diff --git a/internal/types/types.go b/internal/types/types.go
index dd45091e..93d9597d 100644
--- a/internal/types/types.go
+++ b/internal/types/types.go
@@ -10,7 +10,7 @@ import (
 // Issue represents a trackable work item
 type Issue struct {
 	ID                 string         `json:"id"`
-	ContentHash        string         `json:"content_hash,omitempty"` // SHA256 hash of canonical content (excludes ID, timestamps)
+	ContentHash        string         `json:"-"` // Internal: SHA256 hash of canonical content (excludes ID, timestamps) - NOT exported to JSONL
 	Title              string         `json:"title"`
 	Description        string         `json:"description"`
 	Design             string         `json:"design,omitempty"`
@@ -29,7 +29,7 @@ type Issue struct {
 	CompactedAt        *time.Time     `json:"compacted_at,omitempty"`
 	CompactedAtCommit  *string        `json:"compacted_at_commit,omitempty"` // Git commit hash when compacted
 	OriginalSize       int            `json:"original_size,omitempty"`
-	SourceRepo         string         `json:"source_repo,omitempty"` // Which repo owns this issue (multi-repo support)
+	SourceRepo         string         `json:"-"` // Internal: Which repo owns this issue (multi-repo support) - NOT exported to JSONL
 	Labels             []string       `json:"labels,omitempty"` // Populated only for export/import
 	Dependencies       []*Dependency  `json:"dependencies,omitempty"` // Populated only for export/import
 	Comments           []*Comment     `json:"comments,omitempty"`     // Populated only for export/import