feat: foundation — Docker Compose, OTEL, shared types (P0-002, P0-005, P0-006)

Docker Compose (P0-005):
- PG 17 + pgvector, Valkey 8, OTEL Collector, Jaeger
- OTEL Collector config with trace/metric/log pipelines
- .env.example with all connection strings

OTEL Foundation (P0-006):
- @opentelemetry/sdk-node with auto-instrumentations
- tracing.ts loaded before NestJS bootstrap
- OTLP HTTP exporter → collector → Jaeger
- Disabled fs/dns instrumentations (noisy)

Shared Types (P0-002):
- ChatMessageDto with class-validator (IsUUID, IsNotEmpty, MaxLength)
- ChatResponseDto for REST responses
- Socket.IO typed event maps (ServerToClientEvents, ClientToServerEvents)
- AgentSessionHandle opaque type
- All event payload interfaces shared across gateway/cli/discord

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/types/package.json

@@ -18,5 +18,9 @@
   "devDependencies": {
     "typescript": "^5.8.0",
     "vitest": "^2.0.0"
+  },
+  "dependencies": {
+    "class-transformer": "^0.5.1",
+    "class-validator": "^0.15.1"
   }
 }

packages/types/src/agent/index.ts

@@ -0,0 +1,4 @@
+/** Opaque handle for agent sessions — callers should not access internals */
+export interface AgentSessionHandle {
+  readonly id: string;
+}

packages/types/src/chat/chat.dto.ts

@@ -0,0 +1,17 @@
+import { IsString, IsNotEmpty, IsOptional, IsUUID, MaxLength } from 'class-validator';
+
+export class ChatMessageDto {
+  @IsOptional()
+  @IsUUID(4)
+  conversationId?: string;
+
+  @IsString()
+  @IsNotEmpty()
+  @MaxLength(32_000)
+  content!: string;
+}
+
+export class ChatResponseDto {
+  conversationId!: string;
+  text!: string;
+}

packages/types/src/chat/events.ts

@@ -0,0 +1,62 @@
+export interface MessageAckPayload {
+  conversationId: string;
+  messageId: string;
+}
+
+export interface AgentStartPayload {
+  conversationId: string;
+}
+
+export interface AgentEndPayload {
+  conversationId: string;
+}
+
+export interface AgentTextPayload {
+  conversationId: string;
+  text: string;
+}
+
+export interface AgentThinkingPayload {
+  conversationId: string;
+  text: string;
+}
+
+export interface ToolStartPayload {
+  conversationId: string;
+  toolCallId: string;
+  toolName: string;
+}
+
+export interface ToolEndPayload {
+  conversationId: string;
+  toolCallId: string;
+  toolName: string;
+  isError: boolean;
+}
+
+export interface ErrorPayload {
+  conversationId: string;
+  error: string;
+}
+
+export interface ChatMessagePayload {
+  conversationId?: string;
+  content: string;
+}
+
+/** Socket.IO typed event map: server → client */
+export interface ServerToClientEvents {
+  'message:ack': (payload: MessageAckPayload) => void;
+  'agent:start': (payload: AgentStartPayload) => void;
+  'agent:end': (payload: AgentEndPayload) => void;
+  'agent:text': (payload: AgentTextPayload) => void;
+  'agent:thinking': (payload: AgentThinkingPayload) => void;
+  'agent:tool:start': (payload: ToolStartPayload) => void;
+  'agent:tool:end': (payload: ToolEndPayload) => void;
+  error: (payload: ErrorPayload) => void;
+}
+
+/** Socket.IO typed event map: client → server */
+export interface ClientToServerEvents {
+  message: (data: ChatMessagePayload) => void;
+}

packages/types/src/chat/index.ts

@@ -0,0 +1,14 @@
+export { ChatMessageDto, ChatResponseDto } from './chat.dto.js';
+export type {
+  MessageAckPayload,
+  AgentStartPayload,
+  AgentEndPayload,
+  AgentTextPayload,
+  AgentThinkingPayload,
+  ToolStartPayload,
+  ToolEndPayload,
+  ErrorPayload,
+  ChatMessagePayload,
+  ServerToClientEvents,
+  ClientToServerEvents,
+} from './events.js';

packages/types/src/index.ts

@@ -1 +1,4 @@
 export const VERSION = '0.0.0';
+
+export * from './chat/index.js';
+export * from './agent/index.js';

packages/types/tsconfig.json

@@ -2,7 +2,9 @@
   "extends": "../../tsconfig.base.json",
   "compilerOptions": {
     "outDir": "dist",
-    "rootDir": "src"
+    "rootDir": "src",
+    "experimentalDecorators": true,
+    "emitDecoratorMetadata": true
   },
   "include": ["src/**/*"],
   "exclude": ["node_modules", "dist"]