From 122ff939aa72131431d29e923f1971d388018cea Mon Sep 17 00:00:00 2001
From: koka <cnstiout@gmail.com>
Date: Sat, 29 Aug 2026 15:17:37 +0200
Subject: [PATCH] feat(ouch): restaurer le projectile Abjection

---
 CHANGELOG.md                                  |  5 +-
 build.gradle                                  | 18 +++--
 gradle.properties                             |  4 +-
 onlyfun/ABJECTION.md                          |  8 +++
 .../abjection/AbjectionRegistries.java        |  2 +-
 .../onlyfun/abjection/ShitBallItem.java       | 22 ++++++
 .../onlyfun/api/abjection/AbjectionItems.java | 19 +++++
 .../api/abjection/AbjectionProjectileApi.java | 39 +++++++++++
 ouch/build.gradle                             | 46 +++++++++++-
 .../sanctuary26/ouch/client/OuchClient.java   |  4 ++
 .../ouch/entity/ShitBallEntity.java           | 62 ++++++++++++++++
 .../registry/OuchAbjectionProjectiles.java    | 70 +++++++++++++++++++
 .../ouch/registry/OuchRegistries.java         |  1 +
 ouch/src/main/resources/fabric.mod.json       |  1 +
 .../ouch/entity/ShitBallContractSmoke.java    | 27 +++++++
 15 files changed, 314 insertions(+), 14 deletions(-)
 create mode 100644 onlyfun/src/main/java/fr/koka99cab/sanctuary26/onlyfun/abjection/ShitBallItem.java
 create mode 100644 onlyfun/src/main/java/fr/koka99cab/sanctuary26/onlyfun/api/abjection/AbjectionItems.java
 create mode 100644 onlyfun/src/main/java/fr/koka99cab/sanctuary26/onlyfun/api/abjection/AbjectionProjectileApi.java
 create mode 100644 ouch/src/main/java/fr/koka99cab/sanctuary26/ouch/entity/ShitBallEntity.java
 create mode 100644 ouch/src/main/java/fr/koka99cab/sanctuary26/ouch/registry/OuchAbjectionProjectiles.java
 create mode 100644 ouch/src/test/java/fr/koka99cab/sanctuary26/ouch/entity/ShitBallContractSmoke.java

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8eab01a..fe673de 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,7 +8,7 @@ Ce journal suit les **versions du modpack**. Lorsqu'un seul module change, sa ve
 
 ## Non distribué
 
-Modules modifiés : **I Like To Move It `0.0.0-alpha.15`**, **It's Alive `0.0.0-alpha.35`** et **Only Fun `0.0.0-alpha.21`**. Le pack distribué reste en `26.2.0-alpha.209` jusqu’à la prochaine release.
+Modules modifiés : **I Like To Move It `0.0.0-alpha.15`**, **It's Alive `0.0.0-alpha.35`**, **Only Fun `0.0.0-alpha.22`** et **Ouch `0.0.0-alpha.10`**. Le pack distribué reste en `26.2.0-alpha.209` jusqu’à la prochaine release.
 
 - double la vitesse de croisière du Happy Ghast lorsqu’un joueur le pilote, sans accélérer ses déplacements autonomes ;
 - conserve les données v3 et le protocole réseau 5, sans migration de sauvegarde ni nouvel ID.
@@ -18,6 +18,9 @@ Modules modifiés : **I Like To Move It `0.0.0-alpha.15`**, **It's Alive `0.0.0-
 - importe le cœur GPL historique d’Abjection dans Only Fun, sans onzième JAR : `/piss`, `/vomit`, `/shit` et `/smoke` retrouvent leurs durées, jets, impacts et messages ;
 - restaure `abjection:shit_ball` ainsi que le bloc boueux `abjection:shit_cube`, sa recette, son butin et ses ressources originales en FR/EN/RU ;
 - expose une API serveur unique pour les commandes et le futur raccourci, nettoie les actions temporaires à la mort, en spectateur ou à la déconnexion, et conserve les données v2 ainsi que le protocole réseau 2 d’Only Fun.
+- rend `abjection:shit_ball` lançable à la main et par dispenser grâce à une fabrique publique installée par Ouch, sans réenregistrer l’objet possédé par Only Fun ;
+- restaure le projectile historique de 0,25 bloc, sa consommation unique hors créatif, son rendu d’objet, son impact boueux et ses sept secondes de nausée ajoutées à la durée existante ;
+- déclare la dépendance sans cycle `ouch -> onlyfun` ; les données et protocoles réseau d’Ouch et d’Only Fun restent inchangés.
