How Mem0 Cut Claude Code's Memory Footprint By 97%

An experiment using Claude Code with and without the Mem0 plugin examined whether persistent memory reduces context-token usage and preserves preferences across cleared sessions. In a project containing 26 prior memories, Mem0 retrieved a 445-token relevant memory slice instead of loading 13,700 tokens from memory files, leaving more context available while producing comparable code output and adding migration-helper test coverage in a TypeScript Qdrant test suite. A separate recall test found that, after the `/clear` command removed conversation context, Mem0 retained and applied a previously stated coding preference for standard for-loops, whereas the session without memory defaulted to a list comprehension. The results attribute these effects to Mem0’s retrieval of query-relevant stored information through an MCP connection rather than wholesale loading of session state, while noting that the tests do not establish whether it should replace project instruction files or predict performance with much larger memory stores.

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