Run 3eb89892

# attempt undefined — model: @cf/zai-org/glm-4.7-flash — exit 0 — accepted — cost 0.0009 USD — 16315 ms
# verifier: PASS — simple buffer geometry verified
# artifact: download (6171 bytes)
import geopandas as gpd

# Read the input parcels file
parcels = gpd.read_file("parcels.geojson")

# Create a 25 metre buffer around each parcel
# The CRS is projected (EPSG:3857), so the distance is in meters
parcels['geometry'] = parcels['geometry'].buffer(25)

# Write the buffered features to the output file
parcels.to_file("simple_buffers.geojson")
architecture=single-retry
stage=single-code-generation
--- execution stdout ---

# attempt undefined — model: @cf/zai-org/glm-4.7-flash — exit 0 — accepted — cost 0.0009 USD — 19929 ms
# verifier: PASS — simple buffer geometry verified
# artifact: download (6123 bytes)
import geopandas as gpd

# Read the input file
parcels = gpd.read_file("parcels.geojson")

# Ensure the CRS is set to EPSG:3857 (Projected, meters)
parcels = parcels.set_crs(epsg=3857, allow_override=True)

# Create a 25 metre buffer around each parcel
buffers = parcels.buffer(25)

# Write the buffered features to the output file
buffers.to_file("simple_buffers.geojson")
architecture=single-shot
stage=single-code-generation
--- execution stdout ---

# attempt undefined — model: @cf/zai-org/glm-4.7-flash — exit 1 — rejected — cost 0.0014 USD — 26459 ms
# verifier: FAIL — simple buffer inputs unreadable
# no artifact produced
import geopandas as gpd

# Read the input file
gdf = gpd.read_file("parcels.geojson")

# Ensure the CRS is EPSG:3857 as requested
if gdf.crs is None:
    gdf = gdf.set_crs("EPSG:3857")

# Create a 25 metre buffer around every parcel
buffered_gdf = gdf.buffer(distance=25, unit='m')

# Write the output file
buffered_gdf.to_file("simple_buffers.geojson")
architecture=single-shot
stage=single-code-generation
--- execution stdout ---

--- stderr ---
Traceback (most recent call last):
  File "/tmp/arena/solution.py", line 11, in <module>
    buffered_gdf = gdf.buffer(distance=25, unit='m')
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/geopandas/base.py", line 5441, in buffer
    return _delegate_geo_method(
           ^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/geopandas/base.py", line 129, in _delegate_geo_method
    data = getattr(a_this, op)(**kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/geopandas/array.py", line 904, in buffer
    shapely.buffer(self._data, distance, quad_segs=resolution, **kwargs),
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/shapely/decorators.py", line 173, in wrapper
    result = func(*args, **kwargs)
             ^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/shapely/decorators.py", line 88, in wrapped
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/shapely/constructive.py", line 246, in buffer
    return lib.buffer(
           ^^^^^^^^^^^
TypeError: buffer() got an unexpected keyword argument 'unit'

# attempt undefined — model: @cf/zai-org/glm-4.7-flash — exit 0 — accepted — cost 0.0008 USD — 31182 ms
# verifier: PASS — simple buffer geometry verified
# artifact: download (6171 bytes)
import geopandas as gpd

# Read the input parcels file
gdf = gpd.read_file("parcels.geojson")

# Create a 25 metre buffer for each parcel
gdf['geometry'] = gdf.buffer(25)

# Write the buffered features to the output file
gdf.to_file("simple_buffers.geojson")
architecture=single-shot
stage=single-code-generation
--- execution stdout ---

# attempt undefined — model: @cf/zai-org/glm-4.7-flash — exit 0 — accepted — cost 0.0007 USD — 18277 ms
# verifier: PASS — simple buffer geometry verified
# artifact: download (6123 bytes)
import geopandas as gpd

# Read the input parcels file
gdf = gpd.read_file('parcels.geojson')

# Create a 25 metre buffer around each parcel
# Since the input is in EPSG:3857 (meters), the distance is 25
buffered_gdf = gdf.buffer(25)

# Write the buffered geometries to the output file
buffered_gdf.to_file('simple_buffers.geojson')
architecture=single-retry
stage=single-code-generation
--- execution stdout ---

# attempt undefined — model: @cf/zai-org/glm-4.7-flash — exit 0 — accepted — cost 0.0009 USD — 23010 ms
# verifier: PASS — simple buffer geometry verified
# artifact: download (6123 bytes)
import geopandas as gpd

