[Claude Desktop] Background token consumption without user interaction — 5% weekly usage lost overnight

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Weekly usage increased ~5% overnight (16:30 May 11 to 10:15 May 12) with
zero user interaction. Claude Desktop was left open with 14 background
processes running. No Claude Code CLI sessions exist in local JSONL logs
during that period, confirmed via claude-usage tool.

What Should Happen?

Weekly usage should only increase when the user explicitly sends a message.
Background processes from Claude Desktop should not consume tokens silently.

Error Messages/Logs

claude-usage weekly report (2026-05-06 to 2026-05-12):
    2026-05-09  turns=0    cost=$0.00
    2026-05-10  turns=0    cost=$0.00
    2026-05-11  turns=312  cost=$12.67  (last session ended 16:19)
    2026-05-12  turns=18   cost=$0.55   (first session started 10:15)

  14 claude.exe (Electron) processes running since 11/05 12:23
  No JSONL files modified between 16:19 May 11 and 10:15 May 12

Steps to Reproduce

Steps to Reproduce

1. Open Claude Desktop and have active conversations during the day
2. Leave Claude Desktop open overnight (do not close the app)
3. Do not send any messages — zero interaction
4. Check weekly usage % in Settings > Usage the next morning
5. Compare with local JSONL logs via claude-usage tool
6. Usage % will be higher than what local logs account for

Claude Code Version → rode ! claude --version aqui no prompt para pegar o número

Operating System → Windows 11 Home

Terminal/Shell → PowerShell

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

2.1.139 (Claude Code)

Claude Code Version

2.1.139 (Claude Code)

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

• Anthropic support bot confirmed: "documentation does not address whether

Claude Desktop performs background operations"

• Tool used for log verification: https://github.com/phuryn/claude-usage
• Related issue: #51222 (rolling window reset anomaly)
• Cache read this week: 101.19M tokens (heavy context reloading)