 
 ## `26.2.0-alpha.209`
 
diff --git a/build.gradle b/build.gradle
index 14ccd69..8ce9b43 100644
--- a/build.gradle
+++ b/build.gradle
@@ -3430,7 +3430,7 @@ tasks.register("verifyProgressivePauseMenuRelease") {
 		}
 		if (rootProject.pack_version != "26.2.0-alpha.209"
 			|| rootProject.sanctuary_version != "0.0.0-alpha.117"
-			|| rootProject.onlyfun_version != "0.0.0-alpha.21"
+			|| rootProject.onlyfun_version != "0.0.0-alpha.22"
 			|| release.pack_version != rootProject.pack_version || index.versionId != rootProject.pack_version
 			|| migration.source?.modules != [sanctuary: "0.0.0-alpha.108", onlyfun: "0.0.0-alpha.17"]
 			|| migration.target?.modules != [sanctuary: "0.0.0-alpha.109", onlyfun: "0.0.0-alpha.17"]
@@ -3597,6 +3597,7 @@ project(":ouch") {
 	dependencies {
 		implementation project(":anotherworld")
 		implementation project(":ambiance")
+		implementation project(":onlyfun")
 		implementation project(":sanctuary")
 	}
 }
@@ -3637,7 +3638,7 @@ project(":onlyfun") {
 
 	tasks.register("verifyOnlyFun") {
 		group = "verification"
-		description = "Checks Only Fun alpha.21, including the historical Abjection server actions."
+		description = "Checks Only Fun alpha.22, including its public Abjection projectile contract."
 		inputs.files(fileTree("src/main/java"))
 		inputs.files(fileTree("src/main/resources"))
 		inputs.file(file("art/shop/shop_catalog_editable.csv"))
@@ -3731,7 +3732,7 @@ project(":onlyfun") {
 			def shitCubeRecipe = new JsonSlurper().parse(file(
 				"src/main/resources/data/abjection/recipe/shit_cube.json"))
 			if (manifest.custom.sanctuary26.data_version != 2
-				|| project.version.toString() != "0.0.0-alpha.21"
+				|| project.version.toString() != "0.0.0-alpha.22"
 				|| manifest.depends?.sanctuary != "*"
 				|| manifest.provides != ["abjection"]
 				|| manifest.custom.sanctuary26.network_protocol != 2
@@ -3744,6 +3745,9 @@ project(":onlyfun") {
 				|| !javaText.contains('ServerPlayConnectionEvents.DISCONNECT')
 				|| !javaText.contains('new ItemStack(AbjectionRegistries.SHIT_BALL)')
 				|| !javaText.contains('BlockBehaviour.Properties.ofFullCopy(Blocks.MUD)')
+				|| !javaText.contains('class ShitBallItem extends Item implements ProjectileItem')
+				|| !javaText.contains('public static void registerFactory(Factory implementation)')
+				|| !javaText.contains('return AbjectionProjectileApi.create(level, position, stack, direction)')
 				|| shitCubeTexture == null || shitCubeTexture.width != 16 || shitCubeTexture.height != 16
 				|| shitBallTexture == null || shitBallTexture.width != 16 || shitBallTexture.height != 16
 				|| shitCubeRecipe.key?.get("#") != "abjection:shit_ball"
@@ -4171,7 +4175,7 @@ tasks.register("verifyShopPricingLayoutRelease") {
 		def release = new JsonSlurper().parse(file("pack/release.json"))
 		def index = new JsonSlurper().parse(file("pack/prism/modrinth.index.json"))
 		if (rootProject.pack_version != "26.2.0-alpha.209"
-			|| rootProject.onlyfun_version != "0.0.0-alpha.21"
+			|| rootProject.onlyfun_version != "0.0.0-alpha.22"
 			|| rootProject.sanctuary_version != "0.0.0-alpha.117"
 			|| release.pack_version != rootProject.pack_version || index.versionId != rootProject.pack_version
 			|| migration.source?.pack_version != "26.2.0-alpha.192"
@@ -4265,7 +4269,7 @@ tasks.register("verifyShopCsvBossGatesRelease") {