# Read the input parcels file
parcels = gpd.read_file("parcels.geojson")

# Create a 25 metre buffer around each parcel
# The CRS is 3857 (meters), so the distance is interpreted correctly
buffers = parcels.buffer(25)

# Create a new GeoDataFrame with the buffered geometries
# Preserve the original CRS and attributes
buffers_gdf = gpd.GeoDataFrame(geometry=buffers, crs=parcels.crs)

# Write the output file
buffers_gdf.to_file("simple_buffers.geojson")
architecture=single-retry
stage=single-code-generation
--- execution stdout ---

# attempt undefined — model: @cf/zai-org/glm-4.7-flash — exit 0 — accepted — cost 0.0018 USD — 25218 ms
# verifier: PASS — simple buffer geometry verified
# artifact: download (6171 bytes)
import geopandas as gpd

def main():
    # Read the input file
    gdf = gpd.read_file('parcels.geojson')

    # Apply a 25 metre buffer to all geometries
    # Since the input is in EPSG:3857 (meters), the distance is directly 25
    gdf['geometry'] = gdf.buffer(25)

    # Write the output file preserving the CRS
    gdf.to_file('simple_buffers.geojson', driver='GeoJSON')

if __name__ == '__main__':
    main()
architecture=plan-then-act
stage=planner
plan=```json
{
  "steps": [
    "Read the input file 'parcels.geojson' into a GeoDataFrame.",
    "Apply a 25-meter buffer to all geometries in the GeoDataFrame.",
    "Write the resulting GeoDataFrame to 'simple_buffers.geojson'."
  ],
  "libraries": [
    "geopandas",
    "shapely"
  ],
  "validation": [
    "Check that 'simple_buffers.geojson' exists in the working directory.",
    "Verify the output GeoDataFrame has the same number of features as the input.",
    "Confirm the output CRS is EPSG:3857.",
    "Ensure all geometries in the output are valid and non-empty."
  ]
}
```
stage=act
--- execution stdout ---

# attempt undefined — model: @cf/zai-org/glm-4.7-flash — exit 0 — accepted — cost 0.0021 USD — 45955 ms
# verifier: PASS — simple buffer geometry verified
# artifact: download (6171 bytes)
import geopandas as gpd

# Load the input file
gdf = gpd.read_file('parcels.geojson')

# Apply a 25-meter buffer to each geometry
# Since the CRS is EPSG:3857 (meters), the distance is interpreted as meters
gdf['geometry'] = gdf.buffer(25)

# Write the output file
gdf.to_file('simple_buffers.geojson')
architecture=plan-then-act
stage=planner
plan=```json
{
  "steps": [
    "Load the 'parcels.geojson' file into a GeoDataFrame.",
    "Apply a 25-meter buffer to the geometry column using the buffer method.",
    "Write the resulting GeoDataFrame to 'simple_buffers.geojson'."
  ],
  "libraries": [
    "geopandas",
    "shapely"
  ],
  "validation": [
    "Confirm that 'simple_buffers.geojson' exists in the working directory.",
    "Verify the output file contains the same number of features as the input.",
    "Validate that the output CRS is EPSG:3857.",
    "Check that all geometries in the output are valid (non-empty)."
  ]
}
```
stage=act
--- execution stdout ---

# attempt undefined — model: @cf/zai-org/glm-4.7-flash — exit 0 — accepted — cost 0.0020 USD — 33210 ms
# verifier: PASS — simple buffer geometry verified
# artifact: download (6171 bytes)
import geopandas as gpd
import os

# Load the input parcels file
parcels = gpd.read_file('parcels.geojson')

# Apply a 25 metre buffer to each geometry
# The input is in EPSG:3857 (meters), so the distance is 25
parcels['geometry'] = parcels.buffer(25)

