mgrep-code-search

mgrep-code-search is a skill for Claude Code, Codex from tmcfarlane/oh-my-cursor. It costs 69 tokens per session (828 once invoked), scanned A, a copy of mgrep-code-search, MIT.

A semantic search tool for exploring codebases with natural-language questions instead of exact words. It can search code, text, PDFs, and images, and is intended for larger or unfamiliar repositories.

In plain words
What is it for?
Use it to locate where a feature is implemented, find authentication settings, and understand how parts of an unfamiliar codebase work.
Why use it?
It helps when you know what you want to find but not the exact function name or wording. This reduces the time spent browsing nested folders and guessing search terms.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/tmcfarlane/oh-my-cursor/mgrep-code-search
Any agent
npx skills add tmcfarlane/oh-my-cursor --skill mgrep-code-search
Clone the repo
git clone --depth 1 https://github.com/tmcfarlane/oh-my-cursor

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for mgrep-code-search

README.md
[![agentmods](https://agentmods.dev/badge/skills/tmcfarlane/oh-my-cursor/mgrep-code-search.svg)](https://agentmods.dev/skills/tmcfarlane/oh-my-cursor/mgrep-code-search)
Your own site
<a href="https://agentmods.dev/skills/tmcfarlane/oh-my-cursor/mgrep-code-search"><img src="https://agentmods.dev/badge/skills/tmcfarlane/oh-my-cursor/mgrep-code-search.svg" alt="Measured on agentmods" height="20"></a>
Per session 69 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 828 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 100% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00069 $0.00828
Opus 5 $0.00034 $0.00414
Sonnet 5 $0.00014 $0.00166
Haiku 4.5 $0.00007 $0.00083

Measured 4d ago against content hash 19722d601022, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

mgrep-code-search scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

100% identical to mgrep-code-search — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

skills/mgrep-code-search/SKILL.md · 114 lines

How it starts

The opening of the file, as written. The whole thing — 114 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Overview

mgrep is a semantic search tool that enables natural language queries across code, text, PDFs, and images. It is particularly effective for exploring larger or complex codebases where traditional pattern matching falls short.

When to Use This Skill

Use mgrep when:

  • The codebase contains more than 30 non-gitignored files
  • There are nested directory structures
  • Searching for concepts, features, or intent rather than exact strings
  • Exploring an unfamiliar codebase
  • Need to understand "where" or "how" something is implemented

Use traditional grep/ripgrep when:

  • Searching for exact patterns or symbols
  • Regex-based refactoring
  • Tracing specific function or variable names

Quick Start

Indexing

Before searching, start the watcher to index the repository:

bunx @mixedbread/mgrep watch

The watch command indexes the repository and maintains synchronisation with file changes. It respects .gitignore and .mgrepignore patterns.

Searching

bunx @mixedbread/mgrep "your natural language query" [path]

Search Commands

Basic Search

bunx @mixedbread/mgrep "where is authentication configured?"
bunx @mixedbread/mgrep "how do we handle errors in API calls?" src/
bunx @mixedbread/mgrep "database connection setup" src/lib

Search Options

Option Description
-m <count> Maximum results (default: 10)
-c, --content Display full result content
-a, --answer Generate AI-powered synthesis of results
-s, --sync Update index before searching
--no-rerank Disable relevance optimisation

Examples with Options

# Get more results
bunx @mixedbread/mgrep -m 25 "user authentication flow"

# Show full content of matches
bunx @mixedbread/mgrep -c "error handling patterns"

# Get an AI-synthesised answer
bunx @mixedbread/mgrep -a "how does the caching layer work?"

# Sync index before searching
bunx @mixedbread/mgrep -s "payment processing" src/services

Read the full file on GitHub · 114 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 4d ago First seen · 114 lines · 69 tokens per session scan A 19722d601022

Subscribe to this mod's changes

mgrep-code-search is a skill published in the GitHub repository tmcfarlane/oh-my-cursor (108 stars, last pushed 2mo ago), licensed MIT. It adds 69 tokens to every session and 828 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to mgrep-code-search, differing in 0 lines, and is treated as a copy.

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