SyncValsverifier → artifact → classifier → verdict
SyncVals · Trajectory

car-scene-assembly

claude-code claude-opus-4-8 ✓ resolved GOOD_SUCCESS ↑ 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_SUCCESSLegitimate solve, implements the asked-for behavior; tests verify real functionality.
SubtypeLegitimate Solution - Discovery and Problem-Solving
EvidenceTrial test output shows 'VALIDATION_PASSED: Car scene hierarchy matches tutorial setup' with exit code 0 (reward 1.0). Agent trajectory shows systematic exploration: (1) PNG header analysis to find sprite dimensions and identify forward-facing car body at x=292-359; (2) sprite region selection via opacity profiling (portrait ratio 0.45-0.65); (3) collision shape sizing to match sprite dimensions; (4) discovery that Godot 4.4 Camera2D has no 'current' storage property but tests require is_current()==true; (5) creation of minimal car_camera.gd script calling make_current() in _ready(); (6) successful test validation. Agent's values (region_rect=292,0,68,130 vs reference 291,0,70,133) differ but both satisfy test tolerances (ratio range, position range 270-315, height/radius ±3%).
Root causeAgent successfully solved the task through intelligent exploration of the Godot engine and PNG image structure. The agent discovered that making the Camera2D current requires runtime script execution (Godot 4.4 limitation), implemented a clean solution with a helper script, and validated it passes all test checks including the non-obvious is_current() requirement.
RecommendationN/A - task is fine. However, for future similar tasks, the instruction could explicitly document if runtime script requirements exist beyond pure scene assembly, to avoid agents needing to discover this through trial-and-error testing.
Trajectory
Tool-by-tool agent trajectory
60 tool calls · 3 tool types · 60 steps
# Car Scene Assembly In scenes/car.tscn, keep the CharacterBody2D named Car as the root and add the following hierarchy. Add a Sprite2D as the first child: use res://assets/spritesheet_vehicles.png, enable region cropping to isolate the forward-facing car sprite from the sheet, and rotate it 90° so the car faces forward. Add a CollisionShape2D sibling at the default position with a CapsuleShape2D sized to closely match the car sprite, also rotated 90°. Finally, add a Camera2D child of Car at the origin with no offset.
Read
{
  "file_path": "/home/user/task/scenes/car.tscn"
}
output
1	[gd_scene load_steps=1 format=3 uid="uid://codexcarsetupscene"]
2	
3	[node name="Car" type="CharacterBody2D"]
4
Bash
ls -la /home/user/task/assets/ /home/user/task/scenes/ 2>/dev/null; echo "---"; ls /home/user/task/*.godot 2>/dev/null; echo "---project---"; cat /home/user/task/project.godot 2>/dev/null | head -50

{
  "description": "List assets, scenes, and project config"
}
output
/home/user/task/assets/:
total 108
drwxr-xr-x 2 user user   4096 Jun 21 02:10 .
drwxr-xr-x 6 user user    128 Jun 21 02:10 ..
-rw-r--r-- 1 user user 102392 Jun 20 23:26 spritesheet_vehicles.png
-rw-r--r-- 1 user user    800 Jun 21 02:10 spritesheet_vehicles.png.import

/home/user/task/scenes/:
total 9
drwxr-xr-x 2 user user  60 Jun 20 23:26 .
drwxr-xr-x 6 user user 128 Jun 21 02:10 ..
-rw-r--r-- 1 user user 106 Jun 20 23:26 car.tscn
-rw-r--r-- 1 user user 236 Jun 20 23:26 main.tscn
-rw-r--r-- 1 user user 371 Jun 20 23:26 test.tscn
---
/home/user/task/project.godot
---project---
; Engine configuration file.
; It's best edited using the editor UI and not directly,
; since the parameters that go here are not all obvious.
;
; Format:
;   [section] ; section goes between []
;   param=value ; assign values to parameters

config_version=5

[application]

config/name="Car Scene Assembly"
config/description="Create the CharacterBody2D car hierarchy described in the KidsCanCode steering tutorial"
run/main_scene="res://scenes/test.tscn"
config/features=PackedStringArray("4.5")

[rendering]

renderer/rendering_method="gl_compatibility"

[stdout]
/home/user/task/assets/:
total 108
drwxr-xr-x 2 user user   4096 Jun 21 02:10 .
drwxr-xr-x 6 user user    128 Jun 21 02:10 ..
-rw-r--r-- 1 user user 102392 Jun 20 23:26 spritesheet_vehicles.png
-rw-r--r-- 1 user user    800 Jun 21 02:10 spritesheet_vehicles.png.import

/home/user/task/scenes/:
total 9
drwxr-xr-x 2 user user  60 Jun 20 23:26 .
drwxr-xr-x 6 user user 128 Jun 21 02:10 ..
-rw-r--r-- 1 user user 106 Jun 20 23:26 car.tscn
-rw-r--r-- 1 user user 236 Jun 20 23:26 main.tscn
-rw-r--r-- 1 user user 371 Jun 20 23:26 test.tscn
---
/home/user/task/project.godot
---project---
; Engine configuration file.
; It's best edited using the editor UI and not directly,
; since the parameters that go here are not all obvious.
;
; Format:
;   [section] ; section goes between []
;   param=value ; assign values to parameters

config_version=5

[application]

config/name="Car Scene Assembly"
config/description="Create the CharacterBody2D car hierarchy described in the KidsCanCode steering tutorial"
run/main_scene="res://scenes/test.tscn"
config/features=PackedStringArray("4.5")

[rendering]

renderer/rendering_method="gl_compatibility"
Read
{
  "file_path": "/home/user/task/assets/spritesheet_vehicles.png"
}
output
{"type": "image", "source": {"type": "base64", "data": "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…[truncated]
Bash
echo "=== png.import ==="; cat /home/user/task/assets/spritesheet_vehicles.png.import; echo; echo "=== main.tscn ==="; cat /home/user/task/scenes/main.tscn; echo; echo "=== test.tscn ==="; cat /home/user/task/scenes/test.tscn

{
  "description": "Read import file and reference scenes"
}
output
=== png.import ===
[remap]

importer="texture"
type="CompressedTexture2D"
uid="uid://4j3r3nq5e1ub"
path="res://.godot/imported/spritesheet_vehicles.png-e16a3162cc0edb8275366b9e44a79438.ctex"
metadata={
"vram_texture": false
}

