deno

Original：🇺🇸 English

Translated

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).

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Sourceopenhands/skills

Added on2026-03-09

NPX Install

npx skill4agent add openhands/skills deno

SKILL.md Content

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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.

deno

NPX Install

Tags

SKILL.md Content

Deno

Quick decision rules

Common operations

Initialize a new project

Add dependencies (JSR and npm)

Remove dependencies

Run a script

Run tasks

Formatting, linting, testing

Install / run CLIs

Notes / pitfalls