 		def catalog = file("onlyfun/src/main/java/fr/koka99cab/sanctuary26/onlyfun/shop/OnlyFunShopCatalog.java").text
 		def offerCatalog = file("sanctuary/src/main/java/fr/koka99cab/sanctuary26/sanctuary/shop/ShopOfferCatalog.java").text
 		if (rootProject.pack_version != "26.2.0-alpha.209"
-			|| rootProject.onlyfun_version != "0.0.0-alpha.21"
+			|| rootProject.onlyfun_version != "0.0.0-alpha.22"
 			|| rootProject.sanctuary_version != "0.0.0-alpha.117"
 			|| release.pack_version != rootProject.pack_version || index.versionId != rootProject.pack_version
 			|| migration.source?.pack_version != "26.2.0-alpha.194"
@@ -4513,7 +4517,7 @@ tasks.register("verifyWeatherTntAmbianceRelease") {
 		def rootBuild = file("build.gradle").text
 		if (rootProject.pack_version != "26.2.0-alpha.209"
 			|| rootProject.ambiance_version != "0.0.0-alpha.14"
-			|| rootProject.ouch_version != "0.0.0-alpha.9"
+			|| rootProject.ouch_version != "0.0.0-alpha.10"
 			|| migration.source?.pack_version != "26.2.0-alpha.199"
 			|| migration.source?.modules != [ambiance: "0.0.0-alpha.11", ouch: "0.0.0-alpha.8"]
 			|| migration.target?.pack_version != "26.2.0-alpha.200"
@@ -5533,7 +5537,7 @@ tasks.register("verifyCanapliaAlpha209Release") {
 		if (rootProject.pack_version != "26.2.0-alpha.209"
 			|| rootProject.ambiance_version != expectedTarget.ambiance
 			|| rootProject.itsalive_version != "0.0.0-alpha.35"
-			|| rootProject.onlyfun_version != "0.0.0-alpha.21"
+			|| rootProject.onlyfun_version != "0.0.0-alpha.22"
 			|| migration.source?.pack_version != "26.2.0-alpha.207"
 			|| migration.source?.modules != expectedSource
 			|| migration.target?.pack_version != "26.2.0-alpha.208"
diff --git a/gradle.properties b/gradle.properties
index 9a3548f..7bff6f5 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -20,13 +20,13 @@ anotherworld_version=0.0.0-alpha.55
 anotherworld_lifecycle=active
 itsalive_version=0.0.0-alpha.35
 itsalive_lifecycle=active
-ouch_version=0.0.0-alpha.9
+ouch_version=0.0.0-alpha.10
 ouch_lifecycle=active
 masterkey_version=0.0.0-alpha.8
 masterkey_lifecycle=active
 iliketomoveit_version=0.0.0-alpha.15
 iliketomoveit_lifecycle=active
-onlyfun_version=0.0.0-alpha.21
+onlyfun_version=0.0.0-alpha.22
 onlyfun_lifecycle=active
 sanctuary_version=0.0.0-alpha.117
 sanctuary_lifecycle=active
diff --git a/onlyfun/ABJECTION.md b/onlyfun/ABJECTION.md
index 65cf2ba..c07513e 100644
--- a/onlyfun/ABJECTION.md
+++ b/onlyfun/ABJECTION.md
@@ -19,3 +19,11 @@ sauvegardé et est supprimé à la mort, au passage spectateur ou à la déconne
 Le bloc `abjection:shit_cube` reprend les propriétés de la boue, l’apparence 16×16, la recette
 neuf boules, le butin et l’outil pelle historiques. Les textes sont disponibles en français,
 anglais et russe. Only Fun reste en données v2 et protocole réseau 2 pour ABJ-01.
+
+## ABJ-02 — projectile Ouch
+
+Only Fun expose l’objet et le point d’installation `AbjectionProjectileApi`. Ouch, qui dépend
+explicitement d’Only Fun sans cycle inverse, enregistre le type d’entité sous le même ID historique
+`abjection:shit_ball` et installe la fabrique commune au lancer manuel et au dispenser. Le
+projectile mesure 0,25 bloc, consomme une unité hors créatif, joue le son de boue à l’impact et
+ajoute sept secondes à la nausée déjà présente sans dupliquer d’objet.