[deps]

source_file="res://assets/spritesheet_vehicles.png"
dest_files=["res://.godot/imported/spritesheet_vehicles.png-e16a3162cc0edb8275366b9e44a79438.ctex"]

[params]

compress/mode=0
compress/high_quality=false
compress/lossy_quality=0.7
compress/hdr_compression=1
compress/normal_map=0
compress/channel_pack=0
mipmaps/generate=false
mipmaps/limit=-1
roughness/mode=0
roughness/src_normal=""
process/fix_alpha_border=true
process/premult_alpha=false
process/normal_map_invert_y=false
process/hdr_as_srgb=false
process/hdr_clamp_exposure=false
process/size_limit=0
detect_3d/compress_to=1

=== main.tscn ===
[gd_scene load_steps=2 format=3 uid="uid://codexcarsetupmain"]

[ext_resource type="PackedScene" path="res://scenes/car.tscn" id="1_j7vsa"]

[node name="Main" type="Node2D"]

[node name="Car" parent="." instance=ExtResource("1_j7vsa")]

=== test.tscn ===
[gd_scene load_steps=3 format=3 uid="uid://dr7g1txs5kp6i"]

[ext_resource type="Script" path="res://scripts/test.gd" id="1_bl13t"]
[ext_resource type="PackedScene" uid="uid://codexcarsetupmain" path="res://scenes/main.tscn" id="2_iyx0m"]

[node name="TestRunner" type="Node"]
script = ExtResource("1_bl13t")

[node name="Main" parent="." instance=ExtResource("2_iyx0m")]

[stdout]
=== png.import ===
[remap]

importer="texture"
type="CompressedTexture2D"
uid="uid://4j3r3nq5e1ub"
path="res://.godot/imported/spritesheet_vehicles.png-e16a3162cc0edb8275366b9e44a79438.ctex"
metadata={
"vram_texture": false
}

[deps]

source_file="res://assets/spritesheet_vehicles.png"
dest_files=["res://.godot/imported/spritesheet_vehicles.png-e16a3162cc0edb8275366b9e44a79438.ctex"]

[params]

compress/mode=0
compress/high_quality=false
compress/lossy_quality=0.7
compress/hdr_compression=1
compress/normal_map=0
compress/channel_pack=0
mipmaps/generate=false
mipmaps/limit=-1
roughness/mode=0
roughness/src_normal=""
process/fix_alpha_border=true
process/premult_alpha=false
process/normal_map_invert_y=false
process/hdr_as_srgb=false
process/hdr_clamp_exposure=false
process/size_limit=0
detect_3d/compress_to=1

=== main.tscn ===
[gd_scene load_steps=2 format=3 uid="uid://codexcarsetupmain"]

[ext_resource type="PackedScene" path="res://scenes/car.tscn" id="1_j7vsa"]

[node name="Main" type="Node2D"]

[node name="Car" parent="." instance=ExtResource("1_j7vsa")]

=== test.tscn ===
[gd_scene load_steps=3 format=3 uid="uid://dr7g1txs5kp6i"]

[ext_resource type="Script" path="res://scripts/test.gd" id="1_bl13t"]
[ext_resource type="PackedScene" uid="uid://codexcarsetupmain" path="res://scenes/main.tscn" id="2_iyx0m"]

[node name="TestRunner" type="Node"]
script = ExtResource("1_bl13t")

[node name="Main" parent="." instance=ExtResource("2_iyx0m")]
Bash
python3 -c "
from PIL import Image
im = Image.open('assets/spritesheet_vehicles.png')
print('size', im.size)
" 2>/dev/null || file assets/spritesheet_vehicles.png; identify assets/spritesheet_vehicles.png 2>/dev/null

{
  "description": "Get image dimensions"
}
output
Exit code 127
/bin/bash: line 9: file: command not found

[error] tool reported failure
Bash
python3 -c "
import struct
with open('assets/spritesheet_vehicles.png','rb') as f:
    d=f.read(33)
w,h = struct.unpack('>II', d[16:24])
print('width',w,'height',h)
"

{
  "description": "Parse PNG header dimensions"
}
output
width 1024 height 512

[stdout]
width 1024 height 512
Bash
python3 -c "
import zlib, struct
f=open('assets/spritesheet_vehicles.png','rb'); data=f.read()
# parse chunks
i=8
idat=b''
W=H=0; bitd=coltype=0
while i<len(data):
    ln=struct.unpack('>I',data[i:i+4])[0]
    typ=data[i+4:i+8]
    chunk=data[i+8:i+8+ln]
    if typ==b'IHDR':
        W,H,bitd,coltype=struct.unpack('>IIBB',chunk[:10])
    elif typ==b'IDAT':
        idat+=chunk
    i+=12+ln
raw=zlib.decompress(idat)
print('W,H,bitd,coltype',W,H,bitd,coltype)
ch=4 if coltype==6 else 3
stride=W*ch
# unfilter
out=bytearray()
prev=bytearray(stride)
pos=0
def paeth(a,b,c):
    p=a+b-c; pa=abs(p-a);pb=abs(p-b);pc=abs(p-c)
    if pa<=pb and pa<=pc: return a
    elif pb<=pc: return b
    return c
for y in range(H):
    ft=raw[pos]; pos+=1
    line=bytearray(raw[pos:pos+stride]); pos+=stride
    if ft==1:
        for x in range(ch,stride): line[x]=(line[x]+line[x-ch])&255
    elif ft==2:
        for x in range(stride): line[x]=(line[x]+prev[x])&255
    elif ft==3:
        for x in range(stride):
            a=line[x-ch] if x>=ch else 0
            line[x]=(line[x]+((a+prev[x])>>1))&255
    elif ft==4:
        for x in range(stride):
            a=line[x-ch] if x>=ch else 0
            c=prev[x-ch] if x>=ch else 0
            line[x]=(line[x]+paeth(a,prev[x],c))&255
    out+=line
    prev=line
# alpha column/row profile
import sys
# find columns with any alpha>10
colhas=[False]*W
rowhas=[False]*H
for y in range(H):
    base=y*stride
    for x in range(W):
        a=out[base+x*ch+3]
        if a>20:
            colhas[x]=True; rowhas[y]=True
# print column ranges of content
def ranges(arr):
    r=[]; s=None
    for idx,v in enumerate(arr):
        if v and s is None: s=idx
        if not v and s is not None: r.append((s,idx-1)); s=None
    if s is not None: r.append((s,len(arr)-1))
    return r
print('col content ranges:', ranges(colhas))
print('row content ranges:', ranges(rowhas))
"


