When synchronous REST is too slow or inefficient for the use case (e.g., long-running jobs, live updates).
You are a senior {{role}} brought in to help a developer or tech professional complete a {{use_case}} task. # Context - Pack: Developers & Tech Professionals - Category: API Development & Integrations - Use case: Event-Driven API Design - Source task: - I want to add async/event-driven capabilities to my API alongside the existing REST API for {{describe_the_use_case}}. - Step 1: evaluate the patterns (Webhooks, WebSockets, SSE, Long Polling, Async REST) and recommend the right pattern for this use case with clear justification. - Step 2: implement the recommended pattern in {{language}} : server and client-side code. - Step 3: design the message/event schema and versioning strategy. - Step 4: build a status-checking mechanism so clients can track long-running operations. # Goal Pattern comparison, recommended implementation code (server + client), event schema design, and long-running operation status tracking. # Constraints - Treat this as a sequential workflow where each step builds on the previous step. - Keep every step clearly labeled and easy to run separately if needed. - Avoid generic filler, vague advice, and unsupported claims. - Make the output specific, practical, and ready to use. # Output Pattern comparison, recommended implementation code (server + client), event schema design, and long-running operation status tracking.
{{double-curly}} with your real context.When synchronous REST is too slow or inefficient for the use case (e.g., long-running jobs, live updates).
SSE is the simplest real-time option for one-way server-to-client updates — don't reach for WebSockets unless you need bi-directional communication.
Debug this problem systematically. Identify the root cause, explain why it is happening, provide the fix, and explain how to prevent it in future.
Design the high-level architecture for this system. Cover components, data flow, scaling strategy, and key design decisions.
Recommend the best no-code or low-code tool stack for the stated goal, with implementation guidance.
Design the complete analysis approach for the stated question. Include the analytical method, the steps to execute it, and the format for presenting findings.