Kiro

T3 Code runs the Kiro CLI as an agent, using your own Kiro account, custom agents, steering, hooks, and MCP configuration.

Set Up Kiro

1. Install the Kiro CLI on the machine running the T3 Code server. On macOS or Linux, run curl -fsSL https://cli.kiro.dev/install | bash. On Windows 11, run irm 'https://cli.kiro.dev/install.ps1' | iex in PowerShell. Kiro's installation guide lists other options.
2. Run kiro-cli login once in a terminal. Kiro Pro and higher plans can instead set an API key as KIRO_API_KEY in the Kiro provider's environment variables.
3. Open Settings → Providers, enable Kiro, and refresh it.

If kiro-cli is not on the server's PATH, set its Binary path. On macOS and Linux, the installer usually puts it in ~/.local/bin. T3 Code starts Kiro's CLI V3 engine, so a Kiro CLI that cannot run V3 will not start.

Models

The model picker lists the models your Kiro account can use once Kiro is signed in. New threads start on your Kiro default model: auto, which lets Kiro choose, unless your account or organization sets another. A model your account cannot use stops the turn with an error instead of running on another model.

Models with adjustable reasoning effort, such as recent Claude Opus and Sonnet models and GPT-5.6, show a Reasoning setting with only the levels Kiro offers for that model. Your default model and models without effort control run at Kiro's own setting.

Agents

The Agent setting next to the model picks the Kiro agent a thread runs as: Kiro's built-in agents such as Spec and Plan, and your own agents in ~/.kiro/agents. Agents in a project's .kiro/agents are not listed yet. Refresh the Kiro provider after adding or removing an agent.

The thread's model still applies when an agent sets its own model. An agent that was removed leaves the thread on Kiro's current agent.

Permission Modes

Kiro asks before tool calls such as writes and commands, and T3 Code answers by the permission mode:

• Supervised sends those requests to you. Kiro's Autopilot is off, so Kiro also asks you to review the turn's file changes before it finishes.
• Full access approves them without asking you. Autopilot stays on, so there is no review step.

Kiro offers no Auto or Auto-accept edits. Approvals offer only the choices Kiro sends. Kiro's Always allow saves a rule for the whole workspace, so T3 Code shows it only when Kiro offers no one-time choice.

Steering, Forks and Compaction

• A message you send while Kiro is working joins the running turn. Kiro reads it once its current step or tool call finishes. A message with images stops the turn and starts a new one with it.
• Forking a thread from a message gives the fork Kiro's own copy of the conversation up to that message.
• /compact uses Kiro's own compaction. Kiro also compacts on its own as the conversation fills its context.