Tech Stack Detection Skill

Automatically detects project technology stack from configuration files for existing projects.

⚠️ For Existing Projects Only

This skill scans project files to detect what's already installed. For new projects where you need to choose a tech stack, use the stack-advisor skill instead.

When to Use

Scenario	Use This Skill?
Existing project with code	✅ Yes - detect installed stack
New project, user knows stack	❌ No - user provides to /speckit.plan
New project, user unsure	❌ No - use stack-advisor Q&A

Detection Patterns

Node.js / TypeScript

File	Indicates
package.json	Node.js project
tsconfig.json	TypeScript
package-lock.json	npm
yarn.lock	Yarn
pnpm-lock.yaml	pnpm
bun.lockb	Bun

Testing Frameworks

File	Framework
playwright.config.ts	Playwright
playwright.config.js	Playwright
jest.config.js	Jest
jest.config.ts	Jest
vitest.config.ts	Vitest
cypress.config.js	Cypress

Build Tools / Frameworks

File	Framework
vite.config.ts	Vite
next.config.js	Next.js
nuxt.config.ts	Nuxt
astro.config.mjs	Astro
svelte.config.js	SvelteKit
angular.json	Angular
webpack.config.js	Webpack

Python

File	Indicates
pyproject.toml	Modern Python
setup.py	Python package
requirements.txt	pip dependencies
Pipfile	pipenv
poetry.lock	Poetry
pytest.ini	pytest

Other Languages

File	Language/Framework
Cargo.toml	Rust
go.mod	Go
Gemfile	Ruby
composer.json	PHP
pom.xml	Java Maven
build.gradle	Java Gradle

Quick Detection Commands

# Bash - Run detection script
./.github/skills/tech-stack-detection/scripts/detect-stack.sh

# PowerShell - Run detection script
.\.github\skills\tech-stack-detection\scripts\detect-stack.ps1

Output Format

Scripts output JSON:

{
  "language": "typescript",
  "runtime": "node",
  "package_manager": "npm",
  "frameworks": ["next.js", "react"],
  "testing": ["playwright", "jest"],
  "build_tools": ["webpack"],
  "detected_files": [
    "package.json",
    "tsconfig.json",
    "playwright.config.ts"
  ]
}

Skill Creation Based on Stack

After detection, create appropriate skills:

# For React + TypeScript project
python .github/skills/skill-creator/scripts/init_skill.py react-patterns --path .github/skills

# For Next.js project
python .github/skills/skill-creator/scripts/init_skill.py nextjs-patterns --path .github/skills

Resources

• scripts/detect-stack.sh - Stack detection (Bash)
• scripts/detect-stack.ps1 - Stack detection (PowerShell)