PowerX (ops) - Model Cost & Quota Governance

Usecase Overview

• Business Goal: Real-time visibility into model call costs, quotas, and health signals, detecting anomalies within 5 minutes and automatically executing throttling/degradation to ensure budget and compliance.
• Success Metrics: Cost data latency <1 minute; quota exceeded alerts delivered <5 minutes; throttling/shutdown actions 100% audited; automatic recovery <15 minutes; reports covering all tenants.
• Scenario Linkage: Integrates with SCN-AGENT-MODEL-GOV-001 Stage (Model Cost & Quota Governance), outputs cost/quota signals to routing and execution scenarios, and depends on Provider and routing usecases for capability and health data.

Summary: Through the closed loop of "metering → cost aggregation → quota comparison → alerts/automated runbook → reports/audit", achieves FinOps governance of model capabilities.

Context & Assumptions

• Prerequisites
  • All model calls carry trace_id, tenant_id, provider_id, invocation_type, written to execution logs or event streams.
  • Cost Warehouse (or Lakehouse) can receive streaming metering data; Quota Service supports multi-dimensional configuration for tenant/project/environment.
  • Feature Flags provider-cost-guard, quota-enforcer registered in config center, can be staged by tenant.
  • docs/_data/docmap.yaml usecase node fields are fully consistent with this Seed.
• Inputs
  • Execution Logs, agent.provider.* metrics, Provider cost rate tables, tenant quota configurations, upper limits/alert thresholds.
  • Ops input for budget cycles, whitelist/exemption, degradation strategies.
• Outputs
  • Cost/quota metrics, agent.provider.cost_total, agent.provider.quota_usage monitoring data.
  • Anomaly events agent.provider.cost.anomaly, alert notifications, automated runbook execution results.
  • Cost reports (tenant/provider/capability dimension), audit logs, degradation receipts.
• Boundaries
  • Does not include financial settlement, contract negotiation, and pricing strategy.
  • Does not directly modify call paths, only issues throttling/shutdown instructions or Feature Flags.
  • Not responsible for Provider onboarding/routing strategies, only consumes their outputs.

Solution Blueprint

System Decomposition

Layer	Main Components/Modules	Responsibilities	Code Entry Points
ops	Cost Metering Pipeline	Aggregate Token/call metrics, calculate real-time cost and write to warehouse	services/cost/metering.ts
ops	Quota & Enforcement Service	Maintain quota tables, execute throttling/shutdown, whitelist management	services/quota/enforcer.go
ops	Cost Guard & Alerting	Detect anomaly trends, push provider-cost-guard alerts, trigger runbook	services/observability/model_cost_dashboard.ts
ops	Reporting & Audit Layer	Generate reports, output to FinOps/Ops, record operation audit	scripts/qa/provider-drill.mjs, services/audit/model_cost_audit.go

Process & Sequence

1. Step 1 – Metering Intake: Execution Logs -> Cost Metering, calculate real-time cost per provider_rates.yaml and tag with tenant/project.
2. Step 2 – Quota Comparison: Quota Service compares cost/usage with model_usage.yaml quotas, generating utilization rates and remaining quotas.
3. Step 3 – Anomaly Detection: Cost Guard evaluates month-over-month/year-over-year, spikes, budget consumption, triggers agent.provider.cost.anomaly event and alerts when exceeding thresholds.
4. Step 4 – Enforcement & Degrade: quota-enforcer calls throttling/shutdown APIs or pushes Feature Flags per policy, executes scripts/ops/quota-degrade.mjs when necessary.
5. Step 5 – Reporting & Audit: Generate daily/weekly reports, sync to FinOps dashboard, write all throttling/recovery operations to audit.

