SyncValsverifier → artifact → classifier → verdict
SyncVals · Trajectory

car-scene-assembly

claude-code claude-opus-4-8 ✗ 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.
SubtypeIncomplete Understanding
EvidenceInstruction explicitly specifies: 'enable region_rect so it crops Rect2(291, 0, 70, 133)'. Agent instead selected Rect2(0, 0, 70, 131) based on their own image analysis of the spritesheet. Test expects REGION := Rect2(291, 0, 70, 133) (test.gd line 5) and fails when region_rect != REGION. Agent's trajectory shows extensive image analysis work (steps 12-21) to identify what they thought was 'a clean forward-facing car' but chose the wrong sprite from the spritesheet rather than using the explicitly specified coordinates.
Root causeThe agent misinterpreted the instruction as a puzzle requiring image analysis to find 'the correct car' rather than using the explicit Rect2(291, 0, 70, 133) coordinates specified in the instruction. Despite doing sophisticated image analysis to select a sprite region, the agent selected the wrong car (top-left) instead of the one at pixel position (291, 0).
RecommendationN/A - task is fine. The instruction is clear and explicit about which region to use. The agent simply failed to follow the numerical specification, choosing instead to do their own image analysis and pick a different sprite.
Trajectory
Tool-by-tool agent trajectory
44 tool calls · 3 tool types · 44 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.
I'll start by examining the existing scene file and the asset to understand what I'm working with.
Bash
cat /home/user/task/scenes/car.tscn; echo "---ASSETS---"; ls -la /home/user/task/assets/ 2>/dev/null; echo "---IMPORT---"; ls -la /home/user/task/assets/spritesheet_vehicles.png* 2>/dev/null

{
  "description": "Read car.tscn and list assets"
}
output
[gd_scene load_steps=1 format=3 uid="uid://codexcarsetupscene"]

[node name="Car" type="CharacterBody2D"]
---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
---IMPORT---
-rw-r--r-- 1 user user 102392 Jun 20 23:26 /home/user/task/assets/spritesheet_vehicles.png
-rw-r--r-- 1 user user    800 Jun 21 02:10 /home/user/task/assets/spritesheet_vehicles.png.import

[stdout]
[gd_scene load_steps=1 format=3 uid="uid://codexcarsetupscene"]

[node name="Car" type="CharacterBody2D"]
---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
---IMPORT---
-rw-r--r-- 1 user user 102392 Jun 20 23:26 /home/user/task/assets/spritesheet_vehicles.png
-rw-r--r-- 1 user user    800 Jun 21 02:10 /home/user/task/assets/spritesheet_vehicles.png.import
Read
{
  "file_path": "/home/user/task/assets/spritesheet_vehicles.png"
}
output
{"type": "image", "source": {"type": "base64", "data": "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…[truncated]
Bash
cat /home/user/task/assets/spritesheet_vehicles.png.import; echo "---DIM---"; python3 -c "from PIL import Image; im=Image.open('/home/user/task/assets/spritesheet_vehicles.png'); print(im.size)" 2>/dev/null || file /home/user/task/assets/spritesheet_vehicles.png

{
  "description": "Read import file and image dimensions"
}
output
Exit code 127
[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
---DIM---
/bin/bash: line 1: file: command not found

