What is semantic-grep?
semantic-grep is a Claude Code mod by alex4o that a 'search' tool: ranks every function (or file) under a glob by a System One model (Jev, or the open-source decider) against a plain-language query. It is listed under Interface and has 1 GitHub stars.
| Type | Claude code mod |
|---|---|
| Author | alex4o |
| Repository | alex4o/system-one-mods |
| Popularity | 1 GitHub stars |
| Category | Interface |
| Security | Review before installing (68/100) |
| Rank | #1,468 of 5,272 Claude Code mods; #582 in Interface |
| Last commit | 2026-10-06 |
| Hooks | 2 events |
| Sees | mcp__semantic-grep__search calls |
| Draws on | nothing |
Is semantic-grep safe to install?
semantic-grep scores 68/100 on the MCPMods security check: Review before installing. Things to review: sends data over the network; starts processes outside the sandbox. 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 |
|---|---|
| Sends data over the network | Review |
| 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 |
| Validator reported problems | Note |
| No license detected | Note |
API calls in its code
| Call | What it means |
|---|---|
$.fs.read | reads files |
$.http.fetch | network requests |
$.process.run | runs processes |
$.session.cwd | |
$.tool.register | drives Claude |
$.ui.log | draws interface |
$.ui.status | draws interface |
How do I install semantic-grep?
- 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/alex4o/system-one-mods claude plugin validate ./system-one-mods/semantic-grep
- Install it. Run this in your terminal, then /reload-plugins in an open session.
claude plugin marketplace add alex4o/system-one-mods && claude plugin install semantic-grep@system-one-mods
Or ask Claude to set it up
Paste this into Claude Code and it installs semantic-grep for you:
Install the "semantic-grep" Claude Code mod from https://github.com/alex4o/system-one-mods/tree/main/semantic-grep. Run claude plugin validate on it first and show me what it can access before you enable it.
More from alex4o/system-one-mods
This repository has 2 Claude Code mods on MCPMods.
- read-stub: On a full Read of a big source file, a System One model (Jev, or the open-source decider) decides per function/method/co (High risk)