# Build Validation 005 — Warning-Free MSVC and Option-0 STOP

## Result

PFES-WORK-001 is closed.

The merged disc dumper built successfully using the Visual Studio 2026 x86
toolchain with no compiler warnings and no compiler errors.

- compiler: Microsoft C/C++ 19.50.35727
- target: x86
- executable: `bin\disc_dump_msvc.exe`
- size: 237,568 bytes
- SHA-256:
  `3B70F9E5C909E8D9225F2CBA2D4BA28819B9CB43F6383322C8ECF9BBCF6AB234`

## Runtime Validation

The MSVC binary successfully completed:

- `/list`;
- GDR-8050L discovery;
- initial authentication;
- media-transition eject/close;
- START UNIT when needed;
- post-transition reauthentication;
- XDFS enumeration;
- title and media metadata discovery;
- menu presentation;
- option-0 cancellation;
- automatic STOP UNIT before exit.

The final cancellation path reported:

```text
Operation cancelled by user.
Stopping drive before exit...
Sending SCSI STOP UNIT / spin-down command...
SCSI STOP UNIT / spin-down successful.

Process complete.
```

No full dump was required because the shared content writer and XGD1 output
were already validated independently.

## Evidence

- `Evidence/msvc_warning_free_option0_auto_stop_runtime.txt`
- `Evidence/MSVC_OPTION0_FINAL_ACCEPTANCE.json`

Evidence transcript SHA-256:

```text
781408dc1efb950ee928802361db49592bb26f350eb753555e9cb887994b1582
```

## Interpretation

This closes the actual MSVC compile/link and non-dumping runtime gate.
The differing structure sizes previously observed between x86 and x64 builds
remain explained by pointer width and are not an ABI failure.
