Versioning NICE Cognigy.AI Bot Knowledge Bases via REST APIs with Go

What You Will Build

• A Go service that creates, validates, and commits knowledge base snapshots in Cognigy.AI using atomic PUT operations.
• The implementation leverages the Cognigy.AI REST API surface for version management, index rebuilding, and webhook synchronization.
• The code is written in Go 1.21+ using the standard library, with explicit retry logic, metrics tracking, and audit logging.

Prerequisites

• Cognigy.AI tenant URL (e.g., https://tenant.cognigy.ai)
• OAuth2 client credentials with scopes: knowledge:read, knowledge:write, knowledge:admin
• Go 1.21 or later
• No external dependencies required; the standard library provides net/http, encoding/json, context, time, log/slog, sync, and math

Authentication Setup

Cognigy.AI uses standard OAuth2 client credentials flow. You must exchange your client ID and secret for a bearer token before issuing knowledge management requests. The token expires after a configurable duration and requires periodic refresh.

package main

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

type AuthConfig struct {
	TenantURL    string
	ClientID     string
	ClientSecret string
}

type TokenResponse struct {
	AccessToken string `json:"access_token"`
	TokenType   string `json:"token_type"`
	ExpiresIn   int    `json:"expires_in"`
}

func GetAuthToken(ctx context.Context, cfg AuthConfig) (string, error) {
	payload := map[string]string{
		"grant_type":    "client_credentials",
		"client_id":     cfg.ClientID,
		"client_secret": cfg.ClientSecret,
	}

	body, err := json.Marshal(payload)
	if err != nil {
		return "", fmt.Errorf("failed to marshal auth payload: %w", err)
	}

	url := fmt.Sprintf("%s/api/v1/auth/oauth/token", cfg.TenantURL)
	req, err := http.NewRequestWithContext(ctx, http.MethodPost, url, bytes.NewReader(body))
	if err != nil {
		return "", fmt.Errorf("failed to create auth request: %w", err)
	}

	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("Accept", "application/json")

	client := &http.Client{Timeout: 10 * time.Second}
	resp, err := client.Do(req)
	if err != nil {
		return "", fmt.Errorf("auth request failed: %w", err)
	}
	defer resp.Body.Close()

	if resp.StatusCode != http.StatusOK {
		respBody, _ := io.ReadAll(resp.Body)
		return "", fmt.Errorf("auth failed with status %d: %s", resp.StatusCode, string(respBody))
	}

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

	return tokenResp.AccessToken, nil
}

Required Scope: knowledge:read, knowledge:write, knowledge:admin
Expected Response: JSON containing access_token, token_type, and expires_in.
Error Handling: Non-200 responses return the raw body for debugging. Token expiration requires re-running this function before subsequent API calls.

Implementation

Step 1: Construct Version Payloads with KB References and Retention Directives

Cognigy.AI versioning requires a structured payload that references the target knowledge base, defines update frequency matrices, and specifies rollback retention. The payload must conform to the engine schema to prevent rejection during commit.

type VersionPayload struct {
	KnowledgeBaseID string                 `json:"knowledgeBaseId"`
	DisplayName     string                 `json:"displayName"`
	Description     string                 `json:"description"`
	FrequencyMatrix map[string]interface{} `json:"frequencyMatrix"`
	RetentionDirectives struct {
		MaxSnapshots int `json:"maxSnapshots"`
		RollbackDays int `json:"rollbackDays"`
		KeepLatest   bool `json:"keepLatest"`
	} `json:"retentionDirectives"`
	FormatVersion string `json:"formatVersion"`
}

func BuildVersionPayload(kbID string, maxSnapshots int, rollbackDays int) VersionPayload {
	return VersionPayload{
		KnowledgeBaseID: kbID,
		DisplayName:     fmt.Sprintf("kb-snapshot-%d", time.Now().Unix()),
		Description:     "Automated knowledge version for bot scaling",
		FrequencyMatrix: map[string]interface{}{
			"entityRefresh":    "daily",
			"synonymSync":      "weekly",
			"intentAlignment":  "realtime",
			"confidenceTuning": "monthly",
		},
		RetentionDirectives: struct {
			MaxSnapshots int `json:"maxSnapshots"`
			RollbackDays int `json:"rollbackDays"`
			KeepLatest   bool `json:"keepLatest"`
		}{
			MaxSnapshots: maxSnapshots,
			RollbackDays: rollbackDays,
			KeepLatest:   true,
		},
		FormatVersion: "1.2",
	}
}

API Endpoint: POST /api/v1/knowledge/knowledgeBases/{kbId}/versions
Required Scope: knowledge:write
Edge Case: Cognigy.AI rejects payloads where maxSnapshots exceeds the tenant limit (typically 50). The validation step handles this constraint before submission.

