Agentic mode fails to reference mentioned files in prompts

[dnachavez]

Before submitting your bug report

• I'm not able to find an open issue that reports the same bug

Environment

- OS: macOS Sequoia
- Sidecar commit: {"version_hash":"366b6a8aeb6d8b3110f0a689c5e5b082635e59bbfc8875608e8fe025e6c1826d","package_version":"0.1.8"}
- IDE commit: 3647b7f08aebc65e6d886e2b435aae69feb44763

Description

When using the agentic mode, the agent fails to use the files explicitly mentioned in the chat using @. Instead of directly referencing the mentioned files, the agent tries to locate the files in the codebase by searching, sometimes using its own regex logic. This behavior leads to inconsistent results and often fails to find the correct file, especially when the mentioned files are not currently opened in the IDE.

Reproduction

1. Switch to agentic mode.
2. Provide a specific prompt that includes references to files using @, ensuring the mentioned files are not currently open.
3. Observe the agent's behavior when attempting to use the mentioned files.
4. Note that the agent tries to locate files in the codebase via search or regex rather than referencing the mentioned files.

Log output

No response