[FEATURE] Multiple independent chat sessions / tabs in a single window

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

Use case: running parallel work streams without juggling tmux panes or separate terminal tabs
Why it's different from subagents: subagents are dispatched by Claude and report back; you want peer sessions you drive directly
UX sketch: keyboard shortcut to switch (Ctrl+Tab?), maybe a tab bar, each session has its own context and history
Alternatives considered: tmux, multiple terminal tabs, --agent flag — and why they're worse

Proposed Solution

Proposal: Browser-style tabs inside one process.

• Ctrl+T new tab, Ctrl+Tab switch, Ctrl+W close, Ctrl+1..9 jump
• Tab bar shows name + status (idle / working / notification)
• Each tab: own context, history, todos
• Shared: auth, MCP, skills, agents, settings
• Background tabs keep running; notification dot when they need attention

Why not tmux: no unified notifications, reloads MCP/state per process, not discoverable, doesn't apply to the IDE/desktop/web variants.

Open questions: per-tab vs shared working dir? Per-tab MCP connections? Persistence across restarts?

Alternative Solutions

_No response_

Priority

High - Significant impact on productivity

Feature Category

Interactive mode (TUI)

Use Case Example

_No response_

Additional Context

_No response_