Spreadsheet changes that can pass CI

Short summary

FormulaFence is an MIT-licensed CLI that statically compares .xlsx/.xlsm workbooks to detect formula changes, formula-to-value substitutions, broken references, and macro payload changes without executing formulas. It traces downstream dependencies and enforces YAML-based review policies, outputting SARIF for CI integration. Validated against a real 18-sheet cap-table workbook, it fills the merge-boundary gap that Git binary diffs leave open for spreadsheet-heavy teams.

• •FormulaFence statically diffs Excel workbooks and enforces YAML review policies in CI
• •Detects formula-to-value swaps, broken refs, external links, and downstream impact
• •Validated on a 6,623-cell cap-table model; outputs SARIF for pipeline integration

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