Durability Alerts 1.5.3 — first build for 1.21.9 – 1.21.11

Read this if you were on 1.21.9 or newer. Version 1.3.0 declared no upper version limit, so Minecraft let you install it on 1.21.9+ and it crashed on startup — the key binding API changed in that release. This build is compiled for 1.21.9 – 1.21.11 and fixes that. If you are on 1.21.6 – 1.21.8, download the other file instead; both are the same mod.

⚡ New Features

• Armor and offhand are now watched, not just the main hand
• New corner HUD showing what is about to break, with a durability bar
• Alerts are now drawn by the mod: configurable size, position, duration and a dark backdrop
• "Test alert" button to calibrate the look without breaking a tool
• Sound picker with 26 named sounds and instant preview
• Any Minecraft sound ID now works: minecraft:block.bell.use
• Formatting menu for alert messages, each option shown in its own style
• Live preview of the message with colors applied
• Alerts can be edited instead of deleted and recreated
• Full Spanish translation, with a manual language override in Settings

Improvements

• Threshold detection rewritten: alerts arm when the item is above them and disarm when they fire
• Checks every tick instead of every five, so fast tools no longer skip the last-hits window
• AutoSwitch now prefers a healthy tool over an empty slot
• Alert list shows the sound, and the whole panel is centred
• Settings split into two columns
• /durability is the new command, /golpes still works as an alias

Fixes

• Crash on startup for anyone running 1.21.9 or newer
• AutoSwitch was never saved and reset to off on every restart
• Alerts firing when swapping between two tools of the same type
• Alerts not firing at the exact threshold after a tool swap
• A corrupt config was overwritten silently; it is now backed up before defaults are written
• Config is read and written as UTF-8, so accented characters and symbols survive
• /durability create rejected sound IDs containing : or .
• Mod icon was missing from the mod list
• Menu errors were sent to chat behind the screen instead of shown on it
• Removed leftover template mixins
• LICENSE file contradicted the declared license

Your existing alerts carry over automatically — the old config format is migrated on first launch.