chopsticks/CONTRIBUTING.md

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# Contributing
## Rules
1. **No Node.js in the Vim runtime.** Plugins must work with pure VimScript — no coc.nvim or other Node-backed completion engines. External CLIs (prettier, eslint, markdownlint, stylelint, tsc) installed via npm are fine; ALE shells out to them as optional system tools, not as part of the Vim runtime.
2. **Startup matters.** Run `vim -u .vimrc -i NONE --startuptime /tmp/s.log -es -N -c qa!` before and after. If your change adds >1ms, it needs a good reason.
3. **Works on TTY.** Test over SSH. If it breaks in a terminal without true color, fix it or gate it behind `g:is_tty`.
4. **Native-first keymaps.** Enhance Vim's native behavior instead of replacing it. Do not override built-in motions, operators, text objects, or help-oriented keys for discoverability alone. Rare exceptions, such as the default Space-layout `s` jump, must have a documented native replacement, cheat-sheet coverage, and a classic-layout fallback.
5. **One module, one concern.** Don't put git config in lsp.vim.
## Adding a plugin
1. Add the `Plug` line to `modules/plugins.vim`
2. If it's not needed at startup, lazy-load it: `Plug 'foo/bar', { 'on': 'FooCommand' }`
3. Put config in the appropriate module
4. Check new mappings against native Vim behavior before adding them
5. Update the cheat sheet definitions in `modules/cheatsheet.vim` if you add keybindings
6. Run `scripts/test.sh vim` locally after installing plugins
7. Test on both macOS and Linux when changing terminal or package-manager behavior
## Local tests
```bash
scripts/test.sh --help
scripts/test.sh quick
scripts/test.sh vim
```
`scripts/test.sh quick` runs shell, docs, installer, and bootstrap checks without requiring Vim plugins.
`scripts/test.sh vim` expects plugins to be installed under `~/.vim/plugged`.
Use `STARTUP_LIMIT_MS=150 scripts/test.sh vim` to match CI's startup threshold.
## Reporting bugs
Open an issue. Include:
- OS and Vim version
- Whether you're on SSH/TTY
- Steps to reproduce
## Code style
- Named augroups with `autocmd!`
- No comments explaining _what_ — only _why_
- `exists('g:plugs["..."]')` guards for plugin-dependent config
- Test with `scripts/test.sh vim`