[hyp36rmax]

Adds Development-only persistent runtime checkpoints to the existing passive collector and sanitized diagnostic export. Movie disappearance remains unknown; no natural completion or manual skip is inferred. Matching Windows Application Error metadata can establish an exception; nonzero exit codes alone cannot. No dumps, input hooks, registry changes or renderer/game patches are added.

Corrects an existing collector width-variable collision that prevented exit-code retrieval after observing movie geometry. Adds a reproducible local-only A/B assembler using identical B01 patching, game assets and configuration with the exact GCC/MSVCRT and LLVM/UCRT native builds. Only DLLs and their derived integrity/recovery hashes differ. Original game files are excluded from Git and CI.

Validation: 36 local regression checks passed; checkpoint, exit, unknown-state, exception correlation, privacy and lifecycle tests passed; Retail/JPRE Apply/Restore and package/source-lock checks passed. Two independent local JPRE installations are assembled with diagnostics Off until explicit UAT opt-in.

Windows ABI execution, repeated natural-completion/skip tests and the CTD cause remain NEEDS VALIDATION. Natural completion, manual skip confirmation and internal rendering milestones remain UNKNOWN in this passive approach. This is diagnostic preparation, not a claimed movie fix. Keep PR #3 and Experience unchanged.

[hyp36rmax]

Superseded by the approved movie-ownership integration merged through #5 and retained in Experience. Closing without merging the investigation implementation. Diagnostic findings and native-build comparison history remain preserved in local references and the verified cleanup recovery bundle.