# Stack Detector

> Scan the current project's tech stack (package.json, config files, lockfiles) and recommend the most relevant skills and rules from this collection for the detected technologies.

- Skill: `drvoss/stack-detector` (Agent Skill)
- Install (CLI): `npx skillmds@latest add drvoss/stack-detector`
- Raw SKILL.md: https://api.skillmd.com/api/skills/drvoss/stack-detector/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: drvoss (https://skillmd.com/u/drvoss)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/drvoss/stack-detector

---


# Stack Detector

## Why This is Copilot-Exclusive

This skill is specific to the **everything-copilot-cli collection**: the recommendation table
maps detected technologies to skill and rule file paths that only exist in this repository.
Other AI agents can also inspect file systems, but this skill's value is the curated mapping
to this specific collection's skills and rules — not the file-scanning mechanics itself.

## When to Use

- At the start of a session on an unfamiliar codebase, before or alongside `context-prime`
- When you want focused recommendations for which skills and rules apply to this project
  (`context-prime` loads broad context; `stack-detector` targets specific recommendations)
- When onboarding a new contributor and recommending which skills to study
- When auditing a project to suggest missing tooling or practices

## Workflow

### 1. Detect Runtime & Package Manager

```powershell
# Check for Node.js project
if (Test-Path "package.json") {
    $pkg = Get-Content "package.json" | ConvertFrom-Json
    Write-Host "Node.js project detected"
    Write-Host "Name: $($pkg.name)"
}

# Detect package manager from lockfile
$lockfiles = @{
    "pnpm-lock.yaml"    = "pnpm"
    "yarn.lock"         = "yarn"
    "package-lock.json" = "npm"
    "bun.lockb"         = "bun"
}
foreach ($file in $lockfiles.Keys) {
    if (Test-Path $file) { Write-Host "Package manager: $($lockfiles[$file])"; break }
}

# Python
if ((Test-Path "pyproject.toml") -or (Test-Path "requirements.txt")) {
    Write-Host "Python project detected"
}

# Go
if (Test-Path "go.mod") { Write-Host "Go project detected" }

# Java / Kotlin
if ((Test-Path "build.gradle") -or (Test-Path "pom.xml")) {
    Write-Host "JVM project detected"
}
```

### 2. Detect Frameworks & Libraries

```powershell
if (Test-Path "package.json") {
    $pkg = Get-Content "package.json" | ConvertFrom-Json
    $deps = @()
    if ($pkg.dependencies)    { $deps += $pkg.dependencies.PSObject.Properties.Name }
    if ($pkg.devDependencies) { $deps += $pkg.devDependencies.PSObject.Properties.Name }

    $frontendMap = @{
        "next"     = "Next.js"
        "react"    = "React"
        "vue"      = "Vue"
        "nuxt"     = "Nuxt"
        "@angular" = "Angular"
        "svelte"   = "Svelte"
        "astro"    = "Astro"
    }
    foreach ($key in $frontendMap.Keys) {
        if ($deps -match $key) { Write-Host "Framework: $($frontendMap[$key])" }
    }

    $backendMap = @{
        "express"  = "Express"
        "@nestjs"  = "NestJS"
        "hono"     = "Hono"
        "fastify"  = "Fastify"
    }
    foreach ($key in $backendMap.Keys) {
        if ($deps -match $key) { Write-Host "Backend: $($backendMap[$key])" }
    }

    $dbMap = @{
        "prisma"    = "Prisma"
        "drizzle"   = "Drizzle ORM"
        "@supabase" = "Supabase"
        "typeorm"   = "TypeORM"
    }
    foreach ($key in $dbMap.Keys) {
        if ($deps -match $key) { Write-Host "Database/ORM: $($dbMap[$key])" }
    }

    $testingMap = @{
        "vitest"     = "Vitest"
        "playwright" = "Playwright"
        "jest"       = "Jest"
        "cypress"    = "Cypress"
    }
    foreach ($key in $testingMap.Keys) {
        if ($deps -match $key) { Write-Host "Testing: $($testingMap[$key])" }
    }

    $cloudMap = @{
        "wrangler"  = "Cloudflare Workers"
        "vercel"    = "Vercel"
        "@aws-sdk"  = "AWS SDK"
    }
    foreach ($key in $cloudMap.Keys) {
        if ($deps -match $key) { Write-Host "Cloud: $($cloudMap[$key])" }
    }
}
```

