For certain existing files, Q chat erases most of the file unintentionally (uses 'create' instead of 'str_replace')

Checks

• I have searched github.com/aws/amazon-q-developer-cli/issues and there are no duplicates of my issue
• I have run q doctor in the affected terminal session
• I have run q restart and replicated the issue again

Operating system

macOS 15.3.2 (24D81)

Expected behaviour

While making targeted code changes, Q should only edit required lines.

Actual behaviour

While making targeted code changes, Q currently unintentionally removes lines that are required. For example, in a 300 line file, it wanted to added 2 lines near line 30. However, the diff removed all lines after that line.

On prompting, Q corrected itself.

> no this is a bad change, you are removing lines that are need

I apologize for the error. You're right - using the create command would replace the entire file, which is not what we want. Let's make
a more targeted change using str_replace instead.

Steps to reproduce

No response

Environment

Das Issue nennt keine Quelldatei, keinen Test und keine reproduzierbaren Schritte. Beginne damit, den Pfad von Q chat für Dateibearbeitung und Toolauswahl bei bestehenden Dateien nachzuverfolgen und die create- und str_replace-Operationen zu vergleichen; abgeschlossen ist die Aufgabe, wenn eine gezielte Bearbeitung nicht betroffene Zeilen unverändert lässt und ein Regressionstest diesen Fall abdeckt.