Go SDK

go get github.com/featuresignals/sdk-go

package main

import (
    "fmt"
    fs "github.com/featuresignals/sdk-go"
)

func main() {
    client := fs.NewClient("fs_srv_your_api_key", "production",
        fs.WithBaseURL("https://api.featuresignals.com"),
    )
    defer client.Close()
    <-client.Ready()

    ctx := fs.NewContext("user-123").
        WithAttribute("country", "US").
        WithAttribute("plan", "enterprise")

    enabled := client.BoolVariation("new-feature", ctx, false)
    fmt.Println("Feature enabled:", enabled)
}

// Boolean
enabled := client.BoolVariation("flag-key", ctx, false)

// String
theme := client.StringVariation("theme", ctx, "light")

// Number (returns float64)
limit := client.NumberVariation("rate-limit", ctx, 100.0)

// JSON (returns interface{})
config := client.JSONVariation("feature-config", ctx, map[string]interface{}{})