feat: add kotlin commands and skill pack

commands/kotlin-build.md

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+---
+description: Fix Kotlin/Gradle build errors, compiler warnings, and dependency issues incrementally. Invokes the kotlin-build-resolver agent for minimal, surgical fixes.
+---
+
+# Kotlin Build and Fix
+
+This command invokes the **kotlin-build-resolver** agent to incrementally fix Kotlin build errors with minimal changes.
+
+## What This Command Does
+
+1. **Run Diagnostics**: Execute `./gradlew build`, `detekt`, `ktlintCheck`
+2. **Parse Errors**: Group by file and sort by severity
+3. **Fix Incrementally**: One error at a time
+4. **Verify Each Fix**: Re-run build after each change
+5. **Report Summary**: Show what was fixed and what remains
+
+## When to Use
+
+Use `/kotlin-build` when:
+- `./gradlew build` fails with errors
+- Kotlin compiler reports errors
+- `./gradlew detekt` reports violations
+- Gradle dependency resolution fails
+- After pulling changes that break the build
+
+## Diagnostic Commands Run
+
+```bash
+# Primary build check
+./gradlew build
+
+# Static analysis
+./gradlew detekt
+./gradlew ktlintCheck
+
+# Dependency issues
+./gradlew dependencies --configuration runtimeClasspath
+./gradlew build --refresh-dependencies
+```
+
+## Example Session
+
+````text
+User: /kotlin-build
+
+Agent:
+# Kotlin Build Resolution
+
+## Initial Diagnostics
+
+```bash
+$ ./gradlew build
+e: src/main/kotlin/com/example/service/UserService.kt:25:15 Unresolved reference: UserRepository
+e: src/main/kotlin/com/example/routes/UserRoutes.kt:42:9 Type mismatch: inferred type is String but Int was expected
+e: src/main/kotlin/com/example/routes/UserRoutes.kt:58:5 'when' expression must be exhaustive
+```
+
+Errors found: 3
+
+## Fix 1: Unresolved Reference
+
+File: src/main/kotlin/com/example/service/UserService.kt:25
+Error: Unresolved reference: UserRepository
+Cause: Missing import
+
+```kotlin
+// Added import
+import com.example.repository.UserRepository
+```
+
+```bash
+$ ./gradlew build
+# 2 errors remaining
+```
+
+## Fix 2: Type Mismatch
+
+File: src/main/kotlin/com/example/routes/UserRoutes.kt:42
+Error: Type mismatch: inferred type is String but Int was expected
+
+```kotlin
+// Changed
+val count = call.parameters["count"]
+// To
+val count = call.parameters["count"]?.toIntOrNull()
+    ?: return@get call.respond(HttpStatusCode.BadRequest, "Invalid count")
+```
+
+```bash
+$ ./gradlew build
+# 1 error remaining
+```
+
+## Fix 3: Non-Exhaustive When
+
+File: src/main/kotlin/com/example/routes/UserRoutes.kt:58
+Error: 'when' expression must be exhaustive
+
+```kotlin
+// Added missing branch
+when (user.role) {
+    Role.ADMIN -> handleAdmin(user)
+    Role.USER -> handleUser(user)
+    Role.MODERATOR -> handleModerator(user) // Added
+}
+```
+
+```bash
+$ ./gradlew build
+# Build successful!
+```
+
+## Final Verification
+
+```bash
+$ ./gradlew detekt
+# No issues
+
+$ ./gradlew test
+# All tests passed
+```
+
+## Summary
+
+| Metric | Count |
+|--------|-------|
+| Build errors fixed | 3 |
+| Detekt issues fixed | 0 |
+| Files modified | 2 |
+| Remaining issues | 0 |
+
+Build Status: ✅ SUCCESS
+````
+
+## Common Errors Fixed
+
+| Error | Typical Fix |
+|-------|-------------|
+| `Unresolved reference: X` | Add import or dependency |
+| `Type mismatch` | Fix type conversion or assignment |
+| `'when' must be exhaustive` | Add missing sealed class branches |
+| `Suspend function can only be called from coroutine` | Add `suspend` modifier |
+| `Smart cast impossible` | Use local `val` or `let` |
+| `None of the following candidates is applicable` | Fix argument types |
+| `Could not resolve dependency` | Fix version or add repository |
+
+## Fix Strategy
+
+1. **Build errors first** - Code must compile
+2. **Detekt violations second** - Fix code quality issues
+3. **ktlint warnings third** - Fix formatting
+4. **One fix at a time** - Verify each change
+5. **Minimal changes** - Don't refactor, just fix
+
+## Stop Conditions
+
+The agent will stop and report if:
+- Same error persists after 3 attempts
+- Fix introduces more errors
+- Requires architectural changes
+- Missing external dependencies
+
+## Related Commands
+
+- `/kotlin-test` - Run tests after build succeeds
+- `/kotlin-review` - Review code quality
+- `/verify` - Full verification loop
+
+## Related
+
+- Agent: `agents/kotlin-build-resolver.md`
+- Skill: `skills/kotlin-patterns/`