- READMEs (en/ja/zh): the chat is with an LLM / VLM; the optional image judge is
a decision model (not called VLA). Mention the UI row still labeled "VLA".
- Code comments: use "decision model" instead of VLA (no functional change).
- docs/thumb.png: updated artwork ("Decision" instead of "VLA"), resized to
800x400 (Registry icon limit).
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>