How do I install the Anti Sleep skill?

Run npx skillmds@latest add sickn33/anti-sleep 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.

Is Anti Sleep safe to use?

This skill has not completed SkillMD's automated safety review yet. Independent scanners report: SkillSpector: PASS, Skill Scanner: PASS. Capability flags: docs only. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Anti Sleep?

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.

Is Anti Sleep free to use?

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

Who published Anti Sleep?

sickn33 (@sickn33) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Anti Sleep by sickn33 — Agent Skill

Name: Anti Sleep
Rating: 4.5 (4 reviews)
Author: sickn33

File contents

Anti-Sleep (macOS caffeinate)

When to Use

Use when the user wants the Mac to stay awake during a long supervised task.
Use when a build, download, or automation run should not be interrupted by sleep.

Keep the Mac awake using the built-in caffeinate command. No install needed.

Quick start — the standard command

caffeinate -d -i -t 7200    # full power: screen stays on + no idle sleep, for 2 hours

Duration is -t <seconds>: 2h = 7200, 7h = 25200, overnight (9h) = 32400.

Aggressiveness levels

Flags	Effect
`-i`	prevents idle system sleep only (screen may still dim/lock)
`-d`	prevents display sleep (screen stays on)
`-d -i`	default choice — screen on + system awake
`-d -i -s`	adds `-s`: prevents sleep even on AC power semantics; `-s` only works when plugged in
`-u -t 1`	simulates user activity — wakes the display right now

Default to -d -i -t <seconds> unless the user says otherwise.

Tie to a process instead of a timer

caffeinate -d -i -w <PID>          # stays awake until that process exits (great for builds)
caffeinate -i npm run build       # wraps a command; exits when the command finishes

Run it in a visible terminal (cmux pane)

Prefer running it in the user's own terminal pane so it's visible and easy to Ctrl+C. In cmux (read the cmux skill first if interacting with panes):

cmux send --surface surface:<N> "caffeinate -d -i -t 25200\n"

Otherwise run it as a background Bash task. Never block your own foreground shell with it.

Verify and monitor

pgrep -fl caffeinate                       # is it running? shows exact flags
ps -o etime= -p <PID>                      # how long it's been running
pmset -g assertions | grep -i deny        # confirm sleep assertions are active

Gotcha: caffeinate prints nothing and holds the prompt — it looks "stuck" or like Enter wasn't pressed. It isn't stuck. Verify with pgrep, not by looking at the terminal.

Expiry: with -t it exits silently when time runs out — no notification. If the user asks "is it still on?" after hours, check pgrep first; it may simply have expired.

Keyboard backlight

caffeinate cannot keep the keyboard backlight on — it has its own inactivity timer with no CLI/API on Apple Silicon (researched 2026-07). Fix is manual, one-time: System Settings > Keyboard > "Turn keyboard backlight off after inactivity" > Never.

Stop early

pkill -f "caffeinate -d -i"    # or Ctrl+C in the pane running it

After starting: confirm to the user the PID, the flags, and the wall-clock time it will expire.

Limitations

Adapted from davidondrej/skills; verify local paths, tools, credentials, and agent features before acting.
For commands, remote access, scheduling, browser automation, or file-changing workflows, get explicit user approval and confirm the target environment first.

---name: anti-sleepdescription: Keep a Mac awake with caffeinate during long builds, downloads, or supervised automation runs.---# Anti-Sleep (macOS caffeinate)## When to Use- Use when the user wants the Mac to stay awake during a long supervised task.- Use when a build, download, or automation run should not be interrupted by sleep.Keep the Mac awake using the built-in `caffeinate` command. No install needed.## Quick start — the standard command```bashcaffeinate -d -i -t 7200 # full power: screen stays on + no idle sleep, for 2 hours```Duration is `-t <seconds>`: 2h = 7200, 7h = 25200, overnight (9h) = 32400.## Aggressiveness levels| Flags | Effect ||---|---|| `-i` | prevents idle **system** sleep only (screen may still dim/lock) || `-d` | prevents **display** sleep (screen stays on) || `-d -i` | **default choice** — screen on + system awake || `-d -i -s` | adds `-s`: prevents sleep even on AC power semantics; `-s` only works when plugged in || `-u -t 1` | simulates user activity — wakes the display right now |Default to `-d -i -t <seconds>` unless the user says otherwise.## Tie to a process instead of a timer```bashcaffeinate -d -i -w <PID> # stays awake until that process exits (great for builds)caffeinate -i npm run build # wraps a command; exits when the command finishes```## Run it in a visible terminal (cmux pane)Prefer running it in the user's own terminal pane so it's visible and easy to Ctrl+C. In cmux (read the `cmux` skill first if interacting with panes):```bashcmux send --surface surface:<N> "caffeinate -d -i -t 25200\n"```Otherwise run it as a background Bash task. Never block your own foreground shell with it.## Verify and monitor```bashpgrep -fl caffeinate # is it running? shows exact flagsps -o etime= -p <PID> # how long it's been runningpmset -g assertions | grep -i deny # confirm sleep assertions are active```**Gotcha:** `caffeinate` prints nothing and holds the prompt — it looks "stuck" or like Enter wasn't pressed. It isn't stuck. Verify with `pgrep`, not by looking at the terminal.**Expiry:** with `-t` it exits silently when time runs out — no notification. If the user asks "is it still on?" after hours, check `pgrep` first; it may simply have expired.## Keyboard backlight`caffeinate` cannot keep the keyboard backlight on — it has its own inactivity timer with no CLI/API on Apple Silicon (researched 2026-07). Fix is manual, one-time: System Settings > Keyboard > "Turn keyboard backlight off after inactivity" > Never.## Stop early```bashpkill -f "caffeinate -d -i" # or Ctrl+C in the pane running it```After starting: confirm to the user the PID, the flags, and the wall-clock time it will expire.## Limitations- Adapted from `davidondrej/skills`; verify local paths, tools, credentials, and agent features before acting.- For commands, remote access, scheduling, browser automation, or file-changing workflows, get explicit user approval and confirm the target environment first.

Frequently asked questions

Anti Sleep