SyncValsverifier → artifact → classifier → verdict
SyncVals · Trajectory

tile-gradient-particles

claude-code claude-sonnet-4-6 ✗ failed GOOD_FAILURE ↑ View task
Solved from the instruction alone, tests/ and solution/ were withheld from the agent's workspace and restored only for grading.
Reward = tests/test.sh exit code (0 → resolved); the classification below is post-hoc and cannot change it.
Classification , post-hoc; cannot change the reward
GOOD_FAILUREHonest miss, the agent ran correctly but couldn't solve it. Expected for a hard task; the task is sound.
SubtypeTimeout
EvidenceAgent trajectory shows completion of only 1 of 4 required components: world.gd script updates were done, but TileSet custom data layer was never added to world.tscn. Test failure message: "VALIDATION_FAILED: TileSet missing tile_type custom data layer". Agent session was terminated at step 12 with message "You've hit your session limit" after modifying only world.gd script.
Root causeThe agent hit the Claude API session limit after updating world.gd but before modifying the scene files (world.tscn and tank.tscn). The task requires adding a custom data layer to the TileSet, configuring particle emitters, and implementing particle update logic, but the agent ran out of time to complete these steps.
RecommendationN/A - task is fine. The agent encountered an infrastructure timeout (session limit), not a task specification problem. The instruction clearly specifies all required changes and the test correctly validates the TileSet custom data layer requirement.
Trajectory
Tool-by-tool agent trajectory
6 tool calls · 3 tool types · 10 steps
# Track Particles Driven by Tile Type Gradient In `scenes/world.tscn`, add a TileSet custom data layer named `tile_type` with type int, and assign GradientTexture1D exports named `water_color`, `dirt_color`, and `grass_color` on the World node. In `scripts/world.gd`, add `enum TILE_TYPES { NONE, WATER, DIRT, GRASS }`, export the three GradientTexture1D variables (`water_color`, `dirt_color`, `grass_color`), create a dictionary mapping TILE_TYPES enum members to those gradients, and add a static `get_gradient_at(position)` that reads `get_custom_data_at(position, "tile_type")` and returns the matching gradient. In `scenes/tank.tscn`, add `LeftTrackParticles` and `RightTrackParticles` GPUParticles2D nodes configured to produce realistic track dust trails , use box emission, set directional flow in opposite vertical directions for left and right tracks, configure appropriate spread, disable gravity, set reasonable velocity and damping, use small particle scale, set amount and z_index appropriately, and start with emitting disabled. In `scripts/tank.gd`, track the current particle gradient using `World.get_gradient_at(position)`, assign it to each emitter's `process_material.color_ramp`, set both emitters to `emitting = true` while moving, and `emitting = false` when not moving, via a method named `_update_track_particles`.
Let me explore the project structure first.

List all files in the project

shell
find /home/user/task -type f | sort
output
/home/user/task/.godot/.gdignore
/home/user/task/.godot/editor/filesystem_cache10
/home/user/task/.godot/editor/main.tscn-folding-3ad5c15c4f3250da0cc7c1af1770d85f.cfg
/home/user/task/.godot/editor/project_metadata.cfg
/home/user/task/.godot/global_script_class_cache.cfg
/home/user/task/.godot/imported/tank_body.png-a051a2ed122e9e86f36df226d2426b35.ctex
/home/user/task/.godot/imported/tank_body.png-a051a2ed122e9e86f36df226d2426b35.md5
/home/user/task/.godot/imported/terrain.png-dfc2a3dbab29348c6bdbbce57351be83.ctex
/home/user/task/.godot/imported/terrain.png-dfc2a3dbab29348c6bdbbce57351be83.md5
/home/user/task/.godot/scene_groups_cache.cfg
/home/user/task/.godot/uid_cache.bin
/home/user/task/assets/sprites/tank_body.png
/home/user/task/assets/sprites/tank_body.png.import
/home/user/task/assets/sprites/terrain.png
/home/user/task/assets/sprites/terrain.png.import
/home/user/task/project.godot
/home/user/task/scenes/main.tscn
/home/user/task/scenes/tank.tscn
/home/user/task/scenes/test.tscn
/home/user/task/scenes/world.tscn
/home/user/task/scripts/tank.gd
/home/user/task/scripts/tank.gd.uid
/home/user/task/scripts/test.gd
/home/user/task/scripts/test.gd.uid
/home/user/task/scripts/world.gd
/home/user/task/scripts/world.gd.uid

