Typescript

This is a compilation-focused performance guide with 45 rules split across type system optimization, compiler config, and async patterns. It's most useful when you're dealing with slow tsc builds or need to configure tsconfig.json properly. The categorization by priority (type system and compiler settings marked CRITICAL, async and modules HIGH) makes it easy to know what actually matters. What stands out is the specificity: exact impact metrics like "30-50% faster declaration emit" for explicit return types or "50-90% faster rebuilds" for incremental compilation. If you're hunting down why your TypeScript build is slow or trying to prevent common footguns like barrel imports or deeply nested generics, this gives you concrete rules with measurable outcomes rather than vague best practices.

skills.sh installs: 1.8K
GitHub stars: 222
last updated: Aug 21, 2026

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Install

$ npx -y skills add pproenca/dot-skills --skill typescript --agent claude-code

Installs into .claude/skills of the current project.

Files

TypeScript Best Practices

Comprehensive performance optimization guide for TypeScript applications. Contains 45 rules across 8 categories, prioritized by impact to guide automated refactoring and code generation.

When to Apply

Reference these guidelines when:

Configuring tsconfig.json for a new or existing project
Writing complex type definitions or generics
Optimizing async/await patterns and data fetching
Organizing modules and managing imports
Reviewing code for compilation or runtime performance

Rule Categories by Priority

Priority	Category	Impact	Prefix
1	Type System Performance	CRITICAL	`type-`
2	Compiler Configuration	CRITICAL	`tscfg-`
3	Async Patterns	HIGH	`async-`
4	Module Organization	HIGH	`module-`
5	Type Safety Patterns	MEDIUM-HIGH	`safety-`
6	Memory Management	MEDIUM	`mem-`
7	Runtime Optimization	LOW-MEDIUM	`runtime-`
8	Advanced Patterns	LOW	`advanced-`