{
  "instruction": "Use cmd/ for entry points and internal/ for private application packages",
  "relevant_when": "Agent builds a Go web service or microservice with multiple packages",
  "context": "Go projects must use cmd/<name>/main.go for entry points (no business logic) and internal/ for all private application code. The Go compiler enforces that internal/ packages cannot be imported by other modules, providing encapsulation. Application code should never live at the project root alongside go.mod.",
  "sources": [
    {
      "type": "file",
      "filename": "skills/go-project-structure/SKILL.md",
      "tile": "tessl-labs/go-project-structure@0.2.0"
    }
  ],
  "checklist": [
    {
      "name": "cmd-entry-point",
      "rule": "Entry point main.go is in cmd/<name>/ directory and contains only dependency wiring and server startup, no business logic",
      "relevant_when": "Agent creates a Go project with multiple packages"
    },
    {
      "name": "internal-packages",
      "rule": "Application code is inside an internal/ directory to prevent external imports",
      "relevant_when": "Agent creates a multi-package Go project"
    },
    {
      "name": "no-root-application-code",
      "rule": "Business logic files are not placed directly in the project root alongside go.mod",
      "relevant_when": "Agent creates a Go project with cmd/ and internal/ layout"
    }
  ]
}