supa-brain

Persistent semantic memory MCP server for Claude Code — powered by Supabase + pgvector + Ollama.

Replaces keyword search with real semantic similarity so you can query with natural language across sessions.

Install as Claude Code plugin

claude plugin marketplace add rnblanco/supa-brain && claude plugin install supa-brain

Full setup guide (Ollama, Supabase, credentials): plugin/claude-code/README.md

MCP Tools

Tool	Description
mem_save	Save an observation with semantic embedding
mem_search	Search by natural language query
mem_session_summary	Summarize and persist a session
mem_get_observation	Retrieve observation by ID
mem_update	Patch an existing observation by ID
mem_delete	Delete observation by project + topic_key
mem_context	Get recent sessions and observations (no embedding cost)
mem_suggest_topic_key	Generate a stable slug for upserts
mem_capture_passive	Extract learnings from Key Learnings sections

Configuration

Create ~/.supa-brain/config.env:

# Supabase Dashboard → Settings → Database → Connection string (URI mode)
DB_URL=postgresql://postgres.YOUR_REF:YOUR_PASSWORD@aws-0-REGION.pooler.supabase.com:6543/postgres

# Optional — only needed for the db:migrate command
SUPABASE_URL=https://YOUR_REF.supabase.co

Requirements

• Ollama running locally with nomic-embed-text model
• Supabase project with pgvector extension enabled
• Claude Code >= 1.5.0