Add short flag -sc for --speculative-config argument (vllm-project#38380)

mgoin · claude · puririshi98 · commit 3d65aa19d970 · 2026-04-07T16:58:41.000Z
Co-authored-by: Claude &lt;noreply@anthropic.com&gt;
Signed-off-by: Rishi Puri &lt;riship@nvidia.com&gt;
diff --git a/vllm/engine/arg_utils.py b/vllm/engine/arg_utils.py
@@ -1301,7 +1301,7 @@ def add_cli_args(parser: FlexibleArgumentParser) -> FlexibleArgumentParser:
         # delay the Pydantic validation that comes with SpeculativeConfig.
         vllm_kwargs["speculative_config"]["type"] = optional_type(json.loads)
         vllm_group.add_argument(
-            "--speculative-config", **vllm_kwargs["speculative_config"]
+            "--speculative-config", "-sc", **vllm_kwargs["speculative_config"]
         )
         vllm_group.add_argument(
             "--kv-transfer-config", **vllm_kwargs["kv_transfer_config"]

Original file line number	Diff line number	Diff line change
`@@ -1301,7 +1301,7 @@ def add_cli_args(parser: FlexibleArgumentParser) -> FlexibleArgumentParser:`
`1301`	`1301`	`# delay the Pydantic validation that comes with SpeculativeConfig.`
`1302`	`1302`	`vllm_kwargs["speculative_config"]["type"] = optional_type(json.loads)`
`1303`	`1303`	`vllm_group.add_argument(`
`1304`		`- "--speculative-config", **vllm_kwargs["speculative_config"]`
	`1304`	`+ "--speculative-config", "-sc", **vllm_kwargs["speculative_config"]`
`1305`	`1305`	`)`
`1306`	`1306`	`vllm_group.add_argument(`
`1307`	`1307`	`"--kv-transfer-config", **vllm_kwargs["kv_transfer_config"]`