{{Infobox version
| title = Minecraft 17w13a
| edition = Java
| image = 17w13a.png
| image2 = Java Edition 17w13a.png
| type = Snapshot
| date = March 30, 2017
| parent = 1.12
| downloads = '''Original:'''<br>
[https://launcher.mojang.com/mc/game/17w13a/client/84867afe218d806aee91c2036cbc7b0d1ce19e99/client.jar Client] ([https://vault.omniarchive.uk/versions/java/client/release/1.12/pre/17w13a-0805/17w13a-0805.json .json])<br>
[https://launcher.mojang.com/mc/game/17w13a/server/9230038e59d214a2e5764c3c889e23241c183a8e/server.jar Server]<br>
'''Reupload:'''<br>
{{dl|8a11edbdd3d8be019b3eb85089f2f5d97ec3ac4e|client}} ({{dl|ec0d9ff2917f223b24725b259d7aea1249f4a07c|json}})<br>
{{dl|d3806f89b9c90cbfb78919a3bcc010ad2e5d6ebb|server}}
| prevparent = 1.11.2
| prev = 17w06a
| next = 17w13b
| nextparent = 1.12.1
}}<onlyinclude>

'''17w13a''' is the second [[snapshot]] for [[Java Edition 1.12]], released on March 30, 2017,<ref>{{snap|17w13a|March 30, 2017}}</ref> which adds parrots, advancements, knowledge books, and changes textures of some glazed terracotta.

17w13a was reuploaded an hour and a half after release to fix an issue on macOS.<ref>{{tweet|Dinnerbone|847369277380337664|Having reports of it not running on Mac OS - a hotfix will be out in about 7 minutes.|March 30, 2017}}</ref>

== Additions ==
=== Items ===
; [[File:Knowledge Book JE1.png|32px]] [[Knowledge book]]s
* A green-colored book.
* Currently obtainable only with the {{cmd|give @p knowledge_book}} command.
* A knowledge book with a <code>Recipes</code> tag, which contains a list of item IDs, is consumed and unlocks the specified items' recipes for any player that {{control|uses}} it.
** Especially useful when {{cmd|gamerule doLimitedCrafting}} is set to true.

; [[Spawn egg]]s
* [[File:Parrot Spawn Egg JE1 BE1.png|32px]] added [[Parrot]] spawn egg

=== Mobs ===
; [[Parrot]]s
* Tamable with [[cookie]]s.<!-- Do not change cookies to seeds! This article is about the development version 17w13a. The item parrots can be tamed with has been changed from cookies to seeds later in version 1.12-pre3. -->
* Fly around, but sit when "tired."
* Follow and crowd around nearby mobs.
* Imitates sounds of other mobs.
* {{control|Using}} tamed parrots places them on the player's shoulder.
** Let go if the player jumps.
** Can fly with players during [[elytra]] flight.
* Have {{hp|6}} health.
* Come in red, blue, green and cyan.

=== Gameplay ===
; Gamerules
* <code>doLimitedCrafting</code>
** Off by default.
** Enabling only allows players to craft recipes they have unlocked.

=== Command format ===
; <code>/[[Commands/recipe|recipe]] <give|take> [''player''] <''name''|*></code>
* Can unlock, or lock, the given recipes for the given player.
* If <code>*</code> is specified, it locks or unlocks all recipes for the player.

; <code>/[[Commands/advancement|advancement]] <grant|revoke|test> <''player''> <''advancement''> [''criterion'']</code>
* Can grant, test or revoke advancements, and particular advancement criteria, for a given player.

