[Task]: GH-C06 extract Goal Channel runtime CLI ownership

[LIHUA919]

Task ID or area

GH-C06

Technical direction

Core control-plane hardening

Intent

I want to claim an existing task

Summary

loopx/cli_commands/goal_channel.py currently owns both the Lark Goal Channel CLI and the built-in botmux runtime command group. Extract the existing goal-channel runtime setup/doctor/trigger/status/disable registration and dispatch into the nearest focused CLI owner while preserving every public invocation and behavior.

This is a bounded GH-C06 maintainability slice. It follows the earlier registry-admin extraction in #3656 but targets a separate command family and file.

Proposed scope

In scope:

• characterize the current runtime subcommand registration and dispatch behavior;
• move the cohesive runtime registration/dispatch group into a focused owner module;
• update the active call site and remove the old branch rather than retaining a compatibility wrapper without a real external import contract;
• preserve public CLI names, arguments, output, receipts, and error behavior;
• keep Goal Channel as the existing capability owner and botmux runtime as the existing built-in/internal route;
• retain focused regression coverage for botmux runtime, Lark Goal Channel, and CLI module ownership.

Out of scope:

• runtime behavior or receipt-semantic changes;
• provider lifecycle or Lark routing changes;
• new CLI options, capabilities, providers, or generic abstractions;
• unrelated cleanup in adjacent command families.

Intended base branch

main

Relevant files or commands

• loopx/cli_commands/goal_channel.py
• proposed focused owner: loopx/cli_commands/goal_channel_runtime.py
• tests/control_plane/test_botmux_goal_channel_runtime.py
• tests/extensions/test_lark_goal_channel.py
• regression/cli-command-module-contract.py

Validation plan

• python3 -m pytest -q tests/control_plane/test_botmux_goal_channel_runtime.py tests/extensions/test_lark_goal_channel.py
• python3 regression/cli-command-module-contract.py
• python3 -m py_compile loopx/cli_commands/goal_channel.py loopx/cli_commands/goal_channel_runtime.py
• loopx canary premerge --from-git-diff
• loopx check --scan-path loopx/cli_commands/goal_channel.py --scan-path loopx/cli_commands/goal_channel_runtime.py --scan-path tests/control_plane/test_botmux_goal_channel_runtime.py --scan-path tests/extensions/test_lark_goal_channel.py

Public/private boundary

• This issue does not include private benchmark traces, verifier output, credentials, internal document links, raw agent sessions, or local runtime state.
• I will not run or duplicate maintainer-owned benchmark cases unless a maintainer explicitly splits out a public task.

I would like to work on this focused slice. Please mark it claimed or suggest a smaller boundary before implementation.