What is ultramod?
ultramod is a Claude Code mod by mertkayacs that the best all-in-one mod pack for Claude Code: a usage limits and context HUD, a guard with undo for rm -rf and git reset --hard, .env and secret protection, and a receipt for every turn. It is listed under Security and has 5 GitHub stars.
| Type | Claude code mod |
|---|---|
| Author | mertkayacs |
| Repository | mertkayacs/ultramod |
| Popularity | 5 GitHub stars |
| Category | Security |
| Security | Review before installing (64/100) |
| Rank | #700 of 5,272 Claude Code mods; #98 in Security |
| License | MIT |
| Last commit | 2026-10-17 |
| Stars this week | +2 |
| Hooks | 11 events |
| Sees | /"^(?:Bash|Read|Edit|MultiEdit|Write|NotebookEdit|Grep|Glob)$"/ calls, classic hooks, every tool call |
| Draws on | AbovePrompt|Pane |
Is ultramod safe to install?
ultramod scores 64/100 on the MCPMods security check: Review before installing. Things to review: starts processes outside the sandbox; writes files or config; 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 files or config | Review |
| Reads environment variables | Review |
| Only sees the events it hooks | Pass |
| Doesn't drive Claude | Pass |
| Passes claude plugin validate | Pass |
| Has an open-source license | Pass |
API calls in its code
| Call | What it means |
|---|---|
$.audio.play | plays audio |
$.clock.after | |
$.clock.every | |
$.clock.now | |
$.command.register | |
$.env.get | reads env vars |
$.fs.exists | reads files |
$.fs.read | reads files |
$.fs.stat | reads files |
$.fs.write | writes files |
$.process.run | runs processes |
$.session.compact | drives Claude |
$.session.cwd | |
$.session.model | |
$.session.root | |
$.session.usage | |
$.session.version | |
$.state.get | |
$.state.set | |
$.store.get | keeps its own state |
$.store.set | keeps its own state |
$.ui.ask | draws interface |
$.ui.log | draws interface |
$.ui.open | draws interface |
$.ui.resolve | draws interface |
$.ui.toast | draws interface |
How do I install ultramod?
- 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/mertkayacs/ultramod claude plugin validate ./ultramod/plugin
- Install it. Run this in your terminal, then /reload-plugins in an open session.
claude plugin marketplace add mertkayacs/ultramod && claude plugin install ultramod@ultramod
Or ask Claude to set it up
Paste this into Claude Code and it installs ultramod for you:
Install the "ultramod" Claude Code mod from https://github.com/mertkayacs/ultramod/tree/main/plugin. Run claude plugin validate on it first and show me what it can access before you enable it.