Touchstone

Touchstone is a verification agent for anyone who works with data they can't fully trust, like analysts, finance teams, or anyone staring at a dashboard that's green but might be lying. The problem is that a pipeline turns green the moment data arrives, even when that data is wrong. It might be outdated, mislabeled, frozen, in the wrong currency, or just an unproven claim. Touchstone makes every value prove that it's true. It recomputes the number from a trusted source, resolves what it actually refers to, and checks it for corrections and freshness. Each value comes back as TRUE, or it gets auto fixed when Touchstone can prove the right answer (and it shows you exactly what it changed and why), or it's HELD and flagged for a human when there's no safe way to correct it. And when something shows up that no existing rule can explain, an agent steps in, works out the cause, writes a brand new check in Python, tests that check against past data to make sure it actually works, and waits for a person to approve it before trusting it. You hand Touchstone a messy dataset and it hands back clean, verified data along with a report of everything it fixed. It runs on real SEC filings with real companies, and the errors are planted on purpose and logged in the open, because you can't show that you catch lies unless you put some lies in front of it.