diff --git a/onlyfun/src/main/java/fr/koka99cab/sanctuary26/onlyfun/abjection/AbjectionRegistries.java b/onlyfun/src/main/java/fr/koka99cab/sanctuary26/onlyfun/abjection/AbjectionRegistries.java
index 63d4e2c..73126f8 100644
--- a/onlyfun/src/main/java/fr/koka99cab/sanctuary26/onlyfun/abjection/AbjectionRegistries.java
+++ b/onlyfun/src/main/java/fr/koka99cab/sanctuary26/onlyfun/abjection/AbjectionRegistries.java
@@ -18,7 +18,7 @@ public final class AbjectionRegistries {
 	public static final Block SHIT_CUBE = registerBlock("shit_cube", Block::new,
 		BlockBehaviour.Properties.ofFullCopy(Blocks.MUD));
 	public static final Item SHIT_BALL = registerItem("shit_ball",
-		properties -> new Item(properties.stacksTo(16).useItemDescriptionPrefix()));
+		properties -> new ShitBallItem(properties.stacksTo(16).useItemDescriptionPrefix()));
 	public static final Item SHIT_CUBE_ITEM = registerBlockItem("shit_cube", SHIT_CUBE);
 
 	private AbjectionRegistries() {
diff --git a/onlyfun/src/main/java/fr/koka99cab/sanctuary26/onlyfun/abjection/ShitBallItem.java b/onlyfun/src/main/java/fr/koka99cab/sanctuary26/onlyfun/abjection/ShitBallItem.java
new file mode 100644
index 0000000..b835186
--- /dev/null
+++ b/onlyfun/src/main/java/fr/koka99cab/sanctuary26/onlyfun/abjection/ShitBallItem.java
@@ -0,0 +1,22 @@
+package fr.koka99cab.sanctuary26.onlyfun.abjection;
+
+import fr.koka99cab.sanctuary26.onlyfun.api.abjection.AbjectionProjectileApi;
+import net.minecraft.core.Direction;
+import net.minecraft.core.Position;
+import net.minecraft.world.entity.projectile.Projectile;
+import net.minecraft.world.item.Item;
+import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.item.ProjectileItem;
+import net.minecraft.world.level.Level;
+
+/** Historical item identity with a projectile contract implemented by the owning Ouch module. */
+public final class ShitBallItem extends Item implements ProjectileItem {
+	public ShitBallItem(Properties properties) {
+		super(properties);
+	}
+
+	@Override
+	public Projectile asProjectile(Level level, Position position, ItemStack stack, Direction direction) {
+		return AbjectionProjectileApi.create(level, position, stack, direction);
+	}
+}
diff --git a/onlyfun/src/main/java/fr/koka99cab/sanctuary26/onlyfun/api/abjection/AbjectionItems.java b/onlyfun/src/main/java/fr/koka99cab/sanctuary26/onlyfun/api/abjection/AbjectionItems.java
new file mode 100644
index 0000000..7c3f708
--- /dev/null
+++ b/onlyfun/src/main/java/fr/koka99cab/sanctuary26/onlyfun/api/abjection/AbjectionItems.java
@@ -0,0 +1,19 @@
+package fr.koka99cab.sanctuary26.onlyfun.api.abjection;
+
+import fr.koka99cab.sanctuary26.onlyfun.abjection.AbjectionRegistries;
+import net.minecraft.world.item.Item;
+import net.minecraft.world.item.ItemStack;
+
+/** Minimal public object contract consumed by Ouch's Abjection projectile implementation. */
+public final class AbjectionItems {
+	private AbjectionItems() {
+	}
+
+	public static Item shitBall() {
+		return AbjectionRegistries.SHIT_BALL;
+	}
+
+	public static boolean isShitBall(ItemStack stack) {
+		return stack.is(AbjectionRegistries.SHIT_BALL);
+	}
+}
diff --git a/onlyfun/src/main/java/fr/koka99cab/sanctuary26/onlyfun/api/abjection/AbjectionProjectileApi.java b/onlyfun/src/main/java/fr/koka99cab/sanctuary26/onlyfun/api/abjection/AbjectionProjectileApi.java
new file mode 100644
index 0000000..4cb07b1
--- /dev/null
+++ b/onlyfun/src/main/java/fr/koka99cab/sanctuary26/onlyfun/api/abjection/AbjectionProjectileApi.java
@@ -0,0 +1,39 @@
+package fr.koka99cab.sanctuary26.onlyfun.api.abjection;
+
+import java.util.Objects;
+import net.minecraft.core.Direction;
+import net.minecraft.core.Position;
+import net.minecraft.world.entity.projectile.Projectile;
+import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.level.Level;
+
+/**
+ * Owner-neutral projectile factory contract: Only Fun owns the item, while Ouch installs its
+ * combat implementation without creating a reverse dependency.
+ */
+public final class AbjectionProjectileApi {
+	@FunctionalInterface
+	public interface Factory {
+		Projectile create(Level level, Position position, ItemStack stack, Direction direction);
+	}
+
+	private static Factory factory;
+
+	private AbjectionProjectileApi() {
+	}
+
+	public static void registerFactory(Factory implementation) {
+		Objects.requireNonNull(implementation, "implementation");
+		if (factory != null) throw new IllegalStateException("Abjection projectile factory already registered");
+		factory = implementation;
+	}
+
+	public static Projectile create(Level level, Position position, ItemStack stack, Direction direction) {
+		if (factory == null) throw new IllegalStateException("Ouch has not registered the Abjection projectile factory");
+		return factory.create(level, position, stack, direction);
+	}
+
+	public static boolean isReady() {
+		return factory != null;
+	}
+}
diff --git a/ouch/build.gradle b/ouch/build.gradle
index 4f85b23..eac4fed 100644
--- a/ouch/build.gradle
+++ b/ouch/build.gradle
@@ -12,9 +12,10 @@ def miningRifleTextureHash = "4e4295c5c8a8f71d03307809448ff64363eec2d2aefdc538c4
 
 tasks.register("verifyOuch") {
 	group = "verification"
-	description = "Checks Ouch alpha.9, including the Ambiance-backed Weather TNT and migrated Gunz arsenal."