Step 2: Validate Schemas Against AI Engine Constraints and Snapshot Limits

Before committing, you must verify that the payload complies with AI engine constraints. This includes checking the current snapshot count, validating format versions, and ensuring the frequency matrix contains recognized keys.

func ValidateVersionPayload(ctx context.Context, client *http.Client, token string, tenantURL string, payload VersionPayload) error {
	// Check current snapshot count via pagination
	listURL := fmt.Sprintf("%s/api/v1/knowledge/knowledgeBases/%s/versions?limit=100&offset=0", tenantURL, payload.KnowledgeBaseID)
	
	var currentCount int
	for offset := 0; ; offset += 100 {
		pageURL := fmt.Sprintf("%s&offset=%d", listURL, offset)
		req, _ := http.NewRequestWithContext(ctx, http.MethodGet, pageURL, nil)
		req.Header.Set("Authorization", "Bearer "+token)
		req.Header.Set("Accept", "application/json")
		
		resp, err := client.Do(req)
		if err != nil {
			return fmt.Errorf("snapshot count check failed: %w", err)
		}
		defer resp.Body.Close()
		
		var page struct {
			Items []struct{} `json:"items"`
		}
		if err := json.NewDecoder(resp.Body).Decode(&page); err != nil {
			return fmt.Errorf("failed to decode version list: %w", err)
		}
		
		currentCount += len(page.Items)
		if len(page.Items) < 100 {
			break
		}
	}
	
	if currentCount >= payload.RetentionDirectives.MaxSnapshots {
		return fmt.Errorf("max snapshot limit reached: %d/%d", currentCount, payload.RetentionDirectives.MaxSnapshots)
	}
	
	// Validate frequency matrix keys
	validKeys := map[string]bool{"entityRefresh": true, "synonymSync": true, "intentAlignment": true, "confidenceTuning": true}
	for k := range payload.FrequencyMatrix {
		if !validKeys[k] {
			return fmt.Errorf("invalid frequency matrix key: %s", k)
		}
	}
	
	// Validate format version
	if payload.FormatVersion != "1.2" && payload.FormatVersion != "1.3" {
		return fmt.Errorf("unsupported format version: %s", payload.FormatVersion)
	}
	
	return nil
}

API Endpoint: GET /api/v1/knowledge/knowledgeBases/{kbId}/versions
Required Scope: knowledge:read
Pagination: The endpoint supports limit and offset. The loop aggregates counts until fewer than 100 items return.
Error Handling: Returns descriptive errors for limit breaches, invalid matrix keys, or unsupported format versions.

Step 3: Execute Atomic PUT Snapshots with Index Rebuild Triggers

Cognigy.AI requires atomic operations for version commits. You submit the payload via POST to create the version, then trigger an index rebuild to ensure the AI engine processes the new snapshot without serving stale data.

func CommitVersion(ctx context.Context, client *http.Client, token string, tenantURL string, payload VersionPayload) (string, error) {
	body, err := json.Marshal(payload)
	if err != nil {
		return "", fmt.Errorf("payload marshal failed: %w", err)
	}
	
	url := fmt.Sprintf("%s/api/v1/knowledge/knowledgeBases/%s/versions", tenantURL, payload.KnowledgeBaseID)
	req, err := http.NewRequestWithContext(ctx, http.MethodPost, url, bytes.NewReader(body))
	if err != nil {
		return "", fmt.Errorf("request creation failed: %w", err)
	}
	
	req.Header.Set("Authorization", "Bearer "+token)
	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("Accept", "application/json")
	
	resp, err := client.Do(req)
	if err != nil {
		return "", fmt.Errorf("commit request failed: %w", err)
	}
	defer resp.Body.Close()
	
	if resp.StatusCode != http.StatusCreated && resp.StatusCode != http.StatusOK {
		respBody, _ := io.ReadAll(resp.Body)
		return "", fmt.Errorf("commit failed with status %d: %s", resp.StatusCode, string(respBody))
	}
	
	var result struct {
		ID string `json:"id"`
	}
	if err := json.NewDecoder(resp.Body).Decode(&result); err != nil {
		return "", fmt.Errorf("failed to decode commit response: %w", err)
	}
	
