Read-only fleet-size consumer for the 6 mac + 16 linux ezgha runner invariant. Restart-only remediation is UNAVAILABLE (fail-closed) pending jleechanorg/ez-gh-actions PR 67 (dual-Lima convergence) and PR 70/issue 60 (recovery controller) merging AND being proven live-deployed — a 2026-07-09..11 audit found restarts can kill active jobs, create offline-busy 422 registrations, and cannot repair a dead/wrong-namespace backend. Use when the user says "make sure we have N mac and M linux runners", "ezgha fleet short", "supervisor stuck", or after any /runner-health AMBER/RED verdict — but diagnose with ez-gh-actions' doctor-runner first, never treat a shortfall as expected churn.
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name
ezgha-watchdog
description
Read-only fleet-size consumer for the 6 mac + 16 linux ezgha runner invariant. Restart-only remediation is UNAVAILABLE (fail-closed) pending jleechanorg/ez-gh-actions PR 67 (dual-Lima convergence) and PR 70/issue 60 (recovery controller) merging AND being proven live-deployed — a 2026-07-09..11 audit found restarts can kill active jobs, create offline-busy 422 registrations, and cannot repair a dead/wrong-namespace backend. Use when the user says "make sure we have N mac and M linux runners", "ezgha fleet short", "supervisor stuck", or after any /runner-health AMBER/RED verdict — but diagnose with ez-gh-actions' doctor-runner first, never treat a shortfall as expected churn.
["ezgha serve is a long-running supervisor that respawns runner containers as jobs complete (one job per container, then exit). It replaces churned slots but does NOT aggressively top-up to N when below configured count — if a slot stays deregistered for any reason (rate limit, crash, race), serve won't refill it on its own loop. That part of the diagnosis is still true.","What is NO LONGER true: treating a restart as the normal/expected fix, or treating 5/6 mac or 14/16 linux as unremarkable churn. A 2026-07-09..11 audit (bead rev-ft3i8, GH issue #8329) proved restarts can kill ACTIVE jobs mid-run, can create offline-busy 422 runner registrations that neither `ezgha status` nor the GitHub API auto-cleans, and CANNOT repair a dead or wrong-namespace backend (e.g. a Lima VM pointing at the wrong Docker context) — a restart just respawns containers against the same broken backend, looking 'recovered' while masking the real defect.","Runtime recovery logic (graceful drain, backend health verification, safe respawn ordering) belongs in jleechanorg/ez-gh-actions, not your-project.com. This repo's skills/scripts are READ-ONLY CONSUMERS of that repo's health contract (doctor-runner, ezgha status, GitHub runner API) — do not add backend-recovery mutation logic here.","Expected fleet: 6 mac (`ez-mac-runner-b-1..6` on MacBook via `~/.config/ezgha/config.toml` `count=6`) + 16 linux (`ez-runner-b-1..16` on jeff-ubuntu via SSH `~/.config/ezgha/config.toml` `count=16`) = 22 total.","A shortfall (N/M below configured count) is a DIAGNOSTIC PROMPT, not a threshold to dismiss. Run `doctor-runner` (see below) before deciding anything is 'expected'. Never lower `count` or the alert threshold to make a shortfall look normal — that hides the same defect the audit found."]
/ezgha-watchdog — read-only consumer of the 6 mac + 16 linux runner invariant
STATUS (2026-07-13): restart-only remediation is UNAVAILABLE — diagnose-first, fail-closed
Do not treat launchctl kickstart / systemctl --user restart ezgha as a
routine self-heal. The previous version of this skill said restarting the
supervisor was the normal/expected fix and that 5/6 mac or 14/16 linux was
"expected churn — don't alarm." Both statements are now known to be unsafe
defaults per the 2026-07-09 through 2026-07-11 audit (bead rev-ft3i8, GH
issue #8329):
Restarts can kill active jobs mid-run, not just idle slots.
Restarts can create offline-busy 422 runner registrations that neither
ezgha status nor GitHub's runner API cleans up automatically.
