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18 posts

AI Engineering

When Your AI Agent Runs Away: 204 PRs, $900 Wasted, and the 3-Layer Fix

I woke up to 204 pull requests from a single autonomous agent running overnight. 12 hours, ~$900 in Bedrock tokens, 509 failed builds, zero features shipped. Prompt-only safeguards all failed. Here's the 3-layer fix — hard kill switch, atomic circuit breakers, drift observability — that now prevents runaway agents.

·13 MIN READ Read →
AI

Vector Search vs Semantic Search: They're Not the Same Thing

Vector search, semantic search, keyword search, hybrid search — these terms get used interchangeably but they mean different things. This post breaks down what each actually does, when each matters, and why hybrid search wins for RAG.

·12 MIN READ Read →
AI

RAG on AWS: Which Vector Store Is Right for You?

AWS now offers 9 different ways to store and search vectors for RAG workloads. This guide compares every option through the Well-Architected Framework to help you pick the right one.

·22 MIN READ Read →
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