Do due diligence on a memory framework

The note picks Mem0, because it is the framework most often proposed and the one whose design changed most in 2026. It is written against one pinned version, v2.2.1, so every claim can be checked against the same code. The decision that matters most is the order of evidence: source code at the tag first, then official docs and release notes, then vendor and competitor blogs, never marketing pages or search snippets. Several of the facts the recommendation rests on are in the code and nowhere in the docs.