+	description = "Checks Ouch alpha.10, including the shared Abjection projectile implementation."
 	inputs.files(fileTree("src/main/java"))
 	inputs.files(fileTree("src/main/resources"))
+	inputs.files(rootProject.fileTree("onlyfun/src/main/java"))
 	inputs.file(rootProject.file("pack/migrations/26.1.2-gunz-to-26.2.0-alpha.41.json"))
 	inputs.file(rootProject.file("pack/migrations/26.2.0-alpha.99-canon-weather-ownership-to-alpha.100.json"))
 	inputs.file(rootProject.file("pack/migrations/26.2.0-alpha.184-silver-engineering-to-alpha.185.json"))
@@ -25,6 +26,32 @@ tasks.register("verifyOuch") {
 		def weatherRegistry = file("src/main/java/fr/koka99cab/sanctuary26/ouch/registry/OuchWeatherTnt.java").text
 		def weatherEntity = file("src/main/java/fr/koka99cab/sanctuary26/ouch/entity/WeatherTntEntity.java").text
 		def manifest = new JsonSlurper().parse(file("src/main/resources/fabric.mod.json"))
+		def abjectionRegistry = file(
+			"src/main/java/fr/koka99cab/sanctuary26/ouch/registry/OuchAbjectionProjectiles.java").text
+		def abjectionEntity = file(
+			"src/main/java/fr/koka99cab/sanctuary26/ouch/entity/ShitBallEntity.java").text
+		def abjectionClient = file(
+			"src/main/java/fr/koka99cab/sanctuary26/ouch/client/OuchClient.java").text
+		def onlyFunProjectileApi = rootProject.file(
+			"onlyfun/src/main/java/fr/koka99cab/sanctuary26/onlyfun/api/abjection/AbjectionProjectileApi.java").text
+		if (manifest.depends?.onlyfun != ">=0.0.0-alpha.22"
+			|| manifest.custom?.sanctuary26?.data_version != 1
+			|| manifest.custom?.sanctuary26?.network_protocol != 1
+			|| !rootProject.file("build.gradle").text.contains('implementation project(":onlyfun")')
+			|| !onlyFunProjectileApi.contains("public interface Factory")
+			|| !abjectionRegistry.contains('AbjectionProjectileApi.registerFactory(')
+			|| !abjectionRegistry.contains('DispenserBlock.registerProjectileBehavior(AbjectionItems.shitBall())')
+			|| !abjectionRegistry.contains('UseItemCallback.EVENT.register')
+			|| !abjectionRegistry.contains('stack.consume(1, player)')
+			|| !abjectionRegistry.contains('Projectile.spawnProjectileFromRotation(')
+			|| !abjectionRegistry.contains('.sized(0.25F, 0.25F)')
+			|| !abjectionEntity.contains('NAUSEA_DURATION_TICKS = 7 * 20')
+			|| !abjectionEntity.contains('current == null ? 0 : current.getDuration()')
+			|| !abjectionEntity.contains('SoundEvents.MUD_PLACE')
+			|| !abjectionEntity.contains('discard()')
+			|| !abjectionClient.contains('new ThrownItemRenderer<>(context)')) {
+			throw new GradleException("Ouch alpha.10 Abjection projectile contract is incomplete")
+		}
 		if (!itemRegistry.contains("MIGRATED_WEAPONS = List.of(CREEPERLOCK, MITRAILLETTE, EXPULSEUR, ASPIRATEUR)")
 			|| !itemRegistry.contains("WEAPONS = List.of(CREEPERLOCK, MITRAILLETTE, EXPULSEUR, ASPIRATEUR, MINING_RIFLE, BETA_BOW)")
 			|| !creativeTab.contains('OuchMod.id("arsenal")')
@@ -89,7 +116,7 @@ tasks.register("verifyOuch") {
 		def creeperlockRecipe = new JsonSlurper().parse(file("src/main/resources/data/ouch/recipe/creeperlock.json"))
 		def silverEngineeringMigration = new JsonSlurper().parse(rootProject.file(
 			"pack/migrations/26.2.0-alpha.184-silver-engineering-to-alpha.185.json"))
-		if (project.version.toString() != "0.0.0-alpha.9"
+		if (project.version.toString() != "0.0.0-alpha.10"
 			|| mitrailletteRecipe.pattern != ["RRP", "IGI", " B "]
 			|| mitrailletteRecipe.key != [B: "minecraft:stone_button", G: "minecraft:redstone",
 				I: "anotherworld:silver_ingot", P: "anotherworld:silver_plate", R: "anotherworld:silver_rod"]
@@ -317,10 +344,23 @@ tasks.register("verifyOuch") {
 			throw new GradleException("Runtime Ouch resources must not re-register the legacy gunz namespace: ${forbiddenNamespaceReferences}")
 		}
 
-		logger.lifecycle("Ouch verified: 6 enchantable items, 4 custom enchantments, debuffed bases, shared headshots, 6 recipes and FR/EN/RU translations.")
