Debugify NeoForge 1.21.1 — Changelog

1.21.1+1.1 (Initial NeoForge Release)

Added

• NeoForge 1.21.1 port of isXander's Debugify (upstream Fabric archive/1.21 branch).
• 58 bug fixes from the Mojang bug tracker across two categories:
  • Basic Fixes (26 server + 29 client) — Safe, non-intrusive fixes including:
    • MC-2025: Entity hitbox floating-point inaccuracy on chunk load
    • MC-7569: RCON output missing newlines between messages
    • MC-224729: Chunks not saved during /save-all if never accessed
    • MC-119417, MC-129909, MC-215530, MC-69216: Spectator mode edge cases (sleeping, item use, frozen state, fishing hook)
    • MC-135971: Ctrl+Q not emptying crafting result slot
    • MC-100991: Fishing hook damage not recorded in combat tracker
    • MC-237493: Telemetry disable option in telemetry menu
    • MC-199467: Sin/cos integer overflow causing entity jitter
    • MC-223153: Copper blocks missing sounds
    • MC-93384: Drowning bubbles spawning at feet instead of eye level
    • MC-121706: Bow-wielding mobs not looking at their target
    • MC-132878: Armor stands not spawning break particles
    • MC-179072: Creepers igniting on non-enemy entities
    • MC-200418: Baby villagers not dismounting chickens on conversion
    • MC-160095: Cactus breaking wrong block vs piston head
    • MC-155509: Dead pufferfish still stinging
    • MC-79545: XP level not clamped at integer limit
    • ...and many more
  • Gameplay Fixes (3) — Fixes that alter gameplay mechanics:
    • MC-12829: Spectator/flying players can climb ladders (client)
    • MC-231097: Client sends "release using item" packet on drop (client)
    • MC-8187: 2x2 sapling placement offset at map edges (server)
• Smart conflict detection — Mixin error handler detects injection targets already fixed by NeoForge or another mod and skips gracefully instead of crashing. Startup log reports enabled, skipped, and failed fix counts.
• NeoForge-native config screen — In-game configuration accessible from the Mods menu, with per-fix toggles and "Enable In Multiplayer" gate for gameplay fixes.
• Persistent configuration — Settings saved to config/debugify.json.
• Mod conflict detection — Automatically disables fixes that conflict with Carpet, Carpet-Fixes, ChunkSavingFix, Ctrl-Q, flwr-8187, MCMouser, No Telemetry, Title-Fix, and NeoForge itself where it already ships the same fix.
• Client/server independence — Client and server can run Debugify independently without requiring it on both sides.
• Multi-language support — English, Greek, French, Italian, Portuguese (Brazil), Russian, Turkish, Ukrainian, Chinese (Simplified & Traditional).
• Third-party conflict API — Other mods can ask Debugify to disable specific fixes via [modproperties.debugify] in their own neoforge.mods.toml (replaces upstream's Fabric entrypoint API).

Changed

• Ported all Fabric-specific code to NeoForge equivalents:
  • FabricLoader → ModList / LoadingModList / FMLPaths
  • Fabric entrypoints → @Mod / NeoForge IConfigScreenFactory
  • Fabric access widener → META-INF/accesstransformer.cfg
  • YACL/Mod Menu config → custom NeoForge config screen
  • Flattened src/client into src/main (single source set, client classes behind dist = Dist.CLIENT)
  • fabric.mod.json → neoforge.mods.toml
• Uses NeoForge-bundled MixinExtras (mixinextras-neoforge).

Fixed (NeoForge Patch Adaptations)

NeoForge rewrites parts of vanilla bytecode, so several upstream mixins needed retargeting:

• MC-93384: Vanilla's LivingEntity#baseTick bubble code is dead under NeoForge (if (false)); the bug moved to CommonHooks#onLivingBreathe. Retargeted there via @Redirect.
• MC-577: mouseClicked local-variable table shifted by NeoForge's patch; dropped local capture, recomputes hovered slot via @Invoker.
• MC-121706: mob field erases to Mob under NeoForge generics; shadow retyped and lookAt retargeted.
• MC-176559: Marked as conflicting with neoforge — NeoForge's ItemStack#shouldCauseBlockBreakReset already ignores the DAMAGE component for damageable items, so the fix ships in NeoForge itself.
• Mixin compatibility: isModLoaded now falls back to LoadingModList so modConflicts actually resolve during mixin loading (previously every conflict silently returned false).
• Fixed upstream lang-key typo mc_176559 → mc-176559.

Verified

• gradlew build produces debugify-1.21.1+1.1.jar.
• Client: boots to title screen and joins a singleplayer world with zero mixin errors; plays in-world cleanly.
• Dedicated server: boots clean, all common mixins apply, no client classes loaded.
• All @Shadow/@Invoker/@Accessor members and method= selectors verified against the patched NeoForge runtime.

Requirements

• Minecraft 1.21.1
• NeoForge 21.1.x (tested on 21.1.251)
• Java 21

Credits

• Original mod: isXander — Debugify (Fabric)
• NeoForge port: MikihinaSann
• Code used under LGPLv3: j-Tai's TieFix, FlashyReese's Sodium Extra
• Code used under Zlib: Ampflower's 2x2 Surrounded Saplings Fix (MC-8187)

License

LGPLv3