Feature request: Show index numbers in expanded sidebar for spaces and agents

[imroc]

Summary

When the sidebar is in expanded mode (not collapsed via prefix+b), it would be very helpful to display the index numbers (1, 2, 3...) next to each workspace/space entry and each agent entry.

Motivation

herdr already supports indexed keybindings for fast navigation:

• switch_workspace = "prefix+shift+1..9" — jump to workspace by index
• focus_agent = "prefix+alt+1..9" — jump to agent by index

However, in expanded sidebar mode, there is no visual indicator showing which index corresponds to which workspace or agent. Users have to mentally count the positions to know which number to press.

Interestingly, the collapsed sidebar already shows index numbers (line 692 in sidebar.rs: format!("{}", visible_idx + 1)), but this information is lost when the sidebar is expanded.

Proposed Solution

Show the index number before each workspace entry in render_workspace_list and before each agent entry in render_agent_detail. For example:

Current expanded sidebar:

● my-project  main
● api-server  develop
● dotfiles    master

Proposed:

1 ● my-project  main
2 ● api-server  develop
3 ● dotfiles    master

Same for the agents panel:

1 ◉ claude (running)
2 ○ copilot (idle)

Alternatives

• Make it a configuration option (e.g., sidebar_show_index = true) for users who prefer a cleaner look
• Only show indices when switch_workspace or focus_agent keybindings are configured

Additional Context

The implementation should be straightforward — the collapsed mode rendering code (render_sidebar_collapsed) already has the index logic that can be referenced. The main changes would be in render_workspace_list and render_agent_detail in src/ui/sidebar.rs.

[amberpixels]

+1

I run into this constantly. I prototyped the agents half of this on a branch, with one tweak to the placement: instead of putting the number to the left of everything (which steals width from long agent names), I render it under the status icon on the second line, so the name line keeps its full width:

 ✓ api-server
 1 idle · claude

I also capped it at 1–9, since focus_agent shortcuts stop at 9 and numbering beyond that has no matching hotkey. It's gated behind a [ui] agent_panel_numbers toggle (default off). Happy to share the implementation if it's useful, or fold it in however you'd prefer - and spaces numbering (the other half of this request) would be the natural follow-up.

#873

[faffeldt]

I would also love to see workspace numbers implemented.
But I would prefer if it would be integrated into the token based configuration approach used for the layouting of ui.sidebar.agents/spaces.rows. If it would be a simple boolean toogle it would be bolted on top of this system and lack possibly desired configurability in the layout.

An example layout config including workspace_number could look like this:

[ui.sidebar.spaces]
rows = [
  ["workspace_number", "state_icon", "workspace"],
  ["branch", "git_status"],
]

And maybe even have additional overridable configuration for the workspace_number in future as well like:

[ui.sidebar.spaces.workspace_number]
zero_based = false  # For zero based counting
color = "#aaafff" # or alternatively an e.g. `rainbow` or `gradient` mode