Execution

Preview

Running the code that was written, in a real environment.

Every generated change is executed. Compilation is a precondition, not evidence — evidence is observed behaviour.

Execution levels#

LevelWhat it provesCost
Type check / compileThe change is syntactically and statically validLow
Unit testThe unit behaves as specifiedLow
Integration testComponents interact correctlyMedium
Local service runThe service starts and serves requestsMedium
Scenario exerciseThe reported user-facing symptom is goneHigher

The planner selects the cheapest level that covers the change, and escalates only when the change class demands it — a schema migration is not proven by a unit test.

Captured execution record
$ pnpm test -- --filter checkout
  ✓ guest checkout applies zero-rate tax for non-EU  (12ms)
  ✓ guest checkout resolves EU tax profile           (31ms)   ← new
  ✓ registered checkout unchanged                    (18ms)

  3 passed · exit 0 · 2.41s

Last updated 2026-09-01