OpenClaw Burned $5,600 of API Credits in One Month. Here's the Spec Habit That Prevents It.

The formula was exact. The assumption was wrong. I was building vectorize-mcp-worker — a semantic search system on Cloudflare Workers that costs $5/month where alternatives run $130-190. The architecture was clean. Workers AI for embeddings, Vectorize for the index, one Worker handling everything at the edge. I'd spec'd the core search flow, written the populate endpoint, deployed it. Everything worked. Then I tried to add hybrid search. I gave the agent a clear instruction: extend the search en