[FEATURE] Add option to disable auto-attach currently open file in VSCode extension

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

When using the Claude Code VSCode extension, the currently opened file is automatically attached as context in every chat message.

For large files (e.g., 2000+ line C files in embedded firmware projects), this wastes a significant amount of tokens on every message, even when the question has nothing to do with the current file.

The current workflow requires me to manually click the X on the file chip every time before sending a message. This is repetitive and easy to forget.

Proposed Solution

Add a setting in the VSCode extension (e.g., claude-code.autoAttachOpenFile) that allows users to disable the automatic attachment of the currently opened file.

Options could be:

• always (current behavior, default)
• never (never auto-attach)
• ask (show the chip but default to hidden/disabled)

This way users who work with large files can opt out of the automatic context inclusion and only use @-mentions or Alt+K when they explicitly want to reference a file.

Alternative Solutions

_No response_

Priority

Critical - Blocking my work

Feature Category

CLI commands and flags

Use Case Example

_No response_

Additional Context

_No response_