diff --git a/internal/database/album_event_repository.go b/internal/database/album_event_repository.go
new file mode 100644
index 0000000..1322807
--- /dev/null
+++ b/internal/database/album_event_repository.go
@@ -0,0 +1,116 @@
+package database
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"github.com/jackc/pgx/v5/pgxpool"
+)
+
+type AlbumEvent struct {
+	ID            string
+	Seq           int64
+	WorkflowRunID string
+	AlbumID       string
+	EventType     string
+	Step          string
+	Message       string
+	DataJSON      []byte
+	CreatedAt     time.Time
+}
+
+type AlbumEventRepository struct {
+	pool *pgxpool.Pool
+}
+
+func NewAlbumEventRepository(pool *pgxpool.Pool) *AlbumEventRepository {
+	return &AlbumEventRepository{pool: pool}
+}
+
+func (r *AlbumEventRepository) Create(ctx context.Context, event *AlbumEvent) error {
+	err := r.pool.QueryRow(ctx,
+		`INSERT INTO album_events (workflow_run_id, album_id, event_type, step, message, data_json)
+		 VALUES ($1, $2, $3, $4, $5, $6)
+		 RETURNING id, seq, created_at`,
+		event.WorkflowRunID, event.AlbumID, event.EventType, event.Step, event.Message, event.DataJSON,
+	).Scan(&event.ID, &event.Seq, &event.CreatedAt)
+	if err != nil {
+		return fmt.Errorf("creating album event: %w", err)
+	}
+	return nil
+}
+
+func (r *AlbumEventRepository) GetByWorkflowRun(ctx context.Context, workflowRunID string) ([]*AlbumEvent, error) {
+	rows, err := r.pool.Query(ctx,
+		`SELECT id, seq, workflow_run_id, album_id, event_type, step, message, data_json, created_at
+		 FROM album_events WHERE workflow_run_id = $1 ORDER BY seq`, workflowRunID,
+	)
+	if err != nil {
+		return nil, fmt.Errorf("listing album events by workflow run: %w", err)
+	}
+	defer rows.Close()
+
+	var events []*AlbumEvent
+	for rows.Next() {
+		event := &AlbumEvent{}
+		if err := rows.Scan(&event.ID, &event.Seq, &event.WorkflowRunID, &event.AlbumID, &event.EventType, &event.Step, &event.Message, &event.DataJSON, &event.CreatedAt); err != nil {
+			return nil, fmt.Errorf("scanning album event: %w", err)
+		}
+		events = append(events, event)
+	}
+	return events, nil
+}
+
+func (r *AlbumEventRepository) GetByAlbum(ctx context.Context, albumID string, afterSeq int64, limit int) ([]*AlbumEvent, error) {
+	rows, err := r.pool.Query(ctx,
+		`SELECT id, seq, workflow_run_id, album_id, event_type, step, message, data_json, created_at
+		 FROM album_events WHERE album_id = $1 AND seq > $2 ORDER BY seq LIMIT $3`, albumID, afterSeq, limit,
+	)
+	if err != nil {
+		return nil, fmt.Errorf("listing album events by album: %w", err)
+	}
+	defer rows.Close()
+
+	var events []*AlbumEvent
+	for rows.Next() {
+		event := &AlbumEvent{}
+		if err := rows.Scan(&event.ID, &event.Seq, &event.WorkflowRunID, &event.AlbumID, &event.EventType, &event.Step, &event.Message, &event.DataJSON, &event.CreatedAt); err != nil {
+			return nil, fmt.Errorf("scanning album event: %w", err)
+		}
+		events = append(events, event)
+	}
+	return events, nil
+}
+
+func (r *AlbumEventRepository) GetLatestSeq(ctx context.Context) (int64, error) {
+	var seq int64
+	err := r.pool.QueryRow(ctx,
+		`SELECT COALESCE(MAX(seq), 0) FROM album_events`,
+	).Scan(&seq)
+	if err != nil {
+		return 0, fmt.Errorf("getting latest album event seq: %w", err)
+	}
+	return seq, nil
+}
+
