refactor(backend): backend 改名 provider，拆出 info 子命令

myagents/commands/info.py

@@ -0,0 +1,51 @@
+"""``xiaohe info`` — show current version, agent, and provider."""
+
+from __future__ import annotations
+
+from importlib.metadata import PackageNotFoundError, version
+
+import click
+from rich.console import Console
+from rich.table import Table
+
+console = Console()
+
+
+def _package_version() -> str:
+    try:
+        return version("myagents")
+    except PackageNotFoundError:
+        return "0.0.0"
+
+
+def _describe_runtime() -> str:
+    from myagents.commands.upgrade import _current_version
+
+    cur = _current_version()
+    return cur if cur else "development"
+
+
+@click.command("info")
+def info_cmd() -> None:
+    """Show xiaohe status: version, agent, and provider."""
+    from myagents.commands.switch import _resolve_agent
+    from myagents.claude_settings import describe_active_backend
+    from myagents.commands.provider import provider_list_table
+
+    table = Table(show_header=False, box=None, padding=(0, 1))
+    table.add_column("key", style="dim")
+    table.add_column("value")
+
+    table.add_row("Version", f"myagents {_package_version()}  (runtime: {_describe_runtime()})")
+
+    default_agent = _resolve_agent()
+    table.add_row("Agent", f"{default_agent}  (xiaohe → my{default_agent})")
+
+    table.add_row("Provider", describe_active_backend())
+
+    console.print(table)
+    console.print()
+    provider_list_table()
+    console.print()
+    console.print("[dim]Switch with:[/dim]")
+    console.print("  xiaohe switch version   xiaohe switch agent   xiaohe switch provider")

myagents/commands/provider.py

@@ -1,4 +1,4 @@
-"""``xiaohe backend`` — switch Claude Code's model backend."""
+"""``xiaohe switch provider`` — switch Claude Code's LLM provider."""
 
 from __future__ import annotations
 
@@ -30,7 +30,6 @@ def _secure_prompt_key(provider: Provider) -> str:
     try:
         return click.prompt(prompt_text, hide_input=True, err=True)
     except click.UsageError:
-        # click.prompt raises when stdin is not a TTY. Fall back to /dev/tty.
         try:
             with open("/dev/tty", encoding="utf-8") as tty:  # noqa: PTH123
                 return tty.readline().rstrip("\n")
@@ -40,16 +39,10 @@ def _secure_prompt_key(provider: Provider) -> str:
             ) from exc
 
 
-@click.group("backend")
-def backend_cmd() -> None:
-    """Switch Claude Code's model backend (DeepSeek, Kimi, Kimi Code, Claude)."""
-
-
-@backend_cmd.command("list")
-def backend_list() -> None:
-    """List built-in backends and the active one."""
+def provider_list_table() -> None:
+    """Print the provider list table (reusable from info command)."""
     active = get_active_provider()
-    console.print("[bold]Built-in backends:[/bold]")
+    console.print("[bold]Available providers:[/bold]")
     for provider in list_providers():
         marker = ""
         if active and active.id == provider.id:
@@ -65,32 +58,43 @@ def backend_list() -> None:
         )
 
 
-@backend_cmd.command("current")
-def backend_current() -> None:
-    """Show the active backend for this workspace."""
-    console.print(f"[bold]Current backend:[/bold] {describe_active_backend()}")
+@click.group("provider")
+def provider_cmd() -> None:
+    """Switch Claude Code's LLM provider (DeepSeek, Kimi, Kimi Code, Claude)."""
 
 
-@backend_cmd.command("use")
+@provider_cmd.command("list")
+def provider_list() -> None:
+    """List available providers and the active one."""
+    provider_list_table()
+
+
+@provider_cmd.command("current")
+def provider_current() -> None:
+    """Show the active provider."""
+    console.print(f"[bold]Active provider:[/bold] {describe_active_backend()}")
+
+
+@provider_cmd.command("use")
 @click.argument("provider_id")
 @click.option("--key", help="API key (scripting only; appears in shell history)")
-@click.option("--model", help="Override the default model for this provider")
+@click.option("--model", help="Override the default model")
 @click.option("--base-url", help="Override the provider base URL")
 @click.option("--yes", "-y", is_flag=True, help="Skip confirmation prompt")
-def backend_use(
+def provider_use(
     provider_id: str,
     key: str | None,
     model: str | None,
     base_url: str | None,
     yes: bool,
 ) -> None:
-    """Switch Claude Code to the given backend."""
+    """Switch to the given provider."""
     try:
         provider = get_provider(provider_id)
     except KeyError:
         known = ", ".join(p.id for p in list_providers())
         raise click.ClickException(
-            f"Unknown backend '{provider_id}'. Choose from: {known}"
+            f"Unknown provider '{provider_id}'. Choose from: {known}"
         )
 
     if is_third_party(provider):
@@ -98,7 +102,7 @@ def backend_use(
         if not resolved_key:
             resolved_key = _secure_prompt_key(provider)
         if not resolved_key:
-            raise click.ClickException("API key is required for this backend.")
+            raise click.ClickException("API key is required for this provider.")
     else:
         resolved_key = None
 
