Hackathon-winning memory system rebuilt as zero-dependency MCP server with SQLite knowledge graph
BoringCelebration405 · reddit · 2026-09-09
The author rebuilt their LangGraph-hackathon-winning memory system from scratch as Synapse, a zero-runtime-dependency MCP server. Ingest takes a ChatGPT export or text directory, writes it to Markdown, and creates a disposable SQLite FTS5 index — searchable immediately with zero API calls (3,138 conversations scanned, 2,044 imported, 9.3 seconds).
An optional build step converts history into linked wiki pages, forming a knowledge graph on SQLite instead of a graph database. The MCP tool surface exposes read-only endpoints: search, readpage, listpages, neighbors and readsource, so agents search first and open only what they need rather than dumping the full vault into the prompt.
Try the populated demo without an API key: uvx --from synapse-vault synapse serve --demo. The author seeks feedback on whether read-only retrieval suffices or agents should also write memories.
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