
left open — the dashboard authenticates LDAP users (Admin/Viewer) while sessions
are API-key-owned (OwnerKeyId), two disjoint identity domains — via a session tag
sourced from the owning API key (carried in the existing ApiKeyConstraints JSON
blob, no SQLite migration). Admin-sees-all; a Viewer may SubscribeSession iff
session.Tags intersects the Viewer's granted tags (new Dashboard:GroupToTag map
-> hub-token tag claims); untagged sessions Admin-only by default. Includes the
enforcement path, task breakdown (epic Tasks 16-19), test plan incl. live-LDAP,
and rejected alternatives.
Design only — TST-15 stays Not started (no implementation). The tracker and the
60-testing-docs-gaps TST-15 section point at the design doc; the change-log also
records the TST-03 finding (zero registered runners; needs a runner co-located on
the gitea Docker network).
Claude-Session: https://claude.ai/code/session_01DMXXvNuPekkkrTEyPNxEkW
Java client toolchain (homebrew openjdk@17) works on the Mac, so the remaining
Java halves of CLI-15/CLI-04 are done locally this session, not batched to windev.
Claude-Session: https://claude.ai/code/session_01DMXXvNuPekkkrTEyPNxEkW
Gateway-side follow-up to the shared auth-lib expiry core (delivered via G-2):
- apikey create-key gains optional --expires — absolute ISO-8601 UTC or relative
<N>d/<N>h from now; omitted means non-expiring (opt-in, unchanged default).
Threaded ApiKeyAdminCommand -> parser -> runner into the library's
CreateKeyAsync(..., expiresUtc, ...). list-keys shows an expiry column and an
active/expired/revoked status.
- Dashboard API Keys page surfaces expiry: an Expires column (Never when unset)
and a status badge reading Expired (red) / Expiring (<=7d, amber) / Revoked /
Active. DashboardApiKeySummary.ExpiresUtc projected in DashboardSnapshotService;
StatusBadge maps the new states.
Tests: parser (absolute/relative/invalid/none) + end-to-end past-expiry rejection
through the live verifier; dashboard summary suite green. Docs: Authentication.md
(verification-flow expiry step, CLI table + examples, dashboard badge).
Closes the tracked SEC-10 polish (SEC-10 core was already Done).
Empirically verified the full ZB.MOM.WW.MxGateway.Tests suite exits cleanly:
- macOS: 0 surviving testhost after a full run.
- windev (origin/main worktree): 0 new testhost and 0 new worker processes
after a full run, isolated by process StartTime.
Static audit confirms the prime-suspect fixtures already dispose deterministically
(WorkerClient cancels _stopCts + awaits its read/write/heartbeat tasks with a 5s
timeout; GatewaySession disposes the client; harness/E2E fixtures use await using).
Drop the stale 'leaves orphaned testhost processes' rationale from CLAUDE.md's
Source Update Workflow; keep filtered-run guidance as a speed guideline only.
Separately discovered (tracked in 00-tracking.md change log, NOT part of TST-08):
Windows-only temp-file-lock flakiness in ~4 full-host test classes (Sqlite
connection-pool retaining a temp .db handle; SelfSignedCertificateProvider's
fixed-name gw.pfx.tmp racing teardown) that macOS never surfaces.
- SEC-02: DashboardAuthorizationHandler restricts the loopback and
Authentication:Mode=Disabled bypasses to read-only. They now satisfy only a
Viewer-bearing requirement (AnyDashboardRole), never AdminOnly, so anonymous
localhost can view the dashboard but cannot reach API-key CRUD or session
Close/Kill at the policy layer (previously guarded only by service re-checks).
- SEC-12: DashboardSessionAdminService emits canonical AuditEvents through
IAuditWriter (actions dashboard-close-session / dashboard-kill-worker, category
SessionAdmin) on Success/Failure/Denied, mirroring the API-key audit path so
destructive session actions leave durable, queryable rows.
- SEC-20: drop the unbounded session_id tag from the exported
mxgateway.heartbeats.failed counter (per-session detail stays in the snapshot/log).
Docs updated same-change: CLAUDE.md (read-only loopback + 5-min bearer),
GatewayDashboardDesign.md (bypass scoping + session-admin audit), Metrics.md.
Server build clean; 30/30 targeted + 295/295 Dashboard/Security/App/Metrics sweep.
Adds the 2026-07-08 architecture review (00-overall + six domain reports)
and a remediation/ tree: one design+implementation doc per domain covering
every finding, plus 00-tracking.md as the master progress tracker.
- 153 findings with stable IDs (GWC/WRK/IPC/SEC/CLI/TST), each with
design rationale, implementation steps, tests, docs, and verification.
- Tracker rolls findings up by severity and P0/P1/P2 roadmap tier, records
cross-cutting clusters and per-finding status (all Not started).
- Planning docs only; no source changes.
Joseph Doherty
dohertj2