New: 97,000+ skills indexed from GitHub repos with 100+ stars · every skill safety-checkedBrowse top skillsTop skills
Esc to closeBrowse all skills
Submit a skillBrowse skills
Submit a skillBrowse skills

Agent skill

Deno

by OpenHands in OpenHands/extensions

If the project uses deno, use this skill. An agent skill from OpenHands/extensions.

MITAuto-check passedDevelopment

Install Deno

skills CLI
$ npx skills add OpenHands/extensions --skill deno -a claude-code

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

GitHub CLI
$ gh skill install OpenHands/extensions 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/OpenHands/extensions.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/deno .claude/skills/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
deno
GitHub stars
157
Token cost
~567 tokens
SKILL.md length
123 words
Files
6 (incl. references)
Skills in repo
78
Repo updated
First seen
Licence
MIT

At a glance

If the project uses deno, use this skill. An agent skill from OpenHands/extensions.

  • Initialize and work with Deno projects
  • SKILL.md covers Quick decision rules, Common operations and Notes / pitfalls
  • Calls deno
  • Add/remove dependencies (JSR and npm)

What it does

Deno is an agent skill from OpenHands/extensions. If the project uses deno, use this skill. Use this skill to initialize and work with Deno projects, add/remove dependencies (JSR and npm), run tasks and scripts with appropriate permissions, and use built-in tooling (fmt/lint/test).

Its SKILL.md is about 570 tokens, which your agent loads only when the skill is triggered. The skill folder holds 7 other files, including reference files (for example `.plugin/plugin.json`, `README.md` and `references/README.md`).

It sits in Development, covering Linting and formatting. It works with Deno and npm. The repository describes itself as: Public registry for OpenHands extensions. The licence is MIT.

When your agent uses it

  • Initialize and work with Deno projects
  • Add/remove dependencies (JSR and npm)
  • Run tasks and scripts with appropriate permissions
  • Use built-in tooling (fmt/lint/test)

Example prompts

  • “/deno”

What it can do on your machine

Read from SKILL.md and the folder at commit d008b81. 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:

    • deno

    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

Deno loads about 567 tokens when it runs, and up to ~623 if it reads all its reference files. Until then it costs about 59 tokens; SKILL.md has 123 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~59
When it runs · the whole SKILL.md, loaded when a task matches
~567
With references · SKILL.md plus every file in references/, read only if the agent opens them
~623

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 OpenHands/extensions at commit d008b81, republished under its MIT licence (© OpenHands). 123 words, ~567 tokens.

Download SKILL.mdSave it as .claude/skills/deno/SKILL.md (or your agent's skills folder). This skill also uses 5 other files; get the full folder from GitHub.
name
deno
description
If the project uses deno, use this skill. Use this skill to initialize and work with Deno projects, add/remove dependencies (JSR and npm), run tasks and scripts with appropriate permissions, and use built-in tooling (fmt/lint/test).
triggers
deno, deno.json, deno.jsonc, deno.lock

Deno

Use Deno as the default runtime/tooling when the repo contains deno.json/deno.jsonc, uses deno.lock, or scripts/documentation reference deno task, deno run, deno test, etc.

Quick decision rules

  • Prefer deno task <name> if the repo defines tasks.
  • Use deno add / deno remove to manage dependencies (writes to config).
  • Be explicit about permissions for deno run / deno test.

Common operations

Initialize a new project
bash
deno init
Add dependencies (JSR and npm)
bash
# JSR (recommended for Deno-first packages)
deno add jsr:@std/path

# npm packages are supported too
deno add npm:react

# multiple at once
deno add jsr:@std/assert npm:chalk
Remove dependencies
bash
deno remove jsr:@std/path
Run a script
bash
# Minimal permissions: only what the program needs
# Examples:
#   --allow-net=api.example.com
#   --allow-read=./data
#   --allow-env=FOO,BAR

deno run --allow-net --allow-read main.ts
Run tasks
bash
# list tasks
deno task

# run a task defined in deno.json/deno.jsonc
deno task dev
Formatting, linting, testing
bash
deno fmt
deno lint
deno test

# common permissioned test run
deno test --allow-net --allow-read
Install / run CLIs
bash
# Run a JSR or npm package's CLI without installing globally
deno x jsr:@std/http/file-server -p 8080

# Install globally (requires choosing permissions at install time)
# Prefer the smallest set of permissions; avoid blanket flags unless necessary.
deno install -g -N -R jsr:@std/http/file-server -- -p 8080

Notes / pitfalls

  • Deno is secure-by-default: missing permissions cause runtime errors; add the smallest set of --allow-* flags needed.
  • Dependency specifiers:
    • jsr: for JSR registry packages
    • npm: for npm packages
    • URL imports are also supported (and cached)
  • Lockfile: deno.lock helps ensure reproducible dependency resolution.

© OpenHands, MIT. 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 5 other files (references) in skills/deno of OpenHands/extensions.

  • SKILL.md
  • .claude-plugin
  • .codex-plugin
  • .plugin/plugin.json
  • README.md
  • references/README.md

Open the folder on GitHubat commit d008b81

Compare with similar skills

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.

