ReddRadar
Agent skill
deno
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).
Install this agent skill to your Project
npx add-skill https://github.com/OpenHands/extensions/tree/main/skills/deno
SKILL.md
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 removeto manage dependencies (writes to config). - Be explicit about permissions for
deno run/deno test.
Common operations
Initialize a new project
deno init
Add dependencies (JSR and npm)
# 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
deno remove jsr:@std/path
Run a script
# 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
# list tasks
deno task
# run a task defined in deno.json/deno.jsonc
deno task dev
Formatting, linting, testing
deno fmt
deno lint
deno test
# common permissioned test run
deno test --allow-net --allow-read
Install / run CLIs
# 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 packagesnpm:for npm packages- URL imports are also supported (and cached)
- Lockfile:
deno.lockhelps ensure reproducible dependency resolution.
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