BudgetEnvelope: a Pydantic v2 model declaring max_tokens, max_rounds, max_time_s, and max_cost_usd limits per agent, per session, and per workflow
BudgetTracker: async SQLite ledger that records every token spend, round tick, and elapsed-time delta with nanosecond precision
BudgetEnforcer: an async middleware wrapper that intercepts every AutoGen agent call, checks headroom, and either allows, throttles, or hard-stops execution before tokens are consumed
EconomicsOrchestrator: extends L51’s MasterOrchestrator with pre-flight budget checks, mid-flight spend sampling, and post-flight reconciliation
React Economics Dashboard: live burn-rate sparklines, per-agent radial gauges, projected exhaustion countdowns, and a cost ledger table — all over WebSocket