openapi-tools-mcp: Instructions file for Codex

AGENTS.md

openapi-tools-mcp AGENTS.md is an instructions file for Codex, OpenCode from kardaj/openapi-tools-mcp. It costs 353 tokens per session, scanned A, original, MIT.

A project instruction file for guiding coding agents working on an OpenAPI tools server. It defines design principles, quality checks, and rules for keeping tools, documentation, and tests aligned.

In plain words
What is it for?
Use it to guide implementation work, review pull requests, update MCP tool descriptions and schemas, and keep the README and regression tests current.
Why use it?
It gives the agent clear project-specific rules before changes are made, reducing inconsistent code, outdated documentation, and missed checks.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md.

This is kardaj/openapi-tools-mcp's own configuration. It tells Codex and OpenCode how to work on openapi-tools-mcp 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 openapi-tools-mcp configures →

Reuse

Borrowing it

Nothing to install: this file belongs to kardaj/openapi-tools-mcp. 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/kardaj/openapi-tools-mcp/master/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/kardaj/openapi-tools-mcp

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.

agentmods badge for openapi-tools-mcp AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/kardaj/openapi-tools-mcp/agents-md/github.svg)](https://agentmods.dev/instructions/kardaj/openapi-tools-mcp/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/kardaj/openapi-tools-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/kardaj/openapi-tools-mcp/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.

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Your own site · 80×15
<a href="https://agentmods.dev/instructions/kardaj/openapi-tools-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/kardaj/openapi-tools-mcp/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 353 This file is loaded in full into every session.
When invoked 353 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 $0.00353 $0.00353
Opus 5.5 $0.00141 $0.00141
Sonnet 5.5 $0.00071 $0.00071
Haiku 4.5 $0.00035 $0.00035

Measured 1mo ago against content hash e983c13e7fc2, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

openapi-tools-mcp 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 1mo 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 · 21 lines

What it actually says

  • never use pip. Use uv pip instead.
  • keep README.md up to date whenever the server changes.

Design Philosophy

  • MCP tools should be self-describable: generated tool descriptions, parameter schemas, README examples, and tests should tell the same story without requiring users to inspect implementation code.
  • Keep the public tool surface small and flexible: prefer extending existing tools and input shapes when that preserves compatibility, and avoid adding narrowly scoped tool names unless a distinct workflow genuinely requires one.

Quality Gates

  • MCP server self-documentation is part of the public API. When a change affects tool behavior, inputs, outputs, caching, errors, or supported sources, the implementation quality gate must inspect generated MCP tool metadata and verify that descriptions and parameter schemas are up to date with the shipped features. Add or update regression tests for generated tool metadata when practical.

Agent Workflow

This section is managed by agent-flow sync; do not edit it directly. Add project-specific instructions outside the agent-flow markers.

  • Before making implementation changes, checking PR state, addressing PR comments, or running PR checks, run .agent-flow/cli.sh agent prompt implement and follow its output.
  • For requests to change quality gates, prompts, or project knowledge, treat it as configuration work: update durable hooks in agent-flow.config after inspecting .agent-flow/cli.sh agent config help, validate with .agent-flow/cli.sh agent validate config --intended <path>, then run .agent-flow/cli.sh sync; durable prompt behavior lives in package templates and .agent-flow/templates overrides; inspect prompts with .agent-flow/cli.sh agent prompt <mode>.
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. 1mo ago Changed · +1 lines · +102 tokens per session e983c13e7fc2
  2. 2mo ago First seen · 20 lines · 251 tokens per session scan A 87e41652e1fd

Subscribe to this mod's changes

openapi-tools-mcp AGENTS.md is an instructions file published in the GitHub repository kardaj/openapi-tools-mcp (0 stars, last pushed 26d ago), licensed MIT. It adds 353 tokens to every session, about $0.0014 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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