Tools

Diffs two Excel workpapers for accounting logic, not cell noise: formula-to-hardcode, sign flips, stale dates, broken prior-period links. Reads xlsx with the standard library.

Synthetic claim-to-cash scenarios with authoritative expected journal entries and subledger states. Test revenue-cycle accounting without touching patient data.

Executable tests for payer-contract math: rate methods from case rate to stop-loss, every expected amount shown step by step. All synthetic.

Reconciliations and rollforwards as executable JSON specs. Decimal arithmetic, CSV selectors, nonzero exit on a failed check.

Loads CMS hospital cost-report extracts into SQLite without losing worksheet coordinates. Ask for a worksheet, line, and column; get the value and its source row.

Economic-coherence checks for hospital price-transparency files that already pass the CMS validator. Row-level findings, each tied to a named rule.

Snapshots webpages and documents into a local evidence ledger - immutable bytes, hashed passages, diffs between any two captures.

Portable evidence bundles: sources, passages, locators, rights, and hashes in one verifiable zip.

A bill of materials for a dataset: every file hashed, sized, typed, and verifiable later with one command.

Diffs two GeoJSON files by feature ID - added, removed, moved, reshaped - into a summary and a map-ready change layer.

Turns platform takeout files into one private activity timeline in SQLite. Chrome, YouTube, or any CSV. Nothing leaves your machine.

A local release ledger for public statistics: what was the number as known on a given date, and how later revisions changed it.

Tracks the methodology contract of a public statistic - definitions, denominators, seasonal adjustment - and diffs it across releases.

When a claim's wording changes, its citation goes stale. A verification ledger and CI check that catch it.

A concordance for defined terms: where a document's usage drifts from its own glossary. A review queue, not a verdict.

Arguments as plain versionable text - premises, conclusions, objections, replies - with structural diffs between drafts.

Reads an edit decision list and subtitles; charts a film's cutting rhythm, shot lengths, and dialogue density in one HTML report.

Compares two screenplay drafts and reports which scheduled scenes, takes, and subtitles the revision touches.

An offline logbook for the Starting Strength novice progression. Phone-first web app you can install at the gym; your data stays on your device. Unofficial.

A local second screen for a Formula 1 session: gaps, tyre age, pace, stint history, and a transparent pit-rejoin estimate. OpenF1 data.

An educational simulator of one mechanism: the arterial baroreflex answering a pressure disturbance. A teaching model, not medical software.

Lints an N-of-1 experiment protocol for missing design decisions before data collection starts. Prints a preregistration. Not medical advice.