localization-paraglide

name	localization-paraglide
description	Use when adding, reviewing, or fixing localized UI copy in agentsview's Svelte frontend with Paraglide JS. Trigger for frontend/messages/*.json edits, generated m.* message usage, locale-aware number/date/relative-time formatting, pluralization, language switching, or hard-coded user-facing English in frontend/src.

Localization Paraglide

Workflow

1. Read frontend/project.inlang/settings.json, frontend/src/lib/i18n/index.ts, and nearby localized components before editing.

2. Put user-facing copy in frontend/messages/en.json and frontend/messages/zh-CN.json with identical keys.

3. Import app localization through frontend/src/lib/i18n/index.ts:

   import { m } from "../../i18n/index.js";
   

4. Call generated Paraglide messages as functions, for example m.nav_sessions() or m.shared_active_filters_remove_agent({ agent }).

5. Use Paraglide message declarations for plural, number, datetime, and relative time when the formatted value is part of translatable copy.

6. Use formatDateTime() from frontend/src/lib/i18n/index.ts for standalone visible date/time labels that need the active Paraglide locale.

7. Keep technical identifiers untranslated: agent names, model names, file paths, CLI commands, IDs, and raw API values.

8. Run npm run i18n:compile and npm run check from frontend/ after message or component changes.

Message Rules

• Keep key names scoped and descriptive, such as settings_terminal_title or activity_concurrency_empty.
• Do not concatenate translated sentence fragments. Prefer one complete message with parameters.
• Pass numbers as numbers to pluralized messages. Pass strings only for display fragments that have already been intentionally formatted.
• In Svelte, put arrays or objects containing translated labels in $derived or $derived.by when they must update after locale changes.
• Do not import from frontend/src/lib/paraglide/* directly in components unless changing the i18n wrapper itself.

Formatting

Read references/paraglide-formatting.md when adding pluralization, ordinal rules, date/time formatting, relative dates, compact numbers, currencies, or mixed selector messages.