# Claude Code Game Studios — Ajedrez Purgatorio

Narrative chess game set in purgatory. Tactical gameplay with emotional piece identity,
dice risk/reward mechanics, and async Dead Kings social system.

## Technology Stack

- **Engine**: Unity 6.3 LTS (6000.3.13f1)
- **Language**: C#
- **Render Pipeline**: URP 2D (17.3.0)
- **UI**: UGUI + TextMeshPro
- **Version Control**: Git with trunk-based development
- **Target Platform**: PC (expandable to mobile)

## Project Structure

@.claude/docs/directory-structure.md

## Engine Version Reference

@docs/engine-reference/unity/VERSION.md

## Technical Preferences

@.claude/docs/technical-preferences.md

## Coordination Rules

@.claude/docs/coordination-rules.md

## Collaboration Protocol

**User-driven collaboration, not autonomous execution.**
Every task follows: **Question -> Options -> Decision -> Draft -> Approval**

- Agents MUST ask "May I write this to [filepath]?" before using Write/Edit tools
- Agents MUST show drafts or summaries before requesting approval
- Multi-file changes require explicit approval for the full changeset
- No commits without user instruction

See `docs/COLLABORATIVE-DESIGN-PRINCIPLE.md` for full protocol and examples.

> **First session?** If the project has no engine configured and no game concept,
> run `/start` to begin the guided onboarding flow.

## Coding Standards

@.claude/docs/coding-standards.md

## Context Management

@.claude/docs/context-management.md

## Current State (Aug 2026)

### Critical Bugs Fixed
- **StackOverflow** — `CheckDetector.IsInCheck` called `GetAvailableMoves()` on enemy King, which called `GameManager.IsInCheck()` → infinite recursion. Fixed: use `GetAttackSquares()`.
- **Empty board** — `BoardManager.SetupBoard` returned early when CampaignState had no identities. Fixed: fallback to `PlacePieces()`.
- **State stuck in Dialogue** — CampaignManager transitioned to Dialogue before `StartDialogue` returned true. Fixed: only transition on success.
- **DimBG blocking input** — Full-screen overlay with `m_RaycastTarget:1` blocked all clicks. Fixed: deactivated in `PromotionUI.Awake()`.
- **PauseMenuController** — Used non-existent "Pause" input button. Fixed: use `KeyCode.Escape` only.
- **SceneTransitionManager** — Used `Time.deltaTime` with `timeScale=0`. Fixed: `Time.unscaledDeltaTime` + `WaitForSecondsRealtime`.
- **DefeatUI callback race (Aug 25)** — Fade-out disabled the panel before the continue callback coroutine fired. Fixed: invoke callback synchronously in `OnContinueClick`.
- **Dialogues empty on first run (Aug 25)** — `DialogueUI` subscribed only if `DialogueSystem.Instance` existed during its OnEnable (lost Awake race), never retried. Fixed: `[DefaultExecutionOrder(-100)]` on DialogueSystem + resilient deferred subscription.
- **Memorial typing dead (Aug 25)** — Scene TMP_InputFields hollow (`m_TextViewport/m_TextComponent = 0`) AND `InputSystemUIInputModule` doesn't feed legacy `Input.inputString`. Fixed: deep wiring validation + runtime fallback panel + temporary StandaloneInputModule swap (restored in OnDestroy).
- **Pause menu dead (Aug 25)** — Duplicate controllers per scene (one inactive canvas), unusable scene panel, HUD `PauseButton` with empty onClick. Fixed: runtime-built pause panel (Continuar / Reiniciar capítulo / Opciones / Menú principal) + HUD button wired in code + orphan overlay cleanup.
- **Dialogue text over portrait (Aug 25)** — Text box overlapped speaker portrait geometry. Fixed: idempotent runtime relayout in `DialogueUI.OnEnable` (portrait left, text stretched right).
- **CampaignConfig log spam (Aug 25)** — `CreateInstance` fires OnEnable before `SetJsonSource()`. Fixed: OnEnable silent until a JSON source exists.

### Architecture
- **Purgatory mode** (`Mono/`) is main/production codebase
- **Classic mode** (`Mono/Classic/`) is separate simpler mode
- **Board tile size**: 10.24 units, Camera ortho size 45
- **Campaign flow**: MainMenu → CampaignManager.StartCampaign() → Chapter1 scene → SetupBoard → TransitionToChapterIntro → dialogue → TransitionToPlaying
- **Runtime UI fallback pattern**: scene UI panels are validated deeply in code; broken/hollow ones are hidden and rebuilt at runtime (DefeatUI, DeadKingInputUI, PauseMenuController). All runtime canvases: ScaleWithScreenSize reference 1920×1080.
- **Campaigns**: "Nueva Campaña" = Inspector config on scene CampaignManager (`default`, Línea I, 3 chapters); "Gambito de Sombras" = `Resources/Campaigns/gambito_campaign.json` (30 chapters, 4 acts). Same engine/scenes/rules.

### Git History
- `43f15eb` — chore: scene saves from playtesting session (Ch1-3 UI edits)
- `bcc590f` — feat: runtime pause menu + Mi Memorial in main menu
- `97677fb` — fix: defeat→Memorial chain, first-run dialogues, memorial typing, dialogue layout
- `dc45653` — fix: pick best-wired DeadKingInputUI + runtime fallback inscription panel
- `58fcf0f` — feat: draws trigger Purgatory Duel for the Queen + post-defeat restart menu
- `916acd3` — test: raise EditMode coverage to 98.16% global, all classes >=95%
- `351f9e1` — fix: StackOverflow in King.GetAvailableMoves → IsInCheck recursion
- `801de79` — fix: empty board + state stuck in Dialogue

(Older history: `c5915c2`, `0725372`, `bf3bec3`, `b539aa4` initial commit.)