# E3.M5 — EconomyBalancePolicy

## Summary

| Field | Value |
|--------|--------|
| **Module ID** | E3.M5 |
| **Epic** | [Epic 3 — Crafting Economy](../epics/epic_03_crafting_economy.md) |
| **Stage target** | Pre-production |
| **Status** | Planned (see [dependency register](module_dependency_register.md)) |

## Purpose

Faucet/sink parameter sets and guardrails for inflation/deflation; feeds alerts via [E9.M2](E9_M2_KpiDashboardsAndAlerting.md).

## Responsibilities

- Encode `EconomyPolicy`, `PriceBandRule`, `FaucetSinkRatio` thresholds; integrate with [E3.M4](E3_M4_SinkAndDurabilityLifecycle.md) sinks.

## Key contracts

| Contract | Role |
|----------|------|
| `EconomyPolicy` | Named tunable bundles. |
| `PriceBandRule` | Listing/fee bands for [E8.M3](E8_M3_PlayerTradeAndMarketplace.md). |
| `FaucetSinkRatio` | KPI targets and breach signals. |

## Module dependencies

- **E3.M4** — SinkAndDurabilityLifecycle.
- **E9.M2** — KpiDashboardsAndAlerting.

## Dependents (by design)

- **E8.M3** — marketplace fees and validation.
- **E9.M3** — LiveBalanceControlPlane.

## Related implementation slices

Epic 3 **Slice 4** — policy alerts on ratio breaches.

## Source anchors

- Master plan: [`neon_sprawl_vision.plan.md`](../../../neon_sprawl_vision.plan.md) — Epic 3.
- [Module dependency register](module_dependency_register.md)