Compose Multiplatform Patterns
monta-app/ocpp-emulator
Compose Multiplatform and Jetpack Compose patterns for KMP projects — state management, navigation, theming, performance, and platform-specific UI.
AOSP Part IX — Security. An agent skill from aospbooks/aosp-internal-book.
Install Aosp Security
$ npx skills add aospbooks/aosp-internal-book --skill aosp-security -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install aospbooks/aosp-internal-book aosp-security --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/aospbooks/aosp-internal-book.git skills-src && mkdir -p .claude/skills && cp -r skills-src/agents/_content/parts/security .claude/skills/aosp-security && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "aosp-security" agent skill from https://github.com/aospbooks/aosp-internal-book/tree/main/agents/_content/parts/security into .claude/skills/aosp-security/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "aosp-security", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/aospbooks/aosp-internal-book/tree/main/agents/_content/parts/securityType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add aospbooks/aosp-internal-book --skill aosp-security -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install aospbooks/aosp-internal-book aosp-security --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aospbooks/aosp-internal-book.git skills-src && mkdir -p .agents/skills && cp -r skills-src/agents/_content/parts/security .agents/skills/aosp-security && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "aosp-security" agent skill from https://github.com/aospbooks/aosp-internal-book/tree/main/agents/_content/parts/security into .agents/skills/aosp-security/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "aosp-security", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add aospbooks/aosp-internal-book --skill aosp-security -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install aospbooks/aosp-internal-book aosp-security --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aospbooks/aosp-internal-book.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/agents/_content/parts/security .cursor/skills/aosp-security && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "aosp-security" agent skill from https://github.com/aospbooks/aosp-internal-book/tree/main/agents/_content/parts/security into .cursor/skills/aosp-security/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "aosp-security", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/aospbooks/aosp-internal-book.git --path agents/_content/parts/security--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add aospbooks/aosp-internal-book --skill aosp-security -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install aospbooks/aosp-internal-book aosp-security --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aospbooks/aosp-internal-book.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/agents/_content/parts/security .gemini/skills/aosp-security && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "aosp-security" agent skill from https://github.com/aospbooks/aosp-internal-book/tree/main/agents/_content/parts/security into .gemini/skills/aosp-security/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "aosp-security", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install aospbooks/aosp-internal-book aosp-securityInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add aospbooks/aosp-internal-book --skill aosp-security -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/aospbooks/aosp-internal-book.git skills-src && mkdir -p .github/skills && cp -r skills-src/agents/_content/parts/security .github/skills/aosp-security && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "aosp-security" agent skill from https://github.com/aospbooks/aosp-internal-book/tree/main/agents/_content/parts/security into .github/skills/aosp-security/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "aosp-security", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add aospbooks/aosp-internal-book --skill aosp-security -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install aospbooks/aosp-internal-book aosp-security --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aospbooks/aosp-internal-book.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/agents/_content/parts/security .opencode/skills/aosp-security && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "aosp-security" agent skill from https://github.com/aospbooks/aosp-internal-book/tree/main/agents/_content/parts/security into .opencode/skills/aosp-security/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "aosp-security", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
aosp-security- GitHub stars
- 139
- Token cost
- ~491 tokens
- SKILL.md length
- 128 words
- Files
- 1
- Skills in repo
- 17
- Repo updated
- First seen
- Licence
- Apache-2.0
At a glance
AOSP Part IX — Security. An agent skill from aospbooks/aosp-internal-book.
- Reasoning about SELinux on Android
- SKILL.md covers Chapters in this Part and When to load which chapter
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Keystore/Keymint
What it does
Aosp Security is an agent skill from aospbooks/aosp-internal-book. 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 credentials), or DRM (MediaDrm framework, Widevine L1/L2/L3, OEMCrypto, license acquisition, secure decoder/display path), or the LFI in-process sandbox (Lightweight Fault Isolation for untrusted code such as…
Its SKILL.md is about 490 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Mobile. It works with Android. The repository describes itself as: The book introduces the internal of AOSP. The licence is Apache-2.0.
When your agent uses it
- Reasoning about SELinux on Android
- Keystore/Keymint
- Gatekeeper/weaver
- Android Verified Boot
Example prompts
- “/aosp-security”
What it can do on your machine
Read from SKILL.md and the folder at commit fc0b48b. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Aosp Security loads about 491 tokens when it runs. Until then it costs about 142 tokens; SKILL.md has 128 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from aospbooks/aosp-internal-book at commit fc0b48b, republished under its Apache-2.0 licence (© aospbooks). 128 words, ~491 tokens.
Download SKILL.mdSave it as
.claude/skills/aosp-security/SKILL.md (or your agent's skills folder).- name
- aosp-security
- description
- 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 credentials), or DRM (MediaDrm framework, Widevine L1/L2/L3, OEMCrypto, license acquisition, secure decoder/display path), or the LFI in-process sandbox (Lightweight Fault Isolation for untrusted code such as software codecs). Chapters 40–42, 68.
