What is mgrep-code-search?

A semantic code-search tool for exploring large or deeply nested codebases using natural-language descriptions of what you are looking for.

Use it to find features, understand code intent, and explore projects with many files or nested directories.

It can help locate related code by meaning when file structures are unfamiliar or ordinary text search is not enough.

mgrep-code-search — Plugin by intellectronica

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.

Claude Code

/plugin marketplace add intellectronica/agent-skills

agentmods

npx agentmods add plugins/intellectronica/agent-skills/mgrep-code-search

Clone the repo

git clone --depth 1 https://github.com/intellectronica/agent-skills

Made for: Claude Code.

Per session not measured What this adds to a session before it is invoked.

When invoked not measured Not applicable: nothing here is loaded into a session.

Security scan A 0 findings. Scan, not verified.

Origin original No closer match found in the catalogue.

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 2d 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.

plugins/mgrep-code-search/.claude-plugin/plugin.json · 13 lines

What it actually says

{
  "name": "mgrep-code-search",
  "version": "0.1.1768936949",
  "description": "Semantic code search using mgrep for efficient codebase exploration. This skill should be used when searching or exploring codebases with more than 30 non-gitignored files and/or nested directory structures. It provides natural language semantic search that complements traditional grep/ripgrep for finding features, understanding intent, and exploring unfamiliar code.",
  "author": {
    "name": "Eleanor Berger",
    "url": "https://intellectronica.net"
  },
  "repository": "https://github.com/intellectronica/agent-skills",
  "homepage": "https://github.com/intellectronica/agent-skills/tree/main/plugins/mgrep-code-search",
  "license": "MIT"
}

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.

2d ago First seen · 13 lines scan A e93a2e219441

Subscribe to this mod's changes

mgrep-code-search is a plugin published in the GitHub repository intellectronica/agent-skills (290 stars, last pushed 4mo ago), licensed CC0-1.0. Its token cost is not measured: this kind of file is read by the harness, not the model. 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.

Research agent skills

mgrep-code-search

Getting it into your agent

Grade A, and why

Nothing flagged

What it actually says

What this file has done since we first saw it

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