What is ai-mate AGENTS.md?

A Symfony command-line assistant that discovers project tools from PHP methods and lets coding agents or developers run them.

Use it to expose Symfony project-aware tools, resources, and resource templates through the Mate command-line program.

It turns annotated PHP methods into discoverable commands with structured input descriptions, without requiring the Model Context Protocol.

How symfony/ai-mate configures Codex and OpenCode

About the project

Symfony AI Mate is a command-line assistant and MCP server that gives coding agents access to development tools tailored to a Symfony project. Developers and agents use it during development to inspect tools and run project-aware commands directly.

symfony/ai-mate · 43 stars · on GitHub · symfony.com

Reuse

Borrowing it

Nothing to install: this file belongs to symfony/ai-mate. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/symfony/ai-mate/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/symfony/ai-mate

Made for: Codex, OpenCode.

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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/symfony/ai-mate/agents-md/github.svg)](https://agentmods.dev/instructions/symfony/ai-mate/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/symfony/ai-mate/agents-md"><img src="https://agentmods.dev/badge/instructions/symfony/ai-mate/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/symfony/ai-mate/agents-md"><img src="https://agentmods.dev/badge/instructions/symfony/ai-mate/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 2,008 This file is loaded in full into every session.

When invoked 2,008 The same file — it is already loaded in full.

Security scan B 1 finding. A grade says what 26 rules found in the file — not that it is safe.

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.

Model	Per session	Once invoked
Fable 5.1	$0.02008	$0.02008
Opus 5.5	$0.00803	$0.00803
Sonnet 5.5	$0.00402	$0.00402
Haiku 4.5	$0.00201	$0.00201

Measured 2mo ago against content hash 267038f39e28, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade B, and why

ai-mate AGENTS.md scanned grade B with 1 finding 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.

Unrestricted tool accessmediumExcessive agency

A wildcard tool grant or "run any command" leaves no least-privilege boundary at all.

- `src/Command/`: CLI commands (init, discover, clear-cache, debug:*, tools:*, resources:read)

AGENTS.md · 183 lines

How it starts

The opening of the file, as written. The whole thing — 183 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

AI agent guidance for the Mate component.

Component Overview

Standalone command-line assistant (vendor/bin/mate) that exposes project-aware development tools to coding agents and developers. Tools are plain PHP methods annotated with the native #[MateTool] attribute (resources/resource templates use #[MateResource] / #[MateResourceTemplate]); Mate discovers them by reflection and runs them from the CLI. Does not use MCP and does not integrate with the AI Bundle.

Architecture

Core Classes

App: Console application builder
ContainerFactory: DI container management with extension discovery
ComposerExtensionDiscovery: Discovers extensions via extra.ai-mate in composer.json
ReflectionDiscoverer: Scans directories for #[MateTool]/#[MateResource]/#[MateResourceTemplate] methods
SchemaGenerator / DocBlockParser: Build a JSON input schema from a method signature + @param PHPDoc
CapabilityRegistry: Feature-filtered lookup of discovered tools/resources
ToolInvoker / ResourceReader: Resolve the handler from the DI container and invoke it

Attributes

Symfony\AI\Mate\Attribute\MateTool: marks a method as a CLI tool (params name, title, description)
Symfony\AI\Mate\Attribute\MateResource: marks a method as a static resource
Symfony\AI\Mate\Attribute\MateResourceTemplate: marks a method as a templated resource

Key Directories

src/Command/: CLI commands (init, discover, clear-cache, debug:, tools:, resources:read)
src/Container/: DI container management
src/Discovery/: Reflection-based discovery + schema generation
src/Invocation/: Tool/resource invocation and argument casting
src/Capability/: Built-in tools
src/Bridge/: Embedded bridge packages (Symfony, Monolog)

Bridges

Symfony Bridge (src/Bridge/Symfony/): Container introspection and profiler access
Monolog Bridge (src/Bridge/Monolog/): Log search and analysis

Essential Commands

Read the full file on GitHub · 183 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.

2mo ago First seen · 183 lines · 2,008 tokens per session scan B 267038f39e28

Subscribe to this mod's changes

ai-mate AGENTS.md is an instructions file published in the GitHub repository symfony/ai-mate (43 stars, last pushed 10d ago), licensed MIT. It adds 2,008 tokens to every session, about $0.0080 per session on Opus 5.5. A static security scan graded it B with 1 finding (unrestricted tool access). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Building agents LLM Languages PHP ai debug dev symfony symfony-ai

ai-mate AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
ai-mate AGENTS.mdsymfony/ai-mate	Instructions file	43	10d ago	MIT	B	2,008	Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	yesterday	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

ai-mate: Instructions file for Codex