Thinking Crutch
Download for Mac

Thinking Crutch · Free · Runs on your Mac

Your chat is long. Your thinking shouldn't get lost in it.

Just talk with your agent. As you go, it puts the questions, ideas and reasons that matter on a canvas, so you can see how you got here. What counts is your call.

Download for MacWatch the demo
Thinking Crutch / canvas
Goal
Don't lose the thread
QuestionAnswered
Why is rereading so tiring?

Conclusion

A chat keeps the order of things, not what you now believe.

Read why
QuestionUnanswered
How do we pick up next time?

Tired of this?

Thinking Crutch keeps only what is worth keeping, and every decision can be traced back to why.

1 / 6

At first, you're the one giving directions.

On the Canvas, every option gets an outcome.

An Idea keeps its reasons; a Conclusion keeps its basis. Only what is still unresolved moves on to the next round.

Goal
Work through problems with AI without losing the thread
QuestionUnanswered
Why is rereading a chat so tiring every time I return?
Idea
Chats move forward in time, but the current judgment is buried behind us

Reasons · Support 1 · Challenge 1

Agent judgment: Leans for

Search brings back the words, not the why, so the challenge doesn't hold.

  • SupportI have to reread many messages to reconstruct why we thought this
  • ChallengeSearch finds the words, but not the reasoning behind the judgment
QuestionUnanswered
How can I pick up next time without rereading the chat from page one?

Let the conversation go. Keep the thinking.

What's worth keeping is already on the canvas. Next time, just start a new conversation and let your agent read it first. The old chat? Throw it away.

Download Thinking Crutch

Free. Your canvases stay on your computer.

  • Free
  • Stays on your Mac
  • Signed by Apple

macOS

Signed and notarized by Apple, so it opens with a double-click.

We're preparing the first signed build.

Windows

A Windows version is on its way.

Coming soon

Before you start

  • An agent that can connect to an MCP server, such as Claude Code or Codex.
  • macOS. Supported versions will be listed with the first release.

Get started

About five minutes from download to your first canvas.

  1. Install the app

    Download Thinking Crutch for Mac and open it. Keep it open while you work: your agent reads and writes the canvas through it.

  2. Connect your agent

    Send this to your agent. It adds the canvas to its own MCP configuration.

    Prompt
    Please add this MCP server to your own configuration: http://127.0.0.1:47821/mcp (HTTP transport, name: ai-canvas). When you're done, remind me to start a new session so you can use it.

    Or add it yourself. The address is http://127.0.0.1:47821/mcp

  3. Start a new session and ask

    Tell your agent what you want to think through. It writes the goal, questions and ideas onto the canvas as you talk.

    “Read my canvas and help me think about this goal.”

  4. Apply what counts

    Everything your agent writes waits on the canvas until you Apply it. Reject what doesn't belong.

Questions

What people ask before they try it.

Where are my canvases stored?

On your computer, as files. There is no account and nothing is uploaded.

Does it cost anything?

No. It's free.

Which agents work with it?

Any agent that can connect to an MCP server over HTTP. We use Claude Code and Codex every day.

Can the agent change my canvas on its own?

No. It proposes; nothing counts until you Apply it.

Is the connection safe?

The agent endpoint listens only on this machine (127.0.0.1). It has no sign-in yet, so other programs on your computer can reach it too.

Is there a Windows or Linux version?

Not yet. Mac comes first.

How do I reach you?

Write to us. Where you got stuck is the most useful thing to tell us.

Stuck? Tell us.

One line is enough. We read every email.