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

{
  "description": "Parse PNG dimensions"
}
output
size 1024 512

[stdout]
size 1024 512
I need to find a clean car sprite's bounding box. Let me decode the PNG to analyze sprite boundaries by alpha.
Bash
python3 -c "
import zlib, struct
f=open('/home/user/task/assets/spritesheet_vehicles.png','rb').read()
# parse chunks
i=8
W=H=0; bitd=ct=0; idat=b''
while i<len(f):
    ln=struct.unpack('>I',f[i:i+4])[0]
    typ=f[i+4:i+8]
    data=f[i+8:i+8+ln]
    if typ==b'IHDR':
        W,H,bitd,ct=struct.unpack('>IIBB',data[:10])
    elif typ==b'IDAT':
        idat+=data
    elif typ==b'IEND':
        break
    i+=12+ln
print('W,H,bitdepth,colortype',W,H,bitd,ct)
raw=zlib.decompress(idat)
ch=4 if ct==6 else 3
stride=W*ch
# unfilter
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)
out=bytearray()
prev=bytearray(stride)
pos=0
for y in range(H):
    ft=raw[pos]; pos+=1
    line=bytearray(raw[pos:pos+stride]); pos+=stride
    for x in range(stride):
        a=line[x-ch] if x>=ch else 0
        b=prev[x]
        c=prev[x-ch] if x>=ch else 0
        if ft==1: line[x]=(line[x]+a)&255
        elif ft==2: line[x]=(line[x]+b)&255
        elif ft==3: line[x]=(line[x]+((a+b)>>1))&255
        elif ft==4: line[x]=(line[x]+paeth(a,b,c))&255
    out+=line
    prev=line
# alpha channel
import sys
alpha=[[out[(y*W+x)*ch+3] for x in range(W)] for y in range(H)]
# save alpha as simple bbox finder: find connected non-transparent columns/rows for top-left region
# print a coarse 32x16 grid of occupancy
gx,gy=32,16
cw=W//gx; chh=H//gy
for ry in range(gy):
    row=''
    for rx in range(gx):
        s=0
        for yy in range(ry*chh,(ry+1)*chh,4):
            for xx in range(rx*cw,(rx+1)*cw,4):
                if alpha[yy][xx]>20: s+=1
        row+= ('#' if s>3 else '.')
    print(row)
import pickle
pickle.dump((W,H,alpha),open('/tmp/alpha.pkl','wb'))
"

{
  "description": "Decode PNG alpha and print occupancy grid"
}
output
W,H,bitdepth,colortype 1024 512 8 6
#####################...........
#####################...........
######################..........
######################..........
######################..........
######################..........
#####################...........
#####################...........
#####################...........
#####################...........
#####################...........
######################..........
######################..........
#####################...........
##################.##...........
##################.##...........

[stdout]
W,H,bitdepth,colortype 1024 512 8 6
#####################...........
#####################...........
######################..........
######################..........
######################..........
######################..........
#####################...........
#####################...........
#####################...........
#####################...........
#####################...........
######################..........
######################..........
#####################...........
##################.##...........
##################.##...........
Bash
python3 -c "
import pickle
W,H,alpha=pickle.load(open('/tmp/alpha.pkl','rb'))
# find fully (or near) transparent columns in top band y 0..130 to find left sprite separators
def colgap(y0,y1):
    res=[]
    for x in range(W):
        s=sum(1 for y in range(y0,y1) if alpha[y][x]>20)
        res.append(s)
    return res
# Overall column occupancy
cols=[sum(1 for y in range(H) if alpha[y][x]>20) for x in range(W)]
# print empty-ish column ranges
empty=[x for x in range(W) if cols[x]==0]
# group
def groups(lst):
    g=[]; 
    for v in lst:
        if g and v==g[-1][-1]+1: g[-1].append(v)
        else: g.append([v])
    return [(gg[0],gg[-1]) for gg in g]
print('empty col groups:', groups(empty)[:40])
rows=[sum(1 for x in range(W) if alpha[y][x]>20) for y in range(H)]
emptyr=[y for y in range(H) if rows[y]==0]
print('empty row groups:', groups(emptyr)[:40])
"

{
  "description": "Find transparent separator columns/rows"
}
output
empty col groups: [(690, 1022)]
empty row groups: []

[stdout]
empty col groups: [(690, 1022)]
empty row groups: []
Bash
python3 -c "
import pickle
W,H,alpha=pickle.load(open('/tmp/alpha.pkl','rb'))
def groups_lowcols(y0,y1,thresh):
    cols=[sum(1 for y in range(y0,y1) if alpha[y][x]>20) for x in range(W)]
    low=[x for x in range(min(700,W)) if cols[x]<=thresh]
    g=[]
    for v in low:
        if g and v==g[-1][-1]+1: g[-1].append(v)
        else: g.append([v])
    return [(gg[0],gg[-1]) for gg in g]
# Top band only (first car row, y 0..128)
print('top band y0-128 low cols (gaps):', groups_lowcols(2,126,1))
# find row gaps for left column x 0..72
rows=[sum(1 for x in range(0,72) if alpha[y][x]>20) for y in range(H)]
low=[y for y in range(H) if rows[y]<=1]
g=[]
for v in low:
    if g and v==g[-1][-1]+1: g[-1].append(v)
    else: g.append([v])
print('left col x0-72 row gaps:', [(gg[0],gg[-1]) for gg in g])
"

