import {  ApprovalRequestId,  isToolLifecycleItemType,  type OrchestrationLatestTurn,  type OrchestrationThreadActivity,  type OrchestrationProposedPlanId,  type ProviderKind,  type ToolLifecycleItemType,  type UserInputQuestion,  type ThreadId,  type TurnId,} from "@t3tools/contracts"; import type {  ChatMessage,  ProposedPlan,  SessionPhase,  Thread,  ThreadSession,  TurnDiffSummary,} from "./types"; export type ProviderPickerKind = ProviderKind | "cursor"; export const PROVIDER_OPTIONS: Array<{  value: ProviderPickerKind;  label: string;  available: boolean;}> = [  { value: "codex", label: "Codex", available: true },  { value: "claudeAgent", label: "Claude", available: true },  { value: "cursor", label: "Cursor", available: false },]; export interface WorkLogEntry {  id: string;  createdAt: string;  label: string;  detail?: string;  command?: string;  rawCommand?: string;  changedFiles?: ReadonlyArray<string>;  tone: "thinking" | "tool" | "info" | "error";  toolTitle?: string;  itemType?: ToolLifecycleItemType;  requestKind?: PendingApproval["requestKind"];} interface DerivedWorkLogEntry extends WorkLogEntry {  activityKind: OrchestrationThreadActivity["kind"];  collapseKey?: string;} export interface PendingApproval {  requestId: ApprovalRequestId;  requestKind: "command" | "file-read" | "file-change";  createdAt: string;  detail?: string;} export interface PendingUserInput {  requestId: ApprovalRequestId;  createdAt: string;  questions: ReadonlyArray<UserInputQuestion>;} export interface ActivePlanState {  createdAt: string;  turnId: TurnId | null;  explanation?: string | null;  steps: Array<{    step: string;    status: "pending" | "inProgress" | "completed";  }>;} export interface LatestProposedPlanState {  id: OrchestrationProposedPlanId;  createdAt: string;  updatedAt: string;  turnId: TurnId | null;  planMarkdown: string;  implementedAt: string | null;  implementationThreadId: ThreadId | null;} export type TimelineEntry =  | {      id: string;      kind: "message";      createdAt: string;      message: ChatMessage;    }  | {      id: string;      kind: "proposed-plan";      createdAt: string;      proposedPlan: ProposedPlan;    }  | {      id: string;      kind: "work";      createdAt: string;      entry: WorkLogEntry;    }; export function formatDuration(durationMs: number): string {  if (!Number.isFinite(durationMs) || durationMs < 0) return "0ms";  if (durationMs < 1_000) return `${Math.max(1, Math.round(durationMs))}ms`;  if (durationMs < 10_000) return `${(durationMs / 1_000).toFixed(1)}s`;  if (durationMs < 60_000) return `${Math.round(durationMs / 1_000)}s`;  const minutes = Math.floor(durationMs / 60_000);  const seconds = Math.round((durationMs % 60_000) / 1_000);  if (seconds === 0) return `${minutes}m`;  if (seconds === 60) return `${minutes + 1}m`;  return `${minutes}m ${seconds}s`;} export function formatElapsed(startIso: string, endIso: string | undefined): string | null {  if (!endIso) return null;  const startedAt = Date.parse(startIso);  const endedAt = Date.parse(endIso);  if (Number.isNaN(startedAt) || Number.isNaN(endedAt) || endedAt < startedAt) {    return null;  }  return formatDuration(endedAt - startedAt);} type LatestTurnTiming = Pick<OrchestrationLatestTurn, "turnId" | "startedAt" | "completedAt">;type SessionActivityState = Pick<ThreadSession, "orchestrationStatus" | "activeTurnId">; export function isLatestTurnSettled(  latestTurn: LatestTurnTiming | null,  session: SessionActivityState | null,): boolean {  if (!latestTurn?.startedAt) return false;  if (!latestTurn.completedAt) return false;  if (!session) return true;  if (session.orchestrationStatus === "running") return false;  return true;} export function deriveActiveWorkStartedAt(  latestTurn: LatestTurnTiming | null,  session: SessionActivityState | null,  sendStartedAt: string | null,): string | null {  if (!isLatestTurnSettled(latestTurn, session)) {    return latestTurn?.startedAt ?? sendStartedAt;  }  return sendStartedAt;} function requestKindFromRequestType(requestType: unknown): PendingApproval["requestKind"] | null {  switch (requestType) {    case "command_execution_approval":    case "exec_command_approval":      return "command";    case "file_read_approval":      return "file-read";    case "file_change_approval":    case "apply_patch_approval":      return "file-change";    default:      return null;  }} function isStalePendingRequestFailureDetail(detail: string | undefined): boolean {  const normalized = detail?.toLowerCase();  if (!normalized) {    return false;  }  return (    normalized.includes("stale pending approval request") ||    normalized.includes("stale pending user-input request") ||    normalized.includes("unknown pending approval request") ||    normalized.includes("unknown pending permission request") ||    normalized.includes("unknown pending user-input request")  );} export function derivePendingApprovals(  activities: ReadonlyArray<OrchestrationThreadActivity>,): PendingApproval[] {  