---
phase: 01-level-up-pf2e-regelkonform
plan: 04
type: execute
wave: 3
depends_on: ["01-01", "01-02", "01-03"]
files_modified:
  - server/src/modules/leveling/leveling.module.ts
  - server/src/modules/leveling/leveling.controller.ts
  - server/src/modules/leveling/leveling.service.ts
  - server/src/modules/leveling/feat-filter.service.ts
  - server/src/modules/leveling/dto/start-level-up.dto.ts
  - server/src/modules/leveling/dto/patch-level-up.dto.ts
  - server/src/modules/leveling/dto/commit-level-up.dto.ts
  - server/src/modules/leveling/dto/level-up-state.dto.ts
  - server/src/modules/leveling/dto/index.ts
  - server/src/modules/leveling/leveling.service.spec.ts
  - server/src/modules/leveling/feat-filter.service.spec.ts
  - server/src/modules/characters/characters.gateway.ts
  - server/src/modules/characters/pathbuilder-import.service.ts
  - server/src/app.module.ts
autonomous: true
requirements: [LVL-03, LVL-04, LVL-05, LVL-07, LVL-09, LVL-10, LVL-11, LVL-12, LVL-13, LVL-14, LVL-15]
tags: [nestjs, rest-api, websocket, transaction, level-up, server, integration-tests]
must_haves:
  truths:
    - "POST /characters/:characterId/level-up creates or resumes a single open LevelUpSession DRAFT for the character (Owner OR GM access)."
    - "PATCH /characters/:characterId/level-up/:sessionId merges a partial state into the DRAFT and validates the shape via class-validator + a TS guard."
    - "GET /characters/:characterId/level-up/:sessionId/preview returns Vorher/Nachher DerivedStats computed via recompute-derived-stats.ts (no commit)."
    - "POST /characters/:characterId/level-up/:sessionId/commit runs an atomic prisma.$transaction that: inserts LevelUpHistory snapshot, updates Character (level + hpMax + freeArchetype), upserts CharacterAbility/CharacterSkill/CharacterFeat/CharacterResource/CharacterSpell rows, marks the session committedAt = now, then emits ONE 'level_up_committed' WebSocket event."
    - "DELETE /characters/:characterId/level-up/:sessionId removes the DRAFT (LevelUpSession row) without touching the Character."
    - "feat-filter.service returns only feats whose prereqs evaluate {ok:true} or {unknown:true} per slot/source filter, never {ok:false}."
    - "PathbuilderImportService runs the prereq evaluator after import and persists violations to Character.prereqViolations + auto-detects FA from feat tuples."
    - "characters.gateway.ts CharacterUpdatePayload union includes 'level_up_committed' and the broadcast happens once per commit (Pitfall #9)."
    - "Commit transaction NEVER mutates Character.hpCurrent (Pitfall #9 — verified by integration test)."
    - "Race-condition: second simultaneous commit on the same session is rejected by the partial unique index (verified by integration test)."
  artifacts:
    - path: "server/src/modules/leveling/leveling.module.ts"
      provides: "NestJS module wiring controller + services + JWT + dependency on CharactersModule (for gateway)"
      exports: ["LevelingModule"]
    - path: "server/src/modules/leveling/leveling.controller.ts"
      provides: "5 REST endpoints: start, patch, preview, commit, discard"
      contains: "@Controller('characters/:characterId/level-up')"
    - path: "server/src/modules/leveling/leveling.service.ts"
      provides: "Orchestration: startOrResume, patchState, computePreview, commit, discard"
      contains: "prisma.$transaction"
    - path: "server/src/modules/leveling/feat-filter.service.ts"
      provides: "Filtered feat lookup driven by prereq-evaluator + slot+source criteria"
      exports: ["FeatFilterService"]
    - path: "server/src/modules/leveling/leveling.service.spec.ts"
      provides: "Integration tests for atomic commit, broadcast count, hpCurrent invariant, race condition, FA, spellcaster"
      contains: "prisma.$transaction"
    - path: "server/src/modules/characters/characters.gateway.ts"
      provides: "Extended CharacterUpdatePayload['type'] union with 'level_up_committed'"
      contains: "'level_up_committed'"
    - path: "server/src/modules/characters/pathbuilder-import.service.ts"
      provides: "Extended import flow with prereq violations + FA auto-detect"
      contains: "evaluatePrereq"
  key_links:
    - from: "leveling.service.ts → commit()"
      to: "characters.gateway.ts → broadcastCharacterUpdate"
      via: "single emit AFTER $transaction returns"
      pattern: "broadcastCharacterUpdate.*level_up_committed"
    - from: "leveling.service.ts"
      to: "lib/recompute-derived-stats.ts"
      via: "import recomputeDerivedStats"
      pattern: "from.*lib/recompute-derived-stats"
    - from: "leveling.service.ts"
      to: "characters.service.ts → checkCharacterAccess"
      via: "delegated permission check"
      pattern: "checkCharacterAccess.*requireOwnership"
    - from: "feat-filter.service.ts"
      to: "lib/prereq-evaluator.ts"
      via: "import evaluatePrereq"
      pattern: "from.*lib/prereq-evaluator"
    - from: "pathbuilder-import.service.ts"
      to: "lib/prereq-evaluator.ts"
      via: "post-import evaluation loop"
      pattern: "evaluatePrereq"
    - from: "app.module.ts"
      to: "LevelingModule"
      via: "imports array"
      pattern: "LevelingModule"
---

<objective>
Build the server-side orchestration that ties together the schema (Plan 01), pure-function lib (Plan 02), and seed data (Plan 03) into the live REST + WebSocket surface that the React wizard (Plan 05) consumes. This plan creates the new NestJS `LevelingModule` with controller, service, DTOs, the supporting `FeatFilterService`, plus integration tests for the atomic commit transaction. It also extends two existing files: `characters.gateway.ts` (one-line union type) and `pathbuilder-import.service.ts` (prereq-evaluator integration + FA auto-detect).

Purpose: This is the load-bearing wave — without these REST endpoints + the atomic commit transaction + the WebSocket broadcast, the React wizard has nothing to call. The integration tests written here are the regression net for Pitfall #9 (no hpCurrent mutation), Pitfall #8 (boost cap honored end-to-end), and the partial-unique-index race-condition behavior.

Output: 9 new server files (1 module + 1 controller + 2 services + 4 DTOs + 1 barrel + 2 spec files = 11 files counting specs), 3 extended files, 320+ lines of integration tests with full coverage of VALIDATION.md rows 1-W3-01 through 1-W3-10.
</objective>

<execution_context>
@$HOME/.claude/get-shit-done/workflows/execute-plan.md
@$HOME/.claude/get-shit-done/templates/summary.md
</execution_context>

<context>
@.planning/PROJECT.md
@.planning/REQUIREMENTS.md
@.planning/phases/01-level-up-pf2e-regelkonform/01-CONTEXT.md
@.planning/phases/01-level-up-pf2e-regelkonform/01-RESEARCH.md
@.planning/phases/01-level-up-pf2e-regelkonform/01-PATTERNS.md
@.planning/phases/01-level-up-pf2e-regelkonform/01-VALIDATION.md
@.planning/phases/01-level-up-pf2e-regelkonform/01-01-SUMMARY.md
@.planning/phases/01-level-up-pf2e-regelkonform/01-02-SUMMARY.md
@.planning/phases/01-level-up-pf2e-regelkonform/01-03-SUMMARY.md
@server/src/modules/characters/characters.module.ts
@server/src/modules/characters/characters.controller.ts
@server/src/modules/characters/characters.service.ts
@server/src/modules/characters/characters.gateway.ts
@server/src/modules/characters/pathbuilder-import.service.ts
@server/src/modules/characters/dto/dying.dto.ts
@server/src/modules/characters/dto/alchemy.dto.ts
@server/src/modules/characters/dto/rest.dto.ts
@server/src/modules/characters/dto/index.ts
@server/src/modules/battle/combatants.service.ts
@server/src/app.module.ts
@server/src/modules/translations/translations.service.ts

<interfaces>
<!-- The Plan 02 lib that this plan consumes -->
```typescript
// From server/src/modules/leveling/lib/types.ts
export type Proficiency = 'UNTRAINED' | 'TRAINED' | 'EXPERT' | 'MASTER' | 'LEGENDARY';
export type StepKind = 'class-features' | 'class-feature-choice' | 'boost' | ... | 'review';
export type EvalResult = { ok: true } | { ok: false; reason: string } | { unknown: true; raw: string };
export interface CharacterContext { level, className, ancestryName, heritageName?, abilities, skills, feats }
export interface DerivedStats { level, hpMax, ac, classDc, perception, fortitude, reflex, will }
export interface ClassProgressionRow { className, level, grants[], proficiencyChanges, spellSlotIncrement?, ... }
export interface WizardChoices { boostTargets?, skillIncrease?, featClassId?, ..., classFeatureChoices?, spellcasterRepertoirePicks? }

// From server/src/modules/leveling/lib/apply-attribute-boost.ts
export function applyAttributeBoost(score: number): number;
export function isValidBoostSet(targets: readonly string[]): boolean;

// From server/src/modules/leveling/lib/skill-increase-cap.ts
export function canIncreaseSkill(currentRank: Proficiency, characterLevel: number): boolean;
export const SKILL_INCREASE_LEVELS: readonly number[];

// From server/src/modules/leveling/lib/prereq-evaluator.ts
export function evaluatePrereq(prereqString: string | null, ctx: CharacterContext): EvalResult;

// From server/src/modules/leveling/lib/recompute-derived-stats.ts
export function recomputeDerivedStats(character, choices, progression): DerivedStats;

// From server/src/modules/leveling/lib/compute-applicable-steps.ts
export function computeApplicableSteps(input): StepKind[];
```

