Extend the game knowledge
Game-specific facts.
A shared Keldrin host.
Learn how JSON adapters describe a dedicated server while Keldrin retains control of trusted operations, compatibility and safety.
Developer Preview
The MIT-licensed 0.9.111 SDK supports JSON authoring and bounded checks. It is not a stable SDK or complete game certification. Historical 0.9.108/.110 snapshots remain separate.
GAME ADAPTERS
Understand the contract.
JSON-first authoring, supported host mechanisms, limitations and access status.
Read the overview ↗ AUTHORINGStart with measured facts.
Choose supported primitives, understand host bounds and follow the Terraria example matrix.
Explore authoring ↗ SIX COMMANDSKnow what checks prove.
Structural schema, semantic validation, signed compilation and synthetic Setup replay.
Command reference ↗ EVIDENCE & REVIEWVerify the actual operation.
The 22-check verification ledger, scoped evidence and official review/signing workflow.
Verification and release ↗