# Write the buffered geometries to the output file
parcels.to_file('simple_buffers.geojson')

# Basic validation
assert parcels.crs == 'EPSG:3857', "CRS not preserved"
assert os.path.exists('simple_buffers.geojson'), "Output file not created"
assert len(parcels) > 0, "No features in output"
architecture=plan-then-act
stage=planner
plan=```json
{
  "steps": [
    "Load 'parcels.geojson' into a GeoDataFrame.",
    "Apply a 25-meter buffer to the geometry column.",
    "Write the buffered GeoDataFrame to 'simple_buffers.geojson'."
  ],
  "libraries": [
    "geopandas",
    "shapely"
  ],
  "validation": [
    "Verify 'simple_buffers.geojson' exists.",
    "Confirm the output CRS is EPSG:3857.",
    "Check that the number of features matches the input."
  ]
}
```
stage=act
--- execution stdout ---

# attempt undefined — model: @cf/zai-org/glm-4.7-flash — exit 0 — accepted — cost 0.0035 USD — 47079 ms
# verifier: PASS — simple buffer geometry verified
# artifact: download (6123 bytes)
import geopandas as gpd

# Load the input file
parcels = gpd.read_file('parcels.geojson')

# Apply a 25.0 meter buffer to the geometry column
buffered_parcels = parcels.buffer(25.0)

# Write the result to the output file, preserving the CRS
buffered_parcels.to_file('simple_buffers.geojson')
architecture=full-multi-agent
stage=planner
plan=```json
{
  "steps": [
    "Load 'parcels.geojson' into a GeoDataFrame using geopandas.",
    "Apply a 25.0 meter buffer to the 'geometry' column using shapely.buffer.",
    "Write the resulting GeoDataFrame to 'simple_buffers.geojson' preserving the CRS."
  ],
  "libraries": [
    "geopandas",
    "shapely"
  ],
  "validation": [
    "Verify 'simple_buffers.geojson' exists in the working directory.",
    "Confirm the output file contains the same number of features as the input.",
    "Confirm the output CRS is EPSG:3857."
  ]
}
```
stage=builder
stage=auditor
auditor_output_present=true
--- execution stdout ---

# attempt undefined — model: @cf/zai-org/glm-4.7-flash — exit 0 — accepted — cost 0.0032 USD — 61631 ms
# verifier: PASS — simple buffer geometry verified
# artifact: download (6123 bytes)
import geopandas as gpd

def main():
    # Read the input file
    parcels = gpd.read_file('parcels.geojson')
    
    # Apply a 25-meter buffer to every parcel
    # The input is in EPSG:3857 (meters), so the distance is 25
    buffered_geoms = parcels.geometry.buffer(25)
    
    # Create a new GeoDataFrame containing only the buffered geometries
    # to ensure the output has one buffered feature per input parcel
    buffers = gpd.GeoDataFrame(geometry=buffered_geoms, crs=parcels.crs)
    
    # Write the output file, preserving the CRS
    buffers.to_file('simple_buffers.geojson')

if __name__ == "__main__":
    main()
architecture=full-multi-agent
stage=planner
plan=```json
{
  "steps": [
    "Read the input file 'parcels.geojson' into a GeoDataFrame using geopandas.",
    "Apply a 25-meter buffer to the geometry column of the GeoDataFrame.",
    "Write the buffered GeoDataFrame to the output file 'simple_buffers.geojson', preserving the CRS."
  ],
  "libraries": [
    "geopandas",
    "shapely"
  ],
  "validation": [
    "Confirm that 'simple_buffers.geojson' exists in the working directory.",
    "Verify that the output file is a valid GeoJSON structure.",
    "Check that the number of features in the output matches the input.",
    "Validate that the CRS of the output is EPSG:3857."
  ]
}
```
stage=builder
stage=auditor
auditor_output_present=true
--- execution stdout ---

# attempt undefined — model: @cf/zai-org/glm-4.7-flash — exit 0 — accepted — cost 0.0044 USD — 87376 ms
# verifier: PASS — simple buffer geometry verified
# artifact: download (6123 bytes)
import geopandas as gpd

# Load the input file
gdf = gpd.read_file('parcels.geojson')

# Ensure the CRS is EPSG:3857 as requested
if gdf.crs is None:
    gdf = gdf.set_crs('EPSG:3857')
elif gdf.crs.to_epsg() != 3857:
    gdf = gdf.to_crs('EPSG:3857')

# Apply a 25 metre buffer to all geometries
gdf['buffered'] = gdf.buffer(25)

# Write the resulting buffered GeoDataFrame to the output file
gdf[['buffered']].to_file('simple_buffers.geojson')
architecture=full-multi-agent
stage=planner
plan=```json
{
  "steps": [
    "Load the input file 'parcels.geojson' into a GeoDataFrame.",
    "Apply a 25-meter buffer to all geometries in the GeoDataFrame.",
    "Write the resulting buffered GeoDataFrame to 'simple_buffers.geojson'."
  ],
  "libraries": [
    "geopandas",
    "shapely"
  ],
  "validation": [
    "Check that 'simple_buffers.geojson' exists in the working directory.",
    "Verify the output GeoDataFrame has the same number of features as the input.",
    "Verify the output GeoDataFrame has a CRS of EPSG:3857."
  ]
}
```
stage=builder
stage=auditor
auditor_output_present=false
--- execution stdout ---

