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flag-experiment

Skill

Add an experiment-ref rule to a GrowthBook feature flag to run an A/B test through that flag. Use when the user says "run an experiment through this flag", "add an A/B test to flag X", "link experiment Y to this flag", "set up variations on this flag for an experiment", "add an experiment-ref rule",

0Writing

Install

git clone https://github.com/growthbook/skills.git ~/.claude/skills/flag-experiment

What is flag-experiment?

Add an experiment-ref rule to a GrowthBook feature flag to run an A/B test through that flag. Use when the user says "run an experiment through this flag", "add an A/B test to flag X", "link experiment Y to this flag", "set up variations on this flag for an experiment", "add an experiment-ref rule", or "wire up this experiment to the flag". For launching a full new experiment end-to-end, use experiment-launch. For editing the targeting conditions or scope of an existing experiment rule, use flag-targeting. For stopping an experiment and cleaning up its rule, use experiment-stop then flag-rules.

What this can do

Capabilities declared in this component's own frontmatter — not inferred.

Run shell commands

Declares Bash

~150 tokens of context used while enabled, before you invoke anything

All declared tools (1)
Bash

Documentation

README · ~4 min read

flag-experiment

Add an experiment-ref rule to a GrowthBook feature flag. This links a flag rule to a separately-managed GrowthBook experiment object — the experiment is the source of truth for variations, metrics, and analysis.

All API calls go through the bundled helper: ${CLAUDE_PLUGIN_ROOT}/scripts/gb-call. It needs GB_API_KEY set in env or written to ~/.config/growthbook/.env by /growthbook:gb-setup.

Workflow

Path A — Add an experiment-ref rule

Use this when the user has an existing GrowthBook experiment or wants to launch one through a flag.

1. Fetch the flag and confirm the experiment exists:

gb-call GET /api/v2/features/<flag-id>

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