Borrowing it
Nothing to install: this file belongs to decoy-run/decoy-redteam. 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/decoy-run/decoy-redteam/main/AGENTS.mdgit clone --depth 1 https://github.com/decoy-run/decoy-redteamWrote 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/decoy-run/decoy-redteam/agents-md)<a href="https://agentmods.dev/instructions/decoy-run/decoy-redteam/agents-md"><img src="https://agentmods.dev/badge/instructions/decoy-run/decoy-redteam/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.
<a href="https://agentmods.dev/instructions/decoy-run/decoy-redteam/agents-md"><img src="https://agentmods.dev/badge/instructions/decoy-run/decoy-redteam/agents-md.svg" alt="Reviewed on agentmods" width="80" 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 | $0.01499 | $0.01499 |
| Opus 5.5 | $0.00600 | $0.00600 |
| Sonnet 5.5 | $0.00300 | $0.00300 |
| Haiku 4.5 | $0.00150 | $0.00150 |
Grade A, and why
decoy-redteam 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.
How it starts
The opening of the file, as written. The whole thing — 135 lines — stays where its author put it; the contents beside it link to each section on GitHub.
decoy-redteam — Agent Reference
Autonomous red team tool for MCP servers. Zero dependencies. Node.js >= 18.
What This Tool Does
Connects to MCP servers, sends adversarial payloads to their tools, and reports exploitable vulnerabilities. Three layers of attack sophistication: deterministic (free), AI-adaptive (Guard Pro), autonomous cross-server (Guard Pro).
Architecture
decoy-redteam/
├── index.mjs — public API re-exports
├── bin/cli.mjs — CLI entry point
├── lib/
│ ├── attacks.mjs — 53 attack descriptors (pure data, no side effects)
│ ├── engine.mjs — discover → probe → plan → execute → build stories
│ ├── transport.mjs — MCP stdio connection (persistent, pooled)
│ ├── coverage.mjs — honest coverage % calculation
│ └── report.mjs — JSON + SARIF output
├── test/
│ ├── fixtures/mock-server.mjs — deliberately vulnerable MCP server
│ ├── attacks.test.mjs
│ ├── engine.test.mjs
│ ├── coverage.test.mjs
│ └── cli.test.mjs
└── package.json — zero dependencies, ES modules
Attack Categories
| Category | Count | What it tests |
|---|---|---|
| input-injection | ~16 | SQL, command, path traversal, SSRF, template injection |
| prompt-injection | ~10 | Direct override, role hijack, indirect via output, encoding, multi-turn |
| credential-exposure | ~8 | .env, cloud creds, SSH keys, shell history, error oracle |
| protocol-attacks | ~7 | Malformed JSON-RPC, capability escalation, replay, method injection |
| schema-boundary | ~7 | Type coercion, null bytes, overflow, extra props, NoSQL operators |
| privilege-escalation | ~5 | Scope escape, undeclared access, dotfiles, argument smuggling |
Total: 54 (run grep -c "^ id:" lib/attacks.mjs to confirm).
Safety Model
- Default: dry-run (shows plan, executes nothing)
--live: requires interactive confirmation, read-only + protocol attacks only--live --full: includes potentially-destructive attacks, extra warning- No
--yesflag. Deliberate friction. DECOY_REDTEAM_CONFIRM=yesenv var for CI only
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.
- 1mo ago Changed · +12 lines · +187 tokens per session 06635a66db01
- 1mo ago First seen · 123 lines · 1,312 tokens per session scan A 0607b3842093
decoy-redteam AGENTS.md is an instructions file published in the GitHub repository decoy-run/decoy-redteam (2 stars, last pushed 1mo ago), licensed MIT. It adds 1,499 tokens to every session, about $0.0060 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.
Other instructions, from other repositories
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).
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.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
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.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
vscode model-prompts.instructions.md
Model-specific prompt authoring and registry guidelines.