<!-- Existing CharactersGateway broadcast (server/src/modules/characters/characters.gateway.ts:22-26 + broadcast method ~232) -->
```typescript
export interface CharacterUpdatePayload {
  characterId: string;
  type: 'hp' | 'conditions' | 'item' | 'inventory' | 'money' | 'level' | 'equipment_status' | 'rest'
      | 'alchemy_vials' | 'alchemy_formulas' | 'alchemy_prepared' | 'alchemy_state' | 'dying';
  data: any;  // (existing — leave for now)
}

// Method on the gateway (already exposed for other broadcasts):
broadcastCharacterUpdate(characterId: string, payload: CharacterUpdatePayload): void;
```

<!-- Existing CharactersService access pattern (server/src/modules/characters/characters.service.ts:63-86) -->
```typescript
// requireOwnership=true means "isOwner OR isGM" per RESEARCH.md line 862
async checkCharacterAccess(characterId: string, userId: string, requireOwnership = false) {
  // throws NotFoundException if missing, ForbiddenException if no access
  // returns the loaded Character (with campaign + members included)
}
```

<!-- Existing PathbuilderImportService.importCharacter signature (~248-272) -->
```typescript
async importCharacter(campaignId: string, ownerId: string, pathbuilderJson: PathbuilderJson) { ... }
```

<!-- Existing TranslationsService (server/src/modules/translations/translations.service.ts) -->
```typescript
// Used for D-15 — German translation of new prereq strings + class-feature descriptions.
async getTranslationsBatch(items: { englishText: string; context: string }[]): Promise<Record<string, string>>;
```

<!-- Pattern: app.module.ts registers each feature module in `imports: []` (line ~25) -->
```typescript
@Module({
  imports: [
    AuthModule, CampaignsModule, CharactersModule, EquipmentModule, FeatsModule,
    BattleModule, TranslationsModule, ConfigModule.forRoot({ ... }), JwtModule.registerAsync({ ... }),
    // ADD: LevelingModule
  ],
  ...
})
```
</interfaces>
</context>

<tasks>

<task type="auto" tdd="false">
  <name>Task 1: DTOs + barrel (start, patch, commit, level-up-state, index)</name>
  <files>
    server/src/modules/leveling/dto/start-level-up.dto.ts,
    server/src/modules/leveling/dto/patch-level-up.dto.ts,
    server/src/modules/leveling/dto/commit-level-up.dto.ts,
    server/src/modules/leveling/dto/level-up-state.dto.ts,
    server/src/modules/leveling/dto/index.ts
  </files>
  <read_first>
    - server/src/modules/characters/dto/dying.dto.ts (canonical small DTO with class-validator + ApiProperty)
    - server/src/modules/characters/dto/alchemy.dto.ts (nested DTO + ValidateNested + ApiPropertyOptional)
    - server/src/modules/characters/dto/rest.dto.ts (response DTO shape — RestPreviewDto for analog)
    - server/src/modules/characters/dto/index.ts (barrel pattern)
    - .planning/phases/01-level-up-pf2e-regelkonform/01-PATTERNS.md (lines 248-311 — DTO pattern with exact decorator usage)
    - server/src/modules/leveling/lib/types.ts (WizardChoices + DerivedStats — these typed shapes are the runtime contract)
  </read_first>
  <action>
    Create the four DTOs and the barrel.

    **1. `server/src/modules/leveling/dto/start-level-up.dto.ts`:**

    ```typescript
    import { ApiPropertyOptional } from '@nestjs/swagger';
    import { IsInt, IsOptional, Max, Min } from 'class-validator';

    export class StartLevelUpDto {
      @ApiPropertyOptional({ description: 'Target level (defaults to currentLevel + 1)', minimum: 2, maximum: 20 })
      @IsOptional()
      @IsInt()
      @Min(2)
      @Max(20)
      targetLevel?: number;
    }
    ```

    **2. `server/src/modules/leveling/dto/patch-level-up.dto.ts`:**

    ```typescript
    import { ApiProperty } from '@nestjs/swagger';
    import { IsObject } from 'class-validator';

    /**
     * Wire DTO for PATCH /level-up/:sessionId.
     * The full WizardChoices shape is validated in the service via a TS guard
     * (see leveling.service.ts → assertValidWizardChoices) — class-validator only
     * checks "is an object" at the wire boundary; deep validation happens in TS.
     */
    export class PatchLevelUpDto {
      @ApiProperty({ description: 'Partial WizardChoices to merge into the DRAFT', type: 'object' })
      @IsObject()
      state: Record<string, unknown>;
    }
    ```

    **3. `server/src/modules/leveling/dto/commit-level-up.dto.ts`:**

    ```typescript
    import { ApiPropertyOptional } from '@nestjs/swagger';
    import { IsBoolean, IsOptional } from 'class-validator';

    /**
     * No required fields — commit reads the latest persisted state.
     * Optional flag for client to acknowledge any pending non-evaluable prereqs.
     */
    export class CommitLevelUpDto {
      @ApiPropertyOptional({ description: 'Acknowledge any non-evaluable prereqs that were warned about' })
      @IsOptional()
      @IsBoolean()
      acknowledgePrereqWarnings?: boolean;
    }
    ```

    **4. `server/src/modules/leveling/dto/level-up-state.dto.ts`** (response shapes — used by Swagger + as TS types in the service):

    ```typescript
    import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
    import type { DerivedStats } from '../lib/types';

    /**
     * Response shape for GET /level-up/:sessionId/preview — Vorher/Nachher.
     */
    export class LevelUpPreviewDto {
      @ApiProperty({ description: 'Stats before commit (current Character state)' })
      before: DerivedStats;

      @ApiProperty({ description: 'Stats after commit (computed via recompute-derived-stats)' })
      after: DerivedStats;

      @ApiPropertyOptional({ description: 'Spellcaster slot increments (if applicable)' })
      spellcaster?: {
        slotIncrements: { tradition: string; spellLevel: number; count: number }[];
        cantripDelta?: number;
        repertoireDelta?: number;
      };
    }

    /**
     * Response shape for the LevelUpSession (start / patch / get).
     * `state` is the JSON-serializable WizardChoices + UI-only fields.
     */
    export class LevelUpSessionDto {
      @ApiProperty() id: string;
      @ApiProperty() characterId: string;
      @ApiProperty() targetLevel: number;
      @ApiProperty({ type: 'object', additionalProperties: true }) state: Record<string, unknown>;
      @ApiPropertyOptional({ nullable: true }) committedAt: Date | null;
      @ApiProperty() createdAt: Date;
      @ApiProperty() updatedAt: Date;
    }
    ```

    **5. `server/src/modules/leveling/dto/index.ts`:**

    ```typescript
    export * from './start-level-up.dto';
    export * from './patch-level-up.dto';
    export * from './commit-level-up.dto';
    export * from './level-up-state.dto';
    ```

    **Constraints:**
    - No `: any` outside the existing `data: any` on the gateway payload (which is left untouched per existing convention — RESEARCH.md line 873).
    - Use `import type` for type-only imports from sibling modules.
    - Mirror the exact decorator style of `dto/dying.dto.ts` and `dto/alchemy.dto.ts`.
  </action>
  <verify>
    <automated>cd server &amp;&amp; npx tsc --noEmit -p tsconfig.json 2&gt;&amp;1 | grep -E "leveling/dto" || echo "tsc clean"</automated>
  </verify>
  <acceptance_criteria>
    - All 5 files exist in `server/src/modules/leveling/dto/`
    - `start-level-up.dto.ts` exports `StartLevelUpDto`
    - `patch-level-up.dto.ts` exports `PatchLevelUpDto`
    - `commit-level-up.dto.ts` exports `CommitLevelUpDto`
    - `level-up-state.dto.ts` exports `LevelUpPreviewDto` and `LevelUpSessionDto`
    - `index.ts` re-exports all four DTO files
    - No file contains `: any` outside comments
    - `cd server && npx tsc --noEmit -p tsconfig.json` exits 0
  </acceptance_criteria>
  <done>
    All DTOs typed, validated with class-validator decorators, documented with Swagger, exported through barrel.
  </done>
</task>

<task type="auto" tdd="false">
  <name>Task 2: Extend characters.gateway.ts union — add 'level_up_committed' (single-line)</name>
  <files>server/src/modules/characters/characters.gateway.ts</files>
  <read_first>
    - server/src/modules/characters/characters.gateway.ts (entire file — must understand the existing union, broadcast method, room subscription)
    - .planning/phases/01-level-up-pf2e-regelkonform/01-PATTERNS.md (lines 376-396 — union extension pattern)
    - .planning/phases/01-level-up-pf2e-regelkonform/01-RESEARCH.md (lines 866-892 — exact `level_up_committed` payload shape)
    - client/src/shared/hooks/use-character-socket.ts (line 15 — mirror union; this client file is updated in Plan 05)
  </read_first>
  <action>
    Open `server/src/modules/characters/characters.gateway.ts`. Find the `CharacterUpdatePayload` interface (around line 22-26).

    Append `'level_up_committed'` to the `type` union (it currently ends with `'dying'`):

    BEFORE:
    ```typescript
    type: 'hp' | 'conditions' | 'item' | 'inventory' | 'money' | 'level' | 'equipment_status' | 'rest' | 'alchemy_vials' | 'alchemy_formulas' | 'alchemy_prepared' | 'alchemy_state' | 'dying';
    ```

    AFTER:
    ```typescript
    type: 'hp' | 'conditions' | 'item' | 'inventory' | 'money' | 'level' | 'equipment_status' | 'rest' | 'alchemy_vials' | 'alchemy_formulas' | 'alchemy_prepared' | 'alchemy_state' | 'dying' | 'level_up_committed';
    ```

    Do NOT change anything else in this file. The existing `data: any` stays (per RESEARCH.md line 873 — typed-event refactor is a future phase).

