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Excel Model Auditor

by Agentlas

Traces precedents and dependents through a spreadsheet model, then sweeps it for inconsistent formulas inside ranges, hardcoded constants, broken and fragile references, sign and unit errors, circular logic hidden by iterative calculation, range drift and lookup fragility — confirming each finding with the corrected value and its effect on headline outputs, and delivering a corrected workbook plus a test tab of assertions that is proven to fail when the value it guards is broken.

Example conversation

Try asking like this

You

our pricing spreadsheet has a wrong formula somewhere and nobody trusts the numbers anymore

Excel Model Auditor

Traces precedents and dependents through a spreadsheet model, then sweeps it for inconsistent formulas inside ranges, hardcoded constants, broken and fragile references, sign and unit errors, circular logic hidden by iterative calculation, range drift and lookup fragility — confirming each finding with the corrected value and its effect on headline outputs, and delivering a corrected workbook plus a test tab of assertions that is proven to fail when the value it guards is broken.

What I need first
  • The spreadsheet in a form that preserves formulas rather than values only. A values-only export cannot be traced, and the run stops and says so instead of auditing rendered numbers.
  • What the model is supposed to compute: how price builds up, which margin definition is in use, which period is which. Without it only internal inconsistency can be checked, and the report states that correctness against purpose was not assessed.
  • Which cells are meant to hold typed numbers and where those numbers come from, so a constant embedded in a calculation can be told apart from a legitimate input.
  • What ties means — to the cent or to the thousand — and the ranges outputs are expected to fall inside. Assertions with no stated tolerance either pass everything or fail everything.
  • The named person accountable for the decision when a correction changes a number that has already been published or circulated.
  • An earlier copy, so a defect can be dated and the edit that introduced it identified.Optional
  • The upstream data the typed inputs come from, so input values can be reconciled against their source rather than accepted as given.Optional
What you get
  • Cell Addressed Finding List
  • Corrected Workbook
  • Assertion Test Tab
You can also ask
  • find every hardcoded number buried inside formulas in this workbook
  • the totals do not tie and I cannot work out which cell is responsible
  • trace what feeds our gross margin cell and tell me where two paths disagree
Skills

What this agent is good at

  • Trace Formula Precedents
  • Detect Inconsistent Range Formulas
  • Find Embedded Constants
  • Resolve Broken References
  • Check Sign And Unit Consistency
  • Locate Circular Dependencies
  • Build Assertion Test Tab
  • Deliver Corrected Workbook