Show HN: Mengram – AI agent memory with facts, events, and evolving workflows

2 points

3 months ago

Hi HN, I built Mengram because every AI memory tool I tried only stored facts. My agents kept making the same mistakes — forgetting what happened, losing workflows.

  Mengram stores 3 types: semantic (facts), episodic (events/decisions), and procedural (workflows). The key difference: procedures evolve when they fail.                                                                                                                                
                                                                                                                                                                                                                                                                                          
  Week 1: deploy → build → push (fails: forgot migrations)                                                                                                                                                                                                                                
  Week 2: deploy v2 → build → migrate → push (fails: OOM)                                                                                                                                                                                                                                 
  Week 3: deploy v3 → build → migrate → check memory → push                                                                                                                                                                                                                             
                                                                                                                                                                                                                                                                                          
  This happens automatically from conversations — report a failure, the procedure evolves.                                                                                                                                                                                                
                                                                                                                                                                                                                                                                                          
  Stack: Python, PostgreSQL + pgvector, FastAPI. Free cloud API, self-hostable, SDKs for Python/JS, integrations with LangChain, CrewAI, MCP.                                                                                                                                             
                                                                                                                                                                                                                                                                                        
  Honest limitations: extraction quality depends on LLM, procedural evolution needs clear failure descriptions, no real-time streaming yet.

  Would love feedback on the memory model — is 3 types the right abstraction, or too complex?

1 comment

Mengram stores 3 types: semantic (facts), episodic (events/decisions), and procedural (workflows). The key difference: procedures evolve when they fail. Week 1: deploy → build → push (fails: forgot migrations) Week 2: deploy v2 → build → migrate → push (fails: OOM) Week 3: deploy v3 → build → migrate → check memory → push This happens automatically from conversations — report a failure, the procedure evolves. Stack: Python, PostgreSQL + pgvector, FastAPI. Free cloud API, self-hostable, SDKs for Python/JS, integrations with LangChain, CrewAI, MCP. Honest limitations: extraction quality depends on LLM, procedural evolution needs clear failure descriptions, no real-time streaming yet. Would love feedback on the memory model — is 3 types the right abstraction, or too complex?