[stdout]
/home/user/task/.godot/.gdignore
/home/user/task/.godot/editor/filesystem_cache10
/home/user/task/.godot/editor/main.tscn-folding-3ad5c15c4f3250da0cc7c1af1770d85f.cfg
/home/user/task/.godot/editor/project_metadata.cfg
/home/user/task/.godot/global_script_class_cache.cfg
/home/user/task/.godot/imported/tank_body.png-a051a2ed122e9e86f36df226d2426b35.ctex
/home/user/task/.godot/imported/tank_body.png-a051a2ed122e9e86f36df226d2426b35.md5
/home/user/task/.godot/imported/terrain.png-dfc2a3dbab29348c6bdbbce57351be83.ctex
/home/user/task/.godot/imported/terrain.png-dfc2a3dbab29348c6bdbbce57351be83.md5
/home/user/task/.godot/scene_groups_cache.cfg
/home/user/task/.godot/uid_cache.bin
/home/user/task/assets/sprites/tank_body.png
/home/user/task/assets/sprites/tank_body.png.import
/home/user/task/assets/sprites/terrain.png
/home/user/task/assets/sprites/terrain.png.import
/home/user/task/project.godot
/home/user/task/scenes/main.tscn
/home/user/task/scenes/tank.tscn
/home/user/task/scenes/test.tscn
/home/user/task/scenes/world.tscn
/home/user/task/scripts/tank.gd
/home/user/task/scripts/tank.gd.uid
/home/user/task/scripts/test.gd
/home/user/task/scripts/test.gd.uid
/home/user/task/scripts/world.gd
/home/user/task/scripts/world.gd.uid

/home/user/task/scenes/world.tscn

contents
1	[gd_scene load_steps=3 format=3 uid="uid://world_start_1218"]
2	
3	[ext_resource type="Script" path="res://scripts/world.gd" id="1_world"]
4	
5	[sub_resource type="TileSet" id="TileSet_world"]
6	
7	[node name="World" type="Node2D"]
8	script = ExtResource("1_world")
9	
10	[node name="TileMap" type="TileMap" parent="."]
11	tile_set = SubResource("TileSet_world")
12	format = 2
13	layer_0/name = "terrain"
14	layer_0/z_index = -10
15

/home/user/task/scenes/tank.tscn

contents
1	[gd_scene load_steps=3 format=3 uid="uid://tank_start_1218"]
2	
3	[ext_resource type="Script" path="res://scripts/tank.gd" id="1_tank_script"]
4	
5	[sub_resource type="RectangleShape2D" id="RectangleShape2D_1"]
6	size = Vector2(26, 26)
7	
8	[node name="Tank" type="CharacterBody2D"]
9	script = ExtResource("1_tank_script")
10	
11	[node name="BodySprite" type="Sprite2D" parent="."]
12	
13	[node name="CollisionShape2D" type="CollisionShape2D" parent="."]
14	shape = SubResource("RectangleShape2D_1")
15

/home/user/task/scripts/world.gd

contents
1	extends Node2D
2	class_name World
3	
4	@onready var tile_map: TileMap = $TileMap
5	
6	static var _instance: World = null
7	
8	func _ready():
9		if _instance == null:
10			_instance = self
11	
12	
13	static func get_tile_data_at(position: Vector2) -> TileData:
14		var local_position: Vector2i = _instance.tile_map.local_to_map(position)
15		return _instance.tile_map.get_cell_tile_data(0, local_position)
16	
17	
18	static func get_custom_data_at(position: Vector2, custom_data_name: String) -> Variant:
19		var data = get_tile_data_at(position)
20		if data == null:
21			return null
22		return data.get_custom_data(custom_data_name)
23