    **Document the new payload shape** by adding a comment ABOVE the interface (so Plan 05's client mirror has a contract to read):

    ```typescript
    /**
     * Payload for type='level_up_committed' (added in Phase 1):
     *   data: {
     *     level: number;                    // new level
     *     derived: {                        // recomputed stats from recompute-derived-stats.ts
     *       hpMax: number;
     *       ac: number;
     *       classDc: number;
     *       perception: number;
     *       fortitude: number;
     *       reflex: number;
     *       will: number;
     *     };
     *   }
     * Emitted ONCE per commit (Pitfall #9 / RESEARCH.md First-Phase-Note). Clients invalidate
     * the character query and refetch via REST for the full state.
     */
    export interface CharacterUpdatePayload {
      ...
    }
    ```
  </action>
  <verify>
    <automated>cd server &amp;&amp; grep -c "level_up_committed" src/modules/characters/characters.gateway.ts</automated>
  </verify>
  <acceptance_criteria>
    - File `server/src/modules/characters/characters.gateway.ts` contains the literal string `'level_up_committed'` (in the union)
    - File contains the JSDoc comment block describing the `data:` shape (look for `Payload for type='level_up_committed'`)
    - All other content unchanged — verify by checking that the broadcast method `broadcastCharacterUpdate` still exists and the room subscription `character:${characterId}` pattern is preserved
    - `cd server && npx tsc --noEmit -p tsconfig.json` exits 0
  </acceptance_criteria>
  <done>
    Single-line union extension applied; payload contract documented; gateway file otherwise unchanged.
  </done>
</task>

<task type="auto" tdd="false">
  <name>Task 3: FeatFilterService — filtered feat lookup driven by prereq-evaluator</name>
  <files>server/src/modules/leveling/feat-filter.service.ts</files>
  <read_first>
    - server/src/modules/leveling/lib/prereq-evaluator.ts (Plan 02 — function signature)
    - server/src/modules/leveling/lib/types.ts (CharacterContext, EvalResult)
    - server/prisma/schema.prisma (Feat model around line 544 — prerequisites: String?, source field, level field)
    - server/src/modules/feats/ (existing FeatsService — for reference on how feats are queried today)
    - .planning/phases/01-level-up-pf2e-regelkonform/01-RESEARCH.md (lines 590-597 — anti-pattern: don't compute prereqs client-side)
    - .planning/phases/01-level-up-pf2e-regelkonform/01-VALIDATION.md (row 1-W3-09 — exact assertion)
  </read_first>
  <action>
    Create `server/src/modules/leveling/feat-filter.service.ts` exposing a method that returns feats filtered by:
    1. **Slot kind**: `'class' | 'skill' | 'general' | 'ancestry' | 'archetype'`
    2. **Source**: matches `Feat.source` enum (CLASS / ANCESTRY / GENERAL / SKILL / ARCHETYPE / BONUS)
    3. **Class restriction** (for slot=class): only feats whose `Feat.className` matches character's class OR are general
    4. **Level cap**: only feats with `Feat.level <= character.level`
    5. **Prereq evaluation**: for each candidate, call `evaluatePrereq` with the character's CharacterContext
       - Include feats with `{ ok: true }` and `{ unknown: true }` (warning path per D-03)
       - EXCLUDE feats with `{ ok: false }` from default response
       - Optionally include `{ ok: false }` if `includeUnavailable=true` (UI toggle per UI-SPEC line 174)

    File contents:

    ```typescript
    import { Injectable } from '@nestjs/common';
    import { PrismaService } from '../../prisma/prisma.service';
    import { evaluatePrereq } from './lib/prereq-evaluator';
    import type { CharacterContext, EvalResult } from './lib/types';

    export type SlotKind = 'class' | 'skill' | 'general' | 'ancestry' | 'archetype';

    export interface FeatFilterRequest {
      slot: SlotKind;
      character: CharacterContext;
      maxLevel?: number;            // defaults to character.level
      includeUnavailable?: boolean; // include {ok:false} feats with reason annotated
    }

    export interface FeatWithEval {
      id: string;
      name: string;
      level: number;
      source: string;
      prerequisites: string | null;
      description: string;
      traits: string[];
      eval: EvalResult;
    }

    @Injectable()
    export class FeatFilterService {
      constructor(private prisma: PrismaService) {}

      async getFilteredFeats(req: FeatFilterRequest): Promise<FeatWithEval[]> {
        const maxLevel = req.maxLevel ?? req.character.level;

        // 1. Map slot → eligible source values
        const sourceFilter = this.sourcesForSlot(req.slot);

        // 2. Class filter (only matters for slot='class')
        const classFilter =
          req.slot === 'class'
            ? { OR: [{ className: req.character.className }, { className: null }] }
            : {};

        // 3. Query Feat table (existing schema)
        const feats = await this.prisma.feat.findMany({
          where: {
            source: { in: sourceFilter },
            level: { lte: maxLevel },
            ...classFilter,
          },
          orderBy: [{ level: 'asc' }, { name: 'asc' }],
          select: {
            id: true, name: true, level: true, source: true,
            prerequisites: true, description: true, traits: true, className: true,
          },
        });

        // 4. Evaluate prereqs against character context
        const evaluated: FeatWithEval[] = feats.map(f => ({
          id: f.id,
          name: f.name,
          level: f.level,
          source: f.source,
          prerequisites: f.prerequisites,
          description: f.description,
          traits: f.traits,
          eval: evaluatePrereq(f.prerequisites, req.character),
        }));

        // 5. Filter by eval result unless includeUnavailable
        if (req.includeUnavailable) return evaluated;
        return evaluated.filter(f => f.eval.ok === true || ('unknown' in f.eval && f.eval.unknown));
      }

      /**
       * Maps wizard slot to the Feat.source values eligible for that slot.
       * Slot 'general' allows both GENERAL and SKILL feats per LVL-05.
       */
      private sourcesForSlot(slot: SlotKind): string[] {
        switch (slot) {
          case 'class': return ['CLASS'];
          case 'skill': return ['SKILL'];
          case 'general': return ['GENERAL', 'SKILL'];   // LVL-05
          case 'ancestry': return ['ANCESTRY'];
          case 'archetype': return ['ARCHETYPE'];
        }
      }
    }
    ```

    **Note on Feat schema:** check `server/prisma/schema.prisma:544` for the actual column names (`source`, `level`, `prerequisites`, `traits`, `className`, `description`). If column names differ, adjust the `select` and `where` accordingly.

    **Constraints:**
    - `@Injectable()` decorator present (NestJS service).
    - Imports `evaluatePrereq` from the lib — does NOT re-implement.
    - No `: any`. The `Feat.source` field's type comes from Prisma — leave as the generated string type.
  </action>
  <verify>
    <automated>cd server &amp;&amp; npx tsc --noEmit -p tsconfig.json 2&gt;&amp;1 | grep -E "feat-filter" || echo "tsc clean"</automated>
  </verify>
  <acceptance_criteria>
    - File `server/src/modules/leveling/feat-filter.service.ts` exists
    - File contains `@Injectable()`
    - File imports `evaluatePrereq` from `./lib/prereq-evaluator`
    - File exports `FeatFilterService` class
    - File exports `SlotKind`, `FeatFilterRequest`, `FeatWithEval` types
    - File contains the literal string `prisma.feat.findMany` (proves DB integration)
    - File contains NO `: any` outside comments
    - `cd server && npx tsc --noEmit` exits 0
  </acceptance_criteria>
  <done>
    Service queries the existing Feat table, applies slot+source+class+level filters, evaluates prereqs, returns annotated results.
  </done>
</task>

<task type="auto" tdd="false">
  <name>Task 4: LevelingService — orchestration (start, patch, preview, commit, discard)</name>
  <files>server/src/modules/leveling/leveling.service.ts</files>
  <read_first>
    - server/src/modules/characters/characters.service.ts (entire file — checkCharacterAccess pattern + service-level error patterns)
    - server/src/modules/battle/combatants.service.ts (lines 82-118 — atomic transaction pattern)
    - server/src/modules/leveling/lib/* (Plan 02 — recompute, prereq, applicable-steps, boost, skill-cap)
    - .planning/phases/01-level-up-pf2e-regelkonform/01-PATTERNS.md (lines 173-247 — service pattern; 405-468 — atomic commit; 904-921 — broadcast pattern)
    - .planning/phases/01-level-up-pf2e-regelkonform/01-RESEARCH.md (lines 405-470 — Pattern 2 atomic commit example; lines 826-862 — REST endpoint shape)
    - .planning/phases/01-level-up-pf2e-regelkonform/01-CONTEXT.md (D-11 DRAFT, D-12 atomic + snapshot, D-13 owner+GM, D-14 one DRAFT)
    - server/src/modules/translations/translations.service.ts (TranslationsService.getTranslationsBatch signature for D-15)
  </read_first>
  <action>
    Create `server/src/modules/leveling/leveling.service.ts` containing the full orchestration. The class signature and method bodies are sketched below; executor implements full method bodies guided by the spec in Task 7 (the integration tests).

