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# Edge Cache Invalidation — Guardrails
<details>
<summary><strong>🧭 Quick Return to Map</strong></summary>
<br>
> You are in a sub-page of **Cloud_Serverless**.
> To reorient, go back here:
>
> - [**Cloud_Serverless** — scalable functions and event-driven pipelines](./README.md)
> - [**WFGY Global Fix Map** — main Emergency Room, 300+ structured fixes](../README.md)
> - [**WFGY Problem Map 1.0** — 16 reproducible failure modes](../../README.md)
>
> Think of this page as a desk within a ward.
> If you need the full triage and all prescriptions, return to the Emergency Room lobby.
</details>
A practical repair guide for CDN and edge caches when your app ships new prompts, models, or assets. Use this to keep caches consistent across regions and prevent old content from leaking back in after a deploy or rollback.
## When to use this page