Three critical bugs that break API gateway config sync and how to fix them

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A technical deep-dive identifies three common bugs that undermine idempotent configuration syncing with API gateways like Kong. The first bug causes a full sync abort when a 409 Conflict error is thrown instead of treating the response as confirmation that the desired state already exists. The second bug stems from reading only the first page of a paginated list API, causing the sync to misidentify existing records as missing or orphaned, leading to erroneous creates or deletions. A third bug allows scoped plugins to silently escape to global scope when scope is not explicitly enforced during sync. The core lesson is that a gateway sync must be a converge operation — not a one-shot create — so that re-running it produces no unintended changes.

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