Skill Claude CodeCodex
AOSP Part XIV — Device Support. Use when reasoning about per-architecture support (ARM 32/64, x8664, RISC-V, ABI matrix, toolchains), the QEMU-based Android emulator (AVD format, hardware acceleration, guest kernel), DevicePolicyManager (work profiles, fully-managed devices, COPE, enrollment), Android Automotive / TV…
Skill Claude CodeCodex
AOSP Part VI — Framework Core. Use when reasoning about systemserver's boot sequence (the four boot phases, service registration, Watchdog), the Intent system (Intent matching, IntentFilter, IntentResolver, package visibility, intent verification), Activity & Window Management (ActivityTaskManagerService…
Skill Claude CodeCodex
AOSP Part VII — Framework Services. Use when reasoning about PackageManagerService (install/uninstall, APK parsing, permissions, package visibility), ContentProviders (ContentResolver, URI permissions, observers, FileProvider, MediaStore), Notifications (NMS, channels, ranker, posting/delivery, listener services…
Skill Claude CodeCodex
AOSP Part I — Getting Started. Use when reasoning about the AOSP source tree at a high level, the repo/manifest workflow, the Soong (Android.bp) and Bazel/Kleaf build systems, lunch targets, the m build entry point, or aconfig feature flags (build-time vs. runtime, release configs, ramp/cleanup workflows). Chapters…
Skill Claude CodeCodex
AOSP Part XIII — Infrastructure. Use when reasoning about Mainline modules / APEX (Project Mainline, APEX format/manifest/signing, apexd, module catalog, SDK Extensions, module boundaries), OTA updates (A/B updates, updateengine, payload format, Virtual A/B with snapshots, rollback protection), Virtualization (Android…
Skill Claude CodeCodex
AOSP Part II — Kernel & Boot. Use when reasoning about Android's bootloader handoff, init.rc / first-stage init / second-stage init, the Generic Kernel Image (GKI) and KMI stability, dm-verity / Android Verified Boot, the kernel's Android-specific subsystems (binder driver, ashmem→memfd, low-memory killer, PSI)…
Skill Claude CodeCodex
AOSP Part III — Native Foundation. Use when reasoning about Bionic (Android's libc/libm/libdl) and the dynamic linker, linker namespaces, GWP-ASan / MTE, memory management (jemalloc/scudo, ashmem/memfd, ION/dma-buf, lmkd, PSI), Binder IPC (transactions, parcels, one-copy semantics, AIDL/HIDL/NDK Binder…
Skill Claude CodeCodex
AOSP Part IV — Native Services & Media. Use when reasoning about surfaceflinger, audioserver, mediaserver, cameraserver, the graphics pipeline (BufferQueue, GraphicBuffer, OpenGL ES / Vulkan / Skia / HWUI, RenderThread, layer composition), the animation system (Choreographer, ValueAnimator, RenderNode animations…
Skill Claude CodeCodex
AOSP Part XV — Practical. Use when reasoning about building a custom AOSP ROM end-to-end: picking a target device, syncing source, applying vendor blobs, branding, building, flashing the resulting images, and shipping OTA updates on your own channel. Chapter 65 (Custom ROM Guide).
Skill Claude CodeCodex
AOSP Part V — Runtime. Use when reasoning about ART (dex2oat, AOT/JIT, baseline profiles, GC, oat/vdex/odex files, class loaders, JNI bridge) or the Native Bridge (Berberis, Houdini, cross-architecture native code execution, intercepting libc/JNI calls). Chapters 18–19.
Skill Claude CodeCodex
AOSP Part IX — Security. Use when reasoning about SELinux on Android, Keystore/Keymint, Trusty TEE, gatekeeper/weaver, Android Verified Boot, dm-verity, hardware-backed attestation, Credential Manager (CredentialManagerService, credential providers, passkeys/FIDO2, password and autofill integration, digital…
Skill Claude CodeCodex
AOSP Part XI — System Apps. Use when reasoning about SystemUI (status bar, notification shade, keyguard, Quick Settings, Monet/dynamic color), Launcher3 (model loader, Recents/Overview, gesture nav, all-apps, predictions, work profile), or the Settings app (SettingsProvider, SettingsLib, search index, slice surface).…
Skill Claude CodeCodex
AOSP Part X — UI Framework. Use when reasoning about Widgets and RemoteViews (AppWidget framework, RemoteViews, RemoteCompose, host/provider model), WebView (WebView Mainline module, Chromium content layer, renderer process, JS bridges, sandboxing), Accessibility (AccessibilityService, AccessibilityNodeInfo, TalkBack…
Instructions file GitHub Copilot
Instructions for aospbooks/aosp-internal-book: Per-Part background lives in .github/instructions/aosp- .instructions.md. Copilot loads each one based on its applyTo glob; the descriptions in those files mark which AOSP subsystem they cover.