mgrep

mgrep is a skill for Claude Code, Codex from julianromli/droid-factory-template. It costs 36 tokens per session (288 once invoked), scanned A, original, MIT.

A guide for using mgrep, a semantic search tool that finds local code by describing its meaning rather than matching only exact words.

In plain words
What is it for?
Use it to search a local project for concepts such as parser types, data structures, or implementation details.
Why use it?
It helps locate relevant code when you do not know the exact names or wording used in the files.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

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/julianromli/droid-factory-template/mgrep
Any agent
npx skills add julianromli/droid-factory-template --skill mgrep
Clone the repo
git clone --depth 1 https://github.com/julianromli/droid-factory-template

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

README.md
[![agentmods](https://agentmods.dev/badge/skills/julianromli/droid-factory-template/mgrep.svg)](https://agentmods.dev/skills/julianromli/droid-factory-template/mgrep)
Your own site
<a href="https://agentmods.dev/skills/julianromli/droid-factory-template/mgrep"><img src="https://agentmods.dev/badge/skills/julianromli/droid-factory-template/mgrep.svg" alt="Measured on agentmods" height="20"></a>
Per session 36 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 288 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found 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 5.1 $0.00036 $0.00288
Opus 5 $0.00018 $0.00144
Sonnet 5 $0.00007 $0.00058
Haiku 4.5 $0.00004 $0.00029

Measured 6d ago against content hash dd8b4dcf5fe9, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

mgrep 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 6d 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.

skills/mgrep/SKILL.md · 35 lines

What it actually says

When to use this skill

Whenever you need to search your local files. Do not use grep, use this skill instead.

How to use this skill

Use mgrep to search your local files. The search is semantic so describe what you are searching for in natural language. The results is the file path and the line range of the match.

Do

mgrep "What code parsers are available?"  # search in the current directory
mgrep "How are chunks defined?" src/models  # search in the src/models directory
mgrep -m 10 "What is the maximum number of concurrent workers in the code parser?"  # limit the number of results to 10

Don't

mgrep "parser"  # The query is to imprecise, use a more specific query
mgrep "How are chunks defined?" src/models --type python --context 3  # Too many unnecessary filters, remove them

Keywords

search, grep, files, local files, local search, local grep, local search, local grep, local search, local grep

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. 6d ago First seen · 35 lines · 36 tokens per session scan A dd8b4dcf5fe9

Subscribe to this mod's changes

mgrep is a skill published in the GitHub repository julianromli/droid-factory-template (52 stars, last pushed 9mo ago), licensed MIT. It adds 36 tokens to every session and 288 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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