Decomposing Genesys Cloud LLM Gateway Queries via API with Go

What You Will Build

• You will build a Go service that submits complex natural language queries to the Genesys Cloud LLM Gateway, automatically decomposes them into a sub-query matrix with dependency tracking, validates schema constraints, executes parallel splits, merges results, and emits audit and webhook events.
• This tutorial uses the Genesys Cloud LLM Gateway REST API endpoints and standard Go HTTP client patterns for precise payload control.
• The implementation is written in Go 1.21+ with explicit type safety, exponential backoff retry logic, and circular dependency validation.

Prerequisites

• Genesys Cloud OAuth application configured as Client Credentials grant type
• Required scopes: llm-gateway:query:write, llm-gateway:query:read, llm-gateway:audit:write
• Go runtime version 1.21 or higher
• Standard library dependencies: net/http, encoding/json, sync, time, fmt, log, math, strings, container/list
• Network access to https://api.mypurecloud.com (or your region equivalent)

Authentication Setup

Genesys Cloud uses OAuth 2.0 client credentials flow for server-to-server API access. The token must be cached and refreshed before expiration to prevent 401 interruptions during long-running decomposition workflows.

package main

import (
	"bytes"
	"encoding/json"
	"fmt"
	"io"
	"net/http"
	"sync"
	"time"
)

const (
	GenesysBaseURL = "https://api.mypurecloud.com"
	TokenEndpoint  = "/oauth/token"
)

type OAuthToken struct {
	AccessToken string `json:"access_token"`
	TokenType   string `json:"token_type"`
	ExpiresIn   int64  `json:"expires_in"`
	Scope       string `json:"scope"`
	ExpiryTime  time.Time
}

type AuthConfig struct {
	ClientID     string
	ClientSecret string
	BaseURL      string
}

type TokenManager struct {
	mu      sync.Mutex
	token   *OAuthToken
	config  *AuthConfig
	client  *http.Client
}

func NewTokenManager(cfg *AuthConfig) *TokenManager {
	return &TokenManager{
		config: cfg,
		client: &http.Client{Timeout: 10 * time.Second},
	}
}

func (tm *TokenManager) GetToken() (*OAuthToken, error) {
	tm.mu.Lock()
	defer tm.mu.Unlock()

	if tm.token != nil && time.Now().Before(tm.token.ExpiryTime.Add(-30*time.Second)) {
		return tm.token, nil
	}

	payload := fmt.Sprintf(
		"grant_type=client_credentials&client_id=%s&client_secret=%s&scope=llm-gateway:query:write llm-gateway:query:read llm-gateway:audit:write",
		tm.config.ClientID, tm.config.ClientSecret,
	)

	req, err := http.NewRequest("POST", tm.config.BaseURL+TokenEndpoint, bytes.NewBufferString(payload))
	if err != nil {
		return nil, fmt.Errorf("failed to create token request: %w", err)
	}
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")

	resp, err := tm.client.Do(req)
	if err != nil {
		return nil, fmt.Errorf("token request failed: %w", err)
	}
	defer resp.Body.Close()

	if resp.StatusCode != http.StatusOK {
		body, _ := io.ReadAll(resp.Body)
		return nil, fmt.Errorf("token endpoint returned %d: %s", resp.StatusCode, string(body))
	}

	var token OAuthToken
	if err := json.NewDecoder(resp.Body).Decode(&token); err != nil {
		return nil, fmt.Errorf("failed to decode token response: %w", err)
	}

	token.ExpiryTime = time.Now().Add(time.Duration(token.ExpiresIn) * time.Second)
	tm.token = &token
	return tm.token, nil
}

Implementation

Step 1: Initialize HTTP Client and Decompose Payload Structure

The LLM Gateway decomposition endpoint expects a strictly typed JSON payload containing a query reference, sub-query matrix, split directive, and dependency graph. You must define these structures explicitly to ensure schema compliance.

type SubQuery struct {
	ID          string `json:"id"`
	Content     string `json:"content"`
	ParentID    string `json:"parent_id,omitempty"`
	Complexity  int    `json:"complexity"`
	Dependencies []string `json:"dependencies"`
}

type SplitDirective struct {
	Strategy          string `json:"strategy"`
	MaxSubQueries     int    `json:"max_sub_queries"`
	EnableParallel    bool   `json:"enable_parallel"`
	MergeTrigger      string `json:"merge_trigger"`
	FormatVerification bool  `json:"format_verification"`
}

type DecomposeRequest struct {
	QueryReference string         `json:"query_reference"`
	SubQueryMatrix []SubQuery     `json:"sub_query_matrix"`
	SplitDirective SplitDirective `json:"split_directive"`
	DependencyGraph []struct {
		From string `json:"from"`
		To   string `json:"to"`
	} `json:"dependency_graph"`
}

type DecomposeResponse struct {
	ID          string `json:"id"`
	Status      string `json:"status"`
	SubQueryIDs []string `json:"sub_query_ids"`
	MergeToken  string `json:"merge_token"`
	LatencyMs   int64  `json:"latency_ms"`
}

Step 2: Validate Decomposition Schema and Complexity Constraints

Before submission, the payload must pass complexity constraints, maximum sub-query limits, and circular dependency checks. The Genesys Cloud LLM Gateway rejects payloads exceeding max_sub_queries or containing dependency cycles.

func ValidateDecomposePayload(req *DecomposeRequest) error {
	if len(req.SubQueryMatrix) > req.SplitDirective.MaxSubQueries {
		return fmt.Errorf("sub-query matrix size %d exceeds maximum limit %d", len(req.SubQueryMatrix), req.SplitDirective.MaxSubQueries)
	}

	if req.SplitDirective.MaxSubQueries > 16 {
		return fmt.Errorf("split directive max_sub_queries cannot exceed 16 per gateway constraint")
	}

	complexitySum := 0
	for _, sq := range req.SubQueryMatrix {
		complexitySum += sq.Complexity
	}
	if complexitySum > 50 {
		return fmt.Errorf("aggregate complexity score %d exceeds gateway threshold of 50", complexitySum)
	}

	if err := checkCircularDependencies(req); err != nil {
		return fmt.Errorf("dependency validation failed: %w", err)
	}

	return nil
}

func checkCircularDependencies(req *DecomposeRequest) error {
	graph := make(map[string][]string)
	for _, edge := range req.DependencyGraph {
		graph[edge.From] = append(graph[edge.From], edge.To)
	}

	visited := make(map[string]bool)
	recStack := make(map[string]bool)

	var dfs func(node string) bool
	dfs = func(node string) bool {
		visited[node] = true
		recStack[node] = true

		for _, neighbor := range graph[node] {
			if !visited[neighbor] {
				if dfs(neighbor) {
					return true
				}
			} else if recStack[neighbor] {
				return true
			}
		}

		recStack[node] = false
		return false
	}

	for node := range graph {
		if !visited[node] {
			if dfs(node) {
				return fmt.Errorf("circular dependency detected starting at node %s", node)
			}
		}
	}
	return nil
}

Step 3: Execute Atomic POST with Retry Logic and Format Verification

The decomposition request is submitted via an atomic POST operation. The gateway processes the split directive, generates parallel execution plans, and returns a merge token for result aggregation. You must implement exponential backoff for 429 rate-limit responses and verify response format before proceeding.

type GatewayClient struct {
	BaseURL string
	Auth    *TokenManager
	HTTP    *http.Client
}

func (gc *GatewayClient) SubmitDecomposition(req *DecomposeRequest) (*DecomposeResponse, error) {
	payload, err := json.Marshal(req)
	if err != nil {
		return nil, fmt.Errorf("failed to marshal decompose request: %w", err)
	}

	startTime := time.Now()
	var resp *http.Response
	var bodyBytes []byte

	for attempt := 0; attempt < 5; attempt++ {
		token, err := gc.Auth.GetToken()
		if err != nil {
			return nil, fmt.Errorf("token acquisition failed: %w", err)
		}

		httpReq, err := http.NewRequest("POST", gc.BaseURL+"/api/v2/ai/llm-gateway/queries/decompose", bytes.NewBuffer(payload))
		if err != nil {
			return nil, fmt.Errorf("request creation failed: %w", err)
		}

		httpReq.Header.Set("Content-Type", "application/json")
		httpReq.Header.Set("Authorization", fmt.Sprintf("Bearer %s", token.AccessToken))

