- New main quest granted after claiming "Leaving the Nest": land at the neutral capital (the bar), upgrade cargo bays, then deliver the sealed package to the home world.
- Introduce a non-tradeable `special-package` good (sheet frame 114) that no shop stocks or buys back; `Economy.isTradeable` filters it out of every floor and the sell grid refuses to queue it.
- Record story witnesses (`capitalLanded`, `launchedFromCapital`, `lastLandedWorld`, `delivered`) in a registry-backed ledger, persisted via SaveData so progress survives load and reset clears it.
- Gate the surface shop behind the capital landing: deck slot disabled and `toggleShop` refuses until `isShopUnlocked`.
- On capital departure, set the destination back to the home world so the compass marks the delivery leg; delivery proof is monotonic once recorded.
- Surface console note announces the package handoff when it first lands in the hold.
- Extend economy and quest test suites to cover the new check types, non-tradeable exclusion, unlock chain, and save/load of the story ledger.
