clawdbot/docs/automation/cron-jobs.md

summary, read_when

summary	read_when
Cron jobs + wakeups for the Gateway scheduler	Scheduling background jobs or wakeups Wiring automation that should run with or alongside heartbeats Deciding between heartbeat and cron for scheduled tasks

Cron jobs (Gateway scheduler)

Cron vs Heartbeat? See Cron vs Heartbeat for guidance on when to use each.

Cron is the Gateway’s built-in scheduler. It persists jobs, wakes the agent at the right time, and can optionally deliver output back to a chat.

If you want “run this every morning” or “poke the agent in 20 minutes”, cron is the mechanism.

TL;DR

• Cron runs inside the Gateway (not inside the model).
• Jobs persist under ~/.clawdbot/cron/ so restarts don’t lose schedules.
• Two execution styles:
  • Main session: enqueue a system event, then run on the next heartbeat.
  • Isolated: run a dedicated agent turn in cron:<jobId>, optionally deliver output.
• Wakeups are first-class: a job can request “wake now” vs “next heartbeat”.

Beginner-friendly overview

Think of a cron job as: when to run + what to do.

1. Choose a schedule

   • One-shot reminder → schedule.kind = "at" (CLI: --at)
   • Repeating job → schedule.kind = "every" or schedule.kind = "cron"
   • If your ISO timestamp omits a timezone, it is treated as UTC.

2. Choose where it runs

   • sessionTarget: "main" → run during the next heartbeat with main context.
   • sessionTarget: "isolated" → run a dedicated agent turn in cron:<jobId>.

3. Choose the payload

   • Main session → payload.kind = "systemEvent"
   • Isolated session → payload.kind = "agentTurn"

Optional: deleteAfterRun: true removes successful one-shot jobs from the store.

Concepts

Jobs

A cron job is a stored record with:

• a schedule (when it should run),
• a payload (what it should do),
• optional delivery (where output should be sent).
• optional agent binding (agentId): run the job under a specific agent; if missing or unknown, the gateway falls back to the default agent.

Jobs are identified by a stable jobId (used by CLI/Gateway APIs). In agent tool calls, jobId is canonical; legacy id is accepted for compatibility. Jobs can optionally auto-delete after a successful one-shot run via deleteAfterRun: true.

Schedules

Cron supports three schedule kinds:

• at: one-shot timestamp (ms since epoch). Gateway accepts ISO 8601 and coerces to UTC.
• every: fixed interval (ms).
• cron: 5-field cron expression with optional IANA timezone.

Cron expressions use croner. If a timezone is omitted, the Gateway host’s local timezone is used.

Main vs isolated execution

Main session jobs (system events)

Main jobs enqueue a system event and optionally wake the heartbeat runner. They must use payload.kind = "systemEvent".

• wakeMode: "next-heartbeat" (default): event waits for the next scheduled heartbeat.
• wakeMode: "now": event triggers an immediate heartbeat run.

This is the best fit when you want the normal heartbeat prompt + main-session context. See Heartbeat.

Isolated jobs (dedicated cron sessions)

Isolated jobs run a dedicated agent turn in session cron:<jobId>.

Key behaviors:

• Prompt is prefixed with [cron:<jobId> <job name>] for traceability.
• Each run starts a fresh session id (no prior conversation carry-over).
• A summary is posted to the main session (prefix Cron, configurable).
• wakeMode: "now" triggers an immediate heartbeat after posting the summary.
• If payload.deliver: true, output is delivered to a channel; otherwise it stays internal.

Use isolated jobs for noisy, frequent, or "background chores" that shouldn't spam your main chat history.

Payload shapes (what runs)

Two payload kinds are supported:

• systemEvent: main-session only, routed through the heartbeat prompt.
• agentTurn: isolated-session only, runs a dedicated agent turn.

Common agentTurn fields:

• message: required text prompt.
• model / thinking: optional overrides (see below).
• timeoutSeconds: optional timeout override.
• deliver: true to send output to a channel target.
• channel: last or a specific channel.
• to: channel-specific target (phone/chat/channel id).
• bestEffortDeliver: avoid failing the job if delivery fails.

Isolation options (only for session=isolated):

• postToMainPrefix (CLI: --post-prefix): prefix for the system event in main.
• postToMainMode: summary (default) or full.
• postToMainMaxChars: max chars when postToMainMode=full (default 8000).

Model and thinking overrides

Isolated jobs (agentTurn) can override the model and thinking level:

• model: Provider/model string (e.g., anthropic/claude-sonnet-4-20250514) or alias (e.g., opus)
• thinking: Thinking level (off, minimal, low, medium, high, xhigh; GPT-5.2 + Codex models only)

Note: You can set model on main-session jobs too, but it changes the shared main session model. We recommend model overrides only for isolated jobs to avoid unexpected context shifts.

