Research
Research memos are point-in-time evidence — dated snapshots that inform the spec, not the spec itself.
| Memo | Summary |
|---|---|
| Workers Cache for thumbnails (2026-07-07) | Cloudflare’s new pre-Worker Workers Cache keys on URL, not referrer — can’t front the variant path yet; value is request collapsing + SWR, sequenced after the Snippet URL-encodes the variant. |
| Workers Cache savings estimate (2026-07-07) | HTMA cost estimate: ~$1–$12/mo (central ~$5), ceiling ~$13/mo, negative if enabled naively — Workers Cache is not a cost play. |
| Watermark delivery flip & leverage ranking (2026-06-14) | Live re-probe found delivery flipped watermark-dominant; leverage ranking of flip candidates. |
| No-referrer traffic sources (2026-06-14) | Taxonomy of missing-referrer traffic; why dev detection uses referrer host, not UA. |