implement-phases

Phased coordination analyzes your plan document to identify dependencies between phases, then determines whether each phase runs in parallel or sequentially. Sub-agents execute each phase independently, and results aggregate into a final structured report, allowing you to orchestrate complex multi-phase projects without manual sequencing.

Parse your plan document to extract distinct phases with explicit scope and acceptance criteria. The Skill detects both explicit dependencies (phase B requires phase A) and implicit ones (shared resources, timing constraints), then spawns a sub-agent per phase to handle implementation while the coordinator manages handoffs and failure isolation.

Execution strategy adapts to your dependencies. Independent phases run in parallel for speed; dependent phases run sequentially. The Skill analyzes your plan to choose the optimal strategy automatically, and sub-agents execute concurrently or in order accordingly, with isolated failure handling so one phase's failure doesn't block others.

Failure handling detects and isolates phase failures without cascading to dependent phases or the overall workflow. When a phase fails, the coordinator reports the failure, preserves results from completed phases, and optionally retries or halts based on dependency criticality, giving you fine-grained control over fault tolerance.

Prepare a plan document that specifies phases, their scope, acceptance criteria, and any explicit dependencies or execution constraints. The Skill extracts phases from this document and handles dependency detection and execution strategy internally, so you provide only the plan; sub-agent spawning and aggregation are automatic.

After all sub-agents complete their phases, the coordinator collects structured results from each phase—outputs, artifacts, and status—and assembles them into a final report. Results preserve phase execution order and dependency chain, letting you trace outcomes back to their source phase and verify acceptance criteria across the full workflow.