I think it makes sense to expose when a literal match is found. This …

…might also help prevent false positives

server/http.go

@@ -40,6 +40,7 @@ type tySugRequest struct {
 type tySugResponse struct {
 	Result string  `json:"result"`
 	Score  float64 `json:"score"`
+	Exact  bool    `json:"exact_match"`
 }
 
 type pprofConfig struct {
@@ -183,7 +184,7 @@ func createRequestHandler(logger *logrus.Logger, svc Service, validators []Valid
 		var res tySugResponse
 
 		start := time.Now()
-		res.Result, res.Score = svc.Find(ctx, req.Input)
+		res.Result, res.Score, res.Exact = svc.Find(ctx, req.Input)
 
 		ctxLogger.WithFields(logrus.Fields{
 			"input":       req.Input,

server/service.go

@@ -4,5 +4,5 @@ import "context"
 
 // Service is the type any service must implement
 type Service interface {
-	Find(ctx context.Context, input string) (string, float64)
+	Find(ctx context.Context, input string) (string, float64, bool)
 }

server/service/domain.go

@@ -33,9 +33,9 @@ type Service struct {
 }
 
 // Find returns the nearest reference
-func (s Service) Find(ctx context.Context, input string) (string, float64) {
-	suggestion, score, _ := s.finder.FindCtx(ctx, input)
-	return suggestion, score
+func (s Service) Find(ctx context.Context, input string) (string, float64, bool) {
+	suggestion, score, exact := s.finder.FindCtx(ctx, input)
+	return suggestion, score, exact
 }
 
 func algJaroWinkler() finder.Algorithm {

server/service_registry_test.go

@@ -8,8 +8,8 @@ import (
 type stubSvc struct {
 }
 
-func (stubSvc) Find(ctx context.Context, input string) (string, float64) {
-	return "", 0
+func (stubSvc) Find(ctx context.Context, input string) (string, float64, bool) {
+	return "", 0, true
 }
 
 func TestHasServiceForList(t *testing.T) {