/home/user/task/scripts/tank.gd

contents
1	extends CharacterBody2D
2	class_name Tank
3	
4	const SPEED = 64.0
5	const TURN_SPEED = 2.0
6	
7	var direction := Vector2.RIGHT
8	
9	func _physics_process(delta):
10		var drive_input := 0.0
11		var turn_input := 0.0
12		if InputMap.has_action("move_backward") and InputMap.has_action("move_forward"):
13			drive_input = Input.get_axis("move_backward", "move_forward")
14		if InputMap.has_action("turn_left") and InputMap.has_action("turn_right"):
15			turn_input = Input.get_axis("turn_left", "turn_right")
16		if turn_input != 0.0:
17			direction = direction.rotated(turn_input * (PI / 2.0) * TURN_SPEED * delta)
18			rotation = direction.angle()
19		if drive_input != 0.0:
20			velocity = direction.normalized() * drive_input * SPEED
21		else:
22			velocity = Vector2.ZERO
23		move_and_slide()
24
Now I have a clear picture of the project. I'll make all four changes in order.
write · /home/user/task/scripts/world.gd
extends Node2D
class_name World

enum TILE_TYPES { NONE, WATER, DIRT, GRASS }

@export var water_color: GradientTexture1D
@export var dirt_color: GradientTexture1D
@export var grass_color: GradientTexture1D

@onready var tile_map: TileMap = $TileMap

static var _instance: World = null

var _tile_gradients: Dictionary

func _ready():
	if _instance == null:
		_instance = self
	_tile_gradients = {
		TILE_TYPES.NONE: null,
		TILE_TYPES.WATER: water_color,
		TILE_TYPES.DIRT: dirt_color,
		TILE_TYPES.GRASS: grass_color,
	}


static func get_tile_data_at(position: Vector2) -> TileData:
	var local_position: Vector2i = _instance.tile_map.local_to_map(position)
	return _instance.tile_map.get_cell_tile_data(0, local_position)


static func get_custom_data_at(position: Vector2, custom_data_name: String) -> Variant:
	var data = get_tile_data_at(position)
	if data == null:
		return null
	return data.get_custom_data(custom_data_name)


static func get_gradient_at(position: Vector2) -> GradientTexture1D:
	var tile_type = get_custom_data_at(position, "tile_type")
	if tile_type == null:
		return null
	return _instance._tile_gradients.get(tile_type, null)
You've hit your session limit · resets 12:50am (UTC)
Final diff , what the agent changed

No file changes, the agent left the workspace untouched.

Verifier output , the proof behind the reward
tests/test.sh
Godot Engine v4.4.stable.official.4c311cbee - https://godotengine.org
WARNING: Started the engine as `root`/superuser. This is a security risk, and subsystems like audio may not work correctly.
Set the environment variable `GODOT_SILENCE_ROOT_WARNING` to 1 to silence this warning.
     at: setup2 (main/main.cpp:3181)

VALIDATION_FAILED: TileSet missing tile_type custom data layer
WARNING: 3 RIDs of type "CanvasItem" were leaked.
     at: _free_rids (servers/rendering/renderer_canvas_cull.cpp:2679)
WARNING: ObjectDB instances leaked at exit (run with --verbose for details).
     at: cleanup (core/object/object.cpp:2378)
ERROR: 2 resources still in use at exit (run with --verbose for details).
   at: clear (core/io/resource.cpp:614)

Reproduce this trial: git checkout 2f94510 && PYTHONPATH=src python3 scripts/build_site.py , then open trial/trial_7b13ebfc63104171. Re-running the agent live requires EVAL_PLATFORM_ENABLE_OAUTH_SMOKE=1 and is non-deterministic.

Trial trial_7b13ebfc63104171 · verifier authoritative; classifier explanatory.