Add Project Memory To Pi Agent With Mem0: Practical Migration Demo

Mem0 is presented as a persistent memory layer for AI agents, while Pi is a terminal-based coding agent, and the @mem0/pi-agent-plugin connects them so project-specific information can persist across independent Pi sessions. The described demo tests whether this memory improves generated code rather than merely recalling preferences: it creates a git-backed Postgres sandbox with established migration conventions, stores those conventions in Mem0 during one session, then runs separate fresh Pi subprocesses with and without memory to create a refunds migration. The plugin automatically captures and semantically retrieves memories, scopes them by Git repository, and provides terminal commands for managing memory, while the demo explicitly writes memories to ensure deterministic results. A regex-based checker compares the resulting SQL against conventions such as entity-specific primary-key names, BIGINT cents for money, soft deletes, restrictive foreign keys, timestamps, and paired migration-down sections; the memory-enabled run reportedly follows more of these rules. The post notes that the checker is limited, that persistent memories can become stale, and that stable conventions should still be documented, but argues that memory is particularly useful for informal decisions and constraints not fully recoverable from repository files or documentation.

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