project
Agent development platform, formerly MemGPT, that places structured agent-editable memory blocks directly into an agent's context.
No evidence-backed relationships are recorded.
Mem0, Zep, Cognee, Letta, Supermemory and Mnemoverse all ship a knowledge graph, and each one's docs mean something different by a node. Read-time behaviour is the part a buyer can settle from the documentation.
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The opencode-agent-memory plugin gives an OpenCode agent scoped Markdown blocks it rewrites through three tools, plus an opt-in journal it can search locally but never revise. The maintainer documents the failure modes himself.
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A developer who builds one of the six persistent memory systems he checked walks through how each can stop sharing while Cursor and Claude Code both report a healthy connection. The split happens at the account, and nothing logs it.
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The three track leaders have no manifest anyone can download. The curl Bench'd publishes for independent verification points at a host that does not resolve. The badge behind the board bills from $299 a month.
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Jordy Zomer built a Datalog engine so an agent maintains what it currently knows instead of searching its own transcript, and his own benchmark runs put the weak link in the model that writes the facts.
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A comparison of Mem0, Zep and LangChain's memory classes puts the split at adjudication rather than storage. Mem0 pays two model calls per message to get it.
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Hermes Agent treats the runtime as the durable asset and the model as a swappable input. The lock-in moves into your own repo, and the administrator's job moves with it.
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A vendor audited 359,388 edges in its own memory store and found feedback-shaped graphs only where its benchmark harness supplied the feedback. Live tenants got one reinforcement per edge.
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A read-only sensor for cross-tenant memory leaks ships with no tagged release, because its own backend cannot enumerate what the retriever exposed. That limitation is the story.
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Mads Thines has shipped an open-source memory layer for coding agents that starts on local disk. The design bet is that a record of past mistakes should be inspectable and portable.
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