A restart cannot repair a dead or wrong-namespace backend (e.g. a Lima
VM pointing at the wrong Docker context) — it just respawns containers
against the same broken backend, which looks recovered while the real
defect stays live.
Gating condition for restart-only mutation to become available again —
BOTH must be independently confirmed merged in git AND proven live-deployed
on the Mac/Linux hosts (a git merge alone is not activation — see "MANDATORY:
post-merge activation check" below):
jleechanorg/ez-gh-actions PR #67 — dual-Lima convergence to a single
canonical Docker backend (bead ez-gh-actions-apye). Verify current
status with:
gh api repos/jleechanorg/ez-gh-actions/pulls/67 --jq '{state,merged,merged_at}'
Status as of 2026-07-13: {"state":"open","merged":false,"merged_at":null}
— NOT merged.
jleechanorg/ez-gh-actions PR #70 — singleton backend-aware recovery
controller for Mac+Linux (bead ez-gh-actions-ghd2.7, tracking issue
ez-gh-actions#60).
Verify current status with:
gh api repos/jleechanorg/ez-gh-actions/pulls/70 --jq '{state,merged,merged_at}'
Status as of 2026-07-13: {"state":"open","merged":false,"merged_at":null}
— NOT merged.
Until both are merged AND their live-deployment is independently proven (see
"Live-deploy proof required" below), any restart of — via this
skill's script, , or — is a
, never an automated first
response or something to silently normalize.
ezgha serve
launchctl kickstart
systemctl --user restart
last-resort, human-approved action only
Restart gate (fixed 2026-07-16, bead rev-5rqci): scripts/ezgha-fleet-watchdog.sh
(the launchd/systemd-installed watchdog, ticking every 120s) now always
detects and logs a below-target shortfall, but only executes the actual
restart command (launchctl kickstart / systemctl --user restart) when
EZGHA_WATCHDOG_ALLOW_RESTART=1 is explicitly set — unset/0 is fail-closed
(alert-only), matching this doc's stated policy. Do not set that env var in
the launchd/systemd unit until PR #67/#70 (or an equivalent live-deployed
recovery path) is confirmed non-destructive. Regression test:
scripts/test_restart_gate.sh.
Diagnose with the real tool: doctor-runner (ez-gh-actions repo)
doctor.sh in ez-gh-actions is LEGACY/BROKEN on Docker 27+ (bead
ez-gh-actions-91r) — on modern Docker it silently misclassifies every
working runner as IDLE. Use doctor-runner instead — the authoritative
script (shipped 2026-07-08; extended 2026-07-09 with the 4-state per-slot
activity-truth model):
# From an ez-gh-actions checkout (clone a scratch copy if you don't have one):
git clone https://github.com/jleechanorg/ez-gh-actions.git /tmp/ez-gh-actions-check
cd /tmp/ez-gh-actions-check
./doctor-runner # health gate: exit 0 = healthy, real per-slot state
./doctor-runner --prove # + dispatches a live canary job and verifies it lands# on the configured runner prefix with conclusion=success# — the strongest available evidence
If working directly inside an ez-gh-actions checkout, use its own slash
command instead: /doctor-ezactions (runs doctor-runner, then /harness
automatically when unhealthy or the queue tail exceeds threshold).
doctor-runner section 9 classifies every configured slot via
docker top <container> | grep Runner.Worker into exactly one of four
states:
State
Meaning
Defect?
EXECUTING
Runner.Worker process present, job running
No
IDLE-OK
listening; nothing queued, or queued < 5 min
No
IDLE-STARVED
listening; queue non-empty ≥ 5 min
Yes
DOWN
no running container
Yes
The GitHub runner API alone cannot be trusted for fleet state. Under
rate limiting it returns truncated/partial data — the same live fleet has
been reported as 7/11/16/19/22 across calls minutes apart. docker top /
docker ps on the host is the source of truth for per-slot state; never
conclude fleet health from API counts in isolation.
