LOCAL AI CANVAS · AGENT-DRIVABLE
A Lean Canvas with a real local AI coach. Your idea stays on your laptop.
Nine boxes. One page. Three offline agents that interrogate the canvas. And every AI tool you already use can read it.
Onboarding, Critic, and Explorer agents run in your browser or on your Ollama daemon. The DOM contract and .leancanvas file format are published — agents like Claude, Codex, or Cursor can read and operate your canvas without anyone else seeing it.
For founders pairing with AI — without handing over the idea.
リーンキャンバスが 9 つのボックスで成すこと。
リーンキャンバスは 1 ページのビジネスモデルです — 課題、解決策、独自の価値提案、チャネル、顧客セグメント、不公平な優位性、主要指標、コスト構造、収益源。30 ページの事業計画書を、創業者が「アイデアが機能するか」を判断するために本当に答えるべき 9 つの質問に置き換えます。
Totally Lean はあなたのブラウザの中でキャンバスを動かします。アカウントなし。サーバーなし。データはローカルストレージに残ります。3 つのローカル AI エージェントが記入を手伝い、90 秒の音声ピッチジェネレーターがキャンバスを「初対面の人に手渡せるもの」に変換します。
「始める」をクリックすると、数秒で編集を開始 — サインアップなし、メールなし、チームワークスペースなし。誰かを巻き込みたいときは URL で共有。コピーが欲しいときは JSON でエクスポート。
創業者が同じキャンバスを別の角度から捉える方法。
同じ 9 つのボックスを、異なる瞬間に向けて切り取った形。今のあなたに合うものを選んでください。
Frequently asked
- Can Claude, Codex, or Cursor operate this canvas for me?
- Yes. Totally Lean publishes an operating manual for AI agents at /agent.txt — a public document describing the canvas data model, stable DOM selectors, keyboard shortcuts, and rules agents should follow. Any browser-driving agent (Claude for Chrome, Codex Chrome extension, Operator-class tools) can read the manual and operate the canvas through documented affordances. The agent talks to your browser, not to us — your canvas never reaches a server. The .leancanvas JSON file format gives agents a structured read/write channel as well.
- What do the three local AI agents do? Why three?
- Three different conversations help at different stages of writing a canvas. Onboarding interviews you when the canvas is blank. Critic challenges what you've written — weak Problem statements, vague Customer Segments, hand-wavy Unfair Advantages. Explorer brainstorms adjacencies you haven't considered. Each holds a structured written conversation about the canvas; none overwrites it directly. All three run on your machine — WebGPU in your browser or your own Ollama daemon.
- Is the AI really local? Where does the model actually run?
- Two paths. (1) WebGPU — model weights download once and cache in your browser; inference runs on your GPU. (2) Ollama — your own daemon running locally; the browser talks to it via localhost. Neither sends canvas content to any server we operate. The default behavior is fully offline.
- Can I read or write the .leancanvas file with my own tools?
- Yes. The format is documented at /file-format with a JSON Schema (Draft 2020-12). Open it in a text editor, parse it with any JSON library, edit it programmatically — versioned, stable, agent-friendly. The format is the same shape the editor uses internally; no proprietary lock-in layer between what you see and what gets exported. If Totally Lean disappears, your canvases stay readable forever.
A Lean Canvas with a real local AI coach. Your idea stays on your laptop.
サインアップなし、サーバーなし、メールなし。エディタを開いて、スケッチを始めましょう。