{"id":"one-problem-per-directory","text":"Each problem gets its own directory containing at minimum a `solution.py` and `test_solution.py`, with optional `plan.md` and `review.md` files.","truth_value":"IN","source":"entries/2026/06/06/count-days-spent-together-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"one-problem-per-directory","truth_value":"IN","reason":"premise"}]}}