+		logger.lifecycle("Ouch verified: arsenal, Weather TNT and shared Abjection projectile contract.")
 	}
 }
 
+tasks.named("test") {
+	failOnNoDiscoveredTests = false
+}
+
+tasks.register("shitBallContractSmoke", JavaExec) {
+	group = "verification"
+	description = "Checks additive and overflow-safe Shit Ball nausea."
+	dependsOn tasks.named("testClasses")
+	classpath = sourceSets.test.runtimeClasspath
+	mainClass = "fr.koka99cab.sanctuary26.ouch.entity.ShitBallContractSmoke"
+}
+
 tasks.named("check") {
+	dependsOn tasks.named("shitBallContractSmoke")
 	dependsOn tasks.named("verifyOuch")
 }
diff --git a/ouch/src/main/java/fr/koka99cab/sanctuary26/ouch/client/OuchClient.java b/ouch/src/main/java/fr/koka99cab/sanctuary26/ouch/client/OuchClient.java
index 96d53db..3dd5d8f 100644
--- a/ouch/src/main/java/fr/koka99cab/sanctuary26/ouch/client/OuchClient.java
+++ b/ouch/src/main/java/fr/koka99cab/sanctuary26/ouch/client/OuchClient.java
@@ -2,16 +2,20 @@ package fr.koka99cab.sanctuary26.ouch.client;
 
 import fr.koka99cab.sanctuary26.ouch.OuchMod;
 import fr.koka99cab.sanctuary26.ouch.entity.WeatherTntEntity;
+import fr.koka99cab.sanctuary26.ouch.registry.OuchAbjectionProjectiles;
 import fr.koka99cab.sanctuary26.ouch.registry.OuchWeatherTnt;
 import net.fabricmc.api.ClientModInitializer;
 import net.fabricmc.fabric.api.client.rendering.v1.EntityRendererRegistry;
 import net.minecraft.client.renderer.entity.EntityRenderer;
 import net.minecraft.client.renderer.entity.TntRenderer;
+import net.minecraft.client.renderer.entity.ThrownItemRenderer;
 import net.minecraft.world.entity.EntityType;
 
 public final class OuchClient implements ClientModInitializer {
 	@Override
 	public void onInitializeClient() {
+		EntityRendererRegistry.register(OuchAbjectionProjectiles.ENTITY,
+			context -> new ThrownItemRenderer<>(context));
 		registerWeatherRenderer(OuchWeatherTnt.ENTITY);
 		registerWeatherRenderer(OuchWeatherTnt.REDSTONER_COMPAT_ENTITY);
 		registerWeatherRenderer(OuchWeatherTnt.LEGACY_ENTITY);
diff --git a/ouch/src/main/java/fr/koka99cab/sanctuary26/ouch/entity/ShitBallEntity.java b/ouch/src/main/java/fr/koka99cab/sanctuary26/ouch/entity/ShitBallEntity.java
new file mode 100644
index 0000000..f0168e4
--- /dev/null
+++ b/ouch/src/main/java/fr/koka99cab/sanctuary26/ouch/entity/ShitBallEntity.java
@@ -0,0 +1,62 @@
+package fr.koka99cab.sanctuary26.ouch.entity;
+
+import fr.koka99cab.sanctuary26.onlyfun.api.abjection.AbjectionItems;
+import fr.koka99cab.sanctuary26.ouch.registry.OuchAbjectionProjectiles;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.sounds.SoundEvents;
+import net.minecraft.sounds.SoundSource;
+import net.minecraft.world.effect.MobEffectInstance;
+import net.minecraft.world.effect.MobEffects;
+import net.minecraft.world.entity.EntityType;
+import net.minecraft.world.entity.LivingEntity;
+import net.minecraft.world.entity.projectile.throwableitemprojectile.ThrowableItemProjectile;
+import net.minecraft.world.item.Item;
+import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.level.Level;
+import net.minecraft.world.phys.EntityHitResult;
+import net.minecraft.world.phys.HitResult;
+
+/** Server-authoritative historical Abjection projectile, owned by Ouch. */
+public final class ShitBallEntity extends ThrowableItemProjectile {
+	public static final int NAUSEA_DURATION_TICKS = 7 * 20;
+
+	public ShitBallEntity(EntityType<? extends ShitBallEntity> type, Level level) {
+		super(type, level);
+	}
+
+	public ShitBallEntity(Level level, LivingEntity owner, ItemStack stack) {
+		super(OuchAbjectionProjectiles.ENTITY, owner, level, stack.copyWithCount(1));
+	}
+
