feature-flags

class AddSettingsToAccounts < ActiveRecord::Migration[7.1]
  disable_ddl_transaction!

  def change
    add_column :accounts, :settings, :jsonb, null: false, default: {}

class FeatureFlag < ApplicationRecord
  validates :key, presence: true, uniqueness: true
  validates :percentage, inclusion: { in: 0..100 }

  after_commit :expire_cache

class CircuitBreaker
  class CircuitOpenError < StandardError; end

  INCREMENT = <<~LUA.freeze
    local n = redis.call('INCR', KEYS[1])
    if n == 1 then redis.call('EXPIRE', KEYS[1], ARGV[1]) end

<?php

namespace App\Feature;

use Symfony\Component\HttpFoundation\RequestStack;
use Symfony\Contracts\Service\ResetInterface;

package com.example.demo.feature;

import org.togglz.core.Feature;
import org.togglz.core.annotation.EnabledByDefault;
import org.togglz.core.annotation.Label;
import org.togglz.core.context.FeatureContext;

<%= turbo_frame_tag dom_id(flag) do %>
  <tr class="flag-row">
    <td class="flag-name"><%= flag.name %></td>
    <td class="flag-env"><%= flag.environment %></td>
    <td class="flag-state">
      <span class="badge badge--<%= flag.enabled? ? 'on' : 'off' %>">

import { z } from "zod";

const flagValueSchema = z.union([
  z.boolean(),
  z.object({
    rollout: z.number().min(0).max(100),

export const FLAG_REGISTRY = {
  newDashboard: {
    default: false as boolean,
    description: 'Renders the redesigned dashboard shell',
  },
  maxUploadMb: {

package flags

import (
  "context"
  "encoding/json"
  "sync/atomic"

import { Body, Controller, Get, Post, UseGuards } from '@nestjs/common';
import { FeatureFlagGuard } from './feature-flag.guard';
import { RequireFeature } from './feature-flag.decorator';

@Controller('experiments')
@UseGuards(FeatureFlagGuard)