What is regression-guard?
regression-guard is a Claude Code mod by Plagemes that remembers which tests passed at the start of the session and warns if any of them now fail. It is listed under Security and has 1 GitHub stars.
| Type | Claude code mod |
|---|---|
| Author | Plagemes |
| Repository | Plagemes/claude-mods |
| Popularity | 1 GitHub stars |
| Category | Security |
| Security | Low risk (96/100) |
| Rank | #2,197 of 5,272 Claude Code mods; #259 in Security |
| License | MIT |
| Last commit | 2026-10-15 |
| Hooks | 4 events |
| Sees | Bash calls, Edit|Write calls |
| Draws on | AbovePrompt |
Is regression-guard safe to install?
regression-guard scores 96/100 on the MCPMods security check: Low risk. No checks raised a concern. 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 |
| Doesn't read environment variables | Pass |
| 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.now | |
$.command.register | |
$.fs.read | reads files |
$.mods.hello | |
$.mods.mode | |
$.mods.notify | |
$.mods.publish | |
$.mods.registerTab | |
$.prompt.submit | drives Claude |
$.state.get | |
$.state.set | |
$.ui.log | draws interface |
$.ui.resolve | draws interface |
$.ui.status | draws interface |
$.ui.toast | draws interface |
How do I install regression-guard?
- 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/Plagemes/claude-mods claude plugin validate ./claude-mods/mods/regression-guard
- Install it. Run this in your terminal, then /reload-plugins in an open session.
claude plugin marketplace add Plagemes/claude-mods && claude plugin install regression-guard@claude-mods
Or ask Claude to set it up
Paste this into Claude Code and it installs regression-guard for you:
Install the "regression-guard" Claude Code mod from https://github.com/Plagemes/claude-mods/tree/main/mods/regression-guard. Run claude plugin validate on it first and show me what it can access before you enable it.
More from Plagemes/claude-mods
This repository has at least 9 Claude Code mods on MCPMods.
- a11y-guard: Flags accessibility misses as Claude writes UI: images without alt, unlabeled buttons, clickable divs. (Low risk)
- achievements: Unlock achievements as you work: first commit, 100 green test runs, a week-long streak and more. (Low risk)
- activity-heatmap: A heat map of when you use Claude Code, by hour and weekday. (Low risk)
- agent-presets: Ready-made subagents for focused jobs: debugger, test writer, doc writer and migrator. (Low risk)
- audit-trail: Writes every action Claude takes to an append-only JSONL audit log. (Review before installing)
- auto-checkpoint: Snapshots your work tree before every editing turn and lets you /rollback to any checkpoint. (Low risk)
- auto-format: Formats every file Claude edits with the right formatter for its language. (Low risk)
- autopilot: Give it a goal and success criteria; it plans, delegates, verifies and retries until the criteria pass or it needs you. (High risk)