Geo Compare
sickn33/agentic-awesome-skills
Monthly delta tracking and progress reporting for GEO clients.
Run a given Ballerina source file with jBallerina to compare behaviour against this interpreter
Apache-2.0Auto-check passed
Install Run Jballerina
$ npx skills add ballerina-nutcracker/ballerina --skill run-jballerina -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install ballerina-nutcracker/ballerina run-jballerina --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/ballerina-nutcracker/ballerina.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/run-jballerina .claude/skills/run-jballerina && 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 "run-jballerina" agent skill from https://github.com/ballerina-nutcracker/ballerina/tree/main/.agents/skills/run-jballerina into .claude/skills/run-jballerina/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "run-jballerina", 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/ballerina-nutcracker/ballerina/tree/main/.agents/skills/run-jballerinaType 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 ballerina-nutcracker/ballerina --skill run-jballerina -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install ballerina-nutcracker/ballerina run-jballerina --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ballerina-nutcracker/ballerina.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/run-jballerina .agents/skills/run-jballerina && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "run-jballerina" agent skill from https://github.com/ballerina-nutcracker/ballerina/tree/main/.agents/skills/run-jballerina into .agents/skills/run-jballerina/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "run-jballerina", 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 ballerina-nutcracker/ballerina --skill run-jballerina -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install ballerina-nutcracker/ballerina run-jballerina --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ballerina-nutcracker/ballerina.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/run-jballerina .cursor/skills/run-jballerina && 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 "run-jballerina" agent skill from https://github.com/ballerina-nutcracker/ballerina/tree/main/.agents/skills/run-jballerina into .cursor/skills/run-jballerina/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "run-jballerina", 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/ballerina-nutcracker/ballerina.git --path .agents/skills/run-jballerina--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 ballerina-nutcracker/ballerina --skill run-jballerina -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install ballerina-nutcracker/ballerina run-jballerina --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ballerina-nutcracker/ballerina.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/run-jballerina .gemini/skills/run-jballerina && 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 "run-jballerina" agent skill from https://github.com/ballerina-nutcracker/ballerina/tree/main/.agents/skills/run-jballerina into .gemini/skills/run-jballerina/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "run-jballerina", 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 ballerina-nutcracker/ballerina run-jballerinaInstalls 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 ballerina-nutcracker/ballerina --skill run-jballerina -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/ballerina-nutcracker/ballerina.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/run-jballerina .github/skills/run-jballerina && 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 "run-jballerina" agent skill from https://github.com/ballerina-nutcracker/ballerina/tree/main/.agents/skills/run-jballerina into .github/skills/run-jballerina/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "run-jballerina", 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 ballerina-nutcracker/ballerina --skill run-jballerina -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install ballerina-nutcracker/ballerina run-jballerina --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ballerina-nutcracker/ballerina.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/run-jballerina .opencode/skills/run-jballerina && 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 "run-jballerina" agent skill from https://github.com/ballerina-nutcracker/ballerina/tree/main/.agents/skills/run-jballerina into .opencode/skills/run-jballerina/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "run-jballerina", 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
run-jballerina- GitHub stars
- 121
- Token cost
- ~241 tokens
- SKILL.md length
- 121 words
- Files
- 1
- Skills in repo
- 7
- Repo updated
- First seen
- Licence
- Apache-2.0
At a glance
Run a given Ballerina source file with jBallerina to compare behaviour against this interpreter
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Run Jballerina is an agent skill from ballerina-nutcracker/ballerina. Run a given Ballerina source file with jBallerina to compare behaviour against this interpreter
Its SKILL.md is about 240 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
The repository describes itself as: Native Ballerina Interpreter. The licence is Apache-2.0.
Example prompts
- “/run-jballerina”
What it can do on your machine
Read from SKILL.md and the folder at commit 10721ca. 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 (its code samples are bash).
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
Run Jballerina loads about 241 tokens when it runs. Until then it costs about 28 tokens; SKILL.md has 121 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 ballerina-nutcracker/ballerina at commit 10721ca, republished under its Apache-2.0 licence (© ballerina-nutcracker). 121 words, ~241 tokens.
Download SKILL.mdSave it as
.claude/skills/run-jballerina/SKILL.md (or your agent's skills folder).- name
- run-jballerina
- description
- Run a given Ballerina source file with jBallerina to compare behaviour against this interpreter
Use this skill when you need to validate this interpreter's behaviour against the Java implementation of Ballerina (jBallerina).
Run the given Ballerina source file with jBallerina using:
bash bal run $fileReplace
$filewith the path to the.balsource file under test.Compare stdout, stderr, exit status, compile errors, and runtime panics/errors with this interpreter's behaviour.
