docs(release-notes): v0.188.0 (#1888)

Author: sg-doc-holiday[bot]

RELEASE_NOTES.md

@@ -4,6 +4,23 @@ title: Release notes
 
 # Release notes
 
+## v0.188.0
+
+- **Date:** 2026-07-14
+- **Version:** 0.188.0
+
+### Summary
+
+This release lets `leiosnotify` producers confirm that responses were written before they commit or release delivery state, and it refreshes published documentation to reflect current protocol coverage and test scope.
+
+### New Features
+
+* Improved `leiosnotify` response handling so producers can confirm that a `RequestNext` response was written before they commit or release delivery state, and failed sends or shutdowns now return a clear error instead of only confirming that the response was queued for sending.
+
+### Additional Changes
+
+* Updated published documentation to reflect current protocol coverage, Dijkstra ledger support, and the latest conformance and test totals without changing library runtime behavior.
+
 ## v0.187.4
 
 - **Date:** 2026-07-14