User decision 2026-07-12: when the constructed-definition normalization
mechanism lands, define_docs converts from its interim left-margin
authoring to indented-plus-normalized authoring, remaining the
acceptance criterion's consumer proof as written. Left-margin authoring
via -unindentedfields stays a supported style proven by the rendering
tests, but is not the preferred style for define_docs itself.
Assisted-by: harness=claude; primary-model=claude-fable-5; api-location=anthropic.com