Contracts & Interfaces

• Inbound APIs / Events
  • POST /internal/provider-usage/report — Write metering data; supports batch/streaming mode.
  • POST /internal/provider-cost/anomaly — Manual anomaly reporting or FinOps data; generates audit.
  • POST /internal/provider-quotas/enforce — Execute throttling, degradation, shutdown operations, requires quota.enforcer permission.
  • EVENT agent.provider.cost.anomaly — Automatic alert event (carrying tenant, provider, weights, recommended actions).
• Outbound Calls
  • GET /internal/provider-quotas — Query latest quotas/whitelists.
  • POST /internal/feature-flags/{flag}/toggle — Enable/disable provider-cost-guard, quota-enforcer.
  • Telemetry agent.provider.* — Output cost, quota, degradation metrics.
  • Ops Pager / ChatOps — Publish alerts, runbook links.
• Configuration & Scripts
  • config/cost/provider_rates.yaml, config/quotas/model_usage.yaml — Rates and quotas.
  • scripts/qa/provider-drill.mjs — Stress test/simulate cost spikes.
  • scripts/ops/quota-degrade.mjs — Automated degradation/recovery operations.

Implementation Checklist

Item	Description	Completion Status	Owner
Streaming Metering & Aggregation	Connect execution logs, real-time Token/cost calculation, write to warehouse	[ ]	Ops Reliability Center
Rates & Budget Configuration	Maintain provider_rates.yaml, support multi-currency/discounts	[ ]	FinOps Taskforce
Quota & Whitelist Management	model_usage.yaml model, interface, tenant multi-dimensional quotas	[ ]	Agent Platform Guild
Anomaly Detection & Alerting	Metric thresholds, trend analysis, agent.provider.cost.anomaly events	[ ]	Ops Reliability Center
Throttling/Degradation Runbook	quota-enforcer API, scripts and audit	[ ]	Ops Reliability Center
Reporting & Visualization	Grafana/Datadog panels, periodic report exports	[ ]	FinOps Taskforce

Testing Strategy

• Unit Tests: Cost calculation functions, rate mapping, quota comparison, threshold decision.
• Integration Tests: Simulate real calls to write provider-usage/report, verify cost aggregation, quota APIs, alert events.
• End-to-End: Use scripts/qa/provider-drill.mjs in sandbox to create spike traffic, observe alert → throttling → recovery full链路.
• Chaos / Failover: Inject metering delay, Quota Service unavailable, Telemetry loss, confirm degradation strategy and compensation (e.g., cached quotas, manual review).

Observability & Ops

• Metrics: agent.provider.cost_total, agent.provider.cost_delta_percent, agent.provider.quota_usage, agent.provider.alert_total, agent.provider.degrade_total, agent.provider.cost_latency_ms.
• Logs: Metering intake logs, quota decision logs, throttling/shutdown operation logs (including tenant, provider, policy_version), audit streams.
• Alerts: Cost spikes >20%/5min, quota usage rate ≥90%, degradation execution failure, metering delay >60s, report generation failure.
• Dashboards: Grafana「Model Cost & Quota」, Datadog agent.provider.*, FinOps monthly reports.

Rollback & Failure Handling

• Quota/rate configuration supports versioning, anomalous releases can be reverted via Git + npm run publish:usecases -- --scn-id SCN-AGENT-MODEL-HUB-001 --validate-only for verification.
• quota-enforcer provides POST /internal/provider-quotas/enforce/undo API to rollback mistaken throttling.
• When metering pipeline异常, automatically switch to batch backfill mode and mark data quality.
• When alert/runbook failures, immediately escalate to manual on-call, output audit records for tracking.

Follow-ups & Risks

Risk/Item	Impact	Mitigation Plan	Owner	ETA
Cost data source delay or missing	Budget cannot be monitored in real-time	Introduce Kafka replay + data quality monitoring, establish SLA alerts	Ops Reliability Center	2025-03-05
Inconsistent quota configuration	Mis-throttling or privilege escalation	Establish approval workflow, auto-validation scripts, dual-person review	Agent Platform Guild	2025-03-01
Disconnect between reports and financial systems	Cannot support settlement/budget meetings	Integrate with FinOps DataMart, export standardized CSV/Looker views	FinOps Taskforce	2025-03-12

References & Links

• Scenario: docs/scenarios/agent-orchestration/SCN-AGENT-MODEL-GOV-001.md
• Docmap: docs/_data/docmap.yaml (SCN-AGENT-MODEL-HUB-001 -> UC-AGENT-MODEL-GOV-001)
• Repo Metadata: docs/_data/repos.yaml (key: powerx)
• Configuration: config/cost/provider_rates.yaml, config/quotas/model_usage.yaml
• Tools: scripts/qa/provider-drill.mjs, scripts/ops/quota-degrade.mjs