File Is Not Included In | Any Tsconfig.json

# Instead of: project/tool.ts # Move to: project/src/tool.ts mv tool.ts src/ Common include patterns: "include": [ "src/**/*.ts", // All TS files in src "src/**/*.tsx", // React TSX files "test/**/*.spec.ts", // Test files "config/*.ts" // Root config files ]

"extends": "./tsconfig.base.json", "include": ["src/**/*"] file is not included in any tsconfig.json

Move the problematic file into an already-included directory: # Instead of: project/tool

For monorepos with multiple projects: