diff --git a/fern/products/cli-api-reference/cli-changelog/2026-10-23.mdx b/fern/products/cli-api-reference/cli-changelog/2026-10-23.mdx
index 2fd507014..afcbb952a 100644
--- a/fern/products/cli-api-reference/cli-changelog/2026-10-23.mdx
+++ b/fern/products/cli-api-reference/cli-changelog/2026-10-23.mdx
@@ -1,3 +1,10 @@
+## 5.171.6
+**`(fix):`** `fern generate --preview` now asks sdk-gen-api for a file download instead of the
+generators.yml GitHub or registry output, matching Fiddle's dry-run preview. A
+`github.branch` set from `${ENV_VAR}` no longer fails with "Too small: expected string
+to have >=1 characters", and previews no longer request a push or publish.
+
+
 ## 5.171.5
 **`(chore):`** Internal cleanup: trailing-slash stripping, forward-slash path conversion and first-letter
 capitalization now use shared helpers instead of inline copies. No behavior change.