system-reminder tags visible in terminal output (v2.1.71)

Bug Description

<system-reminder> blocks injected by Claude Code are visible to the user in the terminal instead of being hidden. Additionally, tool result tails (⎿ characters) appear to bleed into the visible output.

Steps to Reproduce

1. Start a Claude Code session
2. Have an active conversation
3. Observe that <system-reminder>...</system-reminder> blocks appear at the beginning of responses in the terminal

Expected Behavior

System reminders should be invisible to the user — they are internal context injections for the model only.

Actual Behavior

Raw <system-reminder> XML tags and their content are rendered in the terminal output, visible to the user. Tool result continuation characters (⎿) also appear in the visible text.

Environment

• Claude Code version: 2.1.71
• OS: Windows 10 Pro 10.0.19045
• Shell: bash (Git Bash)
• Node: via npm global install

Additional Context

The issue appears consistently across multiple responses in a session, not just occasionally.