A cow summoned with max_health and movement_speed bases, and a zombie
with an attack_damage base and a saved Health, against vanilla.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
/random reset * in the ticking group counted 12 sequences in vanilla against Horizon's 11 on one CI run (#1585).
Locally 1 oracle run in 24 did the same, and its extra sequence was minecraft:entities/bat. Before the setup's
gamerules (spawn_mobs and mob_drops off), the oracle ticks until the entities around the player have loaded, a
number of ticks that depends on the machine; mobs spawn meanwhile, and a bat that died then rolled its loot table.
Once mob_drops is off no mob death rolls one (LivingEntity.shouldDropLoot), so the setup now ends with an
unrecorded /random reset *: every run starts the script with no sequence, and the later count holds only what the
corpus itself rolled.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Reuse stop_riding before applying a player teleport destination so the riding tick cannot return the player to the vehicle. Add vanilla command parity and both-mode LAN regressions for mounted teleports.
Co-Authored-By: OpenCode gpt-6.1-sol <noreply@openai.com>
A mounted mob answered "Found no elements matching Passengers": the command
built the entity with the flat serializer, so `Passengers` was never in the
tag, even though the game had the relationship and saving a world kept it.
Persistence already writes the tree (`Game::mob_tree_nbt`, which also carries
the leash), and vanilla's command path uses the same one, so the command reads
it now.
Fixes#1519.
Co-Authored-By: Hermes Agent (Nous Research) <noreply@nousresearch.com>
The comment names vanilla's rule (LevelChunk.setBlockState keeps or creates
the block entity when the block, not the state, is still there after
onPlace). The corpus checks the `enabled=false` flip, drops the cleanup lines
the group's closing /fill already does, and adds a powered hopper placed by
/fill, which goes through the same place_state.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
/setblock created the block entity only when the state that landed matched the
requested state exactly. HopperBlock.onPlace sets enabled=false while the block is
being placed, so a hopper put into power had no inventory: /data get block answered
"not a block entity", items dropped into it stayed item entities, and
/setblock hopper{Items:[...]} dropped the NBT as well.
Compare the block at the position with the block that was placed, the way vanilla
does when it creates the entity from the placed state, before the neighbour updates
run.
Fixes#1506.
Co-Authored-By: Hermes Agent (Nous Research) <noreply@nousresearch.com>
Primed TNT (and falling blocks, projectiles) spawned from /summon get
their entity id only when first tracked, so the summon found no new id
and answered "Unable to summon entity" though the entity was there and
went off. The summon now also counts those lists, and names the type:
"Summoned new Primed TNT", as vanilla.
Test: a TNT summon in the command execution corpus (world group:
125/126 match vanilla; the one left, /waypoint list, was there before).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
(cherry picked from commit dd733684bc8a2efca2b2fa76fc54d6eb48608103)
The relative-dimension check teleported the player from the Nether's
80 100 -40 to the overworld's 644 100 -316, fresh ocean chunks at seed 1.
On some runs vanilla broke some of their kelp and seagrass while they
loaded (its chunk loading is asynchronous), which rolled those blocks'
loot tables, so /random reset * later counted 12 or 13 sequences
against Horizon's 11. 1 230 0 in the Nether lands at 12 230 4, terrain
loaded since the start: the scaling is still checked, and 10 runs in a
row pass (5 of the 16 runs before failed this way).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Coming back to a level, the entities saved with its chunks wait in
World::loaded_entities until the next tick spawns them, as vanilla's
PersistentEntitySectionManager.processPendingLoads does. /summon pushed its
compound onto that queue and drained all of it, so the first waiting
entity took the id counted as the summon's root: after a Nether round trip
`/summon minecraft:armor_stand ...` reported "Summoned new Pig". Summon now
spawns only its own stack and leaves the queue to the tick.
The command harness's settle now waits for the entities of the chunks
around the player as well, like the oracle's settle
(areEntitiesActuallyLoadedAndTicking), and a `portal` op sends the player
through the nether portal it stands in (Entity.handlePortal:
NetherPortalBlock.getPortalDestination, teleportToPortalDestination). The
corpus's new `levels` group makes the round trip and checks the Overworld's
pig and a summon's feedback on the way back.
Fixes#947
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Context int and float providers (inline or registered) evaluate with
Java's arithmetic, exceptions and rounding, in the default, block or
entity loot context; their codecs report missing fields as
DataFixerUpper does.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Model TestCommand's release tree (ResourceSelectorArgument patterns
included) and its finder, locate, pos, stop and clear outcomes when no
test instance block exists. Compare /help's gamerule alternatives as a
set: GameRuleCommand registers them in identity-hash order.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
/tellraw resolves nbt components; execute in another dimension sees its
chunks unloaded; the built-in pack's predicates load; holders stay
tracked after their objective is removed; new worlds use the offline
profile id of the player.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
/spreadplayers follows SpreadPlayersCommand (safe positions, failure
distance, float centre); /datapack models the built-in, feature and
world packs with their chat links; unknown function tags are empty.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Inline and registered item modifiers now apply (26.3's type-dispatched
functions, set_lore, set_custom_data, set_components, toggle_tooltips,
filtered), counting every set slot like CountingModifier. Item stacks
keep components Horizon does not model, display names follow
ItemStack.getDisplayName, /data prints compounds in CompoundTag's
HashMap order, summoned passengers snap to the position, and living
entities other than the player get vanilla attribute maps (waypoint
transmit range included, tracked as ServerWaypointManager does).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Markers, displays and other unsimulated entity types are now kept as
their saved data at a position, so selectors, /tag, /kill, /tp and
/data reach them. Widen the command execution corpus to every command
the integrated server registers, and keep the oracle's terrain tickets
out of /forceload's view.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Uncommitted changes the agent had in progress when it was stopped; may
not build or pass its harnesses yet.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Uncommitted changes the agent had in progress when it was stopped; may not
build or pass its harnesses yet.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Ludovic Marie
rdbtCVS
Alexander Krylov
LookImEcho-Rick