Cache numeric tab/list/node state and eight transition boundaries without navigation I/O. Emit one expanded first-failure snapshot with up to 16 live callers per allocator route. Patch 0079 adds 11 anchors (139 -> 150); enable frontend hooks only in diagnostic mode.
Verification: PS5_MEMORY_DIAGNOSTICS=1 bash tools/verify.sh (all five gates, 69 tests); python3 tools/check-memory-diagnostics.py. Evidence: evidence/xmb-first-failure-diagnostic/. Injected 10006 failures produce one expanded snapshot and 9404 bytes. Uploaded with verified readback; no console launch or runtime fix claimed.
Keep native/mapped allocation policy intact; observe aligned Vulkan host allocations and texture/queue-idle lifetimes with allocation-free failure logging and periodic summaries. Snapshot driver archives locally for an attributable diagnostic link.
Verified: PS5_MEMORY_DIAGNOSTICS=1 bash tools/verify.sh; final bash tools/verify.sh format unit (68 tests); python3 tools/check-memory-diagnostics.py. Evidence: evidence/xmb-memory-diagnostic/{capture,expectation,inspection}.json. Console validation pending owner intervention; no upload or launch and no crash fix claimed.
Mihawk