tsconfig.base.json

{
  "compilerOptions": {
    "rootDir": "src",
    "target": "ES2020",
    "lib": ["ES2020"],
    "composite": true,
    "esModuleInterop": true,
    "allowJs": true,
    "sourceMap": true,
    "jsx": "react",
    // TypeScript 7 removed "node"/"node10"; "bundler" is its closest analogue
    // (extensionless relative imports, plus package.json "exports" support).
    // Every consumer of these packages is a bundler or CJS Node, both of which
    // resolve the same way. Pairing it with "module": "commonjs" only became
    // legal in TypeScript 6.
    "moduleResolution": "bundler",
    "declaration": true,
    "declarationMap": true,
    "removeComments": true,
    "isolatedModules": true,
    "forceConsistentCasingInFileNames": true,
    "noImplicitReturns": true,
    "noImplicitThis": true,
    "noImplicitAny": true,
    "skipLibCheck": true,
    "strict": true,
    "strictNullChecks": true,
    "noUnusedLocals": true,
    // "baseUrl" was removed in TypeScript 7. Without it, "paths" targets resolve
    // relative to the config file that declares them -- this one, at the repo
    // root -- so "./src/*" reproduces the old baseUrl:"." + "src/*" mapping.
    // These must stay relative: TS7 rejects bare non-relative targets (TS5090).
    "paths": {
      "@simlin/*": [
        "./src/*"
      ]
    }
  }
}