{
  "description": "Find low-occupancy gaps in top band and left column"
}
output
top band y0-128 low cols (gaps): [(675, 699)]
left col x0-72 row gaps: [(501, 510)]

[stdout]
top band y0-128 low cols (gaps): [(675, 699)]
left col x0-72 row gaps: [(501, 510)]
Bash
python3 -c "
import pickle
W,H,alpha=pickle.load(open('/tmp/alpha.pkl','rb'))
cols=[sum(1 for y in range(2,126) if alpha[y][x]>20) for x in range(0,260)]
# print as compact numbers every column, marking low points
for x in range(0,260,1):
    pass
# instead print local minima
line=''.join(str(min(9,cols[x]//13)) for x in range(0,260))
print(line)
"

{
  "description": "Print column occupancy profile top band"
}
output
24899999999999999999999999999999999999999999999999999999999999999999842222489999999999999999999999999999999999999999999999999999999999999999984222247788889999999999999999999999999999999999999999999999999999999888887422227888999999999999999999999999999999999999

[stdout]
24899999999999999999999999999999999999999999999999999999999999999999842222489999999999999999999999999999999999999999999999999999999999999999984222247788889999999999999999999999999999999999999999999999999999999888887422227888999999999999999999999999999999999999
Bash
python3 -c "
import pickle
W,H,alpha=pickle.load(open('/tmp/alpha.pkl','rb'))
cols=[sum(1 for y in range(2,126) if alpha[y][x]>20) for x in range(0,260)]
for x in range(60,90): print(x,cols[x])
print('---rows for x in 0..70 (find top car vertical bbox)---')
rows=[sum(1 for x in range(0,72) if alpha[y][x]>20) for y in range(0,150)]
for y in range(0,150):
    if y<5 or rows[y]<10 or (130<y<150): print(y,rows[y])
"

{
  "description": "Find exact minima and vertical bbox"
}
output
60 124
61 124
62 123
63 123
64 122
65 121
66 120
67 118
68 115
69 61
70 35
71 35
72 31
73 31
74 64
75 115
76 117
77 120
78 121
79 122
80 123
81 123
82 124
83 124
84 124
85 124
86 124
87 124
88 124
89 124
---rows for x in 0..70 (find top car vertical bbox)---
0 27
1 46
2 53
3 57
4 59
131 26
132 27
133 27
134 46
135 53
136 57
137 59
138 61
139 63
140 64
141 65
142 67
143 67
144 67
145 69
146 69
147 69
148 69
149 69

[stdout]
60 124
61 124
62 123
63 123
64 122
65 121
66 120
67 118
68 115
69 61
70 35
71 35
72 31
73 31
74 64
75 115
76 117
77 120
78 121
79 122
80 123
81 123
82 124
83 124
84 124
85 124
86 124
87 124
88 124
89 124
---rows for x in 0..70 (find top car vertical bbox)---
0 27
1 46
2 53
3 57
4 59
131 26
132 27
133 27
134 46
135 53
136 57
137 59
138 61
139 63
140 64
141 65
142 67
143 67
144 67
145 69
146 69
147 69
148 69
149 69
Bash
python3 -c "
import pickle
W,H,alpha=pickle.load(open('/tmp/alpha.pkl','rb'))
x0,x1,y0,y1=0,73,0,131
minx=miny=10**9; maxx=maxy=-1
for y in range(y0,y1):
    for x in range(x0,x1):
        if alpha[y][x]>30:
            minx=min(minx,x); maxx=max(maxx,x); miny=min(miny,y); maxy=max(maxy,y)
print('tight bbox: x',minx,maxx,'y',miny,maxy,'w',maxx-minx+1,'h',maxy-miny+1)
"

{
  "description": "Tight bbox of top-left car"
}
output
tight bbox: x 0 72 y 0 130 w 73 h 131

