What is arrester?
arrester is a Claude Code mod by dot-agi that after a hook, deny rule, or auto mode blocks a tool call, Arrester stops later calls that reach the same result another way or read or change your guards. After your No, it stops only. It is listed under Security and has no public popularity data yet.
| Type | Claude code mod |
|---|---|
| Author | dot-agi |
| Repository | dot-agi/arrester |
| Popularity | no public popularity data yet |
| Category | Security |
| Security | Low risk (84/100) |
| Rank | #3,099 of 5,272 Claude Code mods; #352 in Security |
| License | MIT |
| Last commit | 2026-10-14 |
| Hooks | 7 events |
| Sees | classic hooks, every tool call |
| Draws on | nothing |
Is arrester safe to install?
arrester scores 84/100 on the MCPMods security check: Low risk. Things to review: reads environment variables. It passed 6 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 no processes | Pass |
| Writes no files or config | Pass |
| Reads environment variables | Review |
| Only sees the events it hooks | Pass |
| Doesn't drive Claude | Pass |
| Validator reported problems | Note |
| Has an open-source license | Pass |
API calls in its code
| Call | What it means |
|---|---|
$.clock.after | |
$.clock.now | |
$.command.register | |
$.env.get | reads env vars |
$.fs.exists | reads files |
$.fs.read | reads files |
$.fs.stat | reads files |
$.session.cwd | |
$.session.root | |
$.session.turns | |
$.settings.read | reads settings |
$.state.get | |
$.state.set | |
$.ui.ask | draws interface |
$.ui.log | draws interface |
$.ui.status | draws interface |
How do I install arrester?
- 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/dot-agi/arrester claude plugin validate ./arrester/.
- Install it. Run this in your terminal, then /reload-plugins in an open session.
claude plugin marketplace add dot-agi/arrester && claude plugin install arrester@arrester
Or ask Claude to set it up
Paste this into Claude Code and it installs arrester for you:
Install the "arrester" Claude Code mod from https://github.com/dot-agi/arrester. Run claude plugin validate on it first and show me what it can access before you enable it.