What is ai-performance-mate-extension AGENTS.md?

Project instructions for an AI Mate extension that exposes Symfony profiler data as MCP tools. Symfony is a PHP framework, and a profiler records application runtime information for debugging.

Use them when developing or reviewing this PHP package, especially its five profiler tools, dependency-injection setup, tests, and PHPStan checks.

They tell an agent how to install, test, analyze, and structure the extension, while highlighting requirements such as public tool services and blocking static-analysis errors.

How skrepr/ai-performance-mate-extension configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to skrepr/ai-performance-mate-extension. 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/skrepr/ai-performance-mate-extension/master/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/skrepr/ai-performance-mate-extension

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/skrepr/ai-performance-mate-extension/agents-md/github.svg)](https://agentmods.dev/instructions/skrepr/ai-performance-mate-extension/agents-md)

Your own site

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

Per session 448 This file is loaded in full into every session.

When invoked 448 The same file — it is already loaded in full.

Security scan A 0 findings. 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	$0.00448	$0.00448
Opus 5.5	$0.00179	$0.00179
Sonnet 5.5	$0.00090	$0.00090
Haiku 4.5	$0.00045	$0.00045

Measured 2mo ago against content hash 323680c1617b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

ai-performance-mate-extension 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.

AGENTS.md · 36 lines

What it actually says

AGENTS.md

AI Mate extension (Composer package) that exposes Symfony profiler runtime data as MCP tools for AI agents. Dev-only; PHP ≥ 8.2, Symfony 6.4/7.x/8.x, DBAL 3.6+/4.x.

Commands

composer install
composer test        # PHPUnit
composer phpstan     # PHPStan level 8 + strict rules — findings are blocking

End-to-end smoke test (this repo is itself a Mate root project):

vendor/bin/mate mcp:tools:list                     # all 5 tools visible?
vendor/bin/mate mcp:tools:call slow_queries '{}'   # full DI chain

Architecture

src/*Tool.php — the 5 MCP tools (entry layer): thin mappers from core output to JSON
src/ProfileReader.php — reads profiles via FileProfilerStorage; OOM guards + in-process cache (core)
src/QueryShapes.php — pure aggregation: shape grouping, N+1 heuristics, before/after diff (core)
src/Sql.php — pure SQL/backtrace helpers (core)
config/services.php — DI config, loaded by Mate; tool services MUST be public (the MCP SDK resolves via $container->has(FQCN))
Registration with consumers via extra.ai-mate in composer.json; see vendor/bin/mate discover

Conventions

All text (comments, tool descriptions, error messages, docs) in English; INSTRUCTIONS.md is the agent-facing tool guide
Strict types; no empty(); explicit checks (null ===, '' ===)
Pure logic belongs in static helper classes (Sql, QueryShapes) — testable without IO; tools stay thin
Tool output follows the Mate design principles: distill instead of dump, hard limits with a truncation signal (sql_shape_truncated), sensitive data stripped
ProfileReader::profileFilePath() mirrors Symfony's path scheme; the schema-pin test in ProfileReaderTest fails if Symfony changes it

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 · 36 lines · 448 tokens per session scan A 323680c1617b

Subscribe to this mod's changes

ai-performance-mate-extension AGENTS.md is an instructions file published in the GitHub repository skrepr/ai-performance-mate-extension (0 stars, last pushed 3mo ago), licensed MIT. It adds 448 tokens to every session, about $0.0018 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 2026-08-31.

Debugging

ai-performance-mate-extension AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
ai-performance-mate-extension AGENTS.mdskrepr/ai-performance-mate-extension	Instructions file	0	3mo ago	MIT	A	448	Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	9,719	GitHub Copilot
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	5,516	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	today	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	today	MIT	A	4,680	Codex, OpenCode
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	3,093	GitHub Copilot
vscode model-prompts.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	2,022	GitHub Copilot

ai-performance-mate-extension: Instructions file for Codex