[stdout]
tight bbox: x 0 72 y 0 130 w 73 h 131
I've identified the top-left dark sedan as a clean forward-facing (pointing-up) car sprite with a tight bounding box of `Rect2(0, 0, 73, 131)`, and got the texture UID (`uid://4j3r3nq5e1ub`). Now I'll write the scene.
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 = 30.0\nheight = 126.0\n\n[node name=\"Car\" type=\"CharacterBody2D\"]\n\n[node name=\"Sprite2D\" type=\"Sprite2D\" parent=\".\"]\nrotation = 1.5707964\ntexture = ExtResource(\"1_car\")\nregion_enabled = true\nregion_rect = Rect2(0, 0, 73, 131)\n\n[node name=\"CollisionShape2D\" type=\"CollisionShape2D\" parent=\".\"]\nrotation = 1.5707964\nshape = SubResource(\"CapsuleShape2D_car\")\n\n[node name=\"Camera2D\" type=\"Camera2D\" parent=\".\"]\n"
}
output
<tool_use_error>File has not been read yet. Read it first before writing to it.</tool_use_error>

[error] tool reported failure
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
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 = 30.0\nheight = 126.0\n\n[node name=\"Car\" type=\"CharacterBody2D\"]\n\n[node name=\"Sprite2D\" type=\"Sprite2D\" parent=\".\"]\nrotation = 1.5707964\ntexture = ExtResource(\"1_car\")\nregion_enabled = true\nregion_rect = Rect2(0, 0, 73, 131)\n\n[node name=\"CollisionShape2D\" type=\"CollisionShape2D\" parent=\".\"]\nrotation = 1.5707964\nshape = SubResource(\"CapsuleShape2D_car\")\n\n[node name=\"Camera2D\" type=\"Camera2D\" parent=\".\"]\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)
Let me verify the chosen region actually isolates a clean forward-facing car by exporting that crop.
Bash
python3 -c "
import pickle,struct,zlib
W,H,alpha=pickle.load(open('/tmp/alpha.pkl','rb'))
# reuse: re-decode RGB too for the crop preview
f=open('/home/user/task/assets/spritesheet_vehicles.png','rb').read()
i=8; idat=b''; ct=6
while i<len(f):
    ln=struct.unpack('>I',f[i:i+4])[0]; typ=f[i+4:i+8]; data=f[i+8:i+8+ln]
    if typ==b'IDAT': idat+=data
    if typ==b'IEND': break
    i+=12+ln
raw=zlib.decompress(idat); ch=4; stride=W*ch
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)
out=bytearray(); prev=bytearray(stride); pos=0
for y in range(H):
    ft=raw[pos]; pos+=1; line=bytearray(raw[pos:pos+stride]); pos+=stride
    for x in range(stride):
        a=line[x-ch] if x>=ch else 0; b=prev[x]; c=prev[x-ch] if x>=ch else 0
        if ft==1: line[x]=(line[x]+a)&255
        elif ft==2: line[x]=(line[x]+b)&255
        elif ft==3: line[x]=(line[x]+((a+b)>>1))&255
        elif ft==4: line[x]=(line[x]+paeth(a,b,c))&255
    out+=line; prev=line
# crop region 0,0,73,131 -> write png
rx,ry,rw,rh=0,0,73,131
def png(wd,ht,pix):
    sig=b'\x89PNG\r\n\x1a\n'
    def chunk(t,d): return struct.pack('>I',len(d))+t+d+struct.pack('>I',zlib.crc32(t+d)&0xffffffff)
    ihdr=struct.pack('>IIBBBBB',wd,ht,8,6,0,0,0)
    rawd=bytearray()
    for y in range(ht):
        rawd.append(0); rawd+=pix[y*wd*4:(y+1)*wd*4]
    return sig+chunk(b'IHDR',ihdr)+chunk(b'IDAT',zlib.compress(bytes(rawd),9))+chunk(b'IEND',b'')
crop=bytearray()
for y in range(ry,ry+rh):
    for x in range(rx,rx+rw):
        o=(y*W+x)*4; crop+=out[o:o+4]
open('/tmp/crop.png','wb').write(png(rw,rh,crop))
print('wrote /tmp/crop.png', rw, rh)
"

{
  "description": "Export the cropped region for verification"
}
output
wrote /tmp/crop.png 73 131

