Agent skill

Write Script Java

by windmill-labs in windmill-labs/windmill

“MUST use when writing Java scripts.”

— description from SKILL.md by windmill-labs
Custom licenceAuto-check passed

Install Write Script Java

skills CLI
$ npx skills add windmill-labs/windmill --skill write-script-java -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install windmill-labs/windmill write-script-java --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/windmill-labs/windmill.git skills-src && mkdir -p .claude/skills && cp -r skills-src/system_prompts/auto-generated/skills/write-script-java .claude/skills/write-script-java && rm -rf skills-src

Use ~/.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/

Facts

Skill name
write-script-java
GitHub stars
18k
Token cost
~2.1k tokens
SKILL.md length
1,175 words
Files
1
Skills in repo
42
Repo updated
First seen
Licence
Custom licence

At a glance

  • SKILL.md covers CLI Commands, General Principles, Return Values and Preprocessor Scripts, plus 1 more section
  • Calls git

About this skill

Write Script Java is a skill in windmill-labs/windmill (18k stars). Its SKILL.md is about 2.1k tokens. Licence: Custom licence.

What it can do on your machine

Read from SKILL.md and the folder at commit eab3dd5. 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:

    • git

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md. Its commands use git, which can reach the network depending on how they are called.

    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

Write Script Java loads about 2.1k tokens when it runs. Until then it costs about 13 tokens; SKILL.md has 1,175 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~13
When it runs · the whole SKILL.md, loaded when a task matches
~2.1k

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 (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 1,175 words (~2,106 tokens).

name
write-script-java

Read the full SKILL.md on GitHub

Files

Just SKILL.md in system_prompts/auto-generated/skills/write-script-java of windmill-labs/windmill.

Open the folder on GitHubat commit eab3dd5

Compare with similar skills

Write Script Java 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.

Write Script Java compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Write Script Java this skillwindmill-labs/windmill18k—~2.1kAutomated safety check: PassCustom licence
Brainstormingxpinjection/test-driven-spring-boot11254 repos~2.6kAutomated safety check: PassMIT
Android API Diffgkd-kit/gkd43k—~796Automated safety check: PassGPL-3.0
Video Cover Imageitwanger/toBeBetterJavaer18k—~3.3kAutomated safety check: PassNone
Lancedb Update Lance Dependencylancedb/lancedb12k—~1.1kAutomated safety check: PassApache-2.0
Java SDK E2E Test with Replay Snapshotgithub/copilot-sdk11k—~1.8kAutomated safety check: PassMIT

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Works with

Questions about Write Script Java

How do I install Write Script Java in Claude Code?

Run `npx skills add windmill-labs/windmill --skill write-script-java -a claude-code`. Or copy the skill folder (system_prompts/auto-generated/skills/write-script-java in windmill-labs/windmill) into .claude/skills/write-script-java in your project. Claude Code loads it when a task matches its description.

How do I install Write Script Java in Codex?

Run `npx skills add windmill-labs/windmill --skill write-script-java -a codex`. Or copy the skill folder (system_prompts/auto-generated/skills/write-script-java in windmill-labs/windmill) into .agents/skills/write-script-java in your project. Codex loads it when a task matches its description.

Can I use Write Script Java 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 windmill-labs/windmill --skill write-script-java -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/write-script-java, .gemini/skills/write-script-java, .github/skills/write-script-java and .opencode/skills/write-script-java in your project.

What does Write Script Java need to run?

Going by SKILL.md and its folder, Write Script Java needs the command-line tools its instructions call (git).

Does Write Script Java access the network?

SKILL.md contains no URLs. Its commands use git, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Write Script Java 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 Write Script Java use?

Write Script Java has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does Write Script Java use?

About 2.1k tokens (SKILL.md is roughly 8.4k 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 Write Script Java?

Skills that share tags, products or a category with Write Script Java: Brainstorming (xpinjection/test-driven-spring-boot, 112 stars), Android API Diff (gkd-kit/gkd, 43k stars), Video Cover Image (itwanger/toBeBetterJavaer, 18k stars) and Lancedb Update Lance Dependency (lancedb/lancedb, 12k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Write Script Java?

windmill-labs (a GitHub organization) maintains it in windmill-labs/windmill, which has 18,117 GitHub stars. The repository holds 42 skills in this directory. The repository was last updated on October 7, 2026.

Source: windmill-labs/windmill on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.