    **File header + class skeleton:**

    ```typescript
    import {
      Injectable, NotFoundException, ForbiddenException, BadRequestException, ConflictException,
      Inject, forwardRef, Logger,
    } from '@nestjs/common';
    import { PrismaService } from '../../prisma/prisma.service';
    import { CharactersService } from '../characters/characters.service';
    import { CharactersGateway } from '../characters/characters.gateway';
    import { TranslationsService } from '../translations/translations.service';
    import { applyAttributeBoost, isValidBoostSet } from './lib/apply-attribute-boost';
    import { canIncreaseSkill } from './lib/skill-increase-cap';
    import { evaluatePrereq } from './lib/prereq-evaluator';
    import { recomputeDerivedStats } from './lib/recompute-derived-stats';
    import { computeApplicableSteps } from './lib/compute-applicable-steps';
    import type {
      CharacterContext, DerivedStats, ClassProgressionRow, WizardChoices, StepKind,
    } from './lib/types';
    import type { StartLevelUpDto, PatchLevelUpDto, CommitLevelUpDto, LevelUpPreviewDto } from './dto';

    @Injectable()
    export class LevelingService {
      private readonly logger = new Logger(LevelingService.name);

      constructor(
        private prisma: PrismaService,
        @Inject(forwardRef(() => CharactersService))
        private charactersService: CharactersService,
        @Inject(forwardRef(() => CharactersGateway))
        private charactersGateway: CharactersGateway,
        private translationsService: TranslationsService,
      ) {}

      // ============================================================
      // PUBLIC API — called by LevelingController
      // ============================================================

      /**
       * Start a new DRAFT or resume the existing one for this character.
       * D-11/D-13/D-14 — owner-or-GM, one DRAFT per character (DB-enforced via partial unique index).
       */
      async startOrResume(characterId: string, dto: StartLevelUpDto, userId: string) {
        const character = await this.charactersService.checkCharacterAccess(characterId, userId, true);
        if (character.level >= 20) {
          throw new BadRequestException('Charakter ist bereits auf maximaler Stufe');
        }
        const targetLevel = dto.targetLevel ?? character.level + 1;
        if (targetLevel !== character.level + 1) {
          throw new BadRequestException(`Stufenaufstieg nur auf Stufe ${character.level + 1} möglich`);
        }

        // Try to resume the open DRAFT (partial unique index → 0 or 1 row)
        const existing = await this.prisma.levelUpSession.findFirst({
          where: { characterId, committedAt: null },
        });
        if (existing) {
          this.logger.log(`Resumed LevelUpSession ${existing.id} for character ${characterId}`);
          return existing;
        }

        // Create fresh DRAFT
        try {
          const created = await this.prisma.levelUpSession.create({
            data: {
              characterId,
              targetLevel,
              state: this.initialWizardState(),
            },
          });
          this.logger.log(`Created LevelUpSession ${created.id} for character ${characterId} → L${targetLevel}`);
          return created;
        } catch (e) {
          // Partial unique index race — another tab beat us. Re-fetch and return that one.
          const fallback = await this.prisma.levelUpSession.findFirst({
            where: { characterId, committedAt: null },
          });
          if (fallback) return fallback;
          throw e;
        }
      }

      /**
       * Merge a partial WizardChoices into the DRAFT.state JSON.
       * Validates shape via assertValidWizardChoices.
       */
      async patchState(characterId: string, sessionId: string, dto: PatchLevelUpDto, userId: string) {
        const session = await this.loadSessionAndAuthorize(sessionId, userId);
        if (session.characterId !== characterId) {
          throw new BadRequestException('Session gehört nicht zu diesem Charakter');
        }
        if (session.committedAt !== null) {
          throw new ConflictException('Session ist bereits committed');
        }

        // Merge: existing state + patch
        const newState: Record<string, unknown> = {
          ...(session.state as Record<string, unknown>),
          ...dto.state,
        };
        this.assertValidWizardChoices(newState);

        const updated = await this.prisma.levelUpSession.update({
          where: { id: sessionId },
          data: { state: newState },
        });
        return updated;
      }

      /**
       * Compute Vorher/Nachher DerivedStats without committing.
       * Reads ClassProgression + character snapshot, runs recomputeDerivedStats.
       */
      async computePreview(characterId: string, sessionId: string, userId: string): Promise<LevelUpPreviewDto> {
        const session = await this.loadSessionAndAuthorize(sessionId, userId);
        const character = await this.loadCharacterFullForRecompute(characterId);
        const progression = await this.loadProgression(character.className, session.targetLevel);

        const before: DerivedStats = this.computeBeforeStats(character);
        const choices = (session.state as Record<string, unknown>) as unknown as WizardChoices;
        const after: DerivedStats = recomputeDerivedStats(character, choices, progression);

        const spellcaster = this.computeSpellcasterPreview(progression, choices);
        return { before, after, spellcaster };
      }

      /**
       * Atomic commit: snapshot + character mutations + history insert + session.committedAt + ONE broadcast.
       * D-12 / Pitfall #9: never touches Character.hpCurrent.
       */
      async commit(characterId: string, sessionId: string, dto: CommitLevelUpDto, userId: string) {
        const session = await this.loadSessionAndAuthorize(sessionId, userId);
        if (session.characterId !== characterId) {
          throw new BadRequestException('Session gehört nicht zu diesem Charakter');
        }
        if (session.committedAt !== null) {
          throw new ConflictException('Session ist bereits committed');
        }

        const character = await this.loadCharacterFullForRecompute(characterId);
        if (character.level + 1 !== session.targetLevel) {
          throw new BadRequestException(
            `Charakter ist auf Stufe ${character.level}; Session erwartet Aufstieg auf Stufe ${session.targetLevel}`,
          );
        }

        const choices = (session.state as Record<string, unknown>) as unknown as WizardChoices;
        this.assertValidWizardChoices(choices);
        if (choices.boostTargets && !isValidBoostSet(choices.boostTargets)) {
          throw new BadRequestException('Boost-Set muss genau 4 verschiedene Attribute enthalten');
        }

        const progression = await this.loadProgression(character.className, session.targetLevel);
        const newDerived = recomputeDerivedStats(character, choices, progression);
        const snapshotJson = this.buildSnapshot(character);

        // ============ ATOMIC TRANSACTION ============
        const result = await this.prisma.$transaction(async (tx) => {
          // 1. Snapshot history
          await tx.levelUpHistory.create({
            data: {
              characterId,
              levelFrom: character.level,
              levelTo: session.targetLevel,
              snapshotBefore: snapshotJson,
              choices: session.state as never,
            },
          });

          // 2. Character update — level + hpMax + freeArchetype passthrough.
          // CRITICAL: do NOT touch hpCurrent (Pitfall #9).
          await tx.character.update({
            where: { id: characterId },
            data: {
              level: session.targetLevel,
              hpMax: newDerived.hpMax,
              // (hpCurrent intentionally absent)
            },
          });

          // 3. Boost targets → CharacterAbility upserts (4 rows max)
          if (choices.boostTargets) {
            for (const ability of choices.boostTargets) {
              const current = character.abilities[ability];
              const newScore = applyAttributeBoost(current);
              await tx.characterAbility.upsert({
                where: { characterId_ability: { characterId, ability } },
                update: { score: newScore },
                create: { characterId, ability, score: newScore },
              });
            }
          }

          // 4. Skill increase
          if (choices.skillIncrease) {
            await tx.characterSkill.upsert({
              where: { characterId_skillName: { characterId, skillName: choices.skillIncrease.skillName } },
              update: { proficiency: choices.skillIncrease.toRank },
              create: {
                characterId,
                skillName: choices.skillIncrease.skillName,
                proficiency: choices.skillIncrease.toRank,
              },
            });
          }

          // 5. Feat picks → CharacterFeat creates
          const featSlots: Array<[keyof WizardChoices, string]> = [
            ['featClassId', 'CLASS'],
            ['featSkillId', 'SKILL'],
            ['featGeneralId', 'GENERAL'],
            ['featAncestryId', 'ANCESTRY'],
            ['featArchetypeId', 'ARCHETYPE'],
          ];
          for (const [field, source] of featSlots) {
            const featId = (choices as Record<string, unknown>)[field as string] as string | undefined;
            if (featId) {
              await tx.characterFeat.create({
                data: {
                  characterId,
                  featId,
                  source,
                  level: session.targetLevel,
                },
              });
            }
          }

          // 6. Class-feature choice picks → CharacterFeat creates with optionKey
          if (choices.classFeatureChoices) {
            for (const [choiceKey, optionKey] of Object.entries(choices.classFeatureChoices)) {
              const option = await tx.classFeatureOption.findUnique({
                where: { optionsRef_optionKey: { optionsRef: choiceKey, optionKey } },
              });
              if (option) {
                await tx.characterFeat.create({
                  data: {
                    characterId,
                    featId: null as never,        // class-feature choice may have no featId — schema permitting
                    name: option.name,
                    source: 'CLASS',
                    level: session.targetLevel,
                  },
                });
              }
            }
          }

          // 7. Spellcaster — apply spellSlotIncrement / cantripIncrement / repertoirePicks
          if (progression.spellSlotIncrement) {
            // Implementation depends on existing CharacterResource shape — executor adapts.
            // Pattern: upsert CharacterResource for {tradition, spellLevel} key, increment count.
          }
          if (choices.spellcasterRepertoirePicks?.length) {
            for (const spellId of choices.spellcasterRepertoirePicks) {
              await tx.characterSpell.create({
                data: { characterId, spellId, isInRepertoire: true } as never,
              });
            }
          }

          // 8. Mark session committed (soft-archive per RESEARCH.md line 470)
          await tx.levelUpSession.update({
            where: { id: sessionId },
            data: { committedAt: new Date() },
          });

          return tx.character.findUnique({
            where: { id: characterId },
            include: { abilities: true, skills: true, feats: true },
          });
        });
        // ============ END TRANSACTION ============

        // 9. SINGLE WebSocket broadcast (Pitfall #9 / RESEARCH.md First-Phase-Note)
        this.charactersGateway.broadcastCharacterUpdate(characterId, {
          characterId,
          type: 'level_up_committed',
          data: {
            level: session.targetLevel,
            derived: newDerived,
          },
        });

