v0.6.0

Added

• Metadata writing surface: JPEG (ICC, JFIF, Ducky, comment, XMP, IPTC
  append), PNG (tEXt/iTXt/zTXt, language-qualified text, ICC profile,
  ancillary chunks, modification date, XMP delete), WebP (ICC profile,
  XMP delete, EXIF preservation), GIF, EXV, PBM/PGM/PPM, and standalone
  EXIF, ICC, and XMP writing.
• CLI write workflows: tag copying (tagsFromFile with source-file
  selectors, exclusions, same-file mappings), conditional write
  filtering (boolean/regex/parenthesized conditions), output-path
  templates with source-token expansion, collision counters, batch
  writes to directories, stdout output, and -o XMP sidecars.
• ExifTool-compatible write modes (wm, wc, wg, and group-creating
  variants) with CLI validation.
• XMP list append/removal: Creator and Subject appends, IPTC Keywords,
  Dublin Core list properties, first-match list-item removal, and empty
  container cleanup after deletion.
• PNG read parity: ICC profile parsing and compressed text chunks.
• Standalone XMP and PBM/PGM/PPM/PPM format writers.

Fixed

• JPEG ICC profile segment reassembly; PNG EXIF/ICC/text round-trip
  preservation, GPS sign encoding, date/value normalization, and
  late-chunk hoisting.
• Permission preservation in atomic metadata writes; quiet-mode write
  failure surfacing; unsupported CLI tag-write reporting.

Docs

• CLI and API write workflow documentation and metadata write parity
  scope.