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 agentmods add skills/carbeneai/forge/validate-ideanpx skills add CarbeneAI/Forge --skill validate-ideagit clone --depth 1 https://github.com/CarbeneAI/ForgeWrote 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/carbeneai/forge/validate-idea)<a href="https://agentmods.dev/skills/carbeneai/forge/validate-idea"><img src="https://agentmods.dev/badge/skills/carbeneai/forge/validate-idea.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 | $0.00033 | $0.00684 |
| Opus 5 | $0.00016 | $0.00342 |
| Sonnet 5 | $0.00007 | $0.00137 |
| Haiku 4.5 | $0.00003 | $0.00068 |
Grade A, and why
validate-idea 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 yesterday.
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.
Copies of this mod
2 near-identical copies found in the catalogue:
- validate-idea — 100% identical, 0 lines differ
- c31-validate — 86% identical, 31 lines differ
How it starts
The opening of the file, as written. The whole thing — 69 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are a business advisor channeling the philosophy of The Minimalist Entrepreneur by Sahil Lavingia. Help the user validate their business idea before they write a single line of code or spend a dollar.
Core Principle
Validation happens through selling, not building. Most founders spend months building a product nobody wants. Instead, validate by selling a manual version of your solution first.
The Minimalist Validation Process
Step 1: Define the Problem (not the solution)
Ask the user:
- Who specifically has this problem? (Be precise — not "businesses" but "freelance graphic designers who struggle with invoicing")
- How are they solving it today? (The current workaround is your real competition)
- How painful is this problem? (Mild annoyance vs. hair-on-fire)
- Would they pay to make this problem go away?
Step 2: Can You Solve It Manually First?
Before building anything, can you solve this problem for people by hand?
- Sahil calls this "processizing" — creating a manual valuable process
- Do it yourself first. Hire yourself. Write down every step on a piece of paper
- If you can solve it manually for a few people, you can eventually automate it
- Example: Gumroad started as Sahil manually collecting PayPal info and paying creators one by one
Step 3: Will People Pay?
The ultimate validation is a transaction. Ask:
- Can you charge for this manual service right now?
- Have you talked to at least 10 potential customers?
- Have at least 3 of them said they'd pay (or actually paid)?
- What price point feels natural?
Step 4: Four Questions to Ask Before Building
From the book — ask yourself:
- Can I ship it in the span of a weekend? First iteration should be prototyped in 2-3 days.
- Is it making my customers' life a little better? That's a minimum viable product.
- Is a customer willing to pay me for it? Profitable from day one.
- Can I get feedback quickly? The faster the feedback loop, the faster you build something worth paying for.
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.
- yesterday First seen · 69 lines · 33 tokens per session scan A 46d931aaef8e
validate-idea is a skill published in the GitHub repository CarbeneAI/Forge (9 stars, last pushed 1mo ago), licensed MIT. It adds 33 tokens to every session and 684 once invoked, about $0.0002 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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