mcp-audit: Instructions file for Codex

AGENTS.md

mcp-audit AGENTS.md is an instructions file for Codex, OpenCode from P4ST4S/mcp-audit. It costs 2,308 tokens per session, scanned A, original, Apache-2.0.

Project instructions for mcp-audit, a Go security and monitoring proxy for MCP servers. They explain the code layout, style rules, build commands and testing requirements.

In plain words
What is it for?
Use them when contributing to mcp-audit, especially to build, lint, run race-detection tests, understand the Go project structure, and prepare a pull request.
Why use it?
They give coding agents the repository’s working rules before they change code. This helps prevent incorrect builds, missed checks and changes that do not match the project’s conventions.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions CLAUDE.md; mentions Claude Code; mentions AGENTS.md.

This is P4ST4S/mcp-audit's own configuration. It tells Codex and OpenCode how to work on mcp-audit itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything mcp-audit configures →

Reuse

Borrowing it

Nothing to install: this file belongs to P4ST4S/mcp-audit. 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/P4ST4S/mcp-audit/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/P4ST4S/mcp-audit

Made for: Codex, OpenCode.

Wrote this? Show the measurements

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README.md
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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.

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<a href="https://agentmods.dev/instructions/p4st4s/mcp-audit/agents-md"><img src="https://agentmods.dev/badge/instructions/p4st4s/mcp-audit/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 2,308 This file is loaded in full into every session.
When invoked 2,308 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.02308 $0.02308
Opus 5.5 $0.00923 $0.00923
Sonnet 5.5 $0.00462 $0.00462
Haiku 4.5 $0.00231 $0.00231

Measured 9d ago against content hash 27b6880bb0f5, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mcp-audit 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 9d 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 · 120 lines

How it starts

The opening of the file, as written. The whole thing — 120 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

Guidance for AI coding agents (Claude Code, Cursor, Codex, Jules, Amp, etc.) contributing to mcp-audit. Read this in full before opening a PR.

mcp-audit is a security and observability proxy for MCP (Model Context Protocol) servers, written in Go. It records signed audit trails, enforces policies, applies rate limits, and exports OTLP traces + Prometheus metrics. See README.md for what it does and why; this file is about how to work on it.

Required agent skills

Agents MUST read and apply the following project-local skills whenever their trigger applies. Read the relevant SKILL.md before starting that work and follow its referenced guidance as needed; merely listing a skill is not using it.

Skill Required when
golang-pro Writing, changing, or reviewing Go code, including tests. Pay particular attention to error handling, context cancellation, goroutine lifetimes, and race safety.
differential-review Reviewing code changes before reporting them ready for a PR. Inspect affected callers, security boundaries, compatibility, and test coverage; address findings before handoff. Documentation-only and formatting-only changes are exempt.
variant-analysis Fixing a confirmed bug or vulnerability. Search for the same root cause across related packages and transports, and report which matches are real. It is not required without a known bug.

These requirements apply to every agent harness, including tools that do not discover .agents/skills/ automatically. In that case, explicitly load the files into the agent's context. If a required skill is missing, follow the project-only setup in CONTRIBUTING.md. If it cannot be loaded, report the blocker rather than claiming the required review is complete.

Repository rules in this file and STABILITY.md take precedence over generic skill recommendations. In particular, skills do not introduce a new coverage threshold, require adding golangci-lint, or justify new abstractions or dependencies on their own. The build, test, and lint commands below remain required for code changes.

Read the full file on GitHub · 120 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.

  1. 9d ago Changed · +16 lines · +444 tokens per session 27b6880bb0f5
  2. 10d ago Changed 6e7cf52451b6
  3. 1mo ago First seen · 104 lines · 1,864 tokens per session scan A 521c51306fcb

Subscribe to this mod's changes

mcp-audit AGENTS.md is an instructions file published in the GitHub repository P4ST4S/mcp-audit (8 stars, last pushed 9d ago), licensed Apache-2.0. It adds 2,308 tokens to every session, about $0.0092 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.

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