v0.4.0

What's New in 0.4.0

🎯 Added

• ZPL Diff Auto-Fix Skill — New src/skill/ module with data models, diff classification, diff scanning, and element-level contribution analysis for automated ZPL rendering improvement
• UCC/GS1 Mode for ^BC — Code 128 barcode mode D now correctly prepends FNC1, strips parentheses and spaces, and converts >8 escape sequences to embedded FNC1 separators per ZPL spec
• QR Code UCC Mode — Implemented UCC mode data preparation and improved error correction level handling for ^BQ
• USPS Priority Mail ZPL labels — Added USPS test labels (Priority Mail and Test Merchant) to the golden test suite

🔧 Fixed

• Rotated Text Positioning — Corrected get_text_top_left_pos for 90° and 270° rotations in the renderer
• ^BC GS1 Barcode Encoding — Fixed GS1-128 (mode D) to handle embedded AI separators (>8) and strip grouping characters from the encoding string
• QR Code Quiet Zone — Fixed quiet zone handling for QR codes to match Labelary reference output
• CI: Clippy warnings — Resolved empty-line-after-doc-comments, dead-code, ptr-arg, and needless-range-loop warnings in src/skill/

📝 Changed

• Code Refactor — Improved readability and maintainability across renderer and parser modules
• Diff Thresholds — Updated per-label tolerance thresholds for DHL Parcel IT, BRT IT, and USPS labels

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Release Date: April 21, 2026

For detailed information, see the CHANGELOG.

What's Changed

• fix: resolve CI failures and bump version to v0.4.0 by @Copilot in #9
• Add unit test asserting all golden PNGs are 813×1626 px by @Copilot in #10

New Contributors

• @Copilot made their first contribution in #9

Full Changelog: v0.3.0...v0.4.0