docs(coding): files 1000 lines max, functions 200 lines max, no earlier split point

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

code-languages/js-typescript.md

@@ -139,9 +139,9 @@ Attach an `AbortController` to every long-lived `fetch` and abort it in cleanup.
 - **Imports**: prefer the configured alias (`@/…`) over relative climbs.
 - Indentation and quote/semicolon style: **match the file you are editing**. Do not introduce
   a new formatter or lint config into a project that already has one.
-- **One file until it earns a split** — around 250 lines for a self-contained plugin/feature,
-  or when a second file is genuinely reusable (`utils.ts`, `types.ts`, `components/`).
-  Hard limits from the general rules still apply: ESLint's `max-lines` and
+- **One file until it earns a split** — when it nears the 1000-line limit, or when a second
+  file is genuinely reusable (`utils.ts`, `types.ts`, `components/`).
+  The limits from the general rules (1000 lines per file, 200 per function) apply: ESLint's `max-lines` and
   `max-lines-per-function` cover both natively, so prefer those over a separate test here.
 
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