Rafael Teixeira (rst_86)

Kiroween 2026

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Build something wicked and git commit to the darkness.

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Join a global week of building with Codex

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Build something wicked for Kiroween, our annual Halloween-themed hackathon where developers dare to code in dark mode

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A challenge for developers to explore Kiro, an AI IDE that works alongside you to turn ideas into production code with spec-driven development.

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Build with gpt-oss, OpenAI’s open weight reasoning models.

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Build with AI for a shot at some of the $1M+ in prizes.