Resolution priority:

1. Job payload override (highest)
2. Hook-specific defaults (e.g., hooks.gmail.model)
3. Agent config default

Delivery (channel + target)

Isolated jobs can deliver output to a channel. The job payload can specify:

• channel: whatsapp / telegram / discord / slack / mattermost (plugin) / signal / imessage / last
• to: channel-specific recipient target

If channel or to is omitted, cron can fall back to the main session’s “last route” (the last place the agent replied).

Delivery notes:

• If to is set, cron auto-delivers the agent’s final output even if deliver is omitted.
• Use deliver: true when you want last-route delivery without an explicit to.
• Use deliver: false to keep output internal even if a to is present.

Target format reminders:

• Slack/Discord/Mattermost (plugin) targets should use explicit prefixes (e.g. channel:<id>, user:<id>) to avoid ambiguity.
• Telegram topics should use the :topic: form (see below).

Telegram delivery targets (topics / forum threads)

Telegram supports forum topics via message_thread_id. For cron delivery, you can encode the topic/thread into the to field:

• -1001234567890 (chat id only)
• -1001234567890:topic:123 (preferred: explicit topic marker)
• -1001234567890:123 (shorthand: numeric suffix)

Prefixed targets like telegram:... / telegram:group:... are also accepted:

• telegram:group:-1001234567890:topic:123

Storage & history

• Job store: ~/.clawdbot/cron/jobs.json (Gateway-managed JSON).
• Run history: ~/.clawdbot/cron/runs/<jobId>.jsonl (JSONL, auto-pruned).
• Override store path: cron.store in config.

Configuration

{
  cron: {
    enabled: true, // default true
    store: "~/.clawdbot/cron/jobs.json",
    maxConcurrentRuns: 1 // default 1
  }
}

Disable cron entirely:

• cron.enabled: false (config)
• CLAWDBOT_SKIP_CRON=1 (env)

CLI quickstart

One-shot reminder (UTC ISO, auto-delete after success):

clawdbot cron add \
  --name "Send reminder" \
  --at "2026-01-12T18:00:00Z" \
  --session main \
  --system-event "Reminder: submit expense report." \
  --wake now \
  --delete-after-run

One-shot reminder (main session, wake immediately):

clawdbot cron add \
  --name "Calendar check" \
  --at "20m" \
  --session main \
  --system-event "Next heartbeat: check calendar." \
  --wake now

Recurring isolated job (deliver to WhatsApp):

clawdbot cron add \
  --name "Morning status" \
  --cron "0 7 * * *" \
  --tz "America/Los_Angeles" \
  --session isolated \
  --message "Summarize inbox + calendar for today." \
  --deliver \
  --channel whatsapp \
  --to "+15551234567"

Recurring isolated job (deliver to a Telegram topic):

clawdbot cron add \
  --name "Nightly summary (topic)" \
  --cron "0 22 * * *" \
  --tz "America/Los_Angeles" \
  --session isolated \
  --message "Summarize today; send to the nightly topic." \
  --deliver \
  --channel telegram \
  --to "-1001234567890:topic:123"

Isolated job with model and thinking override:

clawdbot cron add \
  --name "Deep analysis" \
  --cron "0 6 * * 1" \
  --tz "America/Los_Angeles" \
  --session isolated \
  --message "Weekly deep analysis of project progress." \
  --model "opus" \
  --thinking high \
  --deliver \
  --channel whatsapp \
  --to "+15551234567"

Agent selection (multi-agent setups):
```bash
# Pin a job to agent "ops" (falls back to default if that agent is missing)
clawdbot cron add --name "Ops sweep" --cron "0 6 * * *" --session isolated --message "Check ops queue" --agent ops

# Switch or clear the agent on an existing job
clawdbot cron edit <jobId> --agent ops
clawdbot cron edit <jobId> --clear-agent

Manual run (debug):
```bash
clawdbot cron run <jobId> --force

Edit an existing job (patch fields):

clawdbot cron edit <jobId> \
  --message "Updated prompt" \
  --model "opus" \
  --thinking low

Run history:

clawdbot cron runs --id <jobId> --limit 50

Immediate system event without creating a job:

clawdbot system event --mode now --text "Next heartbeat: check battery."

Gateway API surface

• cron.list, cron.status, cron.add, cron.update, cron.remove
• cron.run (force or due), cron.runs For immediate system events without a job, use clawdbot system event.

Troubleshooting

“Nothing runs”

• Check cron is enabled: cron.enabled and CLAWDBOT_SKIP_CRON.
• Check the Gateway is running continuously (cron runs inside the Gateway process).
• For cron schedules: confirm timezone (--tz) vs the host timezone.

Telegram delivers to the wrong place

• For forum topics, use -100…:topic:<id> so it’s explicit and unambiguous.
• If you see telegram:... prefixes in logs or stored “last route” targets, that’s normal; cron delivery accepts them and still parses topic IDs correctly.