feat: Add external_ref field for linking to external issue trackers

Add nullable external_ref TEXT field to link bd issues with external
systems like GitHub Issues, Jira, etc. Includes automatic schema
migration for backward compatibility.

Changes:
- Added external_ref column to issues table with feature-based migration
- Updated Issue struct with ExternalRef *string field
- Added --external-ref flag to bd create and bd update commands
- Updated all SQL queries across the codebase to include external_ref:
  - GetIssue, CreateIssue, UpdateIssue, SearchIssues
  - GetDependencies, GetDependents, GetDependencyTree
  - GetReadyWork, GetBlockedIssues, GetIssuesByLabel
- Added external_ref handling in import/export logic
- Follows existing patterns for nullable fields (sql.NullString)

This enables tracking relationships between bd issues and external
systems without requiring changes to existing databases or JSONL files.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

cmd/bd/import.go

@@ -222,6 +222,13 @@ Behavior:
 						updates["estimated_minutes"] = nil
 					}
 				}
+				if _, ok := rawData["external_ref"]; ok {
+					if issue.ExternalRef != nil {
+						updates["external_ref"] = *issue.ExternalRef
+					} else {
+						updates["external_ref"] = nil
+					}
+				}
 
 				if err := store.UpdateIssue(ctx, issue.ID, updates, "import"); err != nil {
 					fmt.Fprintf(os.Stderr, "Error updating issue %s: %v\n", issue.ID, err)

cmd/bd/main.go

@@ -238,6 +238,9 @@ func autoImportIfNewer() {
 			if issue.EstimatedMinutes != nil {
 				updates["estimated_minutes"] = *issue.EstimatedMinutes
 			}
+			if issue.ExternalRef != nil {
+				updates["external_ref"] = *issue.ExternalRef
+			}
 
 			_ = store.UpdateIssue(ctx, issue.ID, updates, "auto-import")
 		} else {
@@ -512,6 +515,7 @@ var createCmd = &cobra.Command{
 		assignee, _ := cmd.Flags().GetString("assignee")
 		labels, _ := cmd.Flags().GetStringSlice("labels")
 		explicitID, _ := cmd.Flags().GetString("id")
+		externalRef, _ := cmd.Flags().GetString("external-ref")
 
 		// Validate explicit ID format if provided (prefix-number)
 		if explicitID != "" {
@@ -528,6 +532,11 @@ var createCmd = &cobra.Command{
 			}
 		}
 
+		var externalRefPtr *string
+		if externalRef != "" {
+			externalRefPtr = &externalRef
+		}
+
 		issue := &types.Issue{
 			ID:                 explicitID, // Set explicit ID if provided (empty string if not)
 			Title:              title,
@@ -538,6 +547,7 @@ var createCmd = &cobra.Command{
 			Priority:           priority,
 			IssueType:          types.IssueType(issueType),
 			Assignee:           assignee,
+			ExternalRef:        externalRefPtr,
 		}
 
 		ctx := context.Background()
@@ -577,6 +587,7 @@ func init() {
 	createCmd.Flags().StringP("assignee", "a", "", "Assignee")
 	createCmd.Flags().StringSliceP("labels", "l", []string{}, "Labels (comma-separated)")
 	createCmd.Flags().String("id", "", "Explicit issue ID (e.g., 'bd-42' for partitioning)")
+	createCmd.Flags().String("external-ref", "", "External reference (e.g., 'gh-9', 'jira-ABC')")
 	rootCmd.AddCommand(createCmd)
 }
 
@@ -768,6 +779,10 @@ var updateCmd = &cobra.Command{
 			acceptanceCriteria, _ := cmd.Flags().GetString("acceptance-criteria")
 			updates["acceptance_criteria"] = acceptanceCriteria
 		}
+		if cmd.Flags().Changed("external-ref") {
+			externalRef, _ := cmd.Flags().GetString("external-ref")
+			updates["external_ref"] = externalRef
+		}
 
 		if len(updates) == 0 {
 			fmt.Println("No updates specified")
@@ -802,6 +817,7 @@ func init() {
 	updateCmd.Flags().String("design", "", "Design notes")
 	updateCmd.Flags().String("notes", "", "Additional notes")
 	updateCmd.Flags().String("acceptance-criteria", "", "Acceptance criteria")
+	updateCmd.Flags().String("external-ref", "", "External reference (e.g., 'gh-9', 'jira-ABC')")
 	rootCmd.AddCommand(updateCmd)
 }
 

