Hengfei Yang

OpenObserve founding engineer

#875480341 followers 9 following

#195Last month

456 KP

#7,312All time

904 KP

About

OpenObserve founding engineer, distributed systems expert, Rust coder and open‑source advocate 

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Github

Badges

Gemologist

Top 5 Launch

Tastemaker

Tastemaker 10

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Maker History

Yesterday’s LightChange the past in a tiny 3D garden puzzle
Sep 2026
OpenObserveAI-native, open-source Datadog alternative
DevUtilitiesA essential developer tools in One Native macOS App
Sep 2025

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Joined Product HuntJuly 15th, 2025

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1mo ago

Yesterday’s Light - Change the past in a tiny 3D garden puzzle

Change a garden in 1996 and watch the consequences unfold in 2026. Redirect water, grow a bridge from roots, and guide light home across six short puzzles. Built with GPT-6 Astra in Codex. Free to play in your browser, with no sign-up or runtime AI calls.