chore: migrate to TypeScript 7

AGENTS.md

@@ -79,7 +79,7 @@ Keep `src/daemon.ts` a thin router and `src/daemon/request-router.ts` orchestrat
 - Lint/format stack is OXC:
   - config: `.oxlintrc.json`, `.oxfmtrc.json`
 - TypeScript is strict enough to surface dead code early: `strict`, `isolatedModules`, `noUnusedLocals`, and `noUnusedParameters` are enabled.
-- The repo emits with `tsdown` (Rolldown) and typechecks with `tsgo` (native preview); the `typescript` package is not a dependency, so there is no `tsc` to fall back to. If declaration generation fails, inspect `tsconfig.lib.json` first.
+- The repo emits with `tsdown` (Rolldown) and typechecks with TypeScript 7 via `tsc`; `typescript` is a direct dev dependency. Declaration generation is configured to use the TypeScript 7 native executable; if declaration generation fails, inspect `tsconfig.lib.json` and `tsdown.config.ts` first.
 - Dev-loop staleness has three layers; after editing runtime or runner code: `pnpm build` (dist), restart the daemon (it does not self-reload), and remember `shutdown` deliberately HANDS OFF a healthy simulator runner — the adopted runner keeps serving the old Swift binary until you kill its process or the source fingerprint changes. Verifying "my change did nothing" against an adopted runner is a classic false negative.
 - `tsconfig.lib.json` needs an explicit `rootDir: "./src"` for declaration layout.
 - Use the aggregate scripts in `package.json` when possible; they encode the expected validation bundles better than ad hoc command lists.

package.json

@@ -119,7 +119,7 @@
     "check:unit": "pnpm test:unit && pnpm test:smoke",
     "check": "pnpm check:tooling && pnpm check:fallow && pnpm check:unit",
     "prepack": "pnpm check:mcp-metadata && pnpm build:all && pnpm package:apple-runner:npm && pnpm package:android-snapshot-helper:npm && pnpm package:android-multitouch-helper:npm",
-    "typecheck": "tsgo -p tsconfig.json",
+    "typecheck": "tsc -p tsconfig.json",
     "test-app:install": "pnpm install --dir examples/test-app --ignore-workspace",
     "test-app:start": "pnpm --dir examples/test-app start",
     "test-app:ios": "pnpm --dir examples/test-app ios",
@@ -214,14 +214,14 @@
   },
   "devDependencies": {
     "@types/node": "^22.19.21",
-    "@typescript/native-preview": "7.0.0-dev.20260613.1",
+    "typescript": "^7.0.2",
     "@vitest/coverage-v8": "4.1.8",
     "fallow": "^2.95.0",
     "oxc-parser": "^0.138.0",
     "oxfmt": "^0.42.0",
     "oxlint": "^1.69.0",
     "skillgym": "^0.9.1",
-    "tsdown": "^0.22.3",
+    "tsdown": "^0.22.4",
     "vite": "^8.0.16",
     "vitest": "^4.1.8"
   }