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.
Build, configure, and troubleshoot GraalVM Native Image applications.
OfficialUPL-1.0Auto-check passed
Install Graal
$ npx skills add oracle/skills --skill graal -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install oracle/skills graal --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/oracle/skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/graal .claude/skills/graal && 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 "graal" agent skill from https://github.com/oracle/skills/tree/main/graal into .claude/skills/graal/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "graal", 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/oracle/skills/tree/main/graalType 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 oracle/skills --skill graal -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install oracle/skills graal --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/oracle/skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/graal .agents/skills/graal && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "graal" agent skill from https://github.com/oracle/skills/tree/main/graal into .agents/skills/graal/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "graal", 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 oracle/skills --skill graal -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install oracle/skills graal --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/oracle/skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/graal .cursor/skills/graal && 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 "graal" agent skill from https://github.com/oracle/skills/tree/main/graal into .cursor/skills/graal/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "graal", 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/oracle/skills.git --path graal--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 oracle/skills --skill graal -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install oracle/skills graal --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/oracle/skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/graal .gemini/skills/graal && 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 "graal" agent skill from https://github.com/oracle/skills/tree/main/graal into .gemini/skills/graal/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "graal", 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 oracle/skills graalInstalls 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 oracle/skills --skill graal -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/oracle/skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/graal .github/skills/graal && 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 "graal" agent skill from https://github.com/oracle/skills/tree/main/graal into .github/skills/graal/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "graal", 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 oracle/skills --skill graal -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install oracle/skills graal --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/oracle/skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/graal .opencode/skills/graal && 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 "graal" agent skill from https://github.com/oracle/skills/tree/main/graal into .opencode/skills/graal/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "graal", 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
graal- GitHub stars
- 873
- Token cost
- ~720 tokens
- SKILL.md length
- 204 words
- Files
- 5
- Skills in repo
- 15
- Repo updated
- First seen
- Licence
- UPL-1.0
At a glance
Build, configure, and troubleshoot GraalVM Native Image applications.
- Works in 3 steps: Start with the routing table below. → Read only the specific Native Image file… → Prefer Native Build Tools for Maven or…
- Native-image CLI builds
- SKILL.md covers How to Use This Domain, Directory Structure, Category Routing and Key Starting Points, plus 2 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Graal is an agent skill from oracle/skills, published by the product's own GitHub organization. Build, configure, and troubleshoot GraalVM Native Image applications. Use this skill for native-image CLI builds, Maven or Gradle Native Build Tools, reachability metadata, and build or run time issue diagnosis.
Its SKILL.md is about 720 tokens, which your agent loads only when the skill is triggered. The skill folder holds 5 other files (for example `native-image/build-native-image.md`, `native-image/native-build-tools.md` and `native-image/reachability-metadata.md`).
It works with Gradle and Java. The repository describes itself as: Oracle Skills is a curated, open-source collection of practical, installable skills for working with Oracle technologies. It provides developers, administrators, and AI agents…
When your agent uses it
- Native-image CLI builds
- Gradle Native Build Tools
- Reachability metadata
- Run time issue diagnosis
Example prompts
- “/graal”
Workflow steps
3 steps, taken from the first numbered list in SKILL.md.
- Start with the routing table below.
- Read only the specific Native Image file needed for the task.
- Prefer Native Build Tools for Maven or Gradle projects. Use the raw native-image workflow for simple Java files or direct CLI usage.
What it can do on your machine
Read from SKILL.md and the folder at commit 6c57a52. 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
Links to these hosts (documentation or services it may open):
github.comgraalvm.org
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
Graal loads about 720 tokens when it runs. Until then it costs about 54 tokens; SKILL.md has 204 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
Its licence (UPL-1.0) doesn't allow us to republish the file, so here is its outline and opening line. It has 204 words (~720 tokens).
“Use this domain to build, configure, and troubleshoot GraalVM Native Image applications with Maven, Gradle, or the CLI.”
- name
- graal
Files
SKILL.md and 4 other files in graal of oracle/skills.
- SKILL.md
- native-image/build-native-image.md
- native-image/native-build-tools.md
- native-image/reachability-metadata.md
- native-image/troubleshooting.md
Open the folder on GitHubat commit 6c57a52
Compare with similar skills
Graal 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 |
|---|---|---|---|---|---|---|
| Graal this skilloracle/skills | 873 | — | ~720 | Automated safety check: Pass | UPL-1.0 | |
| Android API Diffgkd-kit/gkd | 43k | — | ~796 | Automated safety check: Pass | GPL-3.0 | |
| Caffeine Cache Optimization Experimentsben-manes/caffeine | 18k | — | ~2.6k | Automated safety check: Notes | Apache-2.0 | |
| Groovy 5 Developer Guideapache/grails-core | 2.9k | — | ~3k | Automated safety check: Pass | Apache-2.0 | |
| Jspecify Skillsivaprasadreddy/sivalabs-agent-skills | 188 | — | ~1.2k | Automated safety check: Pass | MIT | |
| Minecraft CI ReleaseJahrome907/minecraft-agent-skills | 166 | — | ~3.6k | Automated safety check: Pass | MIT |
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Groovy 5 Developer Guide
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Guidance for Groovy 5 work in Grails projects: syntax, closures, traits, DSLs, metaprogramming, Spock tests, static compilation and Java 21 integration.
Jspecify Skill
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Minecraft CI Release
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Release
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Bump the sol4k library version everywhere, open a release PR, and draft GitHub release notes.
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Related
Questions about Graal
What does Graal do?
Build, configure, and troubleshoot GraalVM Native Image applications. Graal is an agent skill from oracle/skills, published by the product's own GitHub organization. Build, configure, and troubleshoot GraalVM Native Image applications.
When should I use Graal?
Graal fits situations like: native-image CLI builds; gradle Native Build Tools; reachability metadata; run time issue diagnosis.
How do I install Graal in Claude Code?
Run `npx skills add oracle/skills --skill graal -a claude-code`. Or copy the skill folder (graal in oracle/skills) into .claude/skills/graal in your project. Claude Code loads it when a task matches its description.
How do I install Graal in Codex?
Run `npx skills add oracle/skills --skill graal -a codex`. Or copy the skill folder (graal in oracle/skills) into .agents/skills/graal in your project. Codex loads it when a task matches its description.
Can I use Graal 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 oracle/skills --skill graal -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/graal, .gemini/skills/graal, .github/skills/graal and .opencode/skills/graal in your project.
What does Graal need to run?
SKILL.md names no scripts, command-line tools or credentials: Graal is instructions for the agent only.
Does Graal access the network?
SKILL.md names 2 domains. As links in the text: github.com and graalvm.org. This is read from the text; nothing was executed.
Is Graal 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 Graal use?
Graal is published under the UPL-1.0 licence (the repository's licence).
How many tokens does Graal use?
About 720 tokens (SKILL.md is roughly 2.9k 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 Graal?
Skills that share tags, products or a category with Graal: Android API Diff (gkd-kit/gkd, 43k stars), Caffeine Cache Optimization Experiments (ben-manes/caffeine, 18k stars), Groovy 5 Developer Guide (apache/grails-core, 2.9k stars) and Jspecify Skill (sivaprasadreddy/sivalabs-agent-skills, 188 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Graal?
oracle (a GitHub organization, an official publisher) maintains it in oracle/skills, which has 873 GitHub stars. The repository holds 15 skills in this directory. The repository was last updated on October 6, 2026.
Source: oracle/skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.