=== General ===
[[File:Advancement tree 17w13a.png|thumb|400px|Advancement tree in 17w13a.]]
; [[Advancement]]s
* Replaces [[Achievement/Java Edition|achievements]].
* Can be customized via JSON files.
* Tab-based UI.
** Currently only has one tab ("Minecraft") with 22 advancements.
** Different background per tab, single texture on repeat for now.
** Data-driven UI, including positioning and layout.
** Advancements in this version include:
{{AdvancementTable|Minecraft}}
{{AdvancementRow
|title=Minecraft
|bg=plain
|Grass Block
|''Descriptions were not added yet.''
|—
|Have a [[crafting table]] in the inventory.
|story/root
}}
{{AdvancementRow
|title=Mine stone
|bg=plain
|Wooden Pickaxe
|—
|Minecraft
|Have [[cobblestone]] in the inventory.
|story/mine_stone
}}
{{AdvancementRow
|title=Upgrade tools
|bg=plain
|Stone Pickaxe
|—
|Mine stone
|Have a [[stone pickaxe]] in the inventory.
|story/upgrade_tools
}}
{{AdvancementRow
|title=Smelt iron
|bg=plain
|Iron Ingot
|—
|Upgrade tools
|Have an [[iron ingot]] in the inventory.
|story/smelt_iron
}}
{{AdvancementRow
|title=Obtain armor
|bg=plain
|Iron Chestplate
|—
|Smelt iron
|Have any piece of iron [[armor]] in the inventory.
|story/obtain_armor
}}
{{AdvancementRow
|title=Deflect an arrow
|bg=plain
|Shield
|—
|Obtain armor
|Block incoming damage from a projectile with a [[shield]].
|story/deflect_arrow
}}
{{AdvancementRow
|title=Iron tools
|bg=plain
|Iron Pickaxe
|—
|Smelt iron
|Have an [[iron pickaxe]] in the inventory.
|story/iron_tools
}}
{{AdvancementRow
|title=Diamonds!
|bg=plain
|Diamond
|—
|Iron tools
|Have a [[diamond]] in the inventory.
|story/mine_diamond
}}
{{AdvancementRow
|title=Shiny gear
|bg=plain
|Diamond Chestplate
|—
|Diamonds!
|Have any piece of diamond armor in the inventory.
|story/shiny_gear
}}
{{AdvancementRow
|title=Enchant an item
|bg=plain
|Enchanted Book
|—
|Diamonds!
|Enchant an item in an [[enchanting table]].
|story/enchant_item
}}
{{AdvancementRow
|title=Bucket of lava
|bg=plain
|Lava Bucket
|—
|Smelt iron
|Have a [[lava bucket]] in the inventory.
|story/lava_bucket
}}
{{AdvancementRow
|title=Form obsidian
|bg=plain
|Obsidian
|—
|Bucket of lava
|Have [[obsidian]] in the inventory.
|story/form_obsidian
}}
{{AdvancementRow
|title=Enter the Nether
|bg=plain
|Flint and Steel
|—
|Form obsidian
|Enter the [[nether portal block]].
|story/enter_the_nether
}}
{{AdvancementRow
|title=Summon the Wither
|bg=plain
|Nether Star
|—
|Enter the Nether
|Unknown. Possibly unobtainable without commands.
|story/summon_wither
}}
{{AdvancementRow
|title=Create a beacon
|bg=plain
|Beacon
|—
|Summon the Wither
|Be near a [[beacon]] when it activates.
|story/create_beacon
}}
{{AdvancementRow
|title=Create a full beacon
|bg=fancy
|Beacon
|—
|Create a beacon
|Be near a 4-layer beacon when it activates.
|story/create_full_beacon
}}
{{AdvancementRow
|title=Obtain a Blaze Rod
|bg=plain
|Blaze Rod
|—
|Enter the Nether
|Have a [[blaze rod]] in the inventory.
|story/obtain_blaze_rod
}}
{{AdvancementRow
|title=Brew a Potion
|bg=plain
|Glass Bottle
|—
|Obtain a Blaze Rod
|Have any item with the ID <code>potion</code> in the inventory (water bottle works, but splash/lingering potions don't).
|story/brew_potion
}}
{{AdvancementRow
|title=Follow an Ender Eye
|bg=plain
|Eye of Ender
|—
|Obtain a Blaze Rod
|{{Control|Use}} an [[eye of ender]] while being within 64 blocks of a [[stronghold]].
|story/follow_ender_eye
}}
{{AdvancementRow
|title=Enter the End
|bg=plain
|End Stone
|—
|Follow an Ender Eye
|Enter the [[end portal block]]. 
|story/enter_the_end
}}
{{AdvancementRow
|title=Enter a Gateway
|bg=plain
|Ender Pearl
|—
|Enter the End
|Enter the [[end gateway block]]. Currently unobtainable in Survival; throwing an ender pearl into the gateway doesn't grant the advancement, and there's no crawling yet.
|story/enter_end_gateway
}}
{{AdvancementRow
|title=Learn to Fly
|bg=plain
|Elytra
|—
|Enter a Gateway
|Have an [[elytra]] in the inventory.
|story/elytra
}}
{{AdvancementTable|foot}}

; [[Narrator]]
* {{key|CTRL}} + {{key|B}} toggles a text-to-speech engine that automatically reads player chat messages, including the name.
* The narrator doesn't read commands or command outputs, nor it reads messages produced with {{cmd|me}}.

