/** Client-safe types re-exported from server modules (type-only imports are erased at build). */
export type { PolyModel, ProviderId, ModelCapabilities, ModelParameters, ModelPricing, ReasoningEffort, UnifiedGenerationSettings, Usage, PolyProviderErrorShape, PolyErrorCode } from "@/lib/ai/core/types";
export type { PublicConversation } from "@/lib/conversations/service";
export type { PublicMessage, StoredPart } from "@/lib/chat/service";
export type { PublicConnection } from "@/lib/providers/keys";
export type { GenerationSettingsInput, ChatRequestInput } from "@/lib/chat/schemas";
export type { ModelPreset, PromptPreset, Folder, UserPreferences, ArenaSession, ArenaResponse } from "@/db/schema";
export type { Project, ProjectFile, Prompt, CustomEndpoint, ArenaVote } from "@/db/schema-workspace";

export interface ModelsResponse {
  models: import("@/lib/ai/core/types").PolyModel[];
  favorites: string[];
  recents: string[];
  /** User labels per model key. */
  labels: Record<string, string>;
  connectedProviders: import("@/lib/ai/core/types").ProviderId[];
}

export interface ConversationsResponse {
  conversations: import("@/lib/conversations/service").PublicConversation[];
  nextCursor: string | null;
}

export interface ConversationDetail {
  conversation: import("@/lib/conversations/service").PublicConversation;
  messages: import("@/lib/chat/service").PublicMessage[];
}

/** Events emitted by POST /api/chat (SSE). */
export type ChatStreamEvent =
  | { type: "meta"; conversationId: string; isNewConversation: boolean; userMessage: import("@/lib/chat/service").PublicMessage | null; assistantMessageId: string; modelKey: string; clientId?: string }
  | { type: "text-delta"; text: string }
  | { type: "reasoning-delta"; text: string }
  | { type: "tool-start"; id: string; name: string }
  | { type: "tool-delta"; id: string; argumentsDelta: string }
  | { type: "tool-end"; id: string; name: string; arguments: Record<string, unknown>; argumentsText?: string }
  | { type: "tool-result"; id: string; name: string; result: unknown; isError: boolean; durationMs: number }
  | { type: "server-tool"; name: string; status: "started" | "completed"; data?: unknown }
  | { type: "citation"; citation: { url?: string; title?: string; snippet?: string } }
  | { type: "refusal"; category?: string | null; explanation?: string | null }
  | { type: "error"; error: import("@/lib/ai/core/types").PolyProviderErrorShape }
  | { type: "done"; message: import("@/lib/chat/service").PublicMessage; usage?: import("@/lib/ai/core/types").Usage; costUsd: number | null; latencyMs: number; ttftMs?: number; status: "complete" | "stopped" | "error"; title?: string; error?: import("@/lib/ai/core/types").PolyProviderErrorShape };

/** Extra fields the chat `meta` event carries since the 1.0 upgrade (workstream A). */
export interface ChatMetaExtras {
  /** Temporary chat — nothing persisted except the usage record; `conversationId` is the "ephemeral" sentinel. */
  ephemeral?: boolean;
  /** Server request id (X-Request-Id) for the error details sheet. */
  requestId?: string;
}
/** Diagnostics stored on a failed assistant message (see `lib/chat/service.ts` `StoredMessageError`). */
export type { StoredMessageError } from "@/lib/chat/service";
/** Response of POST /api/chat/adopt. */
export interface ChatAdoptResponse {
  conversation: import("@/lib/conversations/service").PublicConversation;
  userMessage: import("@/lib/chat/service").PublicMessage | null;
  message: import("@/lib/chat/service").PublicMessage;
  isNewConversation: boolean;
}

/** Workspace (Projects / Library / Prompt library) public shapes — appended by the Projects workstream. */
export type { PublicProject, ProjectDetail } from "@/lib/projects/service";
export type { PublicProjectFile, PendingAttachment } from "@/lib/library/service";
export type { PublicPrompt, PromptKind, UsePromptResult } from "@/lib/prompts/service";
export type { PromptVariable } from "@/lib/prompts/variables";

// --- Search / share / export (workstream G) -------------------------------------------------------
export type { SearchResponse, SearchGroup, SearchConversationHit, SearchMessageHit, SearchModelHit, SearchPromptHit, SearchProjectHit, SearchPresetHit } from "@/lib/search/service";
export type { ShareLinkItem, ExportFormat, ShareSnapshotMeta } from "@/lib/conversations/service";
export type { ParsedQuery, FilterToken, FilterKey } from "@/lib/search/query";

// --- Usage analytics, providers, custom endpoints (workstream E) ------------------------------
export type { PublicEndpoint, EndpointInput, EndpointPatch, EndpointProbeResult } from "@/lib/endpoints/service";
export type { ManualModel } from "@/lib/ai/providers/custom";
export type { UsageSummary, UsageKpis, UsageSeriesPoint, ProviderAgg, ModelAgg, UsageProjection, RecentRecord } from "@/lib/usage/service";
export type { SavingsOpportunity } from "@/lib/usage/savings";