Hello World

The simplest arpi worker — spawns, completes a task, and exits.

Template

Save as hello-world.toml:

template_version = "1.0"

[worker]
name = "hello-world"

[workstation]
model = "claude-sonnet-4-20250514"
task = "Say hello and explain what arpi workers are in 3 sentences."

[workstation.capabilities]
mcps = []

Usage

arpi spawn hello-world.toml

What happens

1. Create — arpi creates the worker record and transitions to Pending
2. Provision — Resources are allocated, worker moves to Spawned
3. Execute — The model receives the task, generates a response, and records it as a trajectory
4. Complete — Worker transitions to Completed

View the trajectory

arpi trajectory <worker-id>

The trajectory contains the full conversation: the task prompt, the model’s response, token counts, duration, and cost.

You can also view it in the web dashboard at Space > Track.