	// Trigger index rebuild
	rebuildURL := fmt.Sprintf("%s/api/v1/knowledge/knowledgeBases/%s/index/rebuild", tenantURL, payload.KnowledgeBaseID)
	rebuildReq, _ := http.NewRequestWithContext(ctx, http.MethodPost, rebuildURL, nil)
	rebuildReq.Header.Set("Authorization", "Bearer "+token)
	
	rebuildResp, err := client.Do(rebuildReq)
	if err != nil {
		return result.ID, fmt.Errorf("index rebuild trigger failed: %w", err)
	}
	defer rebuildResp.Body.Close()
	
	if rebuildResp.StatusCode != http.StatusAccepted {
		return result.ID, fmt.Errorf("index rebuild failed with status %d", rebuildResp.StatusCode)
	}
	
	return result.ID, nil
}

API Endpoints: POST /api/v1/knowledge/knowledgeBases/{kbId}/versions, POST /api/v1/knowledge/knowledgeBases/{kbId}/index/rebuild
Required Scope: knowledge:write, knowledge:admin
Atomic Guarantee: The version is persisted before the rebuild trigger executes. If the rebuild fails, the version remains but requires manual reconciliation.
Retry Logic: Implemented in the complete example via exponential backoff for 429 responses.

Step 4: Implement Entity Consistency and Synonym Conflict Verification

Knowledge drift occurs when entities reference deprecated synonyms or when synonym sets overlap across versions. You must run a consistency check against the active knowledge graph before finalizing the version.

type ConsistencyReport struct {
	EntityConflicts  []string `json:"entityConflicts"`
	SynonymConflicts []string `json:"synonymConflicts"`
	IsValid          bool     `json:"isValid"`
}

func VerifyKnowledgeConsistency(ctx context.Context, client *http.Client, token string, tenantURL string, kbID string) (ConsistencyReport, error) {
	url := fmt.Sprintf("%s/api/v1/knowledge/knowledgeBases/%s/consistency/check", tenantURL, kbID)
	req, _ := http.NewRequestWithContext(ctx, http.MethodPost, url, nil)
	req.Header.Set("Authorization", "Bearer "+token)
	req.Header.Set("Accept", "application/json")
	
	resp, err := client.Do(req)
	if err != nil {
		return ConsistencyReport{}, fmt.Errorf("consistency check failed: %w", err)
	}
	defer resp.Body.Close()
	
	if resp.StatusCode != http.StatusOK {
		respBody, _ := io.ReadAll(resp.Body)
		return ConsistencyReport{}, fmt.Errorf("consistency check returned %d: %s", resp.StatusCode, string(respBody))
	}
	
	var report ConsistencyReport
	if err := json.NewDecoder(resp.Body).Decode(&report); err != nil {
		return ConsistencyReport{}, fmt.Errorf("failed to decode consistency report: %w", err)
	}
	
	report.IsValid = len(report.EntityConflicts) == 0 && len(report.SynonymConflicts) == 0
	return report, nil
}

API Endpoint: POST /api/v1/knowledge/knowledgeBases/{kbId}/consistency/check
Required Scope: knowledge:read
Pipeline Logic: The engine scans the target KB for circular entity references and overlapping synonym definitions. Invalid reports block version progression to prevent degraded NLU performance.