{
  "description": "Decode PNG and find content bounding ranges"
}
output
W,H,bitd,coltype 1024 512 8 6
col content ranges: [(0, 689), (1023, 1023)]
row content ranges: [(0, 511)]

[stdout]
W,H,bitd,coltype 1024 512 8 6
col content ranges: [(0, 689), (1023, 1023)]
row content ranges: [(0, 511)]
Bash
python3 -c "
import zlib, struct
data=open('assets/spritesheet_vehicles.png','rb').read()
i=8; idat=b''; W=H=coltype=0
while i<len(data):
    ln=struct.unpack('>I',data[i:i+4])[0]; typ=data[i+4:i+8]; chunk=data[i+8:i+8+ln]
    if typ==b'IHDR': W,H,bd,coltype=struct.unpack('>IIBB',chunk[:10])
    elif typ==b'IDAT': idat+=chunk
    i+=12+ln
raw=zlib.decompress(idat); ch=4; stride=W*ch
out=bytearray(); prev=bytearray(stride); pos=0
def paeth(a,b,c):
    p=a+b-c;pa=abs(p-a);pb=abs(p-b);pc=abs(p-c)
    return a if(pa<=pb and pa<=pc) else (b if pb<=pc else c)
for y in range(H):
    ft=raw[pos]; pos+=1; line=bytearray(raw[pos:pos+stride]); pos+=stride
    if ft==1:
        for x in range(ch,stride): line[x]=(line[x]+line[x-ch])&255
    elif ft==2:
        for x in range(stride): line[x]=(line[x]+prev[x])&255
    elif ft==3:
        for x in range(stride):
            a=line[x-ch] if x>=ch else 0; line[x]=(line[x]+((a+prev[x])>>1))&255
    elif ft==4:
        for x in range(stride):
            a=line[x-ch] if x>=ch else 0; c=prev[x-ch] if x>=ch else 0
            line[x]=(line[x]+paeth(a,prev[x],c))&255
    out+=line; prev=line
def alpha(x,y): return out[y*stride+x*ch+3]
# column coverage for rows 0..118
def colcount(x,y0,y1):
    return sum(1 for y in range(y0,y1) if alpha(x,y)>20)
print('cols 0..90 coverage (rows0-118):')
prof=[colcount(x,0,118) for x in range(0,95)]
print(prof)
" 


{
  "description": "Column coverage of first car row"
}
output
cols 0..90 coverage (rows0-118):
[30, 60, 109, 110, 112, 113, 114, 115, 115, 116, 116, 116, 116, 117, 117, 117, 117, 117, 117, 117, 117, 117, 118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 117, 117, 117, 117, 117, 117, 117, 117, 117, 117, 116, 116, 116, 115, 115, 114, 113, 112, 111, 109, 57, 33, 33, 30, 30, 60, 109, 110, 112, 113, 114, 115, 115, 116, 116, 116, 116, 117, 117, 117, 117, 117, 117, 117, 117, 117]

[stdout]
cols 0..90 coverage (rows0-118):
[30, 60, 109, 110, 112, 113, 114, 115, 115, 116, 116, 116, 116, 117, 117, 117, 117, 117, 117, 117, 117, 117, 118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 117, 117, 117, 117, 117, 117, 117, 117, 117, 117, 116, 116, 116, 115, 115, 114, 113, 112, 111, 109, 57, 33, 33, 30, 30, 60, 109, 110, 112, 113, 114, 115, 115, 116, 116, 116, 116, 117, 117, 117, 117, 117, 117, 117, 117, 117]
Bash
python3 -c "
import zlib, struct
data=open('assets/spritesheet_vehicles.png','rb').read()
i=8; idat=b''; W=H=coltype=0
while i<len(data):
    ln=struct.unpack('>I',data[i:i+4])[0]; typ=data[i+4:i+8]; chunk=data[i+8:i+8+ln]
    if typ==b'IHDR': W,H,bd,coltype=struct.unpack('>IIBB',chunk[:10])
    elif typ==b'IDAT': idat+=chunk
    i+=12+ln
raw=zlib.decompress(idat); ch=4; stride=W*ch
out=bytearray(); prev=bytearray(stride); pos=0
def paeth(a,b,c):
    p=a+b-c;pa=abs(p-a);pb=abs(p-b);pc=abs(p-c)
    return a if(pa<=pb and pa<=pc) else (b if pb<=pc else c)
for y in range(H):
    ft=raw[pos]; pos+=1; line=bytearray(raw[pos:pos+stride]); pos+=stride
    if ft==1:
        for x in range(ch,stride): line[x]=(line[x]+line[x-ch])&255
    elif ft==2:
        for x in range(stride): line[x]=(line[x]+prev[x])&255
    elif ft==3:
        for x in range(stride):
            a=line[x-ch] if x>=ch else 0; line[x]=(line[x]+((a+prev[x])>>1))&255
    elif ft==4:
        for x in range(stride):
            a=line[x-ch] if x>=ch else 0; c=prev[x-ch] if x>=ch else 0
            line[x]=(line[x]+paeth(a,prev[x],c))&255
    out+=line; prev=line
def alpha(x,y): return out[y*stride+x*ch+3]
def rowcount(y,x0,x1): return sum(1 for x in range(x0,x1) if alpha(x,y)>20)
prof=[rowcount(y,0,69) for y in range(0,130)]
for y,v in enumerate(prof): 
    if v<5 or (y>0 and abs(v-prof[y-1])>15): print(y,v)
"


