feat: separate frontend and backend services

pi-web/lib/pi-types.ts

@@ -1,10 +1,7 @@
-import type {
-  AgentSessionEvent,
-  SessionManager,
-  SettingsManager,
-  SlashCommandInfo,
-  Theme,
-} from "@earendil-works/pi-coding-agent";
+// Frontend-only subset of the pi type surface. The full AgentSessionLike
+// contract (which references pi-coding-agent classes) lives in the backend
+// (server/src/lib/pi-types.ts); the UI only renders session stats reported
+// over HTTP, so this file must not import the pi packages.
 
 export interface ContextUsage {
   percent: number | null;
@@ -12,22 +9,6 @@ export interface ContextUsage {
   tokens: number | null;
 }
 
-export interface ModelLike {
-  id: string;
-  provider: string;
-}
-
-export interface ToolInfo {
-  name: string;
-  description: string;
-}
-
-export interface NavigateTreeResult {
-  editorText?: string;
-  cancelled: boolean;
-  aborted?: boolean;
-}
-
 export interface SessionStatsInfo {
   sessionFile?: string;
   sessionId: string;
@@ -47,121 +28,3 @@ export interface SessionStatsInfo {
   cost: number;
   contextUsage?: ContextUsage;
 }
-
-interface PromptTemplateLike {
-  name: string;
-  description?: string;
-  sourceInfo: SlashCommandInfo["sourceInfo"];
-}
-
-interface SkillLike {
-  name: string;
-  description?: string;
-  sourceInfo: SlashCommandInfo["sourceInfo"];
-}
-
-interface ResourceLoaderLike {
-  getSkills(): { skills: SkillLike[] };
-}
-
-interface ExtensionRunnerLike {
-  getRegisteredCommands(): Array<{
-    invocationName: string;
-    description?: string;
-    sourceInfo: SlashCommandInfo["sourceInfo"];
-  }>;
-  setUIContext?(uiContext?: unknown, mode?: "tui" | "rpc" | "json" | "print"): void;
-}
-
-type DialogOptionsLike = {
-  signal?: AbortSignal;
-  timeout?: number;
-};
-
-type WidgetOptionsLike = {
-  placement?: "aboveEditor" | "belowEditor";
-};
-
-export interface ExtensionUiContextLike {
-  select(title: string, options: string[], opts?: DialogOptionsLike): Promise<string | undefined>;
-  confirm(title: string, message: string, opts?: DialogOptionsLike): Promise<boolean>;
-  input(title: string, placeholder?: string, opts?: DialogOptionsLike): Promise<string | undefined>;
-  editor(title: string, prefill?: string, opts?: DialogOptionsLike): Promise<string | undefined>;
-  notify(message: string, type?: "info" | "warning" | "error"): void;
-  onTerminalInput(): () => void;
-  setStatus(key: string, text: string | undefined): void;
-  setWorkingMessage(message?: string): void;
-  setWorkingVisible(visible: boolean): void;
-  setWorkingIndicator(options?: { frames?: string[]; intervalMs?: number }): void;
-  setHiddenThinkingLabel(label?: string): void;
-  setWidget(key: string, content: string[] | ((...args: never[]) => unknown) | undefined, options?: WidgetOptionsLike): void;
-  setFooter(factory: unknown): void;
-  setHeader(factory: unknown): void;
-  setTitle(title: string): void;
-  custom<T = unknown>(...args: unknown[]): Promise<T>;
-  pasteToEditor(text: string): void;
-  setEditorText(text: string): void;
-  getEditorText(): string;
-  addAutocompleteProvider(): void;
-  setEditorComponent(): void;
-  getEditorComponent(): undefined;
-  readonly theme: Theme;
-  getAllThemes(): unknown[];
-  getTheme(name: string): undefined;
-  setTheme(theme: unknown): { success: boolean; error?: string };
-  getToolsExpanded(): boolean;
-  setToolsExpanded(expanded: boolean): void;
-}
-
-export interface AgentSessionLike {
-  readonly sessionId: string;
-  readonly sessionFile: string | undefined;
-  readonly isStreaming: boolean;
-  readonly isCompacting: boolean;
-  readonly autoCompactionEnabled: boolean;
-  readonly autoRetryEnabled: boolean;
-  readonly model: ModelLike | undefined;
-  readonly modelRuntime: {
-    getModel: (provider: string, modelId: string) => ModelLike | undefined;
-    refresh: (options?: { allowNetwork?: boolean }) => Promise<unknown>;
-  };
-  readonly sessionManager: SessionManager;
-  readonly settingsManager: SettingsManager;
-  readonly agent: { state?: { systemPrompt?: string; thinkingLevel?: string } };
-  readonly extensionRunner: ExtensionRunnerLike;
-  readonly promptTemplates: readonly PromptTemplateLike[];
-  readonly resourceLoader: ResourceLoaderLike;
-
-  readonly bindExtensions?: unknown;
-  reload(options?: { beforeSessionStart?: () => void | Promise<void> }): Promise<void>;
-  subscribe(listener: (event: AgentSessionEvent) => void): () => void;
-  prompt(text: string, options?: {
-    images?: Array<{ type: "image"; data: string; mimeType: string }>;
-    streamingBehavior?: "steer" | "followUp";
-    source?: "interactive" | "rpc";
-  }): Promise<void>;
-  abort(): Promise<void>;
-  executeBash(command: string, onChunk?: (chunk: string) => void, options?: { excludeFromContext?: boolean }): Promise<{ output: string; exitCode?: number; cancelled?: boolean; truncated?: boolean; fullOutputPath?: string }>;
-  abortBash(): void;
-  readonly isBashRunning: boolean;
-  setModel(model: ModelLike): Promise<void>;
-  navigateTree(targetId: string, options?: { summarize?: boolean }): Promise<NavigateTreeResult>;
-  setThinkingLevel(level: string): void;
-  compact(customInstructions?: string): Promise<unknown>;
-  setSessionName(name: string): void;
-  getSessionStats(): Omit<SessionStatsInfo, "sessionName">;
-  getLastAssistantText(): string | undefined;
-  setAutoCompactionEnabled(enabled: boolean): void;
-  setAutoRetryEnabled(enabled: boolean): void;
-  steer(text: string, images?: Array<{ type: "image"; data: string; mimeType: string }>): Promise<void>;
-  followUp(text: string, images?: Array<{ type: "image"; data: string; mimeType: string }>): Promise<void>;
-  readonly pendingMessageCount: number;
-  getSteeringMessages(): readonly string[];
-  getFollowUpMessages(): readonly string[];
-  clearQueue(): { steering: string[]; followUp: string[] };
-  getAllTools(): ToolInfo[];
-  getActiveToolNames(): string[];
-  setActiveToolsByName(names: string[]): void;
-  abortCompaction(): void;
-  getContextUsage(): ContextUsage | undefined;
-}