The 33 failures on the Linux / Python 3.14 host (#28) were environment
dependencies, not regressions; each test is worth keeping, so fix the
dependency instead of deleting the test:
- test_workspace_scope: `source` under `shell=True` ran in dash; run the
command string under bash.
- conftest autouse: MAM_ENV_FILE points at an absent file for every test,
so a workspace .mam.env with a reachable broker no longer breaks the
"broker unavailable" tests (T1-4).
- help-capture guard: compare normalized help text (whitespace collapsed,
"optional arguments"/"options" unified) so argparse re-wrapping across
Python versions is not drift.
- deploy freshness D-11..D-19 and D-22..D-30: skip with a reason when the
nats-docker submodule is not initialized.
- lib_py.agents.base.conversation_in_use and heartbeat._process_table:
`ps -eo pid=,ppid=,args=` (POSIX) instead of the BSD `-axo ... command=`
form, the most likely cause of the 12 purge failures on Linux (the holder
scan returned nothing); to be confirmed on that host.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VCgu9Fa9iT7TbJUSzdq4Ff
Review round 5 (planner-reviewer-codex-01, NOT PASS at 2b1d590):
- F1 bounded lock cycle: the stopper holds the per-job lifecycle lock while
it waits for the timer to exit, and the timer's exit cleanup waited for
that same lock, so every stop ran out the drain and ended in SIGKILL with
a false "did not drain" warning. The exiting timer now tries the lock
without blocking (lifecycle_lock(blocking=False)); when it is busy the
ownership operation holding it removes the pidfile, and when it is free
the own-pid comparison is kept.
- F2 untracked owner: when writing the new timer's pid fails after the
spawn, _spawn_timer_locked kills and reaps that exact process while the
lock is still held and drops only a partial pidfile of that attempt,
then re-raises.
- tests: an idle timer stops well before a 10 s drain without SIGKILL;
a pidfile failure after spawn leaves no survivor, no pidfile and a free
lock (both fail on 2b1d590); a spawn failure leaves nothing behind and
the next start works.
- docs: MESSAGING 2.5 and VERSIONS item 1 describe the lifecycle lock;
VERSIONS test count 31.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HCGpJXhSZasJLU38ksDghe
Review round 4 (codex R3): two concurrent `start_timer` calls for the same
attempt both passed the "no timer" check, both spawned, and the pidfile
tracked only one - the untracked timer could still publish a retained
`running` after `completed`. A per-job flock (`<job>.heartbeat.lock`,
separate from the registry/seq lock so in-flight beats can still take
their seq) now makes observe/drain/spawn/publish-pid one ownership
operation; the terminal stop takes the same lock; a start that finds the
attempt ended (terminal record or raised barrier) does not arm; the timer
removes its own pidfile only under the lock so a replacement's pid is never
deleted. Regressions: concurrent starts leave exactly one tracked owner that
the terminal stop drains; a start after the barrier arms nothing.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VCgu9Fa9iT7TbJUSzdq4Ff
Review round 3 (planner-reviewer-codex-01, NOT PASS R3 at 7e1d3f0):
start_timer stopped a running timer with a bare TERM and overwrote the only
pidfile. A beat the old timer had already admitted - seq taken, recorded on
disk, held at the wire - stayed alive but undiscoverable, so a later
terminal publish drained only the replacement and the old beat could still
put a retained `running` on the broker after `completed`.
- heartbeat.start_timer: stop_timer(drain=MAM_HEARTBEAT_DRAIN_S). The old
timer is drained or killed, and confirmed gone, before the pidfile names
the new one. A terminal publish racing the replacement either drains the
same old pid or meets a new timer whose beats the barrier refuses.
- test: an old timer held at the wire after admission is replaced, then
the job completes; the old timer is gone before the handover and nothing
it held follows the terminal (fails on 7e1d3f0).
- docs: MESSAGING 4.3 no longer says any state resets the idle clock;
MESSAGING 2.5 and VERSIONS state the replacement rule; test count 26.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HCGpJXhSZasJLU38ksDghe
Review round 2 (planner-reviewer-codex-01, NOT PASS at d09c162):
- R1 remote.mirror_job: admission under the registry lock. The same
dispatch_token is idempotent (a finished attempt never runs again), a
lower attempt or the same attempt under another token is refused before
any write, and only a strictly newer attempt replaces the record
(register_job(supersede_older_attempt=True); events.log kept, seqs stay
monotonic).
- R2 remote.handle_dispatch: the --exec command runs in its own session;
at timeout_sec, or when the runner is interrupted (SIGTERM now unwinds
it), the whole process group is terminated (TERM, then KILL) before the
error is published.
