Bug: write_to_file with empty content appears to succeed but no file is created

[KJ7LNW]

Description

When using the write_to_file tool with empty content, Roo appears to proceed as if the operation completed successfully, but no file is actually created. This happens even when auto-approve is disabled, and there's no feedback to the model about the failure.

Reproduction Steps

1. Start a new conversation with Roo
2. Ask Roo to create an empty file using write_to_file with empty content
3. Observe that Roo proceeds as if the file was created successfully
4. Check that no file was actually created on disk

Example code:

<write_to_file>
<path>test_insert.txt</path>
<content></content>
<line_count>0</line_count>
</write_to_file>

Expected Behavior

• It should create an empty file as requested

Actual Behavior

The tool appears to succeed (no error is returned to the model), but no file is actually created. The model continues with its task as if the file was created successfully.

Environment

• Roo Version: 3.17.1
• API Provider: Anthropic
• Model: sonnet-3.5

Additional Context

This issue could lead to confusion in workflows where empty files are needed or where the model assumes a file exists when it doesn't.

[dosubot]

The issue you're experiencing with the write_to_file tool not creating a file when provided with empty content might be related to the requirement for the line_count parameter. According to the Roo Code documentation, the write_to_file tool requires a line_count parameter, which includes empty lines. This means that even if the content is empty, the line_count must accurately reflect the number of lines, including any empty lines, to prevent potential content truncation ^[1].

Additionally, the release notes for version 3.14.0 mention that the tool will correctly revert changes and suggest alternative tools when write_to_file fails due to a missing line count, highlighting the importance of providing this parameter even for empty content ^[2].

It seems that the tool might not be handling the creation of empty files as expected, and this could be a limitation or bug in the current implementation. You might want to check if there are any open issues or discussions related to this behavior in the repository.

To continue talking to Dosu, mention @dosu.

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