Customer App developer reference
Use these guides to identify the public Customer App boundary you need to implement or maintain. They explain responsibilities, prerequisites, observable results, and failure ownership without exposing private configuration or internal service contracts.
For customer-facing procedures and operational outcomes, use the Customer App product guides. A developer contract does not establish commercial entitlement or prove that a capability is enabled for a particular project, business, customer, or device.
These references describe stable responsibility boundaries. They do not document private routes, configuration values, credentials, deployment internals, or unsupported ways to change a live project.
Who should use these guides
| Reader | Use this area to | Use instead when |
|---|---|---|
| Implementer or maintainer | Choose and verify a public responsibility contract for an intended release and environment | The question is how a customer completes a product task |
| Client or operator | Understand which owner must confirm a configuration, business, account, order, device, or provider prerequisite | Follow the Customer App product guides for the customer journey |
Responsibility model
| Layer | Owns | Does not prove |
|---|---|---|
| Release and build owner | Packaged app inputs, supported platforms, native registrations, and release identity | Service authorization or runtime eligibility |
| Customer App | Presentation, local navigation, visible state, and safe handling of returned results | Commercial entitlement, another customer's access, or external completion |
| Ordering and configuration owner | Approved project/business policy, authorization, and server-side decisions | Device permission or provider success |
| Customer and order context | Current account, location, business, cart, and order prerequisites | That another context behaves identically |
| Operating system and provider | Permission state and provider-owned handoff/result | The final Customer App result until the app receives and presents it |
Customer App still owns safe integration and error handling when a provider owns the external result. A visible control proves presentation, not authorization or successful completion.
Choose the relevant contract
| Reader question | Reference |
|---|---|
| Which layer owns a Customer App variation? | Customer App configuration boundaries |
| How should supported app links be handled? | Customer App deep-link boundaries |
| Who owns permissions and native/provider handoffs? | Native integration boundaries |
| Where does Customer App responsibility end for payment? | Payment boundaries |
| Who owns external identity acceptance? | Social sign-in boundaries |
| Who owns notification permission, delivery, and routing? | Push-notification boundaries |
| What does the customer or operator experience? | Customer App overview |
| Where are public server authentication and schemas documented? | Developers, which routes readers to the canonical API Reference |
Verify a contract safely
- Identify the exact release, intended non-production project, platform, and responsible owner.
- Confirm prerequisites through supported public controls.
- Verify the Customer App's visible result without changing production configuration.
- When a flow crosses an operating-system or provider boundary, verify only the stage each party owns.
- Treat any unknown layer as unverified. Do not infer success from a visible control.
For example, record a capability as ready for verification only after the intended release, approved project policy, current business/customer prerequisites, and any required device permission are all verified. If one layer is unknown, keep the capability unverified.
Failure ownership
| Symptom | Responsible first owner | Safe next step |
|---|---|---|
| The same feature differs across releases | Release/build owner | Compare the exact supported builds and packaged capabilities |
| A conditional experience is missing | Authorized configuration/business owner | Verify entitlement and prerequisites without exposing raw values |
| One account or order behaves differently | Product journey plus account/order owner | Reproduce with an approved synthetic context and minimum redacted details |
| A permission or external handoff stops | Operating-system/provider contract owner | Verify the handoff and then the returned Customer App state separately |
| An unexpected configuration form appears | Security/configuration owner | Stop verification, keep the capability unverified, and escalate redacted context only |
Security and privacy
Never place configuration values, credentials, private identifiers, customer data, payment data, session material, or provider callback content in public URLs, examples, logs, screenshots, or support tickets. Record only the minimum redacted context needed to identify the release, environment, affected capability, and responsible owner.
When to recertify
Recertify an affected contract when packaged release inputs or native registrations change; a public configuration contract changes; navigation, authentication, permissions, or provider handoffs change; the configuration security disposition changes; or any App, shared-components, or API authority pin changes.
Troubleshooting
A control is visible but the action is unavailable
Treat presentation and authorization as separate results. Confirm the current business, account, order, device, and provider prerequisites through their owning public contracts.
The responsible owner is unclear
Start with the responsibility table above and stop at the first unverified layer. Escalate to that owner without copying raw configuration or customer data.