The next repo-local sweep target was ROADMAP #65: backlog-scanning
lanes could stop with prose-only summaries naming roadmap items, but
there was no machine-readable record of which items were chosen,
which were skipped, or whether the lane intended to execute, review,
or no-op. The fix teaches completed lane persistence to extract a
structured selection outcome while preserving the existing quality-
floor and review-verdict behavior for other lanes.
Constraint: Keep selection-outcome extraction on the existing `lane.finished` metadata path instead of inventing a separate event stream
Rejected: Add a dedicated selection event type first | unnecessary for this focused closeout because `lane.finished` already persists structured data downstream can read
Confidence: high
Scope-risk: narrow
Reversibility: clean
Directive: If backlog-scan summary conventions change later, update `extract_selection_outcome`, its regression test, and the ROADMAP closeout wording together
Tested: cargo fmt --all --check; cargo clippy --workspace --all-targets -- -D warnings; cargo test --workspace; architect review APPROVE after roadmap closeout update
Not-tested: Downstream consumers that may still ignore `lane.finished.data.selectionOutcome`
8f53524bd3