Problem or Use Case

When running multiple tasks in parallel (e.g. one agent doing research, another writing code), there is no way to switch between active Hermes sessions from within the TUI itself. The current workaround is to use tmux and manually navigate between panes — which works but is manual and has no session-aware context (no titles, no status, no quick preview).

Claude Code recently shipped a session switcher panel directly inside the terminal UI: you can see all currently running sessions, their titles/status, and jump between them with a keystroke. This is a significant productivity UX pattern for multi-session workflows.

Proposed Solution

Add a concurrent session switcher to the Hermes TUI — an in-terminal panel (triggered by e.g. a slash command like /sessions or a keybinding) that:

• Lists all currently active Hermes sessions (not historical/archived ones — those are covered by hermes sessions browse)
• Shows session title, model, current status (idle / working / waiting for input)
• Allows switching focus to another live session with arrow keys + Enter
• Optionally shows a brief preview of the last message

This is distinct from the existing:

• hermes sessions browse / /resume — for resuming past sessions
• /agents — shows subagents within the current session, not sibling sessions
• [Feature]: Hermes Session Selector - Professional Session Resume Interface #12406 — better historical session picker UI

Alternatives Considered

• tmux — current recommended approach, but requires the user to manage pane layout manually with no Hermes-native session awareness
• hermes dashboard (web) — browser-based, not in-terminal

Additional Context

Related: #12406 (better session resume picker — complementary but different scope)

The infrastructure for tracking active sessions already exists (active_sessions temp files, session DB). This would primarily be a TUI layer on top of that.