Context

Follow-up from #26 which implemented the core 3 strategies (manual, role-based, load-balanced). The remaining strategies from DESIGN_SPEC §6.4 are stretch goals that extend the TaskAssignmentStrategy protocol.

Acceptance Criteria

Strategies

• Cost-optimized — assign to cheapest capable agent (consider AgentWorkload.total_cost_usd + provider cost tiers)
• Hierarchical — follow management chain for delegation (integrate with HierarchyResolver)
• Auction — agents bid on tasks (from DESIGN_SPEC §6.4 table)

Infrastructure

• Register new strategies in STRATEGY_MAP
• Unit tests for each new strategy
• Update DESIGN_SPEC §6.4 "Current state" annotation

Dependencies

• Depends on Implement task assignment strategies (role-based, load-balanced, manual) #26 (task assignment subsystem — implemented)

Design Spec Reference

• Section 6.4 — Task Assignment Strategies (Auction, Hierarchical, Cost-optimized rows)