# attempt undefined — model: @cf/moonshotai/kimi-k2.6 — exit 0 — accepted — cost 0.0008 USD — 35687 ms
# verifier: PASS — simple buffer geometry verified
# artifact: download (6171 bytes)
import geopandas as gpd

parcels = gpd.read_file("parcels.geojson")
parcels["geometry"] = parcels.buffer(25)
parcels.to_file("simple_buffers.geojson", driver="GeoJSON")
architecture=single-shot
stage=single-code-generation
--- execution stdout ---

# attempt undefined — model: @cf/moonshotai/kimi-k2.6 — exit 0 — rejected — cost 0.0019 USD — 44204 ms
# verifier: FAIL — simple buffer inputs unreadable
# no artifact produced

architecture=single-shot
stage=single-code-generation
--- execution stdout ---

# attempt undefined — model: @cf/moonshotai/kimi-k2.6 — exit 0 — rejected — cost 0.0019 USD — 47905 ms
# verifier: FAIL — simple buffer inputs unreadable
# no artifact produced

architecture=single-shot
stage=single-code-generation
--- execution stdout ---

# attempt undefined — model: @cf/moonshotai/kimi-k2.6 — exit 0 — rejected — cost 0.0019 USD — 37069 ms
# verifier: FAIL — simple buffer inputs unreadable
# no artifact produced

architecture=single-retry
stage=single-code-generation
--- execution stdout ---

# attempt undefined — model: @cf/moonshotai/kimi-k2.6 — exit 0 — rejected — cost 0.0019 USD — 70934 ms
# verifier: FAIL — simple buffer inputs unreadable
# no artifact produced

architecture=single-retry
stage=single-code-generation
--- execution stdout ---

# attempt undefined — model: @cf/moonshotai/kimi-k2.6 — exit 0 — accepted — cost 0.0010 USD — 25501 ms
# verifier: PASS — simple buffer geometry verified
# artifact: download (6171 bytes)
import geopandas as gpd

gdf = gpd.read_file('parcels.geojson')
gdf.geometry = gdf.buffer(25)
gdf.to_file('simple_buffers.geojson', driver='GeoJSON')
architecture=single-retry
stage=single-code-generation
--- execution stdout ---

# attempt undefined — model: @cf/moonshotai/kimi-k2.6 — exit 0 — rejected — cost 0.0027 USD — 46359 ms
# verifier: FAIL — simple buffer inputs unreadable
# no artifact produced

