fix(parser): map LTF IterationsToFirstSuccess and DriftScore

internal/exporter/json.go

@@ -59,14 +59,16 @@ type jsonTokens struct {
 }
 
 type jsonSummary struct {
-	TotalIterations   int      `json:"total_iterations"`
-	TotalTokens       int      `json:"total_tokens"`
-	TotalCostUSD      float64  `json:"total_cost_usd"`
-	TotalDurationMs   int64    `json:"total_duration_ms"`
-	TerminationReason string   `json:"termination_reason"`
-	FilesChanged      []string `json:"files_changed"`
-	ConvergenceRate   float64  `json:"convergence_rate"`
-	VerifyPassRate    float64  `json:"verify_pass_rate"`
+	TotalIterations          int      `json:"total_iterations"`
+	TotalTokens              int      `json:"total_tokens"`
+	TotalCostUSD             float64  `json:"total_cost_usd"`
+	TotalDurationMs          int64    `json:"total_duration_ms"`
+	TerminationReason        string   `json:"termination_reason"`
+	FilesChanged             []string `json:"files_changed"`
+	ConvergenceRate          float64  `json:"convergence_rate"`
+	VerifyPassRate           float64  `json:"verify_pass_rate"`
+	IterationsToFirstSuccess int      `json:"iterations_to_first_success,omitempty"`
+	DriftScore               float64  `json:"drift_score,omitempty"`
 }
 
 func ExportJSON(t *trace.Trace, outputPath string) error {
@@ -119,14 +121,16 @@ func ExportJSON(t *trace.Trace, outputPath string) error {
 
 	if t.Summary != nil {
 		jt.Summary = &jsonSummary{
-			TotalIterations:   t.Summary.TotalIterations,
-			TotalTokens:       t.Summary.TotalTokens,
-			TotalCostUSD:      t.Summary.TotalCostUSD,
-			TotalDurationMs:   t.Summary.TotalDurationMs,
-			TerminationReason: t.Summary.TerminationReason,
-			FilesChanged:      t.Summary.FilesChanged,
-			ConvergenceRate:   t.Summary.ConvergenceRate,
-			VerifyPassRate:    t.Summary.VerifyPassRate,
+			TotalIterations:          t.Summary.TotalIterations,
+			TotalTokens:              t.Summary.TotalTokens,
+			TotalCostUSD:             t.Summary.TotalCostUSD,
+			TotalDurationMs:          t.Summary.TotalDurationMs,
+			TerminationReason:        t.Summary.TerminationReason,
+			FilesChanged:             t.Summary.FilesChanged,
+			ConvergenceRate:          t.Summary.ConvergenceRate,
+			VerifyPassRate:           t.Summary.VerifyPassRate,
+			IterationsToFirstSuccess: t.Summary.IterationsToFirstSuccess,
+			DriftScore:               t.Summary.DriftScore,
 		}
 	}
 

internal/parser/ltf.go

@@ -31,17 +31,17 @@ type ltfEvent struct {
 	Metadata   any         `json:"metadata"`
 
 	// loop_summary fields
-	StartedAt            string       `json:"started_at"`
-	EndedAt              string       `json:"ended_at"`
-	TotalIterations      int          `json:"total_iterations"`
-	TotalTokens          int          `json:"total_tokens"`
-	TotalCostUSD         float64      `json:"total_cost_usd"`
-	TotalDurationMs      int64        `json:"total_duration_ms"`
-	TerminationReason    string       `json:"termination_reason"`
-	Convergence          *ltfConv     `json:"convergence"`
-	FilesChanged         []string     `json:"files_changed"`
-	Tests                *ltfTests    `json:"tests"`
-	FileStates           map[string]string `json:"file_states"`
+	StartedAt         string            `json:"started_at"`
+	EndedAt           string            `json:"ended_at"`
+	TotalIterations   int               `json:"total_iterations"`
+	TotalTokens       int               `json:"total_tokens"`
+	TotalCostUSD      float64           `json:"total_cost_usd"`
+	TotalDurationMs   int64             `json:"total_duration_ms"`
+	TerminationReason string            `json:"termination_reason"`
+	Convergence       *ltfConv          `json:"convergence"`
+	FilesChanged      []string          `json:"files_changed"`
+	Tests             *ltfTests         `json:"tests"`
+	FileStates        map[string]string `json:"file_states"`
 }
 
 type ltfAgent struct {
@@ -174,6 +174,8 @@ func buildTraceFromLTF(events []ltfEvent, sourcePath string) (*trace.Trace, erro
 		t.Summary.TerminationReason = summaryEvent.TerminationReason
 		if summaryEvent.Convergence != nil {
 			t.Summary.VerifyPassRate = summaryEvent.Convergence.VerificationPassRate
+			t.Summary.IterationsToFirstSuccess = summaryEvent.Convergence.IterationsToFirstSuccess
+			t.Summary.DriftScore = summaryEvent.Convergence.DriftScore
 		}
 		if len(summaryEvent.FilesChanged) > 0 {
 			t.Summary.FilesChanged = summaryEvent.FilesChanged

internal/parser/ltf_summary_fields_test.go

@@ -0,0 +1,49 @@
+package parser
+
+import (
+	"testing"
+)
+
+func TestBuildTraceFromLTF_MapsConvergenceFields(t *testing.T) {
+	events := []ltfEvent{
+		{
+			Type:      "iteration",
+			Iteration: 1,
+			Phase:     "act",
+			LoopID:    "loop-x",
+			SessionID: "sess-x",
+		},
+		{
+			Type:              "loop_summary",
+			LoopID:            "loop-x",
+			SessionID:         "sess-x",
+			TerminationReason: "goal_met",
+			Convergence: &ltfConv{
+				IterationsToFirstSuccess: 4,
+				VerificationPassRate:     0.5,
+				DriftScore:               0.05,
+			},
+			FilesChanged: []string{"src/auth.ts"},
+		},
+	}
+
+	tr, err := buildTraceFromLTF(events, "synthetic.ltf")
+	if err != nil {
+		t.Fatalf("buildTraceFromLTF: %v", err)
+	}
+	if tr.Summary == nil {
+		t.Fatal("expected summary")
+	}
+	if tr.Summary.IterationsToFirstSuccess != 4 {
+		t.Errorf("IterationsToFirstSuccess = %d, want 4", tr.Summary.IterationsToFirstSuccess)
+	}
+	if tr.Summary.DriftScore != 0.05 {
+		t.Errorf("DriftScore = %v, want 0.05", tr.Summary.DriftScore)
+	}
+	if tr.Summary.VerifyPassRate != 0.5 {
+		t.Errorf("VerifyPassRate = %v, want 0.5", tr.Summary.VerifyPassRate)
+	}
+	if tr.Summary.TerminationReason != "goal_met" {
+		t.Errorf("TerminationReason = %q, want goal_met", tr.Summary.TerminationReason)
+	}
+}

internal/trace/types.go

@@ -70,12 +70,14 @@ func (t TokenUsage) Total() int {
 }
 
 type Summary struct {
-	TotalIterations   int
-	TotalTokens       int
-	TotalCostUSD      float64
-	TotalDurationMs   int64
-	TerminationReason string
-	FilesChanged      []string
-	ConvergenceRate   float64
-	VerifyPassRate    float64
+	TotalIterations          int
+	TotalTokens              int
+	TotalCostUSD             float64
+	TotalDurationMs          int64
+	TerminationReason        string
+	FilesChanged             []string
+	ConvergenceRate          float64
+	VerifyPassRate           float64
+	IterationsToFirstSuccess int
+	DriftScore               float64
 }