go-skills

Development

Shared Go best practices for LlamaFarm CLI. Covers idiomatic patterns, error handling, and testing.

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Source SKILL.md: https://github.com/llama-farm/llamafarm/blob/HEAD/.claude/skills/go-skills/SKILL.md

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Go Skills for LlamaFarm CLI

Shared Go best practices for LlamaFarm CLI development. These guidelines ensure idiomatic, maintainable, and secure Go code.

Tech Stack

Go 1.24+
Cobra (CLI framework)
Bubbletea (TUI framework)
Lipgloss (terminal styling)

Directory Structure

cli/
  cmd/           # Command implementations
    config/      # Configuration types and loading
    orchestrator/ # Service management
    utils/       # Shared utilities
    version/     # Version and upgrade handling
  internal/      # Internal packages
    tui/         # TUI components
    buildinfo/   # Build information

Quick Reference

Error Handling

Always wrap errors with context: fmt.Errorf("operation failed: %w", err)
Use sentinel errors for expected conditions: var ErrNotFound = errors.New("not found")
Check errors immediately after function calls

Concurrency

Use sync.Mutex for shared state protection
Use sync.RWMutex when reads dominate writes
Use channels for goroutine communication
Always use defer for mutex unlocks

Testing

Use table-driven tests for comprehensive coverage
Use interfaces for mockability
Test file names: *_test.go in same package

Security

Never log credentials or tokens
Redact sensitive headers in debug logs
Validate all external input
Use context.Context for cancellation

Checklist Files

File	Description
patterns.md	Idiomatic Go patterns
concurrency.md	Goroutines, channels, sync
error-handling.md	Error wrapping, sentinels
testing.md	Table-driven tests, mocks
security.md	Input validation, secure coding

Go Proverbs to Remember

"Don't communicate by sharing memory; share memory by communicating"
"Errors are values"
"A little copying is better than a little dependency"
"Clear is better than clever"
"Design the architecture, name the components, document the details"

Common Patterns in This Codebase

HTTP Client Interface

type HTTPClient interface {
    Do(req *http.Request) (*http.Response, error)
}

Process Management with Mutex

type ProcessManager struct {
    mu        sync.RWMutex
    processes map[string]*ProcessInfo
}

Cobra Command Pattern

var myCmd = &cobra.Command{
    Use:   "mycommand",
    Short: "Brief description",
    RunE: func(cmd *cobra.Command, args []string) error {
        // Implementation
        return nil
    },
}

Bubbletea Model Pattern

type myModel struct {
    // State fields
}

func (m myModel) Init() tea.Cmd { return nil }
func (m myModel) Update(msg tea.Msg) (tea.Model, tea.Cmd) { /* ... */ }
func (m myModel) View() string { return "" }