What is grammar-police?
grammar-police is a Claude Code mod by vutran-tvg that blocks a prompt with a typo or a grammar error until you fix it. It is listed under Interface and has no public popularity data yet.
| Type | Claude code mod |
|---|---|
| Author | vutran-tvg |
| Repository | vutran-tvg/grammar-police |
| Popularity | no public popularity data yet |
| Category | Interface |
| Security | Low risk (84/100) |
| Rank | #5,101 of 5,272 Claude Code mods; #2,089 in Interface |
| License | MIT |
| Last commit | 2026-10-04 |
| Hooks | 4 events |
| Sees | every prompt |
| Draws on | AbovePrompt |
Is grammar-police safe to install?
grammar-police scores 84/100 on the MCPMods security check: Low risk. Things to review: watches every prompt or event. 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 |
| Doesn't read environment variables | Pass |
| 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 | |
$.model.complete | drives Claude |
$.prompt.fill | writes the prompt box |
$.prompt.read | |
$.prompt.submit | drives Claude |
$.session.surfaces | |
$.state.get | |
$.state.set | |
$.store.get | keeps its own state |
$.store.set | keeps its own state |
$.ui.resolve | draws interface |
$.ui.status | draws interface |
$.ui.toast | draws interface |
How do I install grammar-police?
- 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/vutran-tvg/grammar-police claude plugin validate ./grammar-police/.
- Install it. Run this in your terminal, then /reload-plugins in an open session.
claude plugin marketplace add vutran-tvg/grammar-police && claude plugin install grammar-police@vutran-tvg
Or ask Claude to set it up
Paste this into Claude Code and it installs grammar-police for you:
Install the "grammar-police" Claude Code mod from https://github.com/vutran-tvg/grammar-police. Run claude plugin validate on it first and show me what it can access before you enable it.