Summary

• install Android SDK components lazily by capability, ensuring adb up front and deferring emulator and AVD provisioning until those flows actually need them
• stop bootstrapping Android command-line tools when requested packages are already present, and keep install logging for auto-installed SDK components
• add regression coverage for device-only installs, emulator installs, discovery installs, and running-emulator attach behavior

Testing

• pnpm vitest run src/tests/environment.test.ts src/tests/instance.test.ts src/tests/adb.test.ts src/tests/targets.test.ts
• pnpm exec tsc --noEmit
• pnpm exec eslint src/environment.ts src/runner.ts src/targets.ts src/adb.ts src/instance.ts src/tests/environment.test.ts src/tests/instance.test.ts src/tests/targets.test.ts