diff --git a/CHANGELOG.md b/CHANGELOG.md
index e77bc32189..464dd93a5c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -21,6 +21,8 @@
 - **fix(executors):** truncate tools array to 128 items max in GitHub Copilot and OpenCode executors to mitigate 400 Bad Request errors from upstream (#1687)
 - **fix:** add body-read timeout to prevent stuck pending requests (#1680)
 - **fix(rate-limit):** replace unsupported Bottleneck `maxWait` option with job-level `expiration` to prevent indefinite queue stalls (#1694)
+- **fix(sse):** sanitize OpenAI tool schemas for strict upstream validators — strips null from enum arrays, normalizes tuple items, filters invalid required keys (#1692)
+- **fix(stream):** fail zombie SSE streams before accepting response — returns 504 instead of hanging indefinitely, enables combo fallback (#1693)
 - **fix:** combo retry loop stops immediately on client disconnect (499) (#1681)
 - **fix(search):** support optional bearer auth for SearXNG (#1683)
 - **fix(vision):** respect native GPT vision support — prevents VisionBridge from intercepting models that already handle images natively (#1678)