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Simon Willison reverse-engineers Bluesky's Jetstream for custom AI pet

Simon Willison explored Bluesky's Jetstream feature, creating a custom "Codex pet" by reverse-engineering its functionality. This process involved understanding how the application generates animated sprite sheets using GPT-Image-2, showcasing an interactive web application built with JavaScript. AI

IMPACT Demonstrates a user's creative application of AI image generation within a social media platform's features.

RANK_REASON The item describes a user's exploration and reverse-engineering of a specific feature within an existing platform, rather than a new release or significant industry event.

Read on Bluesky Jetstream — AI desk →

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Simon Willison reverse-engineers Bluesky's Jetstream for custom AI pet

COVERAGE [1]

  1. Bluesky Jetstream — AI desk TIER_1 English(EN) · simonwillison.net ·

    Made myself a custom Codex pet today (you'll never guess what it was), and had some fun reverse-engineering how the feature works - it generates animated sprite

    Made myself a custom Codex pet today (you'll never guess what it was), and had some fun reverse-engineering how the feature works - it generates animated sprite sheets using gpt-image-2 simonwillison.net/2026/Jul/14/...