+func (r *AlbumEventRepository) GetAfterSeq(ctx context.Context, afterSeq int64) ([]*AlbumEvent, error) {
+	rows, err := r.pool.Query(ctx,
+		`SELECT id, seq, workflow_run_id, album_id, event_type, step, message, data_json, created_at
+		 FROM album_events WHERE seq > $1 ORDER BY seq LIMIT 1000`, afterSeq,
+	)
+	if err != nil {
+		return nil, fmt.Errorf("listing album events after seq: %w", err)
+	}
+	defer rows.Close()
+
+	var events []*AlbumEvent
+	for rows.Next() {
+		event := &AlbumEvent{}
+		if err := rows.Scan(&event.ID, &event.Seq, &event.WorkflowRunID, &event.AlbumID, &event.EventType, &event.Step, &event.Message, &event.DataJSON, &event.CreatedAt); err != nil {
+			return nil, fmt.Errorf("scanning album event: %w", err)
+		}
+		events = append(events, event)
+	}
+	return events, nil
+}
diff --git a/internal/database/download_repository.go b/internal/database/download_repository.go
index 528e5ed..cc2bdaa 100644
--- a/internal/database/download_repository.go
+++ b/internal/database/download_repository.go
@@ -86,6 +86,26 @@ func (r *DownloadRepository) SetFailed(ctx context.Context, id string, errorMsg
 	return nil
 }
 
+func (r *DownloadRepository) SetCancelled(ctx context.Context, id string) error {
+	_, err := r.pool.Exec(ctx,
+		`UPDATE downloads SET state = 'cancelled', updated_at = NOW() WHERE id = $1`, id,
+	)
+	if err != nil {
+		return fmt.Errorf("setting download cancelled: %w", err)
+	}
+	return nil
+}
+
+func (r *DownloadRepository) SetCancelledByQbitHash(ctx context.Context, hash string) error {
+	_, err := r.pool.Exec(ctx,
+		`UPDATE downloads SET state = 'cancelled', updated_at = NOW() WHERE qbit_hash = $1 AND state NOT IN ('completed', 'failed', 'cancelled')`, hash,
+	)
+	if err != nil {
+		return fmt.Errorf("setting download cancelled by hash: %w", err)
+	}
+	return nil
+}
+
 func (r *DownloadRepository) GetByAlbumID(ctx context.Context, albumID string) ([]*Download, error) {
 	rows, err := r.pool.Query(ctx,
 		`SELECT id, torrent_id, album_id, format, quality, state, qbit_hash, save_path, error_message, queued_at, started_at, completed_at, created_at, updated_at
diff --git a/internal/database/workflow_run_repository.go b/internal/database/workflow_run_repository.go
new file mode 100644
index 0000000..286b619
--- /dev/null
+++ b/internal/database/workflow_run_repository.go
@@ -0,0 +1,123 @@
+package database
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"github.com/jackc/pgx/v5"
+	"github.com/jackc/pgx/v5/pgxpool"
+)
+
+var ErrWorkflowAlreadyRunning = fmt.Errorf("workflow already running for this album and quality")
+
+type WorkflowRun struct {
+	ID           string
+	AlbumID      string
+	Quality      string
+	Status       string
+	ErrorMessage *string
+	StartedAt    time.Time
+	CompletedAt  *time.Time
+	CreatedAt    time.Time
+	UpdatedAt    time.Time
+}
+
+type WorkflowRunRepository struct {
+	pool *pgxpool.Pool
+}
+
+func NewWorkflowRunRepository(pool *pgxpool.Pool) *WorkflowRunRepository {
+	return &WorkflowRunRepository{pool: pool}
+}
+
+func (r *WorkflowRunRepository) Create(ctx context.Context, run *WorkflowRun) error {
+	err := r.pool.QueryRow(ctx,
+		`INSERT INTO workflow_runs (album_id, quality, status) VALUES ($1, $2, 'running')
+		 ON CONFLICT ON CONSTRAINT idx_workflow_runs_active DO NOTHING
+		 RETURNING id, started_at, created_at, updated_at`,