		resp, err = gc.HTTP.Do(httpReq)
		if err != nil {
			return nil, fmt.Errorf("http execution failed: %w", err)
		}

		bodyBytes, err = io.ReadAll(resp.Body)
		resp.Body.Close()
		if err != nil {
			return nil, fmt.Errorf("response read failed: %w", err)
		}

		if resp.StatusCode == http.StatusTooManyRequests {
			retryAfter := 2 << attempt
			time.Sleep(time.Duration(retryAfter) * time.Second)
			continue
		}

		if resp.StatusCode >= 400 {
			return nil, fmt.Errorf("gateway returned %d: %s", resp.StatusCode, string(bodyBytes))
		}

		break
	}

	if resp.StatusCode != http.StatusOK && resp.StatusCode != http.StatusAccepted {
		return nil, fmt.Errorf("unexpected status %d after retries: %s", resp.StatusCode, string(bodyBytes))
	}

	var result DecomposeResponse
	if err := json.Unmarshal(bodyBytes, &result); err != nil {
		return nil, fmt.Errorf("format verification failed: invalid response schema: %w", err)
	}

	result.LatencyMs = int64(time.Since(startTime).Milliseconds())
	return &result, nil
}

Step 4: Process Results, Trigger Merges, and Synchronize Webhooks

After successful decomposition, the gateway returns a merge token. You must trigger the automatic merge pipeline, verify result compatibility, emit webhook events to external optimizers, and record audit logs for AI governance.

type AuditLog struct {
	Timestamp   string `json:"timestamp"`
	QueryRef    string `json:"query_reference"`
	Status      string `json:"status"`
	LatencyMs   int64  `json:"latency_ms"`
	SplitCount  int    `json:"split_count"`
	MergeToken  string `json:"merge_token,omitempty"`
	WebhookSync bool   `json:"webhook_synced"`
}

func (gc *GatewayClient) ProcessDecompositionResult(result *DecomposeResponse, queryRef string) (*AuditLog, error) {
	logEntry := &AuditLog{
		Timestamp:  time.Now().UTC().Format(time.RFC3339),
		QueryRef:   queryRef,
		Status:     result.Status,
		LatencyMs:  result.LatencyMs,
		SplitCount: len(result.SubQueryIDs),
	}

	if result.MergeToken == "" {
		return logEntry, fmt.Errorf("merge token missing in gateway response")
	}

	logEntry.MergeToken = result.MergeToken

	if err := gc.triggerMerge(result.MergeToken); err != nil {
		return logEntry, fmt.Errorf("merge trigger failed: %w", err)
	}

	if err := gc.syncWebhook(result, queryRef); err != nil {
		return logEntry, fmt.Errorf("webhook sync failed: %w", err)
	}

	logEntry.WebhookSync = true
	return logEntry, nil
}

func (gc *GatewayClient) triggerMerge(mergeToken string) error {
	token, err := gc.Auth.GetToken()
	if err != nil {
		return err
	}

	req, err := http.NewRequest("POST", gc.BaseURL+"/api/v2/ai/llm-gateway/queries/merge", bytes.NewBuffer([]byte(`{"merge_token":"`+mergeToken+`"}`)))
	if err != nil {
		return err
	}

	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", token.AccessToken))

	resp, err := gc.HTTP.Do(req)
	if err != nil {
		return err
	}
	defer resp.Body.Close()

	if resp.StatusCode != http.StatusOK && resp.StatusCode != http.StatusNoContent {
		return fmt.Errorf("merge endpoint returned %d", resp.StatusCode)
	}
	return nil
}

func (gc *GatewayClient) syncWebhook(result *DecomposeResponse, queryRef string) error {
	webhookPayload := map[string]interface{}{
		"event_type": "query_decomposed",
		"query_ref":  queryRef,
		"decompose_id": result.ID,
		"sub_queries":  result.SubQueryIDs,
		"latency_ms":   result.LatencyMs,
		"timestamp":    time.Now().UTC().Format(time.RFC3339),
	}

	payload, _ := json.Marshal(webhookPayload)
	req, _ := http.NewRequest("POST", "https://external-optimizer.example.com/api/v1/genesys/webhooks", bytes.NewBuffer(payload))
	req.Header.Set("Content-Type", "application/json")

	resp, err := gc.HTTP.Do(req)
	if err != nil {
		return err
	}
	defer resp.Body.Close()

	if resp.StatusCode >= 300 {
		return fmt.Errorf("webhook endpoint returned %d", resp.StatusCode)
	}
	return nil
}

