feat(read): AI-forensics read parity - #22
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- PNG IHDR: reference-named Filter/Interlace + sRGB chunk SRGBRendering with PrintConv strings - tEXt/iTXt/zTXt surface bare capitalized keywords; zTXt inflate support; text chunks yield to EXIF/XMP keys - XMP: unknown-namespace locals capitalize like reference; raw History container suppressed (stEvt flattening only); Z-suffix date normalization; GPano int typing; TAG_REMAP entries for UserComment, InvokeAI, DMI, GPano/IGPano - fix(writer): pngWriter omitted IEND CRC - every written PNG was truncated by 4 bytes - ai-parity.test.ts: reference-equal asserts on new A1111 + InvokeAI fixtures (exiftool-gated)
woss
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This was referenced Sep 29, 2026
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Summary
Minimal read-tag parity for Kelp Market (retires
exiftoolFastPerl spawn):Filter,Interlace,SRGBRenderingwith reference PrintConv stringsparameters→Parameters), zTXt deflate support, text chunks yield to EXIF/XMPMetadata/Graph), rawHistorycontainer suppressed (stEvt flattening only),Z-suffix date normalization, GPano integer typing; TAG_REMAP entries forexif:UserComment, InvokeAI, DMI, GPano/IGPanopngWriteromitted the IEND CRC — every PNG written by the library was truncated 4 bytes (reference:Truncated PNG IEND chunk)Test
src/ai-parity.test.ts: reference-equal asserts on two new fixtures (06-ai-a1111.pngtEXt parameters,06-ai-invokeai.pngXMP/DMI/History), exiftool-gated skip patternexiftool -jclean on probe and fixtures