hermes - 💡(How to fix) Fix /sessions command on gateway platforms is recognized but has no handler — returns unknown command or falls through as plain text [2 pull requests]

Bug

The /sessions slash command doesn't work on gateway messaging platforms (Telegram etc.). It shows Unknown command: /sessions instead of returning the session list.

Analysis

/sessions IS registered in COMMAND_REGISTRY at hermes_cli/commands.py:113 with category Session and no cli_only flag, so it's included in GATEWAY_KNOWN_COMMANDS. However, gateway/run.py's _handle_message method has no if canonical == "sessions": handler — there are handlers for new, topic, help, status, agents, etc., but nothing for sessions.

The command flows through the hook system (fires command:sessions) but then falls all the way through without matching any handler block. It reaches the quick-commands, plugin, and skill checks, fails all of them, and depending on exact code path either returns Unknown command or passes /sessions to the LLM as a plain text user message — neither of which is the intended behavior.

Expected

/sessions should list the user's active/recent sessions (similar to how /sessions works in the Hermes Agent TUI).

Steps to reproduce

1. Set up Hermes Agent with a messaging platform (e.g. Telegram)
2. Send /sessions in any chat
3. Observe the error ("Unknown command") or silent passthrough as plain text

Environment

• hermes-agent main branch
• Gateway platform (Telegram etc.)

Links

• CommandDef registration: hermes_cli/commands.py:113
• Gateway _handle_message (missing handler): gateway/run.py
• TUI /sessions (works): documented at website/docs/user-guide/tui.md