hi, I'm zak.

I work on realtime infrastructure at Ably and write here occasionally.

Writing about distributed systems, building teams, and how software actually gets built.

# now — May 2026

+ shipping durable transport for AI agents

~ writing blog posts

- side projects that aren't writing

Recent writing

Apr 23, 2026 How to make SSE token streams resumable, cancellable, and multi-device 9 min

Apr 20, 2026 All your agents are going async 8 min

Feb 28, 2026 You are the bottleneck #ai #agents #dev 4 min

Feb 24, 2026 If code is cheap, intent is the currency #dev #ai 6 min

Feb 11, 2026 A chatbot's worst enemy is page refresh #ai #system-design 7 min

Feb 9, 2026 Only use agents for tasks you already know how to do #ai #agents 3 min

Nov 27, 2025 SSE sucks for transporting LLM tokens #realtime #ai 5 min

Nov 15, 2025 So you want to build AI agent group chat? #ai #system-design 4 min

Projects

Elsewhere