fix(jetbrains): improve slash command matching

[kirillk]

Issue

No linked issue; user-requested JetBrains slash completion fix.

Context

JetBrains slash command completion only used case-insensitive prefix matching, so command and skill names were hard to discover when users typed separator-aware prefixes, camel-case abbreviations, or substrings.

Implementation

This updates prompt completion matching to use IntelliJ's NameUtil/MinusculeMatcher scoring while keeping the existing custom completion provider flow. Prefix and camel/separator matches are scored above middle matches, so direct command-name matches appear before contained matches. The same matcher is reused for special mention names, while backend file-search results remain unchanged because they are already filtered by the backend.

Screenshots / Video

How to Test

Manual/local verification

• Agent ran ./gradlew :frontend:test --tests ai.kilocode.client.session.ui.prompt.KiloPromptCompletionProviderTest from packages/kilo-jetbrains/ and it passed.
• Pre-push hook ran bun turbo typecheck --filter=!@kilocode/kilo-jetbrains and bun turbo typecheck --filter=@kilocode/kilo-jetbrains; both passed.

Reviewer test steps

1. Open the JetBrains plugin prompt.
2. Type /jet with commands or skills such as jetbrains-one, jetbrains-two, and three-jetbrains; confirm the jetbrains-* prefix matches appear above three-jetbrains.
3. Type /j-; confirm hyphenated names such as jetbrains-one and jetbrains-two are suggested.
4. Type an all-caps camel-hump abbreviation such as /JBS; confirm camelCase names such as jetBrainsSkill are suggested.

Blocked checks and substitute verification

• None.

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

lgtm — the matcher swap is well-scoped: prefix matches are scored strictly above contained matches, separator-containing prefixes correctly restrict to start matching, and the client-name dedup plus mention reuse of the same ranker behave as described. Tests exercise the real implementation with no mocks. No resource or memory-leak concerns introduced (the Ranker is transient per completion invocation).

Files Reviewed (3 files)

• .changeset/jetbrains-slash-completion.md
• packages/kilo-jetbrains/frontend/src/main/kotlin/ai/kilocode/client/session/ui/prompt/KiloPromptCompletionProvider.kt
• packages/kilo-jetbrains/frontend/src/test/kotlin/ai/kilocode/client/session/ui/prompt/KiloPromptCompletionProviderTest.kt

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_{Reviewed by kimi-k3 · Input: 76.6K · Output: 12.3K · Cached: 329.7K}

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