const openByRequestId = new Map<ApprovalRequestId, PendingApproval>();  const ordered = [...activities].toSorted(compareActivitiesByOrder);   for (const activity of ordered) {    const payload =      activity.payload && typeof activity.payload === "object"        ? (activity.payload as Record<string, unknown>)        : null;    const requestId =      payload && typeof payload.requestId === "string"        ? ApprovalRequestId.makeUnsafe(payload.requestId)        : null;    const requestKind =      payload &&      (payload.requestKind === "command" ||        payload.requestKind === "file-read" ||        payload.requestKind === "file-change")        ? payload.requestKind        : payload          ? requestKindFromRequestType(payload.requestType)          : null;    const detail = payload && typeof payload.detail === "string" ? payload.detail : undefined;     if (activity.kind === "approval.requested" && requestId && requestKind) {      openByRequestId.set(requestId, {        requestId,        requestKind,        createdAt: activity.createdAt,        ...(detail ? { detail } : {}),      });      continue;    }     if (activity.kind === "approval.resolved" && requestId) {      openByRequestId.delete(requestId);      continue;    }     if (      activity.kind === "provider.approval.respond.failed" &&      requestId &&      isStalePendingRequestFailureDetail(detail)    ) {      openByRequestId.delete(requestId);      continue;    }  }   return [...openByRequestId.values()].toSorted((left, right) =>    left.createdAt.localeCompare(right.createdAt),  );} function parseUserInputQuestions(  payload: Record<string, unknown> | null,): ReadonlyArray<UserInputQuestion> | null {  const questions = payload?.questions;  if (!Array.isArray(questions)) {    return null;  }  const parsed = questions    .map<UserInputQuestion | null>((entry) => {      if (!entry || typeof entry !== "object") return null;      const question = entry as Record<string, unknown>;      if (        typeof question.id !== "string" ||        typeof question.header !== "string" ||        typeof question.question !== "string" ||        !Array.isArray(question.options)      ) {        return null;      }      const options = question.options        .map<UserInputQuestion["options"][number] | null>((option) => {          if (!option || typeof option !== "object") return null;          const optionRecord = option as Record<string, unknown>;          if (            typeof optionRecord.label !== "string" ||            typeof optionRecord.description !== "string"          ) {            return null;          }          return {            label: optionRecord.label,            description: optionRecord.description,          };        })        .filter((option): option is UserInputQuestion["options"][number] => option !== null);      if (options.length === 0) {        return null;      }      return {        id: question.id,        header: question.header,        question: question.question,        options,      };    })    .filter((question): question is UserInputQuestion => question !== null);  return parsed.length > 0 ? parsed : null;} export function derivePendingUserInputs(  activities: ReadonlyArray<OrchestrationThreadActivity>,): PendingUserInput[] {  const openByRequestId = new Map<ApprovalRequestId, PendingUserInput>();  const ordered = [...activities].toSorted(compareActivitiesByOrder);   for (const activity of ordered) {    const payload =      activity.payload && typeof activity.payload === "object"        ? (activity.payload as Record<string, unknown>)        : null;    const requestId =      payload && typeof payload.requestId === "string"        ? ApprovalRequestId.makeUnsafe(payload.requestId)        : null;    const detail = payload && typeof payload.detail === "string" ? payload.detail : undefined;     if (activity.kind === "user-input.requested" && requestId) {      const questions = parseUserInputQuestions(payload);      if (!questions) {        continue;      }      openByRequestId.set(requestId, {        requestId,        createdAt: activity.createdAt,        questions,      });      continue;    }     if (activity.kind === "user-input.resolved" && requestId) {      openByRequestId.delete(requestId);      continue;    }     if (      activity.kind === "provider.user-input.respond.failed" &&      requestId &&      isStalePendingRequestFailureDetail(detail)    ) {      openByRequestId.delete(requestId);    }  }   return [...openByRequestId.values()].toSorted((left, right) =>    left.createdAt.localeCompare(right.createdAt),  );} export function deriveActivePlanState(  activities: ReadonlyArray<OrchestrationThreadActivity>,  latestTurnId: TurnId | undefined,): ActivePlanState | null {  const ordered = [...activities].toSorted(compareActivitiesByOrder);  const candidates = ordered.filter((activity) => {    if (activity.kind !