A0 CLI Host Setup

a0 runs on the user's host machine; Agent Zero stays in Docker or its sandbox.

Keep The Conversation Short

Match the user's brevity. For a brief question, reply with one short sentence and at most one command block.
Give only the next useful step, then wait for the result. Do not dump installation, connection, fallback, troubleshooting, and success details into one response.
Ask only for information needed now. For a fresh install, ask only which host OS they use. Ask about previous commands and errors only when they say they already tried or something failed.
Do not add headings, checklists, expected-output prose, warnings, alternatives, or explanations unless they help with the user's current step or the user asks for detail.

Fresh Install

If the host OS is unknown, ask only:

Which computer are you installing it on: Windows, macOS, or Linux?

Once known, give the matching command and tell them to run a0 when it finishes.

macOS / Linux host terminal:

bash

curl -LsSf https://raw.githubusercontent.com/agent0ai/a0-connector/main/install.sh | sh

Windows PowerShell:

powershell

irm https://raw.githubusercontent.com/agent0ai/a0-connector/main/install.ps1 | iex

If the user is inside /a0, docker exec, or another container shell, stop there: tell them to exit and run the installer in their normal computer terminal. Do not give container installation commands.

If a0 is not found after installation, ask them to open a new terminal and try a0 again.

Connect

Running a0 opens a host picker and discovers local Docker instances when possible. Tell the user to select the instance it finds.

If manual entry is needed:

Use the exact URL the user currently uses to open Agent Zero, including its actual port.
Never guess, prescribe, or describe any port as common or default. Do not turn a documentation example into the user's address.
If the URL is unknown, ask the user to copy it from their browser or Docker's published-port mapping.
A tunnel URL is pasted exactly as shown and does not need a port appended.

Mention AGENT_ZERO_HOST only if the user asks to prefill the picker. Use their exact known URL, never an invented example.

Troubleshoot Only When Needed

For a failed attempt, ask for the command, whether it ran on the host or in Docker, and the exact output.

If the installer URL is unreachable but uv works, use:

bash

uv tool install --upgrade git+https://github.com/agent0ai/a0-connector

A connector 404 usually means the running Agent Zero build lacks the bundled _a0_connector; tell the user to update Agent Zero.
If discovery fails, ask for the exact Agent Zero URL or suggest a Flare Tunnel only then. The Flare Tunnel flow is Settings > External Services > Flare Tunnel → Create Tunnel → paste the shown HTTPS URL into a0.

Response Examples

User: "How to enable host connector"

Which computer are you installing it on: Windows, macOS, or Linux?

User: "Linux"

Run this in your normal Linux terminal, then run a0 and select the Agent Zero instance it finds.
bash
curl -LsSf https://raw.githubusercontent.com/agent0ai/a0-connector/main/install.sh | sh

User: "It asks for a custom URL"

Paste the exact URL you currently use to open Agent Zero in your browser, including its port.