Function handleSpawnSeparateWindow

src/tools/shared/spawnMultiAgent.ts:545–753

* Handle spawn operation using separate windows (legacy behavior). * Creates each teammate in its own tmux window.

(
  input: SpawnInput,
  context: ToolUseContext,
)

 * Creates each teammate in its own tmux window.
 */
async function handleSpawnSeparateWindow(
  input: SpawnInput,
  context: ToolUseContext,
): Promise<{ data: SpawnOutput }> {
  const { setAppState, getAppState } = context
  const { name, prompt, agent_type, cwd, plan_mode_required } = input

  // Resolve model: 'inherit' → leader's model; undefined → default Opus
  const model = resolveTeammateModel(input.model, getAppState().mainLoopModel)

  if (!name || !prompt) {
    throw new Error('name and prompt are required for spawn operation')
  }

  // Get team name from input or inherit from leader's team context
  const appState = getAppState()
  const teamName = input.team_name || appState.teamContext?.teamName

  if (!teamName) {
    throw new Error(
      'team_name is required for spawn operation. Either provide team_name in input or call spawnTeam first to establish team context.',
    )
  }

  // Generate unique name if duplicate exists in team
  const uniqueName = await generateUniqueTeammateName(name, teamName)

  // Sanitize the name to prevent @ in agent IDs (would break agentName@teamName format)
  const sanitizedName = sanitizeAgentName(uniqueName)

  // Generate deterministic agent ID from name and team
  const teammateId = formatAgentId(sanitizedName, teamName)
  const windowName = `teammate-${sanitizeName(sanitizedName)}`
  const workingDir = cwd || getCwd()

  // Ensure the swarm session exists
  await ensureSession(SWARM_SESSION_NAME)

  // Assign a unique color to this teammate
  const teammateColor = assignTeammateColor(teammateId)

  // Create a new window for this teammate
  const createWindowResult = await execFileNoThrow(TMUX_COMMAND, [
    'new-window',
    '-t',
    SWARM_SESSION_NAME,
    '-n',
    windowName,
    '-P',
    '-F',
    '#{pane_id}',
  ])

  if (createWindowResult.code !== 0) {
    throw new Error(
      `Failed to create tmux window: ${createWindowResult.stderr}`,
    )
  }