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:

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

Windows 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:

  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.

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.