+		run.AlbumID, run.Quality,
+	).Scan(&run.ID, &run.StartedAt, &run.CreatedAt, &run.UpdatedAt)
+	if err != nil {
+		if err == pgx.ErrNoRows {
+			return ErrWorkflowAlreadyRunning
+		}
+		return fmt.Errorf("creating workflow run: %w", err)
+	}
+	return nil
+}
+
+func (r *WorkflowRunRepository) SetCompleted(ctx context.Context, id string) error {
+	_, err := r.pool.Exec(ctx,
+		`UPDATE workflow_runs SET status = 'completed', completed_at = NOW(), updated_at = NOW() WHERE id = $1`, id,
+	)
+	if err != nil {
+		return fmt.Errorf("setting workflow run completed: %w", err)
+	}
+	return nil
+}
+
+func (r *WorkflowRunRepository) SetFailed(ctx context.Context, id string, errorMsg string) error {
+	_, err := r.pool.Exec(ctx,
+		`UPDATE workflow_runs SET status = 'failed', error_message = $1, completed_at = NOW(), updated_at = NOW() WHERE id = $2`, errorMsg, id,
+	)
+	if err != nil {
+		return fmt.Errorf("setting workflow run failed: %w", err)
+	}
+	return nil
+}
+
+func (r *WorkflowRunRepository) SetCancelled(ctx context.Context, id string) error {
+	_, err := r.pool.Exec(ctx,
+		`UPDATE workflow_runs SET status = 'cancelled', completed_at = NOW(), updated_at = NOW() WHERE id = $1`, id,
+	)
+	if err != nil {
+		return fmt.Errorf("setting workflow run cancelled: %w", err)
+	}
+	return nil
+}
+
+func (r *WorkflowRunRepository) GetByAlbumAndQuality(ctx context.Context, albumID string, quality string) (*WorkflowRun, error) {
+	run := &WorkflowRun{}
+	err := r.pool.QueryRow(ctx,
+		`SELECT id, album_id, quality, status, error_message, started_at, completed_at, created_at, updated_at
+		 FROM workflow_runs WHERE album_id = $1 AND quality = $2 AND status = 'running' LIMIT 1`, albumID, quality,
+	).Scan(&run.ID, &run.AlbumID, &run.Quality, &run.Status, &run.ErrorMessage, &run.StartedAt, &run.CompletedAt, &run.CreatedAt, &run.UpdatedAt)
+	if err != nil {
+		return nil, fmt.Errorf("getting workflow run by album and quality: %w", err)
+	}
+	return run, nil
+}
+
+func (r *WorkflowRunRepository) GetRunning(ctx context.Context) ([]*WorkflowRun, error) {
+	rows, err := r.pool.Query(ctx,
+		`SELECT id, album_id, quality, status, error_message, started_at, completed_at, created_at, updated_at
+		 FROM workflow_runs WHERE status = 'running' ORDER BY started_at`,
+	)
+	if err != nil {
+		return nil, fmt.Errorf("listing running workflow runs: %w", err)
+	}
+	defer rows.Close()
+
+	var runs []*WorkflowRun
+	for rows.Next() {
+		run := &WorkflowRun{}
+		if err := rows.Scan(&run.ID, &run.AlbumID, &run.Quality, &run.Status, &run.ErrorMessage, &run.StartedAt, &run.CompletedAt, &run.CreatedAt, &run.UpdatedAt); err != nil {
+			return nil, fmt.Errorf("scanning workflow run: %w", err)
+		}
+		runs = append(runs, run)
+	}
+	return runs, nil
+}
+
+func (r *WorkflowRunRepository) GetByID(ctx context.Context, id string) (*WorkflowRun, error) {
+	run := &WorkflowRun{}
+	err := r.pool.QueryRow(ctx,
+		`SELECT id, album_id, quality, status, error_message, started_at, completed_at, created_at, updated_at
+		 FROM workflow_runs WHERE id = $1`, id,
+	).Scan(&run.ID, &run.AlbumID, &run.Quality, &run.Status, &run.ErrorMessage, &run.StartedAt, &run.CompletedAt, &run.CreatedAt, &run.UpdatedAt)
+	if err != nil {
+		return nil, fmt.Errorf("getting workflow run by id: %w", err)
+	}
+	return run, nil
+}