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Docs: date the long-chains revision entry 2026-10-19
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
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Claude Sonnet 5.5
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# Function parity: worksheet functions and formulas
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> **Last reviewed:** 2026-10-15 · **Last updated:** 2026-10-15 · **Change:** minor (flat operator chains as long as Excel allows: 4,096 operands no longer overflow the stack, Spanish entry accepts them, files keep them as plain formulas); previously minor (MEDIAN and AGGREGATE median avoid intermediate overflow) · **Target:** Microsoft Excel (Microsoft 365), Excel for Mac 16.113.4
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> **Last reviewed:** 2026-10-15 · **Last updated:** 2026-10-19 · **Change:** minor (flat operator chains as long as Excel allows: 4,096 operands no longer overflow the stack, Spanish entry accepts them, files keep them as plain formulas); previously minor (MEDIAN and AGGREGATE median avoid intermediate overflow) · **Target:** Microsoft Excel (Microsoft 365), Excel for Mac 16.113.4
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Excel's worksheet functions, category by category, against GridCraft's function library. Part of
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[target-app-parity.md](target-app-parity.md); gaps feed [gaps.md](gaps.md).
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@@ -115,7 +115,7 @@ workbooks; results checked in as data, not Excel files) and fixing what it finds
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| Date | Change | Summary |
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|---|---|---|
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| 2026-10-14 | minor | Long flat operator chains (#916): 4,096 operands (Excel's 8,192-character limit) no longer overflow the stack when entered, filled, adjusted or saved; chains past 64 operands are no longer saved as dynamic-array formulas; Spanish entry no longer refuses chains past 256 operands |
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| 2026-10-19 | minor | Long flat operator chains (#916): 4,096 operands (Excel's 8,192-character limit) no longer overflow the stack when entered, filled, adjusted or saved; chains past 64 operands are no longer saved as dynamic-array formulas; Spanish entry no longer refuses chains past 256 operands |
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| 2026-10-15 | minor | MEDIAN and AGGREGATE median use an overflow-safe midpoint (#1579); regressions cover finite extremes, tiny values and dependent recalculation |
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| 2026-10-13 | minor | Clear reports changed stored cells sparsely, including those beyond the first million coordinates; dependent formulas and removed spills update, while clearing empty merges still unblocks spills (#1032) |
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| 2026-10-12 | minor | USDOLLAR added as a Compatibility function (not on Microsoft's list, so the counts don't change); MIRR with no positive flow is -1, COUNTIF's bare `"<="` / `">="` skip empty strings, INDIRECT with `a1` = FALSE gives `#REF!` for A1-style text (#738) |
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