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Grzegorz MartensandClaude Opus 5.5
0d40594cf9
Review found behaviour the tests let break unnoticed (each was a surviving mutant, and each new test fails on it): - black padding bits: a run reaching past the row would stop symbol coding on many scans; - Annex A's 32-bit range and PREV at exactly 256, where a decision would go uncoded: coordinates past 4,435 on a 12,000-pixel-wide and a 10,050-row page, and the contexts of 4436's coding; - marks joined at a corner are one mark; 256 pixels a side is a symbol, 257 is left to the generic region; - the run and row caps, at and past them. The roadmap's status line for this change now comes first, and the "about a third smaller than Group 4 on scans" figure is replaced by what was measured: 27-33% on the same pages with scan-like noise added. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01P6yUtvWGPsJpMLyh6pxSXG