fix(jetbrains): keep slash completion open while typing

[kirillk]

Issue

No linked issue; reported from the JetBrains slash command fast-typing session.

Context

JetBrains slash command completion can close while typing quickly. The slash path filters commands from in-memory state and finishes immediately, while @ mentions stay in completion calculation during backend file search. When the slash lookup closes mid-token, the existing first-character trigger does not reopen it.

The prompt should also regain focus after choosing a model, agent, or reasoning option opened from a slash command, so users can keep typing without clicking back into the prompt.

Implementation

• Reopen prompt completion when a single-character keystroke lands inside a slash or mention token and no lookup is active, using the existing split-mode-safe local completion path.
• Refresh an open slash lookup when server commands finish loading, so stale No matches results can update to real server commands.
• Add a shared picker OK-close hook in PickerButton, then wire model, agent, and reasoning pickers to refocus the prompt after a selection.
• Add frontend tests for slash lookup reopen, server command refresh, and picker close selection handling.

The reopen path is limited to single-character typing so programmatic prompt text updates and paste operations do not automatically open completion.

Screenshots / Video

N/A — behavior and focus fix; no visual UI change.

How to Test

Manual/local verification

• Agent executed ./gradlew typecheck from packages/kilo-jetbrains/.
• Agent executed ./gradlew --no-configuration-cache :frontend:test from packages/kilo-jetbrains/.

Reviewer test steps

1. Open a JetBrains project with the plugin and focus the Kilo prompt.
2. Type a slash command quickly, such as /models, and confirm the completion popup stays open or reopens while filtering.
3. Type a server-backed slash command query and confirm server command matches appear once commands are loaded.
4. Choose a model via /models, an agent via /agents, and a reasoning option via /variant; after each selection, confirm focus returns to the prompt.

Blocked checks and substitute verification

• Agent attempted ./gradlew :frontend:test immediately after ./gradlew typecheck; Gradle IntelliJ instrumentation failed with classname attribute of taskdef element is undefined / No Java Compiler dependency found, consistent with a configuration-cache dependency resolution issue. Substitute verification: reran ./gradlew --no-configuration-cache :frontend:test, which passed.

Checklist

• Issue linked above, or exception explained
• Tests/verification described
• Screenshots/video included for visual changes, or marked N/A
• Changeset considered for user-facing changes
• I personally reviewed the diff and can explain the changes, including any AI-assisted work.

Get in Touch

N/A

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Files Reviewed (9 files)

• .changeset/jetbrains-slash-completion-fast-typing.md
• packages/kilo-jetbrains/frontend/src/main/kotlin/ai/kilocode/client/session/ui/ReasoningPicker.kt
• packages/kilo-jetbrains/frontend/src/main/kotlin/ai/kilocode/client/session/ui/mode/ModePicker.kt
• packages/kilo-jetbrains/frontend/src/main/kotlin/ai/kilocode/client/session/ui/model/ModelPicker.kt
• packages/kilo-jetbrains/frontend/src/main/kotlin/ai/kilocode/client/session/ui/prompt/KiloPromptCompletionProvider.kt
• packages/kilo-jetbrains/frontend/src/main/kotlin/ai/kilocode/client/session/ui/prompt/PromptPanel.kt
• packages/kilo-jetbrains/frontend/src/main/kotlin/ai/kilocode/client/ui/PickerButton.kt
• packages/kilo-jetbrains/frontend/src/test/kotlin/ai/kilocode/client/session/ui/PromptPanelTest.kt
• packages/kilo-jetbrains/frontend/src/test/kotlin/ai/kilocode/client/ui/PickerButtonTest.kt

---

_{Reviewed by grok-4.6 · Input: 535.3K · Output: 26.5K · Cached: 641.5K}

_{Review guidance: REVIEW.md from base branch main}

[WebReflection]

I couldn't find anything obviously wrong + there are tests and because Anil would've approved I'm going to give this a thumb up

[kirillk]

I couldn't find anything obviously wrong + there are tests and because Anil would've approved I'm going to give this a thumb up

Thank you!