Borrowing it
Nothing to install: this file belongs to Threat-Vector-Security/guardian-agent. 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/Threat-Vector-Security/guardian-agent/main/AGENTS.mdgit clone --depth 1 https://github.com/Threat-Vector-Security/guardian-agentWrote 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/threat-vector-security/guardian-agent/agents-md)<a href="https://agentmods.dev/instructions/threat-vector-security/guardian-agent/agents-md"><img src="https://agentmods.dev/badge/instructions/threat-vector-security/guardian-agent/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/threat-vector-security/guardian-agent/agents-md"><img src="https://agentmods.dev/badge/instructions/threat-vector-security/guardian-agent/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 | $0.01785 | $0.01785 |
| Opus 5.5 | $0.00714 | $0.00714 |
| Sonnet 5.5 | $0.00357 | $0.00357 |
| Haiku 4.5 | $0.00178 | $0.00178 |
Grade A, and why
guardian-agent 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.
Copies of this mod
2 near-identical copies found in the catalogue:
- guardian-agent CLAUDE.md — 86% identical, 84 lines differ
- guardian-agent GEMINI.md — 86% identical, 84 lines differ
How it starts
The opening of the file, as written. The whole thing — 84 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Repository Guidelines
Current product and module ownership
Guardian Agent 2 is the local security and ContextCypher architecture workspace. The package version in package.json is the release source of truth. The default entry point is src/security-main.ts, compiled to dist/security-main.js; it does not start the retained assistant runtime in src/index.ts.
src/security-workspace/: operation schemas and authorization (operations.ts), shared business rules (service.ts), loopback HTTP/session transport (server.ts), SQLite persistence (store.ts), CLI client/MCP transport, collectors, AWS, Entra and bounded AI.web/security/: Guardian shell and security pages.web/contextcypher/: the standalone-capable diagram, analysis and GRC workbench.web/shared/: shared browser file dialogs.scripts/: verification and packaging harnesses;docs/: current architecture, guides and explicitly marked historical material.src/runtime/,src/guardian/,src/tools/,src/channels/,src/index.tsandweb/public/retain legacy implementation and selected shared components. Their existence does not mean their assistant features ship in the default security application.
Read SECURITY.md, the conversion architecture, the operator guide, and the operation API reference before changing current trust boundaries or capabilities.
No hardcoded deliverables or test-passing fallbacks (CRITICAL)
Never add canned domain output, fabricated findings, sample applications, scripted answers, or fallback implementations to make a requested workflow appear successful. Model generation must come from the configured provider; collection must report observed evidence and unavailable coverage honestly. Explicitly selected, bundled ContextCypher examples are legitimate product content, not fallback evidence or generated results.
For retained orchestration code, Guardian may route, retry, verify generic evidence and report failure; the delegated worker owns the actual implementation in the target workspace. If a test passes because Guardian recognizes a prompt, filename, selector set or expected answer and fills it in, remove the workaround and fix the owning contract.
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 · +9 lines · -1,149 tokens per session 9aea3ea235f7
- 1mo ago First seen · 75 lines · 2,934 tokens per session scan A 128b0a30100c
guardian-agent AGENTS.md is an instructions file published in the GitHub repository Threat-Vector-Security/guardian-agent (13 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 1,785 tokens to every session, about $0.0071 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 2026-08-30.
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).
deno copilot-instructions.md
Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.