+	public ShitBallEntity(Level level, double x, double y, double z, ItemStack stack) {
+		super(OuchAbjectionProjectiles.ENTITY, x, y, z, level, stack.copyWithCount(1));
+	}
+
+	@Override
+	protected Item getDefaultItem() {
+		return AbjectionItems.shitBall();
+	}
+
+	@Override
+	protected void onHitEntity(EntityHitResult hit) {
+		super.onHitEntity(hit);
+		if (!(level() instanceof ServerLevel) || !(hit.getEntity() instanceof LivingEntity target)) return;
+		MobEffectInstance current = target.getEffect(MobEffects.NAUSEA);
+		int duration = extendedNauseaDuration(current == null ? 0 : current.getDuration());
+		target.addEffect(new MobEffectInstance(MobEffects.NAUSEA, duration), getOwner());
+	}
+
+	@Override
+	protected void onHit(HitResult hit) {
+		super.onHit(hit);
+		if (level() instanceof ServerLevel level) {
+			level.playSound(null, getX(), getY(), getZ(), SoundEvents.MUD_PLACE,
+				SoundSource.PLAYERS, 1.0F, 0.75F);
+			discard();
+		}
+	}
+
+	static int extendedNauseaDuration(int currentDuration) {
+		return (int) Math.min(Integer.MAX_VALUE, Math.max(0L, currentDuration) + NAUSEA_DURATION_TICKS);
+	}
+}
diff --git a/ouch/src/main/java/fr/koka99cab/sanctuary26/ouch/registry/OuchAbjectionProjectiles.java b/ouch/src/main/java/fr/koka99cab/sanctuary26/ouch/registry/OuchAbjectionProjectiles.java
new file mode 100644
index 0000000..4ab641b
--- /dev/null
+++ b/ouch/src/main/java/fr/koka99cab/sanctuary26/ouch/registry/OuchAbjectionProjectiles.java
@@ -0,0 +1,70 @@
+package fr.koka99cab.sanctuary26.ouch.registry;
+
+import fr.koka99cab.sanctuary26.onlyfun.abjection.AbjectionRegistries;
+import fr.koka99cab.sanctuary26.onlyfun.api.abjection.AbjectionItems;
+import fr.koka99cab.sanctuary26.onlyfun.api.abjection.AbjectionProjectileApi;
+import fr.koka99cab.sanctuary26.ouch.entity.ShitBallEntity;
+import net.fabricmc.fabric.api.event.player.UseItemCallback;
+import net.minecraft.core.Direction;
+import net.minecraft.core.Position;
+import net.minecraft.core.Registry;
+import net.minecraft.core.registries.BuiltInRegistries;
+import net.minecraft.core.registries.Registries;
+import net.minecraft.resources.ResourceKey;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.sounds.SoundEvents;
+import net.minecraft.sounds.SoundSource;
+import net.minecraft.stats.Stats;
+import net.minecraft.world.InteractionResult;
+import net.minecraft.world.entity.EntityType;
+import net.minecraft.world.entity.LivingEntity;
+import net.minecraft.world.entity.MobCategory;
+import net.minecraft.world.entity.projectile.Projectile;
+import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.level.Level;
+import net.minecraft.world.level.block.DispenserBlock;
+
+/** Shared manual/dispenser creation path for {@code abjection:shit_ball}. */
+public final class OuchAbjectionProjectiles {
+	private static final float SHOOT_POWER = 1.5F;
+	private static final ResourceKey<EntityType<?>> KEY = ResourceKey.create(
+		Registries.ENTITY_TYPE, AbjectionRegistries.id("shit_ball"));
+	public static final EntityType<ShitBallEntity> ENTITY = Registry.register(
+		BuiltInRegistries.ENTITY_TYPE, KEY,
+		EntityType.Builder.<ShitBallEntity>of(ShitBallEntity::new, MobCategory.MISC)
+			.sized(0.25F, 0.25F).clientTrackingRange(4).updateInterval(10).build(KEY));
+	private static boolean initialized;
+
+	private OuchAbjectionProjectiles() {
+	}
+
+	public static void initialize() {
+		if (initialized) return;
+		initialized = true;
+		AbjectionProjectileApi.registerFactory(OuchAbjectionProjectiles::createFromDispenser);
+		DispenserBlock.registerProjectileBehavior(AbjectionItems.shitBall());
+		UseItemCallback.EVENT.register((player, level, hand) -> {
+			ItemStack stack = player.getItemInHand(hand);