architecture=plan-then-act
stage=planner
plan=```json
{
  "steps": [
    "Read parcels.geojson into a GeoDataFrame using geopandas.read_file() and verify the CRS is EPSG:3857.",
    "Apply a 25-metre buffer to every geometry in the GeoDataFrame using GeoDataFrame.geometry.buffer(25) or shapely.buffer, producing exactly one buffered feature per input parcel.",
    "Assign the buffered geometries back to the GeoDataFrame, ensuring the row count and index order remain identical to the input.",
    "Write the resulting GeoDataFrame to simple_buffers.geojson using GeoDataFrame.to_file(driver='GeoJSON'), preserving the original EPSG:3857 CRS.",
    "Confirm the output file was created successfully."
  ],
  "libraries": [
    "geopandas",
    "shapely"
  ],
  "validation": [
    "Assert input and output feature counts are identical (no drops or additions).",
    "Assert output GeoDataFrame CRS is EPSG:3857.",
    "Assert every output geometry is a valid Polygon or MultiPolygon and not null.",
    "Assert simple_buffers.geojson exists in the working directory."
  ]
}
```
stage=act
--- execution stdout ---

# attempt undefined — model: @cf/moonshotai/kimi-k2.6 — exit 0 — accepted — cost 0.0025 USD — 61929 ms
# verifier: PASS — simple buffer geometry verified
# artifact: download (6171 bytes)
import geopandas as gpd

gdf = gpd.read_file("parcels.geojson")

if gdf.crs is None:
    gdf = gdf.set_crs(epsg=3857)

buffered_gdf = gdf.copy()
buffered_gdf.geometry = buffered_gdf.geometry.buffer(25)

buffered_gdf.to_file("simple_buffers.geojson", driver="GeoJSON")
architecture=plan-then-act
stage=planner
plan={"steps":["Import geopandas","Read parcels.geojson into a GeoDataFrame","Confirm the GeoDataFrame CRS is EPSG:3857","Apply a 25-metre buffer to each geometry using gdf.geometry.buffer(25)","Construct a new GeoDataFrame with the buffered geometries, preserving all rows and the original CRS","Write the result to simple_buffers.geojson with the GeoJSON driver"],"libraries":["geopandas","shapely"],"validation":["simple_buffers.geojson exists on disk","Output feature count equals input feature count","Output CRS is EPSG:3857","No empty or null geometries in output","All buffered geometries are valid"]}
stage=act
--- execution stdout ---

# attempt undefined — model: @cf/moonshotai/kimi-k2.6 — exit 0 — rejected — cost 0.0019 USD — 50137 ms
# verifier: FAIL — simple buffer inputs unreadable
# no artifact produced

architecture=single-retry
stage=single-code-generation
--- execution stdout ---

# attempt undefined — model: @cf/moonshotai/kimi-k2.6 — exit 0 — rejected — cost 0.0019 USD — 99411 ms
# verifier: FAIL — simple buffer inputs unreadable
# no artifact produced

architecture=single-retry
stage=single-code-generation
--- execution stdout ---

# attempt undefined — model: @cf/moonshotai/kimi-k2.6 — exit 0 — accepted — cost 0.0026 USD — 69935 ms
# verifier: PASS — simple buffer geometry verified
# artifact: download (6171 bytes)
import geopandas as gpd
import os

input_file = 'parcels.geojson'
output_file = 'simple_buffers.geojson'

gdf = gpd.read_file(input_file)
assert gdf.crs is not None and gdf.crs.to_epsg() == 3857, 'Input CRS is not EPSG:3857'

gdf['geometry'] = gdf.buffer(25)
gdf = gdf.set_crs(epsg=3857, allow_override=True)

gdf.to_file(output_file, driver='GeoJSON')

assert os.path.exists(output_file), 'Output file missing'
out = gpd.read_file(output_file)
assert len(out) == len(gdf), 'Feature count mismatch'
assert out.crs is not None and out.crs.to_epsg() == 3857, 'Output CRS is not EPSG:3857'
assert out.geometry.isna().sum() == 0, 'Null geometries found'
assert out.is_valid.all(), 'Invalid geometries found'
architecture=plan-then-act
stage=planner
plan=```json
{
  "steps": [
    "Read parcels.geojson into a GeoDataFrame using geopandas.read_file() and verify the CRS is EPSG:3857.",
    "Apply a 25-metre buffer to every geometry using GeoDataFrame.buffer(25), producing one buffered geometry per input parcel.",
    "Construct a new GeoDataFrame (or update the existing one) using the buffered geometries, preserving all original rows and attributes.",
    "Explicitly assign the original EPSG:3857 CRS to the output GeoDataFrame to ensure it is preserved.",
    "Write the resulting GeoDataFrame to simple_buffers.geojson using to_file(driver='GeoJSON')."
  ],
  "libraries": [
    "geopandas",
    "shapely"
  ],
  "validation": [
    "Assert the output file simple_buffers.geojson exists.",
    "Assert the feature count in simple_buffers.geojson equals the feature count in parcels.geojson.",
    "Assert the output CRS is EPSG:3857.",
    "Assert no null geometries exist in the output and all geometries are valid."
  ]
}
```
stage=act
--- execution stdout ---

# attempt undefined — model: @cf/moonshotai/kimi-k2.6 — exit 0 — accepted — cost 0.0050 USD — 119008 ms
# verifier: PASS — simple buffer geometry verified
# artifact: download (6171 bytes)
import os
import geopandas as gpd
import shapely

input_path = "parcels.geojson"
output_path = "simple_buffers.geojson"

gdf = gpd.read_file(input_path)
assert gdf.crs is not None, "Input CRS is missing"
assert gdf.crs.to_string() == "EPSG:3857", f"Input CRS is not EPSG:3857: {gdf.crs}"

buffered = gdf.copy()
buffered.geometry = buffered.geometry.buffer(25)

assert len(buffered) == len(gdf), "Feature count changed after buffering"
assert buffered.geometry.notna().all(), "Null geometries after buffering"
assert buffered.geometry.is_valid.all(), "Invalid geometries after buffering"
assert buffered.crs.to_string() == "EPSG:3857", "Buffered CRS is not EPSG:3857"

buffered.to_file(output_path, driver="GeoJSON")

