Java Edition 23w51a

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 "title": "Minecraft 23w51a",
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 "field": "''(link to Java Edition article, displayed as Java Edition)''",
 "label": "(link to Edition article, displayed as Edition)"
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 {
 "field": "December 18, 2023",
 "label": "Release date"
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 {
 "field": "(link to Snapshot article, displayed as Snapshot)",
 "label": "(link to Version types article, displayed as Type)"
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 {
 "field": "(link to Java Edition 1.20.5 article, displayed as 1.20.5)",
 "label": "Snapshot for"
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 "field": "[https://piston-data.mojang.com/v1/objects/c54391b4de6db1b63f880d2fc4439df89798adf3/client.jar Client] ([https://piston-meta.mojang.com/v1/packages/e7f5eda72c5ddee1828f629f00f5d97a3d1fd9f9/23w51a.json .json])<br />[https://piston-data.mojang.com/v1/objects/e44e1d8c34f3020b0485ddd1436e91134b7de9a3/server.jar Server]",
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 "label": "(link to Obfuscation map article, displayed as Obfuscation maps)"
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 {
 "field": " <span style=\"font-size:smaller\"><abbr title=\"decimal\">dec</abbr>: </span>1073741993<br /> <span style=\"font-size:smaller\"><abbr title=\"hexadecimal\">hex</abbr>: </span>400000A9",
 "label": "(link to Protocol version article, displayed as Protocol version)"
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 {
 "field": "3801",
 "label": "(link to Data version article, displayed as Data version)"
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 {
 "field": "22",
 "label": "<span style=\"white-space: normal;\">(link to Pack format#List of pack formats article, displayed as Resource pack format)</span>"
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 {
 "field": "27",
 "label": "<span style=\"white-space: normal;\">(link to Pack format#List of pack formats article, displayed as Data pack format)</span>"
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 "field": "<span class=\"plainlinks\">[https://en.wikipedia.org/wiki/Java_version_history#Java_SE_17_.28LTS.29 Java SE 17]</span>",
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 "invimages": [],
 "footer": "<table style=\"margin: auto; word-break: break-word;\">\n<tr style=\"background: inherit;\">\n<td style=\"padding: 0.4em\" rowspan=\"2\">[[Java Edition 1.20.4|<span style=\"margin-right:-0.35em\">◄</span>◄  1.20.4]]</td>\n<td style=\"padding: 0.4em\">'''[[Java Edition 1.20.5|1.20.5]]'''</td>\n<td style=\"padding: 0.4em\" >[[Java Edition 1.20.6| 1.20.6 <span style=\"margin-right:-0.35em\">►</span>►]]</td>\n</tr>\n<tr style=\"background: inherit;\">\n\n<td style=\"padding: 0.4em\">''' 23w51a'''</td>\n<td style=\"padding: 0.4em\">\n[[Java Edition 23w51b| 23w51b ►]]\n</td>\n</tr>\n</table>"
}

23w51a is the first snapshot for Java Edition 1.20.5, released on December 18, 2023,^[1] which adds armadillos and wolf armor along with many bug fixes.

👁 Image
Armadillo scute

• Dropped by armadillos when brushed.
• Dispensers can be used to brush armadillo scutes off armadillos.
• Can be used to craft wolf armor.

Spawn eggs

• 👁 Image
  Armadillo spawn egg

👁 Image
Wolf armor

• Crafted with 6 armadillo scutes in a harness shape.
• Protects wolves from damage.
  • Wolf armor gives wolves the same protection level as diamond horse armor.
• Using wolf armor on an adult tamed wolf equips the armor on the wolf, and using shears drops the armor.
  • Only a wolf's owner can put on / shear off wolf armor. That also excludes dispensers.
• If a wolf dies while wearing armor, it drops the armor.

