VS Code extension: strip trailing newline when copying fenced code blocks (or make it configurable)

Problem Statement

In the Claude Code VS Code native extension, fenced code blocks in Claude's responses render with a copy affordance. When I click it, the clipboard ends up with a trailing \n after the final line of content.

That's fine for multi-line scripts, but it's frequently annoying when the copied artifact is destined for a single-line input — a CLI prompt, a branch-name field, a commit-message subject, an issue title, etc. — where the trailing newline either submits the form prematurely or has to be manually deleted.

Proposed Solution

Two options, in order of preference:

1. Strip the trailing newline by default. Users who want one back can add it themselves; users who don't want it (the more common case for me) get the right behavior for free.
2. Make it configurable via a setting (e.g., claudeCode.copy.trimTrailingNewline) so each user can pick their default.

Either would be a small UX win and shouldn't affect anything else.

Related

• #48641 — request for the copy affordance itself in the VS Code extension. This issue is a follow-up on the behavior of that affordance.

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_Drafted by Claude (Anthropic AI assistant)._