+			if (!AbjectionItems.isShitBall(stack) || player.isSpectator()) return InteractionResult.PASS;
+			if (level.isClientSide()) return InteractionResult.SUCCESS;
+			if (!(level instanceof ServerLevel serverLevel)) return InteractionResult.FAIL;
+			serverLevel.playSound(null, player.getX(), player.getY(), player.getZ(),
+				SoundEvents.SNOWBALL_THROW, SoundSource.NEUTRAL, 0.5F,
+				0.4F / (serverLevel.getRandom().nextFloat() * 0.4F + 0.8F));
+			Projectile.spawnProjectileFromRotation(OuchAbjectionProjectiles::createFromPlayer,
+				serverLevel, stack, player, 0.0F, SHOOT_POWER, 1.0F);
+			player.awardStat(Stats.ITEM_USED.get(AbjectionItems.shitBall()));
+			stack.consume(1, player);
+			return InteractionResult.SUCCESS_SERVER;
+		});
+	}
+
+	public static ShitBallEntity createFromPlayer(ServerLevel level, LivingEntity owner, ItemStack stack) {
+		return new ShitBallEntity(level, owner, stack);
+	}
+
+	public static Projectile createFromDispenser(Level level, Position position, ItemStack stack,
+		Direction direction) {
+		return new ShitBallEntity(level, position.x(), position.y(), position.z(), stack);
+	}
+}
diff --git a/ouch/src/main/java/fr/koka99cab/sanctuary26/ouch/registry/OuchRegistries.java b/ouch/src/main/java/fr/koka99cab/sanctuary26/ouch/registry/OuchRegistries.java
index 276277c..2352350 100644
--- a/ouch/src/main/java/fr/koka99cab/sanctuary26/ouch/registry/OuchRegistries.java
+++ b/ouch/src/main/java/fr/koka99cab/sanctuary26/ouch/registry/OuchRegistries.java
@@ -19,6 +19,7 @@ public final class OuchRegistries {
 		initialized = true;
 		OuchItems.initialize();
 		OuchWeatherTnt.initialize();
+		OuchAbjectionProjectiles.initialize();
 		OuchCreativeTab.initialize();
 		OuchMod.LOGGER.debug("[{}] Weapon registry hub initialized.", OuchMod.DISPLAY_NAME);
 	}
diff --git a/ouch/src/main/resources/fabric.mod.json b/ouch/src/main/resources/fabric.mod.json
index 6a18936..7f9bfe0 100644
--- a/ouch/src/main/resources/fabric.mod.json
+++ b/ouch/src/main/resources/fabric.mod.json
@@ -25,6 +25,7 @@
 		"fabric-api": ">=0.154.2+26.2",
 		"anotherworld": ">=0.0.0-alpha.46",
 		"ambiance": ">=0.0.0-alpha.12",
+		"onlyfun": ">=0.0.0-alpha.22",
 		"sanctuary": ">=0.0.0-alpha.110"
 	},
 	"custom": {
diff --git a/ouch/src/test/java/fr/koka99cab/sanctuary26/ouch/entity/ShitBallContractSmoke.java b/ouch/src/test/java/fr/koka99cab/sanctuary26/ouch/entity/ShitBallContractSmoke.java
new file mode 100644
index 0000000..878afcd
--- /dev/null
+++ b/ouch/src/test/java/fr/koka99cab/sanctuary26/ouch/entity/ShitBallContractSmoke.java
@@ -0,0 +1,27 @@
+package fr.koka99cab.sanctuary26.ouch.entity;
+
+import net.minecraft.SharedConstants;
+import net.minecraft.server.Bootstrap;
+
+/** Executable regression test for additive and overflow-safe nausea duration. */
+public final class ShitBallContractSmoke {
+	private ShitBallContractSmoke() {
+	}
+
+	public static void main(String[] args) {
+		SharedConstants.tryDetectVersion();
+		Bootstrap.bootStrap();
+		require(ShitBallEntity.NAUSEA_DURATION_TICKS == 140, "historical duration changed");
+		require(ShitBallEntity.extendedNauseaDuration(0) == 140, "first hit duration is wrong");
+		require(ShitBallEntity.extendedNauseaDuration(60) == 200,
+			"a new impact did not add seven seconds");
+		require(ShitBallEntity.extendedNauseaDuration(-10) == 140,
+			"negative input was not normalized");
+		require(ShitBallEntity.extendedNauseaDuration(Integer.MAX_VALUE) == Integer.MAX_VALUE,
+			"duration overflow was not saturated");
+	}
+
+	private static void require(boolean condition, String message) {
+		if (!condition) throw new AssertionError(message);
+	}
+}
-- 
2.54.0