RES
RES is a skill that turns a SaaS product into a build kit for rebuilding it, using a browser study, for teams planning a clone or competitor.
What it is good for
- Documenting how a web product works to plan a rebuild
- Mapping screens, business rules and data models of a SaaS tool
- Listing integrations and approvals needed before launching a clone
- Studying a competitor's product without touching its live data
At a glance
- Who it is for
- Setup
- Install a desktop app or browser extension
Level 3 of 5. Download and install it like any other app or extension.
- Cost
- Free and open source
- Type
- Skill or plugin
- Tasks
- Works with
- Claude Code, Claude in Chrome, Playwright MCP, Chrome DevTools MCP, Codex
Momentum
- Rank this week
- Not ranked yet
- Best rank
- None yet
- GitHub stars
- 249
GitHub numbers as of Nov 2, 2026. Updated weekly.
Official links
Setup steps are on the official pages. We do not repeat them here, since they change.
Questions
- Is RES free?
- Yes. It is free and open source (MIT license).
- Do I need to know how to code to use RES?
- No. Download and install it like any other app or extension.
- What does RES work with?
- According to its own documentation, it works with Claude Code, Claude in Chrome, Playwright MCP, Chrome DevTools MCP, and Codex.
- What is RES good for?
- Documenting how a web product works to plan a rebuild, mapping screens, business rules and data models of a SaaS tool, listing integrations and approvals needed before launching a clone, and studying a competitor's product without touching its live data.
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