feat(T4.1-T4.4): implement advanced operations & analytics (part 1)
T4.1: Real-time Metrics Dashboard - Add internal/dashboard package with MetricsAggregator - Record, aggregate, and query metrics - Percentile calculations (p50, p95, p99) - Time-series data with max size eviction - 13 metrics tests, all passing T4.2: Workflow Visualization & DAG Rendering - Add internal/visualization package with DAGRenderer - Convert dependency graphs to DOT format - Critical path highlighting - Topological sorting with parallel task detection - HTML rendering for visualization - 11 DAG rendering tests, all passing T4.3: Advanced Search & Filtering - Add internal/search package with WorkflowSearch - Full-text indexing with word-based lookup - Filter by status, assignee, tag, date range - Regex pattern matching - Saved filters for reusable queries - 15 search tests, all passing T4.4: Cost Tracking & Optimization - Add internal/cost package with CostTracker - Track LLM API costs (by token) - Track git operation costs - Track compute resource costs (by duration) - Cost aggregation by workflow/type - Optimization recommendations - 11 cost tests, all passing Total T4.1-T4.4: 50 tests passing Next: T4.5-T4.8 (alerting, profiling, multi-cluster, self-deployment)
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package cost
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import (
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"fmt"
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"sync"
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"time"
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)
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// CostEntry represents a tracked cost
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type CostEntry struct {
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ID string
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Type string // llm, git, compute
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WorkflowID string
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TaskID string
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Amount float64
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Timestamp time.Time
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Metadata map[string]interface{}
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}
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// CostTracker tracks and analyzes workflow costs
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type CostTracker struct {
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mu sync.RWMutex
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entries []*CostEntry
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rates map[string]float64
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}
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// NewCostTracker creates a new cost tracker
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func NewCostTracker() *CostTracker {
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return &CostTracker{
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entries: make([]*CostEntry, 0),
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rates: map[string]float64{
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"llm_token": 0.0001, // $0.0001 per token
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"git_push": 0.0, // Free
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"compute_hour": 0.5, // $0.5 per hour
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},
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}
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}
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// TrackLLMCost tracks LLM API costs
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func (ct *CostTracker) TrackLLMCost(workflowID, taskID string, tokens int) {
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cost := float64(tokens) * ct.rates["llm_token"]
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ct.mu.Lock()
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defer ct.mu.Unlock()
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entry := &CostEntry{
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ID: fmt.Sprintf("llm-%d", len(ct.entries)),
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Type: "llm",
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WorkflowID: workflowID,
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TaskID: taskID,
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Amount: cost,
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Timestamp: time.Now(),
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Metadata: map[string]interface{}{
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"tokens": tokens,
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},
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}
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ct.entries = append(ct.entries, entry)
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}
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// TrackGitCost tracks git operation costs
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func (ct *CostTracker) TrackGitCost(workflowID string, operations int) {
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ct.mu.Lock()
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defer ct.mu.Unlock()
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entry := &CostEntry{
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ID: fmt.Sprintf("git-%d", len(ct.entries)),
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Type: "git",
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WorkflowID: workflowID,
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Amount: 0,
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Timestamp: time.Now(),
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Metadata: map[string]interface{}{
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"operations": operations,
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},
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}
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ct.entries = append(ct.entries, entry)
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}
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// TrackComputeCost tracks compute resource costs (duration in milliseconds)
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func (ct *CostTracker) TrackComputeCost(workflowID, taskID string, durationMs float64) {
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// Convert milliseconds to hours
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durationHours := durationMs / (1000.0 * 3600.0)
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cost := durationHours * ct.rates["compute_hour"]
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ct.mu.Lock()
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defer ct.mu.Unlock()
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entry := &CostEntry{
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ID: fmt.Sprintf("compute-%d", len(ct.entries)),
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Type: "compute",
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WorkflowID: workflowID,
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TaskID: taskID,
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Amount: cost,
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Timestamp: time.Now(),
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Metadata: map[string]interface{}{
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"duration_ms": durationMs,
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},
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}
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ct.entries = append(ct.entries, entry)
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}
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// GetTotalCost returns total cost for all workflows
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func (ct *CostTracker) GetTotalCost() float64 {
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ct.mu.RLock()
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defer ct.mu.RUnlock()
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total := 0.0
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for _, entry := range ct.entries {
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total += entry.Amount
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}
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return total
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}
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// GetWorkflowCost returns total cost for a specific workflow
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func (ct *CostTracker) GetWorkflowCost(workflowID string) float64 {
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ct.mu.RLock()
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defer ct.mu.RUnlock()
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total := 0.0
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for _, entry := range ct.entries {
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if entry.WorkflowID == workflowID {
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total += entry.Amount
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}
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}
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return total
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}
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// GetCostByType returns total cost by type
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func (ct *CostTracker) GetCostByType(costType string) float64 {
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ct.mu.RLock()
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defer ct.mu.RUnlock()
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total := 0.0
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for _, entry := range ct.entries {
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if entry.Type == costType {
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total += entry.Amount
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}
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}
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return total
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}
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// GetAverageCostPerTask returns average cost per task
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func (ct *CostTracker) GetAverageCostPerTask(workflowID string) float64 {
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ct.mu.RLock()
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defer ct.mu.RUnlock()
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total := 0.0
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count := 0
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for _, entry := range ct.entries {
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if entry.WorkflowID == workflowID {
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total += entry.Amount
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count++
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}
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}
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if count == 0 {
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return 0
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}
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return total / float64(count)
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}
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// GetOptimizationSuggestions returns cost optimization recommendations
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func (ct *CostTracker) GetOptimizationSuggestions(workflowID string) []string {
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suggestions := make([]string, 0)
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ct.mu.RLock()
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defer ct.mu.RUnlock()
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llmCost := 0.0
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computeCost := 0.0
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for _, entry := range ct.entries {
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if entry.WorkflowID == workflowID {
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if entry.Type == "llm" {
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llmCost += entry.Amount
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} else if entry.Type == "compute" {
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computeCost += entry.Amount
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}
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}
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}
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if llmCost > computeCost*2 {
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suggestions = append(suggestions, "Consider caching LLM results to reduce API calls")
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}
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if computeCost > llmCost*2 {
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suggestions = append(suggestions, "Consider parallelizing compute tasks")
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}
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return suggestions
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}
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// GetEntries returns all cost entries
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func (ct *CostTracker) GetEntries() []*CostEntry {
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ct.mu.RLock()
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defer ct.mu.RUnlock()
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result := make([]*CostEntry, len(ct.entries))
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copy(result, ct.entries)
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return result
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}
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// GetEntriesForWorkflow returns cost entries for a workflow
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func (ct *CostTracker) GetEntriesForWorkflow(workflowID string) []*CostEntry {
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ct.mu.RLock()
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defer ct.mu.RUnlock()
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result := make([]*CostEntry, 0)
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for _, entry := range ct.entries {
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if entry.WorkflowID == workflowID {
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result = append(result, entry)
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}
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}
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return result
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}
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// SetRate sets the cost rate for a type
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func (ct *CostTracker) SetRate(costType string, rate float64) {
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ct.mu.Lock()
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defer ct.mu.Unlock()
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ct.rates[costType] = rate
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}
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// GetRate gets the cost rate for a type
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func (ct *CostTracker) GetRate(costType string) float64 {
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ct.mu.RLock()
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defer ct.mu.RUnlock()
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return ct.rates[costType]
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}
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// Clear clears all cost entries
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func (ct *CostTracker) Clear() {
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ct.mu.Lock()
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defer ct.mu.Unlock()
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ct.entries = make([]*CostEntry, 0)
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}
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