What is assertion-guardian?
assertion-guardian is a Claude Code mod by ccdwyer that blocks edits that weaken tests to fake a green run: removed or loosened assertions, added skips, deleted cases, swallowed errors, snapshot rewrites. It is listed under Security and has no public popularity data yet.
| Type | Claude code mod |
|---|---|
| Author | ccdwyer |
| Repository | ccdwyer/assertion-guardian |
| Popularity | no public popularity data yet |
| Category | Security |
| Security | Low risk (88/100) |
| Rank | #2,843 of 5,272 Claude Code mods; #328 in Security |
| License | MIT |
| Last commit | 2026-10-02 |
| Hooks | 4 events |
| Sees | every tool call |
| Draws on | AbovePrompt |
Is assertion-guardian safe to install?
assertion-guardian scores 88/100 on the MCPMods security check: Low risk. Things to review: starts processes outside the sandbox. 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 processes outside the sandbox | Review |
| Writes no files or config | Pass |
| Doesn't read environment variables | Pass |
| 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 |
|---|---|
$.command.register | |
$.fs.exists | reads files |
$.fs.read | reads files |
$.process.run | runs processes |
$.state.get | |
$.state.set | |
$.ui.resolve | draws interface |
How do I install assertion-guardian?
- 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/ccdwyer/assertion-guardian claude plugin validate ./assertion-guardian/.
- Install it. Run this in your terminal, then /reload-plugins in an open session.
git clone https://github.com/ccdwyer/assertion-guardian && claude --plugin-dir ./assertion-guardian/.
Or ask Claude to set it up
Paste this into Claude Code and it installs assertion-guardian for you:
Install the "assertion-guardian" Claude Code mod from https://github.com/ccdwyer/assertion-guardian. Run claude plugin validate on it first and show me what it can access before you enable it.