The whole hunk
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149149When you select text in the editor, Claude can see your highlighted code automatically. The prompt box footer shows how many lines are selected. Press `Option+K` (Mac) / `Alt+K` (Windows/Linux) to insert an @-mention with the file path and line numbers (e.g., `@app.ts#5-10`). Click the **X** on the selection indicator to remove it so Claude doesn't receive the selection. The indicator comes back when you select other text.
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151The extension withholds selected text from some files. When the file is inside your workspace and matches your `files.exclude` or `search.exclude` settings, Claude receives at most the file's path and not the text you selected. The same applies to a file git ignores, as long as VS Code's `search.useIgnoreFiles` setting and the extension's [`respectGitIgnore` setting](#extension-settings) are both on, which is the default. This filter covers the chat panel only: when Claude Code runs in the integrated terminal, the CLI sends your selected text whatever the file, so add a [`Read` deny rule](#the-built-in-ide-mcp-server) to keep a file's contents from Claude there.
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151153Claude also sees which file you have open in the editor, even when nothing is selected, and the prompt box shows its name. To add only your selected text, turn off the [Attach Open File setting](vscode://settings/claudeCode.attachOpenFile). The setting requires Claude Code v2.1.271 or later.
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153155To attach an image, paste it from your clipboard into the prompt box. You can also hold `Shift` while dragging files into the prompt box to add them as attachments. Click the X on any attachment to remove it from context.
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431433| `archiveInactiveSessions` | `14` | [Archive a session automatically](#resume-past-conversations) after this many days without activity: `1`, `2`, `7`, or `14`. Set `0` to turn it off. Requires Claude Code v2.1.265 or later |
432434| `hideOnboarding` | `false` | Hide the onboarding checklist (graduation cap icon) |
433435| `focusView` | `false` | Hide tool calls, tool results, and thinking behind expandable rows, leaving your prompts and Claude's responses. Claude's latest to-do list stays visible; this requires Claude Code v2.1.225 or later. You can also toggle Focus view from the command menu. Requires Claude Code v2.1.221 or later |
434| `respectGitIgnore` | `true` | Exclude .gitignore patterns from file searches |
436| `respectGitIgnore` | `true` | Exclude .gitignore patterns from file searches and from [selection context](#reference-files-and-folders) |
435437| `usePythonEnvironment` | `true` | Activate the workspace's Python environment when running Claude. Requires the Python extension. |
436438| `environmentVariables` | `[]` | Set environment variables for the Claude process. Use Claude Code settings instead for shared config. |
437439| `disableLoginPrompt` | `false` | Skip authentication prompts (for third-party provider setups) |