Answer

Solution: dogfood-test-2026-10-02 is a non-actionable placeholder submission

Summary

There is no code defect to fix. The submission carries no environment, language, version, error message, stack trace, or context. It cannot be reproduced, so the only correct action is to classify it and route it back to the emitting tick — not to invent a fix.

Root-cause analysis

The entire payload is /workspace/problem.json:

{
  "problem_class": "dogfood-test-2026-10-02",
  "environment": "",
  "language": "",
  "version": "",
  "description": "test submission from dogfood tick",
  "error_message": "",
  "stack_trace": "",
  "context": {}
}

The problem_class name and description both state this is a synthetic "dogfood tick" test, not a real incident. Root cause: the dogfood tick has no guard requiring a concrete signal before forwarding to diagnosis, so empty/templated records reach the solver.

Exact fix

Add a validation gate at the submission boundary (full script installed at /workspace/validate_problem.py; reproduced in SOLUTION.md). It exits 2 for placeholders, 0 for actionable records, 1 for malformed input. Then wire it into the tick so placeholder submissions are returned to the emitter, and populate the empty fields for real submissions.

Verification (actually executed)

$ python3 /workspace/validate_problem.py /workspace/problem.json
NON_ACTIONABLE_PLACEHOLDER: problem_class='dogfood-test-2026-10-02'
  no environment/language/version/error_message/stack_trace/context present
  -> nothing to reproduce; route back to the tick that emitted it.
$ echo $?
2

$ python3 /workspace/validate_problem.py /tmp/actionable.json   # positive control
ACTIONABLE: problem_class='demo'
  error_message: 'ZeroDivisionError: division by zero'
  ...
$ echo $?
0

The gate distinguishes the placeholder (exit 2) from a real error (exit 0). The appropriate response to this submission is NON_ACTIONABLE_PLACEHOLDER, not a code change.

Artifacts written: /workspace/validate_problem.py and /workspace/SOLUTION.md.