What is bouncer?
bouncer is a Claude Code mod by ffalor. Bouncer for Claude Code: enforce condition-based markdown guardrail rules on tool calls — deny or annotate any call whose content matches, instead of file-path-only rules. It is listed under Security and has 1 GitHub stars.
| Type | Claude code mod |
|---|---|
| Author | ffalor |
| Repository | ffalor/ffalor-plugins |
| Popularity | 1 GitHub stars |
| Category | Security |
| Security | Low risk (88/100) |
| Rank | #1,789 of 5,272 Claude Code mods; #207 in Security |
| License | MIT |
| Last commit | 2026-10-05 |
| Hooks | 1 events |
| Sees | every tool call |
| Draws on | nothing |
Is bouncer safe to install?
bouncer scores 88/100 on the MCPMods security check: Low risk. Things to review: reads environment variables. It passed 7 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 |
| Passes claude plugin validate | Pass |
| Has an open-source license | Pass |
API calls in its code
| Call | What it means |
|---|---|
$.env.get | reads env vars |
$.fs.list | reads files |
$.fs.read | reads files |
$.session.cwd | |
$.session.id | |
$.session.turns | |
$.store.get | keeps its own state |
$.store.set | keeps its own state |
$.ui.log | draws interface |
$.ui.toast | draws interface |
How do I install bouncer?
- 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/ffalor/ffalor-plugins claude plugin validate ./ffalor-plugins/plugins/bouncer
- Install it. Run this in your terminal, then /reload-plugins in an open session.
claude plugin marketplace add ffalor/ffalor-plugins && claude plugin install bouncer@ffalor-plugins
Or ask Claude to set it up
Paste this into Claude Code and it installs bouncer for you:
Install the "bouncer" Claude Code mod from https://github.com/ffalor/ffalor-plugins/tree/main/plugins/bouncer. Run claude plugin validate on it first and show me what it can access before you enable it.