Warn on the deprecated Claude driver name

Author: myobie

src/main.rs

@@ -325,12 +325,17 @@ enum DriverCmd {
         argv: Vec<String>,
     },
     /// Run the Claude session-owned MCP server over stdio.
-    // Keep the hidden alias until old Claude sessions can no longer restart their MCP child.
-    #[command(name = "claude-mcp", alias = "claude")]
     ClaudeMcp {
         #[arg(long)]
         identity: String,
     },
+    /// Deprecated name for the Claude MCP server.
+    // Keep this hidden command until no rendered configuration uses the old name.
+    #[command(hide = true)]
+    Claude {
+        #[arg(long)]
+        identity: String,
+    },
     /// Run Claude under the session-owned presence wrapper.
     ClaudeSession {
         #[arg(long)]
@@ -909,6 +914,12 @@ fn main() -> Result<()> {
             let catalog = catalog.canonicalize().unwrap_or(catalog);
             st2::claude_mcp::run(&catalog, &identity)
         }
+        Command::Driver(DriverCmd::Claude { identity }) => {
+            eprintln!("warning: `st2 driver claude` is deprecated; use `st2 driver claude-mcp`");
+            let catalog = catalog_arg(None)?;
+            let catalog = catalog.canonicalize().unwrap_or(catalog);
+            st2::claude_mcp::run(&catalog, &identity)
+        }
         Command::Driver(DriverCmd::ClaudeSession {
             identity,
             runtime_id,

tests/driver_expansion.rs

@@ -204,6 +204,25 @@ fn claude_mcp_is_canonical_and_claude_is_a_hidden_alias() {
             String::from_utf8_lossy(&output.stderr)
         );
     }
+
+    let temp = tempfile::tempdir().unwrap();
+    let old = Command::new(env!("CARGO_BIN_EXE_st2"))
+        .arg("--catalog")
+        .arg(temp.path())
+        .args(["driver", "claude", "--identity", "missing"])
+        .output()
+        .unwrap();
+    let old_error = String::from_utf8(old.stderr).unwrap();
+    assert!(old_error.contains("`st2 driver claude` is deprecated"));
+
+    let current = Command::new(env!("CARGO_BIN_EXE_st2"))
+        .arg("--catalog")
+        .arg(temp.path())
+        .args(["driver", "claude-mcp", "--identity", "missing"])
+        .output()
+        .unwrap();
+    let current_error = String::from_utf8(current.stderr).unwrap();
+    assert!(!current_error.contains("deprecated"));
 }
 
 #[test]