https://developer.android.com/agents/skills/performance/r8-analyzer/skill

What problem does it solve?

This Skill helps you identify which ProGuard/R8 keep rules unnecessarily block optimizations, so your Android app can reclaim shrinking, obfuscation, and optimization opportunities.

Core Features & Use Cases

• Configuration validation: Checks Gradle and R8 settings for common performance blockers (e.g., AGP version, full mode flags).
• Quantitative analysis path: Uses the R8 configuration analyzer to generate an evidence-based report of keep-rule impact when the R8 version meets requirements.
• Heuristic fallback path: When quantitative analysis isn’t possible, evaluates keep rules manually for redundancy and breadth using provided reference guidance.
• Strict reporting output: Produces a raw Markdown report following the required report schema for consistent review and tracking.

Use Case: You have a large proguard-rules.pro and want to remove or refine keep rules that are reducing R8 effectiveness, while ensuring reflective and runtime-loaded code still works.

Quick Start

Ask the skill to analyze your project’s R8 configuration and keep rules and return the strict Markdown report with optimization, obfuscation, and shrinking impact.