What is tailscale-mcp AGENTS.md?

A project guide for tailscale-mcp, a Python service that controls Tailscale networks through the Model Context Protocol and also provides a web interface.

Use it when running checks, starting the web app or MCP server, changing dependencies, or finding the code for tools, network operations, API access, data models, and monitoring.

It gives developers the project structure, development commands, service ports, and testing requirements needed to work on the system correctly.

How sandraschi/tailscale-mcp configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to sandraschi/tailscale-mcp. 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/sandraschi/tailscale-mcp/master/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/sandraschi/tailscale-mcp

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/sandraschi/tailscale-mcp/agents-md/github.svg)](https://agentmods.dev/instructions/sandraschi/tailscale-mcp/agents-md)

Your own site

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

Per session 776 This file is loaded in full into every session.

When invoked 776 The same file — it is already loaded in full.

Security scan C 2 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	$0.00776	$0.00776
Opus 5.5	$0.00310	$0.00310
Sonnet 5.5	$0.00155	$0.00155
Haiku 4.5	$0.00078	$0.00078

Measured 1mo ago against content hash 8738dad72cda, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade C, and why

tailscale-mcp AGENTS.md scanned grade C with 2 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.

Downloads and executes remote codehighSupply chain

curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.

or installable via `curl -fsSL https://lmstudio.ai/install.sh | bash`).

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

or installable via `curl -fsSL https://lmstudio.ai/install.sh | bash`).

AGENTS.md · 63 lines

How it starts

The opening of the file, as written. The whole thing — 63 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Agent Workflow Recollection for tailscale-mcp

Project Identity

Repo: tailscale-mcp — FastMCP 3.2+ Tailscale network controller
Python: >=3.12, uses uv for package management
Framework: FastMCP 3.2 with portmanteau tool pattern
Webapp: React/Vite frontend (port 10820) + FastAPI backend (port 10821)

Key Architecture

src/tailscalemcp/
  tools/           # MCP tool surface (portmanteau pattern)
  operations/      # Business logic layer
  client/          # Tailscale API client with rate limiting + retry
  models/          # Pydantic models
  server.py        # FastAPI backend for web_sota
  mcp_server.py    # FastMCP server setup

Common Tasks

Run all checks: uv run ruff check . && uv run mypy src/tailscalemcp && uv run pytest
Start webapp: .\start.ps1 (launches backend + frontend)
Start MCP only: uv run python -m tailscalemcp
Run tests: uv run pytest -v
Add dependency: Add to pyproject.toml then uv lock && uv sync

Ports Used

Webapp frontend: 10820
Backend/MCP HTTP: 10821
Prometheus metrics: 9091
Monitoring stack: Prometheus 9090, Loki 3100, Grafana 3000 (all 127.0.0.1 only)

Fleet Standard Alignment

FastMCP 3.2+ required
Transport via src/tailscalemcp/transport.py (stdio/http/sse)
All ports in 10700+ range
structlog for structured logging (JSON, stderr)
Prometheus metrics on separate port

LM Link Integration (Tailscale + LM Studio)

LM Link is a Tailscale-powered encrypted mesh for remote LLM access (Feb 2026). The get_lm_link tool provides operational control over LM Link via the lms CLI:

Operation	CLI equivalent	Description
`status`	`lms link status --json`	Live peers, loaded models, link state
`enable`	`lms link enable`	Enable LM Link on this device
`disable`	`lms link disable`	Disable LM Link
`set_device_name`	`lms link set-device-name <name>`	Rename this device
`set_preferred_device`	`lms link set-preferred-device <device>`	Set preferred peer
`info`	(static)	Setup docs and links
`readiness`	(Tailscale API)	Tailnet connectivity check

Read the full file on GitHub · 63 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.

1mo ago First seen · 63 lines · 776 tokens per session scan C 8738dad72cda

Subscribe to this mod's changes

tailscale-mcp AGENTS.md is an instructions file published in the GitHub repository sandraschi/tailscale-mcp (5 stars, last pushed 2d ago), licensed MIT. It adds 776 tokens to every session, about $0.0031 per session on Opus 5.5. A static security scan graded it C with 2 findings (downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Planning Productivity Python fastmcp mcp tailscale vpn webapp

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).

microsoft/vscode · 9,715 tokens

tailscale-mcp: Instructions file for Codex