Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add kazdenc/builder-skills --skill lean-canvasgit clone --depth 1 https://github.com/kazdenc/builder-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/kazdenc/builder-skills/lean-canvas)<a href="https://agentmods.dev/skills/kazdenc/builder-skills/lean-canvas"><img src="https://agentmods.dev/badge/skills/kazdenc/builder-skills/lean-canvas.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00082 | $0.03052 |
| Opus 5 | $0.00041 | $0.01526 |
| Sonnet 5 | $0.00016 | $0.00610 |
| Haiku 4.5 | $0.00008 | $0.00305 |
Grade A, and why
lean-canvas scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 228 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Lean Canvas
When someone asks you to think through a business model, product strategy, or idea validation, use the lean canvas. Fill one page, not a slide deck. The constraint is the point — it forces clarity.
A lean canvas is a snapshot of a business model hypothesis. Every box is a bet. Treat it that way: state the bet, then figure out how to test it.
The Canvas Layout
┌───────────────┬───────────────┬───────────────┬───────────────┬───────────────┐
│ │ │ │ │ │
│ PROBLEM │ SOLUTION │ UNIQUE │ UNFAIR │ CUSTOMER │
│ │ │ VALUE │ ADVANTAGE │ SEGMENTS │
│ Top 3 │ Top 3 │ PROPOSITION │ │ │
│ problems │ features │ │ Can't be │ Target │
│ │ │ Single, │ easily │ customers │
│ │ │ clear, │ copied or │ │
│ │ │ compelling │ bought │ Early │
│ │ │ message │ │ adopters │
│ │ │ │ │ │
├───────────────┴───────┬───────┴───────────────┴───────┬───────┴───────────────┤
│ │ │ │
│ KEY METRICS │ CHANNELS │ REVENUE STREAMS │
│ │ │ │
│ Key activities │ Path to │ Revenue model │
│ you measure │ customers │ Pricing │
│ │ │ │
├───────────────────────┴───────────────────────────────┴───────────────────────┤
│ │ │
│ COST STRUCTURE │ REVENUE STREAMS │
│ │ │
│ Fixed and variable costs │ (continued from above) │
│ │ │
└───────────────────────────────┴───────────────────────────────────────────────┘
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 8d ago First seen · 228 lines · 82 tokens per session scan A 59f5e390f378
lean-canvas is a skill published in the GitHub repository kazdenc/builder-skills (45 stars, last pushed 6mo ago), licensed MIT. It adds 82 tokens to every session and 3,052 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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