@@ -373,10 +373,11 @@ func (s service) ListTimeline(ctx context.Context, rs string, id uint64, opt *ch
						PublishedAt     githubv4.DateTime
						LastEditedAt    *githubv4.DateTime
						Editor          *githubV4Actor
						State           githubv4.PullRequestReviewState
						Body            string
						ReactionGroups  reactionGroups
						ViewerCanUpdate bool
						Comments        struct {
							Nodes []struct {
								DatabaseID       uint64
								Path             string
@@ -479,10 +480,11 @@ func (s service) ListTimeline(ctx context.Context, rs string, id uint64, opt *ch
					User:      ghActor(review.Author),
					CreatedAt: review.PublishedAt.Time,
					Edited:    edited,
					State:     state,
					Body:      review.Body,
					Reactions: ghReactions(review.ReactionGroups, ghUser(&q.Viewer)),
					Editable:  review.ViewerCanUpdate,
					Comments:  cs,
				})
			}
		}
@@ -673,10 +675,34 @@ func (s service) EditComment(ctx context.Context, rs string, id uint64, cr chang
				return change.Comment{}, err
			}
			subjectID = q.Node.IssueComment.ID
			viewerHasReacted = q.Node.IssueComment.Reactions.ViewerHasReacted
			viewer = ghUser(&q.Viewer)
		case strings.HasPrefix(cr.ID, "r"):
			reviewID := "017:PullRequestReview" + cr.ID[len("r"):]
			var q struct {
				Node struct {
					PullRequestReview struct {
						ID        githubv4.ID
						Reactions struct {
							ViewerHasReacted bool
						} `graphql:"reactions(content:$reactionContent)"`
					} `graphql:"...on PullRequestReview"`
				} `graphql:"node(id:$reviewID)"`
				Viewer githubV4User
			}
			variables := map[string]interface{}{
				"reviewID":        githubv4.ID(base64.StdEncoding.EncodeToString([]byte(reviewID))), // HACK, TODO: Confirm StdEncoding vs URLEncoding.
				"reactionContent": reactionContent,
			}
			err = s.clV4.Query(ctx, &q, variables)
			if err != nil {
				return change.Comment{}, err
			}
			subjectID = q.Node.PullRequestReview.ID
			viewerHasReacted = q.Node.PullRequestReview.Reactions.ViewerHasReacted
			viewer = ghUser(&q.Viewer)
		case strings.HasPrefix(cr.ID, "rc"):
			commentID := "024:PullRequestReviewComment" + cr.ID[len("rc"):]
			var q struct {
				Node struct {
					PullRequestReviewComment struct {