tldraw-mcp-server AGENTS.md

tldraw-mcp-server AGENTS.md is an instructions file for Codex, OpenCode from Mihai-Codes/tldraw-mcp-server. It costs 3,719 tokens per session, scanned A, original, MIT.

Repository instructions for an MCP (Model Context Protocol) server that lets AI agents control a live tldraw infinite canvas. They explain the project structure, design choices, and available canvas tools.

In plain words
What is it for?
Use them when developing, debugging, or extending this tldraw MCP server, including its Express, WebSocket, React, and layout-engine code.
Why use it?
They give coding agents the project context needed to make consistent changes without rediscovering how the canvas server, MCP server, and frontend work together.

Instructions file for CodexOpenCode

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add instructions/mihai-codes/tldraw-mcp-server/agents-md
Clone the repo
git clone --depth 1 https://github.com/Mihai-Codes/tldraw-mcp-server

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.

agentmods badge for tldraw-mcp-server AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/mihai-codes/tldraw-mcp-server/agents-md.svg)](https://agentmods.dev/instructions/mihai-codes/tldraw-mcp-server/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/mihai-codes/tldraw-mcp-server/agents-md"><img src="https://agentmods.dev/badge/instructions/mihai-codes/tldraw-mcp-server/agents-md.svg" alt="Measured on agentmods" height="20"></a>
Per session 3,719 This file is loaded in full into every session.
When invoked 3,719 The same file — it is already loaded in full.
Security scan A 0 findings. Scan, not verified.
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.

ModelPer sessionOnce invoked
Fable 5 $0.03719 $0.03719
Opus 5 $0.01860 $0.01860
Sonnet 5 $0.00744 $0.00744
Haiku 4.5 $0.00372 $0.00372

Measured 5d ago against content hash 07e975e585d4, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

tldraw-mcp-server 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 5d 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.

AGENTS.md · 309 lines

How it starts

The opening of the file, as written. The whole thing — 309 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md — tldraw MCP Server

Guidance for AI agents (AdaL, Claude Code, Codex CLI, etc.) working in this repository.

What This Project Is

An MCP (Model Context Protocol) server that gives AI agents programmatic control over a live tldraw infinite canvas. Two processes run together:

  1. Canvas Server (src/canvas-server.ts) — Express HTTP + WebSocket server on port 3000. Owns the in-memory element store and broadcasts mutations to connected browsers.
  2. MCP Server (src/index.ts) — Stdio MCP server. Validates tool calls with Zod and proxies them to the canvas server via HTTP REST.
  3. Frontend (frontend/src/App.tsx) — React + tldraw app. Connects to canvas server via WebSocket, applies all mutations to the tldraw editor in real time.

Repository Layout

tldraw-mcp-server/
├── src/
│   ├── index.ts          # MCP server entry point — 27 tools, Zod schemas
│   ├── canvas-server.ts  # Express + WebSocket canvas server — REST CRUD + snapshot
│   ├── types.ts          # Shared types: CanvasElement, WSMessage, ApiResponse, generateId
│   ├── layout/
│   │   ├── engine.ts     # Main layout engine entry point
│   │   ├── dagre.ts      # Hierarchical layout using @dagrejs/dagre
│   │   ├── force.ts      # Force-directed layout using d3-force
│   │   ├── grid.ts       # Grid layout algorithm
│   │   ├── graph.ts      # Graph building helpers for layout algorithms
│   │   └── types.ts      # Layout types and interfaces
│   └── export/
│       ├── svg.ts        # SVG generation from elements
│       └── pdf.ts        # PDF export using Playwright or pdf-lib fallback
├── frontend/
│   ├── src/
│   │   ├── App.tsx       # React component — WS sync, tldraw shape mapping
│   │   └── main.tsx      # React entry point
│   ├── index.html
│   ├── vite.config.ts    # Dev proxy /api → :3000, build → dist/public
│   ├── tsconfig.json
│   └── package.json
├── dist/                 # Compiled backend (tsc output) — gitignored
│   └── public/           # Compiled frontend (vite build output) — gitignored
├── .mcp.json             # Project-level MCP config for AdaL CLI / Claude Code
├── package.json          # Root — backend deps + build scripts
└── tsconfig.json         # Backend TS config

Read the full file on GitHub · 309 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.

  1. 5d ago First seen · 309 lines · 3,719 tokens per session scan A 07e975e585d4

Subscribe to this mod's changes

tldraw-mcp-server AGENTS.md is an instructions file published in the GitHub repository Mihai-Codes/tldraw-mcp-server (1 stars, last pushed 3mo ago), licensed MIT. It adds 3,719 tokens to every session, about $0.0186 per session on Opus 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.