👁 Image
Armadillo

• The winner of Minecraft Live 2023's Mob Vote.
• A passive mob that spawns in savanna biomes with the same frequency as chickens and pigs.
• Has 12HP👁 ❤️
  × 6 health points.
• Can drop armadillo scutes either periodically or when brushed, but drops no loot when killed.
  • Armadillos drop scutes at around the same rate as chickens lay eggs.
  • Brushing takes some durability from the brush.
• Can be bred with spider eyes.
• If an armadillo detects a threat, it rolls up.
  • Threats include:
    • A player sprinting.
    • A player in a vehicle or mounted.
    • Undead mobs.
  • Special cases where an armadillo don't roll up include when it is:
    • Fleeing.
    • In water or in the air.
    • On a leash.
  • When an armadillo is rolled up it cannot walk nor eat, and isn't be tempted by food.
  • While rolled up, armadillos continuously scan for threats. If no threats are detected for 3 seconds (60 ticks), they unroll.

Attributes

• Added the generic.scale attribute.
  • Allows changing the size of any mob to anywhere between 0.0625 and 16 times their default size.
• Added the generic.step_height attribute.
  • Determines the max height in blocks where a mob can walk above without jumping.
  • Default is 0.6, and the valid range is from 0 to 10.
• Added the generic.block_interaction_range and generic.entity_interaction_range attributes.
  • Determines the maximum range a player can interact with blocks and entities, respectively.
  • They both range between 0 and 64, with the default value being 4.5 for blocks and 3 for entities.

Subtitles

• Added a subtitle for traveling through a Nether portal, "Portal noise fades".

Turtle scute

• Renamed "Scute" to "Turtle Scute".

General

• FactorCalculationData has been removed from mob effect instance tags.

Shulkers

• Are no longer able to destroy armor stands.

Llama spits

• They now use a new damage type spit instead of mob_projectile.
• Are no longer able to destroy armor stands.

Advancements

• Armadillos are now required for the "Two by Two" advancement.
• The "The Parrots and the Bats" advancement can be granted by breeding armadillos now.

Data pack

• The pack format version is now 27.

Effect

• The background texture of the small effect UI has been changed.

These changes only take effect when the Update 1.21 experimental data pack is enabled.

Trial spawners

• Now have the same two default loot tables as they have in trial chambers.

Breeze

• Added sounds for projectile deflection, 'charging up attack', the breeze being in the air, and a 'whirl' idle sound.
• Tweaked the existing sounds.
• Separate eyes textures have merged into the head.

Wind charge

• The texture has been changed. However, the in-game appearance is not affected.

69 issues fixed

From released versions before 1.20

• MC-100994 – Items in hotbar appear on top of tab menu.
• MC-117955 – Player teleports to the top when crushed by a piston head.
• MC-130244 – When opening chat in mode, previous messages aren't visible.
• MC-153643 – Debug overlay is rendered behind hotbar items.
• MC-167375 – Baby turtle subtitles are grammatically incorrect.
• MC-169389 – End portals sometimes teleport the player to Overworld coordinates.
• MC-171177 – The player can enter Nether portals in Creative mode by running against the frame of the portal.
• MC-172898 – Equipping armor in Creative via right click causes it to disappear from the hotbar for a frame.
• MC-173672 – Title text renders in front of player names in player list.
• MC-184066 – Respawn anchors don't produce an ambient sound.
• MC-184622 – Sound for exiting a portal/travelling to another dimension does not use its subtitle string despite it existing in en_us.json.
• MC-185379 – Baby polar bear subtitle does not explicitly mention it comes from a baby polar bear.
• MC-187267 – Title text renders in front of sidebar.
• MC-193460 – Inconsistent layering of sidebar and debug screen () text.
• MC-193511 – Title text renders in front of narrator text.
• MC-193515 – Boss bar text renders in front of narrator text.
• MC-193517 – Boss bar text renders in front of sidebar.
• MC-193521 – Boss bar text renders in front of .
• MC-193524 – Boss bar text strikethough/underline renders on list.
• MC-193753 – Respawn anchor ambient sound subtitle refers to it as a portal.
• MC-194948 – Block breaking subtitle inconsistent with painting, item frame and lead breaking subtitles.
• MC-198492 – Players can be pushed into danger in situations where they wouldn't normally be damaged.
• MC-198787 – Inefficient streams in GoalSelector.
• MC-198963 – Chat text renders in front of player names in player list.
• MC-216071 – Splash text resets if you hit escape on the Multiplayer menu, but not the Singleplayer menu.
• MC-218811 – Big dripleaves tilt when touched from the side.
• MC-219899 – Bone meal used on rooted dirt causes the particles to appear above it, despite the growth being below it.
• MC-234889 – Potion effect icons displayed within the HUD can overlap boss bars.
• MC-238242 – There is an unnecessary black pixel in the upper right corner of small potion UI icons in the inventory.
• MC-248961 – takenDamage for achievement criteria is calculated wrongly when the player has equipped a helmet.
• MC-249335 – Using bone meal on mangrove leaves spawns growth particles at the center of the block instead of below it.
• MC-250432 – key always unpauses the game in Demo mode.
• MC-251027 – Wearing a helmet doesn't reduce the damage of falling anvils or stalactites by ¹⁄₄.
• MC-252409 – Memory statistics within the debug menu contain some unnecessary spaces.
• MC-259587 – Negative item durability causes the durability bar to render incorrectly.
• MC-261577 – The nether portal overlay is rendered completely opaque when using spyglasses while standing inside of nether portals.
• MC-266990 – Maps with the same 'map' tag value, but different 'display' tag data can cause markers to disappear.