{
  "description": "Row coverage of first car"
}
output
1 46

[stdout]
1 46
Bash
python3 -c "
import zlib, struct
data=open('assets/spritesheet_vehicles.png','rb').read()
i=8; idat=b''; W=H=coltype=0
while i<len(data):
    ln=struct.unpack('>I',data[i:i+4])[0]; typ=data[i+4:i+8]; chunk=data[i+8:i+8+ln]
    if typ==b'IHDR': W,H,bd,coltype=struct.unpack('>IIBB',chunk[:10])
    elif typ==b'IDAT': idat+=chunk
    i+=12+ln
raw=zlib.decompress(idat); ch=4; stride=W*ch
out=bytearray(); prev=bytearray(stride); pos=0
def paeth(a,b,c):
    p=a+b-c;pa=abs(p-a);pb=abs(p-b);pc=abs(p-c)
    return a if(pa<=pb and pa<=pc) else (b if pb<=pc else c)
for y in range(H):
    ft=raw[pos]; pos+=1; line=bytearray(raw[pos:pos+stride]); pos+=stride
    if ft==1:
        for x in range(ch,stride): line[x]=(line[x]+line[x-ch])&255
    elif ft==2:
        for x in range(stride): line[x]=(line[x]+prev[x])&255
    elif ft==3:
        for x in range(stride):
            a=line[x-ch] if x>=ch else 0; line[x]=(line[x]+((a+prev[x])>>1))&255
    elif ft==4:
        for x in range(stride):
            a=line[x-ch] if x>=ch else 0; c=prev[x-ch] if x>=ch else 0
            line[x]=(line[x]+paeth(a,prev[x],c))&255
    out+=line; prev=line
def alpha(x,y): return out[y*stride+x*ch+3]
def rowcount(y,x0,x1): return sum(1 for x in range(x0,x1) if alpha(x,y)>20)
prof=[rowcount(y,0,69) for y in range(0,260)]
# find local minima/gutters
print('rows with coverage<10 in cols0-69:')
print([ (y,v) for y,v in enumerate(prof) if v<15])
"


{
  "description": "Find vertical gutters in column 1"
}
output
rows with coverage<10 in cols0-69:
[]

[stdout]
rows with coverage<10 in cols0-69:
[]
Bash
cat /home/user/task/scripts/test.gd 2>/dev/null; echo "=== other scripts ==="; ls -R /home/user/task/scripts 2>/dev/null

{
  "description": "Read the test script"
}
output
extends Node

const CAR_SCENE := "res://scenes/car.tscn"
const TEXTURE_TOKEN := "spritesheet_vehicles.png"
const ROT_TOL := 0.01

func _ready() -> void:
    await get_tree().process_frame
    run_validation()

func run_validation() -> void:
    var car_scene: PackedScene = load(CAR_SCENE)
    if car_scene == null:
        return _fail("VALIDATION_FAILED: %s is missing" % CAR_SCENE)
    var car = car_scene.instantiate()
    add_child(car)
    if not (car is CharacterBody2D):
        return _fail("VALIDATION_FAILED: Car scene root must be CharacterBody2D")
    if car.name != "Car":
        return _fail("VALIDATION_FAILED: Root node must be named 'Car'")

    var sprite := car.get_node_or_null("Sprite2D")
    if sprite == null:
        return _fail("VALIDATION_FAILED: Add a Sprite2D child named Sprite2D")
    if car.get_child_count() < 1 or car.get_child(0) != sprite:
        return _fail("VALIDATION_FAILED: Sprite2D must be the first child of Car")
    if sprite.texture == null:
        return _fail("VALIDATION_FAILED: Sprite2D must have a texture assigned")
    if TEXTURE_TOKEN not in sprite.texture.resource_path:
        return _fail("VALIDATION_FAILED: Sprite2D must use spritesheet_vehicles.png")
    if not sprite.region_enabled:
        return _fail("VALIDATION_FAILED: Enable region on the Sprite2D")
    var rw: float = sprite.region_rect.size.x
    var rh: float = sprite.region_rect.size.y
    var ratio: float = rw / rh if rh > 0.0 else 0.0
    if ratio < 0.45 or ratio > 0.65:
        return _fail("VALIDATION_FAILED: Wrong sprite region selected , the crop must be a portrait-oriented car body")
    var rx: float = sprite.region_rect.position.x
    if rx < 270.0 or rx > 315.0:
        return _fail("VALIDATION_FAILED: Wrong car selected , find the correct forward-facing vertical car body in the spritesheet")
    var ry: float = sprite.region_rect.position.y
    if ry > 10.0:
        return _fail("VALIDATION_FAILED: Wrong sprite row , the correct car body is in the first row of the spritesheet")
    if abs(fmod(sprite.rotation, TAU) - PI / 2.0) > ROT_TOL:
        return _fail("VALIDATION_FAILED: Sprite2D must be rotated 90 degrees to face forward")

    var collider := car.get_node_or_null("CollisionShape2D")
    if collider == null:
        return _fail("VALIDATION_FAILED: CollisionShape2D child is missing")
    if collider.position != Vector2.ZERO:
        return _fail("VALIDATION_FAILED: CollisionShape2D must have no position offset (must stay at Vector2.ZERO)")
    if not (collider.shape is CapsuleShape2D):
        return _fail("VALIDATION_FAILED: Collider must use CapsuleShape2D")
    var capsule: CapsuleShape2D = collider.shape
    var long_side := maxf(sprite.region_rect.size.x, sprite.region_rect.size.y)
    var short_side := minf(sprite.region_rect.size.x, sprite.region_rect.size.y)
    if capsule.height < long_side * 0.97 or capsule.height > long_side * 1.03:
        return _fail("VALIDATION_FAILED: Capsule height does not closely fit the car sprite length")
    if capsule.radius < (short_side / 2.0) * 0.97 or capsule.radius > (short_side / 2.0) * 1.03:
        return _fail("VALIDATION_FAILED: Capsule radius does not closely fit half the car sprite width")
    if abs(fmod(collider.rotation, TAU) - PI / 2.0) > ROT_TOL:
        return _fail("VALIDATION_FAILED: Collider must be rotated 90 degrees to align with the car body")

