yaml-cpp master hardens zombie nodes: operator=, size(), Type() and
chained operator[] all throw InvalidNode instead of silently passing.
Storing per-component nodes via Node::operator= threw for every key
that was absent, so all 7 entities were skipped on load (0 loaded).
Reads are now level-by-level guarded (copy-init + IsDefined), which
only uses the safe surface (as<T>(fallback), begin(), IsDefined).
Save side switched from node-tree streaming to a manual Emitter:
vector/quat fields emit as single-line flow arrays ([0, 1.2, -6])
and model refs as inline maps, with 9-digit float precision for
lossless float32 round-trips.
Verified offline against the previously saved scene: 7/7 entities
parse with correct component counts; emitter output round-trips.
atdunbg
e2a9c21e68