Release Notes - v0.204.5

v0.204.5

Title: Normalize script data and strengthen protocol decoding

Version: v0.204.5

This release normalizes script data across Plutus evaluation paths, strengthens UTxO-RPC and LocalStateQuery decoding, and stabilizes project maintenance and test fixtures.

🐛 Bug Fixes

• Fixed data at script boundaries: Script contexts and script inputs now pass datums, redeemers, inline datums, and Dijkstra required guard datums to scripts in the canonical CBOR form produced by serialiseData.

• Corrected UTxO-RPC protocol conversions: Zero-based cost-model mapping retains Plutus V1, protocol parameters retain Conway governance fields, and rational and committee conversions handle nil values and out-of-range values safely.

• Improved encoding compatibility during evaluation: V1 and V2 evaluation and V3 ScriptContext construction now pass script-visible datums and redeemers consistently when input CBOR uses definite or indefinite lengths; regression tests cover both forms.

• Stabilized Dijkstra test formatting: A missing trailing newline no longer causes gofmt and make format checks to report unnecessary changes.

• Clarified commenting guidance: AGENTS.md now documents when to explain invariants, non-obvious algorithms, gotchas, exported identifiers, and NOTE comments.

• Added LocalStateQuery block number decoding: GetChainBlockNo handles the origin response [0] and non-origin response [1, blockNo], while rejecting malformed CBOR and values outside int64.

• Refined validity range fixtures: Test comments now explain the validity range cases without changing runtime behavior.

Release: v0.204.5

Compare: v0.204.4…v0.204.5

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Docs authored by Doc Holiday