fix: show subcommand help on --help

src/cli/program/register.subclis.test.ts

@@ -21,7 +21,7 @@ const { nodesAction, registerNodesCli } = vi.hoisted(() => {
 vi.mock("../acp-cli.js", () => ({ registerAcpCli }));
 vi.mock("../nodes-cli.js", () => ({ registerNodesCli }));
 
-const { registerSubCliCommands } = await import("./register.subclis.js");
+const { registerSubCliByName, registerSubCliCommands } = await import("./register.subclis.js");
 
 describe("registerSubCliCommands", () => {
   const originalArgv = process.argv;
@@ -78,4 +78,20 @@ describe("registerSubCliCommands", () => {
     expect(registerNodesCli).toHaveBeenCalledTimes(1);
     expect(nodesAction).toHaveBeenCalledTimes(1);
   });
+
+  it("replaces placeholder when registering a subcommand by name", async () => {
+    process.argv = ["node", "clawdbot", "acp", "--help"];
+    const program = new Command();
+    program.name("clawdbot");
+    registerSubCliCommands(program, process.argv);
+
+    await registerSubCliByName(program, "acp");
+
+    const names = program.commands.map((cmd) => cmd.name());
+    expect(names.filter((name) => name === "acp")).toHaveLength(1);
+
+    await program.parseAsync(["node", "clawdbot", "acp"], { from: "user" });
+    expect(registerAcpCli).toHaveBeenCalledTimes(1);
+    expect(acpAction).toHaveBeenCalledTimes(1);
+  });
 });

src/cli/program/register.subclis.ts

@@ -19,9 +19,7 @@ const shouldRegisterPrimaryOnly = (argv: string[]) => {
 };
 
 const shouldEagerRegisterSubcommands = (argv: string[]) => {
-  if (isTruthyEnvValue(process.env.CLAWDBOT_DISABLE_LAZY_SUBCOMMANDS)) return true;
+  return isTruthyEnvValue(process.env.CLAWDBOT_DISABLE_LAZY_SUBCOMMANDS);
-  if (hasHelpOrVersion(argv)) return true;
-  return false;
 };
 
 const loadConfig = async (): Promise<ClawdbotConfig> => {
@@ -234,6 +232,15 @@ function removeCommand(program: Command, command: Command) {
   }
 }
 
+export async function registerSubCliByName(program: Command, name: string): Promise<boolean> {
+  const entry = entries.find((candidate) => candidate.name === name);
+  if (!entry) return false;
+  const existing = program.commands.find((cmd) => cmd.name() === entry.name);
+  if (existing) removeCommand(program, existing);
+  await entry.register(program);
+  return true;
+}
+
 function registerLazyCommand(program: Command, entry: SubCliEntry) {
   const placeholder = program.command(entry.name).description(entry.description);
   placeholder.allowUnknownOption(true);

src/cli/run-main.ts

@@ -10,6 +10,7 @@ import { assertSupportedRuntime } from "../infra/runtime-guard.js";
 import { formatUncaughtError } from "../infra/errors.js";
 import { installUnhandledRejectionHandler } from "../infra/unhandled-rejections.js";
 import { enableConsoleCapture } from "../logging.js";
+import { getPrimaryCommand, hasHelpOrVersion } from "./argv.js";
 import { tryRouteCli } from "./route.js";
 
 export function rewriteUpdateFlagArgv(argv: string[]): string[] {
@@ -47,7 +48,15 @@ export async function runCli(argv: string[] = process.argv) {
     process.exit(1);
   });
 
-  await program.parseAsync(rewriteUpdateFlagArgv(normalizedArgv));
+  const parseArgv = rewriteUpdateFlagArgv(normalizedArgv);
+  if (hasHelpOrVersion(parseArgv)) {
+    const primary = getPrimaryCommand(parseArgv);
+    if (primary) {
+      const { registerSubCliByName } = await import("./program/register.subclis.js");
+      await registerSubCliByName(program, primary);
+    }
+  }
+  await program.parseAsync(parseArgv);
 }
 
 function stripWindowsNodeExec(argv: string[]): string[] {