Sketchbefore you build.
Turn your spec into a sketch your whole team and agents can align around.
Why we're building Sketch
The bottleneck was never building.
It was always shared understanding. Propane fixes that.
We're launching Sketch because shipping fast without shared understanding just means building the wrong thing faster. It is the next step in Propane's mission to collapse the entire product workflow, from insight to specification to alignment to production, into one connected loop.
Write the spec in Canvas. Generate the sketch. Share with your team or drop it into your coding agent. Everyone builds from the same context.
Built for alignment, not production.
01
Generated from your spec,
not from scratch
Sketches pull from the Canvas you've already written. Customer data, insights, market context, the why behind the what. No blank canvas. No setup. No re-explaining what you meant.
02
Built for feedback,
not approval.
Lo-fi by design. Nobody asks why it isn't finished. They just tell you if the idea makes sense. The roughness is intentional. It invites reaction instead of reverence.
03
Align your team before
you commit.
Share a Sketch before the design brief, before the sprint, before the meeting. Catch the disagreement before it costs two weeks. Everyone sees the same thing and reacts to the same idea.
04
Iterate with humans and
agents.
Generate multiple versions. Share with a stakeholder, a designer, an engineer. Run it by your coding agent. Unlimited sketches, no design skills needed, no blockers.
05
Hand off to agents with
full context.
Drop a Sketch into Lovable, Cursor, or v0 alongside your full Propane spec. The agent gets the visual and the product reasoning behind it. Less interpretation. Fewer wrong builds. Better product.
Because a sketch is worth a thousand prompts.
Don't make your agent guess. Sketch gives Cursor, Lovable, etc. your flows and the spec — so they build on understanding, not assumptions.
Build with confidence
Your team aligned. Your agents briefed. The moment what you wrote becomes shared understanding — and shared understanding becomes better product.
Frequently Answered Questions
A lo-fi visual generator built into Propane. You write the spec, it generates something your team and agents can align around. No drawing, no design skills, no blank canvas.
Because what you wrote is invisible until someone builds the wrong thing. Sketch makes your thinking visible before anyone touches Figma or writes code.
An agentic product workspace that collapses the PM stack into one loop — customer insights, spec, alignment, handoff to coding agents. Sketch is one layer of that. If you are jumping between Notion, Dovetail, and ChatGPT today, Propane is what replaces that.
The step where you either draw a wireframe from scratch in Balsamiq, paste a description into Magic Patterns, or skip the visual entirely and hope your team understood the doc. That step is now instant.
Claude is general. Sketch is specific. It generates a lo-fi visual directly from your Canvas spec, attaches the full product context, and gives you a shareable link — all in one step. You are not prompting from scratch. You are rendering thinking you already did.
No. Balsamiq and Figma start from a blank canvas. Sketch starts from your spec. Lo-fi by design, so the conversation stays on the idea, not the pixels.
No. Sketch is what happens before Figma makes sense. Once the team has aligned on direction, take it to Figma or hand it straight to a coding agent.
Yes. Drop a Sketch into your coding agent alongside the Propane spec. The agent gets the visual and the product reasoning behind it. Better context, fewer wrong builds.
Your data stays yours. We are SOC 2 Type II certified, everything is encrypted at rest, and credentials are locked down with restricted access.
Every Sketch gets a shareable link. Anyone can view it — no Propane account needed. Feedback folds back into the Canvas so the spec stays current.
No. Write the spec in Canvas, hit generate. That is it.
Sketch is in alpha and included in Propane early access. Sign up or book a call to get in.