What is lights-out?
lights-out is a Claude Code mod by ivanvyd that shows the background tasks this session left running and how much memory is free. Stops only what it started. It is listed under Context & memory and has no public popularity data yet.
| Type | Claude code mod |
|---|---|
| Author | ivanvyd |
| Repository | ivanvyd/ground-rules |
| Popularity | no public popularity data yet |
| Category | Context & memory |
| Security | Review before installing (72/100) |
| Rank | #3,485 of 5,272 Claude Code mods; #329 in Context & memory |
| License | MIT |
| Last commit | 2026-10-04 |
| Hooks | 7 events |
| Sees | classic hooks |
| Draws on | AbovePrompt, Pane |
Is lights-out safe to install?
lights-out scores 72/100 on the MCPMods security check: Review before installing. Things to review: starts processes outside the sandbox; reads environment variables. It passed 5 of 8 checks.
Mod footprints come from claude plugin validate, which lists every event a mod hooks and every API call it makes without running it.
| Check | Result |
|---|---|
| No network access | Pass |
| Starts processes outside the sandbox | Review |
| Writes no files or config | Pass |
| Reads environment variables | Review |
| Only sees the events it hooks | Pass |
| Drives Claude (model calls, prompts) | Note |
| Passes claude plugin validate | Pass |
| Has an open-source license | Pass |
API calls in its code
| Call | What it means |
|---|---|
$.clock.after | |
$.clock.every | |
$.clock.now | |
$.command.register | |
$.env.get | reads env vars |
$.process.run | runs processes |
$.session.id | |
$.state.get | |
$.state.set | |
$.store.delete | keeps its own state |
$.store.get | keeps its own state |
$.store.keys | keeps its own state |
$.store.set | keeps its own state |
$.tool.call | drives Claude |
$.ui.ask | draws interface |
$.ui.open | draws interface |
$.ui.resolve | draws interface |
$.ui.toast | draws interface |
How do I install lights-out?
- Check your Claude Code version. Mods need Claude Code 2.1.287 or later and are on by default.
claude --version
- Read its footprint. This lists every event it hooks and every API call it makes, without running it.
git clone https://github.com/ivanvyd/ground-rules claude plugin validate ./ground-rules/plugins/lights-out
- Install it. Run this in your terminal, then /reload-plugins in an open session.
claude plugin marketplace add ivanvyd/ground-rules && claude plugin install lights-out@ground-rules
Or ask Claude to set it up
Paste this into Claude Code and it installs lights-out for you:
Install the "lights-out" Claude Code mod from https://github.com/ivanvyd/ground-rules/tree/main/plugins/lights-out. Run claude plugin validate on it first and show me what it can access before you enable it.
More from ivanvyd/ground-rules
This repository has 5 Claude Code mods on MCPMods.
- save-point: Saves uncommitted work a moment before a command erases it. /save-point brings it back. (Review before installing)
- spotcheck: Checks the files, line numbers and symbols a subagent cites before Claude repeats the report. (Review before installing)
- stay-put: Bounces `cd dir && …` before it runs and gives Claude the one-command form. (Low risk)
- wake-me: Claude ends its turn instead of polling. You watch the progress bar, and the mod wakes Claude when the file is ready. (Low risk)