Photoshop's Maximize Compatibility checkbox, for one save: `maximizeCompatibility`
(true or false) on Save, Save As, Save a Copy, `app.save`, serve `doc.save`, MCP
`doc_save`/`doc_export`, Batch, Image Processor and Layers to Files decides the
merged image over Preferences > File Handling > Maximize PSD and PSB File
Compatibility; unset, the preference decides. Anything but a boolean is refused
before anything is written. The CLI takes `--no-maximize-compatibility`.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>