Vercel Cache Reason：不要把 MISS、BYPASS、STALE 当成同一个问题
Tech
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status 说明发生了什么，reason 解释为什么。按原因衡量延迟、源站负载与新鲜度。
| Status | Reason | Action |
|---|---|---|
| MISS | Cold | Check prerender and lifetime |
| BYPASS | Crawler / Draft Mode | Confirm intentional bypass |
| STALE | Revalidation error | Investigate origin while stale serves |
Operational checklist
✓Group metrics by cache_reason
✓Separate latency, origin load, and freshness
✓Do not optimize intentional bypass as a miss