[Bug] Claude Code consuming excessive tokens and failing to complete basic file operations

**Bug Description**
to customers whars going on ?? why did nothing worked again ang agin ??? alle last feedbacks came from a few issues and turn into AN NEEDED BACKUP INSTALLATION Claude use actually my 80 dollar account in 3H for THE WHOLE WEEK=== AN THE TASKS ate stll NOTHING thas realy hard to dooo FOR AN AI i mean 1 SCRIPT AN 7 TIMES PROMT REPATING MY WORK TASK = CHANGE THE OUT PUT FOLDER TOOO XYZ * THAT WAS ROUND ABPUT 100.000 tokens afer he is mailing OK FISCH an i lookked down to the foulder an NOTHINH WAS REALY GOT FINISCHT I MEAM CHANGING A F**** PATH REALY ?````````````````

**Environment Info**
- Platform: win32
- Terminal: xterm-256color
- Version: 2.1.273
- Feedback ID: 48a7afdd-1e55-4894-bf36-6597bd9e7147

**Errors**
```json
[{"error":"Error: EBUSY: resource busy or locked, open 'C:\\Users\\henry\\AppData\\Local\\Temp\\claude\\C--Users-henry\\8d84b41f-3ee8-4d55-b878-6c92e30758c5\\tasks\\bekeuptue.output'\n at async (node:fs/promises:179:56)\n at async #d (B:/~BUN/root/chunk-arw6zffr.js:15:341)\n at async #g (B:/~BUN/root/chunk-arw6zffr.js:15:1010)","timestamp":"2026-09-16T16:51:04.385Z"},{"error":"TelemetrySafeError: VirtualMessageList: itemKeys/messages length desync (keys=439 messages=438 range=[411,439))\n at m7t (B:/~BUN/root/chunk-c5xn880r.js:37:30931)\n at awe (B:/~BUN/root/chunk-c5xn880r.js:37:21813)\n at iu (B:/~BUN/root/chunk-x70mgmyw.js:18:20017)\n at vu (B:/~BUN/root/chunk-x70mgmyw.js:18:38159)\n at vm (B:/~BUN/root/chunk-x70mgmyw.js:18:84185)\n at wb (B:/~BUN/root/chunk-x70mgmyw.js:18:83187)\n at ku (B:/~BUN/root/chunk-x70mgmyw.js:18:83016)\n at dm (B:/~BUN/root/chunk-x70mgmyw.js:18:79549)\n at Fn (B:/~BUN/root/chunk-x70mgmyw.js:18:6254)\n at ti (B:/~BUN/root/chunk-x70mgmyw.js:18:4788)","timestamp":"2026-09-16T19:31:55.404Z"}]
```

No source files or tests are named. Start by reproducing the reported Windows file-operation failure in Claude Code 2.1.273, focusing on the EBUSY error for the temporary .output file and the VirtualMessageList desync, then compare the observed token usage and file-operation result with the report.

Written by the indexing model from the issue text.