---
description: Fix Gradle build errors for Android and KMP projects
---

# Gradle Build Fix

Incrementally fix Gradle build and compilation errors for Android and Kotlin Multiplatform projects.

## Step 1: Detect Build Configuration

Identify the project type and run the appropriate build:

| Indicator | Build Command |
|-----------|---------------|
| `build.gradle.kts` + `composeApp/` (KMP) | `./gradlew composeApp:compileKotlinMetadata 2>&1` |
| `build.gradle.kts` + `app/` (Android) | `./gradlew app:compileDebugKotlin 2>&1` |
| `settings.gradle.kts` with modules | `./gradlew assemble 2>&1` |
| Detekt configured | `./gradlew detekt 2>&1` |

Also check `gradle.properties` and `local.properties` for configuration.

## Step 2: Parse and Group Errors

1. Run the build command and capture output
2. Separate Kotlin compilation errors from Gradle configuration errors
3. Group by module and file path
4. Sort: configuration errors first, then compilation errors by dependency order

## Step 3: Fix Loop

For each error:

1. **Read the file** — Full context around the error line
2. **Diagnose** — Common categories:
   - Missing import or unresolved reference
   - Type mismatch or incompatible types
   - Missing dependency in `build.gradle.kts`
   - Expect/actual mismatch (KMP)
   - Compose compiler error
3. **Fix minimally** — Smallest change that resolves the error
4. **Re-run build** — Verify fix and check for new errors
5. **Continue** — Move to next error

## Step 4: Guardrails

Stop and ask the user if:
- Fix introduces more errors than it resolves
- Same error persists after 3 attempts
- Error requires adding new dependencies or changing module structure
- Gradle sync itself fails (configuration-phase error)
- Error is in generated code (Room, SQLDelight, KSP)

## Step 5: Summary

Report:
- Errors fixed (module, file, description)
- Errors remaining
- New errors introduced (should be zero)
- Suggested next steps

## Common Gradle/KMP Fixes

| Error | Fix |
|-------|-----|
| Unresolved reference in `commonMain` | Check if the dependency is in `commonMain.dependencies {}` |
| Expect declaration without actual | Add `actual` implementation in each platform source set |
| Compose compiler version mismatch | Align Kotlin and Compose compiler versions in `libs.versions.toml` |
| Duplicate class | Check for conflicting dependencies with `./gradlew dependencies` |
| KSP error | Run `./gradlew kspCommonMainKotlinMetadata` to regenerate |
| Configuration cache issue | Check for non-serializable task inputs |