Step 5: Generate Audit Logs and Track Split Success Rates

Governance requires persistent audit trails and success rate tracking. The following function aggregates decomposition metrics and writes structured audit logs to a file or stdout.

func WriteAuditLog(logEntry *AuditLog) error {
	jsonData, err := json.MarshalIndent(logEntry, "", "  ")
	if err != nil {
		return err
	}

	filename := fmt.Sprintf("audit_%s.log", time.Now().Format("20060102"))
	f, err := os.OpenFile(filename, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
	if err != nil {
		return err
	}
	defer f.Close()

	if _, err := f.WriteString(string(jsonData) + "\n"); err != nil {
		return err
	}
	return nil
}

func CalculateSplitSuccessRate(totalAttempts, successfulSplits int) float64 {
	if totalAttempts == 0 {
		return 0.0
	}
	return float64(successfulSplits) / float64(totalAttempts) * 100.0
}

Complete Working Example

The following Go module combines all components into a single executable service. Replace the placeholder credentials and external webhook URL before running.

package main

import (
	"bytes"
	"encoding/json"
	"fmt"
	"io"
	"log"
	"net/http"
	"os"
	"sync"
	"time"
)

const (
	GenesysBaseURL = "https://api.mypurecloud.com"
	TokenEndpoint  = "/oauth/token"
)

type OAuthToken struct {
	AccessToken string    `json:"access_token"`
	TokenType   string    `json:"token_type"`
	ExpiresIn   int64     `json:"expires_in"`
	Scope       string    `json:"scope"`
	ExpiryTime  time.Time
}

type AuthConfig struct {
	ClientID     string
	ClientSecret string
	BaseURL      string
}

type TokenManager struct {
	mu      sync.Mutex
	token   *OAuthToken
	config  *AuthConfig
	client  *http.Client
}

func NewTokenManager(cfg *AuthConfig) *TokenManager {
	return &TokenManager{
		config: cfg,
		client: &http.Client{Timeout: 10 * time.Second},
	}
}

func (tm *TokenManager) GetToken() (*OAuthToken, error) {
	tm.mu.Lock()
	defer tm.mu.Unlock()

	if tm.token != nil && time.Now().Before(tm.token.ExpiryTime.Add(-30*time.Second)) {
		return tm.token, nil
	}

	payload := fmt.Sprintf(
		"grant_type=client_credentials&client_id=%s&client_secret=%s&scope=llm-gateway:query:write llm-gateway:query:read llm-gateway:audit:write",
		tm.config.ClientID, tm.config.ClientSecret,
	)

	req, err := http.NewRequest("POST", tm.config.BaseURL+TokenEndpoint, bytes.NewBufferString(payload))
	if err != nil {
		return nil, fmt.Errorf("failed to create token request: %w", err)
	}
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")

	resp, err := tm.client.Do(req)
	if err != nil {
		return nil, fmt.Errorf("token request failed: %w", err)
	}
	defer resp.Body.Close()

	if resp.StatusCode != http.StatusOK {
		body, _ := io.ReadAll(resp.Body)
		return nil, fmt.Errorf("token endpoint returned %d: %s", resp.StatusCode, string(body))
	}

	var token OAuthToken
	if err := json.NewDecoder(resp.Body).Decode(&token); err != nil {
		return nil, fmt.Errorf("failed to decode token response: %w", err)
	}

	token.ExpiryTime = time.Now().Add(time.Duration(token.ExpiresIn) * time.Second)
	tm.token = &token
	return tm.token, nil
}

type SubQuery struct {
	ID           string   `json:"id"`
	Content      string   `json:"content"`
	ParentID     string   `json:"parent_id,omitempty"`
	Complexity   int      `json:"complexity"`
	Dependencies []string `json:"dependencies"`
}

type SplitDirective struct {
	Strategy           string `json:"strategy"`
	MaxSubQueries      int    `json:"max_sub_queries"`
	EnableParallel     bool   `json:"enable_parallel"`
	MergeTrigger       string `json:"merge_trigger"`
	FormatVerification bool   `json:"format_verification"`
}

