Context Detection

node "${CLAUDE_PLUGIN_ROOT}/skills/context-detection/scripts/discover-skills.js" "$(pwd)"

{
  "pluginSettings": {
    "dev": {
      "stack": ["react-typescript", "golang"],
      "features": {
        "testing": "vitest",
        "api": "rest"
      }
    }
  }
}

extension_mappings:
  ".tsx": ["react-typescript", "testing-frontend"]
  ".vue": ["vue-typescript", "testing-frontend"]
  ".go": ["golang", "testing-strategies"]
  ".dingo": ["dingo", "golang", "testing-strategies"]
  ".rs": ["rust", "testing-strategies"]
  ".py": ["python", "testing-strategies"]

config_file_patterns:
  package.json:
    check: "dependencies.react exists"
    skills: ["react-typescript", "state-management", "testing-frontend"]
    mode: "frontend"

  package.json:
    check: "dependencies.vue exists"
    skills: ["vue-typescript", "state-management", "testing-frontend"]
    mode: "frontend"

  go.mod:
    check: "file exists"
    skills: ["golang", "api-design", "database-patterns"]
    mode: "backend"

  go.mod + *.dingo:
    check: "go.mod exists AND any .dingo files present"
    skills: ["dingo", "golang", "api-design", "database-patterns"]
    mode: "backend"
    note: "Dingo projects always include golang skill since Dingo transpiles to Go"

  Cargo.toml:
    check: "file exists"
    skills: ["rust", "api-design"]
    mode: "backend"

  pyproject.toml:
    check: "file exists"
    skills: ["python", "api-design"]
    mode: "backend"

  bun.lockb:
    check: "file exists AND no react/vue in package.json"
    skills: ["bunjs", "api-design"]
    mode: "backend"

directory_patterns:
  "src/routes/":
    indicator: "React Router structure"
    skills: ["react-typescript"]

  "src/components/":
    indicator: "Component-based frontend"
    skills: ["react-typescript", "vue-typescript"]

  "cmd/":
    indicator: "Go standard project layout"
    skills: ["golang"]

  "src/main.rs":
    indicator: "Rust binary crate"
    skills: ["rust"]

  "frontend/":
    indicator: "Separate frontend directory (fullstack)"
    note: "Check for backend/ as well"

  "backend/":
    indicator: "Separate backend directory (fullstack)"
    note: "Check for frontend/ as well"

# Step 1: Find ALL config files (not just first match)
find_all_configs() {
  configs=()
  [ -f "package.json" ] && configs+=("package.json")
  [ -f "go.mod" ] && configs+=("go.mod")
  [ -f "Cargo.toml" ] && configs+=("Cargo.toml")
  [ -f "pyproject.toml" ] && configs+=("pyproject.toml")
  [ -f "bun.lockb" ] && configs+=("bun.lockb")

  # Check for Dingo files (go.mod must also exist)
  # Note: "dingo" is a detection indicator, not an actual config file name
  if [ -f "go.mod" ] && find . -name "*.dingo" -type f ! -path "./.git/*" ! -path "./node_modules/*" ! -path "./vendor/*" -print -quit | grep -q .; then
    configs+=("dingo")
  fi

  echo "${configs[@]}"
}

# Step 2: Analyze EACH config file
analyze_all_configs() {
  local detected_stacks=()

  # Check package.json
  if [ -f "package.json" ]; then
    if grep -q '"react"' package.json; then
      detected_stacks+=("react-typescript")
    elif grep -q '"vue"' package.json; then
      detected_stacks+=("vue-typescript")
    fi
  fi

  # Check go.mod (and optionally Dingo)
  if [ -f "go.mod" ]; then
    # Check if this is a Dingo project
    if find . -name "*.dingo" -type f ! -path "./.git/*" ! -path "./node_modules/*" ! -path "./vendor/*" -print -quit | grep -q .; then
      detected_stacks+=("dingo")
      # Dingo always co-loads golang
      detected_stacks+=("golang")
    else
      detected_stacks+=("golang")
    fi
  fi

  # Check Cargo.toml
  if [ -f "Cargo.toml" ]; then
    detected_stacks+=("rust")
  fi

  # Check pyproject.toml
  if [ -f "pyproject.toml" ]; then
    detected_stacks+=("python")
  fi

  # Check bun.lockb (only if NOT frontend)
  if [ -f "bun.lockb" ] && ! grep -q '"react"\|"vue"' package.json 2>/dev/null; then
    detected_stacks+=("bunjs")
  fi

  echo "${detected_stacks[@]}"
}

# Step 3: Determine mode
determine_mode() {
  local stacks=("$@")
  local has_frontend=false
  local has_backend=false

  for stack in "${stacks[@]}"; do
    case "$stack" in
      react-typescript|vue-typescript)
        has_frontend=true
        ;;
      golang|rust|python|bunjs|dingo)
        has_backend=true
        ;;
    esac
  done

  if [ "$has_frontend" = true ] && [ "$has_backend" = true ]; then
    echo "fullstack"
  elif [ "$has_frontend" = true ]; then
    echo "frontend"
  elif [ "$has_backend" = true ]; then
    echo "backend"
  else
    echo "unknown"
  fi
}

