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Agent skill

Launchdarkly

by BuilderIO in BuilderIO/agent-native

Server-side and client-side LaunchDarkly flag evaluation (project key agent-native).

No licenceAuto-check passedBackend & APIs

Install Launchdarkly

skills CLI
$ npx skills add BuilderIO/agent-native --skill launchdarkly -a claude-code

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

GitHub CLI
$ gh skill install BuilderIO/agent-native launchdarkly --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/BuilderIO/agent-native.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/launchdarkly .claude/skills/launchdarkly && 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
launchdarkly
GitHub stars
7.1k
Token cost
~1.3k tokens
SKILL.md length
517 words
Files
1
Skills in repo
102
Repo updated
First seen
Licence
None found

At a glance

Server-side and client-side LaunchDarkly flag evaluation (project key agent-native).

  • Reading a LaunchDarkly flag from an action
  • SKILL.md covers Rule, LaunchDarkly vs. the built-in…, Setup and Server usage, plus 4 more sections
  • Needs LAUNCHDARKLY_SDK_KEY
  • Wiring LAUNCHDARKLYSDKKEY

What it does

Launchdarkly is an agent skill from BuilderIO/agent-native. Server-side and client-side LaunchDarkly flag evaluation (project key agent-native). Use when reading a LaunchDarkly flag from an action, plugin, or component, or when wiring LAUNCHDARKLYSDKKEY. Distinct from the framework's own feature-flags system.

Its SKILL.md is about 1.3k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Backend & APIs, covering Backend development. The repository describes itself as: A framework for building agentic apps.

When your agent uses it

  • Reading a LaunchDarkly flag from an action
  • Wiring LAUNCHDARKLYSDKKEY

Example prompts

  • “/launchdarkly”

Requirements

  • A credential in LAUNCHDARKLY_SDK_KEY

What it can do on your machine

Read from SKILL.md and the folder at commit e16da0c. 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

    No scripts in the folder and no shell commands in SKILL.md (its code samples are typescript).

    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 these keys or tokens, usually read from environment variables:

    • LAUNCHDARKLY_SDK_KEY

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

Context cost

Launchdarkly loads about 1.3k tokens when it runs. Until then it costs about 68 tokens; SKILL.md has 517 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~68
When it runs · the whole SKILL.md, loaded when a task matches
~1.3k

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

Without a licence we can't republish the file, so here is its outline and opening line. It has 517 words (~1,277 tokens).

“LaunchDarkly flags are read through @agent-native/core/launchdarkly on the server and @agent-native/core/client/launchdarkly in the browser. Every read fails closed to a caller-supplied default — LaunchDarkly being unconfigured, unreachable, or slow is never an availability dependency for the caller.”

— opening of SKILL.md by BuilderIO
name
launchdarkly
scope
dev
metadata.internal
true

Read the full SKILL.md on GitHub

Files

Just SKILL.md in .agents/skills/launchdarkly of BuilderIO/agent-native.

Open the folder on GitHubat commit e16da0c

Compare with similar skills

Launchdarkly 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.

Launchdarkly compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Launchdarkly this skillBuilderIO/agent-native7.1k—~1.3kAutomated safety check: PassNone
Configuring Horizoncoollabsio/coolify63k4 repos~898Automated safety check: PassMIT
Fortify Developmentcoollabsio/coolify63k4 repos~1.9kAutomated safety check: PassMIT
Node Backend Development Guidelinesdiet103/claude-code-infrastructure-showcase10k2 repos~2kAutomated safety check: PassMIT
Laravel Best Practicesanonaddy/anonaddy4.9k13 repos~1.2kAutomated safety check: PassMIT
Laravel Actionscoollabsio/coolify63k—~2.4kAutomated safety check: PassApache-2.0

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Categories

Questions about Launchdarkly

What does Launchdarkly do?

Server-side and client-side LaunchDarkly flag evaluation (project key agent-native). Launchdarkly is an agent skill from BuilderIO/agent-native. Server-side and client-side LaunchDarkly flag evaluation (project key agent-native).

When should I use Launchdarkly?

Launchdarkly fits situations like: reading a LaunchDarkly flag from an action; wiring LAUNCHDARKLYSDKKEY.

How do I install Launchdarkly in Claude Code?

Run `npx skills add BuilderIO/agent-native --skill launchdarkly -a claude-code`. Or copy the skill folder (.agents/skills/launchdarkly in BuilderIO/agent-native) into .claude/skills/launchdarkly in your project. Claude Code loads it when a task matches its description.

How do I install Launchdarkly in Codex?

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

Can I use Launchdarkly 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 BuilderIO/agent-native --skill launchdarkly -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/launchdarkly, .gemini/skills/launchdarkly, .github/skills/launchdarkly and .opencode/skills/launchdarkly in your project.

What does Launchdarkly need to run?

Going by SKILL.md and its folder, Launchdarkly needs credentials named LAUNCHDARKLY_SDK_KEY. Our summary lists: A credential in LAUNCHDARKLY_SDK_KEY.

Does Launchdarkly 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 Launchdarkly 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 Launchdarkly use?

No licence was found for Launchdarkly or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does Launchdarkly use?

About 1.3k tokens (SKILL.md is roughly 5.1k 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 Launchdarkly?

Skills that share tags, products or a category with Launchdarkly: Configuring Horizon (coollabsio/coolify, 63k stars), Fortify Development (coollabsio/coolify, 63k stars), Node Backend Development Guidelines (diet103/claude-code-infrastructure-showcase, 10k stars) and Laravel Best Practices (anonaddy/anonaddy, 4.9k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Launchdarkly?

BuilderIO (a GitHub organization) maintains it in BuilderIO/agent-native, which has 7,087 GitHub stars. The repository holds 102 skills in this directory. The repository was last updated on October 8, 2026.

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