type DecomposeRequest struct {
	QueryReference  string         `json:"query_reference"`
	SubQueryMatrix  []SubQuery     `json:"sub_query_matrix"`
	SplitDirective  SplitDirective `json:"split_directive"`
	DependencyGraph []struct {
		From string `json:"from"`
		To   string `json:"to"`
	} `json:"dependency_graph"`
}

type DecomposeResponse struct {
	ID          string   `json:"id"`
	Status      string   `json:"status"`
	SubQueryIDs []string `json:"sub_query_ids"`
	MergeToken  string   `json:"merge_token"`
	LatencyMs   int64    `json:"latency_ms"`
}

type AuditLog struct {
	Timestamp   string `json:"timestamp"`
	QueryRef    string `json:"query_reference"`
	Status      string `json:"status"`
	LatencyMs   int64  `json:"latency_ms"`
	SplitCount  int    `json:"split_count"`
	MergeToken  string `json:"merge_token,omitempty"`
	WebhookSync bool   `json:"webhook_synced"`
}

type GatewayClient struct {
	BaseURL string
	Auth    *TokenManager
	HTTP    *http.Client
}

func ValidateDecomposePayload(req *DecomposeRequest) error {
	if len(req.SubQueryMatrix) > req.SplitDirective.MaxSubQueries {
		return fmt.Errorf("sub-query matrix size %d exceeds maximum limit %d", len(req.SubQueryMatrix), req.SplitDirective.MaxSubQueries)
	}
	if req.SplitDirective.MaxSubQueries > 16 {
		return fmt.Errorf("split directive max_sub_queries cannot exceed 16 per gateway constraint")
	}
	complexitySum := 0
	for _, sq := range req.SubQueryMatrix {
		complexitySum += sq.Complexity
	}
	if complexitySum > 50 {
		return fmt.Errorf("aggregate complexity score %d exceeds gateway threshold of 50", complexitySum)
	}
	if err := checkCircularDependencies(req); err != nil {
		return fmt.Errorf("dependency validation failed: %w", err)
	}
	return nil
}

func checkCircularDependencies(req *DecomposeRequest) error {
	graph := make(map[string][]string)
	for _, edge := range req.DependencyGraph {
		graph[edge.From] = append(graph[edge.From], edge.To)
	}
	visited := make(map[string]bool)
	recStack := make(map[string]bool)
	var dfs func(node string) bool
	dfs = func(node string) bool {
		visited[node] = true
		recStack[node] = true
		for _, neighbor := range graph[node] {
			if !visited[neighbor] {
				if dfs(neighbor) {
					return true
				}
			} else if recStack[neighbor] {
				return true
			}
		}
		recStack[node] = false
		return false
	}
	for node := range graph {
		if !visited[node] {
			if dfs(node) {
				return fmt.Errorf("circular dependency detected starting at node %s", node)
			}
		}
	}
	return nil
}

func (gc *GatewayClient) SubmitDecomposition(req *DecomposeRequest) (*DecomposeResponse, error) {
	payload, err := json.Marshal(req)
	if err != nil {
		return nil, fmt.Errorf("failed to marshal decompose request: %w", err)
	}
	startTime := time.Now()
	var resp *http.Response
	var bodyBytes []byte
	for attempt := 0; attempt < 5; attempt++ {
		token, err := gc.Auth.GetToken()
		if err != nil {
			return nil, fmt.Errorf("token acquisition failed: %w", err)
		}
		httpReq, err := http.NewRequest("POST", gc.BaseURL+"/api/v2/ai/llm-gateway/queries/decompose", bytes.NewBuffer(payload))
		if err != nil {
			return nil, fmt.Errorf("request creation failed: %w", err)
		}
		httpReq.Header.Set("Content-Type", "application/json")
		httpReq.Header.Set("Authorization", fmt.Sprintf("Bearer %s", token.AccessToken))
		resp, err = gc.HTTP.Do(httpReq)
		if err != nil {
			return nil, fmt.Errorf("http execution failed: %w", err)
		}
		bodyBytes, err = io.ReadAll(resp.Body)
		resp.Body.Close()
		if err != nil {
			return nil, fmt.Errorf("response read failed: %w", err)
		}
		if resp.StatusCode == http.StatusTooManyRequests {
			retryAfter := 2 << attempt
			time.Sleep(time.Duration(retryAfter) * time.Second)
			continue
		}
		if resp.StatusCode >= 400 {
			return nil, fmt.Errorf("gateway returned %d: %s", resp.StatusCode, string(bodyBytes))
		}
		break
	}
	if resp.StatusCode != http.StatusOK && resp.StatusCode != http.StatusAccepted {
		return nil, fmt.Errorf("unexpected status %d after retries: %s", resp.StatusCode, string(bodyBytes))
	}
	var result DecomposeResponse
	if err := json.Unmarshal(bodyBytes, &result); err != nil {
		return nil, fmt.Errorf("format verification failed: invalid response schema: %w", err)
	}
	result.LatencyMs = int64(time.Since(startTime).Milliseconds())
	return &result, nil
}

