close the request-body todo: the proxy claims only what it forwards

todo/plugin-infrastructure/a-plugin-s-own-routes-lose-their-request-body.md

@@ -2,7 +2,7 @@
 id: plugin-infrastructure/a-plugin-s-own-routes-lose-their-request-body
 title: "A plugin that has a sidecar proxy loses the request body on its OWN routes"
 theme: plugin-infrastructure
-status: open
+status: done
 created: 2026-08-27
 date_source: stated
 order: 9
@@ -36,3 +36,11 @@ diagnosed while a phone was waiting. **The caldav plugin works around it locally
 which is most of them. They have not hit it because their own routes are GETs, or because their writes go
 to the sidecar. A plugin adding its first non-proxied POST will hit it, and the symptom — a required
 field reported missing on a request that plainly has it — points at the caller rather than at this.
+
+---
+
+**Done 2026-08-27** (`f00abe81` in the platform, and caldav's own repo). `createSidecarProxy` takes
+`proxiedSubPath`, so a proxy claims only what it forwards — caldav claims `/api/caldav/_officer` and its
+own routes are parsed normally. Omitted still means the whole prefix, so no other plugin changed.
+Caldav's local `jsonBody()` workaround is gone. Verified: a POST to the plugin's own route read its body,
+and the proxied namespace still reaches the sidecar.