        // 10. D-15 — kick off German translation of any new prereq strings + class-feature
        //     descriptions used by this commit (fire-and-forget; cached for next view).
        await this.maybeTranslateNewStrings(progression, choices).catch(e =>
          this.logger.warn(`Translation kick-off failed: ${(e as Error).message}`),
        );

        this.logger.log(`Committed level-up: characterId=${characterId} fromLevel=${character.level} toLevel=${session.targetLevel}`);
        return result;
      }

      /** Discard a DRAFT — no character mutation. */
      async discard(characterId: string, sessionId: string, userId: string) {
        const session = await this.loadSessionAndAuthorize(sessionId, userId);
        if (session.characterId !== characterId) {
          throw new BadRequestException('Session gehört nicht zu diesem Charakter');
        }
        if (session.committedAt !== null) {
          throw new ConflictException('Bereits committed — kann nicht verworfen werden');
        }
        await this.prisma.levelUpSession.delete({ where: { id: sessionId } });
        this.logger.log(`Discarded LevelUpSession ${sessionId} for character ${characterId}`);
      }

      // ============================================================
      // PRIVATE HELPERS
      // ============================================================

      private initialWizardState(): Record<string, unknown> {
        return { choices: {}, acknowledgedNonEvaluablePrereqs: [] };
      }

      /**
       * TS guard for in-flight wizard state. Throws BadRequestException if shape is invalid.
       * Cheap structural validation only — does NOT validate against PF2e rules (commit() does).
       */
      private assertValidWizardChoices(state: unknown): asserts state is Record<string, unknown> {
        if (!state || typeof state !== 'object') {
          throw new BadRequestException('Ungültiges Wizard-State-Format');
        }
        // Optional further checks: boostTargets is array of valid abbreviations, etc.
        const s = state as Record<string, unknown>;
        if (s.boostTargets !== undefined) {
          if (!Array.isArray(s.boostTargets) || s.boostTargets.some(t => typeof t !== 'string')) {
            throw new BadRequestException('boostTargets muss ein Array von Strings sein');
          }
        }
      }

      private async loadSessionAndAuthorize(sessionId: string, userId: string) {
        const session = await this.prisma.levelUpSession.findUnique({
          where: { id: sessionId },
        });
        if (!session) throw new NotFoundException('Stufenaufstiegs-Session nicht gefunden');
        // Delegate access check to the character path
        await this.charactersService.checkCharacterAccess(session.characterId, userId, true);
        return session;
      }

      private async loadCharacterFullForRecompute(characterId: string) {
        // Load character + relations needed by recompute (abilities, skills, feats, ancestry, class)
        // Returns shape compatible with CharacterContext + the extra fields recompute needs
        // (ancestryHp, classHp, armorAc, armorProficiency, dexCap, className).
        // Executor implements actual joins per existing schema.
        throw new Error('TODO: implement loadCharacterFullForRecompute');
      }

      private async loadProgression(className: string, level: number): Promise<ClassProgressionRow> {
        const row = await this.prisma.classProgression.findUnique({
          where: { className_level: { className, level } },
        });
        if (!row) throw new NotFoundException(`Keine ClassProgression für ${className} Stufe ${level}`);
        return row as unknown as ClassProgressionRow;
      }

      private computeBeforeStats(character: never): DerivedStats {
        // Read existing Character.hpMax/ac/etc. directly — no recompute (this is the "Vorher" snapshot)
        throw new Error('TODO: read existing stats from character object');
      }

      private buildSnapshot(character: never): Record<string, unknown> {
        // Capture full character + relations subset for LevelUpHistory.snapshotBefore
        throw new Error('TODO: build snapshot JSON');
      }

      private computeSpellcasterPreview(progression: ClassProgressionRow, choices: WizardChoices): LevelUpPreviewDto['spellcaster'] {
        if (!progression.spellSlotIncrement && !progression.cantripIncrement && !progression.repertoireIncrement) {
          return undefined;
        }
        return {
          slotIncrements: progression.spellSlotIncrement ? [progression.spellSlotIncrement] : [],
          cantripDelta: progression.cantripIncrement ?? undefined,
          repertoireDelta: progression.repertoireIncrement ?? undefined,
        };
      }

      private async maybeTranslateNewStrings(progression: ClassProgressionRow, choices: WizardChoices): Promise<void> {
        // For D-15: collect new prereq strings + class-feature descriptions encountered in this commit.
        // Pass them to TranslationsService.getTranslationsBatch — German results cached in DB.
        const items: { englishText: string; context: string }[] = [];
        for (const grant of progression.grants) {
          items.push({ englishText: grant, context: 'class-feature-name' });
        }
        if (items.length > 0) {
          await this.translationsService.getTranslationsBatch(items);
        }
      }
    }
    ```

    **Implementation notes for the executor:**

    1. The TODO methods (`loadCharacterFullForRecompute`, `computeBeforeStats`, `buildSnapshot`) require reading the existing Character schema (`abilities`, `skills`, `feats`, `equipped armor` for AC, etc.). The executor reads `server/prisma/schema.prisma` lines 171-269 to wire these correctly.

    2. The transaction body's specific upsert keys (e.g. `characterId_ability`) depend on the actual `@@unique` constraints on the existing CharacterAbility/CharacterSkill/CharacterFeat tables. Verify against `schema.prisma` and adjust.

    3. The `data: any` cast in the broadcast payload is fine — it matches the existing gateway's untyped `data: any` (which is intentional per RESEARCH.md line 873; full typing is a future-phase refactor).

    4. The `as unknown as` casts on `WizardChoices` are pragmatic Prisma-Json-to-TS bridges. Wrap them in the assertValidWizardChoices guard for safety.

    5. Use `Logger` (NestJS) for every commit/discard/start log line — discoverable via NestJS log pipeline.

    **Constraints:**
    - `@Injectable()` decorator.
    - Owner-or-GM permission per D-13 via `checkCharacterAccess(..., requireOwnership=true)`.
    - SINGLE broadcast at the end (after `$transaction` returns).
    - NEVER touch `hpCurrent` in the character update payload.
    - All German user-facing error messages.
    - No `: any` outside the existing gateway untyped-data convention.
  </action>
  <verify>
    <automated>cd server &amp;&amp; npx tsc --noEmit -p tsconfig.json 2&gt;&amp;1 | grep -E "leveling.service" || echo "tsc clean"</automated>
  </verify>
  <acceptance_criteria>
    - File `server/src/modules/leveling/leveling.service.ts` exists
    - File contains `@Injectable()`
    - File contains the literal string `prisma.$transaction` (proves atomic commit pattern)
    - File contains the literal string `'level_up_committed'` (proves broadcast emission)
    - File contains the literal string `checkCharacterAccess` and `requireOwnership=true` or `requireOwnership = true` (D-13)
    - File contains the literal string `applyAttributeBoost` (uses Plan 02 boost helper)
    - File contains the literal string `recomputeDerivedStats` (uses Plan 02 recompute)
    - File does NOT contain the literal string `hpCurrent:` inside the `tx.character.update({ where..., data: ` block (Pitfall #9)
    - File does NOT contain the literal string `: any` outside comments (the `data: any` of the broadcast payload literal is fine — that's the existing gateway contract)
    - File contains German strings (verifiable: at least one of `Stufenaufstieg`, `Charakter`, `Sitzung`, `Stufe` appears as user-facing message)
    - All five public methods present: `startOrResume`, `patchState`, `computePreview`, `commit`, `discard`
    - `cd server && npx tsc --noEmit -p tsconfig.json` exits 0 (TODO bodies count as type-correct after executor fills them in)
  </acceptance_criteria>
  <done>
    Service compiles, exposes 5 public methods, uses lib helpers, atomic transaction pattern in place, broadcast emitted once, hpCurrent never written, German messages.
  </done>
</task>

<task type="auto" tdd="false">
  <name>Task 5: LevelingController — 5 REST endpoints</name>
  <files>server/src/modules/leveling/leveling.controller.ts</files>
  <read_first>
    - server/src/modules/characters/characters.controller.ts (canonical controller — endpoint pattern, decorators, CurrentUser)
    - server/src/common/decorators/current-user.decorator.ts (extracts userId from JWT)
    - .planning/phases/01-level-up-pf2e-regelkonform/01-PATTERNS.md (lines 130-169 — controller pattern with decorators)
    - .planning/phases/01-level-up-pf2e-regelkonform/01-RESEARCH.md (lines 826-862 — exact controller shape)
  </read_first>
  <action>
    Create `server/src/modules/leveling/leveling.controller.ts`:

    ```typescript
    import {
      Body, Controller, Delete, Get, Param, Patch, Post,
    } from '@nestjs/common';
    import {
      ApiBearerAuth, ApiOperation, ApiResponse, ApiTags,
    } from '@nestjs/swagger';
    import { LevelingService } from './leveling.service';
    import { CurrentUser } from '../../common/decorators/current-user.decorator';
    import {
      StartLevelUpDto,
      PatchLevelUpDto,
      CommitLevelUpDto,
      LevelUpPreviewDto,
      LevelUpSessionDto,
    } from './dto';

    @ApiTags('Level-Up')
    @ApiBearerAuth()
    @Controller('characters/:characterId/level-up')
    export class LevelingController {
      constructor(private readonly levelingService: LevelingService) {}

      @Post()
      @ApiOperation({ summary: 'Start a new level-up session or resume the open one' })
      @ApiResponse({ status: 201, description: 'LevelUpSession created or resumed', type: LevelUpSessionDto })
      async start(
        @Param('characterId') characterId: string,
        @Body() dto: StartLevelUpDto,
        @CurrentUser('id') userId: string,
      ) {
        return this.levelingService.startOrResume(characterId, dto, userId);
      }

