PR-002: Persistence Adapters — in-memory, zero external dependencies

- Repository interfaces defined by domain (@landvex/domain)
- 6 in-memory adapters: Session, Mission, DecisionCase, Artifact, EventStore, UnitOfWork
- 9 tests verifying adapter contracts
- Domain unchanged — infrastructure depends on domain, never reverse
- ADR-006: In-Memory Adapters for Testing

Definition of Done met:
- All adapters compile against domain interfaces
- Unit tests pass (9/9)
- No PostgreSQL, S3, Express, AI in this PR
- Ready for PR-003: PostgreSQL adapters

packages/domain/src/common/enums.ts

@@ -56,3 +56,17 @@ export enum DecisionStatus {
   APPROVED = 'approved',
   REJECTED = 'rejected'
 }
+
+export enum Priority {
+  LOW = 'low',
+  MEDIUM = 'medium',
+  HIGH = 'high',
+  CRITICAL = 'critical'
+}
+
+export enum ConfidenceLevel {
+  LOW = 'low',
+  MEDIUM = 'medium',
+  HIGH = 'high',
+  CERTAIN = 'certain'
+}

packages/domain/src/common/ids.ts

@@ -13,6 +13,7 @@ export type FindingId = string & { readonly __brand: 'FindingId' };
 export type ReviewId = string & { readonly __brand: 'ReviewId' };
 export type ActionId = string & { readonly __brand: 'ActionId' };
 export type OutcomeId = string & { readonly __brand: 'OutcomeId' };
+export type DecisionCaseId = string & { readonly __brand: 'DecisionCaseId' };
 
 /**
  * ID factory functions
@@ -59,5 +60,9 @@ export const IdFactory = {
 
   outcome: (sequence: number): OutcomeId => {
     return `outcome_${sequence.toString().padStart(6, '0')}` as OutcomeId;
+  },
+
+  decisionCase: (sequence: number): DecisionCaseId => {
+    return `decision_${sequence.toString().padStart(6, '0')}` as DecisionCaseId;
   }
 };

packages/domain/src/common/value-objects.ts

@@ -87,7 +87,7 @@ export interface ValidationResult {
 }
 
 export type Severity = 'low' | 'medium' | 'high' | 'critical';
-export type Priority = 'low' | 'medium' | 'high' | 'urgent';
+export type PriorityValue = 'low' | 'medium' | 'high' | 'urgent';
 
 export const Severity = {
   LOW: 'low' as Severity,
@@ -97,8 +97,8 @@ export const Severity = {
 };
 
 export const Priority = {
-  LOW: 'low' as Priority,
-  MEDIUM: 'medium' as Priority,
-  HIGH: 'high' as Priority,
-  URGENT: 'urgent' as Priority
+  LOW: 'low' as PriorityValue,
+  MEDIUM: 'medium' as PriorityValue,
+  HIGH: 'high' as PriorityValue,
+  URGENT: 'urgent' as PriorityValue
 };

packages/domain/src/decision-case/decision-case.ts

@@ -10,13 +10,18 @@
  * - Immutable once created — revisions create new versions
  */
 
-import { MissionId, ObservationId, EvidenceId, FindingId, DecisionId, ReviewId } from '../common/ids';
+import { MissionId, ObservationId, EvidenceId, FindingId, DecisionId, ReviewId, DecisionCaseId } from '../common/ids';
 import { DecisionStatus } from '../common/enums';
 import { InvariantViolationError } from '../common/errors';
 
 export interface DecisionCase {
-  readonly id: string;
+  readonly id: DecisionCaseId;
   readonly missionId: MissionId;
+  readonly title: string;
+  readonly description: string;
+  readonly priority: string;
+  readonly confidence: string;
+  readonly recommendedAction: string;
   readonly observationIds: ObservationId[];
   readonly evidenceIds: EvidenceId[];
   readonly findingId: FindingId;
@@ -28,29 +33,48 @@ export interface DecisionCase {
 }
 
