What is aws-mcp-gateway AGENTS.md?

Repository instructions for a small Cloudflare Worker that provides explicitly defined, read-only AWS tools through MCP. They describe the project’s purpose, limits, workflow, commands, and code layout.

Guiding changes to the AWS MCP gateway, including installation, type checking, tests, coverage checks, local development, and pre-pull-request validation.

They give a coding agent the project rules and validation commands while making clear that arbitrary AWS commands, write operations, and secrets are out of scope.

How rafaself/aws-mcp-gateway configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to rafaself/aws-mcp-gateway. 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/rafaself/aws-mcp-gateway/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/rafaself/aws-mcp-gateway

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/rafaself/aws-mcp-gateway/agents-md/github.svg)](https://agentmods.dev/instructions/rafaself/aws-mcp-gateway/agents-md)

Your own site

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

Per session 1,400 This file is loaded in full into every session.

When invoked 1,400 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	$0.01400	$0.01400
Opus 5.5	$0.00560	$0.00560
Sonnet 5.5	$0.00280	$0.00280
Haiku 4.5	$0.00140	$0.00140

Measured 2mo ago against content hash cf902711bce8, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

aws-mcp-gateway 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 2mo 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 · 149 lines

How it starts

The opening of the file, as written. The whole thing — 149 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

Repository purpose

A minimal Cloudflare Worker MCP gateway for explicit, read-only AWS tools.

Hard boundaries:

No generic AWS CLI execution tool.
No arbitrary AWS API proxy.
No AWS write/management operations in the current read-only scope.
No secrets, local env files, tokens, credentials, or generated Wrangler state committed.

Workflow

Work from the related GitHub issue when available.
Keep PRs small and focused on the issue scope.
Prefer TDD when practical: write a failing test first, implement the smallest safe change, then refactor.
For non-trivial work, use the issue or spec as source of truth.
Do not expand scope beyond the issue without documenting why.
When blocked, leave a clear note with what was tried and what remains.

Development commands

pnpm install
pnpm run typecheck
pnpm test
pnpm run test:coverage
pnpm dev

Minimal local loop during development: typecheck, test, test:integrity.

Full pre-PR validation before opening a pull request: see README.md#testing (repo:safety, output:guardrail, verify:connector-contract, typecheck, test, test:integrity). CI also runs Gitleaks via .github/workflows/secret-scan.yml.

pnpm run typecheck is required before finishing any code changes.
pnpm test is required when code or behavior changes.
pnpm run test:coverage is recommended before larger PRs but not mandatory for trivial or docs-only changes.

Code organization

Source layout:

src/auth/              bearer auth and OAuth validation
src/auth/oauth/
src/aws/               AWS request client and service-specific clients
src/aws/cost-explorer/
src/aws/ec2/
src/aws/cloudwatch/
src/aws/lambda/
src/aws/logs/
src/aws/s3/
src/cache/             cache helpers
src/config/            env validation and gateway context
src/errors/            error classes and handling
src/mcp/               MCP server and tool registration
src/mcp/audit/         MCP tool audit payload builders
src/mcp/chatgpt/       ChatGPT catalog adapter
src/mcp/tools/definitions/  tool manifest factories
src/observability/     centralized runtime output sinks
src/security/          limits, dates, region validation, redaction helpers
src/test/              shared test setup and fixtures
infra/aws/             checked-in IAM policy template

Read the full file on GitHub · 149 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.

2mo ago First seen · 149 lines · 1,400 tokens per session scan A cf902711bce8

Subscribe to this mod's changes

aws-mcp-gateway AGENTS.md is an instructions file published in the GitHub repository rafaself/aws-mcp-gateway (0 stars, last pushed 4mo ago), licensed MIT. It adds 1,400 tokens to every session, about $0.0056 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.

Building agents Cloud DevOps and cloud aws chatgpt chatgpt-app cloudflare mcp mcp-server

aws-mcp-gateway AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
aws-mcp-gateway AGENTS.mdrafaself/aws-mcp-gateway	Instructions file	0	4mo ago	MIT	A	1,400	Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	yesterday	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

aws-mcp-gateway: Instructions file for Codex