launchdarkly-flag-create

A guide for creating LaunchDarkly feature flags, which are switches that control whether code is active for different users or environments. It first looks at patterns in the existing codebase so the new flag fits them.

In plain words
What is it for?
Use it to create a flag, wrap code in a flag, add a feature toggle, or set up an experiment.
Why use it?
It avoids creating flags that conflict with the project's existing structure or usage conventions. It also helps turn a requested feature toggle or experiment into a suitable code change.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/launchdarkly/ai-tooling/launchdarkly-flag-create
Any agent
npx skills add launchdarkly/ai-tooling --skill launchdarkly-flag-create
Clone the repo
git clone --depth 1 https://github.com/launchdarkly/ai-tooling

Made for: Claude Code, Codex.

Per session 61 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,819 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00061 $0.01819
Opus 5 $0.00030 $0.00910
Sonnet 5 $0.00012 $0.00364
Haiku 4.5 $0.00006 $0.00182

Measured 2d ago against content hash 37b02268096c, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

launchdarkly-flag-create scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/feature-flags/launchdarkly-flag-create/SKILL.md · 132 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 132 lines · 61 tokens per session scan A 37b02268096c

Subscribe to this mod's changes

launchdarkly-flag-create is a skill published in the GitHub repository launchdarkly/ai-tooling (25 stars, last pushed 2d ago), with no licence file. It adds 61 tokens to every session and 1,819 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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