Unified executor over Claude Agent SDK, Codex app-server, Cursor Agent SDK, and Vercel AI SDK. One call = one full agent loop, with skills, MCP, tools, and cross-backend lifecycle hooks + steering.
Sikong is a **Rust-based** recursive agent engine for self-improving autonomous task execution. The Rust implementation in `src/` is the active mainline; an older Go/Bun workspace/client track remains in the repository as pre-cleanup reference material. The Rust crate (`Cargo.toml` → `src/`) provides: