[BUG] CLI outputs `mailto:` in front of all strings with "email-like" format, even when not applicable

Environment

• Platform (select one):
• [x] Anthropic API
• [ ] AWS Bedrock
• [ ] Google Vertex AI
• [ ] Other: <!-- specify -->
• Claude CLI version: 0.2.125
• Operating System: 15.4.1 (24E263)
• Terminal: Warp, oh-my-zsh

Bug Description

The CLI adds the mailto: label to emails (which I do think is generally useful!) However, it even does so in cases where it does not apply (such as when generating/parsing DB connection strings). I think the model should be given discretion on whether to prefix a string with mailto: or not, rather than the naive logic I think the CLI is currently doing.

Steps to Reproduce

1. Ask the model to generate you a dummy postgressql connection string with a dummy domain name.

Expected Behavior

To receive something like: postgres://username:password@example.com:5432/database

Actual Behavior

Received: postgres://username:mailto:password@example.com:5432/database

Additional Context

<img width="598" alt="Image" src="https://github.com/user-attachments/assets/cf92d06d-1d46-482b-9fa6-2ba7f8f00aab" />