The Cell message

import { CellLifecycle, type Cell } from "@textql/sdk/generated/connect/public/chat_pb.js";
import { timestampDate } from "@bufbuild/protobuf/wkt";

function handle(cell: Cell) {
  cell.id;              // string — upsert key
  cell.complete;        // boolean
  cell.generated;       // boolean — true = model-authored
  cell.lifecycle;       // CellLifecycle enum
  cell.execError;       // string | undefined
  timestampDate(cell.timestamp!); // API timestamp → Date

  switch (cell.value.case) {
    case "mdCell":
      cell.value.value.content;          // streamed markdown
      break;
    case "ansCell":
      cell.value.value.content;          // final answer text
      break;
    case "sqlCell":
      cell.value.value.query;
      break;
    // ...one case per tool: pyCell, wsCell, dashboardCell, reportCell,
    // metricsCell, mcpToolCell, tableauCell, powerbiCell, and more
  }
}

const TERMINAL = new Set([CellLifecycle.EXECUTED, CellLifecycle.HALTED]);

function isFinished(cell: Cell): boolean {
  if (TERMINAL.has(cell.lifecycle)) return true;
  return cell.complete === true;
}