📝 Sweep doc and formatter drift

README named --experimental-strip-types, which was renamed to
--strip-types. Document the current flag only.

The extension recommendations list is unchanged, but the VSCode section
undercounted it and now matches extensions.json. The per-language
formatter blocks in .vscode/settings.json stay (they keep a user's
local formatter settings from overriding the project's) and gain the
JSX/TSX language ids to match what oxfmt and the lefthook glob cover.

README.md

@@ -20,7 +20,7 @@ What each tier runs, when it fires and what it costs:
 ### Tooling
 
 - **TypeScript 7** — type checker and build (`tsc`).
-- **node --test** + `--experimental-strip-types` — test runner (Node 22.6+, flag dropped on Node 24).
+- **node --test** + `--strip-types` — test runner.
 - **c8** — code coverage for `test:ci`.
 - **oxlint** — Rust-based linter, with type-aware rules powered by **oxlint-tsgolint** (typescript-go).
 - **oxfmt** — Rust-based formatter (Prettier-compatible). Formats JS/TS, JSON/JSONC, YAML, Markdown, MDX, and more; built-in `package.json` key sorting replaces `sort-package-json`.
@@ -55,9 +55,9 @@ The choice and configuration of each tool above is the result of deliberate trad
 
 ## VSCode integration
 
-- Recommended extensions: see `.vscode/extensions.json` (oxc, cspell).
+- Recommended extensions: see `.vscode/extensions.json` (oxc, cspell, TypeScript native-preview, EditorConfig, todo-tasks).
 - TypeScript 7 is used via the `typescriptteam.native-preview` extension.
-- oxc extension provides oxlint squiggles and oxfmt format-on-save.
+- oxc extension provides oxlint squiggles and oxfmt format-on-save; `.vscode/settings.json` pins it per language so a user's local `[language]` formatter settings cannot override the project's choice.
 
 ## Contributing