Android API Diff
gkd-kit/gkd
Looks up Android framework Java and AIDL APIs across versions with the android-api-diff CLI: signatures, availability, source files and hidden-API access code.
Analyzes Android build files and R8 keep rules to identify redundancies, broad package-wide rules, and rules that subsume library consumer keep rules.
Install R8 Analyzer
$ npx skills add arindamxd/camerax-android --skill r8-analyzer -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install arindamxd/camerax-android r8-analyzer --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/arindamxd/camerax-android.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/r8-analyzer .claude/skills/r8-analyzer && 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 "r8-analyzer" agent skill from https://github.com/arindamxd/camerax-android/tree/master/.agents/skills/r8-analyzer into .claude/skills/r8-analyzer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "r8-analyzer", 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/arindamxd/camerax-android/tree/master/.agents/skills/r8-analyzerType 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 arindamxd/camerax-android --skill r8-analyzer -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install arindamxd/camerax-android r8-analyzer --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/arindamxd/camerax-android.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/r8-analyzer .agents/skills/r8-analyzer && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "r8-analyzer" agent skill from https://github.com/arindamxd/camerax-android/tree/master/.agents/skills/r8-analyzer into .agents/skills/r8-analyzer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "r8-analyzer", 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 arindamxd/camerax-android --skill r8-analyzer -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install arindamxd/camerax-android r8-analyzer --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/arindamxd/camerax-android.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/r8-analyzer .cursor/skills/r8-analyzer && 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 "r8-analyzer" agent skill from https://github.com/arindamxd/camerax-android/tree/master/.agents/skills/r8-analyzer into .cursor/skills/r8-analyzer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "r8-analyzer", 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/arindamxd/camerax-android.git --path .agents/skills/r8-analyzer--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 arindamxd/camerax-android --skill r8-analyzer -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install arindamxd/camerax-android r8-analyzer --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/arindamxd/camerax-android.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/r8-analyzer .gemini/skills/r8-analyzer && 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 "r8-analyzer" agent skill from https://github.com/arindamxd/camerax-android/tree/master/.agents/skills/r8-analyzer into .gemini/skills/r8-analyzer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "r8-analyzer", 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 arindamxd/camerax-android r8-analyzerInstalls 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 arindamxd/camerax-android --skill r8-analyzer -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/arindamxd/camerax-android.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/r8-analyzer .github/skills/r8-analyzer && 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 "r8-analyzer" agent skill from https://github.com/arindamxd/camerax-android/tree/master/.agents/skills/r8-analyzer into .github/skills/r8-analyzer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "r8-analyzer", 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 arindamxd/camerax-android --skill r8-analyzer -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install arindamxd/camerax-android r8-analyzer --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/arindamxd/camerax-android.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/r8-analyzer .opencode/skills/r8-analyzer && 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 "r8-analyzer" agent skill from https://github.com/arindamxd/camerax-android/tree/master/.agents/skills/r8-analyzer into .opencode/skills/r8-analyzer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "r8-analyzer", 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
r8-analyzer- GitHub stars
- 132
- Used in
- 5 other repos
- Token cost
- ~1.1k tokens
- SKILL.md length
- 451 words
- Files
- 9 (incl. references)
- Skills in repo
- 21
- Repo updated
- First seen
- Licence
- Apache-2.0
At a glance
Analyzes Android build files and R8 keep rules to identify redundancies, broad package-wide rules, and rules that subsume library consumer keep rules.
- Works in 3 steps: Setup and configuration check → Analysis path selection → Report generation
- Developers want to optimize their apps size
- SKILL.md covers Step 1. Setup and…, Step 2. Analysis path selection, Step 3. Report generation and Constraints
- Calls python3
What it does
R8 Analyzer is an agent skill from arindamxd/camerax-android. Analyzes Android build files and R8 keep rules to identify redundancies, broad package-wide rules, and rules that subsume library consumer keep rules. Use when developers want to optimize their app's size, remove redundant or overly broad keep rules, or troubleshoot Proguard configurations.
Its SKILL.md is about 1.1k tokens, which your agent loads only when the skill is triggered. The skill folder holds 16 other files, including reference files (for example `references/CONFIGURATION-ANALYZER.md`, `references/CONFIGURATION.md` and `references/KEEP-RULES-IMPACT-HIERARCHY.md`).
It sits in Mobile. It works with Android, Gradle and Python. The repository describes itself as: A Play Store camera app showing Jetpack CameraX APIs in Kotlin — install it, use it, copy the patterns. The licence is Apache-2.0.
When your agent uses it
- Developers want to optimize their apps size
- Remove redundant
- Overly broad keep rules
- Troubleshoot Proguard configurations
Example prompts
- “Use the r8-analyzer skill to analyz Android build files and R8 keep rules to identify redundancies, broad package-wide rules, and rules that subsume…”
- “/r8-analyzer”
Requirements
- Python 3
Workflow steps
3 steps, taken from the step headings in SKILL.md.
