Sub-agents
Dispatch agents in parallel, then watch and steer them live.
Workflows
A small script that runs helper agents over a list of items and combines what comes back.
Agent mode
A lean coding agent on the same engine, without the five steps.
Goals
A loop that runs until the goal lands, blocks, or spends its budget.
Monitor
A background watch on a long command, streamed as notifications.
Trace viewer
/trace — a read-only walk through your session logs.Prime
An agent loop whose only tool is code it writes and runs. Experimental.
Project context
AGENTS.md / CLAUDE.md, loaded into every agent’s prompt.MCP servers
Connect your own MCP servers. Their tools reach the model directly.
Move a session to the cloud
/cloud runs the session’s turns in a cloud sandbox while you keep the local screen.Headless runs
helix -p "…" runs one prompt, prints the reply and exits. For scripts, CI and other agents.Session commands
The slash commands that drive a running session.
How the loop works
The five lifecycle stages these capabilities serve — and the two rules that keep the loop honest.