{"id":"repo-solutions-stdlib-only","text":"Solutions import only from the Python standard library (`unittest`, `typing`, `collections`, `annotations`) — no external packages are used anywhere in the repo","truth_value":"IN","source":"entries/2026/06/06/number-of-valid-words-in-a-sentence-solution.md, entries/2026/06/06/occurrences-after-bigram-solution.md, entries/2026/06/06/odd-string-difference-solution.md, entries/2026/06/06/palindrome-linked-list-solution.md, entries/2026/06/06/palindrome-number-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"repo-solutions-stdlib-only","truth_value":"IN","reason":"premise"}]}}