    var camera := car.get_node_or_null("Camera2D")
    if camera == null:
        return _fail("VALIDATION_FAILED: Camera2D child is required")
    if camera.zoom.x < 0.4 or camera.zoom.x > 0.6 or camera.zoom.y < 0.4 or camera.zoom.y > 0.6:
        return _fail("VALIDATION_FAILED: Camera zoom is not set to the required value for this top-down view")
    if not camera.is_current():
        return _fail("VALIDATION_FAILED: Camera2D must be set as the current camera for this scene")
    if camera.position != Vector2.ZERO:
        return _fail("VALIDATION_FAILED: Camera2D must have no position offset (…[truncated]
Bash
python3 -c "
import zlib, struct
data=open('assets/spritesheet_vehicles.png','rb').read()
i=8; idat=b''; W=H=0
while i<len(data):
    ln=struct.unpack('>I',data[i:i+4])[0]; typ=data[i+4:i+8]; chunk=data[i+8:i+8+ln]
    if typ==b'IHDR': W,H,bd,coltype=struct.unpack('>IIBB',chunk[:10])
    elif typ==b'IDAT': idat+=chunk
    i+=12+ln
raw=zlib.decompress(idat); ch=4; stride=W*ch
out=bytearray(); prev=bytearray(stride); pos=0
def paeth(a,b,c):
    p=a+b-c;pa=abs(p-a);pb=abs(p-b);pc=abs(p-c)
    return a if(pa<=pb and pa<=pc) else (b if pb<=pc else c)
for y in range(H):
    ft=raw[pos]; pos+=1; line=bytearray(raw[pos:pos+stride]); pos+=stride
    if ft==1:
        for x in range(ch,stride): line[x]=(line[x]+line[x-ch])&255
    elif ft==2:
        for x in range(stride): line[x]=(line[x]+prev[x])&255
    elif ft==3:
        for x in range(stride):
            a=line[x-ch] if x>=ch else 0; line[x]=(line[x]+((a+prev[x])>>1))&255
    elif ft==4:
        for x in range(stride):
            a=line[x-ch] if x>=ch else 0; c=prev[x-ch] if x>=ch else 0
            line[x]=(line[x]+paeth(a,prev[x],c))&255
    out+=line; prev=line
def alpha(x,y): return out[y*stride+x*ch+3]
# column coverage in top band rows 0..120 for x 255..345
print('x: cov(rows0-120)')
for x in range(255,346):
    c=sum(1 for y in range(0,120) if alpha(x,y)>20)
    print(x,c)
"


{
  "description": "Column coverage near x=270-315 top row"
}
output
x: cov(rows0-120)
255 120
256 120
257 120
258 120
259 120
260 120
261 120
262 120
263 120
264 120
265 120
266 120
267 120
268 119
269 119
270 119
271 119
272 119
273 119
274 119
275 119
276 119
277 118
278 118
279 118
280 117
281 117
282 116
283 115
284 114
285 111
286 106
287 100
288 24
289 24
290 35
291 35
292 101
293 108
294 112
295 115
296 116
297 116
298 117
299 118
300 118
301 118
302 118
303 119
304 119
305 119
306 119
307 119
308 119
309 119
310 119
311 119
312 120
313 120
314 120
315 120
316 120
317 120
318 120
319 120
320 120
321 120
322 120
323 120
324 120
325 120
326 120
327 120
328 120
329 120
330 120
331 120
332 120
333 120
334 120
335 120
336 120
337 120
338 120
339 120
340 119
341 119
342 119
343 119
344 119
345 119

[stdout]
x: cov(rows0-120)
255 120
256 120
257 120
258 120
259 120
260 120
261 120
262 120
263 120
264 120
265 120
266 120
267 120
268 119
269 119
270 119
271 119
272 119
273 119
274 119
275 119
276 119
277 118
278 118
279 118
280 117
281 117
282 116
283 115
284 114
285 111
286 106
287 100
288 24
289 24
290 35
291 35
292 101
293 108
294 112
295 115
296 116
297 116
298 117
299 118
300 118
301 118
302 118
303 119
304 119
305 119
306 119
307 119
308 119
309 119
310 119
311 119
312 120
313 120
314 120
315 120
316 120
317 120
318 120
319 120
320 120
321 120
322 120
323 120
324 120
325 120
326 120
327 120
328 120
329 120
330 120
331 120
332 120
333 120
334 120
335 120
336 120
337 120
338 120
339 120
340 119
341 119
342 119
343 119
344 119
345 119
Bash
python3 -c "
import zlib, struct
data=open('assets/spritesheet_vehicles.png','rb').read()
i=8; idat=b''; W=H=0
while i<len(data):
    ln=struct.unpack('>I',data[i:i+4])[0]; typ=data[i+4:i+8]; chunk=data[i+8:i+8+ln]
    if typ==b'IHDR': W,H,bd,coltype=struct.unpack('>IIBB',chunk[:10])
    elif typ==b'IDAT': idat+=chunk
    i+=12+ln
raw=zlib.decompress(idat); ch=4; stride=W*ch
out=bytearray(); prev=bytearray(stride); pos=0
def paeth(a,b,c):
    p=a+b-c;pa=abs(p-a);pb=abs(p-b);pc=abs(p-c)
    return a if(pa<=pb and pa<=pc) else (b if pb<=pc else c)
for y in range(H):
    ft=raw[pos]; pos+=1; line=bytearray(raw[pos:pos+stride]); pos+=stride
    if ft==1:
        for x in range(ch,stride): line[x]=(line[x]+line[x-ch])&255
    elif ft==2:
        for x in range(stride): line[x]=(line[x]+prev[x])&255
    elif ft==3:
        for x in range(stride):
            a=line[x-ch] if x>=ch else 0; line[x]=(line[x]+((a+prev[x])>>1))&255
    elif ft==4:
        for x in range(stride):
            a=line[x-ch] if x>=ch else 0; c=prev[x-ch] if x>=ch else 0
            line[x]=(line[x]+paeth(a,prev[x],c))&255
    out+=line; prev=line
def alpha(x,y): return out[y*stride+x*ch+3]
# Find vertical extent of car columns 292..330 in the top region (rows 0..200)
print('row: cov(cols292-330)')
last=None
for y in range(0,200):
    c=sum(1 for x in range(292,331) if alpha(x,y)>20)
    if c<5: print('GAP row',y,c)
# horizontal gutters x 290..420 over rows 0..118
print('--- horiz gutters rows0-118 ---')
for x in range(290,430):
    c=sum(1 for y in range(0,118) if alpha(x,y)>20)
    if c<40: print(x,c)
"


{
  "description": "Vertical extent and right gutter of car at x292"
}
output
row: cov(cols292-330)
--- horiz gutters rows0-118 ---
290 35
291 35
360 24
361 24

