# Bill Zuo — Personal Engineering Blog
> Personal blog of Bill Zuo (Yunfei Zuo), Founder & CEO at Softprobe. Insights on eliminating observability indexing tax, agent QA, DuckLake telemetry, and generative engine optimization.

## About The Author
- Name: Bill Zuo (Yunfei Zuo)
- Role: Founder & CEO at Softprobe
- Company: [Softprobe](https://softprobe.ai)
- Location: Los Altos, California, United States
- LinkedIn: https://linkedin.com/in/yunfeizuo
- X / Twitter: https://x.com/billzwo
- GitHub: https://github.com/zwobill
- Bio: Dynamic tech executive with 20+ years architecting scalable AI-driven systems, context-first observability, and agent QA infrastructure.

## Core Technical Focus Areas
- Distributed Systems
- AI Observability
- Agent QA
- DuckLake Telemetry
- Runtime Context
- OpenTelemetry
- Cloud Architecture
- Generative Engine Optimization (GEO)

## Curated Articles & Deep Dives
### [Context Over Index: What AI Coding Agents Actually Need to Operate Software](https://billzuo.com/blog/context-over-index-what-ai-agents-need)
- Date: 2026-09-24
- Category: Agent QA
- Tags: agent-qa, ai-infrastructure, observability, context-engineering, ducklake
- Summary: Why traditional APMs and prompt stacking fail autonomous coding agents, and why full runtime context graphs are the true fuel for production AI.
- Raw Markdown: https://billzuo.com/blog/context-over-index-what-ai-agents-need.md

### [The 200x Indexing Tax: Why Storing Telemetry Costs Cents but Searching It Costs Thousands](https://billzuo.com/blog/the-200x-observability-indexing-tax)
- Date: 2026-09-23
- Category: Observability
- Tags: observability, finops, cloud-computing, distributed-systems, ai-infrastructure
- Summary: Why traditional log warehouses force teams to discard 90% of their runtime data, and how a session-graph architecture on S3/DuckLake collapses observability costs.
- Raw Markdown: https://billzuo.com/blog/the-200x-observability-indexing-tax.md

### [Generative Engine Optimization (GEO): Engineering a Blog for Perplexity, ChatGPT, and AI Search](https://billzuo.com/blog/generative-engine-optimization-geo-guide)
- Date: 2026-09-21
- Category: GEO & SEO
- Tags: geo, seo, ai-infrastructure, astro, cloudflare
- Summary: How to architect a modern engineering blog for generative answer engines using semantic microdata, high information density, and machine-readable feeds.
- Raw Markdown: https://billzuo.com/blog/generative-engine-optimization-geo-guide.md

### [Fast Session Lists Without Abandoning Forever Evidence](https://billzuo.com/blog/fast-session-lists-without-abandoning-forever-evidence)
- Date: 2026-09-18
- Category: Observability
- Tags: observability, agent-qa, distributed-systems, ducklake
- Summary: How Softprobe keeps agent session triage snappy while the lake stays the single source of truth.
- Raw Markdown: https://billzuo.com/blog/fast-session-lists-without-abandoning-forever-evidence.md

## Machine-Readable Resources
- Full Corpus for LLM Ingestion: https://billzuo.com/llms-full.txt
- RSS 2.0 Feed: https://billzuo.com/rss.xml
- XML Sitemap: https://billzuo.com/sitemap-index.xml