[stdout]
wrote /tmp/crop.png 73 131
Read
{
  "file_path": "/tmp/crop.png"
}
output
{"type": "image", "source": {"type": "base64", "data": "iVBORw0KGgoAAAANSUhEUgAAAEkAAACDCAYAAADBADYOAAAKiElEQVR42u1dy2uVRxTPH9DSBrsvbrIRVG4S06SJmtr4qhqNJr7aKkXrokiwiq0IxlIFKagl7cL6qGCtdGPFLrRgQS1YEC3pSrAiCsYuXBjxhU+m9zc4l8nceZz5Hvd+8+UO/Mgi95s55/fN48w5c+arq0upTJk8eQBoKxQOtzQ2no0KUU8JEyeuam1uniajLmulvr7+DQgGYbnQhcIJKNPW3MyyAk5uUS6Z1Lbx499OlRjeSLFHFDGSJTKigJNXJC4xciY0NExqbWoaCp0YLYovvKmpqTvenFJkO44Qs2bMYB/Mns26581jSxYtigzUIeP96dPZe1OnljC9vT0uWYcTJ+jjFSvYt7t3s4P793P8ffkyx3+3bzOUO3fusL179rCPVq6sGNAe2kWBHEKmX44d4zJC3s/WrUuOKHRBXUVfb99eIkJXHj58yH49fryi5KhA+5DDVCA/SNPp19zUtJe8crUUCjfkh2d2drLzZ88yW/nz/Hm2bu1apxIfFnvh8qVLS1jW18f6Fi/2Bp7D87o2IAfksZV/r17lepWRRVkBuV2jPIgKTeXKlSts65YtJQKE0r09Paynu5sDc1JaEG1g7hLkrVy+nMsDuSCfD1EwHawEgUWVoG1bt2obEPOOIGXh/PmpkhEFeFFLe3tHzVdq2bVzZ1lvshqnai+a2trKVixbxnbu2FFqRMw7aDyLxOgAOSGvPF/hL8iDftCTPImrcxEakMf5T0eO8L94QyGQo+tZkB9kyfMn/qf2JszNWqNR/lF7SwtnWZ0UMVmGSJCAbrKHntBX1l9rZKpDDQabbuVYvHBh0CRBfp1e0NdpDqgb1Plz52orC5kgAZ1e0Ne5yqnzEVasvA0125CDvuq+rnz5VyYuHdt5JgnQTd6lCZy7QaR/YsM4FklSN8rCoffa+o5pZSRhZz0WSYLeRpLUHT9cHLpKsFTmgSSdaQNA71HOOXheixi3YcqqsuUfPhvTBjWvqxsAvUeR9Mqn/ubn7wzUSEqapEULFgRNEORPnaS0XR9pA/KnTlJetyWJkgTLNGSSdDuJGklpkTSnq8tYETyRIZME+SORRLW48+pPEkDn0JHktS2JY3XLznq4UiEsAgfUUJEcWUE9UVdZk7Xt3JZQN7gUgxL+ZDlyUYlYGwgUERqX391Wj5UkuAMorhIbSXizfUuWlMI51QLaFz1OZ/hGIamu95W7xIck0ThsDgwdn2EjggqIwPiCEvzUkQYZIavN2gbUqEnZ2Sf1SI1tqbSNawEEBqHY76dP8wAhYAs/+xTUI+pE/WhHBEhdhNn+r3YUp48b8wr1bcmEmIKAlSpo34e4WCTZ9jjAhv5+Hm+vNikU0iAn5LXpQ/JxI4RCtbqBEItNH4wcZ7TEZ2uSR5IwchInyXZaI4sF8tr0Ubck2uCk6ue2Wd3A5UuXgiIJ8vqQhE6jP13rQRIOHYRUXCfw1DC39nSuL0k4YRJSgby+1rbzABdOWdgqhR0SUoG8Nn10gUn9STePrQnsDt/y4sUL9uzZM44nT56wx48fk4Hfi2dRj29x2UlOQ9JEksuMV8vLly+5Ek+fPuWKYftw//59du/ePXb37t3EgXpRP9pBe2gX7UMOn+UfekYmybZ/A65fv1560xA2DSKiAvII2SCn1ZDs6aGTpG5NXLbSxYsXM0WMCZDTZ/m3nsBVSZozc6bV3fnz0aNBkAQ5bQ476BmLJJs34OCBA0GQBDlte7bYJMG5ZnKqfTUwEARJkNOUnQD9vEji+WzSj7s6O3kl8OzpGvly8+YgSIKcOvmhF/TrUrICrDkmuhO4rtBwCCS5QvZlWxLdvs1Fks2Bfu3atUwTBPlcAY3ESDKtclk3A0zLvxxkTYwkk2GJ3bXrTUJQgdOnTvElOSrwvFyfqyebdv/ymYbESDL5vL/ZtYsNDw9zgaHEd4ODfDUBPl2zpmLxNtEm5IEcgkDT8i9HgP1IUhxvnR0d5MBeaJD1mtbWRk/lUn1KeFiurNrR2SSjvKmRVKnYftpQjw8lSpLLKxAK1INoiZLkE9WVgQlcTKhidfK1r8QqKVZH1Bd1YYAeqZHkiuqq6F+/PnVPAepHOz5yqWebEiUJZ3+ogsAUqKTRiPaosqlnmBIliWoGYBjAdqokSWiPOvxUnapCUrVcKCaXSI2kLJJkc+eGQJLu9HCNpBpJNZJqJOWaJMpx5CyTJCIkVTcBsE2oBknU7UkmSALOnTtXUYKw8Y3icKsqSSLCG8efTYUtQps4Sc2Njf02962vFyCriOUFsAUCXEHKkKDmESdKUs0zSSDJdCYgNIgzACaSrFe9ukiiGJIhQDUoEwtO5jnu5kWS6eiN6/qKECFnVXqRZDrEJa4fzBNJ8jWQiZGUl0lbN3knRlJeQty6ULfXSTcTSXmbj9R5ye/MpHLgG3cvUucj5LviLBDww7593vmvcYH20K6QgXIvuJiXYpFEuZXBlSQoMq4hNDKF4qSvi2dlMmzJia76xG0ZsUmiRm2zWCi9GfqRSdLdxU0daugVIaZviSGnXulqzC0x+ZIoQy2ruW+uREB5yEUmiTrUMEeEmFIqDzkSSeoXJkAS1YDMaj4uLk2gWt+kDyqom1sYWNSLWrKa/u5Kc5cNS5JPSSVp7qxZ5KX55s2bmb2Cg6oDXNVOktRrOEyXluuAlM7nz59niiDIA7moOpTde6vbv0W99UaOsY2MjLAHDx7wpOIoycRxCtpDu2gfcvjG4kiXJ0QlyRWtRTLxo0ePnInElKImQqNeVxK0z5klp0Gpfp6MYh+FkGJqSy31vvXG504AnwScaoNqK+EAvNNW8rldIg+pXN4XKKi3A7ruKclLUiD54jvcDuh7mUte0ktjXcbpujQhL9ncFFupdK2rum+jkiSCfNu3bWN/nDmTKWIgD+TyCaqaLgh+fUNLd9mWhBqIVCOhn6xezX48dIj9deFCVYhBu2gfckSJPOtsJUB71TTVkLTdqIwl9fvBQfbbyZPsn6GhVEhBvagf7diuwKaSpLOVSiRFtbZ9r53evGkTVwhDAW99+NYtWt5I8Xf4PZ7D86gnqeulrXdNvsK4Te+eLSMp6sGDEO/gdtlKJZLULUmNpNF4a1PbUOQtyZgh6YsOViOpRlKNpMqRRPmU4lggCT40HUn1G9tuVMxOyjpJqjE5ygSYUiiciBIEyBtJui+Ycot7Y/uJsm2J6UuBeSdJ9QLwM6RF8G2J6gUwfU1ZN4bFV9az9t03yCNko/rr1a8qI40E4F4A07GbKIepIBDC45j8hZBpfRNO1I00CPExGSohLg+ACHWPCnerx5PFF97TOmweBWnJo3PdYsV3XjDl+jpXnqA624yXlus+PR1n2IWUGVA2zAqFkdKXlF1nlOQelWZXrwagj/qpMnnCrrMVdW6SVzxUGno6FyZ3DC91JZOX/TpKUS1wHTDR4SQ9GpQBqzXqZVRJ5LGhbSELQkQC6sSsA/xqxmHm06N8IQsKoDeqxPoCdfgS4AS1B+mOCFJ6VciAftZMSWrhE3qRadXNGyqgBw6tJUKOizj0NBHAExCbwqr0iqIJw9suvlDIAvlEqDp1QuKSKQPLq0psFMh1TmhomJS2Hv8DDXS/bkxlSosAAAAASUVORK5CYII=", "media_type": "image/png"}}
The crop is a clean forward-facing car, but there's a faint green sliver from the neighbor at the top-right. Let me tighten the width slightly and confirm.
Bash
python3 -c "
import pickle,struct,zlib
W,H,alpha=pickle.load(open('/tmp/alpha.pkl','rb'))
f=open('/home/user/task/assets/spritesheet_vehicles.png','rb').read()
i=8; idat=b''
while i<len(f):
    ln=struct.unpack('>I',f[i:i+4])[0]; typ=f[i+4:i+8]; data=f[i+8:i+8+ln]
    if typ==b'IDAT': idat+=data
    if typ==b'IEND': break
    i+=12+ln
raw=zlib.decompress(idat); ch=4; stride=W*ch
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)
out=bytearray(); prev=bytearray(stride); pos=0
for y in range(H):
    ft=raw[pos]; pos+=1; line=bytearray(raw[pos:pos+stride]); pos+=stride
    for x in range(stride):
        a=line[x-ch] if x>=ch else 0; b=prev[x]; c=prev[x-ch] if x>=ch else 0
        if ft==1: line[x]=(line[x]+a)&255
        elif ft==2: line[x]=(line[x]+b)&255
        elif ft==3: line[x]=(line[x]+((a+b)>>1))&255
        elif ft==4: line[x]=(line[x]+paeth(a,b,c))&255
    out+=line; prev=line
def png(wd,ht,pix):
    sig=b'\x89PNG\r\n\x1a\n'
    def chunk(t,d): return struct.pack('>I',len(d))+t+d+struct.pack('>I',zlib.crc32(t+d)&0xffffffff)
    ihdr=struct.pack('>IIBBBBB',wd,ht,8,6,0,0,0)
    rawd=bytearray()
    for y in range(ht):
        rawd.append(0); rawd+=pix[y*wd*4:(y+1)*wd*4]
    return sig+chunk(b'IHDR',ihdr)+chunk(b'IDAT',zlib.compress(bytes(rawd),9))+chunk(b'IEND',b'')
rx,ry,rw,rh=0,0,70,131
crop=bytearray()
for y in range(ry,ry+rh):
    for x in range(rx,rx+rw):
        o=(y*W+x)*4; crop+=out[o:o+4]
open('/tmp/crop2.png','wb').write(png(rw,rh,crop)); print('ok',rw,rh)
"

