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
HARNESS_ERRORInfrastructure failure, the agent never ran properly. Not a signal about agent or task.
SubtypeAgent Execution Failure - No Tool Completions
EvidenceAgent trajectory.json is empty ([]). The raw log shows the agent performed subagent exploration to read files but never progressed to tool execution for code edits. Test output shows 'SCRIPT ERROR: Parse Error' at player_body.gd:49 indicating the script was never modified from its stub state. Agent never added the required exports or implemented the camera shake functions.
Root causeThe agent ran exploration steps via a subagent but never transitioned to executing edits on the codebase. With an empty trajectory and no file modifications, the GDScript file remained unchanged, causing a parse error during test execution because the required exports and implementations were never added.
RecommendationN/A - task is fine. The task itself is well-specified (instruction.md is clear, tests are comprehensive and correct). The failure is an agent execution/harness issue, not a task specification problem.
Trajectory
This run recorded no trajectory steps.
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)
SCRIPT ERROR: Parse Error: The variable type is being inferred from a Variant value, so it will be typed as Variant. (Warning treated as error.)
at: GDScript::reload (res://scripts/player_body.gd:49)
ERROR: Failed to load script "res://scripts/player_body.gd" with error "Parse error".
at: load (modules/gdscript/gdscript.cpp:3022)
VALIDATION_FAILED: Export 'camera_shake_noise' missing on PlayerBody
Reproduce this trial: git checkout 2f94510 && PYTHONPATH=src python3 scripts/build_site.py , then open trial/trial_8870ad236ecc469c. Re-running the agent live requires EVAL_PLATFORM_ENABLE_OAUTH_SMOKE=1 and is non-deterministic.