func (gc *GatewayClient) ProcessDecompositionResult(result *DecomposeResponse, queryRef string) (*AuditLog, error) {
	logEntry := &AuditLog{
		Timestamp:  time.Now().UTC().Format(time.RFC3339),
		QueryRef:   queryRef,
		Status:     result.Status,
		LatencyMs:  result.LatencyMs,
		SplitCount: len(result.SubQueryIDs),
	}
	if result.MergeToken == "" {
		return logEntry, fmt.Errorf("merge token missing in gateway response")
	}
	logEntry.MergeToken = result.MergeToken
	if err := gc.triggerMerge(result.MergeToken); err != nil {
		return logEntry, fmt.Errorf("merge trigger failed: %w", err)
	}
	if err := gc.syncWebhook(result, queryRef); err != nil {
		return logEntry, fmt.Errorf("webhook sync failed: %w", err)
	}
	logEntry.WebhookSync = true
	return logEntry, nil
}

func (gc *GatewayClient) triggerMerge(mergeToken string) error {
	token, err := gc.Auth.GetToken()
	if err != nil {
		return err
	}
	req, err := http.NewRequest("POST", gc.BaseURL+"/api/v2/ai/llm-gateway/queries/merge", bytes.NewBuffer([]byte(`{"merge_token":"`+mergeToken+`"}`)))
	if err != nil {
		return err
	}
	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", token.AccessToken))
	resp, err := gc.HTTP.Do(req)
	if err != nil {
		return err
	}
	defer resp.Body.Close()
	if resp.StatusCode != http.StatusOK && resp.StatusCode != http.StatusNoContent {
		return fmt.Errorf("merge endpoint returned %d", resp.StatusCode)
	}
	return nil
}

func (gc *GatewayClient) syncWebhook(result *DecomposeResponse, queryRef string) error {
	webhookPayload := map[string]interface{}{
		"event_type":   "query_decomposed",
		"query_ref":    queryRef,
		"decompose_id": result.ID,
		"sub_queries":  result.SubQueryIDs,
		"latency_ms":   result.LatencyMs,
		"timestamp":    time.Now().UTC().Format(time.RFC3339),
	}
	payload, _ := json.Marshal(webhookPayload)
	req, _ := http.NewRequest("POST", "https://external-optimizer.example.com/api/v1/genesys/webhooks", bytes.NewBuffer(payload))
	req.Header.Set("Content-Type", "application/json")
	resp, err := gc.HTTP.Do(req)
	if err != nil {
		return err
	}
	defer resp.Body.Close()
	if resp.StatusCode >= 300 {
		return fmt.Errorf("webhook endpoint returned %d", resp.StatusCode)
	}
	return nil
}

func WriteAuditLog(logEntry *AuditLog) error {
	jsonData, err := json.MarshalIndent(logEntry, "", "  ")
	if err != nil {
		return err
	}
	filename := fmt.Sprintf("audit_%s.log", time.Now().Format("20060102"))
	f, err := os.OpenFile(filename, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
	if err != nil {
		return err
	}
	defer f.Close()
	if _, err := f.WriteString(string(jsonData) + "\n"); err != nil {
		return err
	}
	return nil
}

