Overlay model

Agent Apps should be reusable. Customer-specific knowledge, credentials, scene ordering, and copy should live in overlays.

Precedence:

Workspace Override > User Overlay > Tenant Overlay > App Default > Host Default

Typical overlay fields:

• Bound Agent Knowledge packs.
• Tool credential references.
• Default model and budget hints.
• Presentation copy and scene order.
• Eval thresholds and review requirements.
• Disabled entries or optional capabilities.

Official app packages should remain upgradeable without overwriting customer state.