Claude Session URL appended to commit messages and PR descriptions by default

默认在提交信息和 PR 描述中附加 Claude 会话链接

Problem Statement Every commit message and PR description created by Claude Code automatically includes a session URL at the bottom (e.g. https://claude.ai/code/session_…). There is no opt-in prompt, no warning, and no mention of it during onboarding. Users only discover it after it’s already polluting their git history.

问题陈述 由 Claude Code 创建的每一条提交信息（commit message）和 PR 描述都会在底部自动包含一个会话 URL（例如 https://claude.ai/code/session_…）。系统既没有提供加入选项（opt-in），也没有任何警告，更未在引导过程中提及。用户往往是在该链接已经“污染”了 Git 历史记录后才发现这一行为。

Proposed Solution Make the session URL attribution opt-in — don’t include it unless the user explicitly enables it. A one-time prompt during onboarding (“Would you like to include a link back to this Claude session in commit messages?”) would be the ideal UX.

建议解决方案 将会话 URL 的归属信息改为“加入式”（opt-in）——除非用户明确启用，否则不应包含该链接。在引导过程中设置一次性提示（例如：“您是否希望在提交信息中包含指向此 Claude 会话的链接？”）将是理想的用户体验。

Alternative Solutions Keep it opt-out but make the setting discoverable — show it during first commit with a “Don’t add this again” option. Remove it entirely and rely only on the existing Co-Authored-By: Claude trailer for attribution.

替代方案 保持“退出式”（opt-out）但提高设置的可见性——在首次提交时显示该选项，并提供“不再添加”的选项。或者完全移除该功能，仅依赖现有的 Co-Authored-By: Claude 尾注来进行归属说明。

Use Case Example A developer uses Claude Code to build a feature, commits the work, and opens a PR. Their teammates and open source contributors see https://claude.ai/code/session_… at the bottom of every commit and PR description. It looks unprofessional, clutters history, and the developer had no idea it was being added.

用例示例 一名开发者使用 Claude Code 构建功能、提交代码并开启了一个 PR。他们的团队成员和开源贡献者会在每一条提交和 PR 描述的底部看到 https://claude.ai/code/session_…。这看起来很不专业，且干扰了历史记录，而开发者本人此前完全不知道这些内容被自动添加了。

Additional Context The attribution.commit: "" setting in .claude/settings.json can suppress it, but it’s completely undiscovered. A commit-msg git hook can also strip it, but it doesn’t always fire reliably in remote/cloud environments.

补充背景 虽然可以通过 .claude/settings.json 中的 attribution.commit: "" 设置来禁用该功能，但该设置极其隐蔽，用户很难发现。此外，虽然可以使用 commit-msg 的 Git Hook 来剔除这些链接，但在远程或云端环境中，该 Hook 并不总是能可靠地触发。