What it can do on your machine
Read from SKILL.md and the folder at commit 7c36352. 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
Shell commands in SKILL.md call:
python3
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
R8 Analyzer loads about 1.1k tokens when it runs, and up to ~18k if it reads all its reference files. Until then it costs about 76 tokens; SKILL.md has 451 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 arindamxd/camerax-android at commit 7c36352, republished under its Apache-2.0 licence (© arindamxd). 451 words, ~1,137 tokens.
Download SKILL.mdSave it as
.claude/skills/r8-analyzer/SKILL.md (or your agent's skills folder). This skill also uses 8 other files; get the full folder from GitHub.- name
- r8-analyzer
- description
- Analyzes Android build files and R8 keep rules to identify redundancies, broad package-wide rules, and rules that subsume library consumer keep rules. Use when developers want to optimize their app's size, remove redundant or overly broad keep rules, or troubleshoot Proguard configurations.
- license
- Complete terms in LICENSE.txt
- metadata.author
- Google LLC
- metadata.last-updated
- 2026-08-06
- metadata.keywords
- R8, proguard, keep rules, app size, optimization
Step 1. Setup and configuration check
- Inspect
build.gradle,build.gradle.kts, andgradle.properties. - Use references/CONFIGURATION.md to identify missing optimizations.
- AGP : If version is lower than 9.0, suggest migration to 9.0 for build-time performance improvement.
- Full Mode : Verify
android.enableR8.fullMode=falseis removed from gradle.properties.
Step 2. Analysis path selection
Inspect
build.gradle,build.gradle.kts, andgradle.propertiesandlibs.versions.tomlto get the AGP and R8 versions.If AGP >= 9.3.0 : Proceed to Path A (Standalone Task).
If AGP < 9.3.0 and R8 >= 9.3.7-dev : Proceed to Path B (Quantitative).
If none of the conditions are met, proceed to Path C (Heuristic).
Path A: Standalone Gradle task (AGP >= 9.3.0)
- Step 1: Run standalone task : Run
./gradlew :app:analyzeReleaseR8Configto evaluate the R8 configuration. You MUST wait for this command to finish before proceeding. - Step 2: Convert to JSON : The report is generated at
app/build/reports/r8/r8-config-analyzer-release.pb. You MUST explicitly run the conversion script by executing:python3 .agents/skills/r8-analyzer/scripts/convert_pb_to_json.py. Wait for this command to finish. - Step 3: Analyze : You MUST explicitly run the analysis script by executing:
python3 .agents/skills/r8-analyzer/scripts/analyze.py. This outputstmp/keepradius/analysis_result.txt. Wait for this command to finish.
Path B: Quantitative data generation (R8 >= 9.3.7-dev and AGP < 9.3.0)
- Step 1: Check requirements : Python and
protobufpackage are mandatory. - Step 2: Generate and analyze : You MUST run the shell commands described in references/CONFIGURATION-ANALYZER.md to generate the proto file using R8 configuration analyzer, convert it to JSON and analyze the result.
- Step 3: Analyze : You MUST ensure the analysis produces
tmp/keepradius/analysis_result.txtfor scores and rule impact metrics.
Show full SKILL.md (212 more words)Show less
Path C: Heuristic evaluation and recommendation (R8 < 9.3.7-dev)
(Use ONLY if quantitative data generation is not possible)
- Step 1: Manual evaluation : Inspect
proguard-rules.pro. - Step 2: Library check : Compare rules against references/REDUNDANT-RULES.md. Suggest Remove for bundled rules.
- Step 3: Custom rule check : Use references/KEEP-RULES-IMPACT-HIERARCHY.md and references/REFLECTION-GUIDE.md to prioritize and evaluate. Suggest Refine for broad rules (for example, package-wide).
- Step 4: Validation : Suggest Macrobenchmark tests using UI Automator for any proposed changes. Proceed to Step 3.
Step 3. Report generation
- Format : Follow references/REPORT_FORMAT.md strictly.
- Input: Extract metrics (Scores, Impacts, Example Classes) directly from generated file analysis.txt if using Path A, or from manual findings if using Path B.
- Output : Output ONLY the raw Markdown report in the chat. Do NOT output conversational filler (for example, "Here is your report..."). Do NOT provide recommendations, next steps, or any other text outside of the sections defined in references/REPORT_FORMAT.md Do NOT mention the path used for analysis of the configuration
Constraints
- Strict output limit: The final output MUST strictly be the Markdown report and nothing else.
- No code changes: Research and suggest only; Do not modify files.
- No redundancy: Do not explain R8 benefits or reference skill internal files in the report.
