Correct Gap 1 undo penalty: SessionState::score() already includes
undos × undo_penalty via SessionStats — undo IS tracked upstream,
just in SessionStats not KlondikeStats. Mark as ✅ upstream.
Add Gap 3 upstream-merged note: Session::solve() in card_game v0.4.0
is a budget-bounded DFS that replaces our 767-line solver. Document
SolveError mapping (both variants → Inconclusive).
Update 'Already has' table for v0.4.0: Session now derives Clone,
uses snapshot-based O(1) undo (StateSnapshot stores pre-move state +
instruction), and carries SessionConfig with solve budgets.
Mark Gap 8 (undo O(1)) resolved: card_game v0.4.0 uses snapshots,
same approach as our existing undo_stack.
Update integration path: steps 1/3/4/5 marked ✅; steps 2/6/7 remain.
Update references with new release commits and solver PR #14.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
funman300
aebb401c44