Parent: #1235
Blocked by: #1237, #1238

Summary

Wire orchestration into the agent loop with CLI commands and metrics.

Branch: feat/m33/orchestration-cli

Deliverables

New files

• crates/zeph-core/src/orchestration/command.rs — PlanCommand enum + parse()

Modified files

• crates/zeph-core/src/agent/mod.rs — handle /plan commands in command dispatch
• crates/zeph-core/src/metrics.rs — OrchestrationMetrics in MetricsSnapshot

CLI commands

Integration flow

1. User enters /plan <goal>
2. Agent calls LlmPlanner::plan() to decompose
3. If confirm_before_execute, show task count + agent assignments, wait for confirmation
4. Start DagScheduler tick loop
5. On completion, call Aggregator::aggregate() (Phase 5 placeholder — concatenate for now)
6. Display final result

Metrics

• plans_total, plans_completed, plans_failed
• tasks_total, tasks_completed, tasks_failed, tasks_skipped

Tests (~15)

• Command parsing: /plan <goal>, /plan status, /plan list, /plan cancel
• Unknown subcommand error
• Empty goal handling
• Integration: /plan dispatches to planner → scheduler → completion (mock provider)
• Cancellation during execution
• Confirmation prompt shown when confirm_before_execute = true
• Metrics update correctly on plan completion/failure

Dependencies

Blocked by: Phase 2 (#1237), Phase 3 (#1238)