Live-deploy proof required before any "recovered" claim
A code fix merging upstream is not the same as it running (see the
"MANDATORY: post-merge activation check" section below and the user-scope
Runtime Activation Claim rule). Before claiming any fleet is "recovered" or
"healthy" after any remediation — restart, manual docker rm -f, service
restart, or a future recovery-controller action once PR #67/#70 ship — show
real command output for BOTH of the following:
Docker identity proof — confirm which Docker backend/context is
actually live and matches the intended one. This is exactly the class of
bug PR #67 fixes (dual-Lima drift to the wrong backend):
docker context show
docker info --format '{{.Name}} {{.ServerVersion}}'
docker ps --filter label=ezgha=managed --format '{{.Names}} {{.Image}} {{.Status}}'
Functional runner/job proof — a real job actually completing on the
fleet, not just a container existing or a registration showing:
docker top <container-name> | grep Runner.Worker # process-level proof it's executing# stronger:
./doctor-runner --prove # dispatches + verifies a live canary job
managed=N container count alone is insufficient — a container can
exist and even show registered while still being IDLE-STARVED or wedged
against a dead/wrong backend. Anything short of both (1) and (2) above is a
tool-layer claim ("container started", "systemctl restart exit 0"), not an
end-state recovery claim.
your-project.com scope: read-only consumer only
This repo (.claude/skills/ezgha-watchdog/) must only:
Read fleet state (ezgha status, docker ps, the GitHub runner API,
/runner-health output) to report AMBER/RED verdicts.
Surface the diagnose-first doctor-runner command to the operator.
Never implement its own backend recovery/drain/respawn-ordering logic.
That responsibility lives in jleechanorg/ez-gh-actions (PR #67, PR #70).
Any future change to this repo that adds new autonomous mutation logic
beyond a human-approved, last-resort restart is out of scope here and
should be redirected upstream to ez-gh-actions instead.
Hysteresis counters — consecutive below-target samples per arch, persisted across invocations since each 120s tick is a fresh process, not a long-lived loop
Each tick is one sample. The script only restarts the supervisor once the
consecutive below-target count exceeds 2 (i.e. on the 3rd consecutive
sample, ~4-6 minutes of continuous shortfall). The counter resets to 0 the
moment a sample is back at/above configured count. Override the state
directory with EZGHA_WATCHDOG_STATE_DIR (used by the test suite for
isolation).
This hysteresis threshold does not make the resulting restart safe — it
only reduces restart frequency, not the risk that a given restart kills an
active job or masks a wrong-backend defect. Treat every fired restart as a
signal to run doctor-runner afterward and confirm live-deploy proof (above)
before considering the shortfall resolved.
MANDATORY: post-merge activation check
A PR merging the watchdog script/templates is NOT the same as the watchdog
running. This is the exact failure this session hit: PR #8193 (the
watchdog fix) merged and passed all CI/codex//advice gates, but the
launchd job was never actually installed on the Mac host —
launchctl list | grep ezgha-watchdog returned nothing for ~19 hours after
merge, silently leaving the Mac fleet under-provisioned (4/6) the whole
time. The code/test layer was verified; the deployment/installation layer
was not (this is this repo's "Runtime Activation Claim" trap applied to an
operational daemon). The same discipline applies upstream: PR #67 and PR
#70 merging in ez-gh-actions is not proof they are running on the actual
Mac/Linux hosts — verify live deployment there too before relying on them.
Whenever a PR touches this skill's scripts/ or install/ files, the
close-out checklist is incomplete until BOTH of these are run and show real
output, not just "PR merged":
# Mac
launchctl list | grep ezgha-watchdog # must show a PID or "-" (loaded), NOT emptytail -5 /tmp/ezgha-watchdog.log # must show a recent timestamp (<5 min old)# jeff-ubuntu (Linux)
ssh jeff-ubuntu 'systemctl --user list-timers ezgha-watchdog*'# must show a NEXT/LAST fire time
ssh jeff-ubuntu 'tail -5 /tmp/ezgha-watchdog.log'
If either check comes back empty, install using the "Install on a new host"
section below — a merged PR is a necessary but not sufficient condition for
this being active.
