[FEATURE] /restart command for in-session environment refresh

Feature Request: /restart command for in-session environment refresh

Problem

As Claude Code ecosystem grows with plugins, skills, hooks, and marketplaces, updates frequently require restart to apply. The current workflow is cumbersome:

1. /exit to leave session
2. Run claude --resume or claude --continue externally
3. With multiple concurrent sessions, must identify correct session ID
4. Manual juggling of commands and context

Additionally, /clear command is reported as broken and doesn't actually clear context (see #10035, #17054, #17039).

Proposed Solution

Add /restart command with flags:

• /restart or /restart --clean (default): Fresh start, clear context
• /restart --resume: Refresh environment (reload plugins, apply updates) while preserving current session context

Use Case

• Apply plugin updates without losing work context
• Refresh environment after marketplace updates
• Simplify session management without external command juggling
• Particularly valuable with multiple concurrent Claude Code sessions

References

• Related (different scope): #425 (Docker-specific, closed)
• Broken /clear reports: #10035, #17054, #17039

Submitted feedback ID: 61e13ca7-3311-4381-8647-8a4c2e6a3851