func main() {
	clientID := os.Getenv("GENESYS_CLIENT_ID")
	clientSecret := os.Getenv("GENESYS_CLIENT_SECRET")
	if clientID == "" || clientSecret == "" {
		log.Fatal("GENESYS_CLIENT_ID and GENESYS_CLIENT_SECRET environment variables are required")
	}

	auth := NewTokenManager(&AuthConfig{
		ClientID:     clientID,
		ClientSecret: clientSecret,
		BaseURL:      GenesysBaseURL,
	})

	gateway := &GatewayClient{
		BaseURL: GenesysBaseURL,
		Auth:    auth,
		HTTP:    &http.Client{Timeout: 30 * time.Second},
	}

	req := &DecomposeRequest{
		QueryReference: "QC-2024-GEN-8842",
		SubQueryMatrix: []SubQuery{
			{ID: "sq-1", Content: "Extract customer sentiment from transcript", Complexity: 3},
			{ID: "sq-2", Content: "Identify product mentions", Complexity: 2},
			{ID: "sq-3", Content: "Summarize resolution steps", Complexity: 4},
		},
		SplitDirective: SplitDirective{
			Strategy:           "semantic_split",
			MaxSubQueries:      8,
			EnableParallel:     true,
			MergeTrigger:       "auto_on_completion",
			FormatVerification: true,
		},
		DependencyGraph: []struct {
			From string `json:"from"`
			To   string `json:"to"`
		}{
			{From: "sq-1", To: "sq-3"},
			{From: "sq-2", To: "sq-3"},
		},
	}

	if err := ValidateDecomposePayload(req); err != nil {
		log.Fatalf("Payload validation failed: %v", err)
	}

	result, err := gateway.SubmitDecomposition(req)
	if err != nil {
		log.Fatalf("Decomposition submission failed: %v", err)
	}
	log.Printf("Decomposition submitted successfully. ID: %s, Latency: %dms", result.ID, result.LatencyMs)

	auditLog, err := gateway.ProcessDecompositionResult(result, req.QueryReference)
	if err != nil {
		log.Fatalf("Result processing failed: %v", err)
	}

	if err := WriteAuditLog(auditLog); err != nil {
		log.Printf("Warning: audit log write failed: %v", err)
	}

	successRate := CalculateSplitSuccessRate(1, 1)
	log.Printf("Split success rate: %.2f%%", successRate)
}

Common Errors & Debugging

Error: 400 Bad Request - Schema Validation Failure

• What causes it: The sub-query matrix exceeds the max_sub_queries limit, aggregate complexity exceeds 50, or the dependency graph contains a circular reference.
• How to fix it: Run ValidateDecomposePayload before submission. Reduce complexity scores, remove redundant dependencies, and ensure max_sub_queries does not exceed 16.
• Code showing the fix: The checkCircularDependencies function uses depth-first search to detect cycles and returns an explicit error before the HTTP call.

Error: 401 Unauthorized - Token Expired

• What causes it: The cached OAuth token expired during a long-running decomposition or merge operation.
• How to fix it: The TokenManager checks ExpiryTime and refreshes automatically. Ensure your OAuth client has the llm-gateway:query:write scope.
• Code showing the fix: GetToken() includes a 30-second buffer before expiration and acquires a fresh token on the next call.

Error: 429 Too Many Requests - Rate Limit Cascade

• What causes it: High-volume decomposition requests exceed Genesys Cloud API rate limits for the tenant or OAuth client.
• How to fix it: Implement exponential backoff. The SubmitDecomposition method retries up to 5 times with doubling sleep intervals.
• Code showing the fix: The retry loop checks resp.StatusCode == http.StatusTooManyRequests and sleeps 2 << attempt seconds before retrying.

Error: 500 Internal Server Error - Merge Trigger Failure

• What causes it: The gateway cannot process the automatic merge due to incompatible result schemas or transient backend overload.
• How to fix it: Verify format_verification is set to true in the split directive. Retry the merge endpoint independently if the initial decomposition succeeded.
• Code showing the fix: triggerMerge isolates the merge POST operation and returns a specific error for non-2xx responses.

Official References

• Genesys Cloud LLM Gateway API Documentation
• Genesys Cloud OAuth 2.0 Client Credentials Flow
• Go HTTP Client and Retry Patterns
• Genesys Cloud API Rate Limiting Guidelines