Durable workflows that feel like writing normal code.

Sayiir is a fast, lightweight durable workflow engine built in Rust with Python bindings. It checkpoints after each task and resumes from the last checkpoint — no deterministic replay, no DSLs, no separate infrastructure. Just a library you import.

• No deterministic replay — checkpoint & resume, not re-execution. Use any API, any library, zero determinism constraints
• A library, not a platform — add it as a dependency and run. No cluster, no scheduler, no separate workers
• Rust core, thin bindings — every language gets the same performance and safety guarantees
• Pluggable everything — swap storage backends, codecs, and runners without touching workflow code

• Documentation — full docs site
• Quick Start: Python
• Quick Start: Rust
• Architecture
• Comparisons — vs Temporal, Airflow, Prefect, Step Functions, Elsa

• Discord — questions, feedback, discussion
• Contributing — how to set up, build, test, and submit PRs

MIT Licensed — no lock-in, no vendor dependencies.