The scenario
A content moderation service accepts client submissions, applies synchronous API validation and throttling, then enqueues accepted items for asynchronous moderation.
What is in this drawing
Read the decisions behind it.
01
Return distinct 4xx responses for authentication, validation, rate limit, and duplicate failures
02
Enqueue accepted submissions and return 202 before moderation completes
03
Separate moderation decision into approve, reject, and escalate paths
Reuse when designing an ingestion API that must validate, deduplicate, and enqueue items for asynchronous human or automated review.
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