principle-sequence-verifiable-units
About principle-sequence-verifiable-units
A development skill for breaking migrations, sweeps, and similar work into small changes that are checked before proceeding. It also orders commits so the delivery sequence demonstrates how the work was verified.
Key features
- 01One change per verification unit
- 02Check before moving to the next unit
- 03Order commits as evidence
- 04Rebase onto a clean baseline
Use cases
- 01Verifying each edit in a migration
- 02Sequencing a failing test before its fix
- 03Reviewing a series of changes through stacked commits
Install
Copy the command and run it in a terminal.
npx skills add https:/After installing, type/principle-sequence-verifiable-unitsin Claude Code to confirm it loaded.
Details
From the project READMESequence 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.
The sequencing complement to the prove-it-works principle skill, which keeps each check real, and the build-the-lever principle skill, which makes the per-unit check cheap.