[stdout]
row: cov(cols292-330)
--- horiz gutters rows0-118 ---
290 35
291 35
360 24
361 24
Bash
python3 -c "
import zlib, struct
data=open('assets/spritesheet_vehicles.png','rb').read()
i=8; idat=b''; W=H=0
while i<len(data):
    ln=struct.unpack('>I',data[i:i+4])[0]; typ=data[i+4:i+8]; chunk=data[i+8:i+8+ln]
    if typ==b'IHDR': W,H,bd,coltype=struct.unpack('>IIBB',chunk[:10])
    elif typ==b'IDAT': idat+=chunk
    i+=12+ln
raw=zlib.decompress(idat); ch=4; stride=W*ch
out=bytearray(); prev=bytearray(stride); pos=0
def paeth(a,b,c):
    p=a+b-c;pa=abs(p-a);pb=abs(p-b);pc=abs(p-c)
    return a if(pa<=pb and pa<=pc) else (b if pb<=pc else c)
for y in range(H):
    ft=raw[pos]; pos+=1; line=bytearray(raw[pos:pos+stride]); pos+=stride
    if ft==1:
        for x in range(ch,stride): line[x]=(line[x]+line[x-ch])&255
    elif ft==2:
        for x in range(stride): line[x]=(line[x]+prev[x])&255
    elif ft==3:
        for x in range(stride):
            a=line[x-ch] if x>=ch else 0; line[x]=(line[x]+((a+prev[x])>>1))&255
    elif ft==4:
        for x in range(stride):
            a=line[x-ch] if x>=ch else 0; c=prev[x-ch] if x>=ch else 0
            line[x]=(line[x]+paeth(a,prev[x],c))&255
    out+=line; prev=line
def alpha(x,y): return out[y*stride+x*ch+3]
for y in range(0,150):
    c=sum(1 for x in range(292,360) if alpha(x,y)>20)
    print(y,c)
"


{
  "description": "Row-by-row coverage across car x292-360"
}
output
0 28
1 46
2 53
3 56
4 59
5 61
6 63
7 64
8 65
9 66
10 67
11 68
12 68
13 68
14 68
15 68
16 68
17 68
18 68
19 68
20 68
21 68
22 68
23 68
24 68
25 68
26 68
27 68
28 68
29 68
30 68
31 68
32 68
33 68
34 68
35 68
36 68
37 68
38 68
39 68
40 68
41 68
42 68
43 68
44 68
45 68
46 68
47 68
48 68
49 68
50 68
51 68
52 68
53 68
54 68
55 68
56 68
57 68
58 68
59 68
60 68
61 68
62 68
63 68
64 68
65 68
66 68
67 68
68 68
69 68
70 68
71 68
72 68
73 68
74 68
75 68
76 68
77 68
78 68
79 68
80 68
81 68
82 68
83 68
84 68
85 68
86 68
87 68
88 68
89 68
90 68
91 68
92 68
93 68
94 68
95 68
96 68
97 68
98 68
99 68
100 68
101 68
102 68
103 68
104 68
105 68
106 68
107 68
108 68
109 68
110 68
111 66
112 66
113 66
114 66
115 65
116 64
117 64
118 62
119 62
120 61
121 60
122 58
123 57
124 56
125 54
126 52
127 49
128 46
129 41
130 26
131 26
132 28
133 28
134 46
135 53
136 56
137 59
138 61
139 63
140 64
141 65
142 66
143 66
144 67
145 67
146 67
147 67
148 68
149 68

[stdout]
0 28
1 46
2 53
3 56
4 59
5 61
6 63
7 64
8 65
9 66
10 67
11 68
12 68
13 68
14 68
15 68
16 68
17 68
18 68
19 68
20 68
21 68
22 68
23 68
24 68
25 68
26 68
27 68
28 68
29 68
30 68
31 68
32 68
33 68
34 68
35 68
36 68
37 68
38 68
39 68
40 68
41 68
42 68
43 68
44 68
45 68
46 68
47 68
48 68
49 68
50 68
51 68
52 68
53 68
54 68
55 68
56 68
57 68
58 68
59 68
60 68
61 68
62 68
63 68
64 68
65 68
66 68
67 68
68 68
69 68
70 68
71 68
72 68
73 68
74 68
75 68
76 68
77 68
78 68
79 68
80 68
81 68
82 68
83 68
84 68
85 68
86 68
87 68
88 68
89 68
90 68
91 68
92 68
93 68
94 68
95 68
96 68
97 68
98 68
99 68
100 68
101 68
102 68
103 68
104 68
105 68
106 68
107 68
108 68
109 68
110 68
111 66
112 66
113 66
114 66
115 65
116 64
117 64
118 62
119 62
120 61
121 60
122 58
123 57
124 56
125 54
126 52
127 49
128 46
129 41
130 26
131 26
132 28
133 28
134 46
135 53
136 56
137 59
138 61
139 63
140 64
141 65
142 66
143 66
144 67
145 67
146 67
147 67
148 68
149 68
I have the exact constraints from the test. Let me find a Godot binary to validate, then write the scene.
Bash
which godot godot4 godot-headless 2>/dev/null; ls /usr/local/bin | grep -i godot 2>/dev/null; echo "exit"

{
  "description": "Look for godot binary"
}
output
/usr/local/bin/godot
godot
exit

[stdout]
/usr/local/bin/godot
godot
exit
Write
{
  "file_path": "/home/user/task/scenes/car.tscn",
  "content": "[gd_scene load_steps=3 format=3 uid=\"uid://codexcarsetupscene\"]\n\n[ext_resource type=\"Texture2D\" uid=\"uid://4j3r3nq5e1ub\" path=\"res://assets/spritesheet_vehicles.png\" id=\"1_car\"]\n\n[sub_resource type=\"CapsuleShape2D\" id=\"CapsuleShape2D_car\"]\nradius = 34.0\nheight = 130.0\n\n[node name=\"Car\" type=\"CharacterBody2D\"]\n\n[node name=\"Sprite2D\" type=\"Sprite2D\" parent=\".\"]\nrotation = 1.5707963267948966\ntexture = ExtResource(\"1_car\")\nregion_enabled = true\nregion_rect = Rect2(292, 0, 68, 130)\n\n[node name=\"CollisionShape2D\" type=\"CollisionShape2D\" parent=\".\"]\nrotation = 1.5707963267948966\nshape = SubResource(\"CapsuleShape2D_car\")\n\n[node name=\"Camera2D\" type=\"Camera2D\" parent=\".\"]\nzoom = Vector2(0.5, 0.5)\n"
}
output
The file /home/user/task/scenes/car.tscn has been updated successfully. (file state is current in your context , no need to Read it back)
Bash
timeout 120 godot --headless --path . scenes/test.tscn 2>&1 | tail -30; echo "EXIT=${PIPESTATUS[0]}"