- Focus: Omit sections (for example, Subsumed Rules, Configuration) if no issues or items are found.
© arindamxd, 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
SKILL.md and 8 other files (references) in .agents/skills/r8-analyzer of arindamxd/camerax-android.
- SKILL.md
- references/CONFIGURATION-ANALYZER.md
- references/CONFIGURATION.md
- references/KEEP-RULES-IMPACT-HIERARCHY.md
- references/REDUNDANT-RULES.md
- references/REFLECTION-GUIDE.md
- references/REPORT_FORMAT.md
- references/android/topic/performance/app-optimization/enable-app-optimization.md
- references/android/training/testing/other-components/ui-automator.md
Open the folder on GitHubat commit 7c36352
Used in 5 other repositories
We found 9 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 5 other GitHub owners. This page covers the copy in arindamxd/camerax-android, which our catalogue first saw on October 7, 2026.
- rosuH/EasyWatermarkskills/r8-analyzer.agents/skills/r8-analyzer+1 more
- jameshnsears/QuoteUnquote.agents/skills/r8-analyzer
- klxiaoniu/QQVersionList.agents/skills/r8-analyzer
- android/skillsperformance/r8-analyzer
- hanamizuki/solopreneurskills/android-dev/r8-analyzerplugins/codex/android-dev/skills/r8-analyzer+1 more
Compare with similar skills
R8 Analyzer 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 |
|---|---|---|---|---|---|---|
| R8 Analyzer this skillarindamxd/camerax-android | 132 | 5 repos | ~1.1k | Automated safety check: Pass | Apache-2.0 | |
| Android API Diffgkd-kit/gkd | 43k | — | ~796 | Automated safety check: Pass | GPL-3.0 | |
| Mobilerun Docs Referencedroidrun/mobilerun | 9.6k | — | ~943 | Automated safety check: Pass | MIT | |
| Phoneagentrounak/PhoneAgent | 798 | — | ~2.2k | Automated safety check: Pass | MIT | |
| Android Developmentdpconde/claude-android-skill | 336 | — | ~1.7k | Automated safety check: Pass | MIT | |
| Run Jetpack Android Appwordpress-mobile/WordPress-Android | 3.2k | — | ~886 | Automated safety check: Pass | GPL-2.0 |
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Questions about R8 Analyzer
What does R8 Analyzer do?
Analyzes Android build files and R8 keep rules to identify redundancies, broad package-wide rules, and rules that subsume library consumer keep rules. R8 Analyzer is an agent skill from arindamxd/camerax-android. Analyzes Android build files and R8 keep rules to identify redundancies, broad package-wide rules, and rules that subsume library consumer keep rules.
When should I use R8 Analyzer?
R8 Analyzer fits situations like: developers want to optimize their apps size; remove redundant; overly broad keep rules; troubleshoot Proguard configurations.
How do I install R8 Analyzer in Claude Code?
Run `npx skills add arindamxd/camerax-android --skill r8-analyzer -a claude-code`. Or copy the skill folder (.agents/skills/r8-analyzer in arindamxd/camerax-android) into .claude/skills/r8-analyzer in your project. Claude Code loads it when a task matches its description.
How do I install R8 Analyzer in Codex?
Run `npx skills add arindamxd/camerax-android --skill r8-analyzer -a codex`. Or copy the skill folder (.agents/skills/r8-analyzer in arindamxd/camerax-android) into .agents/skills/r8-analyzer in your project. Codex loads it when a task matches its description.
Can I use R8 Analyzer 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 arindamxd/camerax-android --skill r8-analyzer -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/r8-analyzer, .gemini/skills/r8-analyzer, .github/skills/r8-analyzer and .opencode/skills/r8-analyzer in your project.
What does R8 Analyzer need to run?
Going by SKILL.md and its folder, R8 Analyzer needs the command-line tools its instructions call (python3). Our summary lists: Python 3.
Does R8 Analyzer 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 R8 Analyzer 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 R8 Analyzer use?
R8 Analyzer 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 R8 Analyzer use?
About 1.1k tokens (SKILL.md is roughly 4.5k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 17k tokens, read only when the agent opens those files.
What are the alternatives to R8 Analyzer?
Skills that share tags, products or a category with R8 Analyzer: Android API Diff (gkd-kit/gkd, 43k stars), Mobilerun Docs Reference (droidrun/mobilerun, 9.6k stars), Phoneagent (rounak/PhoneAgent, 798 stars) and Android Development (dpconde/claude-android-skill, 336 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains R8 Analyzer?
arindamxd (a GitHub user) maintains it in arindamxd/camerax-android, which has 132 GitHub stars. The repository holds 21 skills in this directory. The repository was last updated on October 2, 2026.
Source: arindamxd/camerax-android on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.