fix(coding-agent): allow session id for no-session runs

closes #6070

packages/coding-agent/src/main.ts

@@ -225,7 +225,6 @@ function validateSessionIdFlags(parsed: Args): void {
 		parsed.session ? "--session" : undefined,
 		parsed.continue ? "--continue" : undefined,
 		parsed.resume ? "--resume" : undefined,
-		parsed.noSession ? "--no-session" : undefined,
 	].filter((flag): flag is string => flag !== undefined);
 
 	if (conflictingFlags.length > 0) {
@@ -259,7 +258,7 @@ async function createSessionManager(
 	settingsManager: SettingsManager,
 ): Promise<SessionManager> {
 	if (parsed.noSession || parsed.help || parsed.listModels !== undefined) {
-		return SessionManager.inMemory(cwd);
+		return SessionManager.inMemory(cwd, parsed.sessionId !== undefined ? { id: parsed.sessionId } : undefined);
 	}
 
 	if (parsed.fork) {