Errors that reach the person who caused them, and limits that stop a typo taking the server down.

Every server error came back as "Please check out minecraft server console" -- the one place a child working in Scratch cannot look -- and the extension checked for the error marker in only one place, so everywhere else the error silently became the block value. Failures now carry the command and the real cause, and Scratch reports each distinct one once.

setBlocks is capped at a million blocks and createExplosion at power 20, so a coordinate typed with an extra digit is refused rather than stalling the main thread until the watchdog kills the server.

The fill loop resolves its material once instead of three times per block.

entity.getRotation now reports the same compass bearing as player.getRotation; they disagreed by 360 degrees about the same player.