Developer tools

The Dev category is for diagnosing issues. Leave these features off during ordinary play unless you need their output. A Cheat edition development build can also expose a No Rotate Button Test intended for a fixed test setup, not for normal use.

Copy Item Data

1. Enable Copy Item Data and bind Copy Key.
2. Hover an item in a container and press the bind. Its item data goes to the clipboard.
3. Paste into a local text editor to inspect it. Check what the copied data contains before sharing it in a public issue.

Dev Mode

1. Enable Dev Mode only for an investigation.
2. Use Verbose Logging for extra internal messages, Log Event Dispatch for every event-bus post, or Rethrow Listener Exceptions to make listener failures surface immediately.
3. Reproduce the issue, save the relevant client log, then turn noisy options back off. Rethrowing is forced in a Fabric development runtime regardless of its switch.

Freeze Capture

1. Enable Freeze Capture before trying to reproduce a client stall.
2. After a stall of about 200 ms or more, inspect the thread-stack files under the instance’s config/blackaddons/dev/freezes/ directory.
3. Compare several captures at the same symptom rather than assuming one sample proves the cause.

Dumpers

1. Enable Dumpers and bind only the output you need: Dump Scoreboard, Dump Tab List, Dump Action Bar, or Dump Chat.
2. Reproduce the relevant game state and press the bind in world. The feature writes a dump and copies it to the clipboard.
3. Inspect and redact private chat or account information before attaching a dump to an issue.

For a report checklist, see Troubleshooting.