What is saw-mcp AGENTS.md?

Repository instructions for AI coding agents working on Snyk API & Web MCP, a Python package that exposes security-scanning tools through MCP. They describe the project, layout, setup, commands, configuration, and audit logging.

Use them when an AI coding agent is editing, testing, configuring, or reviewing the saw-mcp codebase.

They give an agent the project context and working rules needed to make changes in the repository without guessing its structure or commands.

How snyk/saw-mcp configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to snyk/saw-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/snyk/saw-mcp/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/snyk/saw-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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/snyk/saw-mcp/agents-md/github.svg)](https://agentmods.dev/instructions/snyk/saw-mcp/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/snyk/saw-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/snyk/saw-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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/snyk/saw-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/snyk/saw-mcp/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 1,978 This file is loaded in full into every session.

When invoked 1,978 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	$0.01978	$0.01978
Opus 5	$0.00989	$0.00989
Sonnet 5	$0.00396	$0.00396
Haiku 4.5	$0.00198	$0.00198

Measured yesterday against content hash 4bc698da48ef, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

saw-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 yesterday.

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 · 172 lines

How it starts

The opening of the file, as written. The whole thing — 172 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

Guidance for AI coding agents (Cursor, Claude Code, Copilot, etc.) working in this repo.

What this is

saw-mcp is the Snyk API & Web MCP server — a FastMCP 2.0 Python package that exposes probely_* tools so AI assistants can onboard DAST targets, configure authentication, run scans, and triage findings. It is distributed via PyPI (snyk-apiweb-mcp), the Cursor Marketplace (.cursor-plugin/), and the MCP registry (server.json).

Naming: Snyk API & Web was formerly Probely. The platform API (api.probely.com), console (plus.probely.app), and MCP tool names (probely_*) still use the legacy prefix. Config and env vars use SAW / saw / MCP_SAW_*.

Owner: @snyk/emerging-technologies-solutions_probely (see .github/CODEOWNERS).

Repo layout

snyk_apiweb/           Python package — server entry point and all MCP tools
  server.py            `main()` / `saw-mcp` console script
  tools.py             FastMCP tool definitions (`probely_*`)
  probely_client.py    HTTP client for api.probely.com (mocked in tests)
  config.py            YAML + env config loading, tool allow/deny lists
  audit.py             Tool-call audit logging
config/
  config.yaml.dist     Committed template — copy to config/config.yaml locally
  saw_rules.mdc        Cursor plugin rules (shipped via .cursor-plugin/)
  skills/              Agent skills for web/API target onboarding workflows
tests/                 pytest suite (network calls mocked — no live API key needed)
scripts/
  dev.sh               FastMCP hot-reload dev server
  package.sh           Build release tarball under dist/
  setup-env.sh         Interactive .env writer (API key)
  setup-playwright.sh  Install playwright-cli + Chromium for web-target smoke tests
docs/installation-guides/   Per-IDE setup docs
.cursor-plugin/        Cursor Marketplace manifest (version must match package)
server.json            MCP registry metadata (version must match package)

User-facing docs: README.md (install), USER_GUIDE.md (tools), prompts.md (example prompts).

Read the full file on GitHub · 172 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.

yesterday First seen · 172 lines · 1,978 tokens per session scan A 4bc698da48ef

Subscribe to this mod's changes

saw-mcp AGENTS.md is an instructions file published in the GitHub repository snyk/saw-mcp (8 stars, last pushed today), licensed Apache-2.0. It adds 1,978 tokens to every session, about $0.0099 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 2026-09-09.

Building agents Security

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.

vercel/next.js · 7,296 tokens

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.

openai/codex · 5,153 tokens

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).

microsoft/vscode · 6,785 tokens

saw-mcp: Instructions file for Codex