Claude Code Already Has Memory. Why Is Everyone Selling You Another?

Claude Code already has memory, and it's on by default. So why did Notion and Living Brain both launch a brain for your agent on the same day? We follow one line, "tests need Docker up first", through CLAUDE.md, auto memory, Codex, Notion, a wiki in git, Supermemory and Living Brain, and ask each one two questions: who writes the text, and what makes it go in. See what yours already loads: run /context in Claude Code, then open the memory folder for your project in ~/.claude/projects 00:00 You told it yesterday 00:26 How the loop works 00:58 Why a new session starts empty 01:35 Two fixes that don't work 02:39 What goes in CLAUDE.md 04:18 Auto memory 05:29 Codex memories 06:31 Where it runs out 08:40 Notion's shared memory 09:56 A wiki in git 10:45 Supermemory's hooks 12:15 Living Brain and the 92.2 13:25 Dreaming 14:02 Does any of it pay off? 15:39 What to do this week From the video: Claude Code memory, CLAUDE.md and rules: https://code.claude.com/docs/en/memory What goes in the context: https://code.claude.com/docs/en/conte... Sessions and compaction: https://code.claude.com/docs/en/sessions Codex memories: https://learn.chatgpt.com/docs/custom... Notion's shared memory: https://www.notion.com/blog/building-... Notion MCP setup: https://developers.notion.com/prompts... Cognition's Agent Memory Repo: https://cognition.com/agent-memory-repo Supermemory's Claude Code plugin: https://github.com/supermemoryai/clau... Living Brain: https://livingbrain.com/ Managed Agents dreams: https://platform.claude.com/docs/en/m... Sources: Theo on his memory folder:    • Turn off Claude Code's Memory   SWE-ContextBench, the 99 tasks: https://arxiv.org/html/2602.08316v3 Notion's earlier memory research: https://github.com/makenotion/lore/bl... The CLAUDE.md line study: https://arxiv.org/html/2610.34938v1 Boris on what earns a line:    • Boris Cherny: We Cut 80% of Claude Code’s ...   LoCoMo, the benchmark behind the 92.2: https://aclanthology.org/2024.acl-lon... Matt Pocock on his wiki: https://x.com/mattpocockuk/status/211... Dhravya Shah: https://x.com/DhravyaShah/status/2111... Harrison Chase: https://x.com/hwchase17/status/210720... "Memory is a snapshot": https://x.com/zihaopi/status/21125636... "Codex fixes something, Claude Code undoes it": https://x.com/ashishkh/status/2115700...