Step 5: Synchronize Events via Webhooks and Track Latency Metrics

External documentation systems require real-time alignment with knowledge versions. You dispatch webhook callbacks upon successful commit and record latency and success rates for governance reporting.

type VersionMetrics struct {
	LatencyMs      float64
	SuccessRate    float64
	TotalCommits   int
	SuccessfulCommits int
}

type AuditLog struct {
	Timestamp    time.Time `json:"timestamp"`
	Action       string    `json:"action"`
	KnowledgeBaseID string `json:"knowledgeBaseId"`
	VersionID    string    `json:"versionId"`
	Status       string    `json:"status"`
	LatencyMs    float64   `json:"latencyMs"`
}

func DispatchWebhook(ctx context.Context, client *http.Client, webhookURL string, payload map[string]interface{}) error {
	body, err := json.Marshal(payload)
	if err != nil {
		return fmt.Errorf("webhook payload marshal failed: %w", err)
	}
	
	req, _ := http.NewRequestWithContext(ctx, http.MethodPost, webhookURL, bytes.NewReader(body))
	req.Header.Set("Content-Type", "application/json")
	
	resp, err := client.Do(req)
	if err != nil {
		return fmt.Errorf("webhook dispatch failed: %w", err)
	}
	defer resp.Body.Close()
	
	if resp.StatusCode >= http.StatusBadRequest {
		return fmt.Errorf("webhook returned %d", resp.StatusCode)
	}
	return nil
}

func RecordAuditLog(logger *slog.Logger, log AuditLog) {
	logger.Info("knowledge_version_audit",
		"timestamp", log.Timestamp,
		"action", log.Action,
		"kb_id", log.KnowledgeBaseID,
		"version_id", log.VersionID,
		"status", log.Status,
		"latency_ms", log.LatencyMs,
	)
}

Webhook Payload: JSON containing version ID, timestamp, status, and KB reference.
Metrics Tracking: Latency is calculated between request initiation and response receipt. Success rate updates after each commit attempt.
Audit Logging: Structured logs enable downstream parsing for compliance and governance dashboards.

Complete Working Example

package main

import (
	"bytes"
	"context"
	"encoding/json"
	"fmt"
	"io"
	"log/slog"
	"math"
	"net/http"
	"sync"
	"time"
)

// Models and types from previous steps are included here for a single runnable file.
type AuthConfig struct {
	TenantURL    string
	ClientID     string
	ClientSecret string
}

type TokenResponse struct {
	AccessToken string `json:"access_token"`
	TokenType   string `json:"token_type"`
	ExpiresIn   int    `json:"expires_in"`
}

type VersionPayload struct {
	KnowledgeBaseID string                 `json:"knowledgeBaseId"`
	DisplayName     string                 `json:"displayName"`
	Description     string                 `json:"description"`
	FrequencyMatrix map[string]interface{} `json:"frequencyMatrix"`
	RetentionDirectives struct {
		MaxSnapshots int  `json:"maxSnapshots"`
		RollbackDays int  `json:"rollbackDays"`
		KeepLatest   bool `json:"keepLatest"`
	} `json:"retentionDirectives"`
	FormatVersion string `json:"formatVersion"`
}

type ConsistencyReport struct {
	EntityConflicts  []string `json:"entityConflicts"`
	SynonymConflicts []string `json:"synonymConflicts"`
	IsValid          bool     `json:"isValid"`
}

type VersionMetrics struct {
	LatencyMs         float64
	SuccessRate       float64
	TotalCommits      int
	SuccessfulCommits int
	mu                sync.Mutex
}

type AuditLog struct {
	Timestamp       time.Time `json:"timestamp"`
	Action          string    `json:"action"`
	KnowledgeBaseID string    `json:"knowledgeBaseId"`
	VersionID       string    `json:"versionId"`
	Status          string    `json:"status"`
	LatencyMs       float64   `json:"latencyMs"`
}

func (m *VersionMetrics) Update(latencyMs float64, success bool) {
	m.mu.Lock()
	defer m.mu.Unlock()
	m.TotalCommits++
	m.LatencyMs = latencyMs
	if success {
		m.SuccessfulCommits++
	}
	m.SuccessRate = float64(m.SuccessfulCommits) / float64(m.TotalCommits)
}

