typescript-expert

The typescript-expert skill provides guidance on TypeScript development, including type-level programming, performance optimization, monorepo management, and migration strategies. It assists with project analysis, error resolution, and tool selection.

10.2K

Installs

Use cases

5/10

Quality

Is typescript-expert safe to install?

Review the source first

Review the source first: our audit of typescript-expert's source files found 18 shell commands, 12 external URLs, file reads and writes (high risk). Every command and URL listed appears verbatim in the skill's source. The skill executes shell commands, reads local files, and makes network requests to external resources.

How we audit skills: our security review methodology.

Who is this skill for?

Developers working on TypeScript or JavaScript projects who need assistance with complex type systems, build performance, or architectural migrations.

What can you do with it?

Diagnosing slow type checking and build performance
Implementing branded types and advanced conditional types
Migrating from JavaScript to TypeScript
Configuring monorepos with Nx or Turborepo
Resolving module resolution and circular dependency issues
Setting up type testing with Vitest

How good is this skill?

Quality score: 5/10. The skill provides clear, actionable instructions and specific command-line examples for common TypeScript tasks.

What does the skill file contain?

SKILL.md

# TypeScript Expert

You are an advanced TypeScript expert with deep, practical knowledge of type-level programming, performance optimization, and real-world problem solving based on current best practices.

### When invoked:

0. If the issue requires ultra-specific expertise, recommend switching and stop:
   - Deep webpack/vite/rollup bundler internals → typescript-build-expert
   - Complex ESM/CJS migration or circular dependency analysis → typescript-module-expert
   - Type performance profiling or compiler internals → typescript-type-expert

   Example to output:
   "This requires deep bun...

Frequently asked questions

When should I use a different expert skill?

Use a different skill if the issue involves deep bundler internals (typescript-build-expert), complex ESM/CJS migration (typescript-module-expert), or compiler internals (typescript-type-expert).

How does the skill detect project tooling?

It parses package.json dependencies and devDependencies, and checks for the presence of specific configuration files like pnpm-workspace.yaml, lerna.json, nx.json, or turbo.json.

What is the recommended approach for type testing?

The skill recommends using Vitest with expectTypeOf to verify types in .test-d.ts files.

Data sourced from sickn33/antigravity-awesome-skills on GitHub. Install counts from skills.sh. The summary and security audit are derived from the skill's source files: every command and URL listed appears verbatim in the source.

Install

Works with Claude Code, Cursor, Codex CLI, and 50+ agents.

Manual install paths per agent

Claude Code: .claude/skills/ or ~/.claude/skills/

Codex CLI: .codex/skills/ or ~/.codex/skills/

GitHub Copilot: .github/skills/ or ~/.copilot/skills/

Amp: .agents/skills/ or ~/.config/agents/skills/

Copy the skill folder (with SKILL.md) into the project or global directory.

Security audit

high risk

Commands

URLs

Yes

File I/O

The skill executes shell commands, reads local files, and makes network requests to external resources.

View commands and endpoints

$ npx tsc --version

$ node -v

$ node -e "const p=require('./package.json');console.log(Object.keys({...p.devDependencies,...p.dependencies}||{}).join('\n'))" 2>/dev/null | grep -E 'biome|eslint|prettier|vitest|jest|turborepo|nx' || echo "No tooling detected"

$ (test -f pnpm-workspace.yaml || test -f lerna.json || test -f nx.json || test -f turbo.json) && echo "Monorepo detected"

$ npm run -s typecheck || npx tsc --noEmit

$ npm test -s || npx vitest run --reporter=basic --no-watch

$ npm run -s build

$ npx tsc --extendedDiagnostics --incremental false | grep -E "Check time|Files:|Lines:|Nodes:"

https://egghead.io/blog/using-branded-types-in-typescript

https://github.com/microsoft/TypeScript/issues/47663

https://www.typescriptlang.org/docs/handbook/declaration-files/introduction.html

https://github.com/microsoft/TypeScript/wiki/Performance

https://github.com/microsoft/TypeScript/pull/48077

https://github.com/type-challenges/type-challenges

https://type-level-typescript.com

https://biomejs.dev

Sourcesickn33/antigravity-awesome-skills

Installs10.2K

Quality5/10

typescript javascript development tooling monorepo

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