Which agents remember anything between sessions?

Present but not verified. 5 more harnesses register a long-term memory tool that has not been read from source: Grok Build memory_get, Grok Build memory_search, Hermes memory, MiMo Code memory, Qwen Code save_memory. They are left out of the table below rather than shown as empty rows — a blank cell would claim the behaviour is absent, which is a different thing from not having checked.