Borrowing it
Nothing to install: this file belongs to mbvillaverde/openapi-atlas-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.
curl -O https://raw.githubusercontent.com/mbvillaverde/openapi-atlas-mcp/main/AGENTS.mdgit clone --depth 1 https://github.com/mbvillaverde/openapi-atlas-mcpWrote 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/mbvillaverde/openapi-atlas-mcp/agents-md)<a href="https://agentmods.dev/instructions/mbvillaverde/openapi-atlas-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/mbvillaverde/openapi-atlas-mcp/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 | $0.00594 | $0.00594 |
| Opus 5 | $0.00297 | $0.00297 |
| Sonnet 5 | $0.00119 | $0.00119 |
| Haiku 4.5 | $0.00059 | $0.00059 |
Grade A, and why
openapi-atlas-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 7d 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.
How it starts
The opening of the file, as written. The whole thing — 61 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md — Guide for AI-assisted contributors
How to run tests
pytest # all tests
pytest tests/unit/ # unit only
pytest tests/integration/ # integration only
pytest --cov # with coverage
Lint and typecheck (must pass)
ruff check src/openapi_atlas_mcp tests
mypy src/openapi_atlas_mcp --strict
Where things live
src/openapi_atlas_mcp/
models.py — Pydantic config models (AuthConfig, ServiceConfig, AtlasConfig, OperationRecord)
config.py — Config loading, validation, path discovery
cli.py — Typer CLI entry point (serve, init, --version)
cli_init.py — Interactive config wizard
fetch.py — SpecFetcher: HTTP fetching, auto-discovery, retry, single-flight dedupe
parse.py — Spec parsing, Swagger 2.0 → 3.0 conversion, $ref detection
resolve.py — $ref resolver with cycle detection and broken-ref markers
index.py — SpecIndex: tokenization, weighted scoring, search
cache.py — SpecCache: 3-layer cache (memory, disk, result)
warnings.py — ServiceWarning, ServiceStatus, ServiceHealthTracker
search.py — search_endpoints, closest_match (typo correction), collect_warnings
detail.py — get_endpoint_detail, suggest_path
tools.py — Pydantic output models (SearchMatch, SearchResult, EndpointDetail, etc.)
server.py — ServerContext, MCP tool registration, lifespan, startup/shutdown
Conventions
from __future__ import annotationsin every moduleasyncio_mode = "auto"— no@pytest.mark.asyncioneededfilterwarnings = ["error"]— warnings are test failures- Package name:
openapi-atlas-mcp(notswagger-index-mcp) - Config file:
.openapi-atlas.json - Env var for config path:
OPENAPI_ATLAS_CONFIG - Cache dir:
~/.openapi-atlas/cache/ - Secrets referenced by env-var name only, never inline
BDD task pattern
Each task group in tasks.md follows:
- RED — Write failing tests referencing spec scenarios
- GREEN — Implement to make tests pass
- REFACTOR — Clean up
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.
- 7d ago First seen · 61 lines · 594 tokens per session scan A 66f1913a0f2c
openapi-atlas-mcp AGENTS.md is an instructions file published in the GitHub repository mbvillaverde/openapi-atlas-mcp (0 stars, last pushed 1mo ago), licensed MIT. It adds 594 tokens to every session, about $0.0030 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.
Other instructions, from other repositories
vibe-coding-prompt-template backend.instructions.md
Instructions for KhazP/vibe-coding-prompt-template: Read AGENTS.md, agentdocs/techstack.md, and agentdocs/codepatterns.md.
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
codex AGENTS.md
AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, applying the notice (cutover) and fallback chain (never fail the build).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.