Knowl
MCP memory server for coding agents that marks outdated facts instead of deleting them.
An MCP memory server for coding agents that stores facts with their reasoning, evidence and source, and never deletes a fact when it goes out of date — it marks the old one as superseded and keeps it readable. Runs in your own repository by default, so code, embeddings and session history stay local until you choose to share them. On its own published freshness benchmark, it answered correctly 90 times out of 100, against 79% for the next-best tool and 60% for GPT-4o with long context.
What holds up
- +Superseded facts are never deleted, so you can see what changed, when, and why it changed.
- +Runs locally in your repo by default — code and session history stay off the cloud until shared.
- +Scored 90 of 100 on its public freshness benchmark, ahead of the next tool's 79%.
Mind the limits
- −Benchmark numbers come from Knowl's own published comparison, not an independent test.
- −Full automatic capture needs an MCP client with lifecycle hooks — basic clients get less.
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