build: slim arm64-only release APK (~53% smaller) + universal fallback - #331
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SMK1705
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Jul 29, 2026
SMK1705
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…iversal fallback The published APK is ~199 MB, and 64% of it is native libs shipped for THREE ABIs. A real phone downloads x86_64 (64 MB, emulator/ChromeOS only) and armeabi-v7a (42 MB, old 32-bit ARM) it can never use — every phone since ~2019 is arm64-v8a. - build.gradle.kts: -PslimAbi narrows the packaged ABIs to arm64-v8a only. Default keeps all three, so the x86_64 emulator and 32-bit devices still work for local/CI testing; only the published/installed builds opt in. - release-apk.yml: build BOTH — a universal all-ABI APK (fallback) and the slim arm64 one, publishing the slim build at the stable taskmind-debug.apk URL (what modern phones use) and the universal as taskmind-universal-debug.apk. A non-arm64 device can't install an arm64-only APK (INSTALL_FAILED_NO_MATCHING_ABIS is a clean install-time refusal, not a crash), so the universal fallback keeps 32-bit ARM / x86 / emulators covered. - install-to-phone.yml: -PslimAbi (the paired phone is arm64) — less to build/transfer/install. Measured: taskmind-debug.apk 199 MB -> 92.8 MB (arm64-only, ~53% smaller). Device-verified on the Galaxy S25 (arm64): installs, SQLCipher decrypts the DB, and the MediaPipe neural embedder loads from lib/arm64-v8a and runs (tflite + XNNPACK) — no feature lost. CI (android.yml) still builds the default universal APK, so the multi-ABI path stays covered.
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