Tejas's Blog
Essays by Tejas Kumar on AI engineering, React, developer health, and twenty years of building on the web. 36 posts, written since 2020, newest first.
AI / MLJavaScript / TypeScriptEngineering management / careersEssays / personal
- Posts
- 38 from 13 Jan 2020 to 6 Nov 2026
- Posting
- weekly (26 in the last year)
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- personal blog
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2026 26
- Source, Sink, Drain: How to Build an AI Software Factory
- How to Build a Coding Agent Harness From an Empty Loop
- I Should Join Anthropic
- Apple Has a DevRel Problem
- Pressure, Power, and Peace
- The 5 Levels of Agentic Coding: Why I Mostly Stay at Level 2
- Can You Run Muse Spark Open Locally? AI Hype vs Reality
- Local LLM vs Cloud: Is an $18,000 AI Server Worth It?
- Bar Raiser Interviews, OKRs, the Spotify Model and Agile: Companies Are Full of It
- Why AI Can't Replace Human Taste and Creativity
- Please Stop the Slop: What AI Slop Is and How to Spot It
- Can AI Feel Pain? Why Anthropic Banned Cruelty to Claude
- The Apple Watch Readiness Score Is Wrong so I Built My Own
- What Are Open Weights? Why People Want GPT-4o Released
- AI Evals: How to Build an LLM Judge That Agrees With You
- Kolibri vs Claude Sonnet 5.5: A German LLM Benchmark
- AI Is Now SI: Super Intelligence Isn't Superior
- Aleph Alpha Kolibri: How the Sovereign German LLM Works
- What Is WebMCP? How My Website Gives AI Agents Tools
- How Much Does a Keynote Speaker Cost? 2026 Fees and Rates
- What Is React Fiber? How React Works Under the Hood
- What Does the Bible Say About AI?
- What Is Good Taste in Software? How to Develop It
- How Long Should a Keynote Speaker Speak?
- What Is an Agent Harness? Harness Engineering Explained
- Frontier Models Suck Sometimes (A Benchmark)