diff --git a/fern/products/cli-api-reference/cli-changelog/2026-03-30.mdx b/fern/products/cli-api-reference/cli-changelog/2026-03-30.mdx
index e5d3d85da..918d67ed5 100644
--- a/fern/products/cli-api-reference/cli-changelog/2026-03-30.mdx
+++ b/fern/products/cli-api-reference/cli-changelog/2026-03-30.mdx
@@ -1,3 +1,11 @@
+## 4.50.0
+**`(feat):`** Auto-infer `x-fern-discriminator-context` for discriminated unions that
+match the SSE event spec shape. When all variants of a discriminated union
+have properties exclusively drawn from `{event, data, id, retry}` with
+correct types, the discriminator context is now inferred as `protocol`
+instead of defaulting to `data`. This applies to the legacy OpenAPI importer.
+
+
 ## 4.49.0
 **`(feat):`** Add `body-sort` option to webhook signature payload format. When set to
 `alphabetical`, POST body parameters are sorted by key before being