# V5 — Features (Page Index)

This directory holds the V5 (a UE5 open-world narrative universe of six "ruleset
cells") feature map, decomposed from the single
[`../V5_features.md`](../V5_features.md) hub into focused, in-depth,
code-grounded pages. The hub remains the canonical entry point and preserves
every section heading; each page below expands one part of the product with
richer, code-grounded detail and an honest implemented / spec-only status. The
companion architecture reference lives in
[`../architecture/`](../architecture/README.md).

> **Cross-reference convention.** Page-to-page links are relative
> (`./<slug>.md`); the architecture companion for a feature page is linked as
> `../architecture/<slug>.md`. Platform-foundation links point at the shared
> [`platform/`](../../platform/overview.html) space.

## Feature landscape

```mermaid
flowchart TB
  Promise[V5 six-cell open-world narrative promise] --> Cells[Ruleset cells]
  Cells --> Urban[Urban crime]
  Cells --> Period[Period drama]
  Cells --> Frontier[Frontier]
  Cells --> Hunter[Monster hunter]
  Cells --> Squad[Galactic squad]
  Cells --> Vacuum[Hard vacuum]
  Urban --> Shared[Shared gameplay world narrative and presentation]
  Period --> Shared
  Frontier --> Shared
  Hunter --> Shared
  Squad --> Shared
  Vacuum --> Shared
  Shared --> Mind[Mind Palace evidence deduction and authored cases]
  Shared --> Product[Modes multiplayer creator workshop online and live service]
  Mind --> Platform[Accessibility localization rights production world and launch]
  Product --> Platform
```

The landscape separates the six-cell product scope from shared foundations and
from actual implementation maturity. Each cell owns distinct movement, combat,
world, narrative, and content rules; Mind Palace and platform services compose
them through versioned contracts.

Use this index to choose the player/cell/cross-cell promise, then pair it with
the closest [architecture page](../architecture/README.md). Follow authored
truth and rights through runtime, authority, persistence, presentation,
services, and evidence. Finally check backlog, dependencies, product review,
current corpus/assets/code/tests/builds, and release/operational evidence before
assigning a completion state. A plugin shell, research note, fixture case, or
shared base class does not prove a supported cell.

Every focused feature page appears exactly once below. The
[V5 documentation guide](../docs/README.md) explains the six-cell truth model
and role paths; the [diagram atlas](../docs/diagram-atlas.md) provides case,
data, state, module, production, and release models. Cross-links preserve
relationships without duplicating canonical ownership.

## Orientation

- [Product Promise](./product-promise.md) — what V5 commits to as a multi-cell
  open-world narrative universe.
- [Subsystem Glossary](./subsystem-glossary.md) — every V5 subsystem mapped to
  code.
- [The Ruleset Cells: Overview](./ruleset-cells-overview.md) — the ruleset-cell
  model and a tour of the six cells.

## The Six Ruleset Cells

- [The Urban-Crime Cell](./urban-crime-cell.md) — the open-world crime cell (the
  bureau/investigation spine, heists).
- [The Period-Drama Cell](./period-drama-cell.md) — the historical open-world
  cell.
- [The Frontier Cell](./frontier-cell.md) — the western/survival cell.
- [The Monster-Hunter Cell](./monster-hunter-cell.md) — the hunting/alchemy
  cell.
- [The Sci-Fi Galactic-Squad Cell](./scifi-galactic-squad.md) — the squad-RPG
  sci-fi cell.
- [The Sci-Fi Hard-Vacuum Cell](./scifi-hard-vacuum.md) — the realistic-space
  (Newtonian) sci-fi cell.

## Cross-Cell Systems

- [The Mind Palace](./mind-palace.md) — the detective deduction/evidence-board
  system.
- [Shared Cross-Cell Systems](./shared-cross-cell-systems.md) — the morality,
  combat, and open-world systems every cell shares.

## Modes, Online Services & Live Operations

- [Modes & Multiplayer](./modes-and-multiplayer.md) — the game modes and
  multiplayer experience.
- [Content, Creator Tools & Workshop](./content-creator-tools-and-workshop.md) —
  case authoring, creator tools, and the community workshop.
- [Online Services & Infrastructure](./online-services-and-infrastructure.md) —
  the online services and backend infrastructure.
- [Live Service & Community](./live-service-and-community.md) — the live-service
  programming and community features.

## Platform, Compliance & Production

- [Platform, Performance & Tech](./platform-performance-and-tech.md) — platform
  support, performance, and technical features.
- [Accessibility, Localization & Compliance](./accessibility-localization-and-compliance.md)
  — accessibility, localization, and compliance.
- [Production, Progression, World & Launch](./production-progression-world-and-launch.md)
  — production, progression, the open world, and launch readiness.