Note-taking apps store what you put in. 3ngram gives AI clients typed memories they can search and an explicit briefing that can bring open work into the next session.
Obsidian, Notion, Apple Notes: full of ideas, meeting notes, and half-finished plans. You add things but rarely go back. Nothing connects, nothing follows up, nothing tells you what you forgot.
3ngram: Memories have types and lifecycle. Commitments can be open, waiting, resolved, or expired. When you invoke a briefing, open commitments, blockers, and stale candidates return in one bounded response.
You took great notes in Obsidian. But your Claude session doesn't know about them. Your ChatGPT thread doesn't either. The second brain and the AI brain are completely disconnected.
3ngram: 3ngram is a shared work state that MCP clients can read and write. Use the briefing and debrief prompts when you want to orient or close a session; neither runs passively.
Zettelkasten, PARA, daily notes, weekly reviews. The system works if you maintain it. Most people maintain it for 3 weeks, then it becomes another abandoned project.
3ngram: Memories are typed and searchable by meaning. Capture remains explicit, and advisory consolidation proposals never merge or delete your records on their own.
Illustrative AI-client presentation assembled from explicitly saved memories. 3ngram returns structured, bounded records; it does not ingest external systems or generate this narrative in the background.
It can replace some AI-work memory habits, but v1 does not index an Obsidian vault. Keep Obsidian for notes and linking if that workflow matters to you.
You choose a type and scope when capturing a memory. Search works by meaning and text, so you do not need a folder tree, but capture and lifecycle decisions remain explicit.
Search and briefings remain bounded. Consolidation is advisory: proposed relationships require review, and normal write paths never merge or delete memory rows.
Capture the records worth keeping, track commitments, and invoke a bounded briefing when the next session needs the thread.