Borrowing it
Nothing to install: this file belongs to Ailian0206/mcp-guardian. 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/Ailian0206/mcp-guardian/main/AGENTS.mdgit clone --depth 1 https://github.com/Ailian0206/mcp-guardianWrote 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/ailian0206/mcp-guardian/agents-md)<a href="https://agentmods.dev/instructions/ailian0206/mcp-guardian/agents-md"><img src="https://agentmods.dev/badge/instructions/ailian0206/mcp-guardian/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/ailian0206/mcp-guardian/agents-md"><img src="https://agentmods.dev/badge/instructions/ailian0206/mcp-guardian/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 | $0.00465 | $0.00465 |
| Opus 5.5 | $0.00186 | $0.00186 |
| Sonnet 5.5 | $0.00093 | $0.00093 |
| Haiku 4.5 | $0.00047 | $0.00047 |
Grade A, and why
mcp-guardian 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.
What it actually says
MCP Guardian Agent Workflow
Product boundary
MCP Guardian is a pre-call policy gateway for MCP tools/call: allow / deny / redact / require_approval, plus audit replay.
Do not turn this into a generic Agent Trace platform, Prompt firewall, billing product, or multi-tenant enterprise SOC suite in the MVP.
Related portfolio projects（本 agent 不负责改这些仓，除非用户点名）:
evidence-graphai-photo-studio-cn
Engineering priorities
- Deterministic, explainable policy decisions.
- Local-first gateway; cloud dashboard is optional sync.
- Never upload plaintext secrets by default.
- Reproducible CI:
pnpm lint && pnpm typecheck && pnpm test.
GitHub + Claude PR（成本红线）
完整说明：docs/github-automation-playbook.md、.cursor/rules/pr-review-gate.mdc。
- 里程碑分支内小步 commit（可 push），默认不开 PR。
- 开 PR 前：
bash scripts/assert-can-open-pr.sh；只有里程碑才ALLOW_OPEN_PR=1后创建；开放 PR ≤ 1。 - Claude 每个 PR 只审一次（
pr-gate.sh有 flock；已审过则拒绝对第二次claude）。 - 有问题：修 →
SKIP_PR_REVIEW=1→ merge；禁止复审。 - 没问题：一次 gate 后 merge。
- 禁止并发审核；禁止为烧额度再跑 Bugbot。
- 不得手改审核标签或冒充审核评论。
Cost and external-write gates
Require explicit user authorization:
- Adding real cloud API keys for production sync smoke.
- Publishing npm packages.
- Changing license or making the repo private.
- Touching any repo other than
mcp-guardian.
Decision source
docs/product-redesign-2026-07-16.md（主路径）与 docs/product-plan.md（历史）。P0 变更先改决策文档。
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 First seen · 45 lines · 465 tokens per session scan A b7f3f5371bcd
mcp-guardian AGENTS.md is an instructions file published in the GitHub repository Ailian0206/mcp-guardian (1 stars, last pushed 3mo ago), licensed MIT. It adds 465 tokens to every session, about $0.0019 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.