A finished-looking result can hide unfinished work
A ledger can balance while an unexplained amount remains in suspense. The final number is informative, but it does not establish that reconciliation is complete.
Invariants make the requirements explicit: original records must be preserved, each adjustment must cite evidence, and unresolved suspense balances must be zero at close.
The process is part of the result.
Which records should we retain?
Keep the initial state, every tool call, the observed results, and the state changes. Both tasks and verifiers need explicit versions so disagreements can be traced to their source.
These records let reviewers ask: which step changed the data? Where did the evidence come from? Was the final state reached through an allowed sequence of actions?
This is a design draft. It does not report experimental results.