Method appendOutput

src/node/services/initStateManager.ts:247–275

* Append output line from init hook. * Accumulates in state (with truncation for long output) and emits init-output event. * * Truncation strategy: Keep only the most recent INIT_HOOK_MAX_LINES lines (tail). * Older lines are dropped to prevent OOM with large rsync/build output.

(workspaceId: string, line: string, isError: boolean)

   * Older lines are dropped to prevent OOM with large rsync/build output.
   */
  appendOutput(workspaceId: string, line: string, isError: boolean): void {
    const state = this.store.getState(workspaceId);

    if (!state) {
      log.error(`appendOutput called for workspace ${workspaceId} with no active init state`);
      return;
    }

    const timestamp = Date.now();
    const lineNumber = (state.truncatedLines ?? 0) + state.lines.length;
    const timedLine: TimedLine = { line, isError, timestamp };

    // Truncation: keep only the most recent MAX_LINES
    if (state.lines.length >= INIT_HOOK_MAX_LINES) {
      state.lines.shift(); // Drop oldest line
      state.truncatedLines = (state.truncatedLines ?? 0) + 1;
    }
    state.lines.push(timedLine);

    // Emit init-output event (always emit for live streaming, even if truncated from storage)
    this.emit("init-output", {
      type: "init-output",
      workspaceId,
      line,
      isError,
      timestamp,
      lineNumber,
    } satisfies WorkspaceInitEvent & { workspaceId: string });
  }

  /**
   * Finalize init hook execution.