🪲 BUG-#12: Preserve real image MIME type instead of hardcoding image/png - #13
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FernandoCelmer
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Aug 15, 2026
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Code Review
Code issues found: 1
| # | Severity | Comment |
|---|---|---|
| 1 | [Suggestion] | Regex: re.DOTALL + ambiguous +- range in MIME character class |
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Description
Fixes hardcoded
image/pngMIME type into_openai_messagesandto_anthropic_messages. Introduces_split_image()to extract the real MIME type fromdata:<mime>;base64,<data>URLs, while falling back toimage/pngfor bare base64 strings (backward-compatible).Closes #12
Related: dotflow-io/vscodeloop#3
Motivation and Context
Images of any type (JPEG, WebP, GIF, etc.) were being sent to providers as
image/png, causing provider-side validation errors or silent misinterpretation. The extension currently strips thedata:prefix before sending, so both sides need the fix end-to-end.Types of changes
Checklist