      @Patch(':sessionId')
      @ApiOperation({ summary: 'Merge partial wizard state into the DRAFT' })
      @ApiResponse({ status: 200, description: 'Updated LevelUpSession', type: LevelUpSessionDto })
      async patch(
        @Param('characterId') characterId: string,
        @Param('sessionId') sessionId: string,
        @Body() dto: PatchLevelUpDto,
        @CurrentUser('id') userId: string,
      ) {
        return this.levelingService.patchState(characterId, sessionId, dto, userId);
      }

      @Get(':sessionId/preview')
      @ApiOperation({ summary: 'Vorher/Nachher-Vorschau (no commit)' })
      @ApiResponse({ status: 200, description: 'Preview', type: LevelUpPreviewDto })
      async preview(
        @Param('characterId') characterId: string,
        @Param('sessionId') sessionId: string,
        @CurrentUser('id') userId: string,
      ): Promise<LevelUpPreviewDto> {
        return this.levelingService.computePreview(characterId, sessionId, userId);
      }

      @Post(':sessionId/commit')
      @ApiOperation({ summary: 'Bestätigen — atomic commit' })
      @ApiResponse({ status: 200, description: 'Updated Character' })
      async commit(
        @Param('characterId') characterId: string,
        @Param('sessionId') sessionId: string,
        @Body() dto: CommitLevelUpDto,
        @CurrentUser('id') userId: string,
      ) {
        return this.levelingService.commit(characterId, sessionId, dto, userId);
      }

      @Delete(':sessionId')
      @ApiOperation({ summary: 'Verwerfen — discard the DRAFT' })
      @ApiResponse({ status: 204, description: 'DRAFT removed' })
      async discard(
        @Param('characterId') characterId: string,
        @Param('sessionId') sessionId: string,
        @CurrentUser('id') userId: string,
      ): Promise<void> {
        await this.levelingService.discard(characterId, sessionId, userId);
      }
    }
    ```

    **Constraints:**
    - JWT auth is global (per `server/src/app.module.ts` lines 53-56) — no `@UseGuards` needed.
    - `@CurrentUser('id')` decorator extracts userId from JWT.
    - Route prefix: `characters/:characterId/level-up` so DELETE/PATCH/COMMIT all share the same shape.
    - All Swagger decorators present for OpenAPI generation.
  </action>
  <verify>
    <automated>cd server &amp;&amp; npx tsc --noEmit -p tsconfig.json 2&gt;&amp;1 | grep -E "leveling.controller" || echo "tsc clean"</automated>
  </verify>
  <acceptance_criteria>
    - File `server/src/modules/leveling/leveling.controller.ts` exists
    - File contains `@Controller('characters/:characterId/level-up')`
    - File contains `@Post()` (start), `@Patch(':sessionId')` (patch), `@Get(':sessionId/preview')`, `@Post(':sessionId/commit')`, `@Delete(':sessionId')`
    - All 5 methods present with `@ApiOperation` decorators
    - File imports `LevelingService` and DTOs from barrel
    - File contains `@CurrentUser('id') userId: string`
    - File contains NO `: any`
    - `cd server && npx tsc --noEmit -p tsconfig.json` exits 0
  </acceptance_criteria>
  <done>
    Controller exposes 5 REST endpoints with full Swagger annotations, JWT auth via global guard, delegates to LevelingService.
  </done>
</task>

<task type="auto" tdd="false">
  <name>Task 6: LevelingModule + register in AppModule</name>
  <files>
    server/src/modules/leveling/leveling.module.ts,
    server/src/app.module.ts
  </files>
  <read_first>
    - server/src/modules/characters/characters.module.ts (canonical module — JwtModule + provider list)
    - server/src/app.module.ts (where to register — imports array, line ~25)
    - .planning/phases/01-level-up-pf2e-regelkonform/01-PATTERNS.md (lines 92-127 — module pattern + app.module registration)
  </read_first>
  <action>
    **1. Create `server/src/modules/leveling/leveling.module.ts`:**

    ```typescript
    import { Module, forwardRef } from '@nestjs/common';
    import { JwtModule } from '@nestjs/jwt';
    import { ConfigModule, ConfigService } from '@nestjs/config';
    import { LevelingController } from './leveling.controller';
    import { LevelingService } from './leveling.service';
    import { FeatFilterService } from './feat-filter.service';
    import { CharactersModule } from '../characters/characters.module';
    import { TranslationsModule } from '../translations/translations.module';

    @Module({
      imports: [
        TranslationsModule,
        forwardRef(() => CharactersModule),
        JwtModule.registerAsync({
          imports: [ConfigModule],
          useFactory: async (configService: ConfigService) => ({
            secret: configService.get<string>('JWT_SECRET'),
          }),
          inject: [ConfigService],
        }),
      ],
      controllers: [LevelingController],
      providers: [LevelingService, FeatFilterService],
      exports: [LevelingService, FeatFilterService],
    })
    export class LevelingModule {}
    ```

    **2. Register in `server/src/app.module.ts`:**

    Open the file. Find the `imports: [...]` array on `@Module({ ... })`. Append `LevelingModule` to it.

    Add the import statement at the top of the file:

    ```typescript
    import { LevelingModule } from './modules/leveling/leveling.module';
    ```

    Add to the imports array (alphabetical order with other feature modules):

    ```typescript
    imports: [
      // ... existing modules ...
      LevelingModule,
      // ... rest ...
    ],
    ```

    Do NOT touch any other configuration in app.module.ts (JwtAuthGuard, validation pipe, etc. all stay).

    Note on `forwardRef`: CharactersModule already imports things and providing `LevelingService` may create a circular dep if CharactersGateway is exported from CharactersModule and LevelingService injects it. Use `forwardRef(() => CharactersModule)` per PATTERNS.md to break the cycle. CharactersModule must export `CharactersGateway` and `CharactersService` for LevelingService to inject them — verify this in `characters.module.ts` and add to its `exports: []` if missing.

    **If CharactersModule does NOT currently export `CharactersGateway` or `CharactersService`:** open `server/src/modules/characters/characters.module.ts` and add them to `exports: []`. This is a non-breaking change.
  </action>
  <verify>
    <automated>cd server &amp;&amp; npm run build 2&gt;&amp;1 | tail -20</automated>
  </verify>
  <acceptance_criteria>
    - File `server/src/modules/leveling/leveling.module.ts` exists with `@Module` decorator
    - File contains `controllers: [LevelingController]`
    - File contains `providers: [LevelingService, FeatFilterService]`
    - File contains `exports: [LevelingService, FeatFilterService]`
    - File contains `forwardRef(() => CharactersModule)`
    - `server/src/app.module.ts` contains the import line `import { LevelingModule } from './modules/leveling/leveling.module'`
    - `server/src/app.module.ts` references `LevelingModule` inside an `imports: [` array
    - `server/src/modules/characters/characters.module.ts` exports `CharactersGateway` AND `CharactersService` (verify or add)
    - `cd server && npm run build` exits 0 (Nest can resolve the dependency graph at compile time)
  </acceptance_criteria>
  <done>
    LevelingModule wired, registered in AppModule, no circular-dep errors at build, NestJS recognizes the new endpoints (visible in startup log when started, and in Swagger).
  </done>
</task>

<task type="auto" tdd="false">
  <name>Task 7: Integration tests for LevelingService — atomic commit, broadcast count, hpCurrent invariant, race condition</name>
  <files>
    server/src/modules/leveling/leveling.service.spec.ts,
    server/src/modules/leveling/feat-filter.service.spec.ts
  </files>
  <read_first>
    - .planning/phases/01-level-up-pf2e-regelkonform/01-VALIDATION.md (rows 1-W3-01 to 1-W3-10 — every assertion must be covered)
    - .planning/phases/01-level-up-pf2e-regelkonform/01-PATTERNS.md (lines 1027-1031 — first NestJS integration test, no analog — use @nestjs/testing)
    - server/src/modules/leveling/leveling.service.ts (the SUT)
    - .planning/phases/01-level-up-pf2e-regelkonform/01-RESEARCH.md (lines 992-1007 — integration test rows from research)
  </read_first>
  <action>
    Create `server/src/modules/leveling/leveling.service.spec.ts`. Use `@nestjs/testing` (already installed) with the real `PrismaService` against a test database — OR mock Prisma if the dev setup doesn't have a test DB. Default: use Prisma against the dev DB with cleanup after each test (Phase 1 establishes the integration test pattern; future phases may invest in a Testcontainers-backed test DB).

    **Test plan (from VALIDATION.md):**

    ```typescript
    import { Test, TestingModule } from '@nestjs/testing';
    import { LevelingService } from './leveling.service';
    import { PrismaService } from '../../prisma/prisma.service';
    import { CharactersService } from '../characters/characters.service';
    import { CharactersGateway } from '../characters/characters.gateway';
    import { TranslationsService } from '../translations/translations.service';

    describe('LevelingService — integration', () => {
      let service: LevelingService;
      let prisma: PrismaService;
      let gatewayBroadcastSpy: jest.SpyInstance;
      let testCharacterId: string;
      let testUserId: string;

      beforeAll(async () => {
        const module: TestingModule = await Test.createTestingModule({
          providers: [
            LevelingService,
            PrismaService,
            // Use mocks for Characters services where appropriate
            {
              provide: CharactersService,
              useValue: { checkCharacterAccess: jest.fn().mockResolvedValue({ /* test character */ }) },
            },
            {
              provide: CharactersGateway,
              useValue: { broadcastCharacterUpdate: jest.fn() },
            },
            {
              provide: TranslationsService,
              useValue: { getTranslationsBatch: jest.fn().mockResolvedValue({}) },
            },
          ],
        }).compile();
        service = module.get(LevelingService);
        prisma = module.get(PrismaService);

        const gw = module.get<CharactersGateway>(CharactersGateway);
        gatewayBroadcastSpy = jest.spyOn(gw, 'broadcastCharacterUpdate');

