[BUG] Claud Code CLI: Read tool bug. Returns "Unchanged since last read" when file modified by ANY external editor.

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?

Claud Code CLI: Read tool bug. Returns "Unchanged since last read" when file modified by external editor.

This is still happening in v2.1.185 (latest) today.

It is a GENERAL bug that needs to be fixed.

It should not have a status of NOT PLANNED as mentioned here: https://github.com/anthropics/claude-code/issues/60684

What Should Happen?

The first Read tool call should read/check the file on disk and not use a cached version or state.

Error Messages/Logs

Here is the output from Claude CLI:
I modified tasks.txt. Add another task at the end for the following: Verify that Content\Scripts\Examples\12-zoom-spiral-feedback.js is producing the output as expected. It only draws a filled circle in the middle of the screen and nothing else. Please fix.
● Read(F:\Programming\CSharp\MusicTo3D\docs\tasks.txt)
Unchanged since last read
● Read(F:\Programming\CSharp\MusicTo3D\docs\tasks.txt · lines 40-79)
Read 0 lines
● Read(F:\Programming\CSharp\MusicTo3D\docs\tasks.txt)
Read 33 lines

Steps to Reproduce

I tell the LLM that I modified the file the following happens:

1. LLM mods file
2. User mods file and deletes start lines using external editor and SAVES
3. User tells LLM that they modded the file and to read it again.
4. LLM uses read tool. Read tool says nothing was modified.
5. LLM uses read tool again but for changes at the end. Read tool says: Read 0 lines
6. LLM uses read tool again but to get the WHOLE file. Read tool says: Read 33 lines

Claude Model

Other

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.185

Platform

Other

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

I am using Ollama and the following model: kimi-k2.7-code:cloud