Cut AI Costs 60% and Build Better Memory—Free, in One Afternoon
Problem: Burning $20/day on AI API costs. Reading 5,000-line memory files every session. Slow, expensive, doesn’t scale. Solution: Built a local memory system and intelligent routing layer. Open-source tools. Zero ongoing costs. Result: 60% cost reduction ($4,200/year saved), <50ms memory retrieval, and it gets smarter over time. Here’s what we built in one afternoon. The Two Problems 1. Memory Was Slow and Dumb Reading MEMORY.md (5,000+ lines) every session just to remember yesterday. Hundreds of thousands of tokens wasted on file reads. No indexing. No entity tracking. Grep and hope. ...