From 1.20

• MC-263256 – Chat renders on top of , blocking information.

From 1.20.1

• MC-263641 – Boss bar text no longer renders behind potion effect icons.
• MC-264597 – debug menu underlined text renders over subtitles.
• MC-264637 – Text shaders resource packs cause subtitles to flicker.

From 1.20.2

• MC-265541 – player.dat_old won't be read even if player.dat doesn't exist.
• MC-265669 – Hotbar text renders above subtitle background but under subtitle text.
• MC-266135 – Cached macro commands ignore permission level, allowing limited permission escalation.
• MC-266136 – Macro commands ignore function-permisson-level server setting, including when lower than default.
• MC-266334 – Shulker bullets destroy armor stands.
• MC-266389 – Glow berry particles are barely visible when bonemealed.
• MC-266589 – Armor durability is changed when swapping on Creative.
• MC-266628 – High polling rate causing stuttering.
• MC-266960 – Bossbar text renders in front of player list background and player icons.

From 1.20.3

• MC-265835 – The freezing effect is rendered totally opaque when using a spyglass.
• MC-266055 – Opening or closing a copper door or trapdoor while holding an axe / honeycomb grants wax-related advancement.
• MC-266144 – Copper doors are not part of the #doors item tag.
• MC-266145 – Copper trapdoors are not part of the #trapdoors item tag.
• MC-266308 – Copper bulbs have unused "turn_off" sound.
• MC-266430 – Breeze on top of a non-full block produces particles of the block below it.
• MC-266432 – Exposed, weathered and oxidised copper bulbs are unwaxed in trial chambers.
• MC-266469 – When attacked, breezes sometimes stop pathfinding, jumping, or firing wind charges.
• MC-266533 – Breeze's AI has serious flaws in open terrain.
• MC-266680 – The glowing outline isn't applied to the eyes or eyebrows of breezes.
• MC-266685 – The entity shadows of breezes are too large in relation to the size of their models.
• MC-266688 – Breeze model's glowing eyes are not resource pack-friendly.
• MC-266738 – Subtitles string "subtitles.block.trial_spawner.spawn_mob" is misleading and inconsistent.
• MC-266879 – Clouds, entity hitboxes, block outlines, specially rendered blocks, and enchantment glints, render through the insides of breezes' eyes and eyebrows.
• MC-266909 – Breezes don't have smooth transitions to their idle states when they stop moving.
• MC-266999 – Crafter's tooltip buttons can still be visible to players on Spectator mode.
• MC-267133 – Breezes can't attack or move when there is no land around them and they are on the same height block as the player.
• MC-267193 – A function with /return fail run in chat doesn't indicate failure.

From 1.20.4

• MC-267194 – /return run function in combination with a fork and a function that doesn't return has inconsistent behavior.

• The scale attribute comes from the April fools snapshot 23w13a_or_b mainly taken from the attribute "minecraft:general.scale" or the "transform scale" command.
• 23w51a, along with 23w51b, was released on the latest calendar date of all snapshots, on December 18. It beats 15w51a and 15w51b which were released on December 17.