Valuation consistency checks

Most bad valuations contain no wrong number. They are internally inconsistent. Cash flows sit in one currency and the discount rate was built in another. Growth appears that nobody paid for. Terminal growth runs above the economy's. A method the company's own type rules out was used anyway.

Each of those looks defensible when you stare at it alone. Only a check that reads several artifacts at once catches them. That is what this script does.

Treat it as a loop, not a report:

run it  ->  fix what it flags  ->  run it again  ->  no errors left

You are done when the run comes back with zero errors and every warning has a written defence. A warning you cannot defend is an error you have not admitted yet.