; [[NBT format]]
* <code>ShoulderEntityLeft</code> / <code>ShoulderEntityRight</code>: Contains entity data about an entity on the left and right shoulders of the player.
* <code>seenCredits</code>: Changes to 1 if the player leaves the End through the portal.
* <code>recipeBook</code>: A string containing a list of recipes, formatted as JSON, that the player has seen.
* <code>Recipes</code>: A list of crafting recipes to unlock for the player that right-clicks while holding a knowledge book.
** If this is not specified, the knowledge book is not consumed.

; [[Recipe book]]s
* Catalogs recipes that are unlocked when the criteria are met.
* When a recipe is clicked, it appears in the crafting grid, and can be crafted if materials are available.
* <code>recipes</code> folder added with all item recipes as <code>.json</code> files.

== Changes ==
=== Blocks ===
[[File:TerracottaSnapshotComparison.png|thumb|right|250px|Comparison of the terracotta texture changes.]]

; [[Glazed terracotta]]
* Textured changed for cyan, magenta, orange, and white glazed terracotta, to remove unintentional and potentially offensive imagery.<ref>https://www.reddit.com/r/Minecraft/comments/5sspmk/minecraft_snapshot_17w06a/ddhjm42/?context=1</ref>

; [[Beacon]]s
* Now display their name when hovering over them.

; [[Enchantment table]]s
* Now display their name when hovering over them.

=== Items ===
; [[Fishing rod]]s
* Changed the sound of bobbers being thrown.

=== General ===
; [[Achievement/Java Edition|Achievements]]
* Removed and replaced by advancements.

; [[Crafting]]
* Closing the crafting interface with items inside no longer drops the items in front of the player, but sends them instead to the inventory.

; Java version
* This is the first snapshot to use, and thus require, Java 8.<ref name="java 8">{{tweet|Dinnerbone|847408242233704448|Heads up modders: This snapshot is the first Minecraft version to require (and therefore use) Java 8. You can now finally use 7/8 features!|January 30, 2017}}</ref>

; Moving backwards
* The player's body now entirely faces to the front, when moving backwards.<ref>{{bug|MC-114900}}, resolved as "Works as Intended" – Maria Lemón, April 22, 2017</ref><ref>{{reddit|66s2px/in_17w16b_players_can_now_run_backwards_without|dglwcfv|It actually is a bug, it tries to rotate the body to the direction you are walking, but it can only do it so far, that is also why it basically picks a 'random direction'. Now it can actually understand when it is walking backwards and it stopped doing that weird behavior.|_Grum|April 22, 2017}}</ref>
** Prior to this snapshot, moving backwards would cause the player model to rotate one side, making it look like the player was strafing backwards somewhat.

== Fixes ==
{{fixes|fixedin=17w13a|prefix=Minecraft|otherissuescount=1
|;previous
|113377|New block Swastika
|113844|White Glazed Terracotta symbol (looks like the symbol of the Hungarian Nazi party)
}}
; From the current version, hotfixed
* Fixed the game not loading on macOS.</onlyinclude>

== Video ==
Video made by [[slicedlime]]:
{{yt|DA2pi7Kx9gQ}}

== Trivia ==
* 17w13a was previously removed from the [[launcher]] for some time, but was added back in September 2018.
* 17w13a has the longest wait between snapshots on the same development version, with 50 days having elapsed since the release of 17w06a on February 8, 2017.
** Until this point, the longest waits had been those between [[14w11b]] and [[14w17a]], which spanned 42 days.

== References ==
{{reflist}}

== Navigation ==
{{Navbox Java Edition versions|1.1x}}

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