sprites-ex: Instructions file for Claude Code

Sprites Elixir SDK

An Elixir SDK for the Sprites code container runtime - a remote code execution platform for interactive development.

Quick Reference

Common Commands

# Install dependencies
mix deps.get

# Compile
mix compile

# Run tests
mix test

# Format code (REQUIRED before committing)
mix format

# Generate docs
mix docs

Test CLI

cd test_cli
mix deps.get
mix escript.build

# Usage
export SPRITES_TOKEN=your-token
./test-cli create my-sprite
./test-cli -sprite my-sprite -output stdout echo hello
./test-cli destroy my-sprite

Integration Tests (with Go test harness)

export SPRITES_TEST_TOKEN=your-token
export SDK_TEST_COMMAND=/path/to/sprites-ex/test_cli/test-cli
# Run from the Go SDK directory
go test -v

Project Structure

lib/sprites/
├── sprites.ex      # Main public API (entry point)
├── client.ex       # HTTP client for REST API (uses Req)
├── sprite.ex       # Sprite instance representation
├── command.ex      # Command execution via WebSocket (GenServer, uses gun)
├── protocol.ex     # Binary protocol codec for WebSocket messages
├── stream.ex       # Lazy Stream interface for command output
└── errors.ex       # Custom exceptions (APIError, CommandError, etc.)

Key Dependencies

• req - HTTP client for REST API calls
• gun - Erlang WebSocket/HTTP client for command execution
• jason - JSON encoding/decoding

Environment Variables

• SPRITES_TOKEN - Authentication token for Sprites API
• SPRITES_TEST_TOKEN - Authentication token for testing

Version Requirements

• Elixir: 1.18.4-otp-27
• Erlang: 27.0.1

(See .tool-versions for asdf configuration)

API Defaults

• Base URL: https://api.sprites.dev
• HTTP timeout: 30 seconds
• Create sprite timeout: 120 seconds
• WebSocket upgrade timeout: 10 seconds

Code Style

• Always run mix format before committing
• All public functions should have @doc and @spec
• Follow standard Elixir conventions