- R3 terminal barrier: a terminal publish raises an attempt-scoped barrier
under the lock that allocates seqs, stops the heartbeat timer, gives it
MAM_HEARTBEAT_DRAIN_S (default 1 s) to exit and then kills it, and only
then takes its own seq. Beats are admitted under that lock
(next_seq(admit=...)); a beat still on the wire is cancelled with the
timer rather than holding the terminal back; and a late non-terminal
event never publishes a running state over a terminal record.
- R4 job_subscriber: a retained state renews the idle clock only when its
seq is newer than everything already accepted; re-delivered or older
snapshots still recover a terminal status.
- tests: five regressions, all failing on 77f2829; T1-14's wall clock
15 -> 30 s against public-broker latency.
- docs: MESSAGING 2.5 (barrier, state renewal, detection vs final close),
heartbeat docstring, loop SKILL.md (remote rows need the Python runner),
VERSIONS v4.5.0 items 1/4/5 and the test count (25).
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HCGpJXhSZasJLU38ksDghe
Review round 1 (claude NOT PASS) corrections:
- B2: the timer now watches a process - `--watch-pid`, or by default the
nearest agent-CLI ancestor of the publishing command - and stops within
one period once it is gone, so a crashed agent stops heartbeating and is
closed after K x N; a remote runner watches itself. Documented as process
liveness (an alive-but-stuck agent keeps heartbeating).
- R1: `_wait_started` accepts an events.log `started` only when it carries
the current dispatch token (loop jobs share one events.log).
- R2: the remote runner ignores a re-sent dispatch of an attempt that
already reached its terminal.
- R3: registry.md EOF blank line (git diff --check clean).
- R4: the ack error states the effective budget when the wall clock cut it.
- P3: stop_timer verifies the pidfile pid is this job's timer before
signalling; a retained state message keeps its own seq watermark so it
can never make the monotonic guard drop its own event.
- MULTI_AGENT_RULES.md timeout section updated for the contract.
- tests: agent-process death stops the timer, recycled-pid safety,
attempt-scoped started, re-sent dispatch; acceptance 3 now kills the
agent process instead of the timer. Help captures refreshed
(--watch-pid). The wrapper can be sourced with
MAM_DELEGATE_JOB_NO_MAIN=1 for helper-level tests.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VCgu9Fa9iT7TbJUSzdq4Ff
Contract (no new event types): heartbeat every N s (automatic timer),
unresponsive after K x N s without an event, `started` within T s of the
injection, retained per-job state, and a remote transport.
- registry: heartbeat_sec / heartbeat_misses / ack_timeout_sec / transport
fields; idle_timeout_sec derives K x N unless explicit (defaults 30/4/60
keep the historical 120 s idle window).
- heartbeat.py + publish_event --heartbeat N: detached fixed-cadence timer
publishing signed `progress` heartbeats (threaded wire publish, local
record first); stopped by the terminal event via pidfile, by re-dispatch
and by lifetime. Terminal events refuse --heartbeat.
- publish_event: retained `<prefix>/state` (status, last_event, seq, HMAC)
sent on the same connection after every event (--no-state to skip);
publisher.publish_raw takes extra messages.
- job_subscriber: subscribes the state topic, recovers terminal status from
retained state, resets idle on any accepted message, records seq_gap and
reconnected in the audit log, idle budget before the first event is
T + K x N (--ack-timeout), --remote mirrors started/terminal events into
the registry through the transition boundary.
- lib.sh send_keys_safe: an accepted-but-unconfirmed submission is confirmed
by agent_status working or the job's own `started` (_sks_job_started);
pane change and busy token are no longer delivery signals.
- wrapper: --heartbeat/--heartbeat-misses/--ack-timeout (MAM_* env),
injected start command arms the timer, brief states the contract,
_wait_started (registry / events.log / subscriber log, bounded by T and
the wall clock) replaces the 10 s inject grace, R1 grace uses only the
on-disk event age (herdr/pane logged once as a diagnostic),
remote:<name> sessions skip preflight/idle/pane and dispatch over the
broker (remote_dispatch).
- remote.py (+ scripts shim): signed retained dispatch (MAM_DISPATCH_SECRET)
and a runner that mirrors the job into its own registry with the
orchestrator's identity, publishes started --heartbeat, runs --exec and
publishes the terminal event.
- loop runner: passes MAM_HEARTBEAT_SEC / MAM_HEARTBEAT_MISSES /
MAM_ACK_TIMEOUT_S through; YAML rows with transport: remote delegate as
remote:<name>.
- docs: MESSAGING.md 2.5 contract + remote transport, delegate-job SKILL.md,
registry.md, loop SKILL.md.
- tests: tests/test_issue18_liveness_contract.py (16); issue 14 pane-signal
tests flipped to started-based; issue 6 working-agent tests acknowledge
with started; CLI snapshot/help captures refreshed.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VCgu9Fa9iT7TbJUSzdq4Ff
GodopuandClaude Fable 5.1