# Step 4: Map stacks to skills
map_stacks_to_skills() {
  local stacks=("$@")
  local skills=(
    # Core skills (ALWAYS included)
    "universal-patterns"
    "testing-strategies"
    "debugging-strategies"
  )

  for stack in "${stacks[@]}"; do
    case "$stack" in
      react-typescript)
        skills+=("react-typescript" "state-management" "testing-frontend")
        ;;
      vue-typescript)
        skills+=("vue-typescript" "state-management" "testing-frontend")
        ;;
      golang)
        skills+=("golang" "api-design" "database-patterns")
        ;;
      dingo)
        skills+=("dingo" "golang" "api-design" "database-patterns")
        ;;
      rust)
        skills+=("rust" "api-design")
        ;;
      python)
        skills+=("python" "api-design")
        ;;
      bunjs)
        skills+=("bunjs" "api-design")
        ;;
    esac
  done

  # Deduplicate
  echo "${skills[@]}" | tr ' ' '\n' | sort -u
}

# Step 5: Complete detection
detect_project_stack() {
  # Check explicit preference first
  local explicit_stack=$(jq -r '.pluginSettings.dev.stack // empty' .claude/settings.json 2>/dev/null)
  if [ -n "$explicit_stack" ]; then
    echo "Using explicit stack from .claude/settings.json"
    return
  fi

  # Auto-detect all stacks
  local detected_stacks=($(analyze_all_configs))

  if [ ${#detected_stacks[@]} -eq 0 ]; then
    echo "ERROR: No stack detected"
    return 1
  fi

  # Determine mode
  local mode=$(determine_mode "${detected_stacks[@]}")

  # Map to skills
  local skills=($(map_stacks_to_skills "${detected_stacks[@]}"))

  # Output result
  echo "Detected: ${detected_stacks[*]}"
  echo "Mode: $mode"
  echo "Skills: ${skills[*]}"
}

detect_react() {
  # Check package.json
  if [ -f "package.json" ]; then
    # React in dependencies or devDependencies
    if jq -e '.dependencies.react // .devDependencies.react' package.json >/dev/null 2>&1; then
      # Check for TypeScript
      local has_typescript=false
      if jq -e '.dependencies["@types/react"] // .devDependencies["@types/react"]' package.json >/dev/null 2>&1; then
        has_typescript=true
      fi

      # Get version
      local react_version=$(jq -r '.dependencies.react // .devDependencies.react' package.json | sed 's/[^0-9.]//g')

      echo "react-typescript"
      echo "version: $react_version"
      echo "typescript: $has_typescript"
      return 0
    fi
  fi

  return 1
}

detect_vue() {
  if [ -f "package.json" ]; then
    if jq -e '.dependencies.vue' package.json >/dev/null 2>&1; then
      local vue_version=$(jq -r '.dependencies.vue' package.json | sed 's/[^0-9.]//g')
      echo "vue-typescript"
      echo "version: $vue_version"
      return 0
    fi
  fi

  return 1
}

detect_go() {
  if [ -f "go.mod" ]; then
    local go_version=$(grep '^go ' go.mod | awk '{print $2}')
    local module_name=$(grep '^module ' go.mod | awk '{print $2}')

    echo "golang"
    echo "version: $go_version"
    echo "module: $module_name"
    return 0
  fi

  return 1
}

detect_rust() {
  if [ -f "Cargo.toml" ]; then
    local package_name=$(grep '^\[package\]' -A 5 Cargo.toml | grep '^name' | cut -d'"' -f2)
    local edition=$(grep '^\[package\]' -A 5 Cargo.toml | grep '^edition' | cut -d'"' -f2)

    echo "rust"
    echo "edition: $edition"
    echo "package: $package_name"
    return 0
  fi

  return 1
}

detect_python() {
  if [ -f "pyproject.toml" ]; then
    local has_fastapi=$(grep -i 'fastapi' pyproject.toml)
    local has_django=$(grep -i 'django' pyproject.toml)

    echo "python"
    [ -n "$has_fastapi" ] && echo "framework: fastapi"
    [ -n "$has_django" ] && echo "framework: django"
    return 0
  fi

  return 1
}

detect_bun() {
  # Bun backend (NOT frontend with Bun runtime)
  if [ -f "bun.lockb" ]; then
    # Check if this is a frontend project
    if [ -f "package.json" ]; then
      if jq -e '.dependencies.react // .dependencies.vue' package.json >/dev/null 2>&1; then
        # This is frontend using Bun runtime, not Bun backend
        return 1
      fi
    fi

    # This is a Bun backend project
    echo "bunjs"
    return 0
  fi

  return 1
}