feat: Complete Pi Harness Rebuild - Phases 1 till 7.2

src/workspaces/apps/Chat/MessageBubble.tsx

@@ -1,7 +1,7 @@
 import ReactMarkdown from 'react-markdown';
 import remarkGfm from 'remark-gfm';
 import rehypeRaw from 'rehype-raw';
-import type { ChatMessage } from './types';
+import type { LegacyChatMessage } from './types';
 import { ToolActivity } from './ToolActivity';
 import { QuestionActivity } from './QuestionActivity';
 
@@ -21,7 +21,7 @@ const CollapsibleBlock = ({ label, content }: { label: string; content: string }
 );
 
 type MessageBubbleProps = {
-  message: ChatMessage;
+  message: LegacyChatMessage;
   onAnswer?: (text: string) => void;
 };
 

src/workspaces/apps/Chat/MessageList.tsx

@@ -1,10 +1,10 @@
 import type { RefObject } from 'react';
 import { ArrowDown } from 'lucide-react';
-import type { ChatMessage } from './types';
+import type { LegacyChatMessage } from './types';
 import { MessageBubble, StreamingBubble } from './MessageBubble';
 
 type MessageListProps = {
-  messages: ChatMessage[];
+  messages: LegacyChatMessage[];
   streamingText: string;
   isGenerating: boolean;
   showJumpToBottom: boolean;

src/workspaces/apps/Chat/QuestionActivity.tsx

@@ -1,8 +1,8 @@
 import { useState } from 'react';
 import { MessageCircleQuestion, Check } from 'lucide-react';
-import type { ChatMessage } from './types';
+import type { LegacyChatMessage } from './types';
 
-type ToolMessage = Extract<ChatMessage, { role: 'tool' }>;
+type ToolMessage = Extract<LegacyChatMessage, { role: 'tool' }>;
 
 type QuestionOption = {
   label: string;

src/workspaces/apps/Chat/ToolActivity.tsx

@@ -1,8 +1,8 @@
 import { useState } from 'react';
 import { FileText, Terminal, Pencil, Search, Globe, Wrench, ChevronRight } from 'lucide-react';
-import type { ChatMessage } from './types';
+import type { LegacyChatMessage } from './types';
 
-type ToolMessage = Extract<ChatMessage, { role: 'tool' }>;
+type ToolMessage = Extract<LegacyChatMessage, { role: 'tool' }>;
 
 type ToolActivityProps = {
   message: ToolMessage;

src/workspaces/apps/Chat/index.ts

@@ -2,4 +2,16 @@ export { MessageList } from './MessageList';
 export { MessageBubble, StreamingBubble } from './MessageBubble';
 export { ToolActivity } from './ToolActivity';
 export { QuestionActivity } from './QuestionActivity';
-export type { ChatMessage, SessionEntry, ServerMessage, TaskInfo } from './types';
+
+export type {
+  ChatMessage,
+  SessionEntry,
+  GroupEntry,
+  ServerMessage,
+  Message,
+  MessageCost,
+  TaskInfo,
+  LegacyChatMessage,
+  LegacySessionEntry,
+  LegacyServerMessage,
+} from './types';