- When it comes to errors validate you get the error in the same line numbers and that interpreter error is not an unimplemented or internal error.
- For panics validate the line numbers in stack frame are the same.
- For both don't worry about the error messages being different
If
balis not available inPATH, report that jBallerina is not installed or not configured for the current environment.
© ballerina-nutcracker, 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/skills/run-jballerina of ballerina-nutcracker/ballerina.
Open the folder on GitHubat commit 10721ca
Compare with similar skills
Run Jballerina 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 |
|---|---|---|---|---|---|---|
| Run Jballerina this skillballerina-nutcracker/ballerina | 121 | — | ~241 | Automated safety check: Pass | Apache-2.0 | |
| Geo Comparesickn33/agentic-awesome-skills | 47k | 1 repos | ~2.7k | Automated safety check: Notes | MIT | |
| Compare Python TypecheckersJetBrains/intellij-community | 21k | — | ~617 | Automated safety check: Pass | Custom licence | |
| Recipe Compare Sheet Tabsgoogleworkspace/cli | 31k | — | ~182 | Automated safety check: Pass | Apache-2.0 | |
| Comparetaishi-i/awesome-japanese-nlp-resources | 1k | — | ~4.1k | Automated safety check: Notes | CC0-1.0 | |
| Nemoclaw Maintainer PR ComparatorNVIDIA/NemoClaw | 23k | — | ~1.8k | Automated safety check: Pass | Apache-2.0 |
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More from ballerina-nutcracker/ballerina
Stdlib Readme Format
ballerina-nutcracker/ballerina
Authoritative format contract for lib/stdlibs/ballerina/<name/0.0.1/go1.27/README.md files.
Add Stdlib Support
ballerina-nutcracker/ballerina
Port a new ballerina/<name stdlib package from jBallerina to this Go-native interpreter.
Fill Stdlib Gap
ballerina-nutcracker/ballerina
Fill a gap in an existing ballerina/<name stdlib — implement a function marked Not Yet Supported, promote a Partially Supported row, or fix a behavioural divergence.
Validate Stdlib Contract
ballerina-nutcracker/ballerina
Validate that a ballerina/<name stdlib's Go public contract does not break the jBallerina public interface.
Filling Subset Doc
ballerina-nutcracker/ballerina
A skill your agent uses when you are asked to fill in a subset doc (./doc/lang/subset.md)
Manage Corpus Tests
ballerina-nutcracker/ballerina
Creating/updating corpus tests
Questions about Run Jballerina
What does Run Jballerina do?
Run a given Ballerina source file with jBallerina to compare behaviour against this interpreter. Run Jballerina is an agent skill from ballerina-nutcracker/ballerina.
How do I install Run Jballerina in Claude Code?
Run `npx skills add ballerina-nutcracker/ballerina --skill run-jballerina -a claude-code`. Or copy the skill folder (.agents/skills/run-jballerina in ballerina-nutcracker/ballerina) into .claude/skills/run-jballerina in your project. Claude Code loads it when a task matches its description.
How do I install Run Jballerina in Codex?
Run `npx skills add ballerina-nutcracker/ballerina --skill run-jballerina -a codex`. Or copy the skill folder (.agents/skills/run-jballerina in ballerina-nutcracker/ballerina) into .agents/skills/run-jballerina in your project. Codex loads it when a task matches its description.
Can I use Run Jballerina 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 ballerina-nutcracker/ballerina --skill run-jballerina -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/run-jballerina, .gemini/skills/run-jballerina, .github/skills/run-jballerina and .opencode/skills/run-jballerina in your project.
What does Run Jballerina need to run?
SKILL.md names no scripts, command-line tools or credentials: Run Jballerina is instructions for the agent only.
Does Run Jballerina 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 Run Jballerina 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 Run Jballerina use?
Run Jballerina 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 Run Jballerina use?
About 241 tokens (SKILL.md is roughly 964 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 Run Jballerina?
Skills that share tags, products or a category with Run Jballerina: Geo Compare (sickn33/agentic-awesome-skills, 47k stars), Compare Python Typecheckers (JetBrains/intellij-community, 21k stars), Recipe Compare Sheet Tabs (googleworkspace/cli, 31k stars) and Compare (taishi-i/awesome-japanese-nlp-resources, 1k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Run Jballerina?
ballerina-nutcracker (a GitHub organization) maintains it in ballerina-nutcracker/ballerina, which has 121 GitHub stars. The repository holds 7 skills in this directory. The repository was last updated on October 9, 2026.
Source: ballerina-nutcracker/ballerina on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.