ln-42-acceptance-test-builder

# Acceptance Test Builder **Goal:** Create executable evidence that stated requirements work through the boundary users or external systems observe. Modify only the approved test and test-documentation scope. If a test exposes a product defect, preserve the evidence and report it instead of repairing production code. **Execution contract:** Treat the ordered checkbox workflow below as this skill's Definition of Done. Work through every item in order, and mark it complete only when its action and required evidence are complete. `N/A`, skipped, unavailable, or delegated items remain incomplete. Before returning, apply this skill's verdict, decision, and approval rules to every incomplete item and prepend **Checklist: X/Y complete**<br>**Incomplete: None | section/item — reason; outcome impact; exact next action**; list every incomplete item. ## Tool Routing | Need | Preferred tool | Use it when | Fallback | |---|---|---|---| | Workspace safety | Git status, diff, repository instructions, and branch or worktree inspection | Always before editing | Stop when user changes cannot be separated safely | | Existing test conventions | File listing, search, manifests, runner configuration, CI, and focused reads | Selecting the project-native runner, layout, fixtures, and commands | Follow the nearest maintained test pattern | | Behavior and wiring | Language server or host-native code intelligence | Locating observable entrypoints, registration, consumers, and state boundaries | Nar...