chore(deps): adopt TypeScript 7; keep Stryker off the TS JS API

.github/workflows/ci.yml

@@ -34,7 +34,7 @@ jobs:
 
       # Build before typecheck and test:
       #   - test/demo-invariants.test.ts imports from `../demo/src/...`;
-      #     tsgo follows the import and pulls those demo files in, which
+      #     tsc follows the import and pulls those demo files in, which
       #     in turn require `unitforge` (the root package) to resolve via
       #     dist/. Without dist/ first, typecheck reports demo errors.
       #   - test/subpathExports.test.ts verifies the package.json `exports`
@@ -51,7 +51,7 @@ jobs:
         working-directory: ./demo
         run: bun install --no-frozen-lockfile
 
-      - name: Typecheck (tsgo)
+      - name: Typecheck (tsc)
         run: bun run typecheck
 
       - name: Package hygiene (publint + attw)

demo/package.json

@@ -34,7 +34,7 @@
     "eslint-plugin-react-compiler": "19.1.0-rc.2",
     "eslint-plugin-react-hooks": "^5",
     "tailwindcss": "^4.3.2",
-    "typescript": "^5.6.3",
+    "typescript": "^6.0.3",
     "vite": "^8.1.4"
   }
 }

demo/tsconfig.json

@@ -13,7 +13,6 @@
     "isolatedModules": true,
     "noUncheckedIndexedAccess": true,
     "exactOptionalPropertyTypes": true,
-    "baseUrl": ".",
     "paths": {
       "~/*": ["./src/*"]
     }

package.json

@@ -73,8 +73,8 @@
   ],
   "scripts": {
     "clean": "rm -rf dist",
-    "build": "bun run clean && tsgo",
-    "typecheck": "tsgo --noEmit && tsgo --noEmit --project tsconfig.test.json",
+    "build": "bun run clean && tsc",
+    "typecheck": "tsc --noEmit && tsc --noEmit --project tsconfig.test.json",
     "typecheck:demo": "cd demo && bunx tsc --noEmit",
     "lint": "biome check",
     "lint:fix": "biome check --write",
@@ -96,11 +96,11 @@
     "@semantic-release/npm": "^13.1.5",
     "@stryker-mutator/core": "^9.6.1",
     "@types/bun": "^1.3.14",
-    "@typescript/native-preview": "7.0.0-dev.20260707.2",
     "fast-check": "^4.9.0",
     "knip": "^6.26.0",
     "publint": "^0.3.21",
-    "semantic-release": "^25.0.5"
+    "semantic-release": "^25.0.5",
+    "typescript": "^7.0.2"
   },
   "publishConfig": {
     "access": "public"

stryker.config.json

@@ -21,5 +21,6 @@
   "timeoutMS": 60000,
   "concurrency": 4,
   "incremental": true,
-  "incrementalFile": ".stryker-tmp/incremental.json"
+  "incrementalFile": ".stryker-tmp/incremental.json",
+  "ignorePatterns": ["tsconfig.json", "tsconfig.test.json"]
 }