aosp-native-services-and-media

aosp-native-services-and-media is a skill for Claude Code, Codex from aospbooks/aosp-internal-book. It costs 149 tokens per session (593 once invoked), scanned A, original, Apache-2.0.

A reference guide to Android's native services for graphics, audio, video, cameras, and sensors. It also explains the pipelines and system interfaces these services use, including SurfaceFlinger, media codecs, and hardware abstraction layers.

In plain words
What is it for?
Use it to investigate native daemon startup, graphics composition, animations, audio routing, media and camera processing, sensors, BufferQueue, Vulkan, Skia, or related hardware interfaces.
Why use it?
It helps developers trace how Android turns app requests into rendered frames, audio output, camera data, video playback, or sensor events.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to investigate native daemon startup, graphics composition, animations, audio routing, media and camera processing, sensors, BufferQueue, Vulkan, Skia, or related hardware interfaces.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/aospbooks/aosp-internal-book/native-services-and-media
Install

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.

Any agent
npx skills add aospbooks/aosp-internal-book --skill native-services-and-media
Clone the repo
git clone --depth 1 https://github.com/aospbooks/aosp-internal-book

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for aosp-native-services-and-media

README.md
[![agentmods](https://agentmods.dev/badge/skills/aospbooks/aosp-internal-book/native-services-and-media/github.svg)](https://agentmods.dev/skills/aospbooks/aosp-internal-book/native-services-and-media)
Your own site
<a href="https://agentmods.dev/skills/aospbooks/aosp-internal-book/native-services-and-media"><img src="https://agentmods.dev/badge/skills/aospbooks/aosp-internal-book/native-services-and-media/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.

agentmods 80×15 button for aosp-native-services-and-media

Your own site · 80×15
<a href="https://agentmods.dev/skills/aospbooks/aosp-internal-book/native-services-and-media"><img src="https://agentmods.dev/badge/skills/aospbooks/aosp-internal-book/native-services-and-media.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 149 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 593 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00149 $0.00593
Opus 5 $0.00075 $0.00296
Sonnet 5 $0.00030 $0.00119
Haiku 4.5 $0.00015 $0.00059

Measured 12d ago against content hash b2d6d526a0b8, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

aosp-native-services-and-media 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 12d 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

agents/_content/parts/native-services-and-media/SKILL.md · 41 lines

What it actually says

AOSP Part IV — Native Services & Media

The native daemons that run continuously and own audio, video, sensors, and the graphics composition pipeline.

Chapters in this Part

  • 12-native-services.md — surfaceflinger, audioserver, mediaserver, cameraserver process layout, init triggers, AIDL boundaries, HAL clients
  • 13-graphics-render-pipeline.md — SurfaceFlinger, BufferQueue, GraphicBuffer, OpenGL ES / Vulkan / Skia / HWUI, RenderThread, layer composition
  • 14-animation-system.md — Choreographer, ValueAnimator/ObjectAnimator, RenderNode animations, dynamic animation, shared-element transitions
  • 15-audio-system.md — AudioFlinger, AudioPolicyManager, audio HAL, AAudio/OpenSL ES, spatial audio (Spatializer), routing rules
  • 16-media-and-camera.md — MediaCodec, MediaExtractor, NuPlayer, codec2 HAL, camera service, image/video pipeline overview
  • 17-sensors.md — SensorService, sensor HAL, batching, wake-up sensors, FIFO and event delivery, sensor fusion

When to load which chapter

  • Question is about which native daemons exist or how they boot → 12-native-services.md
  • Question mentions SurfaceFlinger, BufferQueue, GraphicBuffer, OpenGL/Vulkan/Skia/HWUI, RenderThread, composition → 13-graphics-render-pipeline.md
  • Question mentions Choreographer, animator classes, RenderNode animations, springs/flings → 14-animation-system.md
  • Question mentions AudioFlinger, AudioPolicyManager, AAudio, OpenSL ES, Spatializer → 15-audio-system.md
  • Question mentions MediaCodec, MediaExtractor, NuPlayer, codec2, camera service → 16-media-and-camera.md
  • Question mentions sensors, SensorService, wake-up sensors, batching → 17-sensors.md
Changes

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.

  1. 12d ago First seen · 41 lines · 149 tokens per session scan A b2d6d526a0b8

Subscribe to this mod's changes

aosp-native-services-and-media is a skill published in the GitHub repository aospbooks/aosp-internal-book (131 stars, last pushed 13d ago), licensed Apache-2.0. It adds 149 tokens to every session and 593 once invoked, about $0.0007 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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