diff --git a/cmd/sdrd/dsp_loop.go b/cmd/sdrd/dsp_loop.go
index 3716a6f..ac41ed0 100644
--- a/cmd/sdrd/dsp_loop.go
+++ b/cmd/sdrd/dsp_loop.go
@@ -135,12 +135,16 @@ func runDSP(ctx context.Context, srcMgr *sourceManager, cfg config.Config, det *
 				debugInfo = &SpectrumDebug{Thresholds: thresholds, NoiseFloor: noiseFloor, Scores: scoreDebug}
 				candidateSources := buildCandidateSourceSummary(state.surveillance.Candidates)
 				candidateEvidence := buildCandidateEvidenceSummary(state.surveillance.Candidates)
+				candidateEvidenceStates := buildCandidateEvidenceStateSummary(state.surveillance.Candidates)
 				if len(candidateSources) > 0 {
 					debugInfo.CandidateSources = candidateSources
 				}
 				if len(candidateEvidence) > 0 {
 					debugInfo.CandidateEvidence = candidateEvidence
 				}
+				if candidateEvidenceStates != nil {
+					debugInfo.CandidateEvidenceStates = candidateEvidenceStates
+				}
 				if hasPlan {
 					debugInfo.RefinementPlan = &plan
 				}
diff --git a/cmd/sdrd/http_handlers.go b/cmd/sdrd/http_handlers.go
index a8eac35..1964a20 100644
--- a/cmd/sdrd/http_handlers.go
+++ b/cmd/sdrd/http_handlers.go
@@ -176,6 +176,7 @@ func registerAPIHandlers(mux *http.ServeMux, cfgPath string, cfgManager *runtime
 		levelSummaries := buildSurveillanceLevelSummaries(levelSet, snap.surveillance.Spectra)
 		candidateSources := buildCandidateSourceSummary(snap.surveillance.Candidates)
 		candidateEvidence := buildCandidateEvidenceSummary(snap.surveillance.Candidates)
+		candidateEvidenceStates := buildCandidateEvidenceStateSummary(snap.surveillance.Candidates)
 		out := map[string]any{
 			"plan":                   snap.refinement.Input.Plan,
 			"windows":                snap.refinement.Input.Windows,
@@ -210,6 +211,7 @@ func registerAPIHandlers(mux *http.ServeMux, cfgPath string, cfgManager *runtime
 			"surveillance_spectra_bins":  spectraBins,
 			"candidate_sources":          candidateSources,
 			"candidate_evidence":         candidateEvidence,
+			"candidate_evidence_states":  candidateEvidenceStates,
 			"display_level":              snap.surveillance.DisplayLevel,
 			"refinement_level":           snap.refinement.Input.Level,
 			"presentation_level":         snap.presentation,
diff --git a/cmd/sdrd/level_summary.go b/cmd/sdrd/level_summary.go
index 045ea0a..17e54f6 100644
--- a/cmd/sdrd/level_summary.go
+++ b/cmd/sdrd/level_summary.go
@@ -26,6 +26,15 @@ type CandidateEvidenceSummary struct {
 	Count      int    `json:"count"`
 }
 
+type CandidateEvidenceStateSummary struct {
+	Total               int `json:"total"`
+	WithEvidence        int `json:"with_evidence"`
+	Fused               int `json:"fused"`
+	MultiLevelConfirmed int `json:"multi_level_confirmed"`
+	DerivedOnly         int `json:"derived_only"`
+	PrimaryOnly         int `json:"primary_only"`
+}
+
 func buildSurveillanceLevelSummaries(set pipeline.SurveillanceLevelSet, spectra []pipeline.SurveillanceLevelSpectrum) map[string]SurveillanceLevelSummary {
 	if set.Primary.Name == "" && len(set.Derived) == 0 && set.Presentation.Name == "" && len(set.All) == 0 {
 		return nil
@@ -133,3 +142,33 @@ func buildCandidateEvidenceSummary(candidates []pipeline.Candidate) []CandidateE
 	})
 	return out
 }
+
+func buildCandidateEvidenceStateSummary(candidates []pipeline.Candidate) *CandidateEvidenceStateSummary {
+	if len(candidates) == 0 {
+		return nil
+	}
+	summary := CandidateEvidenceStateSummary{Total: len(candidates)}
+	for _, cand := range candidates {
+		state := pipeline.CandidateEvidenceStateFor(cand)
+		if state.TotalLevelEntries == 0 {
+			continue
+		}
+		summary.WithEvidence++
+		if state.Fused {
+			summary.Fused++
+		}
+		if state.MultiLevelConfirmed {
+			summary.MultiLevelConfirmed++
+		}
+		if state.DerivedOnly {
+			summary.DerivedOnly++
+		}
+		if state.PrimaryLevelCount > 0 && state.DerivedLevelCount == 0 {
+			summary.PrimaryOnly++
+		}
+	}
+	if summary.WithEvidence == 0 {
+		return nil
+	}
+	return &summary
+}
diff --git a/cmd/sdrd/pipeline_runtime.go b/cmd/sdrd/pipeline_runtime.go
index e272acf..4b20658 100644
--- a/cmd/sdrd/pipeline_runtime.go
+++ b/cmd/sdrd/pipeline_runtime.go
@@ -476,6 +476,9 @@ func (rt *dspRuntime) detectDerivedCandidates(art *spectrumArtifacts, plan surve
 		if level.Name == "" {
 			continue
 		}
+		if !pipeline.IsDetectionLevel(level) {
+			continue
+		}
 		spectrum := spectra[level.Name]
 		if len(spectrum) == 0 {
 			continue
diff --git a/cmd/sdrd/types.go b/cmd/sdrd/types.go
index f964dfc..f02895f 100644
--- a/cmd/sdrd/types.go
+++ b/cmd/sdrd/types.go
@@ -14,15 +14,16 @@ import (
 )
 
 type SpectrumDebug struct {
-	Thresholds        []float64                  `json:"thresholds,omitempty"`
-	NoiseFloor        float64                    `json:"noise_floor,omitempty"`
-	Scores            []map[string]any           `json:"scores,omitempty"`
-	CandidateSources  map[string]int             `json:"candidate_sources,omitempty"`
-	CandidateEvidence []CandidateEvidenceSummary `json:"candidate_evidence,omitempty"`
-	RefinementPlan    *pipeline.RefinementPlan   `json:"refinement_plan,omitempty"`
-	Windows           *RefinementWindowStats     `json:"refinement_windows,omitempty"`
-	Refinement        *RefinementDebug           `json:"refinement,omitempty"`
-	Decisions         *DecisionDebug             `json:"decisions,omitempty"`
+	Thresholds              []float64                      `json:"thresholds,omitempty"`
+	NoiseFloor              float64                        `json:"noise_floor,omitempty"`
+	Scores                  []map[string]any               `json:"scores,omitempty"`
+	CandidateSources        map[string]int                 `json:"candidate_sources,omitempty"`
+	CandidateEvidence       []CandidateEvidenceSummary     `json:"candidate_evidence,omitempty"`
+	CandidateEvidenceStates *CandidateEvidenceStateSummary `json:"candidate_evidence_states,omitempty"`
+	RefinementPlan          *pipeline.RefinementPlan       `json:"refinement_plan,omitempty"`
+	Windows                 *RefinementWindowStats         `json:"refinement_windows,omitempty"`
+	Refinement              *RefinementDebug               `json:"refinement,omitempty"`
+	Decisions               *DecisionDebug                 `json:"decisions,omitempty"`
 }
 
 type RefinementWindowStats struct {