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 guia-matthieu/clawfu-skills --skill product-discoverygit clone --depth 1 https://github.com/guia-matthieu/clawfu-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/guia-matthieu/clawfu-skills/product-discovery)<a href="https://agentmods.dev/skills/guia-matthieu/clawfu-skills/product-discovery"><img src="https://agentmods.dev/badge/skills/guia-matthieu/clawfu-skills/product-discovery/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/guia-matthieu/clawfu-skills/product-discovery"><img src="https://agentmods.dev/badge/skills/guia-matthieu/clawfu-skills/product-discovery.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 | $0.00087 | $0.05478 |
| Opus 5 | $0.00044 | $0.02739 |
| Sonnet 5 | $0.00017 | $0.01096 |
| Haiku 4.5 | $0.00009 | $0.00548 |
Grade A, and why
product-discovery 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 9d 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 — 896 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Product Discovery
Build products customers actually want. Apply Marty Cagan's Silicon Valley-tested framework to discover solutions that are valuable, usable, feasible, and viable.
When to Use This Skill
- New product development when validating what to build
- Feature prioritization to ensure you're solving real problems
- Pivot decisions when current direction isn't working
- Team alignment on what problems to solve
- Risk reduction before committing development resources
- Continuous discovery to maintain product-market fit
Methodology Foundation
| Aspect | Details |
|---|---|
| Source | Marty Cagan - Inspired (2008, 2018) and Empowered (2020) |
| Core Principle | "Fall in love with the problem, not the solution. The best product teams discover what customers need, not just what they ask for." |
| Why This Matters | Most products fail not because they're built poorly, but because they solve the wrong problem. Discovery ensures you build the right thing before you build the thing right. |
What Claude Does vs What You Decide
| Claude Does | You Decide |
|---|---|
| Structures content frameworks | Final messaging |
| Suggests persuasion techniques | Brand voice |
| Creates draft variations | Version selection |
| Identifies optimization opportunities | Publication timing |
| Analyzes competitor approaches | Strategic direction |
What This Skill Does
- Frames the four risks - Value, usability, feasibility, viability
- Distinguishes discovery from delivery - Different mindsets, different processes
- Teaches opportunity assessment - Which problems to solve
- Develops prototyping skills - Test ideas before building
- Guides customer research - Learn what customers need (not want)
- Structures continuous discovery - Ongoing learning, not one-time research
How to Use
Assess a Product Opportunity
I'm considering building [feature/product].
Apply product discovery principles to assess this opportunity.
Context: [target customer, current state, hypothesis]
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.
- 9d ago First seen · 896 lines · 87 tokens per session scan A dfb8a26cf20f
product-discovery is a skill published in the GitHub repository guia-matthieu/clawfu-skills (149 stars, last pushed 5mo ago), licensed MIT. It adds 87 tokens to every session and 5,478 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 2026-09-03.
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