Add Before You Build skill (#173)

Accepted as a concrete, source-backed OpenClaw resource update.

README.md

@@ -1277,6 +1277,7 @@ Created by OpenClaw agent "Clawd Clawderberg" (built by Matt Schlicht, Cofounder
 | **OpenClaw Codex App Server** | Plugin that brings Codex App Server workflows to Telegram and Discord through OpenClaw | [GitHub](https://github.com/pwrdrvr/openclaw-codex-app-server) |
 | **Northstar** | OpenClaw and ClawHub skill for daily business briefings from Stripe, Shopify, Lemon Squeezy, and Gumroad metrics | [GitHub](https://github.com/Daveglaser0823/northstar-skill) |
 | **Product Manager Skills** | Markdown-first PM skill pack that can be loaded by OpenClaw and other local-file AI tools for PRD review, SaaS metrics, discovery, and roadmap work | [GitHub](https://github.com/Digidai/product-manager-skills) |
+| **Before You Build Skill** | Pre-build product risk review skill for checking demand, positioning, monetization, retention, trust, distribution, and feature-adoption risk before implementation | [ClawHub](https://clawhub.ai/bin1874/before-you-build) \| [GitHub](https://github.com/bin1874/before-you-build-skill) |
 | **TweetClaw** | X/Twitter plugin for OpenClaw using Xquik. Treat write, follow, and DM actions as opt-in and review platform policy before enabling automation. | [GitHub](https://github.com/Xquik-dev/tweetclaw) \| [npm](https://www.npmjs.com/package/@xquik/tweetclaw) |
 | **ToolRouter** | Tool gateway that exposes external tools to AI assistants through MCP-style workflows. Verify OpenClaw compatibility and requested permissions before use. | [Website](https://toolrouter.com) |
 | **OpenClaw Medical Skills** | Biomedical and clinical skill library for OpenClaw and NanoClaw, organized as installable `SKILL.md` modules | [GitHub](https://github.com/FreedomIntelligence/OpenClaw-Medical-Skills) |