        // Set up a test character + user in the DB (executor implements seeding)
        // ...
      });

      afterEach(async () => {
        // Clean up LevelUpSession rows created in tests (executor implements cleanup)
      });

      afterAll(async () => {
        await prisma.$disconnect();
      });

      // 1-W3-01 + 1-W3-02
      describe('commit transaction atomicity', () => {
        it('rolls back ALL writes when mid-transaction throws', async () => {
          // Arrange: create a session whose commit will fail at the broadcast step
          // (mock something inside the tx to throw, e.g. a missing ClassProgression row).
          // Assert: Character.level UNCHANGED, no LevelUpHistory row created.
          // Executor implements with a forced error injection.
        });

        it('creates exactly one LevelUpHistory row with snapshotBefore + choices populated', async () => {
          // Happy path: full commit. Assert LevelUpHistory row count = 1, fields non-null.
        });
      });

      // 1-W3-03
      describe('broadcast count', () => {
        it('emits level_up_committed exactly once per commit', async () => {
          gatewayBroadcastSpy.mockClear();
          // ... run commit ...
          expect(gatewayBroadcastSpy).toHaveBeenCalledTimes(1);
          expect(gatewayBroadcastSpy.mock.calls[0][1].type).toBe('level_up_committed');
        });
      });

      // Pitfall #9 — explicit hpCurrent invariant
      describe('Pitfall #9 — never mutates hpCurrent', () => {
        it('does NOT include hpCurrent in the character update payload', async () => {
          // Capture the prisma.character.update call (spy on prisma.character.update).
          // Assert: the data: object passed to update does NOT contain hpCurrent.
        });
      });

      // 1-W3-04
      describe('discard', () => {
        it('removes the DRAFT and leaves the character untouched', async () => {
          // Create DRAFT, change Character.level snapshot, discard, assert Character unchanged + no DRAFT row.
        });
      });

      // 1-W3-05 — race condition / partial unique index
      describe('partial unique index', () => {
        it('allows creating a new DRAFT after the previous was committed', async () => {
          // Create DRAFT, commit it (committedAt becomes non-null), create a second DRAFT — should succeed.
        });

        it('rejects creating a second open DRAFT for the same character', async () => {
          // Create DRAFT, attempt to create another via raw insert — should hit partial unique violation.
          // (Note: startOrResume() returns the existing one — the test exercises the DB constraint via raw SQL.)
        });
      });

      // 1-W3-06 + 1-W3-07
      describe('spellcaster slot increments', () => {
        it('applies spellSlotIncrement from ClassProgression for caster classes', async () => {
          // Use a Wizard character; commit L1→L2; assert CharacterResource (or whatever stores slots) reflects +1 grade-1 slot.
        });

        it('does NOT add slots for non-casters (Fighter)', async () => {
          // Use a Fighter character; commit; assert no spell-slot writes.
        });
      });

      // 1-W3-08 — translation pipeline
      describe('translation kick-off', () => {
        it('calls TranslationsService.getTranslationsBatch with new prereq strings during commit', async () => {
          const spy = jest.spyOn(/* TranslationsService instance */ {} as never, 'getTranslationsBatch');
          // ... commit ...
          expect(spy).toHaveBeenCalled();
        });
      });

      // 1-W3-10 — access control
      describe('access control (D-13)', () => {
        it('rejects when user is neither Owner nor GM', async () => {
          await expect(
            service.startOrResume(testCharacterId, {}, 'random-user-id'),
          ).rejects.toThrow(/Forbidden|Kein Zugriff/);
        });
      });
    });
    ```

    **Also create `server/src/modules/leveling/feat-filter.service.spec.ts`** (1-W3-09):

    ```typescript
    import { Test } from '@nestjs/testing';
    import { FeatFilterService } from './feat-filter.service';
    import { PrismaService } from '../../prisma/prisma.service';

    describe('FeatFilterService', () => {
      let service: FeatFilterService;

      beforeAll(async () => {
        const module = await Test.createTestingModule({
          providers: [FeatFilterService, PrismaService],
        }).compile();
        service = module.get(FeatFilterService);
      });

      describe('getFilteredFeats', () => {
        it('returns only feats with eval.ok === true OR eval.unknown === true (default)', async () => {
          const ctx = { /* CharacterContext */ } as never;
          const result = await service.getFilteredFeats({ slot: 'class', character: ctx });
          for (const f of result) {
            expect(f.eval.ok === true || ('unknown' in f.eval && f.eval.unknown)).toBe(true);
          }
        });

        it('respects slot=class → only CLASS-source feats', async () => {
          const ctx = { /* ... */ } as never;
          const result = await service.getFilteredFeats({ slot: 'class', character: ctx });
          for (const f of result) expect(f.source).toBe('CLASS');
        });

        it('respects slot=general → returns BOTH GENERAL and SKILL feats (LVL-05)', async () => {
          const ctx = { /* ... */ } as never;
          const result = await service.getFilteredFeats({ slot: 'general', character: ctx });
          const sources = new Set(result.map(f => f.source));
          expect(sources.has('GENERAL') || sources.has('SKILL')).toBe(true);
        });

        it('with includeUnavailable=true returns failed feats annotated with reason', async () => {
          const ctx = { /* … */ } as never;
          const result = await service.getFilteredFeats({ slot: 'class', character: ctx, includeUnavailable: true });
          // At least some result must have eval.ok === false (assuming the seeded Feat table has any)
        });
      });
    });
    ```

    **Implementation note for the executor:**

    Many of the integration tests need real DB seeds (a test character, a test campaign, ClassProgression rows for Wizard L1, etc.). The executor sets these up in `beforeAll` and tears down in `afterEach`/`afterAll`. If the dev environment doesn't have a separate test DB, tests run against the dev DB but use unique IDs and clean up after themselves.

    Tests are slower than unit tests; that's expected for integration tier. The full suite should still complete in <30s per VALIDATION.md "Estimated runtime".
  </action>
  <verify>
    <automated>cd server &amp;&amp; npm test -- --testPathPattern=leveling</automated>
  </verify>
  <acceptance_criteria>
    - File `server/src/modules/leveling/leveling.service.spec.ts` exists
    - File contains at least 9 `it(` invocations covering: atomicity, history-row, broadcast-count, hpCurrent invariant, discard, partial-unique-index (×2), spellcaster (×2), translation, access control
    - File `server/src/modules/leveling/feat-filter.service.spec.ts` exists with at least 4 `it(` invocations
    - File contains the assertion `expect(gatewayBroadcastSpy).toHaveBeenCalledTimes(1)` (Pitfall #9 broadcast count check)
    - File contains an assertion that the prisma.character.update payload does NOT contain `hpCurrent` (Pitfall #9)
    - File contains a partial-unique-index assertion (race-condition test)
    - `cd server && npm test -- --testPathPattern=leveling` exits 0 (all leveling tests including the Plan 02 lib + Plan 04 integration tests pass)
    - Total leveling test count is at least 60 (50 from Plan 02 lib + at least 13 here)
  </acceptance_criteria>
  <done>
    Integration tests written for atomic commit transaction, broadcast count, hpCurrent invariant, race condition, FA, spellcaster, translation, access control. All VALIDATION.md W3 rows (1-W3-01 through 1-W3-10) covered. Full leveling suite green.
  </done>
</task>

<task type="auto" tdd="false">
  <name>Task 8: Extend pathbuilder-import.service.ts — prereq violations + FA auto-detect</name>
  <files>server/src/modules/characters/pathbuilder-import.service.ts</files>
  <read_first>
    - server/src/modules/characters/pathbuilder-import.service.ts (entire file — must understand the existing import flow, especially lines 248-272 where feats are processed)
    - server/src/modules/leveling/lib/prereq-evaluator.ts (Plan 02)
    - server/src/modules/leveling/lib/types.ts (CharacterContext shape)
    - .planning/phases/01-level-up-pf2e-regelkonform/01-PATTERNS.md (lines 400-432 — pathbuilder-import extension pattern)
    - .planning/phases/01-level-up-pf2e-regelkonform/01-RESEARCH.md (lines 577-587 — Pattern 6 FA auto-detect heuristic)
    - .planning/phases/01-level-up-pf2e-regelkonform/01-CONTEXT.md (D-05/D-06 prereq violations; D-09 FA auto-detect)
  </read_first>
  <action>
    Open `server/src/modules/characters/pathbuilder-import.service.ts`. After the existing `importCharacter` function creates the Character + CharacterFeat rows (~lines 248-272), append two new steps:

    **Step A — Run prereq evaluator over imported feats and persist violations to Character.prereqViolations (D-05/D-06):**

    Add this block at the END of the `importCharacter` method, BEFORE the return statement:

    ```typescript
    // === Phase 1: Prereq evaluation across imported feats (D-05, D-06) ===
    const characterContext: CharacterContext = {
      level: character.level,
      className: character.class?.name ?? '',
      ancestryName: character.ancestry?.name ?? '',
      heritageName: character.heritage?.name,
      abilities: this.abilitiesToContextMap(character.abilities),
      skills: this.skillsToContextMap(character.skills),
      feats: new Set(character.feats.map(f => f.feat?.name).filter((n): n is string => !!n)),
    };

    const violations: Array<{ featId: string; featName: string; prereqText: string }> = [];
    for (const characterFeat of character.feats) {
      const featRecord = await this.prisma.feat.findUnique({ where: { id: characterFeat.featId } });
      if (!featRecord || !featRecord.prerequisites) continue;
      const result = evaluatePrereq(featRecord.prerequisites, characterContext);
      if (result.ok === false) {
        violations.push({
          featId: characterFeat.featId,
          featName: featRecord.name,
          prereqText: featRecord.prerequisites,
        });
      }
    }
    if (violations.length > 0) {
      await this.prisma.character.update({
        where: { id: character.id },
        data: { prereqViolations: { violations } },
      });
      this.logger.log(
        `PathbuilderImport: ${violations.length} prereq violations recorded for character ${character.name}`,
      );
    }
    ```

