Dock

{
  "controls": [
    {
      "id": "git",
      "title": "Git",
      "command": "lazygit",
      "height": 300
    },
    {
      "id": "logs",
      "title": "Logs",
      "command": "tail -f ./logs/development.log",
      "cwd": "."
    },
    {
      "id": "feed",
      "title": "Feed",
      "command": "cmux feed tui --opentui",
      "height": 320
    }
  ]
}

Set up cmux Dock controls for the current context.

First, learn the feature before editing:
1. Run `cmux docs dock` if the cmux CLI is available. If it is not, read https://cmux.com/docs/dock.
2. Inspect the repository or current directory to understand the project type, scripts, package manager, dev servers, logs, task runners, test commands, and any existing TUI tools.
3. If the desired Dock is ambiguous, ask the user what they want monitored or controlled before writing files.

Dock is cmux's right-sidebar terminal control area. A Dock config is JSON with a top-level `controls` array. Each control runs a command in its own Ghostty-backed terminal section using the user's login shell. Controls are useful for project dashboards, git/status views, dev server or build status, test watchers, log tails, queues, local services, or a custom TUI such as `cmux feed tui --opentui` when that feed is useful.

Choose where to write the config:
- In a repository or project directory, create or edit `.cmux/dock.json` so teammates can share it.
- For a personal default outside a repo, create or edit `~/.config/cmux/dock.json`.
- If both exist, project `.cmux/dock.json` is more specific for that project. Nested project configs apply to that directory tree; use the nearest relevant project config instead of writing unrelated controls globally.
- If there is no repo and no clear project root, use the global config only after confirming the user wants a personal Dock.

Schema:
{
  "controls": [
    {
      "id": "short-stable-id",
      "title": "Human label",
      "command": "safe command to run",
      "cwd": "optional/path",
      "height": 220,
      "env": { "NAME": "value" }
    }
  ]
}

Rules:
- Keep ids stable, lowercase, and unique.
- Use `cwd` for subdirectories; relative paths resolve from the config base.
- Use `height` only when a control needs a fixed amount of vertical space.
- Use `env` only for non-secret values needed by one control.
- Do not put secrets, tokens, or machine-specific private paths in a shared project config.
- Prefer commands that are safe to start repeatedly and make sense in a terminal.
- Do not invent unavailable scripts. Read package files, Makefiles, Procfiles, README docs, config files, and existing tooling first.
- Keep shared project Docks portable for teammates. Put personal or machine-specific controls in the global Dock.

Deliverable:
- Create or update the appropriate dock.json.
- Preserve existing useful controls unless the user asked to replace them.
- Validate that the JSON parses.
- Summarize what each control does and any commands the user should review before trusting the Dock config.