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Release Notes - v0.196.0

Title: Add Byron PBFT validation and improve CBOR list decoding

Date: August 24, 2026

Version: v0.196.0

This release adds Byron PBFT validation and allows CBOR decoding to read list headers that use longer-than-necessary fixed-length encodings.

  • Added Byron PBFT validation: Both validation paths now check Byron headers and delegations, use genesis data to identify active delegates, apply the 22/100 issuer window, and follow the 2k activation and replacement rules. Issuer parsing blocks replay, and proxy signature checks use the correct domain tags for light and heavy proxies.

  • Improved CBOR list decoding: The decoder now reads list headers that use longer-than-necessary fixed-length encodings while preserving its fast path for canonical one-byte headers. Regression coverage protects both forms.

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