diff --git a/github/review.go b/github/review.go
index 97fa4c1..1d043e5 100644
--- a/github/review.go
+++ b/github/review.go
@@ -108,6 +108,7 @@ func (c *Client) PostReview(ctx context.Context, owner, repo string, number int,
 			} else if payload.CommitID != comment.CommitID {
 				return nil, ErrConflictingCommitIDs
 			}
+			// else: matching SHA is a no-op by design
 		}
 		payload.Comments = append(payload.Comments, reviewCommentEntry{
 			Path:     comment.Path,
diff --git a/vcs/types.go b/vcs/types.go
index dff3e8c..f77df2c 100644
--- a/vcs/types.go
+++ b/vcs/types.go
@@ -97,6 +97,7 @@ type ReviewRequest struct {
 	// CommitID anchors the review to a specific commit SHA.
 	// If empty, the platform defaults to the current PR head.
 	// Adapters use this as the primary commit anchor for the review submission.
-	CommitID string          `json:"commit_id,omitempty"`
+	CommitID string `json:"commit_id,omitempty"`
+
 	Comments []ReviewComment `json:"comments,omitempty"`
 }