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teamchong
e433b26caa
Production data (2026-05-20): real 161,101-char system slab being rejected by the row-aware profitability gate as `not_profitable`. multiCol=2 packs 282 rows/image, but 2000+ newline-bounded lines need ~10 images, and at 2500 tok × 10 × 1.10 = 27,500 tok the gate (correctly) refuses since the text baseline is cheaper. Fix: strip per-line trailing whitespace and collapse 3+ consecutive newlines to exactly 2 *before* feeding the renderer. Both transforms are lossless for the model (whitespace at line-end carries no signal; blank- line runs longer than 2 are visual noise). This drops visual-row count without changing meaning, flipping borderline-rejected slabs profitable. Accounting uses raw (pre-compaction) length for `origChars` and `compressedChars`, so the savings credit reflects what Anthropic would have billed — not the post-compaction figure. Applied at four sites: - combined static slab (system + tool docs) - system-reminder block - tool_result string content - tool_result array-of-blocks (joined text) 8 new unit tests for `compactSlabWhitespace`: empty input, trailing whitespace stripping, 3+ newline collapse, paragraph-break preservation, indent preservation, idempotency, realistic markdown shrink. 270 tests pass, typecheck clean, build clean.