Start with sanitized logic, a script, a macro, or a small project slice.
Drop in the file nobody wants to touch.
BlackBox explains it in plain English. Paste a sanitized file or project slice, get a grounded assistant read, ask follow-ups, and export the readout when it is useful.
See behavior, dependencies, risks, evidence, and grounded follow-up answers.
Keep the readout, repeat the workflow, or request review only after the product read proves useful.