{"id":"repo-solution-test-convention","text":"Each problem directory contains `solution.py` with the solution class/function and `test_solution.py` with tests; some solution files also include inline `unittest` suites runnable via `__main__`.","truth_value":"IN","source":"entries/2026/06/06/reformat-date-solution.md, entries/2026/06/06/reformat-the-string-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":["test-colocation-dual-mode-inconsistent"],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"repo-solution-test-convention","truth_value":"IN","reason":"premise"}]}}