- metadata.author
- utzcoz
- metadata.version
- 2026.06.24
- metadata.last-updated
- 2026-10-05
AOSP Part IX — Security
Trust roots, key storage, credential management, and content protection.
Chapters in this Part
40-security.md— SELinux on Android, Keystore/Keymint, Trusty TEE, gatekeeper/weaver, AVB, dm-verity, hardware-backed attestation41-credential-manager.md— CredentialManagerService, credential providers, passkeys/FIDO2, password and autofill integration, digital credentials42-drm.md— MediaDrm framework, Widevine L1/L2/L3, OEMCrypto, license acquisition, secure decoder/display path43-lfi-sandbox.md— Lightweight Fault Isolation: memory-safe in-process sandboxing for untrusted code (software codecs) without a separate process; the external/lfi verifier and runtime, the Soong LFI toolchain, and the libapexcodecs/codec2 integration
When to load which chapter
- Question mentions SELinux, Keystore, Keymint, Trusty, gatekeeper, weaver, AVB, attestation →
40-security.md - Question mentions Credential Manager, passkeys, FIDO2, autofill, digital credentials →
41-credential-manager.md - Question mentions MediaDrm, Widevine, OEMCrypto, secure decoder, license server →
42-drm.md - Question mentions LFI, lightweight fault isolation, in-process sandboxing, sandboxed software codec →
43-lfi-sandbox.md
© aospbooks, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in agents/_content/parts/security of aospbooks/aosp-internal-book.
Open the folder on GitHubat commit fc0b48b
Compare with similar skills
Aosp Security next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Aosp Security this skillaospbooks/aosp-internal-book | 139 | — | ~491 | Automated safety check: Pass | Apache-2.0 | |
| Compose Multiplatform Patternsmonta-app/ocpp-emulator | 180 | 5 repos | ~2k | Automated safety check: Pass | Apache-2.0 | |
| Phone HarnessShawnPana/phone-harness | 3.2k | — | ~4.3k | Automated safety check: Pass | MIT | |
| Stylesarindamxd/camerax-android | 132 | 4 repos | ~2.3k | Automated safety check: Pass | Apache-2.0 | |
| Verified Emailarindamxd/camerax-android | 132 | 4 repos | ~4.7k | Automated safety check: Pass | Apache-2.0 | |
| Argent Metro Debuggerbbplayer-app/BBPlayer | 1.2k | — | ~3.4k | Automated safety check: Pass | MIT |
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All 17 skills in this repoBook Writer
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Patterns for writing technical book chapters in Markdown with Mermaid diagrams, served via ProperDocs (a MkDocs fork).
Aosp Version Diff
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Compare two AOSP releases (e.g. An agent skill from aospbooks/aosp-internal-book.
Aosp Device Support
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Aosp Framework Services
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Aosp Native Services And Media
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AOSP Part IV — Native Services & Media. An agent skill from aospbooks/aosp-internal-book.
Related
Works with
Categories
Questions about Aosp Security
What does Aosp Security do?
AOSP Part IX — Security. An agent skill from aospbooks/aosp-internal-book. Aosp Security is an agent skill from aospbooks/aosp-internal-book. AOSP Part IX — Security.
When should I use Aosp Security?
Aosp Security fits situations like: reasoning about SELinux on Android; keystore/Keymint; gatekeeper/weaver; android Verified Boot.
How do I install Aosp Security in Claude Code?
Run `npx skills add aospbooks/aosp-internal-book --skill aosp-security -a claude-code`. Or copy the skill folder (agents/_content/parts/security in aospbooks/aosp-internal-book) into .claude/skills/aosp-security in your project. Claude Code loads it when a task matches its description.
How do I install Aosp Security in Codex?
Run `npx skills add aospbooks/aosp-internal-book --skill aosp-security -a codex`. Or copy the skill folder (agents/_content/parts/security in aospbooks/aosp-internal-book) into .agents/skills/aosp-security in your project. Codex loads it when a task matches its description.
Can I use Aosp Security in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add aospbooks/aosp-internal-book --skill aosp-security -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/aosp-security, .gemini/skills/aosp-security, .github/skills/aosp-security and .opencode/skills/aosp-security in your project.
What does Aosp Security need to run?
SKILL.md names no scripts, command-line tools or credentials: Aosp Security is instructions for the agent only.
Does Aosp Security access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Aosp Security safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Aosp Security use?
Aosp Security is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Aosp Security use?
About 491 tokens (SKILL.md is roughly 2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Aosp Security?
Skills that share tags, products or a category with Aosp Security: Compose Multiplatform Patterns (monta-app/ocpp-emulator, 180 stars), Phone Harness (ShawnPana/phone-harness, 3.2k stars), Styles (arindamxd/camerax-android, 132 stars) and Verified Email (arindamxd/camerax-android, 132 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Aosp Security?
aospbooks (a GitHub organization) maintains it in aospbooks/aosp-internal-book, which has 139 GitHub stars. The repository holds 17 skills in this directory. The repository was last updated on October 5, 2026.
Source: aospbooks/aosp-internal-book on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.