These agents are invoked by other agents (orchestrator), not directly by user:
- history-miner: invoked by orchestrator during [planned] phase
- system-analyst: invoked by orchestrator during [researching] phase
- prompt-optimizer: invoked by evaluator when score < 7
- product-owner: invoked by evaluator for process improvements
- agent-architect: invoked by capability-analyst when gaps identified
- browser-automation: invoked by orchestrator for E2E testing
- visual-tester: invoked by orchestrator for visual regression
Mode 'all' should be used only for agents that can be both
primary (user-facing) and subagent (invoked by other agents).
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