- Add reconstruct-v0.5-d-deconstruct-no21.md prompt (removes rule 21)
from original deconstruct-first prompt: 'Do not create artificial
uncertainties to increase their number.'
- Extend start-case-experiment-helper.cjs with --condition D and
--treatment no21 CLI flags for treatment selector apparatus
- Add programmatic treatment validation (rejects invalid treatments
cross-condition, validates only 'no21' is a valid treatment value)
- Condition D output uses freeformText field instead of reconstruction
JSON — avoids production JSON schema enforcement on freeform text
- Mock double supports freeform mode: returns deterministic raw text
instead of structured importantUnknowns when isFreeform=true
- Add 23 targeted tests: J (Condition D prompt selection),
J.1 (treatment validation), J.2 (prompt isolation verification)
- Fix existing B.1 assertions to use matchObject for execution field
