rivencraft/docs/MINECRAFT_26_3_ALPHA_2.md

Rivencraft 1.0.1.3-alpha.1 — Minecraft 26.3

Experimental NeoForge 26.3 port preview. This is separate from the supported Minecraft 1.21.1 release and does not have feature parity. Use a disposable test world or make a backup first. Do not migrate a 1.21.1 Rivencraft world to this alpha.

Changes since 1.0.1.2-alpha.1

• An unbound Descriptive Book now opens a naming screen. Binding it creates a distinct prototype Age with a random seed; duplicate names receive a numbered suffix.
• A bound Descriptive Book opens a book screen whose destination panel can be clicked to enter its Age. The server validates the held book and waits for the client's Age catalog acknowledgement before travel.
• Retired Age IDs are excluded when assigning a new book's Age name, so an archived world cannot be silently reused.

Still experimental

These Ages use prototype vanilla terrain. Page-authored generation, crafting and workstations, most items and blocks, portals, Link modifiers, instability, live destination previews, and optional mod integrations are not ported. The book panel is a placeholder, not a rendered destination view. The port status and open port issues track the remaining work. The stable 1.21.1 release remains available separately.

Verification

• Clean 26.3 Gradle build passed.
• Disposable dedicated-server smoke test passed: two distinct Age seeds and their terrain persisted across restart.
• The player verified Descriptive Book binding and travel in game on 2026-10-29.

These checks are not the full port acceptance matrix or a stability claim.