KotoOS evolved a lot during OpenAI Build Week
KotoOS was publicly released as v0.1 on July 13, the first day of Build Week.
At that point, it supported the RP2040.
Two days later, v0.2 added RP2350A support while preserving RP2040 compatibility, together with audio streaming.
During the v0.3 alpha development cycle, I added KotoUI, multilingual application support, and Wi-Fi networking.
In the final stretch of Build Week, I also got Wi-Fi connectivity, SNTP time synchronization, and TLS 1.3 communication working on real RP2040 hardware.
The project still has bugs and stabilization work ahead, so v0.3 is currently an alpha milestone rather than a finished stable release.
But during this one week, KotoOS evolved from an RP2040 application platform into a multi-target, network-connected embedded computing platform.
GPT-5.6 and Codex were used throughout this process for architecture, debugging, implementation, refactoring, testing, performance analysis, and iteration across the firmware, VM, compiler, SDK, UI, simulator, and real hardware.
The physical device remained the source of truth throughout development.
Next: stabilization, better networking APIs, and eventually higher-level network applications such as weather clients and MQTT telemetry.
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