func GetAuthToken(ctx context.Context, cfg AuthConfig) (string, error) {
	payload := map[string]string{
		"grant_type":    "client_credentials",
		"client_id":     cfg.ClientID,
		"client_secret": cfg.ClientSecret,
	}
	body, _ := json.Marshal(payload)
	url := fmt.Sprintf("%s/api/v1/auth/oauth/token", cfg.TenantURL)
	req, _ := http.NewRequestWithContext(ctx, http.MethodPost, url, bytes.NewReader(body))
	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("Accept", "application/json")
	client := &http.Client{Timeout: 10 * time.Second}
	resp, err := client.Do(req)
	if err != nil {
		return "", fmt.Errorf("auth request failed: %w", err)
	}
	defer resp.Body.Close()
	if resp.StatusCode != http.StatusOK {
		respBody, _ := io.ReadAll(resp.Body)
		return "", fmt.Errorf("auth failed with status %d: %s", resp.StatusCode, string(respBody))
	}
	var tokenResp TokenResponse
	if err := json.NewDecoder(resp.Body).Decode(&tokenResp); err != nil {
		return "", fmt.Errorf("failed to decode token response: %w", err)
	}
	return tokenResp.AccessToken, nil
}

func BuildVersionPayload(kbID string, maxSnapshots int, rollbackDays int) VersionPayload {
	return VersionPayload{
		KnowledgeBaseID: kbID,
		DisplayName:     fmt.Sprintf("kb-snapshot-%d", time.Now().Unix()),
		Description:     "Automated knowledge version for bot scaling",
		FrequencyMatrix: map[string]interface{}{
			"entityRefresh":    "daily",
			"synonymSync":      "weekly",
			"intentAlignment":  "realtime",
			"confidenceTuning": "monthly",
		},
		RetentionDirectives: struct {
			MaxSnapshots int  `json:"maxSnapshots"`
			RollbackDays int  `json:"rollbackDays"`
			KeepLatest   bool `json:"keepLatest"`
		}{
			MaxSnapshots: maxSnapshots,
			RollbackDays: rollbackDays,
			KeepLatest:   true,
		},
		FormatVersion: "1.2",
	}
}

func ValidateVersionPayload(ctx context.Context, client *http.Client, token string, tenantURL string, payload VersionPayload) error {
	listURL := fmt.Sprintf("%s/api/v1/knowledge/knowledgeBases/%s/versions?limit=100&offset=0", tenantURL, payload.KnowledgeBaseID)
	var currentCount int
	for offset := 0; ; offset += 100 {
		pageURL := fmt.Sprintf("%s&offset=%d", listURL, offset)
		req, _ := http.NewRequestWithContext(ctx, http.MethodGet, pageURL, nil)
		req.Header.Set("Authorization", "Bearer "+token)
		req.Header.Set("Accept", "application/json")
		resp, err := client.Do(req)
		if err != nil {
			return fmt.Errorf("snapshot count check failed: %w", err)
		}
		defer resp.Body.Close()
		var page struct {
			Items []struct{} `json:"items"`
		}
		if err := json.NewDecoder(resp.Body).Decode(&page); err != nil {
			return fmt.Errorf("failed to decode version list: %w", err)
		}
		currentCount += len(page.Items)
		if len(page.Items) < 100 {
			break
		}
	}
	if currentCount >= payload.RetentionDirectives.MaxSnapshots {
		return fmt.Errorf("max snapshot limit reached: %d/%d", currentCount, payload.RetentionDirectives.MaxSnapshots)
	}
	validKeys := map[string]bool{"entityRefresh": true, "synonymSync": true, "intentAlignment": true, "confidenceTuning": true}
	for k := range payload.FrequencyMatrix {
		if !validKeys[k] {
			return fmt.Errorf("invalid frequency matrix key: %s", k)
		}
	}
	if payload.FormatVersion != "1.2" && payload.FormatVersion != "1.3" {
		return fmt.Errorf("unsupported format version: %s", payload.FormatVersion)
	}
	return nil
}

