## Description

Describe what this PR changes and why. Include user-facing behavior changes, new browser tools, or documentation updates.

## Related Issue

Closes #

## Type of Change

- [ ] Bug fix
- [ ] New feature
- [ ] Documentation update
- [ ] Refactor or maintenance
- [ ] Release or packaging change
- [ ] Other:

## Testing

Describe how you tested the change. Include local pi install steps or browser workflows when relevant.

## Checklist

- [ ] I ran `npm run typecheck`.
- [ ] I ran `npm pack --dry-run` or otherwise verified packaging when package contents changed.
- [ ] I tested locally with `pi install /path/to/pi-browser-harness` when runtime behavior changed.
- [ ] I updated README documentation for user-facing changes.
- [ ] I updated CHANGELOG.md for user-facing changes.
- [ ] I kept the change focused and avoided unrelated rewrites.