node_modules/@anthropic-ai/sdk/src/tsconfig.json

{
  // this config is included in the published src directory to prevent TS errors
  // from appearing when users go to source, and VSCode opens the source .ts file
  // via declaration maps
  "include": ["index.ts"],
  "compilerOptions": {
    "target": "es2015",
    "lib": ["DOM"],
    "moduleResolution": "node"
  }
}