`clide image show --file meta.json` reads a {path,label,description,caption}
payload so an image can carry a title and a longer description, not just a
one-line caption. ImageMessage + the image card render the richer metadata;
the bare `image show <path> [--caption]` form is unchanged. Honest userError
on a malformed/missing payload. Text annotation only (option a) — visual
marker overlays stay a follow-up.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
jpmschweitzerandClaude Opus 4.8
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