fastclaude

fastclaude is a small, completions-style Python interface backed by the installed Claude Code executable. It inherits Claude CLI authentication, including OAuth and subscriptions, without requiring direct Anthropic API integration.

• accepts complete, editable histories as aidialog.msg_parts.Msg objects
• compiles them into real Claude Code sessions rather than flattening them into a prompt
• lets Claude own the live agent loop
• exposes ordinary annotated Python callables as tools
• streams Claude output and supports native interruption
• remains stateless across requests

See DEV.md for the complete design, protocol findings, source references, and implementation.

Installation

pip install fastclaude

Development

pip install -e .

License

Apache License 2.0.