Starknet's Cairo Toolchain Gets v2.19.5 Update
Cairo v2.19.5 delivers Starknet compiler fixes for more reliable smart contracts. See what changed in Sierra generation and semantics—no hard fork, just a maintenance update.
Starkware has released Cairo v2.19.5, a maintenance update for the compiler and toolchain used in the Starknet ecosystem. The update was published on September 17 in the official starkwarelibs/cairo repository.
The release focuses on developerfacing fixes, including changes to Sierra code generation and Cairo semantics. These updates are meant to improve the reliability of the tooling developers use to build smart contracts.
The article notes that this is a compiler update rather than a Starknet network upgrade, so it does not trigger a hard fork. It also says claims about a specific proverperformance boost were not supported by the release notes.