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Ben Hoverter
118eacea64
Discord MESSAGE_CREATE payloads with attachments were previously parsed in a way that either dropped the attachment (when text was present, only the text was kept) or dropped the whole message (when text was empty, the early `content.is_empty()` return killed bare-image posts). The result on text-only providers like claude-code: silent drops, then hallucinated acknowledgements of content the model never saw. This rewires the inbound path end-to-end: * types: add ChannelContent::Multipart(Vec<ChannelContent>) so a single inbound message can carry a caption + one or more attachments as sibling blocks. Doc forbids nesting; consumers debug_assert. * discord: classify attachments by MIME (with extension fallback for bot-relayed payloads that omit content_type) and a 5 MB vision-size cap matching Anthropic's image block limit. Vision-eligible images become ChannelContent::Image; everything else becomes File. Emit Multipart whenever text and attachments coexist, or when there are multiple attachments. * bridge: flat-map Multipart in both dispatch paths — into Vec<ContentBlock> for multimodal-capable providers, and into a newline-joined text descriptor for text-flatten providers. * telegram: add the Multipart arm to send_to_user for exhaustive-match parity; flattens defensively. * claude_code driver: render Image blocks as "[attachment: <mime> image, ~N KB — not viewable on this provider]" instead of dropping them. The model still cannot see the image, but it can acknowledge it coherently rather than confabulating. Adds 9 discord parser tests covering all (text, attachment-count) shapes plus MIME edge cases, and 2 claude_code driver tests covering captioned and bare-image rendering.