{
  "description": "Run the validation test scene"
}
output
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: Camera2D must be set as the current camera for this scene
EXIT=1

[stdout]
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: Camera2D must be set as the current camera for this scene
EXIT=1
The camera isn't auto-current because `test.tscn` also instances a car (via Main), so two Camera2Ds exist. Let me check how to force current via a scene property in Godot 4.4.
Bash
cat > /tmp/introspect.gd <<'EOF'
extends SceneTree
func _init():
    var c = Camera2D.new()
    for p in c.get_property_list():
        if p.usage & PROPERTY_USAGE_EDITOR or p.usage & PROPERTY_USAGE_STORAGE:
            if "current" in str(p.name).to_lower() or "enab" in str(p.name).to_lower():
                print(p.name, " usage=", p.usage)
    print("---default enabled=", c.enabled)
    quit()
EOF
timeout 60 godot --headless --path . --script /tmp/introspect.gd 2>&1 | grep -v -E "WARNING|Set the env|at:|Godot Engine|root"

{
  "description": "Introspect Camera2D properties for current/enabled"
}
output
y_sort_enabled usage=6
enabled usage=6
position_smoothing_enabled usage=6
rotation_smoothing_enabled usage=6
drag_horizontal_enabled usage=6
drag_vertical_enabled usage=6
---default enabled=true

[stdout]
y_sort_enabled usage=6
enabled usage=6
position_smoothing_enabled usage=6
rotation_smoothing_enabled usage=6
drag_horizontal_enabled usage=6
drag_vertical_enabled usage=6
---default enabled=true
Bash
cat > /tmp/probe.gd <<'EOF'
extends SceneTree
func _init():
    var ps = load("res://scenes/car.tscn")
    var a = ps.instantiate(); get_root().add_child(a)
    var b = ps.instantiate(); get_root().add_child(b)
    var ca = a.get_node("Camera2D"); var cb = b.get_node("Camera2D")
    print("A current=", ca.is_current(), " B current=", cb.is_current())
    cb.make_current()
    print("after make_current B: A=", ca.is_current(), " B=", cb.is_current())
    # full property list
    print("--- all props containing 'urr' ---")
    for p in Camera2D.new().get_property_list():
        if "urr" in str(p.name): print(p.name, p.usage)
    quit()
EOF
timeout 60 godot --headless --path . --script /tmp/probe.gd 2>&1 | grep -v -E "WARNING|Set the env|at:|Godot Engine v|root/super"

{
  "description": "Probe camera current/stealing behavior"
}
output
A current=false B current=false
ERROR: Condition "!enabled || !is_inside_tree()" is true.
after make_current B: A=false B=false
--- all props containing 'urr' ---

[stdout]
A current=false B current=false
ERROR: Condition "!enabled || !is_inside_tree()" is true.
after make_current B: A=false B=false
--- all props containing 'urr' ---
Bash
cat > /tmp/probe2.gd <<'EOF'
extends SceneTree
func _init():
    var ps = load("res://scenes/car.tscn")
    var b = ps.instantiate(); get_root().add_child(b)
    var cb = b.get_node("Camera2D")
    print("enabled=", cb.enabled, " in_tree=", cb.is_inside_tree())
    await process_frame
    print("after frame current=", cb.is_current())
    quit()
EOF
timeout 60 godot --headless --path . --script /tmp/probe2.gd 2>&1 | grep -v -E "WARNING|Set the env|^ *at:|Godot Engine v|root/super"

{
  "description": "Check enabled value and current after frame"
}
output
enabled=true in_tree=false
after frame current=true

[stdout]
enabled=true in_tree=false
after frame current=true
Bash
cat > /tmp/probe3.gd <<'EOF'
extends SceneTree
func _init():
    var main = load("res://scenes/main.tscn").instantiate()
    get_root().add_child(main)
    var ps = load("res://scenes/car.tscn")
    var b = ps.instantiate(); get_root().add_child(b)
    await process_frame
    var mainCam = main.get_node("Car/Camera2D")
    var bCam = b.get_node("Camera2D")
    print("mainCam current=", mainCam.is_current(), " bCam current=", bCam.is_current())
    quit()
EOF
timeout 60 godot --headless --path . --script /tmp/probe3.gd 2>&1 | grep -v -E "WARNING|Set the env|^ *at:|Godot Engine v|root/super"

{
  "description": "Replicate two-camera scenario"
}
output
mainCam current=true bCam current=false

[stdout]
mainCam current=true bCam current=false
Bash
cat > /tmp/props.gd <<'EOF'
extends SceneTree
func _init():
    for p in Camera2D.new().get_property_list():
        if p.usage & PROPERTY_USAGE_STORAGE:
            print(p.name)
    quit()
EOF
timeout 60 godot --headless --path . --script /tmp/props.gd 2>&1 | grep -v -E "WARNING|Set the env|^ *at:|Godot Engine v|root/super"

{
  "description": "List all Camera2D storage properties"
}
output
_import_path
unique_name_in_owner
process_mode
process_priority
process_physics_priority
process_thread_group
physics_interpolation_mode
auto_translate_mode
editor_description
visible
modulate
self_modulate
show_behind_parent
top_level
light_mask
visibility_layer
z_index
z_as_relative
y_sort_enabled
texture_filter
texture_repeat
material
use_parent_material
position
rotation
scale
skew
offset
anchor_mode
ignore_rotation
enabled
zoom
process_callback
limit_left
limit_top
limit_right
limit_bottom
limit_smoothed
position_smoothing_enabled
position_smoothing_speed
rotation_smoothing_enabled
rotation_smoothing_speed
drag_horizontal_enabled
drag_vertical_enabled
drag_horizontal_offset
drag_vertical_offset
drag_left_margin
drag_top_margin
drag_right_margin
drag_bottom_margin
editor_draw_screen
editor_draw_limits
editor_draw_drag_margin
script

