[Bug] Arrow keys switch plugin config tabs instead of cycling option values

Bug Description

What's wrong?

In the /plugin "Configure <plugin>" screen, pressing ←/→ on an option that has an options list switches the dialog's top tab bar (Plugins · Discover · Installed · Marketplaces · Errors · Stats) instead of only cycling the option's value. The footer hint says ←/→ to change, so the arrows are expected to change the value, not the tab.

This screen opens automatically right after /plugin install when the plugin's manifest declares userConfig, so every user installing such a plugin runs into it.

What should happen?

While the focus is on a userConfig field with options, ←/→ should cycle that field's value and leave the tab bar alone, as the footer hint promises. Tab switching could stay on Tab/Shift+Tab, or on ←/→ only when the tab row has focus (as 2.1.281 did for /permissions and /usage).

Steps to reproduce

1. Use a plugin whose plugin.json declares a string userConfig field with options, for example:

``json
"userConfig": {
"mode": {
"type": "string",
"title": "Rail mode",
"description": "off | vertical | horizontal",
"default": "horizontal",
"options": ["off", "vertical", "horizontal"]
}
}
``

A public example is prompt-rail in the oikon48/prompt-rail marketplace.

1. /plugin marketplace add oikon48/prompt-rail
2. /plugin install prompt-rail@oikon48
3. The "Configure prompt-rail" screen opens with "Rail mode ◀ horizontal ▶" focused.
4. Press ← or →.

Result: the highlighted tab in the top bar moves (e.g. away from Discover). <Say here whether the Rail mode value also changes.>

Is this a regression?

I don't know. 2.1.0 added "left/right arrow key navigation for cycling through tabs in dialogs", and 2.1.281 reworked focus handling in tabbed dialogs. The userConfig option picker in /plugin may not have been excluded from the tab handling.

Claude Code version

2.1.282

Platform / OS / Terminal

Anthropic API / macOS (Darwin 25.5.0) / <terminal name>

Related

• #74289 (config panel rendering; mentions the old lack of an enum picker)
• #94679 (userConfig with options fails to install on Windows desktop)

Environment Info

• Platform: darwin
• Terminal: ghostty
• Version: 2.1.282
• Feedback ID: 6b254263-bc44-4e2c-8380-12f004a1059d

Errors

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