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.
curl -O https://raw.githubusercontent.com/skrepr/ai-performance-mate-extension/master/AGENTS.mdgit clone --depth 1 https://github.com/skrepr/ai-performance-mate-extensionWrote 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/skrepr/ai-performance-mate-extension/agents-md)<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="Measured on agentmods" 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 | $0.00448 | $0.00448 |
| Opus 5 | $0.00224 | $0.00224 |
| Sonnet 5 | $0.00090 | $0.00090 |
| Haiku 4.5 | $0.00045 | $0.00045 |
Grade A, and why
ai-performance-mate-extension AGENTS.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 6d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
AGENTS.md
AI Mate extension (Composer package) that exposes Symfony profiler runtime data as MCP tools for AI agents. Dev-only; PHP ≥ 8.2, Symfony 6.4/7.x/8.x, DBAL 3.6+/4.x.
Commands
composer install
composer test # PHPUnit
composer phpstan # PHPStan level 8 + strict rules — findings are blocking
End-to-end smoke test (this repo is itself a Mate root project):
vendor/bin/mate mcp:tools:list # all 5 tools visible?
vendor/bin/mate mcp:tools:call slow_queries '{}' # full DI chain
Architecture
src/*Tool.php— the 5 MCP tools (entry layer): thin mappers from core output to JSONsrc/ProfileReader.php— reads profiles viaFileProfilerStorage; OOM guards + in-process cache (core)src/QueryShapes.php— pure aggregation: shape grouping, N+1 heuristics, before/after diff (core)src/Sql.php— pure SQL/backtrace helpers (core)config/services.php— DI config, loaded by Mate; tool services MUST bepublic(the MCP SDK resolves via$container->has(FQCN))- Registration with consumers via
extra.ai-mateincomposer.json; seevendor/bin/mate discover
Conventions
- All text (comments, tool descriptions, error messages, docs) in English;
INSTRUCTIONS.mdis 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 inProfileReaderTestfails if Symfony changes it
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.
- 6d ago First seen · 36 lines · 448 tokens per session scan A 323680c1617b
ai-performance-mate-extension AGENTS.md is an instructions file published in the GitHub repository skrepr/ai-performance-mate-extension (0 stars, last pushed 1mo ago), licensed MIT. It adds 448 tokens to every session, about $0.0022 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 2026-08-31.
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