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Produces a one-page lean canvas across nine interlocking blocks (problem, customer, UVP, solution, channels, revenue, cost, metrics, unfair advantage) with optional inline HTML and SVG visual rendering.
Passed 19 of 22 test cases with the skill, and 7 of 22 without it.
and 17 more in the full report
14 fixed5 passed either way1 still failing2 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 14 test cases the skill fixed. Same model, same prompt, with and without the skill.
I am launching a B2B SaaS platform targeting independent auto repair shops to automate customer appointment scheduling and parts inventory ordering. Could you build a strategic business thesis markdown canvas for this idea? Make sure to cover the 9 core business blocks in markdown, tag each block with a confidence level and short rationale, and add an Evidence & Confidence section at the bottom covering validated data, assumptions, open questions, and governance.
| Checked | Without skill | With skill |
|---|---|---|
| Explicitly states that content mode is used as the default fallback when mode is omitted. | Missed | Passed |
| Includes Problem, Solution, Key Metrics, and Unfair Advantage as canonical blocks instead of Osterwalder Business Model Canvas blocks like Key Partners or Key Resources. | Missed | Passed |
| Includes an Existing Alternatives subsection within the Problem block. | Missed | Passed |
The instructions your model reads when the skill loads.
A lean canvas is a one-page business thesis that makes your assumptions about problem, customer, solution, and viability explicit and testable. Developed by Ash Maurya from Alex Osterwalder's Business Model Canvas, it is specifically adapted for startups and product teams operating under uncertainty. Nine interlocking blocks force you to articulate the whole picture at once so that changing one block's assumptions surfaces the ripple effect on the others.
This skill is a strategic hub, not a specialist tool. It produces the integrated one-page artifact and cross-links to deeper PM skills (define-problem-statement, foundation-persona, define-jtbd-canvas, develop-solution-brief, discover-competitive-analysis, measure-experiment-design) for single-block depth when needed.
content (default) produces the nine-block canvas as structured markdown.visual produces the markdown canvas AND writes a self-contained, attractive .html file to disk using references/html-template.html as the layout scaffold. The HTML renders the canonical Maurya nine-block layout with polished typography, subtle per-column color accents, confidence badges per block, and print-ready A3 landscape styling. No external assets or CDN dependencies: the file opens correctly in a browser with no network access.If mode is omitted, default to content and state that fallback explicitly.
measure-experiment-design to prioritize which block assumptions to test firstfoundation-persona, define-problem-statement, discover-competitive-analysis) instead.deliver-prd, deliver-user-stories, deliver-acceptance-criteria; lean canvas is strategy, not specification.define-problem-statement or define-jtbd-canvas and return to lean canvas once the problem is framed.define-hypothesis, then measure-experiment-design; lean canvas frames the full thesis, a hypothesis tests one claim within it.When asked to create a lean canvas, follow these steps:
Resolve mode and intent
Determine whether the request is content or visual. If mode is omitted, default to content and state the fallback.
Clarify the target: new product thesis, existing-business stress test, or side-by-side comparison of options. If unclear, ask once before proceeding.
Collect context and evidence
test cases passed, vs 7 / 22 without
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