mgrep is a command-line search tool that finds information by meaning across code, text, PDFs, and images, rather than matching only exact words. Developers and coding agents use it to index repositories and search local files or the web with natural-language queries. Its catalogue entries add commands, skills, instructions, and a plugin for integrating mgrep into agent workflows.
Borrowing it
Nothing to install: this file belongs to mixedbread-ai/mgrep. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/mixedbread-ai/mgrep/main/AGENTS.mdgit clone --depth 1 https://github.com/mixedbread-ai/mgrepWrote 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.
[](https://agentmods.dev/instructions/mixedbread-ai/mgrep/agents-md)<a href="https://agentmods.dev/instructions/mixedbread-ai/mgrep/agents-md"><img src="https://agentmods.dev/badge/instructions/mixedbread-ai/mgrep/agents-md/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/instructions/mixedbread-ai/mgrep/agents-md"><img src="https://agentmods.dev/badge/instructions/mixedbread-ai/mgrep/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.01917 | $0.01917 |
| Opus 5.5 | $0.00767 | $0.00767 |
| Sonnet 5.5 | $0.00383 | $0.00383 |
| Haiku 4.5 | $0.00192 | $0.00192 |
Grade A, and why
mgrep AGENTS.md 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 2mo 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.
How it starts
The opening of the file, as written. The whole thing — 269 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md
This file provides context and guidelines for AI coding agents working on the mgrep codebase. It follows the AGENT.md specification and incorporates best practices from Anthropic, OpenAI, and Google.
Project Overview
mgrep is a semantic search CLI tool that brings natural language understanding to code search. It's built with TypeScript and designed to work seamlessly with AI coding agents.
Core Purpose
- Replace pattern-based grep with semantic, natural-language search
- Index and search code, PDFs, images, and text files
- Integrate with coding agents (Claude Code, Codex, OpenCode, Factory Droid)
- Provide web search capabilities alongside local file search
Tech Stack
- Runtime: Node.js (ESM modules)
- Language: TypeScript 5.x with strict mode
- Package Manager: pnpm
- Linting/Formatting: Biome
- Testing: bats (Bash Automated Testing System)
- API: Mixedbread SDK for semantic search
Project Structure
mgrep/
├── src/
│ ├── index.ts # CLI entry point, command registration
│ ├── commands/ # CLI command implementations
│ │ ├── login.ts # Authentication flow
│ │ ├── logout.ts # Session cleanup
│ │ ├── search.ts # Core search functionality
│ │ ├── switch-org.ts # Organization switching
│ │ ├── watch.ts # File watching and indexing
│ │ └── watch_mcp.ts # MCP (Model Context Protocol) watch
│ ├── install/ # Agent integration installers
│ │ ├── claude-code.ts # Claude Code integration
│ │ ├── codex.ts # Codex integration
│ │ ├── droid.ts # Factory Droid integration
│ │ └── opencode.ts # OpenCode integration
│ └── lib/ # Shared utilities and core logic
│ ├── auth.ts # Authentication utilities
│ ├── config.ts # Configuration management
│ ├── context.ts # Execution context
│ ├── file.ts # File operations
│ ├── git.ts # Git integration
│ ├── logger.ts # Logging utilities
│ ├── organizations.ts # Organization management
│ ├── store.ts # Mixedbread store operations
│ ├── sync-helpers.ts # Synchronization utilities
│ ├── token.ts # Token management
│ ├── utils.ts # General utilities
│ └── warning.ts # Warning display utilities
├── test/
│ ├── test.bats # Integration tests
│ └── assets/ # Test fixtures
├── plugins/ # Plugin definitions
├── guides/ # Documentation guides
└── .claude-plugin/ # Claude Code plugin config
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.
- 2mo ago First seen · 269 lines · 1,917 tokens per session scan A aedaed942d07
mgrep AGENTS.md is an instructions file published in the GitHub repository mixedbread-ai/mgrep (4,426 stars, last pushed 6mo ago), licensed Apache-2.0. It adds 1,917 tokens to every session, about $0.0077 per session on Opus 5.5. 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.
Other instructions, from other repositories
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
deepseek-harness AGENTS.md
AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.