Built with Mojang Mappings native namespace — works because MC 26.1+ ships unobfuscated bytecode.

Runtime tested

Loaded successfully on MC 26.1.1 + Fabric Loader 0.19.2 alongside 167 other mods (Sodium, Iris, Distant Horizons, Flashback 0.40.0, full Fabric API 0.148.2+26.1.2, etc.).

Features

• Merge multiple Flashback replays into one
• Cross-source player entity dedup (UUID-level)
• LWW world state reconciliation (115K+ block overwrites/0 conflicts in production tests)
• Global packet dedup (chat, sounds, particles)
• Multi-world support
• Per-replay checkbox UI in Flashback's replay selection screen
• /multiview merge slash command

Requires

• Fabric Loader >=0.15.0
• Fabric API
• Flashback 0.40.0+
• Java 21+ (MC 26.1 needs Java 25 runtime)

Merge engine is byte-identical to the 1.21.x release — same merge orchestrator validated against real multiplayer replay data (4 POV / 2h37 / 27,581 entities merged / 0 conflicts).