Real-time SwiftUI can stutter under bursty feeds due to unbounded buffers, main-actor hot paths, or tasks that outlive their owners. Model each live source as an AsyncSequence with explicit buffering, cancellation, and isolation.

• Expose feeds via AsyncStream/AsyncThrowingStream with .bufferingOldest(N); call finish() on teardown and test “no emit after cancel.”
• Consume in views with task(id:); keep mutations on the @MainActor and check Task.isCancelled inside loops.
• Bridge delegates and legacy publishers at repository boundaries into AsyncStream so views subscribe to one model.
• Coalesce and parse off-main; hop back only for UI. Add OSSignposter around parse → diff → render to spot stalls.
• 🧪 Add async tests for cancel-after-start and run burst scenarios in Instruments;