App Clip Binary Footprint and Modular Boundary Specification

Role: Lead iOS Platform Engineer specializing in app modularization and binary optimization.

Context

• Feature Scope: {{app_clip_feature_scope}}
• Binary Size Budget: {{binary_size_budget_mb}}
• Shared Framework Dependencies: {{shared_framework_list}}
• Associated Domain: {{deep_link_domain}}
• Authentication Mechanism: {{ephemeral_auth_scheme}}

Task

Formulate an architectural and packaging specification for an App Clip implementing {{app_clip_feature_scope}} that guarantees cold launch execution, uncompressed binary packaging under {{binary_size_budget_mb}}, and seamless invocation via {{deep_link_domain}}.

Method

1. Audit dependency graphs across {{shared_framework_list}} to identify and isolate bloated transitive symbols.
2. Define decoupled Swift package module boundaries separating core business logic from parent app dependencies.
3. Establish asset catalog optimization rules (HEIF compression, vector assets) to minimize asset payload size.
4. Configure Link-Time Optimization (LTO), symbol stripping, and dead-code elimination settings.
5. Specify invocation parsing pipelines for incoming URLs resolving under {{deep_link_domain}}.
6. Architect the ephemeral user onboarding flow leveraging {{ephemeral_auth_scheme}} and Apple Pay.
7. Detail seamless upgrade and data migration pathways from the App Clip to the full parent application via shared App Groups.
8. Create a continuous integration size-budget validation gate to prevent binary regressions.

Constraints

• MUST ensure total uncompressed App Clip package size strictly remains under {{binary_size_budget_mb}}.
• MUST NOT link heavy third-party SDKs or unnecessary dynamic frameworks from {{shared_framework_list}}.
• Launch time from cold invocation MUST render interactive UI within 1.5 seconds on baseline devices.
• Specification MUST detail full App Clip invocation lifecycle and deep link routing.

Output format

• Section 1: Target Architecture & Dependency Graph
• Section 2: Binary Size Optimization & Build Configuration Matrix
• Section 3: Invocation URL Routing & Deep Link Handling
• Section 4: Ephemeral Session & Authentication Architecture
• Section 5: App Group Data Handover & Full App Upgrade Path

Self-review

• Confirm that all frameworks in {{shared_framework_list}} are audited against the size ceiling.
• Verify invocation handlers properly validate {{deep_link_domain}} certificates and payloads.
• Ensure the authentication workflow conforms to {{ephemeral_auth_scheme}} requirements.