v1.1.23 - 2026-06-26

Release Notes

Added

• uplc: Evaluate phase-two scripts with protocol-aware builtin semantics and parse PlutusV3 PV11 cost models. @colll78, @Riley-Kilgore

Fixed

• uplc: Refresh default cost models parameters and fix discrepancies between the various semantics and languages. @KtorZ
• aiken-lang: Preserve typed expect assignments during unused-binding cleanup so Data validation still runs even when the bound name is unused. Fixes #1325. @knoal
• aiken-lang: Emit a parse error instead panicking when a @tag(...) decorator value exceeds usize::MAX. Fixes #1319. @SAY-5, @KtorZ
• aiken-lang: Use canonical type identity for cached expect decoder names to avoid collisions across modules and generic type shapes. Fixes #1331. @Riley-Kilgore

Install aiken 1.1.23

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/aiken-lang/aiken/releases/download/v1.1.23/aiken-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy ByPass -c "irm https://github.com/aiken-lang/aiken/releases/download/v1.1.23/aiken-installer.ps1 | iex"

Install prebuilt binaries into your npm project

npm install @aiken-lang/aiken@1.1.23

Install prebuilt binaries via Homebrew

brew install aiken-lang/tap/aiken

Download aiken 1.1.23

File	Platform	Checksum
aiken-aarch64-apple-darwin.tar.gz	Apple Silicon macOS	checksum
aiken-x86_64-apple-darwin.tar.gz	Intel macOS	checksum
aiken-x86_64-pc-windows-msvc.tar.gz	x64 Windows	checksum
aiken-aarch64-unknown-linux-musl.tar.gz	ARM64 MUSL Linux	checksum
aiken-x86_64-unknown-linux-musl.tar.gz	x64 MUSL Linux	checksum