@@ -109,7 +113,7 @@ def backend_use(
         summary += f" (base-url: {base_url})"
 
     if not yes and not click.confirm(
-        f"Set backend to {summary} for this workspace?",
+        f"Switch LLM provider to {summary}?",
         default=True,
         err=True,
     ):
@@ -125,37 +129,37 @@ def backend_use(
     save_settings(settings)
     set_setting("backend_provider", provider.id)
 
-    console.print(f"[bold green]Backend switched to {summary}.[/bold green]")
+    console.print(f"[bold green]Switched to {summary}.[/bold green]")
     if provider.id == "claude":
         console.print(
-            "[dim]Cleared third-party backend env vars from ~/.claude/settings.json.[/dim]"
+            "[dim]Cleared third-party provider env vars from ~/.claude/settings.json.[/dim]"
         )
 
 
-@backend_cmd.command("reset")
+@provider_cmd.command("reset")
 @click.option("--yes", "-y", is_flag=True, help="Skip confirmation prompt")
-def backend_reset(yes: bool) -> None:
-    """Reset to the official Claude backend."""
+def provider_reset(yes: bool) -> None:
+    """Reset to the official Claude provider."""
     ctx = click.get_current_context()
-    ctx.invoke(backend_use, provider_id="claude", yes=yes)
+    ctx.invoke(provider_use, provider_id="claude", yes=yes)
 
 
-@backend_cmd.group("key")
-def backend_key() -> None:
+@provider_cmd.group("key")
+def provider_key() -> None:
     """Manage stored API keys."""
 
 
-@backend_key.command("set")
+@provider_key.command("set")
 @click.argument("provider_id")
 @click.option("--key", help="API key (scripting only; appears in shell history)")
-def backend_key_set(provider_id: str, key: str | None) -> None:
-    """Store an API key for a backend without switching to it."""
+def provider_key_set(provider_id: str, key: str | None) -> None:
+    """Store an API key without switching."""
     try:
         provider = get_provider(provider_id)
     except KeyError:
         known = ", ".join(p.id for p in list_providers())
         raise click.ClickException(
-            f"Unknown backend '{provider_id}'. Choose from: {known}"
+            f"Unknown provider '{provider_id}'. Choose from: {known}"
         )
 
     if provider.id == "claude":
@@ -175,22 +179,17 @@ def backend_key_set(provider_id: str, key: str | None) -> None:
     )
 
 
-@backend_key.command("rm")
+@provider_key.command("rm")
 @click.argument("provider_id")
-@click.option(
-    "--yes",
-    "-y",
-    is_flag=True,
-    help="Skip the confirmation prompt",
-)
-def backend_key_rm(provider_id: str, yes: bool) -> None:
-    """Remove the stored API key for a backend."""
+@click.option("--yes", "-y", is_flag=True, help="Skip the confirmation prompt")
+def provider_key_rm(provider_id: str, yes: bool) -> None:
+    """Remove the stored API key for a provider."""
     try:
         provider = get_provider(provider_id)
     except KeyError:
         known = ", ".join(p.id for p in list_providers())
         raise click.ClickException(
-            f"Unknown backend '{provider_id}'. Choose from: {known}"
+            f"Unknown provider '{provider_id}'. Choose from: {known}"
         )
 
     if not yes and not click.confirm(
@@ -208,4 +207,4 @@ def backend_key_rm(provider_id: str, yes: bool) -> None:
 
 
 if __name__ == "__main__":
-    backend_cmd()
+    provider_cmd()

myagents/commands/switch.py

@@ -1,23 +1,29 @@
-"""``xiaohe switch`` — move ``current`` to another installed runtime version.
+"""``xiaohe switch`` — switch version, agent, or provider.
 
-Rollback/roll-forward counterpart to ``xiaohe upgrade``: repoints the
-``current`` symlink, reinstalls the CLI tools from that runtime, and re-syncs
-the workspace. Run without an argument to list installed versions and pick
-one interactively.
+Subcommands:
+    version   — switch the active runtime version (rollback/roll-forward)
+    agent     — switch the default agent CLI (claude / kimi / codex / hermes)
+    provider  — switch Claude Code's LLM provider (DeepSeek / Kimi / Kimi Code / Claude)
 """
 
+from __future__ import annotations
+
 import click
 from rich.console import Console
 
-from myagents.commands.sync_workspace import _print_report, sync_workspace
-from myagents.commands.upgrade import _current_version, _install_tools, _runtime_root
+from myagents.entrypoints import _KNOWN_BACKENDS
 from myagents.project_root import get_workspace_root
+from myagents.settings import get_setting, set_setting
 
 stderr_console = Console(stderr=True)
 console = Console()
 