assert os.path.exists(output_path), "Output file was not created"

out_gdf = gpd.read_file(output_path)
assert len(out_gdf) == len(gdf), "Output feature count does not match input"
assert out_gdf.crs is not None and out_gdf.crs.to_string() == "EPSG:3857", "Output CRS is not EPSG:3857"
assert out_gdf.geometry.notna().all(), "Output contains null geometries"
assert out_gdf.geometry.is_valid.all(), "Output contains invalid geometries"
architecture=full-multi-agent
stage=planner
plan=```json
{
  "steps": [
    "Read parcels.geojson into a GeoDataFrame using geopandas.read_file().",
    "Verify the GeoDataFrame CRS is EPSG:3857 and preserve it.",
    "Apply a 25-metre buffer to every geometry using gdf.geometry.buffer(25).",
    "Construct a new GeoDataFrame (or update the existing one) replacing the original geometries with the buffered geometries, keeping all original rows and attributes intact.",
    "Write the resulting GeoDataFrame to simple_buffers.geojson using to_file(driver='GeoJSON') with CRS EPSG:3857."
  ],
  "libraries": [
    "geopandas",
    "shapely"
  ],
  "validation": [
    "Confirm simple_buffers.geojson was created and is readable.",
    "Assert the output feature count equals the input feature count (no drops).",
    "Assert the output CRS string is EPSG:3857.",
    "Assert every output geometry is a valid Polygon or MultiPolygon and none are null.",
    "Assert no input rows were lost and no new rows were fabricated."
  ]
}
```
stage=builder
stage=auditor
auditor_output_present=false
--- execution stdout ---

# attempt undefined — model: @cf/moonshotai/kimi-k2.6 — exit 0 — rejected — cost 0.0048 USD — 124554 ms
# verifier: FAIL — simple buffer inputs unreadable
# no artifact produced

architecture=full-multi-agent
stage=planner
plan=```json
{
  "steps": [
    "Read parcels.geojson into a GeoDataFrame using geopandas.read_file.",
    "Verify the input CRS is EPSG:3857 and store the original row count.",
    "Apply a 25-metre buffer to every geometry using GeoDataFrame.geometry.buffer(25), producing one buffered geometry per input parcel.",
    "Construct a new GeoDataFrame from the buffered geometries, preserving all original attributes and the EPSG:3857 CRS.",
    "Validate that the output GeoDataFrame has the same number of rows as the input and that all buffered geometries are valid.",
    "Write the result to simple_buffers.geojson using GeoDataFrame.to_file(driver='GeoJSON') with CRS preserved."
  ],
  "libraries": [
    "geopandas",
    "shapely"
  ],
  "validation": [
    "Assert simple_buffers.geojson exists on disk.",
    "Assert output feature count equals input parcels.geojson feature count.",
    "Assert output CRS string matches EPSG:3857.",
    "Assert no null geometries exist in the output.",
    "Assert all output geometries are valid Polygon or MultiPolygon types."
  ]
}
```
stage=builder
stage=auditor
auditor_output_present=false
--- execution stdout ---

# attempt undefined — model: @cf/moonshotai/kimi-k2.6 — exit 0 — accepted — cost 0.0051 USD — 137994 ms
# verifier: PASS — simple buffer geometry verified
# artifact: download (6171 bytes)
import geopandas as gpd

gdf = gpd.read_file("parcels.geojson")
crs = gdf.crs

out_gdf = gdf.copy()
out_gdf.geometry = gdf.geometry.buffer(25)
out_gdf = out_gdf.set_crs(crs, allow_override=True)

out_gdf.to_file("simple_buffers.geojson", driver="GeoJSON")
architecture=full-multi-agent
stage=planner
plan={"steps":["Read parcels.geojson into a GeoDataFrame using geopandas.read_file","Store the input CRS (EPSG:3857)","Apply a 25 metre buffer to each geometry with gdf.buffer(25)","Build a new GeoDataFrame from the buffered geometries while retaining original attributes","Assign the stored CRS to the output GeoDataFrame","Write the result to simple_buffers.geojson with driver='GeoJSON'"],"libraries":["geopandas","shapely"],"validation":["simple_buffers.geojson exists on disk","Output feature count equals input parcels.geojson feature count","Output CRS is EPSG:3857","All output geometries are valid and non-empty Polygon or MultiPolygon instances","No rows were dropped and no geometries were fabricated"]}
stage=builder
stage=auditor
auditor_output_present=false
--- execution stdout ---