# CLAUDE.md for go-llm

## Build and Test Commands
- Build project: `go build ./...`
- Run all tests: `go test ./...`
- Run specific test: `go test -v -run <TestName> ./...`
- Tidy dependencies: `go mod tidy`

## Code Style Guidelines
- **Indentation**: Use standard Go tabs for indentation.
- **Naming**: 
  - Use `camelCase` for internal/private variables and functions.
  - Use `PascalCase` for exported types, functions, and struct fields.
  - Interface names should be concise (e.g., `LLM`, `ChatCompletion`).
- **Error Handling**:
  - Always check and handle errors immediately.
  - Wrap errors with context using `fmt.Errorf("%w: ...", err)`.
  - Use the project's internal `Error` struct in `error.go` when differentiating between error types is needed.
- **Project Structure**:
  - `llm.go`: Contains core interfaces (`LLM`, `ChatCompletion`) and shared types (`Message`, `Role`, `Image`).
  - Provider implementations are in `openai.go`, `anthropic.go`, and `google.go`.
  - Schema definitions for tool calling are in the `schema/` directory.
- **Imports**: Organize imports into groups: standard library, then third-party libraries.
- **Documentation**: Use standard Go doc comments for exported symbols.
- **README.md**: The README.md file should always be kept up to date with any significant changes to the project.

## CLI Tool
- Build CLI: `go build ./cmd/llm`
- Run CLI: `./llm` (or `llm.exe` on Windows)
- Run without building: `go run ./cmd/llm`

### CLI Features
- Interactive TUI for testing all go-llm features
- Support for OpenAI, Anthropic, and Google providers
- Image input (file path, URL, or base64)
- Tool/function calling with demo tools
- Temperature control and settings

### Key Bindings
- `Enter` - Send message
- `Ctrl+I` - Add image
- `Ctrl+T` - Toggle tools panel
- `Ctrl+P` - Change provider
- `Ctrl+M` - Change model
- `Ctrl+S` - Settings
- `Ctrl+N` - New conversation
- `Esc` - Exit/Cancel