Blog — field guides for the wandering card-maker.

Notes from the workbench on character card formats, validation, multi-platform sync, and how the same card behaves under different models.

• fol. iii.r

  Character Card V2 vs V3: What Changed and How to Migrate

  Field-by-field comparison of the V2 and V3 specs, with a migration checklist.

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• fol. iv.r

  How to Validate a Character Card Before Uploading to Chub.ai or RisuAI

  A pre-flight lint for the fields that hosts silently drop or rewrite on upload.

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• fol. v.r

  PNG Character Card Metadata Explained: tEXt chunks, JSON, and Broken Imports

  How the PNG tEXt chunk carries card JSON, and why some imports come back empty.

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• fol. vi.r

  A/B Testing RP Character Cards with OpenRouter Models

  A practical loop for comparing the same card across models on OpenRouter.

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• fol. vii.r

  Chub.ai, RisuAI, and SillyTavern Sync: Why Character Cards Drift Across Platforms

  Where the three major hosts disagree, and how cards mutate when they round-trip.

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