typescript-performance-best-practices

TypeScript performance optimization guidelines for build times, type-checking, declaration emit, and editor responsiveness. This skill should be used when writing, reviewing, or optimizing TypeScript code and tsconfig settings. Triggers on tasks involving slow builds, slow type-checking, CI timeouts, editor lag, tsserver memory issues, monorepo configuration, project references, incremental builds, declaration emit, isolatedDeclarations, --noCheck flag, TypeScript 5.6+ features, TypeScript 7 migration, or any TypeScript performance investigation.