 
+# ── version ────────────────────────────────────────────────────────────────
+
 def _installed_versions() -> list[str]:
+    from myagents.commands.upgrade import _runtime_root
+
     root = _runtime_root()
     if not root.is_dir():
         return []
@@ -26,11 +32,14 @@ def _installed_versions() -> list[str]:
     )
 
 
-@click.command("switch")
+@click.command("version")
 @click.argument("version", required=False)
 @click.option("--yes", is_flag=True, help="Skip the confirmation prompt")
-def switch_cmd(version: str | None, yes: bool) -> None:
+def switch_version(version: str | None, yes: bool) -> None:
     """Switch the active runtime to another installed version (rollback)."""
+    from myagents.commands.sync_workspace import _print_report, sync_workspace
+    from myagents.commands.upgrade import _current_version, _install_tools, _runtime_root
+
     versions = _installed_versions()
     current = _current_version()
     if not versions:
@@ -82,3 +91,76 @@ def switch_cmd(version: str | None, yes: bool) -> None:
         f"\n[bold green]Switched: {current} -> {version}[/bold green] "
         "(open a new terminal to pick up the change)"
     )
+
+
+# ── agent ──────────────────────────────────────────────────────────────────
+
+def agent_list_table() -> None:
+    """Print the agent list (reusable from info command)."""
+    default = _resolve_agent()
+    console.print("[bold]Available agents:[/bold]")
+    for name in _KNOWN_BACKENDS:
+        marker = " [green](current)[/green]" if name == default else ""
+        console.print(f"  {name}{marker}")
+
+
+def _resolve_agent() -> str:
+    import re
+
+    agent = str(get_setting("default_agent", "") or "")
+    agent = re.sub(r"^my", "", agent.strip().lower())
+    return agent if agent in _KNOWN_BACKENDS else "claude"
+
+
+@click.command("agent")
+@click.argument("agent", required=False)
+def switch_agent(agent: str | None) -> None:
+    """Switch the default agent CLI."""
+    known = list(_KNOWN_BACKENDS)
+    default = _resolve_agent()
+
+    if not agent:
+        console.print("[bold]Available agents:[/bold]")
+        for name in known:
+            marker = " [green](current)[/green]" if name == default else ""
+            console.print(f"  {name}{marker}")
+        agent = str(click.prompt("Switch to", err=True))
+
+    agent = agent.strip().lower()
+    if agent.startswith("my"):
+        agent = agent[2:]
+    if agent not in _KNOWN_BACKENDS:
+        raise click.ClickException(
+            f"Unknown agent '{agent}'. Choose from: {', '.join(known)}"
+        )
+    if agent == default:
+        console.print(f"Already on {agent}.")
+        return
+
+    set_setting("default_agent", agent)
+    console.print(f"[bold green]Switched default agent to {agent}.[/bold green]")
+    console.print(f"[dim]Use 'xiaohe' (or 'my{agent}') to launch.[/dim]")
+
+
+# ── switch group ───────────────────────────────────────────────────────────
+
+@click.group("switch", invoke_without_command=True)
+@click.pass_context
+def switch_cmd(ctx: click.Context) -> None:
+    """Switch version, agent, or provider.
+
+    Run without arguments to see all options.
+    """
+    if ctx.invoked_subcommand is None:
+        console.print("[bold]Use one of:[/bold]")
+        console.print("  xiaohe switch version   — switch runtime version")
+        console.print("  xiaohe switch agent     — switch default agent CLI")
+        console.print("  xiaohe switch provider  — switch LLM provider")
+        console.print()
+        console.print("[dim]Run 'xiaohe switch <subcommand> --help' for details.[/dim]")
+
+
+switch_cmd.add_command(switch_version)
+switch_cmd.add_command(switch_agent)
+
+# provider_cmd is added in entrypoints.py (lazy import to avoid cycles)

myagents/entrypoints.py

@@ -26,16 +26,19 @@ def default_agent() -> str:
 
 
 def build_xiaohe_cli():
-    """The ``xiaohe`` command group: agent forwarding + init/sync/upgrade/switch/uninstall/version."""
-    from myagents.commands.backend import backend_cmd
+    """The ``xiaohe`` command group: agent forwarding + info/init/sync/upgrade/switch/uninstall/version."""
+    from myagents.commands.info import info_cmd
+    from myagents.commands.provider import provider_cmd
     from myagents.commands.switch import switch_cmd
     from myagents.commands.sync_workspace import init_cmd, sync_cmd
     from myagents.commands.uninstall import uninstall_cmd
     from myagents.commands.upgrade import upgrade_cmd
     from myagents.commands.version import version_cmd
 
+    switch_cmd.add_command(provider_cmd)
+
     xiaohe_cli = build_cli(default_agent(), prog_name="xiaohe", offer_install=True)
-    xiaohe_cli.add_command(backend_cmd)
+    xiaohe_cli.add_command(info_cmd)
     xiaohe_cli.add_command(init_cmd)
     xiaohe_cli.add_command(sync_cmd)
     xiaohe_cli.add_command(upgrade_cmd)