Release Notes - v0.39.1

v0.39.1 (May 1, 2026)

Title: Safer pruning, rollback recovery, and snapshot nonces

Date: May 1, 2026

Version: v0.39.1

Hi folks! Here’s what we shipped in v0.39.1.

Noted no new features: This patch release focuses on improvements and fixes.

Refined archive aware Bark cleanup behavior: Archived blocks now remain resolvable during prune and cleanup work because Bark leaves archive aware tombstones in place and reads honor them.

Preserved safer rollback cleanup near the Mithril boundary: Rollback cleanup now keeps gap UTxOs intact near the Mithril boundary, which makes rollback recovery safer.
Hardened archive aware Bark cleanup handling: Bark pruning and archival handling now preserve the resolvability of archived blocks during cleanup.
Corrected snapshot bootstrap nonce handling across state layouts: Snapshot bootstrap now reads epoch and snapshot nonces correctly across supported state layouts, which keeps epoch boundary validation correct after bootstrap.

Clarified patch release upgrade guidance: This is a patch release, and normal upgrade procedures are sufficient for most operators and users.
Highlighted safer pruning and rollback recovery: Bark pruning now preserves resolvable live UTxOs, and Mithril boundary rollback recovery now preserves the required gap block state for safe recovery.
Corrected snapshot nonce handling after bootstrap: Snapshot bootstrapped nodes now read the right nonce data across supported snapshot layouts so epoch boundary header and VRF validation continue correctly after bootstrap.

Thank you for trying!