[BUG] subagents too slow and cost more tokens

Environment

• Platform (select one):
• [x] Anthropic API
• [ ] AWS Bedrock
• [ ] Google Vertex AI
• [ ] Other: <!-- specify -->
• Claude CLI version: 1.0.64
• Operating System: macos
• Terminal: iTerm2

Bug Description

I am unable to investigate the cause, as the agents provide no debug information to let me know. However, from the statistics, the sub-agents consume an excessive number of tokens.
For the same task, in the main task with clear clearing, it is only 2-3k tokens, at most no more than 10k. But for the sub-agents, it is 160K, 3m.

that task only writes one file, reads some files and context. The context is large, but I believe the way context is passed with the main control window must be different.

  Done (12 tool uses · 153.8k tokens · 3m 32.2s)