# E2.M3 — MasteryAndPerkUnlocks

## Summary

| Field | Value |
|--------|--------|
| **Module ID** | E2.M3 |
| **Epic** | [Epic 2 — Skills and Progression Framework](../epics/epic_02_skills_and_progression.md) |
| **Stage target** | Pre-production |
| **Status** | Planned (see [dependency register](module_dependency_register.md)) |

## Purpose

Mastery tracks and perk unlock state so **skill** builds have expressive identity beyond raw level curves.

## Responsibilities

- Progress `MasteryTrack` data; emit `PerkUnlockEvent` and persist `PerkState`.

## Key contracts

| Contract | Role |
|----------|------|
| `MasteryTrack` | Branch progress per design. |
| `PerkUnlockEvent` | Unlocks for UI and combat/craft hooks. |
| `PerkState` | Current unlocked perks per character. |

## Module dependencies

- **E2.M2** — XpAwardAndLevelEngine.

## Dependents (by design)

- Gameplay systems that gate abilities or recipes on perks (integration per content).

## Related implementation slices

Epic 2 **Slice 4** — at least one mastery path unlocks a perk without blocking other skills.

## Source anchors

- Master plan: [`neon_sprawl_vision.plan.md`](../../../neon_sprawl_vision.plan.md) — Epic 2.
- [Module dependency register](module_dependency_register.md)