TypeScript Type Check Skill

Overview

This skill validates TypeScript code by running tsc --noEmit and parsing errors into structured, actionable reports organized by file. It is a read-only validation step (does not modify code) that implements a linear workflow: locate config → execute compiler → parse output → present results.

Use this skill when validating TypeScript code before commits, after refactors, or checking for type regressions. Do not use for linting, test execution, runtime errors, or projects without tsconfig.json.

Instructions

Step 1: Verify TypeScript Project

Locate tsconfig.json in the project. This step is mandatory—never skip it. tsc without a tsconfig.json falls back to default settings, missing project-specific configuration like paths, strict mode, and compiler targets.

ls tsconfig.json 2>/dev/null || ls */tsconfig.json 2>/dev/null