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 kornpng/web-mvp-blueprint-kit --skill mvp-idea-briefgit clone --depth 1 https://github.com/kornpng/web-mvp-blueprint-kitWrote 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/kornpng/web-mvp-blueprint-kit/mvp-idea-brief)<a href="https://agentmods.dev/skills/kornpng/web-mvp-blueprint-kit/mvp-idea-brief"><img src="https://agentmods.dev/badge/skills/kornpng/web-mvp-blueprint-kit/mvp-idea-brief/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/kornpng/web-mvp-blueprint-kit/mvp-idea-brief"><img src="https://agentmods.dev/badge/skills/kornpng/web-mvp-blueprint-kit/mvp-idea-brief.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 | $0.00057 | $0.00315 |
| Opus 5.5 | $0.00023 | $0.00126 |
| Sonnet 5.5 | $0.00011 | $0.00063 |
| Haiku 4.5 | $0.00006 | $0.00032 |
Grade A, and why
mvp-idea-brief 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 1mo 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.
What it actually says
MVP Idea Brief
Turn a rough idea into docs/IdeaBrief-[AppName].md.
Process
Ask one question at a time:
- What is the idea in one sentence?
- Who is the first target user?
- What painful situation does this user face today?
- What do they do now without this product?
- What is the smallest useful outcome the product should deliver?
- Should the first version be Web, mobile, desktop, or undecided?
- What must be excluded from the first version?
- What is the user's technical level and budget?
Verification
Before writing, echo the product idea, target user, pain, workaround, smallest useful outcome, platform, exclusions, and constraints. Wait for confirmation.
Output
Write docs/IdeaBrief-[AppName].md with:
- One-sentence product
- First target user
- Problem and current workaround
- Smallest useful outcome
- MVP boundary
- First platform recommendation
- Open questions
- Next step: evidence research
Quality Bar
- Make vague ideas concrete.
- Narrow broad audiences to a first user.
- Do not add features beyond the user's stated goal.
- Make exclusions explicit.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 1mo ago First seen · 46 lines · 57 tokens per session scan A 0194b15f7180
mvp-idea-brief is a skill published in the GitHub repository kornpng/web-mvp-blueprint-kit (23 stars, last pushed 4mo ago), licensed MIT. It adds 57 tokens to every session and 315 once invoked, about $0.0002 per session on Opus 5.5. 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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