Summon v0.9.0 - Application Architecture

Focus: Robust patterns for data, forms, and state. Goal: Standardize how applications handle data flow and side effects.

28. Query/Mutation Library

Requirement: A data fetching library with caching and synchronization (similar to TanStack Query). Technical Specs:

• Caching: Cache responses by query key.
• Deduplication: Combine multiple simultaneous requests for the same key.
• Revalidation: Auto-refetch on window focus, network reconnect, or interval.
• State: Expose isLoading, isError, data states.
• Mutations: Handle side effects (POST/PUT/DELETE) and invalidate related queries.

29. Form State Manager

Requirement: Simplify form validation and state handling. Technical Specs:

• State Tracking: Track values, touched state, and dirty state for fields.
• Validation: Support synchronous and asynchronous validation rules.
• Submission: Handle form submission, including loading state and error handling.
• Composability: Easy integration with UI components via state hoisting.

30. Middleware

Requirement: Intercept and modify requests/responses in the SSR pipeline. Technical Specs:

• Interception: Hook into the request lifecycle before rendering.
• Routing Control: Redirect requests based on logic (e.g., auth checks).
• Headers: Modify response headers (cookies, caching).
• Context: Inject data into the request context for the application to use.

31. Suspense & Error Boundaries

Requirement: Declarative handling of async loading states and errors. Technical Specs:

• Suspense: A container that shows a fallback UI while its content is "suspending" (waiting for async data).
• Error Boundary: A container that catches exceptions from its children and displays a fallback UI instead of crashing the app.
• Recovery: Mechanism to reset the error boundary and retry rendering.

32. Instance Hydration

Requirement: Hydrate application state from a forked or cloned instance. Technical Specs:

• State Transfer: Serialize and deserialize complete application state for transfer between instances.
• Partial Hydration: Support hydrating specific subtrees or state slices.
• Conflict Resolution: Handle state conflicts when merging divergent instances.
• Snapshot API: Create and restore state snapshots programmatically.

33. Pluggable Network Layer

Requirement: Abstract network operations to allow custom transport implementations. Technical Specs:

• Interface: Define NetworkAdapter interface for pluggable HTTP/transport implementations.
• Default: Provide default Ktor-based implementation.
• Custom Transports: Allow custom transport layers (WebSocket, custom protocols) to be injected.
• Interceptors: Support request/response interceptors at the adapter level.