Reference / Primitives

Five operations. Ordinary code around them.

Yield owns the boundaries between your program, commands, the coding agent, and people. Your language provides the branches, loops, functions, and types.

01 / Choose

Use the boundary that owns the work.

RunCommand

Run a real command

Use its exit code and output as recorded evidence.

AgentTask

Ask for judgment

Give interpretation to the coding agent and request structured data.

AskUser

Wait for a person

Pause for a choice, missing fact, or approval.

Require

Enforce a claim

Stop before later work when a required condition fails.

Outcomes

End honestly

Complete, block, or refuse with a recorded result or reason.

02 / Owner

Each operation has one clear owner.

Yield CLI

Runs commands and records their real output.

Coding agent

Performs model tasks and presents user questions.

Skill workflow

Checks requirements and selects a terminal outcome.

Your language

Provides normal control flow around these boundaries.