Borrowing it
Nothing to install: this file belongs to enuno/tailscale-acl. 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/enuno/tailscale-acl/main/AGENTS.mdgit clone --depth 1 https://github.com/enuno/tailscale-aclWrote 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/enuno/tailscale-acl/agents-md)<a href="https://agentmods.dev/instructions/enuno/tailscale-acl/agents-md"><img src="https://agentmods.dev/badge/instructions/enuno/tailscale-acl/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/enuno/tailscale-acl/agents-md"><img src="https://agentmods.dev/badge/instructions/enuno/tailscale-acl/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 | $0.01067 | $0.01067 |
| Opus 5.5 | $0.00427 | $0.00427 |
| Sonnet 5.5 | $0.00213 | $0.00213 |
| Haiku 4.5 | $0.00107 | $0.00107 |
Grade A, and why
tailscale-acl 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 — 144 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AI Agent Instructions for Tailscale ACL Repository
Project Overview
This repository manages Tailscale Access Control Lists through GitOps methodology, enabling infrastructure-as-code for network security policies. The primary goal is maintaining secure, reliable, and auditable network access control.
Core Technologies
- Tailscale: Zero-trust network access platform with WireGuard-based mesh networking
- GitOps: Infrastructure management through Git workflows and automated deployment
- HuJSON: Human-readable JSON format for ACL policies with comments and trailing commas
- GitHub Actions: CI/CD pipeline for ACL validation and deployment
Repository Structure
Essential Files
policy.hujson: Main Tailscale ACL policy file (NEVER rename this file).github/workflows/tailscale.yml: GitHub Actions workflow for ACL synchronizationREADME.md: Project documentation and setup instructions
Configuration Files
.cursorrules,.clinerules: AI agent-specific configurations.yamllint,.prettierrc: Code quality and formatting tools.editorconfig: Cross-editor consistency settings.gitignore: Git ignore patterns for clean repository
Development Workflow
1. ACL Policy Changes
- Edit
policy.hujsonin feature branches only - Use HuJSON format with comments and trailing commas
- Include test cases for all new access rules
- Follow least privilege security principles
2. Git Workflow
# Create feature branch
git checkout -b feature/add-user-group
# Make changes to policy.hujson
# Commit with descriptive messages
git commit -m "feat: add engineering team access to production servers"
# Push and create pull request
git push origin feature/add-user-group
3. CI/CD Process
- Pull requests trigger ACL validation (test action)
- Merging to main triggers deployment (apply action)
- Monitor GitHub Actions logs for deployment status
- Failed deployments prevent policy updates
Tailscale ACL Best Practices
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 · 144 lines · 1,067 tokens per session scan A 5614f2fbd915
tailscale-acl AGENTS.md is an instructions file published in the GitHub repository enuno/tailscale-acl (5 stars, last pushed 11mo ago), licensed Apache-2.0. It adds 1,067 tokens to every session, about $0.0043 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).
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.