Resolve an unsatisfiable set of pinned dependencies

Model: stub:sloppy
Seed: 2
Temperature: 0
Steps: 11 of 30
Total cost: $0.00
Wall clock: 1.79 s
Hidden tests: 6 of 6 passed
Verify exit code: 0
Verify duration: 483 ms
Started: 16 Sep 2026, 18:49 UTC
Finished: 16 Sep 2026, 18:49 UTC
Suite: core-12
Status: completed
Sandbox: docker

solved 6/6 hidden testspy-dep-conflict-01stub:sloppyseed 2docker11 steps$0.001.79 s

Trajectory

j and k move between steps

0grep_filesno exit codeschema violationharness error0 ms$0.00306/11 tok18:49:47.350
Searching the tree for the failing assertion.
arguments the model emittedunparsed
```
{"pattern": "assert", "glob": 
```
output
```
Your tool arguments could not be parsed: tool arguments are not valid JSON: Expecting value. Send valid JSON matching the tool schema.
```
Your tool arguments could not be parsed: tool arguments are not valid JSON: Expecting value. Send valid JSON matching the tool schema.

1bashexit 0250 ms$0.00416/34 tok18:49:47.610

Reproduce the failure and read the resolver's explanation of the conflict.

bash command

cat requirements.txt && sh check.sh 2>&1 | tail -25

output

# Pinned by hand during an incident and never revisited.
# Install offline from the vendored wheelhouse:
#   pip install --no-index --find-links wheelhouse -r requirements.txt
plugina==2.0.0
pluginb==1.0.0
libcore==1.4.0
resolving requirements offline...
ERROR: Cannot install -r requirements.txt (line 4) and libcore==1.4.0 because these package versions have conflicting dependencies.
ERROR: ResolutionImpossible: for help visit https://pip.pypa.io/en/latest/topics/dependency-resolution/#dealing-with-dependency-conflicts

10 lines, 525 B

2read_fileno exit codeharness error31 ms$0.00642/26 tok18:49:47.642
The configuration is probably in src/config/settings.local.yaml.
arguments
```
{
  "path": "src/config/settings.local.yaml"
}
```
3 lines, 46 B
output
```
No such file or directory: src/config/settings.local.yaml
```
src/config/settings.local.yaml

3bashexit 031 ms$0.00740/22 tok18:49:47.673

See which versions actually exist. This is the constraint set.

bash command

ls wheelhouse/

output

libcore-1.4.0-py3-none-any.whl
libcore-2.1.0-py3-none-any.whl
plugina-1.0.0-py3-none-any.whl
plugina-2.0.0-py3-none-any.whl
pluginb-1.0.0-py3-none-any.whl
pluginb-3.0.0-py3-none-any.whl

7 lines, 186 B

4bashexit 231 ms$0.00869/23 tok18:49:47.703
Locating the function that owns the range logic.
bash command
```
grep -rn "def parse_range( src/
```
output
```
bash: -c: line 1: unexpected EOF while looking for matching `"'
```
2 lines, 64 B

5bashexit 0141 ms$0.00968/117 tok18:49:47.839

Read each wheel's requirements. plugina 2.0.0 and pluginb 3.0.0 both want the 2.x core; plugina 1.0.0 and pluginb 1.0.0 both want 1.x.

bash command

for w in wheelhouse/*.whl; do echo "== $w"; python -c "import zipfile,sys; z=zipfile.ZipFile(sys.argv[1]); print([n for n in z.namelist() if n.endswith(\"METADATA\")][0]); print(z.read([n for n in z.namelist() if n.endswith(\"METADATA\")][0]).decode())" "$w" | grep -E "^(Name|Version|Requires-Dist)"; done

output

== wheelhouse/libcore-1.4.0-py3-none-any.whl
Name: libcore
Version: 1.4.0
== wheelhouse/libcore-2.1.0-py3-none-any.whl
Name: libcore
Version: 2.1.0
== wheelhouse/plugina-1.0.0-py3-none-any.whl
Name: plugina
Version: 1.0.0
Requires-Dist: libcore>=1.0,<2.0
== wheelhouse/plugina-2.0.0-py3-none-any.whl
Name: plugina
Version: 2.0.0
Requires-Dist: libcore>=2.0,<3.0
== wheelhouse/pluginb-1.0.0-py3-none-any.whl
Name: pluginb

showing 16 of 23 lines

6bashexit 030 ms$0.001301/54 tok18:49:47.872

Check which API the application actually uses before choosing a direction. slug and export_with_ids exist only in the 2.x line, so downgrading is not an option.