{
  "description": "Re-crop at width 70"
}
output
ok 70 131

[stdout]
ok 70 131
Read
{
  "file_path": "/tmp/crop2.png"
}
output
{"type": "image", "source": {"type": "base64", "data": "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", "media_type": "image/png"}}
Clean isolation now. I'll update the region width to 70.
Edit
{
  "replace_all": false,
  "file_path": "/home/user/task/scenes/car.tscn",
  "old_string": "region_rect = Rect2(0, 0, 73, 131)",
  "new_string": "region_rect = Rect2(0, 0, 70, 131)"
}
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)
The scene is assembled. Here's what `scenes/car.tscn` now contains: **`Car`** (`CharacterBody2D`, root) with three children: 1. **`Sprite2D`** (first child) , uses `res://assets/spritesheet_vehicles.png` via `ExtResource`, with `region_enabled = true` and `region_rect = Rect2(0, 0, 70, 131)` isolating the top-left dark sedan (a clean, forward-pointing car sprite I verified by cropping). Rotated 90° (`rotation = 1.5707964` rad) so it faces forward (+X in Godot). 2. **`CollisionShape2D`** (sibling, default position `0,0`) , a `CapsuleShape2D` (`radius = 30`, `height = 126`) closely matching the ~60-wide × ~131-long car body, also rotated 90° so its long axis aligns with the rotated sprite. 3. **`Camera2D`** , child of `Car`, at the origin with no offset (defaults). I picked the region by decoding the spritesheet's alpha channel to find sprite boundaries (the cars are tightly packed with no transparent gutters), measured the top-left car's tight bounding box, then trimmed the width from 73→70 to drop a faint sliver of the neighboring green car. The exported crop confirmed a clean, single forward-facing car.
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: Wrong car selected , find the correct forward-facing vertical car body in the spritesheet

Reproduce this trial: git checkout 2f94510 && PYTHONPATH=src python3 scripts/build_site.py , then open trial/trial_3de822d4cc7d4fbc. Re-running the agent live requires EVAL_PLATFORM_ENABLE_OAUTH_SMOKE=1 and is non-deterministic.

Trial trial_3de822d4cc7d4fbc · verifier authoritative; classifier explanatory.