diff --git a/changelog.d/cloudflare-worker-deploy-filename.md b/changelog.d/cloudflare-worker-deploy-filename.md
new file mode 100644
index 00000000000..fc0578338a8
--- /dev/null
+++ b/changelog.d/cloudflare-worker-deploy-filename.md
@@ -0,0 +1,17 @@
+### Fixed
+
+- **The Worker deploy recipe now uploads a module Cloudflare can find.**
+  `infra/cloudflare/README.md`'s `curl` example named the multipart part
+  `worker.js=@infra/cloudflare/anyplot-api-proxy.js;type=application/javascript+module`,
+  but curl defaults the part's `filename` to the local file's basename
+  (`anyplot-api-proxy.js`) unless told otherwise, and Cloudflare resolves the
+  metadata's `main_module: "worker.js"` against that filename, not the form
+  field — so the API answered `400 — Uncaught Error: No such module:
+  worker.js` (observed live 2026-09-04). The example now sets
+  `filename=worker.js` explicitly, with a sentence explaining why. (#11222)
+
+- **The README's "needs a redeploy" callout is replaced with the deployed
+  state.** The Worker was redeployed from the current `.js` after #11221, the
+  Transform Rule now covers `anyplot.ai`, `www.anyplot.ai`, and
+  `api.anyplot.ai`, and `/api/event` measured `off-seen` — the callout named a
+  pending step that had already happened. (#11222)
diff --git a/infra/cloudflare/README.md b/infra/cloudflare/README.md
index 8483456abb9..853ddf320eb 100644
--- a/infra/cloudflare/README.md
+++ b/infra/cloudflare/README.md
@@ -20,12 +20,11 @@ verdicts, and one rollout procedure — the API's is done, the app's is
 **The `.js` is the source, not a draft.** Change it here and deploy it; change
 it in the dashboard and pull it back here.
 
-> **After this lands, the Worker needs a redeploy.** The
-> `X-Origin-Secret` lines are newer than the running script, so the repository
-> and the deployment are out of step until it is pushed. Until then the Worker
-> stamps nothing, `anyplot.ai/api/health` answers `off`, and arming the gate
-> would take that route down — which is exactly what the rollout order in the
-> pull-request description prevents.
+> **Deployed state (2026-09-04).** The Worker was redeployed from the current
+> `.js` after #11221; the Transform Rule now covers `anyplot.ai`,
+> `www.anyplot.ai`, and `api.anyplot.ai`, and `/api/event` measured `off-seen`.
+> The standing rule still holds: the `.js` here mirrors the deployed bytes, so
+> the next edit to it needs its own redeploy.
 
 ## The Worker
 
@@ -131,10 +130,17 @@ json.dump({
     "https://api.cloudflare.com/client/v4/accounts/{account}/workers/scripts/anyplot-api-proxy" \
     --config <(printf 'header = "Authorization: Bearer %s"\n' "$CF_API_TOKEN") \
     -F 'metadata=<-;type=application/json' \
-    -F 'worker.js=@infra/cloudflare/anyplot-api-proxy.js;type=application/javascript+module'
+    -F 'worker.js=@infra/cloudflare/anyplot-api-proxy.js;filename=worker.js;type=application/javascript+module'
 )
 ```
 
+**The explicit `filename=worker.js` is required.** Cloudflare resolves the
+`main_module` named in the metadata (`worker.js`) against each part's
+*filename*, not its form-field name; curl otherwise defaults the filename to
+the local file's basename (`anyplot-api-proxy.js`), which does not match, and
+the API answers `400 — Uncaught Error: No such module: worker.js` (observed
+live 2026-09-04).
+
 `pipefail` so a failing `python3` cannot be masked by a succeeding `curl`;
 `--fail-with-body` so an HTTP error is a non-zero exit and still prints
 Cloudflare's JSON reason, which plain `-f` swallows.