Summary
This is a comprehensive reference for writing TypeScript the right way. It pushes type safety over convenience (unknown instead of any, explicit return types, readonly by default), includes a Result type pattern for error handling, and comes with Deno scripts to analyze code quality and generate types from JSON. The quick reference table is genuinely useful when you're in the middle of code and need to remember whether to use a type guard or an assertion. It won't teach you TypeScript from scratch, but if you're already writing it and want to stop cutting corners, this codifies the discipline.
Install to Claude Code
npx -y skills add jwynia/agent-skills --skill typescript-best-practices --agent claude-codeInstalls into .claude/skills of the current project.
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one prompt install →Files
SKILL.md
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Plug Mailtrap into your AI workflow and let it handle the email.
Connect Mailtrap MCP →Agent, run crypto. Access onchain data & trade routes via 1inch.
Install now →Make coding agent sessions - Searchable, Shareable, Vendor-neutral & Scored.
Try For Free →Your agent targets a perfect 10 Code Health score. Deterministic. Every commit.
Try For Free →Integrate web data into your AI product. One API to scrape website & brand data.
Get API Key Now →belt cli automatically finds the best tools and skills for your agent. image, video, music, tts...
one prompt install →First SeenJun 3, 2026
