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+## 0.46.3
+**`(fix):`** Custom headers are applied when the SDK runs through an injected `RequestExecutor` (the path
+used by generated CLI custom commands). `ClientConfig::custom_headers` — including an
+`X-Source`-style override and the `X-Fern-*` platform headers — and
+`RequestOptions::additional_headers` were previously dropped before delegating to the executor,
+so they reached the wire on generated-path requests but not on custom-command ones. Auth and
+retries remain the executor's responsibility.
+
+