before-you-build
Pre-build product and feature risk review for founders, product managers, and AI-assisted builders. Use this skill when the user is about to build a landing page, MVP, SaaS product, internal tool, agent workflow, or major feature and needs to check demand, positioning, monetization, retention, trust, distribution, and adoption risk before implementation starts.
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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/wshobson/agents --skill before-you-build- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads before-you-build automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
Before You Build
Run a compact pre-mortem before implementation. The goal is not to block building; it is to identify the highest-risk assumption, the smallest validation step, and the build scope that should be delayed until evidence improves.
When To Use
Use this skill when a user asks to build or ship:
- A new product, MVP, prototype, landing page, SaaS app, marketplace, content site, agent workflow, or internal tool
- A major feature with unclear adoption, revenue, retention, trust, or distribution impact
- A public launch asset where weak positioning could waste development or promotion effort
Skip this skill when the task is a narrow implementation fix, refactor, test repair, dependency update, or already-validated change with clear acceptance criteria.
Risk Checklist
Review the idea across these risks:
- Demand: Is there evidence that a specific buyer or user urgently wants this?
- Positioning: Can the target user understand what it is and why it matters in one sentence?
- Monetization: Is there a credible path to payment, budget, or strategic value?
- Retention: Is there a reason users would return after the first try?
- Trust: Does the product require credibility, data access, integrations, or behavior change that users may resist?
- Distribution: Is there a repeatable way to reach the target user?
- Feature adoption: For feature work, will the feature change user behavior or just add surface area?
If the verdict is not obvious, use references/risk-checklist.md for deeper questions.
Output Format
Keep the response short and decision-oriented:
- Risk verdict: Low, medium, or high risk, with one sentence explaining why.
- Main assumption: The single assumption most likely to break the project.
- Evidence to find first: The smallest useful signal before building more.
- Do next: One concrete validation step or reduced build scope.
- Delay: What not to build yet.
Guidance
- Be direct about weak evidence, but avoid dismissing the user's idea.
- Prefer smaller validation steps over large research plans.
- Separate product risk from engineering difficulty.
- If the idea is already validated, say what evidence makes it lower risk and suggest the smallest implementation slice.
- If facts are missing, name the missing evidence instead of inventing market claims.
FAQ
What does the before-you-build skill do?
Pre-build product and feature risk review for founders, product managers, and AI-assisted builders. Use this skill when the user is about to build a landing page, MVP, SaaS product, internal tool, agent workflow, or major feature and needs to check demand, positioning, monetization, retention, trust, distribution, and adoption risk before implementation starts.
How do I install before-you-build?
Run npx skills add https://github.com/wshobson/agents --skill before-you-build in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/before-you-build/ (personal) or .claude/skills/before-you-build/ (project).
Which AI agents can use before-you-build?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is before-you-build safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains before-you-build?
It is published by wshobson in wshobson/agents. It has 3,203 recorded installs.
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