The brief becomes the build.
You write the intent; the agent builds it where everyone can see. Instead of a spec that gets misread and a mockup that gets debated, your team reviews a running screen next to the brief that asked for it. When it is time to tell the story, the deck comes off the same canvas.
Stop being misread
The brief lives on the canvas as stickies and notes, right next to what the agent built from it. Interpretation gaps show up in minutes, not at sprint review.
Review artifacts, not status updates
Decks, dashboards, and working screens appear on the surface as they are made. You look at the thing itself.
User-test the day the idea exists
A prototype you can put in front of users is minutes from the brief. What you learn is real because the prototype runs.
Decide from evidence
Three variants cost one sentence. Compare running takes side by side and keep the one users choose, instead of debating mockups in a meeting.
The deck comes off the same surface
Stakeholder updates are presentations built from the actual work. Slide three links to the running screen it describes.
The translation tax
A PM’s core problem is that intent travels badly. You write the spec with care. A designer reads it and draws their version of it. An engineer reads the drawing and builds their version of that. By sprint review, three people have each translated the idea once, and the thing on screen matches none of the documents. So you write clarifying comments, book alignment meetings, and update the spec to describe what got built instead of what you meant.
The waste is not any one handoff. It is that the feature exists as three artifacts, a document, a mockup, and a ticket, and none of them run. Everyone debates descriptions of the thing because nobody can touch the thing.
Put the brief where the build happens
In Prototyper the brief is not a document that points at future work. It sits on the canvas as stickies and notes, and an agent builds from it right there. Twenty minutes after you write “a dashboard that shows churn by cohort, filters by plan”, a running dashboard sits next to those words. If the agent misread you, you see it immediately and fix the brief, not the sprint.
Debates change shape when the options run. Where you would have argued over two static mocks, you ask for both versions and put them side by side. People click them, and the meeting ends with a decision because the evidence was clickable. When users need to weigh in, you send a link the same day the idea existed.
Stakeholder updates come off the same surface. The deck is built next to the running screens it describes, so slide three can link to the live thing instead of pasting a screenshot that will be stale next week.
What you keep, what you drop
Keep your roadmap tool, your tracker, and your rituals. Prototyper does not want to be your backlog. It replaces the middle of the process, the part where an idea waits weeks to become something a person can react to. Teams link a canvas workspace from the ticket and keep planning where it already lives.
You never write code. The agent you connect, Claude Code, Codex, Cursor, or Copilot, builds on the subscription you already have. What you bring is the quality of the brief and the sharpness of your reaction to what comes back.
Where you will spend your time
Briefs, variants, decks, and running screens arranged spatially, one link for all of it.
AgentsBring your own agent and hand it the brief. It builds where the team can watch.
Live previewPrototypes run with real input and real states, so user tests measure the actual flow.
CollaborationStakeholders join as free viewers and leave feedback as stickies on the work.
When Prototyper is not your tool yet
It will not replace your tracker, your analytics, or your roadmap, and it is not trying to. Features that lean on heavy backend work, real payment rails, complex permissions, live production data, still need engineering to carry them the last stretch.
What you get is the front of that pipeline: an idea becomes a running, testable screen in minutes instead of sprints, and engineering starts from working code plus the evidence you gathered with it.
Frequently asked questions
- Do I need to write code?
- No. You bring the brief and the judgment; agents do the construction. PMs who read code can open any file, but the workflow never requires it.
- Does this replace my roadmap and spec tools?
- Keep them. Prototyper is where the idea becomes something you can test and show. Many teams link canvas workspaces from their tickets and keep planning where it already lives.
- How do stakeholders review work?
- Share a link. Viewers are free and see the live canvas: the brief, the variants, and the running screens. Feedback lands as stickies next to the work.
- How does this fit with my engineering team?
- The prototype is real React, so engineering inherits working code and a record of what was tested, not a picture to reinterpret. Most teams treat the validated prototype as the starting branch of the build.
- Which agents can I use?
- Claude Code, Codex, Cursor, or Copilot, connected over MCP. You bring your own agent on the subscription you already pay for; there is no separate metered bill from us.
See it with your own work.
Free to start, no credit card. Bring the agent you already have.