Use compact XMB nodes and reclaimable mapped slabs for nodes/callbacks. Check list construction and copy failures, stop failed population, and rebuild consumers when patched headers change.
Verified both diagnostic and normal builds with all five tools/verify.sh gates, 71 tests, and 278 frontend sources. Owner confirms crash-free navigation and normal build resolves periodic hitches; existing logging retained.
Evidence: evidence/xmb-safe-list-run/{capture,expectation,diagnostic-build,normal-build}.json. Replay: bash tools/verify.sh format evidence. Accepted normal identity: 2d0743abbcf289efd0a549929d25ce7512968fc93cba8163467fdd3641c8fcf6.