== "turn.plan.updated") {      return false;    }    if (!latestTurnId) {      return true;    }    return activity.turnId === latestTurnId;  });  const latest = candidates.at(-1);  if (!latest) {    return null;  }  const payload =    latest.payload && typeof latest.payload === "object"      ? (latest.payload as Record<string, unknown>)      : null;  const rawPlan = payload?.plan;  if (!Array.isArray(rawPlan)) {    return null;  }  const steps = rawPlan    .map((entry) => {      if (!entry || typeof entry !== "object") return null;      const record = entry as Record<string, unknown>;      if (typeof record.step !== "string") {        return null;      }      const status =        record.status === "completed" || record.status === "inProgress" ? record.status : "pending";      return {        step: record.step,        status,      };    })    .filter(      (        step,      ): step is {        step: string;        status: "pending" | "inProgress" | "completed";      } => step !== null,    );  if (steps.length === 0) {    return null;  }  return {    createdAt: latest.createdAt,    turnId: latest.turnId,    ...(payload && "explanation" in payload      ? { explanation: payload.explanation as string | null }      : {}),    steps,  };} export function findLatestProposedPlan(  proposedPlans: ReadonlyArray<ProposedPlan>,  latestTurnId: TurnId | string | null | undefined,): LatestProposedPlanState | null {  if (latestTurnId) {    const matchingTurnPlan = [...proposedPlans]      .filter((proposedPlan) => proposedPlan.turnId === latestTurnId)      .toSorted(        (left, right) =>          left.updatedAt.localeCompare(right.updatedAt) || left.id.localeCompare(right.id),      )      .at(-1);    if (matchingTurnPlan) {      return toLatestProposedPlanState(matchingTurnPlan);    }  }   const latestPlan = [...proposedPlans]    .toSorted(      (left, right) =>        left.updatedAt.localeCompare(right.updatedAt) || left.id.localeCompare(right.id),    )    .at(-1);  if (!latestPlan) {    return null;  }   return toLatestProposedPlanState(latestPlan);} export function findSidebarProposedPlan(input: {  threads: ReadonlyArray<Pick<Thread, "id" | "proposedPlans">>;  latestTurn: Pick<OrchestrationLatestTurn, "turnId" | "sourceProposedPlan"> | null;  latestTurnSettled: boolean;  threadId: ThreadId | string | null | undefined;}): LatestProposedPlanState | null {  const activeThreadPlans =    input.threads.find((thread) => thread.id === input.threadId)?.proposedPlans ?? [];   if (!input.latestTurnSettled) {    const sourceProposedPlan = input.latestTurn?.sourceProposedPlan;    if (sourceProposedPlan) {      const sourcePlan = input.threads        .find((thread) => thread.id === sourceProposedPlan.threadId)        ?.proposedPlans.find((plan) => plan.id === sourceProposedPlan.planId);      if (sourcePlan) {        return toLatestProposedPlanState(sourcePlan);      }    }  }   return findLatestProposedPlan(activeThreadPlans, input.latestTurn?.turnId ?? null);} export function hasActionableProposedPlan(  proposedPlan: LatestProposedPlanState | Pick<ProposedPlan, "implementedAt"> | null,): boolean {  return proposedPlan !== null && proposedPlan.implementedAt === null;} export function deriveWorkLogEntries(  activities: ReadonlyArray<OrchestrationThreadActivity>,  latestTurnId: TurnId | undefined,): WorkLogEntry[] {  const ordered = [...activities].toSorted(compareActivitiesByOrder);  const entries = ordered    .filter((activity) => (latestTurnId ? activity.turnId === latestTurnId : true))    .filter((activity) => activity.kind !== "tool.started")    .filter((activity) => activity.kind !== "task.started" && activity.kind !== "task.completed")    .filter((activity) => activity.kind !== "context-window.updated")    .filter((activity) => activity.summary !== "Checkpoint captured")    .filter((activity) => !isPlanBoundaryToolActivity(activity))    .map(toDerivedWorkLogEntry);  return collapseDerivedWorkLogEntries(entries).map(    ({ activityKind: _activityKind, collapseKey: _collapseKey, ...entry }) => entry,  );} function isPlanBoundaryToolActivity(activity: OrchestrationThreadActivity): boolean {  if (activity.kind !== "tool.updated" && activity.kind !== "tool.completed") {    return false;  }   const payload =    activity.payload && typeof activity.payload === "object"      ? (activity.payload as Record<string, unknown>)      : null;  return typeof payload?.detail === "string" && payload.detail.startsWith("ExitPlanMode:");} function toDerivedWorkLogEntry(activity: OrchestrationThreadActivity): DerivedWorkLogEntry {  const payload =    activity.payload && typeof activity.payload === "object"      ? (activity.payload as Record<string, unknown>)      : null;  const commandPreview = extractToolCommand(payload);  const changedFiles = extractChangedFiles(payload);  const title = extractToolTitle(payload);  const entry: DerivedWorkLogEntry = {    id: activity.id,    createdAt: activity.createdAt,    label: activity.summary,    tone: activity.tone === "approval" ? "info" : activity.tone,

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