Hanzo Insights Go SDK

Go client SDK for Hanzo Insights (product analytics). Built on PostHog Go client.

Install

go get github.com/hanzoai/insights-go

Quick Start

package main

import (
    "os"

    posthog "github.com/hanzoai/insights-go"
)

func main() {
    client, _ := posthog.NewWithConfig(
        os.Getenv("INSIGHTS_API_KEY"),
        posthog.Config{
            Endpoint: "https://insights.hanzo.ai",
        },
    )
    defer client.Close()

    // Capture an event
    client.Enqueue(posthog.Capture{
        DistinctId: "user-123",
        Event:      "purchase",
        Properties: posthog.NewProperties().
            Set("plan", "enterprise").
            Set("amount", 99),
    })
}

Common Operations

Capture Events

client.Enqueue(posthog.Capture{
    DistinctId: "user-123",
    Event:      "page_view",
    Properties: posthog.NewProperties().
        Set("$current_url", "https://example.com/pricing"),
})

Identify Users

client.Enqueue(posthog.Identify{
    DistinctId: "user-123",
    Properties: posthog.NewProperties().
        Set("email", "[email protected]").
        Set("name", "Alice").
        Set("plan", "pro"),
})

Feature Flags

// Check if a flag is enabled
enabled, err := client.IsFeatureEnabled(
    posthog.FeatureFlagPayload{
        Key:        "new-dashboard",
        DistinctId: "user-123",
    },
)

if enabled == true {
    // Show new dashboard
}

// Get flag variant
variant, err := client.GetFeatureFlag(
    posthog.FeatureFlagPayload{
        Key:        "checkout-flow",
        DistinctId: "user-123",
    },
)

Group Analytics

// Associate a user with a group
client.Enqueue(posthog.GroupIdentify{
    Type: "company",
    Key:  "hanzo-ai",
    Properties: posthog.NewProperties().
        Set("name", "Hanzo AI").
        Set("industry", "technology"),
})

// Capture event with group context
client.Enqueue(posthog.Capture{
    DistinctId: "user-123",
    Event:      "deploy",
    Groups: posthog.NewGroups().
        Set("company", "hanzo-ai"),
})

Alias Users

client.Enqueue(posthog.Alias{
    DistinctId: "user-123",
    Alias:      "user-456",
})

Configuration

client, _ := posthog.NewWithConfig(
    os.Getenv("INSIGHTS_API_KEY"),
    posthog.Config{
        Endpoint:       "https://insights.hanzo.ai",
        PersonalApiKey: os.Getenv("INSIGHTS_PERSONAL_KEY"), // For local feature flag evaluation
        BatchSize:      100,
        Interval:       5 * time.Second,
        MaxRetries:     posthog.Ptr(3),
        RetryAfter: func(attempt int) time.Duration {
            return time.Duration(100<<attempt) * time.Millisecond
        },
    },
)

Event Delivery

The SDK includes automatic retry logic with configurable backoff. Events are retried on transient network failures (EOF, connection reset, temporary unavailability). Events are dropped after max retries are exhausted (default: 10 attempts), on non-retryable errors (4xx responses), or if the client is closed during retry.

Monitor delivery with a callback:

type DeliveryLogger struct{}

func (d *DeliveryLogger) Success(msg posthog.APIMessage) {
    log.Printf("delivered: %v", msg)
}

func (d *DeliveryLogger) Failure(msg posthog.APIMessage, err error) {
    log.Printf("dropped: %v err=%v", msg, err)
}

client, _ := posthog.NewWithConfig(apiKey, posthog.Config{
    Callback: &DeliveryLogger{},
})

Development

make dependencies   # Install deps
make build          # Run tests and build
make test           # Run tests only

Attribution

Based on PostHog Go. See upstream LICENSE for attribution.

License

MIT License. Copyright (c) Hanzo AI Inc.