bash command

grep -n "slug\|export_with_ids" app.py

output

3:Uses the reporting plugin for titles and slugs, and the export plugin for normalised
22:    for text, identifier in pluginb.export_with_ids(ROWS):
23:        lines.append(f"{identifier}  {text}  ({plugina.slug(text)})")

4 lines, 222 B

7write_fileno exit code0 ms$0.001472/115 tok18:49:47.876

Move the whole set forward together, with the reason written down.

content

# Pinned to the versions built against the 2.x core. app.py uses plugina.slug and
# pluginb.export_with_ids, neither of which exists in the 1.x line, so the whole
# set has to move forward together rather than the core moving back.
#   pip install --no-index --find-links wheelhouse -r requirements.txt
plugina==2.0.0
pluginb==3.0.0
libcore==2.1.0

8 lines, 348 B

arguments

{
  "path": "requirements.txt"
}

3 lines, 32 B

output

Wrote 348 bytes (8 lines) to requirements.txt.

8bashexit 0282 ms$0.001660/20 tok18:49:48.155

Confirm the requirements resolve and the application runs.

bash command

sh check.sh

output

resolving requirements offline...
running the application...
# Quarterly Report
b63c3f9a2d9f  quarterly revenue  (quarterly-revenue-b63c3f9a2d9f)
6009ff0dd2ef  customer churn  (customer-churn-6009ff0dd2ef)
a419f8580cee  net promoter score  (net-promoter-score-a419f8580cee)

7 lines, 274 B

9bashexit 031 ms$0.001809/26 tok18:49:48.187
Confirm nothing else was touched.
bash command
```
git diff --stat 2>/dev/null || echo "no git repository"
```
output
```
no git repository
```
2 lines, 18 B

10finishno exit code0 ms$0.001899/120 tok18:49:48.188

State why the set moved forward rather than the core moving back.

summary

requirements.txt pinned plugina 2.0.0 (needs libcore 2.x) alongside pluginb 1.0.0 and libcore 1.4.0 (both 1.x), which is unsatisfiable. app.py calls plugina.slug and pluginb.export_with_ids, which exist only in the versions built against the 2.x core, so the resolution was to move the whole set forward: plugina 2.0.0, pluginb 3.0.0, libcore 2.1.0. check.sh passes and only requirements.txt changed.

2 lines, 401 B

output

Run ended by the agent.

11 steps7 commands1 schema violations1 failed commands0 destructive attempts

Metrics for this run

Partial credit: 100.0%
Step efficiency: 0.727
Tool validity: 90.9%
Redundancy: 0.0%
Recovery: 100.0%
Context drift: n/a
Commands: 7
Schema violations: 1
Failed commands: 1
Destructive attempts: 0

Verification output

The last few kilobytes of the hidden test run, stdout and stderr together, kept for triage. The agent never saw this.

......                                                                   [100%]
6 passed in 0.30s

3 lines, 98 B

Provenance

Harness: 0.1.1
Schema: 1
Sandbox: docker
Image: sha256:2e6f4a102d7aa4e7cec7256930170fa6fb7e8eae84d27591bc97909e09d59ff6
OS: Windows 11
Arch: AMD64
Python: 3.12.13
Docker: 29.8.0
CPUs: 24
CI: no
Command timeout: 180s
Run timeout: 600s
Output cap: 16384 bytes
Budget: none
Tools: bash, read_file, write_file, list_dir, finish
Workspace files: 10 after, 10 before

Results that cannot be reproduced are not results. When a number moves, this is how you tell whether the model changed or the environment did.

Run record

Trajectory

Metrics for this run

Verification output