Ponytail Claude Code Setup and Commands

A search for “Ponytail Claude” can mean several products. These instructions apply to Claude Code, the coding environment with plugin support. The upstream also documents its use in the Desktop application's Code tab. Ordinary Claude web chat is a different surface: pasting a plugin command there does not install a coding plugin.

Ponytail supplies agent behavior, rather than a different Claude model. It encourages inspection, reuse, and a smaller complete implementation. Your project's requirements, tools, and model still determine what the agent can do. Some upstream features, including the 5.3 band/board functionality, have additional Claude Code version and interface requirements; see the upstream feature notes instead of assuming they work in every Claude interface.

Use a supported Claude Code installation and confirm that its plugin interface is available. The upstream requires Node to be discoverable in the host's noninteractive environment. A terminal that can find Node does not necessarily prove that a desktop-launched process can find it.

Before installation, record existing Claude Code plugins and project instructions, including CLAUDE.md. Keep a recoverable copy of files you will change. Decide whether the installation belongs to you, the project, or a local project configuration; use the host's scope controls when a scope other than the default is intended. The Claude Code plugin documentation explains host behavior.

Begin in a disposable project containing a small, understandable task. Do not use a production incident as your first activation check. Our source reference is Ponytail 5.3.2 at commit 09c434a; installation behavior also depends on the Claude Code version you run.

Inside Claude Code, send:

/plugin marketplace add DietrichGebert/ponytail

Wait for that operation to finish, then send:

/plugin install ponytail@ponytail

These are Claude Code commands, not shell commands. Read the reported source and scope before accepting prompts. Keep any existing project guidance: installing Ponytail is not a reason to erase established build, testing, security, or style instructions.

Reload when the host requests it and open a fresh session. Consult the fixed-version Ponytail instructions for Claude Code if the displayed interface differs. A source-supported command is not a guarantee that your installed host version has the same capabilities. These marketplace commands do not promise an immutable 5.3.2 installation; check the installed version and source after running them.

On macOS with Claude Code 2.1.227, an isolated CLI configuration installed the plugin, listed it as enabled at 5.3.2, checked for an update at the same source version, and removed it successfully. The installed source files matched the fixed reference. This checked the terminal management flow, not the two in-chat commands above.

We did not start an authenticated Claude Code session, execute the lifecycle hooks, inspect the live skill menu, or test level switching. Desktop Code behavior and band modules were not tested. The following steps describe what to verify in your environment; they are not a claim that our end-to-end activation check passed.

1. Open the plugin interface and confirm Ponytail appears as installed in the intended scope.
2. Begin a new session after any required reload. Check that the Ponytail command or skill is discoverable.
3. Ask for a small change in a test repository that already contains a useful helper. Require preservation of behavior, boundary checks, and existing tests.
4. Inspect the proposed files and diff. Confirm that the agent considered reuse rather than adding an unrelated framework or abstraction.
5. Run the project's relevant checks. Record failures instead of treating fewer changed lines as success.

The behavior check is an observation, not proof of permanent compliance. If a task requires a new abstraction, explicitly state why. Ponytail's minimal-change guidance should help meet the task, not remove a needed design constraint.

With a plugin path that exposes the documented commands, use a session level such as:

/ponytail lite

The documented levels are lite, full, and ultra, plus off. Full is the default. An ordinary session switch is distinct from changing the default for future sessions; the shared configuration paths are in the defaults guide.

The upstream command set also includes /ponytail-review for changes, /ponytail-audit for a broader audit, /ponytail-debt for deferred work, /ponytail-gain for the author's benchmark scoreboard, and /ponytail-help for help. The gain command does not independently measure savings in your current project. Use the upstream command reference for the checked release, and review any suggested edits before applying them.

To request an update from a system terminal, the host documents:

claude plugin update ponytail@ponytail

You can also use the plugin interface: Installed → Ponytail → Update now. Follow reload instructions and repeat the fresh-session check. Do not assume a third-party marketplace has automatic updates enabled.

For removal, the upstream lists /plugin remove ponytail. The Claude Code CLI also documents:

claude plugin uninstall ponytail@ponytail

Use the same scope as the original installation; the host's project or local scope flags matter when those scopes were used. Removing a user-scoped plugin does not necessarily undo a project-scoped registration. Restore only instructions you changed, reload, and confirm the plugin no longer loads.

Sources: upstream removal notes and Claude Code plugin management. The upstream's separate full state-cleanup script may change shared defaults and other integrations; inspect its documented scope before using it. Turning Ponytail off is a session behavior control, not a removal operation.

When the marketplace is unavailable, confirm the repository spelling and the host's network access. When installation succeeds but commands do not appear, inspect plugin scope, reload, and start a new session. When a hook cannot run, inspect the actual error and Node visibility in the environment used by Claude Code.

If the plugin loads but the output ignores your constraints, narrow the task and resolve conflicting instructions. Include explicit acceptance criteria and inspect the changes yourself. The limitations guide separates setup failures from the risks of a correctly loaded coding instruction set.