internal/storage/sqlite/dependencies.go

@@ -156,7 +156,7 @@ func (s *SQLiteStorage) GetDependencies(ctx context.Context, issueID string) ([]
 	rows, err := s.db.QueryContext(ctx, `
 		SELECT i.id, i.title, i.description, i.design, i.acceptance_criteria, i.notes,
 		       i.status, i.priority, i.issue_type, i.assignee, i.estimated_minutes,
-		       i.created_at, i.updated_at, i.closed_at
+		       i.created_at, i.updated_at, i.closed_at, i.external_ref
 		FROM issues i
 		JOIN dependencies d ON i.id = d.depends_on_id
 		WHERE d.issue_id = ?
@@ -175,7 +175,7 @@ func (s *SQLiteStorage) GetDependents(ctx context.Context, issueID string) ([]*t
 	rows, err := s.db.QueryContext(ctx, `
 		SELECT i.id, i.title, i.description, i.design, i.acceptance_criteria, i.notes,
 		       i.status, i.priority, i.issue_type, i.assignee, i.estimated_minutes,
-		       i.created_at, i.updated_at, i.closed_at
+		       i.created_at, i.updated_at, i.closed_at, i.external_ref
 		FROM issues i
 		JOIN dependencies d ON i.id = d.issue_id
 		WHERE d.depends_on_id = ?
@@ -267,6 +267,7 @@ func (s *SQLiteStorage) GetDependencyTree(ctx context.Context, issueID string, m
 				i.id, i.title, i.status, i.priority, i.description, i.design,
 				i.acceptance_criteria, i.notes, i.issue_type, i.assignee,
 				i.estimated_minutes, i.created_at, i.updated_at, i.closed_at,
+				i.external_ref,
 				0 as depth
 			FROM issues i
 			WHERE i.id = ?
@@ -277,6 +278,7 @@ func (s *SQLiteStorage) GetDependencyTree(ctx context.Context, issueID string, m
 				i.id, i.title, i.status, i.priority, i.description, i.design,
 				i.acceptance_criteria, i.notes, i.issue_type, i.assignee,
 				i.estimated_minutes, i.created_at, i.updated_at, i.closed_at,
+				i.external_ref,
 				t.depth + 1
 			FROM issues i
 			JOIN dependencies d ON i.id = d.depends_on_id
@@ -297,12 +299,13 @@ func (s *SQLiteStorage) GetDependencyTree(ctx context.Context, issueID string, m
 		var closedAt sql.NullTime
 		var estimatedMinutes sql.NullInt64
 		var assignee sql.NullString
+		var externalRef sql.NullString
 
 		err := rows.Scan(
 			&node.ID, &node.Title, &node.Status, &node.Priority,
 			&node.Description, &node.Design, &node.AcceptanceCriteria,
 			&node.Notes, &node.IssueType, &assignee, &estimatedMinutes,
-			&node.CreatedAt, &node.UpdatedAt, &closedAt, &node.Depth,
+			&node.CreatedAt, &node.UpdatedAt, &closedAt, &externalRef, &node.Depth,
 		)
 		if err != nil {
 			return nil, fmt.Errorf("failed to scan tree node: %w", err)
@@ -318,6 +321,9 @@ func (s *SQLiteStorage) GetDependencyTree(ctx context.Context, issueID string, m
 		if assignee.Valid {
 			node.Assignee = assignee.String
 		}
+		if externalRef.Valid {
+			node.ExternalRef = &externalRef.String
+		}
 
 		node.Truncated = node.Depth == maxDepth
 
@@ -415,12 +421,13 @@ func scanIssues(rows *sql.Rows) ([]*types.Issue, error) {
 		var closedAt sql.NullTime
 		var estimatedMinutes sql.NullInt64
 		var assignee sql.NullString
+		var externalRef sql.NullString
 
 		err := rows.Scan(
 			&issue.ID, &issue.Title, &issue.Description, &issue.Design,
 			&issue.AcceptanceCriteria, &issue.Notes, &issue.Status,
 			&issue.Priority, &issue.IssueType, &assignee, &estimatedMinutes,
-			&issue.CreatedAt, &issue.UpdatedAt, &closedAt,
+			&issue.CreatedAt, &issue.UpdatedAt, &closedAt, &externalRef,
 		)
 		if err != nil {
 			return nil, fmt.Errorf("failed to scan issue: %w", err)
@@ -436,6 +443,9 @@ func scanIssues(rows *sql.Rows) ([]*types.Issue, error) {
 		if assignee.Valid {
 			issue.Assignee = assignee.String
 		}
+		if externalRef.Valid {
+			issue.ExternalRef = &externalRef.String
+		}
 
