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CodeNomad/AGENTS.md
2026-02-11 10:55:57 +00:00

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# AGENT NOTES
## Styling Guidelines
- Reuse the existing token & utility layers before introducing new CSS variables or custom properties. Extend `src/styles/tokens.css` / `src/styles/utilities.css` if a shared pattern is needed.
- Keep aggregate entry files (e.g., `src/styles/controls.css`, `messaging.css`, `panels.css`) lean—they should only `@import` feature-specific subfiles located inside `src/styles/{components|messaging|panels}`.
- When adding new component styles, place them beside their peers in the scoped subdirectory (e.g., `src/styles/messaging/new-part.css`) and import them from the corresponding aggregator file.
- Prefer smaller, focused style files (≈150 lines or less) over large monoliths. Split by component or feature area if a file grows beyond that size.
- Co-locate reusable UI patterns (buttons, selectors, dropdowns, etc.) under `src/styles/components/` and avoid redefining the same utility classes elsewhere.
- Document any new styling conventions or directory additions in this file so future changes remain consistent.
## Coding Principles
- Favor KISS by keeping modules narrowly scoped and limiting public APIs to what callers actually need.
- Uphold DRY: share helpers via dedicated modules before copy/pasting logic across stores, components, or scripts.
- Enforce single responsibility; split large files when concerns diverge (state, actions, API, events, etc.).
- Prefer composable primitives (signals, hooks, utilities) over deep inheritance or implicit global state.
- When adding platform integrations (SSE, IPC, SDK), isolate them in thin adapters that surface typed events/actions.
## Multi-Language Support (i18n)
The UI uses a small custom i18n layer (no ICU/messageformat). When building features, never hardcode user-visible strings.
- **Runtime API:** use `useI18n()` in components (`const { t } = useI18n();`) and `tGlobal(...)` in stores/non-component code.
- Implementation: `packages/ui/src/lib/i18n/index.tsx`
- **Where messages live:** `packages/ui/src/lib/i18n/messages/<locale>/` as TypeScript objects (`"flat.dot.keys": "string"`).
- Each locale has an `index.ts` that merges message parts; duplicate keys throw at build time.
- Merge helper: `packages/ui/src/lib/i18n/messages/merge.ts`
- **Adding a new string:** add it to the appropriate `.../messages/en/*.ts` part file, then add the same key to each other locales corresponding file.
- Missing translations fall back to English (and finally to the key), so gaps can be easy to miss.
- **Interpolation:** placeholders are simple `{name}` replacements (word characters only). Avoid placeholders like `{file-name}`.
- **Pluralization:** handle manually via separate keys like `something.one` / `something.other` and choose in code.
- **Adding a new language:** add a new `messages/<locale>/` folder + `index.ts`, register it in `packages/ui/src/lib/i18n/index.tsx`, and add it to the language picker in `packages/ui/src/components/folder-selection-view.tsx`.
- **Locale persistence:** the selected locale is stored in app preferences (`locale`) and persisted via the server config (default `~/.config/codenomad/config.json`).
- **Avoid English-only paths:** do not import `enMessages` directly in feature code; always go through `t(...)` so locale changes apply.
## File Length Guidelines (Highlight Only)
We track file size as a refactoring signal. When you touch or create files, highlight oversized files so the team can plan refactors when time permits.
- Source files: warn after ~500 lines; target limit ~800 lines
- Test files: highlight after ~1000 lines
Behavior for agents:
- Do not refactor solely to satisfy these thresholds.
- When a change touches a file that exceeds the warning/limit, mention it in your final response and include the file path and approximate line count.
- When creating new files, aim to stay under the thresholds unless there's a clear reason.
## Tooling Preferences
- Use the `edit` tool for modifying existing files; prefer it over other editing methods.
- Use the `write` tool only when creating new files from scratch.