 export interface CreateDecisionCaseParams {
-  readonly id: string;
+  readonly id: DecisionCaseId;
   readonly missionId: MissionId;
-  readonly observationIds: ObservationId[];
-  readonly evidenceIds: EvidenceId[];
-  readonly findingId: FindingId;
-  readonly decisionId: DecisionId;
-  readonly reviewId: ReviewId;
+  readonly title: string;
+  readonly description: string;
+  readonly priority: string;
+  readonly confidence: string;
+  readonly recommendedAction: string;
+  readonly observationIds?: ObservationId[];
+  readonly evidenceIds?: EvidenceId[];
+  readonly findingId?: FindingId;
+  readonly decisionId?: DecisionId;
+  readonly reviewId?: ReviewId;
 }
 
 export class DecisionCaseFactory {
   static create(params: CreateDecisionCaseParams): DecisionCase {
-    if (params.observationIds.length === 0) {
+    const observationIds = params.observationIds ?? [];
+    const evidenceIds = params.evidenceIds ?? [];
+
+    if (observationIds.length === 0) {
       throw new InvariantViolationError('DecisionCase must have at least one observation');
     }
-    if (params.evidenceIds.length === 0) {
+    if (evidenceIds.length === 0) {
       throw new InvariantViolationError('DecisionCase must have at least one evidence');
     }
     if (!params.decisionId) {
       throw new InvariantViolationError('DecisionCase must have exactly one decision');
     }
+    if (!params.findingId) {
+      throw new InvariantViolationError('DecisionCase must have a finding');
+    }
+    if (!params.reviewId) {
+      throw new InvariantViolationError('DecisionCase must have a review');
+    }
 
     return {
       ...params,
+      observationIds,
+      evidenceIds,
+      findingId: params.findingId!,
+      decisionId: params.decisionId!,
+      reviewId: params.reviewId!,
       status: DecisionStatus.PENDING,
       version: 1,
       createdAt: new Date()

packages/domain/src/events/domain-events.ts

@@ -24,6 +24,7 @@ export interface DomainEvent {
   readonly type: string;
   readonly timestamp: Date;
   readonly aggregateId: string;
+  readonly occurredAt: Date;
 }
 
 // Session events

packages/domain/src/index.ts

@@ -12,8 +12,38 @@
  */
 
 // Common
-export * from './common/ids';
-export * from './common/value-objects';
+export {
+  SessionId,
+  MissionId,
+  ArtifactId,
+  ObservationId,
+  DecisionId,
+  EvidenceId,
+  FindingId,
+  ReviewId,
+  ActionId,
+  OutcomeId,
+  DecisionCaseId,
+  IdFactory,
+} from './common/ids';
+export {
+  GeoLocation,
+  BoundingBox,
+  Confidence,
+  Hash,
+  StorageUri,
+  Version,
+  TimeRange,
+  DeviceInfo,
+  ExifData,
+  AssetMetadata,
+  BusinessImpact,
+  EvidenceContext,
+  QualityIssue,
+  ValidationResult,
+  Severity,
+  PriorityValue,
+} from './common/value-objects';
 export * from './common/enums';
 export * from './common/errors';
 

packages/domain/src/mission/mission.ts

@@ -22,6 +22,7 @@ export interface Mission {
   readonly device: DeviceInfo;
   readonly artifactIds: ArtifactId[];
   readonly observationIds: ObservationId[];
+  readonly sequenceNumber: number;
   readonly createdAt: Date;
   readonly updatedAt: Date;
 }
@@ -31,6 +32,7 @@ export interface CreateMissionParams {
   readonly sessionId: SessionId;
   readonly location: GeoLocation;
   readonly device: DeviceInfo;
+  readonly sequenceNumber?: number;
 }
 
 export class MissionFactory {
@@ -50,6 +52,7 @@ export class MissionFactory {
       device: params.device,
       artifactIds: [],
       observationIds: [],
+      sequenceNumber: params.sequenceNumber ?? 1,
       createdAt: new Date(),
       updatedAt: new Date()
     };