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Feature Flags

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Flag Types

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Boolean Flags

if BrainzLab::Cortex.enabled?(:new_feature)
  # New feature code
end

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Multivariate Flags

variant = BrainzLab::Cortex.variant(:button_color)
# Returns: "blue", "green", or "red"

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JSON Flags

config = BrainzLab::Cortex.json(:pricing_config)
# Returns: { "basic": 9.99, "pro": 29.99 }

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Creating Flags

1. Go to Cortex > Flags
2. Click “Create Flag”
3. Set name, type, and default value
4. Add targeting rules (optional)
5. Save

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Evaluating Flags

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Basic Usage

BrainzLab::Cortex.enabled?(:feature_name)

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With User Context

BrainzLab::Cortex.enabled?(:feature_name,
  user: {
    id: current_user.id,
    email: current_user.email,
    plan: current_user.plan
  }
)

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With Default

BrainzLab::Cortex.enabled?(:feature_name, default: false)

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Flag Lifecycle

1. Development - Flag created, default off
2. Testing - Enabled for internal users
3. Rollout - Gradually enabled for users
4. GA - Enabled for everyone
5. Cleanup - Flag removed from code and dashboard

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Best Practices

• Use descriptive flag names
• Document what each flag controls
• Clean up old flags regularly
• Monitor flags with Recall/Reflex

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Coming Soon