Agent state detection for MiniMax Code (mcode)

[kele98]

idea / problem

MiniMax Code — MiniMax's new terminal coding agent (mcode, npm @minimax-ai/code) — was just released. I've been running it inside Herdr as my main agent since it shipped, and those panes go completely undetected: the Agents panel, sounds, and herdr wait are all blind to mcode sessions.

requested change

Ship agent state detection for MiniMax Code. The v0.1.2 screen looks quite regular, for what it's worth:

• idle: › prompt box between two horizontal rules
• working: footer like ⠸ Loading 1s · Enter queue · Ctrl+X steer · Ctrl+O details · Esc stop
• blocked: ◆ Approval needed permission dialog, and Plan-mode dialogs (Use Plan mode?, Ask ─ …, Plan Review … Frozen Runtime snapshot)

I have real screen captures for each state and am happy to share them. While exploring the detection code I also put together a reference branch on my fork (feature/MiniMax-detection) — feel free to use it, ignore it, or land this however you prefer.

why you want this

I keep several mcode panes in background workspaces and rely on Herdr's state reporting to see which agent is idle, working, or blocked on a permission dialog; with mcode I have to switch to each pane manually. I've also been participating in the mcode beta, so I usually see UI changes before they hit a public release — the chrome has already shifted once between builds. If Herdr adds mcode detection, I'd be glad to maintain it long-term, whether that's posting updated captures and manifest tweaks here for maintainers to land, or anything else that fits your process.