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 jeffreytse/grimoire-core --skill write-business-plangit clone --depth 1 https://github.com/jeffreytse/grimoire-coreWrote 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/jeffreytse/grimoire-core/write-business-plan)<a href="https://agentmods.dev/skills/jeffreytse/grimoire-core/write-business-plan"><img src="https://agentmods.dev/badge/skills/jeffreytse/grimoire-core/write-business-plan/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/jeffreytse/grimoire-core/write-business-plan"><img src="https://agentmods.dev/badge/skills/jeffreytse/grimoire-core/write-business-plan.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00028 | $0.00985 |
| Opus 5 | $0.00014 | $0.00492 |
| Sonnet 5 | $0.00006 | $0.00197 |
| Haiku 4.5 | $0.00003 | $0.00098 |
Grade A, and why
write-business-plan 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 6d 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 — 64 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Write Business Plan
Produce a structured business plan that communicates the opportunity, model, and execution path to investors or lenders.
Why This Is Best Practice
Adopted by: SBA-backed loan applicants, Y Combinator portfolio prep, MBA venture programs, traditional bank financing Impact: SBA data shows businesses with formal plans are 16% more likely to secure funding and 30% more likely to grow. Sahlman (HBR, 1997) demonstrated that investors screen on people, opportunity, context, and deal — a structured plan surfaces all four efficiently. Why best: A business plan forces founders to pressure-test assumptions before spending capital. The process of writing it surfaces gaps that internal conversations miss.
Sources: Sahlman "How to Write a Great Business Plan" HBR (1997); Osterwalder & Pigneur "Business Model Generation" (2010); SBA Business Plan Guide (2023)
Steps
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Write the executive summary last — 1–2 pages covering: problem, solution, market size, business model, traction, team, and ask. Write last because it distills everything else. Investors often read only this.
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Define the problem and customer — describe the specific pain point, who suffers from it, and how they currently cope. Quantify the pain where possible (cost, time lost, frequency).
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Articulate the solution — explain what you build, how it solves the problem, and your key differentiator. Avoid feature lists — focus on the customer outcome.
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Size the market (TAM/SAM/SOM) — use a bottoms-up calculation to size the serviceable obtainable market. Avoid top-down percentage claims ("capturing 1% of a $100B market").
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Describe the business model — explain how you make money: pricing, revenue streams, customer acquisition mechanism, and unit economics (CAC, LTV, payback period).
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Analyze the competitive landscape — map 5–10 direct and indirect competitors. Build a 2×2 or feature matrix. Articulate your defensible differentiation and moat.
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.
- 6d ago First seen · 64 lines · 28 tokens per session scan A e3446858adf8
write-business-plan is a skill published in the GitHub repository jeffreytse/grimoire-core (4 stars, last pushed 21d ago), licensed MIT. It adds 28 tokens to every session and 985 once invoked, about $0.0001 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 2026-09-03.
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