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These guides teach interop by walking through one well-known library at a time. Each page starts with the concepts that force Sifr’s declaration style, then shows a minimal working path. Use the Rust Interop and Embedded Python Interop references when you need the full contract catalog.

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Rust crates

blake3

Direct @rust binding for a compatible hashing function, plus panic policy.

reqwest

Async HTTP through a local bridge that shapes responses into Sifr types.

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Python packages

schwifty

Typed opaque Python objects for IBAN validation with checked Result errors.

numpy

Native-trusted NumPy work behind a typed bridge, with buffer notes for views.

kafka-python

Foreign-thread Kafka callbacks with explicit lifetime and concurrency policy.