A rulebook of how money code breaks, and an agent that refutes its own findings

Money bugs pass review

Money bugs are rare per repository and expensive when they happen. Rounding that loses a

cent per invoice, a webhook that captures a payment twice on retry, a cached balance that

quietly drifts from the ledger. These do not look like bugs in review. The code compiles,

the tests pass, and the tests pass precisely because they use round numbers and one