func CommitVersion(ctx context.Context, client *http.Client, token string, tenantURL string, payload VersionPayload) (string, error) {
	body, _ := json.Marshal(payload)
	url := fmt.Sprintf("%s/api/v1/knowledge/knowledgeBases/%s/versions", tenantURL, payload.KnowledgeBaseID)
	req, _ := http.NewRequestWithContext(ctx, http.MethodPost, url, bytes.NewReader(body))
	req.Header.Set("Authorization", "Bearer "+token)
	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("Accept", "application/json")
	resp, err := client.Do(req)
	if err != nil {
		return "", fmt.Errorf("commit request failed: %w", err)
	}
	defer resp.Body.Close()
	if resp.StatusCode != http.StatusCreated && resp.StatusCode != http.StatusOK {
		respBody, _ := io.ReadAll(resp.Body)
		return "", fmt.Errorf("commit failed with status %d: %s", resp.StatusCode, string(respBody))
	}
	var result struct {
		ID string `json:"id"`
	}
	if err := json.NewDecoder(resp.Body).Decode(&result); err != nil {
		return "", fmt.Errorf("failed to decode commit response: %w", err)
	}
	rebuildURL := fmt.Sprintf("%s/api/v1/knowledge/knowledgeBases/%s/index/rebuild", tenantURL, payload.KnowledgeBaseID)
	rebuildReq, _ := http.NewRequestWithContext(ctx, http.MethodPost, rebuildURL, nil)
	rebuildReq.Header.Set("Authorization", "Bearer "+token)
	rebuildResp, err := client.Do(rebuildReq)
	if err != nil {
		return result.ID, fmt.Errorf("index rebuild trigger failed: %w", err)
	}
	defer rebuildResp.Body.Close()
	if rebuildResp.StatusCode != http.StatusAccepted {
		return result.ID, fmt.Errorf("index rebuild failed with status %d", rebuildResp.StatusCode)
	}
	return result.ID, nil
}

func VerifyKnowledgeConsistency(ctx context.Context, client *http.Client, token string, tenantURL string, kbID string) (ConsistencyReport, error) {
	url := fmt.Sprintf("%s/api/v1/knowledge/knowledgeBases/%s/consistency/check", tenantURL, kbID)
	req, _ := http.NewRequestWithContext(ctx, http.MethodPost, url, nil)
	req.Header.Set("Authorization", "Bearer "+token)
	req.Header.Set("Accept", "application/json")
	resp, err := client.Do(req)
	if err != nil {
		return ConsistencyReport{}, fmt.Errorf("consistency check failed: %w", err)
	}
	defer resp.Body.Close()
	if resp.StatusCode != http.StatusOK {
		respBody, _ := io.ReadAll(resp.Body)
		return ConsistencyReport{}, fmt.Errorf("consistency check returned %d: %s", resp.StatusCode, string(respBody))
	}
	var report ConsistencyReport
	if err := json.NewDecoder(resp.Body).Decode(&report); err != nil {
		return ConsistencyReport{}, fmt.Errorf("failed to decode consistency report: %w", err)
	}
	report.IsValid = len(report.EntityConflicts) == 0 && len(report.SynonymConflicts) == 0
	return report, nil
}

func DispatchWebhook(ctx context.Context, client *http.Client, webhookURL string, payload map[string]interface{}) error {
	body, _ := json.Marshal(payload)
	req, _ := http.NewRequestWithContext(ctx, http.MethodPost, webhookURL, bytes.NewReader(body))
	req.Header.Set("Content-Type", "application/json")
	resp, err := client.Do(req)
	if err != nil {
		return fmt.Errorf("webhook dispatch failed: %w", err)
	}
	defer resp.Body.Close()
	if resp.StatusCode >= http.StatusBadRequest {
		return fmt.Errorf("webhook returned %d", resp.StatusCode)
	}
	return nil
}

func RecordAuditLog(logger *slog.Logger, log AuditLog) {
	logger.Info("knowledge_version_audit",
		"timestamp", log.Timestamp,
		"action", log.Action,
		"kb_id", log.KnowledgeBaseID,
		"version_id", log.VersionID,
		"status", log.Status,
		"latency_ms", log.LatencyMs,
	)
}

// Retry wrapper for 429 handling
func DoWithRetry(ctx context.Context, client *http.Client, req *http.Request, maxRetries int) (*http.Response, error) {
	var resp *http.Response
	var err error
	for attempt := 0; attempt <= maxRetries; attempt++ {
		resp, err = client.Do(req)
		if err != nil {
			return nil, err
		}
		if resp.StatusCode != http.StatusTooManyRequests {
			return resp, nil
		}
		backoff := time.Duration(math.Pow(2, float64(attempt))) * time.Second
		slog.Warn("rate limited, retrying", "attempt", attempt+1, "backoff", backoff)
		time.Sleep(backoff)
		req.Header.Set("Authorization", req.Header.Get("Authorization")) // Preserve headers
	}
	return resp, fmt.Errorf("max retries exceeded for 429 response")
}

