Claude Agent SDK build harness with a Planner/Builder/Evaluator loop. Owns subagent topology, tool-budget design, harness loop shapes, and agent evaluation. Use for /oc-agent, "Claude Agent SDK", "build an agent", "subagent", "tool budget", "agent loop", "harness", "multi-agent", "agent eval", "orchestrator-worker". Model routing comes from oc-claude-api; agent-forge owns topology + harness shape.
