diff --git a/ingestion/internal/pipeline/pipeline_test.go b/ingestion/internal/pipeline/pipeline_test.go
index 38976b8..ac39b3d 100644
--- a/ingestion/internal/pipeline/pipeline_test.go
+++ b/ingestion/internal/pipeline/pipeline_test.go
@@ -125,6 +125,9 @@ func TestRun_MergesDuplicatePaths(t *testing.T) {
 }
 
 func mustJSON(v any) string {
-	b, _ := json.Marshal(v)
+	b, err := json.Marshal(v)
+	if err != nil {
+		panic(err)
+	}
 	return string(b)
 }
diff --git a/ingestion/internal/wiki/inventory.go b/ingestion/internal/wiki/inventory.go
index 42398d6..43a4ad1 100644
--- a/ingestion/internal/wiki/inventory.go
+++ b/ingestion/internal/wiki/inventory.go
@@ -3,6 +3,7 @@ package wiki
 
 import (
 	"bufio"
+	"fmt"
 	"os"
 	"path/filepath"
 	"strings"
@@ -23,7 +24,7 @@ func LoadInventory(brainDir string) (map[PageType][]Entry, error) {
 			continue
 		}
 		if err != nil {
-			return nil, err
+			return nil, fmt.Errorf("read dir %s: %w", dir, err)
 		}
 		for _, e := range entries {
 			if e.IsDir() || !strings.HasSuffix(e.Name(), ".md") {
diff --git a/ingestion/internal/wiki/log.go b/ingestion/internal/wiki/log.go
index 283d3b8..ade924c 100644
--- a/ingestion/internal/wiki/log.go
+++ b/ingestion/internal/wiki/log.go
@@ -33,6 +33,8 @@ func AppendLog(brainDir, source string, pages, warnings []string, date string) e
 		return fmt.Errorf("open log: %w", err)
 	}
 	defer f.Close()
-	_, err = f.WriteString(sb.String())
-	return err
+	if _, err = f.WriteString(sb.String()); err != nil {
+		return fmt.Errorf("write log: %w", err)
+	}
+	return nil
 }