What is grammar-guard?
grammar-guard is a Claude Code mod by Ev3nt1ne that grammar fixes for prompts you type or dictate: optional auto-fix on send (LanguageTool rules or a light Haiku fix), Haiku drafts that know your project's terms, and word tools (your. It is listed under Security and has no public popularity data yet.
| Type | Claude code mod |
|---|---|
| Author | Ev3nt1ne |
| Repository | Ev3nt1ne/grammar-guard |
| Popularity | no public popularity data yet |
| Category | Security |
| Security | Review before installing (60/100) |
| Rank | #3,170 of 5,272 Claude Code mods; #359 in Security |
| License | MIT |
| Last commit | 2026-10-04 |
| Hooks | 6 events |
| Sees | every prompt |
| Draws on | AbovePrompt |
Is grammar-guard safe to install?
grammar-guard scores 60/100 on the MCPMods security check: Review before installing. Things to review: starts processes outside the sandbox; reads environment variables; watches every prompt or event. It passed 4 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 |
| Reads environment variables | Review |
| Watches every prompt or event | Review |
| 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 | |
$.command.register | |
$.env.get | reads env vars |
$.model.complete | drives Claude |
$.process.run | runs processes |
$.prompt.fill | writes the prompt box |
$.prompt.read | |
$.session.cwd | |
$.session.messages | reads the transcript |
$.state.get | |
$.state.set | |
$.ui.resolve | draws interface |
How do I install grammar-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/Ev3nt1ne/grammar-guard claude plugin validate ./grammar-guard/.
- Install it. Run this in your terminal, then /reload-plugins in an open session.
claude plugin marketplace add Ev3nt1ne/grammar-guard && claude plugin install grammar-guard@grammar-guard
Or ask Claude to set it up
Paste this into Claude Code and it installs grammar-guard for you:
Install the "grammar-guard" Claude Code mod from https://github.com/Ev3nt1ne/grammar-guard. Run claude plugin validate on it first and show me what it can access before you enable it.