Deno compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Deno this skillOpenHands/extensions157—~567Automated safety check: PassMIT
Deno Runtime and Package Managerdenoland/skills100—~2.7kAutomated safety check: PassMIT
Pre Commitwellwelwel/poku1.2k—~728Automated safety check: PassMIT
Install Anti-Slop Oxlint Rulesdmmulroy/anti-slop5.2k—~2.2kAutomated safety check: PassMIT
Setup Pre Commitfossasia/eventyay-interpretation1.6k12 repos~565Automated safety check: PassApache-2.0
Releasehyhmrright/brooks-lint1.5k—~1.2kAutomated safety check: PassMIT

Similar skills

  • Deno Runtime and Package Manager

    denoland/skills

    Official

    Guides writing, running and configuring Deno 2.9+ projects: installing npm and JSR dependencies, permissions, config file precedence and the built-in fmt, lint, test and compile toolchain.

    100 GitHub stars~2.7k tokensUpdated 2 mo ago
    DevelopmentAuto-check passed

  • Pre Commit

    wellwelwel/poku

    Run the mandatory pre-commit checks for the poku repository before staging a commit.

    1.2k GitHub stars~728 tokensUpdated 3 mo ago
    Testing & QAAuto-check passed

  • Install Anti-Slop Oxlint Rules

    dmmulroy/anti-slop

    Installs, updates or migrates the vendored anti-slop Oxlint plugin in a repository, keeping local rule changes and the plugin's license and provenance files.

    5.2k GitHub stars~2.2k tokensUpdated 27 days ago
    DevelopmentAuto-check passed

  • Setup Pre Commit

    fossasia/eventyay-interpretation

    Set up Husky pre-commit hooks with lint-staged (Prettier), type checking, and tests in the current repo.

    1.6k GitHub starsUsed in 12 repos~565 tokens
    DevelopmentAuto-check passed

  • Release

    hyhmrright/brooks-lint

    Cut a brooks-lint release: set the version in package.json, propagate it across all four plugin manifests and every version-bearing text file (README badges, docs site metadata), write the CHANGELOG…

    1.5k GitHub stars~1.2k tokensUpdated 2 days ago
    DevelopmentAuto-check passed

  • TS SDK Author

    mindfold-ai/Trellis

    Design, build, verify, and publish production-grade TypeScript SDKs as npm packages inside a pnpm monorepo.

    15k GitHub stars~6.1k tokensUpdated 8 days ago
    DevelopmentAuto-check passed

More from OpenHands/extensions

All 78 skills in this repo

  • Agent Readiness Report

    OpenHands/extensions

    Evaluate how well a codebase supports autonomous AI-assisted development.

    157 GitHub stars~1.1k tokensUpdated today
    Auto-check passed

  • Discord

    OpenHands/extensions

    Build and automate Discord integrations (bots, webhooks, slash commands, and REST API workflows).

    157 GitHub stars~1.1k tokensUpdated today
    Auto-check passed

  • GitHub

    OpenHands/extensions

    Interact with GitHub repositories, pull requests, issues, and workflows using the GITHUBTOKEN environment variable and GitHub CLI.

    157 GitHub stars~1.7k tokensUpdated today
    Auto-check passed

  • GitHub Issue To PR

    OpenHands/extensions

    Create an automation that implements GitHub issues when a configurable trigger label is applied.

    157 GitHub stars~4.4k tokensUpdated today
    Auto-check passed

  • GitHub Repo Monitor

    OpenHands/extensions

    This skill should be used when the user asks to "monitor a GitHub repository", "watch GitHub for issues or PRs", "respond to @OpenHands mentions on GitHub", "set up an OpenHands GitHub integration"…

    157 GitHub stars~3.1k tokensUpdated today
    Auto-check passed

  • GitLab Issue To Mr

    OpenHands/extensions

    Create an automation that implements GitLab issues when a configurable trigger label is applied.

    157 GitHub stars~4.9k tokensUpdated today
    Auto-check passed

Works with

Categories

Questions about Deno

What does Deno do?

If the project uses deno, use this skill. An agent skill from OpenHands/extensions. Deno is an agent skill from OpenHands/extensions. If the project uses deno, use this skill.

When should I use Deno?

Deno fits situations like: initialize and work with Deno projects; add/remove dependencies (JSR and npm); run tasks and scripts with appropriate permissions; use built-in tooling (fmt/lint/test).

How do I install Deno in Claude Code?

Run `npx skills add OpenHands/extensions --skill deno -a claude-code`. Or copy the skill folder (skills/deno in OpenHands/extensions) into .claude/skills/deno in your project. Claude Code loads it when a task matches its description.

How do I install Deno in Codex?

Run `npx skills add OpenHands/extensions --skill deno -a codex`. Or copy the skill folder (skills/deno in OpenHands/extensions) into .agents/skills/deno in your project. Codex loads it when a task matches its description.

Can I use 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 OpenHands/extensions --skill 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/deno, .gemini/skills/deno, .github/skills/deno and .opencode/skills/deno in your project.

What does Deno need to run?

Going by SKILL.md and its folder, Deno needs the command-line tools its instructions call (deno).

Does Deno 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 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 Deno use?

Deno is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Deno use?

About 567 tokens (SKILL.md is roughly 2.3k 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 56 tokens, read only when the agent opens those files.

What are the alternatives to Deno?

Skills that share tags, products or a category with Deno: Deno Runtime and Package Manager (denoland/skills, 100 stars), Pre Commit (wellwelwel/poku, 1.2k stars), Install Anti-Slop Oxlint Rules (dmmulroy/anti-slop, 5.2k stars) and Setup Pre Commit (fossasia/eventyay-interpretation, 1.6k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Deno?

OpenHands (a GitHub organization) maintains it in OpenHands/extensions, which has 157 GitHub stars. The repository holds 78 skills in this directory. The repository was last updated on October 6, 2026.

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