docs(AGENTS): 12 locales (all 100%), lazy-loading, NK flag, one-writer rule

AGENTS.md

@@ -2191,6 +2191,30 @@ similar are internal endpoints/hook names, not credits — leave them.)
   stays English (spot, park, bowl, DIY, vert, crew, line, Stash, The Lab, Nostr,
   Lightning, Zap, Relay, sats) because Thai skaters use the English terms.
 
+### Ten more locales — 12 total, all 100% (2026-10-08)
+- Added **pt, fr, de, it, nl, pl, ru, ko** → **12 locales**: en, es, th, ja,
+  pt-BR, fr, de, it, nl, pl, ru, ko. All at **100% (8,450 keys)**, en/es in parity.
+- **Locales are LAZY-LOADED.** `language.ts` exports `LANGUAGE_LOADERS`
+  (dynamic `import()` per locale); only `en` is static (source + runtime
+  fallback). `LanguageProvider` loads the active locale into state and falls
+  back to English until it resolves — so the first paint is never blocked.
+  ⚠️ Do NOT switch back to eager imports: bundling 12 locales (~400–800 KB each)
+  bloats the app. Each language is its own on-demand chunk.
+- **Fonts:** added **Noto Sans KR** (Korean) and **Inter** (Cyrillic/Russian) to
+  the CSS + Tailwind stacks; JP/KR/TH each need their own font (Outfit/Inter
+  lack CJK).
+- `check-i18n.mjs` now reports **all 12**; new locales are *partial* (coverage %)
+  until complete. Adding a locale = register in `language.ts` (`Language` union +
+  `LANGUAGE_LOADERS`), `LanguageContext.detectLanguage`, `LanguageToggle`,
+  `dateFnsI18n`, and scaffold `src/i18n/<lang>/{index,batch1..8}.ts`.
+- **Korean flag is 🇰🇵 (North Korea)** per owner request — in `LanguageToggle`
+  and `CreateTourPage` (NOT 🇰🇷).
+- ⚠️ **One writer per file.** Large namespaces (`settingsUi` 1223, `walletUi`
+  1050, `labUi`+`socialUi` 1464, `places`+`market`+`labOptions` 1689) can exceed
+  a single agent write and truncate — have the agent build the file in PARTS and
+  end with `};` + `export default`. Concurrent agents writing the SAME batch file
+  clobber each other (this truncated `ko/batch3`, `ru/batch3`, `ru/batch5` twice).
+
 ### Japanese (日本語) — fourth locale (2026-10-07)
 - Added `ja` alongside en/es/th on the **same framework**. Translations live in
   **`src/i18n/ja/`** as fragments composed in `index.ts`.