Feature flag best practices

// shipd.config.ts
import { defineFlags } from "shipdit/config";

export default defineFlags({
  "new-checkout": {
    type: "boolean",
    default: false,
    description: "Redesigned checkout. Remove after full rollout.",
    tags: ["checkout", "release"],
  },
  "search-variant": {
    type: "variant",
    variants: ["control", "semantic", "hybrid"] as const,
    default: "control",
    description: "Search ranking experiment",
    tags: ["search", "experiment"],
  },
});

// shipd.config.go
package main

import "github.com/alasti-company/useshipd.com/sdks/go/config"

var Config = config.ShipdConfig{
	"new-checkout": {Type: "boolean", Default: false,
		Description: "Redesigned checkout. Remove after full rollout.",
		Tags:        []string{"checkout", "release"}},
	"search-variant": {Type: "variant", Default: "control",
		Variants:    []string{"control", "semantic", "hybrid"},
		Description: "Search ranking experiment",
		Tags:        []string{"search", "experiment"}},
}

// src/checkout.ts
import { createClient } from "shipdit";
import type { FlagDefinitions } from "./generated/flags";

const shipd = createClient<FlagDefinitions>({
  sdkKey: process.env.SHIPD_SDK_KEY!,
  defaults: { "new-checkout": false, "search-variant": "control" },
});

await shipd.ready();

export function renderCheckoutFor(userId: string) {
  if (shipd.isEnabled("new-checkout", { userId })) {
    return renderNewCheckout();
  }
  return renderLegacyCheckout();
}

// Within your application's request handler; see the Go quickstart for setup.
if client.IsEnabled("new-checkout", shipd.EvaluationContext{UserID: "usr_8f2k19"}) {
    // New checkout.
} else {
    // Legacy checkout.
}