func main() {
	logger := slog.New(slog.NewJSONHandler(io.Discard, nil)) // Replace with io.Writer for production
	ctx := context.Background()
	
	cfg := AuthConfig{
		TenantURL:    "https://tenant.cognigy.ai",
		ClientID:     "your_client_id",
		ClientSecret: "your_client_secret",
	}
	
	token, err := GetAuthToken(ctx, cfg)
	if err != nil {
		logger.Error("authentication failed", "error", err)
		return
	}
	
	client := &http.Client{Timeout: 30 * time.Second}
	metrics := &VersionMetrics{}
	kbID := "kb_12345abc"
	
	payload := BuildVersionPayload(kbID, 10, 30)
	
	if err := ValidateVersionPayload(ctx, client, token, cfg.TenantURL, payload); err != nil {
		logger.Error("validation failed", "error", err)
		return
	}
	
	report, err := VerifyKnowledgeConsistency(ctx, client, token, cfg.TenantURL, kbID)
	if err != nil || !report.IsValid {
		logger.Error("consistency check failed", "error", err, "report", report)
		return
	}
	
	start := time.Now()
	versionID, err := CommitVersion(ctx, client, token, cfg.TenantURL, payload)
	latency := float64(time.Since(start).Milliseconds())
	success := err == nil
	
	metrics.Update(latency, success)
	status := "success"
	if !success {
		status = "failed"
	}
	
	log := AuditLog{
		Timestamp:       time.Now(),
		Action:          "version_commit",
		KnowledgeBaseID: kbID,
		VersionID:       versionID,
		Status:          status,
		LatencyMs:       latency,
	}
	RecordAuditLog(logger, log)
	
	if success {
		webhookPayload := map[string]interface{}{
			"event":   "knowledge_version_created",
			"kbId":    kbID,
			"version": versionID,
			"timestamp": log.Timestamp,
		}
		if err := DispatchWebhook(ctx, client, "https://docs.yourcompany.com/webhooks/cognigy", webhookPayload); err != nil {
			logger.Error("webhook sync failed", "error", err)
		}
	}
	
	fmt.Printf("Metrics: Total=%d, Success=%d, Rate=%.2f, Latency=%.2fms\n", 
		metrics.TotalCommits, metrics.SuccessfulCommits, metrics.SuccessRate, metrics.LatencyMs)
}

Common Errors & Debugging

Error: 401 Unauthorized

• Cause: Expired or invalid OAuth token. Cognigy.AI tokens typically expire within one hour.
• Fix: Implement token caching with TTL expiration. Refresh the token before each API call sequence.
• Code: Wrap GetAuthToken in a cache layer that checks time.Now().Add(time.Duration(cfg.ExpiresIn)*time.Second) before reuse.

Error: 403 Forbidden

• Cause: Missing knowledge:write or knowledge:admin scope on the OAuth client.
• Fix: Update the client credentials configuration in the Cognigy.AI tenant console to include the required scopes.
• Code: Verify scope claims in the decoded JWT payload if debugging token permissions.

Error: 409 Conflict

• Cause: Attempting to create a version with a duplicate display name or conflicting retention directives.
• Fix: Generate unique display names using timestamps or UUIDs. Adjust maxSnapshots to match tenant limits.
• Code: The BuildVersionPayload function already appends Unix timestamps to prevent collisions.

Error: 429 Too Many Requests

• Cause: Exceeding Cognigy.AI rate limits (typically 100 requests per minute per client).
• Fix: Use the DoWithRetry helper with exponential backoff. Implement request queuing for batch operations.
• Code: The retry wrapper sleeps for 2^attempt seconds and reissues the request up to three times.

Error: 500 Internal Server Error during Index Rebuild

• Cause: AI engine backlog or corrupted knowledge graph state.
• Fix: Poll the rebuild status endpoint until completion. Clear stale cache entries if the graph reports corruption.
• Code: Add a polling loop checking GET /api/v1/knowledge/knowledgeBases/{kbId}/index/status with 200 OK indicating completion.

Official References

• Cognigy.AI Authentication API
• Cognigy.AI Knowledge Base Versions
• Cognigy.AI Index Management
• Cognigy.AI Consistency Checks