Copper Golem Patch

First public release.

Compatibility

• Supports Minecraft 1.21.9 through 26.2 on Paper.
• One jar covers the whole range. It is built against the 1.21.9 API and targets Java 21 bytecode, so the same file loads on Java 21 servers (1.21.9–1.21.11) and Java 25 servers (26.x) alike.
• 1.21.9 is the floor by definition — it is the version that introduced Copper Golems.
• All five supported versions are compiled and unit-tested on every commit.

Fixed

• Golems could stand idle for up to 5 minutes, ignoring empty chests placed right next to them.

  When a golem gave up on an item that no chest would accept, it marked that item type unsortable for 5 minutes and refused to pick anything up until the mark expired. An empty-handed golem is only ever offered copper chests to look at, so it could never notice a storage chest you added in the meantime — and noticing one was the only thing that would have cleared the mark. Adding chests to unblock a stalled setup simply did nothing.

  The retry window is now 20 seconds: a stuck golem retries quickly, discovers newly placed chests, and resumes sorting.

Changed

• give-up.unplaceable-ttl-seconds default: 300 → 20. This value doubles as the retry interval, which is why it has to stay short.