How to invoke manually
# Both hosts, fix if needed
bash .claude/skills/ezgha-watchdog/scripts/ezgha-fleet-watchdog.sh
# Only one host
bash .../ezgha-fleet-watchdog.sh --host mac
bash .../ezgha-fleet-watchdog.sh --host linux
# Dry-run (report only, do not restart) — PREFER THIS until PR #67/#70 land
bash .../ezgha-fleet-watchdog.sh --dry-run
# View recent watchdog activitytail -n 20 /tmp/ezgha-watchdog.log
Exit codes
Code
Meaning
0
Both hosts at configured count
1
One or more hosts below count (fixed by restart, or dry-run reported it)
2
Cannot read state (ezgha missing, SSH timeout, config unreadable)
Install on a new host
Templates live in this skill's install/ dir:
org.jleechanorg.ezgha-watchdog.plist.template (macOS launchd) and
ezgha-watchdog.service + ezgha-watchdog.timer (Linux systemd --user).
Both use an @INSTALL_DIR@ placeholder for the absolute repo checkout path
(the macOS plist also has @HOME@ / @LOG_DIR@) — substitute with sed
before installing, same convention as
.claude/skills/runner-health/launchd/*.plist.template.
# 1. MacBook: install launchd plist from the templatecd .claude/skills/ezgha-watchdog/install
sed -e "s|@HOME@|$HOME|g" \
-e "s|@INSTALL_DIR@|$(cd ../../../.. && pwd)|g" \
-e "s|@LOG_DIR@|$HOME/Library/Logs|g" \
org.jleechanorg.ezgha-watchdog.plist.template \
> ~/Library/LaunchAgents/org.jleechanorg.ezgha-watchdog.plist
launchctl load ~/Library/LaunchAgents/org.jleechanorg.ezgha-watchdog.plist
# 2. Linux (jeff-ubuntu): install systemd --user timer from the templatescd .claude/skills/ezgha-watchdog/install
mkdir -p ~/.config/systemd/user
sed "s|@INSTALL_DIR@|$(cd ../../../.. && pwd)|g" ezgha-watchdog.service \
> ~/.config/systemd/user/ezgha-watchdog.service
sed "s|@INSTALL_DIR@|$(cd ../../../.. && pwd)|g" ezgha-watchdog.timer \
> ~/.config/systemd/user/ezgha-watchdog.timer
systemctl --user daemon-reload
systemctl --user enable --now ezgha-watchdog.timer
Troubleshooting
Symptom
Cause
Fix
Watchdog keeps restarting serve every 2 min
Supervisor fundamentally broken, or backend is dead/wrong-namespace (restart cannot fix this — see STATUS above)
Run doctor-runner first; check /tmp/ezgha-launchd-stderr.log (Mac) or journalctl --user -u ezgha (Linux); check Docker identity (docker context show) before assuming another restart will help
managed=0 for >5 min
Docker daemon dead OR container image missing
docker info + docker images | grep ezgha-runner
configured=N missing in log
Config file unreadable
cat ~/.config/ezgha/config.toml — should have count = N under [runner]
Linux check returns "cannot read state"
SSH key / alias broken
ssh -o ConnectTimeout=5 jeff-ubuntu 'echo ok'
Anti-patterns
Do NOT treat a restart as routine self-heal, and do NOT treat N/M below
configured count as "expected churn" without first running doctor-runner
— both were the exact false assumptions the 2026-07-09..11 audit disproved.
Do NOT claim a fleet is "recovered" without both Docker-identity proof and
functional runner/job proof (see "Live-deploy proof required" above).
Do NOT run ezgha start --count 1 to fill a single missing slot — the
supervisor's own slot state will conflict. Prefer diagnosis over any
restart while PR #67/#70 remain unmerged.
Do NOT lower count in config to "match reality" — the count is the
target, not the actual. Lowering it removes the alert.
Do NOT add a separate alerting Slack channel — /runner-health AMBER/RED
already names the failing arch with the diagnostic command inline.
Do NOT add backend recovery/drain/respawn logic to this repo — that
belongs in jleechanorg/ez-gh-actions (PR #67, PR #70). your-project.com
stays a read-only consumer of its health contract.
