2026 OpenClaw Cron in Production:
openclaw cron syntax, session modes & delivery
For cross-border resident gateways: capture cron expressions, session binding, and delivery semantics in a reproducible runbook; align time zones, upstream quotas, and gateway guardrails—with a high-signal troubleshooting FAQ. Exact subcommands and defaults follow your local openclaw cron --help and the official CLI docs.
1. Goals, scope, and prerequisites
This article tackles three things: when to fire (cron expression and time zone), which session context runs the work (ephemeral / pinned / per-channel isolation), and how failures and retries behave (queue, coalesce, backoff, and dead-letter paths). It assumes your gateway is already running to a runbook (LaunchAgent, systemd, Kubernetes, or similar) and that openclaw gateway status and openclaw health are reliable.
If scheduled jobs will frequently call LLMs or external APIs, align parallel routing, priority fallback, and key pools first—otherwise cron simply turns 429s and 5xx responses into “top-of-the-hour incidents.” Read Learn more: 2026 best OpenClaw deployment practices on macOS cloud nodes. When DNS paths for Git, images, or APIs differ by region, lock the same resolution policy your operators use: Learn more: cross-border DNS (DoH/DoT) enterprise forwarding runbook.
2. openclaw cron: common subcommands and an auditable checklist
These commands help you keep scheduled work inside one configuration and logging surface instead of hiding jobs in system crontab. Flags and names follow your installed CLI; below are the combinations we see most often in production.
Subcommands worth mastering (examples)
# List registered jobs (next fire time, resolved time zone)
openclaw cron list
# Validate that an expression parses (no execution)
openclaw cron validate --schedule "0 */6 * * *"
# Dry-run: print payload / session keys, no external side effects
openclaw cron dry-run --name nightly-digest
# Register: bind session mode and delivery explicitly (see below)
openclaw cron add \
--name nightly-digest \
--schedule "0 2 * * *" \
--timezone UTC \
--session-mode pinned \
--delivery coalesce \
--task "skills:daily-digest"
# Remove / pause (exact verb depends on CLI: pause, disable, etc.)
openclaw cron rm --name nightly-digest
# Recent executions and errors (correlate with gateway logs)
openclaw cron history --name nightly-digest --limit 20
Auditable checklist: for every job record name, schedule+timezone, session-mode, delivery, owner / change ticket, and a clear rollback (delete or pause command).
3. Schedule syntax: five- vs six-field, DST, and UTC anchoring
OpenClaw’s cron parser typically supports the standard five fields (minute hour day month weekday) and may add an optional seconds field in some versions (six fields). For distributed teams, default to UTC as the scheduling anchor and localize only in presentation layers—avoid “local zone + daylight saving” surprises that skip or duplicate triggers.
| Expression | Meaning | Cross-border note |
|---|---|---|
0 2 * * * |
Daily at 02:00 UTC | Good baseline “quiet window” for aligning with US/EU maintenance. |
*/15 * * * * |
Every 15 minutes | Fits queue-style pulls; watch overlap with upstream quota. |
0 9 * * 1-5 |
Weekdays 09:00 (still governed by timezone) |
Readable for a single-country team; for multi-region, prefer UTC plus an explicit business calendar. |
DST tip: if you must use a local zone, document a twice-yearly review of fire times and compare cron next (or equivalent) with real execution logs in monitoring.
4. Session modes: ephemeral, pinned, and per-channel isolation
Scheduled jobs are not stateless HTTP—they reuse tools, threads, and IM-side sessions. Session mode controls whether context survives across ticks.
| Mode | Behavior | Best for |
|---|---|---|
| ephemeral | Fresh session each tick; minimal leftover state. | Reports, health checks, channel-agnostic background work. |
| pinned | Stable session key; ticks share one conversation chain. |
Standing summaries, on-call bots, long-running follow-ups. |
| per-channel / per-thread | Session key includes channel or thread id to prevent cross-talk. | Slack, Telegram, Teams, or other multi-tenant chat surfaces. |
Gotcha: pinned histories that grow without bound slow tool loading and inflate token spend—give the job explicit context trimming or reset on a change window (cron rm then add again).
5. Delivery: queue, coalesce, backoff, and dead letters
delivery defines what happens when a previous run is still in flight—or when upstreams fail.
Common patterns
- queue: enqueue ticks and run serially—use when every invocation must execute.
- coalesce: merge bursts inside a window into one run—great for “fetch incremental” workloads.
- drop: if still running, ignore new ticks—only for loss-tolerant probes.
- backoff + maxAttempts: exponential backoff on 429/5xx/timeouts; after the cap, dead-letter or alert.
Pair coalesce + sane intervals with LLM routing and API key pools—otherwise cron becomes a reliable quota shredder.
6. Ten-step reproducible runbook (cross-border resident gateway)
- Freeze time zone: set
timezone: UTCin config; localize in product UI only. - Dry-run first:
validate+dry-runto confirm session keys and channel ids. - Pick session mode: default ephemeral; move to pinned only when continuity matters.
- Pick delivery: long jobs use coalesce or queue—never unbounded overlap.
- Align network path: egress proxy, DNS, MTU, and ZTNA should match interactive use so cron does not take a “different road.”
- Quota budget: per-job RPS/daily caps tied to LLM routing.
- Observe: correlate
cron historywithgateway logs(shared trace id when available). - Alert: consecutive failures, runtime over SLO, dead-letter backlog.
- Change control: pause schedule edits, verify, then resume.
- Game day: quarterly inject latency + synthetic 429s to validate backoff and dead-letter paths.
7. Troubleshooting FAQ
Q1: The tick never fired
Confirm the process is alive and NTP / clock skew is sane, then check DST boundaries. Use cron list to see whether “next run” advances.
Q2: It fired twice
Typical when multiple gateway instances register the same job or there is no leader election—each host fires independently. Run the job on a single active owner or move scheduling to one external controller (for example HTTP from Kubernetes CronJob) instead of duplicating registration.
Q3: Runs slowed down and tokens spiked
Pinned session history or tool output ballooned; trim context or reset the session, and look for overly frequent schedules.
Q4: Only fails cross-border
Separate network from app errors: compare manual runs vs cron for environment (proxy, NO_PROXY, CA bundles).
Q5: Mix with system crontab?
Not recommended—hard to audit. Prefer openclaw cron for app work; reserve OS cron for machine chores like log rotation.
Resident gateways and cron run quieter on Mac mini
A cross-border resident gateway is fundamentally a 7×24 low-noise clock with clean logs. macOS pairs LaunchAgents, stable system time, and a first-class Unix toolchain with the workflow above. Apple Silicon unified memory keeps gateway processes, logs, and light scheduled load on one machine without thrashing, while idle power often sits in the low single-digit watts—ideal for always-on roles without fan noise or runaway power bills. Gatekeeper, SIP, and FileVault together reduce the risk of unattended nodes being repurposed by malware compared with typical consumer Windows setups.
If you want openclaw cron and the gateway on hardware that is small, silent, and predictable, Mac mini M4 remains one of the best value on-ramps in 2026—get one now so scheduled work and cross-border paths stay reproducible under your runbook.
Run gateway & cron on stable macOS
Cloud Mac mini M4 for resident gateways and scheduled automation—low power, quiet, built for long-lived cross-border links and observability.