Implement the work described by the user in the spec or tickets.

The main agent is the orchestrator. It owns the preflight, branch and worktree state, integration, validation, independent review, and delivery. An implementer subagent owns the code for one ticket in one isolated context.

Process

1. Pin the work

Read the complete ticket or spec, identify its acceptance criteria and pre-agreed test seams, and choose the delivery mode below. Record the fixed point for review: the immediate parent branch for a stack, the integration branch for a child ticket, or the trunk/explicit parent for standalone work. If the seams are not settled, ask the user before dispatching implementation.

This step is complete when the scope, seams, blockers, fixed point, target branch, and target worktree are all explicit.