Signalbox.Nvim — Development skill for Claude Code

signalbox.nvim

`signalbox.nvim` is an attention-first Neovim control surface for persistent coding agents managed by [Herdr](https://herdr.dev/).

It is named after a railway signal box: it does not drive the trains or replace their engines. It gives one operator a compact view of traffic, highlights the routes that need intervention, and provides safe controls at the junctions.

[!NOTE] This is an unofficial community integration. It is not maintained or endorsed by the Herdr project.

The job

When I delegate work to several coding agents while editing, help me notice only the work that needs human attention, inspect it without touring terminal panes, intervene, and return after Neovim restarts.

That job shapes the product:

• Herdr owns PTYs, processes, semantic state, and persistence.
• Signalbox owns the Neovim view, transient cache, and editor actions.
• blocked and done come before terminal topology.
• Recent terminal output is previewed but never persisted by this plugin.
• Attach, prompt, start, and repository actions remain explicit user actions.

Features

• 90% floating attention board, sized like a full-screen Lazygit workflow
• Current project agents plus blocked/done agents elsewhere by default
• A compact count of agents still working elsewhere, without crowding the attention queue
• Ephemeral recent-output preview for the selected agent
• In-product INPUT → RESULT guide for every board key
• One-key Herdr state explanation with matched detection rule and evidence
• Stable role names for agents discovered outside Signalbox
• Notifications when an agent becomes blocked or completes work
• Herdr 0.9.0-verified workspace/tab creation and per