Copilot-Skills: Instructions file for GitHub Copilot

Ink - Auto-Loaded Instructions

Auto-loads for: **/*.js, **/*.jsx, **/*.ts, **/*.tsx (CLI-related files)

Default Behaviors

When working with Ink CLI projects, this skill provides:

• Quick component reference
• Hook patterns for state and input handling
• Layout and styling guidance
• Testing strategies

Common Patterns

Building an Interactive Menu

When creating selection interfaces:

const [selected, setSelected] = useState(0);

useInput((input, key) => {
  if (key.upArrow) setSelected(Math.max(0, selected - 1));
  if (key.downArrow) setSelected(Math.min(items.length - 1, selected + 1));
});

return items.map((item, i) => (
  <Text key={i} color={i === selected ? 'cyan' : 'white'}>
    {i === selected ? '> ' : '  '}{item}
  </Text>
));

Creating Responsive Layouts

Use measureElement to adapt to terminal size:

const ref = useRef();
const [width, setWidth] = useState(0);

useEffect(() => {
  const { width: measuredWidth } = measureElement(ref.current);
  setWidth(measuredWidth);
}, []);

return <Box ref={ref} width="100%">{/* content */}</Box>;

Rendering Progress/Loading

For long-running operations:

const [progress, setProgress] = useState(0);

useEffect(() => {
  const timer = setInterval(() => {
    setProgress(p => (p < 100 ? p + 1 : p));
  }, 100);
  return () => clearInterval(timer);
}, []);

return (
  <Box>
    <Text>Progress: </Text>
    <Text color="green">{'█'.repeat(progress / 5)}</Text>
  </Box>
);

Quality Guidelines

Code Style

• Use functional components with hooks
• Keep components focused and reusable
• Proper TypeScript types for CLI apps
• Handle keyboard input gracefully

Accessibility

• Support screen readers (enable with INK_SCREEN_READER=true)
• Provide keyboard navigation
• Clear visual feedback for selections
• Support common key bindings

Performance

• Avoid excessive re-renders (use React DevTools)
• Use <Static> for completed output
• Limit maxFps for heavy components
• Memoize callback functions