golang-project-structure

Guidelines for organizing Go projects, the programming language developed at Google. They describe when to use a simple layout or standard folders such as cmd and internal.

In plain words
What is it for?
Use it when starting, structuring, or reviewing a Go application. It covers package names, project folders, configuration separation, and layouts for small or larger projects.
Why use it?
It removes uncertainty about where application code, business logic, configuration, and private packages should go. It also helps keep package dependencies small and avoids circular dependencies.

Cursor rule for Cursor

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add rules/mitas/cursor-rules/golang-project-structure
Clone the repo
git clone --depth 1 https://github.com/mitas/cursor-rules

Made for: Cursor.

Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 1,997 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00000 $0.01997
Opus 5 $0.00000 $0.00999
Sonnet 5 $0.00000 $0.00399
Haiku 4.5 $0.00000 $0.00200

Measured yesterday against content hash 7325cd9bf172, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

golang-project-structure scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.cursor/rules/golang-project-structure.mdc · 251 lines

How it starts

The opening of the file, as written. The whole thing — 251 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Go Project Structure Best Practices

Core Principles

  • Your project structure should reflect its complexity and size
  • Follow the standard Go project layout for consistency and maintainability
  • Package names should be lowercase, short, and not plural
  • Group related functionality in the same package
  • Keep package dependencies minimal and avoid circular dependencies
  • Use internal directories for code not meant for external use
  • Strictly separate application configuration from business logic

Flat Structure

For small projects and prototypes:

project/
├── main.go        # Application entry point
├── handler.go     # HTTP handlers
├── service.go     # Business logic
├── repository.go  # Database repository
├── config.go      # Configuration settings
├── utils.go       # Utility functions
├── go.mod         # Go module file
└── go.sum         # Go module dependency file

When to use:

  • Small utility applications
  • Prototypes and MVPs
  • Simple command-line tools
  • Learning projects

Standard Layout

For medium to large applications:

project/
├── cmd/                          # Main applications
│   └── app/                      # Application entry point
│       └── main.go               # Main application logic
├── internal/                     # Private application code
│   ├── handlers/                 # HTTP request handlers
│   │   └── user_handler.go       # User-specific handler
│   ├── services/                 # Business logic layer
│   │   └── user_service.go       # User-specific service
│   ├── repositories/             # Data access layer
│   │   └── user_repo.go          # User-specific repository
│   └── models/                   # Data models
│       └── user.go               # User model
├── pkg/                          # Public libraries for external use
│   └── common/                   # Common utilities
├── configs/                      # Configuration files
│   └── config.yaml               # Application config
├── api/                          # API definitions (OpenAPI/Swagger)
├── web/                          # Web assets (templates, static files)
├── docs/                         # Documentation
├── scripts/                      # Build and deployment scripts
├── test/                         # Additional test resources
├── go.mod                        # Go module definition
└── go.sum                        # Go module checksums

Read the full file on GitHub · 251 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. yesterday First seen · 251 lines · 1,997 tokens per session scan A 7325cd9bf172

Subscribe to this mod's changes

golang-project-structure is a cursor rule published in the GitHub repository mitas/cursor-rules (2 stars, last pushed 1y ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,997 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.