Agent skill

Write Script Deno

by windmill-labs in windmill-labs/windmill

Use ONLY when a TypeScript script specifically requires the Deno runtime (Deno stdlib or deno.land URL imports).

Custom licenceAuto-check passed

Install Write Script Deno

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

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

GitHub CLI
$ gh skill install windmill-labs/windmill write-script-deno --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-deno .claude/skills/write-script-deno && 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-deno
GitHub stars
18k
Token cost
~9.6k tokens
SKILL.md length
4,722 words
Files
1
Skills in repo
42
Repo updated
First seen
Licence
Custom licence

At a glance

Use ONLY when a TypeScript script specifically requires the Deno runtime (Deno stdlib or deno.land URL imports).

  • SKILL.md covers CLI Commands, General Principles, Return Values and Preprocessor Scripts, plus 6 more sections
  • Calls git; reaches deno.land; needs WM_TOKEN

What it does

Write Script Deno is an agent skill from windmill-labs/windmill. Use ONLY when a TypeScript script specifically requires the Deno runtime (Deno stdlib or deno.land URL imports). For all other TypeScript, use write-script-bun instead.

Its SKILL.md is about 9.6k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It works with Deno and TypeScript. The repository describes itself as: Open-source developer platform to power your entire infra and turn scripts into webhooks, workflows and UIs. Fastest workflow engine (13x vs Airflow). Open-source alternative to…

Example prompts

  • “/write-script-deno”

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

    Hosts in commands or code, which the agent is likely to contact:

    • deno.land

    Also links to:

    • windmill.dev

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names these keys or tokens, usually read from environment variables:

    • WM_TOKEN

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Write Script Deno loads about 9.6k tokens when it runs. Until then it costs about 47 tokens; SKILL.md has 4,722 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~47
When it runs · the whole SKILL.md, loaded when a task matches
~9.6k

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 4,722 words (~9,605 tokens).

name
write-script-deno

Read the full SKILL.md on GitHub

Files

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

Open the folder on GitHubat commit eab3dd5

Compare with similar skills

Write Script Deno 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 Deno compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Write Script Deno this skillwindmill-labs/windmill18k—~9.6kAutomated safety check: PassCustom licence
Yahoo Finance2gadicc/yahoo-finance2801—~1.8kAutomated safety check: PassMIT
Dddswamp-club/swamp642—~1.4kAutomated safety check: PassCustom licence
TS SDK Authormindfold-ai/Trellis15k—~6.1kAutomated safety check: PassMIT
Deno Scriptcataclysmbn/Cataclysm-BN1.3k—~1.8kAutomated safety check: PassCustom licence
npm Supply Chain Securitybodadotsh/npm-security-best-practices859—~1kAutomated safety check: WarnMIT

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  • Local PR Review

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  • Draft PR with CI Rounds

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    Opens a draft GitHub pull request with a conventional title and explicit body, then drives CI review rounds before marking it ready.

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  • Windmill Dev Page Preview

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Works with

Questions about Write Script Deno

What does Write Script Deno do?

Use ONLY when a TypeScript script specifically requires the Deno runtime (Deno stdlib or deno.land URL imports). Write Script Deno is an agent skill from windmill-labs/windmill.land URL imports).

How do I install Write Script Deno in Claude Code?

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

How do I install Write Script Deno in Codex?

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

Can I use Write Script Deno 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-deno -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-deno, .gemini/skills/write-script-deno, .github/skills/write-script-deno and .opencode/skills/write-script-deno in your project.

What does Write Script Deno need to run?

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

Does Write Script Deno access the network?

SKILL.md names 2 domains. In commands or code: deno.land; the agent is likely to contact it when it follows the instructions. As links in the text: windmill.dev. This is read from the text; nothing was executed.

Is Write Script Deno 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 Deno use?

Write Script Deno 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 Deno use?

About 9.6k tokens (SKILL.md is roughly 38k 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 Deno?

Skills that share tags, products or a category with Write Script Deno: Yahoo Finance2 (gadicc/yahoo-finance2, 801 stars), Ddd (swamp-club/swamp, 642 stars), TS SDK Author (mindfold-ai/Trellis, 15k stars) and Deno Script (cataclysmbn/Cataclysm-BN, 1.3k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Write Script Deno?

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.