### 3. Detect Config Files

```powershell
$configMap = @{
    "next.config.*"       = "Next.js"
    "vite.config.*"       = "Vite"
    "tailwind.config.*"   = "Tailwind CSS"
    "vitest.config.*"     = "Vitest"
    "playwright.config.*" = "Playwright"
    "wrangler.toml"       = "Cloudflare Workers"
    "vercel.json"         = "Vercel"
    "astro.config.*"      = "Astro"
    "drizzle.config.*"    = "Drizzle ORM"
    "tsconfig.json"       = "TypeScript"
}

foreach ($pattern in $configMap.Keys) {
    if (Get-ChildItem -Filter $pattern -ErrorAction SilentlyContinue) {
        Write-Host "Config detected: $($configMap[$pattern])"
    }
}
```

### 4. Recommend Skills & Rules

Based on the detected stack, recommend the following from this repository:

| Detected Technology  | Recommended Skills                       | Recommended Rules                                                   |
|----------------------|------------------------------------------|---------------------------------------------------------------------|
| TypeScript           | `tdd-workflow`, `code-review`            | `rules/languages/typescript.md`                                     |
| Next.js              | `commit-workflow`, `release`             | `rules/frameworks/nextjs.md`                                        |
| React                | `code-review`, `refactor-clean`          | `rules/frameworks/react.md`                                         |
| Prisma / Drizzle     | `evaluate-repository`                    | `rules/frameworks/prisma.md`                                        |
| Playwright           | `test-coverage`, `e2e-testing`           | `rules/frameworks/playwright.md`                                    |
| Vitest               | `tdd-workflow`, `eval-harness`           | `rules/frameworks/vitest.md`                                        |
| NestJS / Express     | `security-scan`                          | `rules/frameworks/nestjs.md`                                        |
| Cloudflare Workers   | `cost-audit`                             | `rules/frameworks/cloudflare-workers.md`                            |
| Python               | `security-scan`, `evaluate-repository`  | `rules/languages/python.md`                                         |
| Go                   | `security-scan`                          | `rules/languages/golang.md`                                         |
| Java / JVM           | `security-scan`, `evaluate-repository`  | `rules/languages/java.md`                                           |
| Any project          | `security-scan`                          | `rules/common/supply-chain-security.md`                             |
| Next.js + Prisma     | `nextjs-prisma`                          | `rules/frameworks/nextjs.md`, `rules/frameworks/prisma.md`          |
| React + Vitest       | `react-vitest`                           | `rules/frameworks/react.md`, `rules/frameworks/vitest.md`           |
| NestJS + Prisma      | `nestjs-prisma`                          | `rules/frameworks/nestjs.md`, `rules/frameworks/prisma.md`          |

> **Note**: See `README.md` for the current full list of available skills and rules.

### 5. Output Summary

```powershell
Write-Host ""
Write-Host "=== Stack Detection Complete ==="
Write-Host "Recommended skills for this project:"
Write-Host "  /context-prime      -- load live project context"
Write-Host "  /commit-workflow    -- if Git workflow needed"
Write-Host "  /security-scan      -- if security audit needed"
Write-Host "(Add detected framework-specific skills as available)"
```

## Notes

- This skill reads files only — it makes no changes to the project
- Combine with `context-prime` for a complete session initialization
- The recommendation table above is updated as new framework-specific rules and combo skills
  are added in later phases of this repository's roadmap