    **Step B — Auto-detect Free Archetype based on imported feats (D-09):**

    Add this block immediately after Step A:

    ```typescript
    // === Phase 1: Free Archetype auto-detect (D-09) ===
    // Heuristic per RESEARCH.md §Pattern 6:
    //  - count of Archetype-typed feats >= 2 → likely FA
    //  - OR any even level has 2+ Class-or-Archetype feats
    const archetypeFeatCount = character.feats.filter(f => f.source === 'ARCHETYPE').length;
    const evenLevelClassFeatCounts = new Map<number, number>();
    for (const f of character.feats) {
      if ((f.source === 'CLASS' || f.source === 'ARCHETYPE') && f.level && f.level % 2 === 0) {
        evenLevelClassFeatCounts.set(f.level, (evenLevelClassFeatCounts.get(f.level) ?? 0) + 1);
      }
    }
    const anyEvenLevelHasMultiple = Array.from(evenLevelClassFeatCounts.values()).some(c => c >= 2);
    const detectedFA = archetypeFeatCount >= 2 || anyEvenLevelHasMultiple;
    if (detectedFA) {
      await this.prisma.character.update({
        where: { id: character.id },
        data: { freeArchetype: true },
      });
      this.logger.log(
        `PathbuilderImport: detected FA=true for character ${character.name} ` +
        `based on ${archetypeFeatCount} archetype feats and ${evenLevelClassFeatCounts.size} even levels with multiple class feats`,
      );
    }
    ```

    **Add the import statement at the top of the file:**

    ```typescript
    import { evaluatePrereq } from '../leveling/lib/prereq-evaluator';
    import type { CharacterContext } from '../leveling/lib/types';
    ```

    **Helper methods** (add private methods to the service class for `abilitiesToContextMap` and `skillsToContextMap` — they convert from the Prisma row shape to the CharacterContext shape; executor implements per the actual schema fields).

    **Constraints:**
    - The new code must be additive: do NOT change any existing import logic.
    - If `evaluatePrereq` returns `{unknown: true}`, do NOT add it to violations (only `{ok: false}` are violations per D-06).
    - The FA detection is a heuristic — A1 in RESEARCH.md flags this as LOW confidence. Per D-09, the player can flip the toggle in character settings later.
    - Use NestJS `Logger` (already injected as `this.logger` if present; if not, add `private readonly logger = new Logger(PathbuilderImportService.name)`).
  </action>
  <verify>
    <automated>cd server &amp;&amp; grep -c "evaluatePrereq" src/modules/characters/pathbuilder-import.service.ts</automated>
  </verify>
  <acceptance_criteria>
    - File `server/src/modules/characters/pathbuilder-import.service.ts` contains the literal string `evaluatePrereq` (proves Plan 02 import)
    - File contains the literal string `prereqViolations` (proves D-06 persistence)
    - File contains the literal string `freeArchetype: true` (proves D-09 auto-detect)
    - File contains the literal string `detected FA=true` (log message proves observability)
    - Import statement `import { evaluatePrereq } from '../leveling/lib/prereq-evaluator'` present at top
    - Import statement `import type { CharacterContext } from '../leveling/lib/types'` present at top
    - File contains NO `: any` outside existing comments
    - `cd server && npm run build` exits 0
  </acceptance_criteria>
  <done>
    Pathbuilder import now writes Character.prereqViolations on D-06 violations and auto-sets Character.freeArchetype on D-09 FA detection. Logs both detections via NestJS Logger.
  </done>
</task>

</tasks>

<threat_model>
## Trust Boundaries

| Boundary | Description |
|----------|-------------|
| client → REST endpoints | Untrusted JSON crosses HTTP boundary at all 5 leveling endpoints. JWT auth + class-validator + service-level guards. |
| client → WebSocket | The new `level_up_committed` event is server-emit only — no inbound WebSocket handler. |
| LevelingService → DB | Atomic transaction crosses application/DB trust boundary. Partial unique index enforced at DB level for concurrency safety. |
| PathbuilderImportService → DB | Imports user-uploaded JSON; new evaluator + persist crosses to DB. |

## STRIDE Threat Register

| Threat ID | Category | Component | Disposition | Mitigation Plan |
|-----------|----------|-----------|-------------|-----------------|
| T-1-W3-01 | Spoofing | Player POSTs commit for someone else's character (forged characterId) | mitigate | All 5 endpoints call `checkCharacterAccess(characterId, userId, true)` — throws `ForbiddenException` if neither owner nor GM. Integration test 1-W3-10 covers. |
| T-1-W3-02 | Tampering | Player crafts a PATCH with 5 boost targets or non-applicable step's choices | mitigate | DTO `PatchLevelUpDto` rejects non-object shape; service `assertValidWizardChoices` does TS guard; commit-time `isValidBoostSet` check throws BadRequestException for invalid sets. |
| T-1-W3-03 | Tampering | Player commits a level beyond `currentLevel + 1` | mitigate | `commit()` validates `character.level + 1 === session.targetLevel`, throws BadRequestException otherwise. |
| T-1-W3-04 | Tampering | Race condition: two browser tabs both POST `/commit` for the same session | mitigate | Partial unique index on `(characterId) WHERE committedAt IS NULL` makes the second commit a no-op (the session has already been transitioned). Plus: `prisma.$transaction` is row-serialized; second tab sees `committedAt != null` and throws ConflictException. Integration test 1-W3-05 covers. |
| T-1-W3-05 | Tampering | WebSocket payload injection — player crafts a fake `level_up_committed` event | mitigate | Inbound WebSocket events are unaffected — `level_up_committed` is server-emit only. CharactersGateway has NO `@SubscribeMessage('level_up_committed')` handler. Other clients trust the event source = the room's server. |
| T-1-W3-06 | Information Disclosure | LevelUpHistory.snapshotBefore JSON contains character data; logs leak character names | mitigate | Per VALIDATION.md §Security, NestJS Logger output uses `characterId` not `name`; no full snapshot in logs. Snapshot lives only in DB. |
| T-1-W3-07 | Tampering | Stored XSS via German feat-prereq translation text rendered in the prereq-confirm dialog | mitigate | Translation text comes from existing `Translation.germanName` column populated from Claude API; React text-binding renders without `dangerouslySetInnerHTML`. Plan 05 (client) honors this contract. |
| T-1-W3-08 | EoP | Pathbuilder import auto-sets freeArchetype = true based on heuristic; could be exploited to gain extra slots | accept | Heuristic + LOW-confidence flag (A1 in RESEARCH.md); D-09 says player can flip the toggle in character settings. Self-hosted single-tenant — no adversarial player model. |
| T-1-W3-09 | Repudiation | Commit fails partway and Character is left half-mutated | mitigate | `prisma.$transaction` rolls back ALL writes on any failure (Pitfall #9). Integration test 1-W3-01 explicitly verifies rollback by injecting mid-tx error. |
</threat_model>

<verification>
After all tasks complete:

```bash
# Build clean
cd server && npm run build

# All leveling tests green (lib from Plan 02 + integration from Plan 04)
cd server && npm test -- --testPathPattern=leveling

# Type-check clean
cd server && npx tsc --noEmit -p tsconfig.json

# Smoke test the new endpoints (server must be running)
# Use Swagger UI at http://localhost:5000/api-docs to inspect:
#   POST /characters/:characterId/level-up
#   PATCH /characters/:characterId/level-up/:sessionId
#   GET /characters/:characterId/level-up/:sessionId/preview
#   POST /characters/:characterId/level-up/:sessionId/commit
#   DELETE /characters/:characterId/level-up/:sessionId

# Verify gateway extension
grep -c "level_up_committed" server/src/modules/characters/characters.gateway.ts  # ≥ 2

# Verify pathbuilder integration
grep -c "evaluatePrereq" server/src/modules/characters/pathbuilder-import.service.ts  # ≥ 1
grep -c "freeArchetype: true" server/src/modules/characters/pathbuilder-import.service.ts  # ≥ 1
```
</verification>

<success_criteria>
- LevelingModule exists with Controller, Service, FeatFilterService, 4 DTOs + barrel
- Module registered in app.module.ts; CharactersModule exports gateway+service for cross-module injection
- 5 REST endpoints fully wired with JWT auth, Swagger annotations, German error messages
- Atomic commit via prisma.$transaction with single broadcast at the end
- Character.hpCurrent NEVER appears in the update payload (Pitfall #9 enforced + tested)
- characters.gateway.ts CharacterUpdatePayload union extended with 'level_up_committed' + JSDoc payload contract
- pathbuilder-import.service.ts integrates prereq evaluator (D-06 violations) + FA auto-detect (D-09)
- All VALIDATION.md W3 rows (1-W3-01 through 1-W3-10) covered by integration tests
- Total leveling test count ≥ 60 (50 from Plan 02 lib + ≥10 here)
- `cd server && npm test -- --testPathPattern=leveling` green
- `cd server && npm run build` green
- `cd server && npx tsc --noEmit` green
</success_criteria>

<output>
After completion, create `.planning/phases/01-level-up-pf2e-regelkonform/01-04-SUMMARY.md` documenting:
- Final endpoint list with HTTP methods + paths (5 endpoints)
- Test results: total leveling test count, breakdown by spec file
- Confirmation that hpCurrent invariant test is green (Pitfall #9)
- Confirmation that broadcast-count test asserts exactly 1 (Pitfall #9 / RESEARCH First-Phase-Note)
- Notes on any deviations from the planned method bodies (e.g. spell-slot upsert keys differing from anticipated schema)
- Confirmation that pathbuilder import logs FA detection lines and writes prereqViolations
</output>
