How do I install the Cron skill?

Run npx skillmds@latest add superbereza/cron in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

What does the Cron skill do?

Schedule reminders that come back to you (the agent) It is listed under AI & ML on SkillMD.

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Cron?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

superbereza (@superbereza) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Cron by superbereza — Agent Skill

Name: Cron
Author: superbereza

File contents

Cron - Reminders for Agents

Schedule a reminder that will be delivered back to YOU (the agent), not the user.

How it works

You figure out HOW to receive the reminder (you know your environment)
You pass that as --deliver command
System at (one-time) or crontab (recurring) executes your command
You receive the reminder as input and decide what to do

Usage

# One-time (uses system `at`)
lp-cron add "Check test results" --in "1h" --deliver "YOUR_COMMAND"

# Recurring (uses system crontab)
lp-cron add "Daily standup" --cron "0 10 * * *" --deliver "YOUR_COMMAND"

Your Job: Figure Out Delivery

Provide a command that injects $MSG into YOUR input/context.

If you're in tmux (most common)

# Find your pane
PANE=$(tmux display-message -p '#{session_name}:#{window_index}.#{pane_index}')

# Use this delivery command (sleep 1 is important!)
lp-cron add "Check tests" --in "1h" \
  --deliver "tmux send-keys -t $PANE '\$MSG' && sleep 1 && tmux send-keys -t $PANE Enter"

Important: The sleep 1 before Enter is critical for reliable delivery.

Other environments

Figure out how to inject text into your stdin/context and use that command.

Commands

Command	Description
`lp-cron add TEXT --in TIME --deliver CMD`	One-time reminder
`lp-cron add TEXT --cron EXPR --deliver CMD`	Recurring reminder
`lp-cron list`	Show scheduled jobs
`lp-cron remove ID`	Cancel a job
`lp-cron run ID`	Trigger immediately (test)

Time Formats

--in (one-time):

5m - 5 minutes
1h - 1 hour
2d - 2 days
1h30m - 1 hour 30 minutes

--cron (recurring):

0 9 * * * - every day at 9am
0 10 * * 1 - every Monday at 10am
*/15 * * * * - every 15 minutes

Requirements

at for one-time: sudo apt install at && sudo systemctl enable --now atd
cron for recurring (usually pre-installed)

Example Flow

# You want a reminder in 1 hour
PANE=$(tmux display-message -p '#{session_name}:#{window_index}.#{pane_index}')
lp-cron add "Time to check if tests passed" --in "1h" \
  --deliver "tmux send-keys -t $PANE '\$MSG' && sleep 1 && tmux send-keys -t $PANE Enter"

# ... 1 hour later ...
# You receive: [Reminder] Time to check if tests passed
# Now you decide: check tests, respond to user, or ignore

---name: crondescription: Schedule reminders that come back to you (the agent)---# Cron - Reminders for AgentsSchedule a reminder that will be delivered back to YOU (the agent), not the user.## How it works1. You figure out HOW to receive the reminder (you know your environment)2. You pass that as `--deliver` command3. System `at` (one-time) or `crontab` (recurring) executes your command4. You receive the reminder as input and decide what to do## Usage```bash# One-time (uses system `at`)lp-cron add "Check test results" --in "1h" --deliver "YOUR_COMMAND"# Recurring (uses system crontab)lp-cron add "Daily standup" --cron "0 10 * * *" --deliver "YOUR_COMMAND"```## Your Job: Figure Out DeliveryProvide a command that injects `$MSG` into YOUR input/context.### If you're in tmux (most common)```bash# Find your panePANE=$(tmux display-message -p '#{session_name}:#{window_index}.#{pane_index}')# Use this delivery command (sleep 1 is important!)lp-cron add "Check tests" --in "1h" \ --deliver "tmux send-keys -t $PANE '\$MSG' && sleep 1 && tmux send-keys -t $PANE Enter"```**Important:** The `sleep 1` before Enter is critical for reliable delivery.### Other environmentsFigure out how to inject text into your stdin/context and use that command.## Commands| Command | Description ||---------|-------------|| `lp-cron add TEXT --in TIME --deliver CMD` | One-time reminder || `lp-cron add TEXT --cron EXPR --deliver CMD` | Recurring reminder || `lp-cron list` | Show scheduled jobs || `lp-cron remove ID` | Cancel a job || `lp-cron run ID` | Trigger immediately (test) |## Time Formats**--in (one-time):**- `5m` - 5 minutes- `1h` - 1 hour- `2d` - 2 days- `1h30m` - 1 hour 30 minutes**--cron (recurring):**- `0 9 * * *` - every day at 9am- `0 10 * * 1` - every Monday at 10am- `*/15 * * * *` - every 15 minutes## Requirements- `at` for one-time: `sudo apt install at && sudo systemctl enable --now atd`- `cron` for recurring (usually pre-installed)## Example Flow```bash# You want a reminder in 1 hourPANE=$(tmux display-message -p '#{session_name}:#{window_index}.#{pane_index}')lp-cron add "Time to check if tests passed" --in "1h" \ --deliver "tmux send-keys -t $PANE '\$MSG' && sleep 1 && tmux send-keys -t $PANE Enter"# ... 1 hour later ...# You receive: [Reminder] Time to check if tests passed# Now you decide: check tests, respond to user, or ignore```

Frequently asked questions

Cron