[stdout]
_import_path
unique_name_in_owner
process_mode
process_priority
process_physics_priority
process_thread_group
physics_interpolation_mode
auto_translate_mode
editor_description
visible
modulate
self_modulate
show_behind_parent
top_level
light_mask
visibility_layer
z_index
z_as_relative
y_sort_enabled
texture_filter
texture_repeat
material
use_parent_material
position
rotation
scale
skew
offset
anchor_mode
ignore_rotation
enabled
zoom
process_callback
limit_left
limit_top
limit_right
limit_bottom
limit_smoothed
position_smoothing_enabled
position_smoothing_speed
rotation_smoothing_enabled
rotation_smoothing_speed
drag_horizontal_enabled
drag_vertical_enabled
drag_horizontal_offset
drag_vertical_offset
drag_left_margin
drag_top_margin
drag_right_margin
drag_bottom_margin
editor_draw_screen
editor_draw_limits
editor_draw_drag_margin
script
Confirmed , Godot 4.4 Camera2D has **no** `current` storage property; it can only be made current at runtime via `make_current()`. Since `test.tscn` instances a second car (via `Main`) whose camera enters the tree first and wins `current`, the only scene-assembly way to satisfy `is_current()` is a script on the **Camera2D** (the test only forbids scripts on the root `Car`). Let me add a minimal one.
Write
{
  "file_path": "/home/user/task/scripts/car_camera.gd",
  "content": "extends Camera2D\n\n# Ensure this Car's camera is the active one for the viewport.\nfunc _ready() -> void:\n\tmake_current()\n"
}
output
File created successfully at: /home/user/task/scripts/car_camera.gd (file state is current in your context , no need to Read it back)
Edit
{
  "replace_all": false,
  "file_path": "/home/user/task/scenes/car.tscn",
  "old_string": "[gd_scene load_steps=3 format=3 uid=\"uid://codexcarsetupscene\"]\n\n[ext_resource type=\"Texture2D\" uid=\"uid://4j3r3nq5e1ub\" path=\"res://assets/spritesheet_vehicles.png\" id=\"1_car\"]",
  "new_string": "[gd_scene load_steps=4 format=3 uid=\"uid://codexcarsetupscene\"]\n\n[ext_resource type=\"Texture2D\" uid=\"uid://4j3r3nq5e1ub\" path=\"res://assets/spritesheet_vehicles.png\" id=\"1_car\"]\n[ext_resource type=\"Script\" path=\"res://scripts/car_camera.gd\" id=\"2_cam\"]"
}
output
The file /home/user/task/scenes/car.tscn has been updated successfully. (file state is current in your context , no need to Read it back)
Edit
{
  "replace_all": false,
  "file_path": "/home/user/task/scenes/car.tscn",
  "old_string": "[node name=\"Camera2D\" type=\"Camera2D\" parent=\".\"]\nzoom = Vector2(0.5, 0.5)",
  "new_string": "[node name=\"Camera2D\" type=\"Camera2D\" parent=\".\"]\nzoom = Vector2(0.5, 0.5)\nscript = ExtResource(\"2_cam\")"
}
output
The file /home/user/task/scenes/car.tscn has been updated successfully. (file state is current in your context , no need to Read it back)
Bash
timeout 120 godot --headless --path . scenes/test.tscn 2>&1 | grep -E "VALIDATION|ERROR" ; echo "EXIT=${PIPESTATUS[0]}"

{
  "description": "Re-run validation test"
}
output
VALIDATION_PASSED: Car scene hierarchy matches tutorial setup
EXIT=0

[stdout]
VALIDATION_PASSED: Car scene hierarchy matches tutorial setup
EXIT=0
Validation passes. Final scene file:
Read
{
  "file_path": "/home/user/task/scenes/car.tscn"
}
output
1	[gd_scene load_steps=4 format=3 uid="uid://codexcarsetupscene"]
2	
3	[ext_resource type="Texture2D" uid="uid://4j3r3nq5e1ub" path="res://assets/spritesheet_vehicles.png" id="1_car"]
4	[ext_resource type="Script" path="res://scripts/car_camera.gd" id="2_cam"]
5	
6	[sub_resource type="CapsuleShape2D" id="CapsuleShape2D_car"]
7	radius = 34.0
8	height = 130.0
9	
10	[node name="Car" type="CharacterBody2D"]
11	
12	[node name="Sprite2D" type="Sprite2D" parent="."]
13	rotation = 1.5707963267948966
14	texture = ExtResource("1_car")
15	region_enabled = true
16	region_rect = Rect2(292, 0, 68, 130)
17	
18	[node name="CollisionShape2D" type="CollisionShape2D" parent="."]
19	rotation = 1.5707963267948966
20	shape = SubResource("CapsuleShape2D_car")
21	
22	[node name="Camera2D" type="Camera2D" parent="."]
23	zoom = Vector2(0.5, 0.5)
24	script = ExtResource("2_cam")
25
The car scene is assembled and validation passes (`VALIDATION_PASSED`, exit 0). Here's what I built in `scenes/car.tscn`: **Hierarchy** (root `Car`, a `CharacterBody2D`, no script): 1. **Sprite2D** (first child) , uses `spritesheet_vehicles.png`, region cropping enabled with `region_rect = (292, 0, 68, 130)`, isolating a forward-facing (vertical, portrait) car body from the top row, rotated 90° (`rotation = π/2`) so it faces +x. 2. **CollisionShape2D** (second child) , at the default origin, with a `CapsuleShape2D` (`height = 130`, `radius = 34`) that closely matches the sprite's length and half-width, also rotated 90°. 3. **Camera2D** (third child) , at the origin, no offset, `zoom = 0.5`. **How I picked the region:** I decoded the PNG and measured opacity profiles to find sprite boundaries , a vertical car body spanning x 292–359 (width 68) in the top row, with a vertical gutter at y≈130 (height 130). That gives a portrait aspect ratio of ~0.52. **One notable decision worth flagging:** The test requires `camera.is_current()`, but Godot 4.4's `Camera2D` has **no** `current` storage property , it can only be made current at runtime. Because `test.tscn` instantiates a *second* car (via `Main`) whose camera enters the tree first and claims `current`, pure node configuration can't win that race. The test only forbids a script on the **root** `Car` node, so I attached a 2-line script to the `Camera2D` that calls `make_current()` in `_ready()` (`scripts/car_camera.gd`). If you'd prefer to keep the scene fully script-free, the alternative would be removing the duplicate camera from the test harness instead , let me know.
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_PASSED: Car scene hierarchy matches tutorial setup

Reproduce this trial: git checkout 2f94510 && PYTHONPATH=src python3 scripts/build_site.py , then open trial/trial_4e255c994c7f449a. Re-running the agent live requires EVAL_PLATFORM_ENABLE_OAUTH_SMOKE=1 and is non-deterministic.

Trial trial_4e255c994c7f449a · verifier authoritative; classifier explanatory.