src/workspaces/apps/Chat/types.ts

@@ -1,4 +1,82 @@
+export type MessageCost = {
+  inputTokens: number;
+  outputTokens: number;
+  totalUSD: number;
+};
+
 export type SessionEntry = {
+  id: string;
+  title: string;
+  model: string;
+  cwd: string;
+  createdAt: number;
+  updatedAt: number;
+  messageCount: number;
+  cost: MessageCost;
+  groupSlug?: string | null;
+};
+
+export type GroupEntry = {
+  name: string;
+  slug: string;
+  description?: string;
+  createdAt: number;
+  updatedAt: number;
+  sessionCount: number;
+};
+
+export type ChatMessage =
+  | { role: 'user'; text: string; images?: { filename: string; dataUrl: string }[] }
+  | { role: 'assistant'; text: string }
+  | { role: 'system'; text: string }
+  | {
+      role: 'tool';
+      toolName: string;
+      toolInput: Record<string, unknown>;
+      toolCallId: string;
+      output?: string;
+      isError?: boolean;
+    }
+  | { role: 'result'; cost: MessageCost }
+  | { role: 'error'; text: string };
+
+export type TaskInfo = {
+  taskName: string;
+  taskDirName: string;
+  entryName: string;
+  entryType: 'file' | 'directory';
+};
+
+export type ServerMessage =
+  | { type: 'session:init'; sessionId: string; model: string; cwd: string }
+  | { type: 'assistant:text'; text: string }
+  | { type: 'assistant:delta'; text: string }
+  | { type: 'tool:start'; toolCallId: string; toolName: string; toolInput: Record<string, unknown> }
+  | { type: 'tool:result'; toolCallId: string; output: string; isError: boolean }
+  | { type: 'result'; sessionId: string; cost: MessageCost }
+  | { type: 'sync:messages'; sessionId: string; messages: Message[]; isGenerating: boolean; streamingText: string }
+  | { type: 'error'; message: string; errorCode?: string }
+  | { type: 'stopped' };
+
+export type Message = {
+  id: string;
+  timestamp: number;
+  role: 'user' | 'assistant' | 'tool';
+  text?: string;
+  model?: string;
+  cost?: MessageCost;
+  toolCallId?: string;
+  toolName?: string;
+  toolInput?: Record<string, unknown>;
+  output?: string;
+  isError?: boolean;
+};
+
+// Legacy type aliases for backward compatibility during migration
+// TODO: Remove after Phase 9 cleanup
+
+/** @deprecated Use SessionEntry instead */
+export type LegacySessionEntry = {
   id: string;
   title: string;
   createdAt: number;
@@ -6,7 +84,8 @@ export type SessionEntry = {
   model?: string | null;
 };
 
-export type ChatMessage =
+/** @deprecated Use ChatMessage with toolCallId instead */
+export type LegacyChatMessage =
   | { role: 'user'; text: string; images?: { filename: string; dataUrl: string }[] }
   | { role: 'assistant'; text: string }
   | { role: 'system'; text: string }
@@ -21,14 +100,8 @@ export type ChatMessage =
   | { role: 'result'; costUsd: number; durationMs: number; numTurns: number; isError: boolean }
   | { role: 'error'; text: string };
 
-export type TaskInfo = {
-  taskName: string;
-  taskDirName: string;
-  entryName: string;
-  entryType: 'file' | 'directory';
-};
-
-export type ServerMessage =
+/** @deprecated Use ServerMessage instead */
+export type LegacyServerMessage =
   | { type: 'session:init'; sessionId: string; model: string | null }
   | { type: 'system:prompt'; text: string }
   | { type: 'assistant:text'; text: string }
@@ -38,4 +111,4 @@ export type ServerMessage =
   | { type: 'result'; costUsd: number; durationMs: number; numTurns: number; isError: boolean }
   | { type: 'error'; message: string }
   | { type: 'stopped' }
-  | { type: 'messages:sync'; messages: ChatMessage[]; streamingText: string; isGenerating: boolean };
+  | { type: 'messages:sync'; messages: LegacyChatMessage[]; streamingText: string; isGenerating: boolean };

src/workspaces/config/src/index.ts

@@ -1,14 +1,14 @@
 export const config = {
-  AUTH_URL: '/api/auth',
-  API_URL: '/api',
-  GAN_URL: '/api/gan',
-  STATISTICS_URL: '/api/statistics',
-  FILES_URL: '/api/files',
-  WS_URL: '/api/ws',
-  BILLING_URL: '/api/billing',
-  EXPERIMENTS_URL: '/api/experiments',
-  TRACKING_URL: '/api/tracking',
-  BUILD_ENV: 'development',
-  ENV: 'development',
-  GOOGLE_AUTH_CLIENT_ID: '306475690020-b6j9ml8puphfi8261g7jv3hgsc1vc3l7.apps.googleusercontent.com',
+  AUTH_URL: '',
+  API_URL: '',
+  GAN_URL: '',
+  STATISTICS_URL: '',
+  FILES_URL: '',
+  WS_URL: '',
+  BILLING_URL: '',
+  EXPERIMENTS_URL: '',
+  TRACKING_URL: '',
+  BUILD_ENV: '',
+  ENV: '',
+  GOOGLE_AUTH_CLIENT_ID: '',
 };