TypeScript Configuration Patterns

Quick Guide: Shared TypeScript strict config in packages/typescript-config/. Enable strict: true plus noUncheckedIndexedAccess, exactOptionalPropertyTypes, noImplicitOverride. Use modern module settings: module: "preserve", moduleResolution: "bundler", verbatimModuleSyntax: true, moduleDetection: "force". Use ${configDir} (TS 5.5+) for portable paths. Sync path aliases between tsconfig and your build tool.

<critical_requirements>

CRITICAL: Before Using This Skill

All code must follow project conventions in CLAUDE.md (kebab-case, named exports, import ordering, import type, named constants)

(You MUST enable TypeScript strict mode (strict: true) in ALL tsconfig.json files - non-negotiable)

(You MUST use verbatimModuleSyntax: true to enforce explicit import type - replaces deprecated importsNotUsedAsValues)

(You MUST use shared config pattern (packages/typescript-config/) in monorepos - never duplicate configs per package)

(You MUST sync path aliases between tsconfig.json and your build tool - mismatches cause import resolution failures)