Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add aospbooks/aosp-internal-book --skill aosp-framework-coregit clone --depth 1 https://github.com/aospbooks/aosp-internal-bookWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/aospbooks/aosp-internal-book/aosp-framework-core)<a href="https://agentmods.dev/skills/aospbooks/aosp-internal-book/aosp-framework-core"><img src="https://agentmods.dev/badge/skills/aospbooks/aosp-internal-book/aosp-framework-core/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/aospbooks/aosp-internal-book/aosp-framework-core"><img src="https://agentmods.dev/badge/skills/aospbooks/aosp-internal-book/aosp-framework-core.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00156 | $0.00565 |
| Opus 5 | $0.00078 | $0.00282 |
| Sonnet 5 | $0.00031 | $0.00113 |
| Haiku 4.5 | $0.00016 | $0.00056 |
Grade A, and why
aosp-framework-core scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
This is a copy
100% identical to aosp-framework-core — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
What it actually says
AOSP Part VI — Framework Core
The Java/Kotlin layer running inside system_server that manages activities, windows, displays, and the View tree apps render into.
Chapters in this Part
20-system-server.md— SystemServer.java, the four boot phases, service registration, Watchdog, lifecycle management, shutdown sequence21-intent-system.md— Intent matching, IntentFilter, IntentResolver, PackageManager queries, package visibility, intent verification22-activity-and-window.md— ActivityTaskManagerService, WindowManagerService, activity lifecycle state machine, task/stack model, splash screens23-window-system.md— WindowState, SurfaceControl, input dispatching, focus tracking, IME insets, transitions24-display-system.md— DisplayManagerService, logical vs. physical displays, color modes, HDR, brightness curves, refresh-rate switching25-view-system.md— View hierarchy, measure/layout/draw, Canvas/RenderNode, hardware acceleration, accessibility hooks
When to load which chapter
- Question mentions system_server, boot phases, ServiceManager, Watchdog →
20-system-server.md - Question mentions Intent matching, IntentFilter, IntentResolver, package visibility →
21-intent-system.md - Question mentions ATM, WMS, activity lifecycle, splash screen, task/stack →
22-activity-and-window.md - Question mentions WindowState, SurfaceControl, input dispatch, focus, IME →
23-window-system.md - Question mentions DisplayManager, displays, HDR, refresh rate, brightness →
24-display-system.md - Question mentions View, ViewGroup, measure/layout/draw, Canvas, RenderNode →
25-view-system.md
What ships with it
6 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 9d ago First seen · 43 lines · 156 tokens per session scan A e1c2c47bf957
aosp-framework-core is a skill published in the GitHub repository aospbooks/aosp-internal-book (131 stars, last pushed 10d ago), licensed Apache-2.0. It adds 156 tokens to every session and 565 once invoked, about $0.0008 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to aosp-framework-core, differing in 0 lines, and is treated as a copy.
Other skills, from other repositories
orca-emulator-android
Android device and emulator control from inside Orca over adb, with the live device view in Orca's emulator pane. Use when driving an adb-connected emulator or phone on Windows, Linux, or macOS: booting AVDs, taps, swipes, typing, hardware buttons, rotation, app install and launch, runtime permissions, the…
android-tombstone-symbolication
Symbolicate the .NET runtime frames in an Android tombstone file. Extracts BuildIds and PC offsets from the native backtrace, downloads debug symbols from the Microsoft symbol server, and runs llvm-symbolizer to produce function names with source file and line numbers. USE FOR triaging a .NET MAUI or Mono Android app…
dogfood
Systematically explore and test a mobile app on iOS/Android with agent-device to find bugs, UX issues, and other problems. Use when asked to dogfood, QA, exploratory test, find issues, bug hunt, or test this app on mobile.
winapp-maui
Package and sign .NET MAUI Windows apps with winapp, resolving the resizetizer manifest dependency. Use when packaging or signing a .NET MAUI Windows app, building a MAUI MSIX or signed unpackaged build in CI, or fixing 'manifest contains unresolved placeholders ($placeholder$)' errors from winapp package.
apple-search-ads
When the user wants to set up, optimize, or scale Apple Search Ads (ASA) campaigns — including keyword bidding, match types, campaign structure, Creative Product Sets, CPP routing, and ROAS optimization. Use when the user mentions "Apple Search Ads", "ASA", "Search Ads", "Search tab ads", "Today tab ads", "CPT"…
android-pentest
A guide for authorized security testing of Android apps, covering APK inspection, runtime testing, traffic capture, code review, and function hooking. An APK is the installable package used by an Android app.