principle-sequence-verifiable-units

# Sequence work into verifiable units Order work as a sequence of small units, each ending in a state you can check, and don't advance until the current one is green. **Why:** A break caught at the unit that caused it is cheap to localize. A break caught after a batch is buried, and you have already built further on a broken base. Sequencing those same units into a delivery a reviewer can replay turns "trust me" into "watch it go red, then green." **Execution.** In a sweep, migration, or any run of similar edits, verify each change before starting the next. Each unit is a before/after bracket: known-good state, one change, run the check, then proceed. Rebase onto clean trunk first so every check measures against the real baseline. When a lever does the edits, the per-unit check is nearly free; run it anyway. **Delivery.** Stack commits and PRs in the order that proves the work. The canonical shape is the failing test first, then the fix on top. Other story orders are a subtraction before the reshape, a baseline capture before the treatment, the scaffold before the feature. Each commit lands on its own and the sequence reads as an argument. **Pattern:** - Pick the smallest unit that ends in a check: an edit plus its test, or a commit that stands alone. - Verify before advancing. Red to green per unit, never deferred to a final batch. - Order the units so the sequence builds confidence on its own, for you while executing and for a reviewer reading the stack. The sequencin...