LABSCO SUMMARY
React Doctor checks React code for problems and scores it out of 100. These 4 skills teach your coding assistant to use it: check its own changes, plan fixes, tune 3D scenes and measure a slow click or keystroke.
The react-doctor skill has your assistant run the check after it changes React code and fix anything that lowered the score before committing. improve-react audits a whole codebase and writes ranked fix plans without editing code; improve-threejs audits and fixes Three.js 3D scenes; performance records one slow interaction in Chrome and runs only when you type /performance.
All four need Node.js 20.19 or newer (22.13 or newer on Node 22) and no account. React Doctor sends crash reports and anonymous usage counts unless you add --no-telemetry. Its licence is a modified MIT licence: training or testing AI models on it, or selling it as a hosted service, needs written permission from Million Software.
WHAT'S INSIDE
Surveys a whole React codebase like a senior engineer, uses React Doctor's scan as evidence, and ranks the findings by how much each fix matters to the people using the app. It then writes a step-by-step plan for each fix you pick, precise enough for another agent or a cheaper model to carry out; it does not edit your code itself. React Doctor sends crash reports and anonymous usage counts unless you add --no-telemetry.
Audits and fixes Three.js and React Three Fiber scenes, ranking problems by how often the code runs, so anything inside the per-frame loop comes first. It adds checks React Doctor's scan misses, such as graphics memory that is never freed, and a visual check of the rendered scene for flicker, wrong colours, shadow glitches and blurry resizing. React Doctor sends crash reports and anonymous usage counts unless you add --no-telemetry.
Measures one slow interaction in your React app instead of guessing: React Doctor records it in a separate Chrome window while you click through it, and the skill ties the slow moments to the components that rendered. It reports a verdict, the measurements and the smallest fix, and changes code only if you ask. It runs only when you type /performance. React Doctor sends crash reports and anonymous usage counts unless you add --no-telemetry.
Has your assistant run React Doctor after it changes React code: a scan of state, speed, accessibility, security and structure that scores the project out of 100, so the assistant fixes anything it made worse before committing. Typing /doctor runs a full clean-up that edits your files but never commits. React Doctor sends crash reports and anonymous usage counts unless you add --no-telemetry. React Doctor also has its own installer for this skill, npx react-doctor@latest install, which asks which coding assistant to add it to.
INSTALL
SINGLE SKILL
Run this outside your AI tool, using Node.js 22.20.0 or newer. Skills CLI 1.7.2 skips skill selection; prompts cancel installation without an interactive terminal. If choosing Project when asked about installation scope, open your project's folder before running this.
Install checklist
Additional agents. ↑/↓ moves, Space toggles selections, Enter confirms.Installing to: for your intended tool. Stop if it names a different tool.Symlink (Recommended) for shared files or Copy to all agents for separate copies; review the summary before confirming installation.Install the find-skills skill? defaults to Yes, adding another skill for all projects. Choose No if you don't want that extra installation.Find the skill name in the Skills tab and put it in the command before running it. Each entry there installs independently.
npx skills add millionco/react-doctor --skill <YOUR_SKILL_NAME> --full-depth