 		issues = append(issues, &issue)
 	}

internal/storage/sqlite/labels.go

@@ -108,7 +108,7 @@ func (s *SQLiteStorage) GetIssuesByLabel(ctx context.Context, label string) ([]*
 	rows, err := s.db.QueryContext(ctx, `
 		SELECT i.id, i.title, i.description, i.design, i.acceptance_criteria, i.notes,
 		       i.status, i.priority, i.issue_type, i.assignee, i.estimated_minutes,
-		       i.created_at, i.updated_at, i.closed_at
+		       i.created_at, i.updated_at, i.closed_at, i.external_ref
 		FROM issues i
 		JOIN labels l ON i.id = l.issue_id
 		WHERE l.label = ?

internal/storage/sqlite/ready.go

@@ -46,7 +46,7 @@ func (s *SQLiteStorage) GetReadyWork(ctx context.Context, filter types.WorkFilte
 	query := fmt.Sprintf(`
 		SELECT i.id, i.title, i.description, i.design, i.acceptance_criteria, i.notes,
 		       i.status, i.priority, i.issue_type, i.assignee, i.estimated_minutes,
-		       i.created_at, i.updated_at, i.closed_at
+		       i.created_at, i.updated_at, i.closed_at, i.external_ref
 		FROM issues i
 		WHERE %s
 		  AND NOT EXISTS (
@@ -76,7 +76,7 @@ func (s *SQLiteStorage) GetBlockedIssues(ctx context.Context) ([]*types.BlockedI
 		SELECT
 		    i.id, i.title, i.description, i.design, i.acceptance_criteria, i.notes,
 		    i.status, i.priority, i.issue_type, i.assignee, i.estimated_minutes,
-		    i.created_at, i.updated_at, i.closed_at,
+		    i.created_at, i.updated_at, i.closed_at, i.external_ref,
 		    COUNT(d.depends_on_id) as blocked_by_count,
 		    GROUP_CONCAT(d.depends_on_id, ',') as blocker_ids
 		FROM issues i
@@ -99,13 +99,14 @@ func (s *SQLiteStorage) GetBlockedIssues(ctx context.Context) ([]*types.BlockedI
 		var closedAt sql.NullTime
 		var estimatedMinutes sql.NullInt64
 		var assignee sql.NullString
+		var externalRef sql.NullString
 		var blockerIDsStr string
 
 		err := rows.Scan(
 			&issue.ID, &issue.Title, &issue.Description, &issue.Design,
 			&issue.AcceptanceCriteria, &issue.Notes, &issue.Status,
 			&issue.Priority, &issue.IssueType, &assignee, &estimatedMinutes,
-			&issue.CreatedAt, &issue.UpdatedAt, &closedAt, &issue.BlockedByCount,
+			&issue.CreatedAt, &issue.UpdatedAt, &closedAt, &externalRef, &issue.BlockedByCount,
 			&blockerIDsStr,
 		)
 		if err != nil {
@@ -122,6 +123,9 @@ func (s *SQLiteStorage) GetBlockedIssues(ctx context.Context) ([]*types.BlockedI
 		if assignee.Valid {
 			issue.Assignee = assignee.String
 		}
+		if externalRef.Valid {
+			issue.ExternalRef = &externalRef.String
+		}
 
 		// Parse comma-separated blocker IDs
 		if blockerIDsStr != "" {

internal/storage/sqlite/schema.go

@@ -16,7 +16,8 @@ CREATE TABLE IF NOT EXISTS issues (
     estimated_minutes INTEGER,
     created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
     updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
-    closed_at DATETIME
+    closed_at DATETIME,
+    external_ref TEXT
 );
 
 CREATE INDEX IF NOT EXISTS idx_issues_status ON issues(status);

internal/storage/sqlite/sqlite.go

@@ -55,6 +55,11 @@ func New(path string) (*SQLiteStorage, error) {
 		return nil, fmt.Errorf("failed to migrate issue_counters table: %w", err)
 	}
 
+	// Migrate existing databases to add external_ref column if missing
+	if err := migrateExternalRefColumn(db); err != nil {
+		return nil, fmt.Errorf("failed to migrate external_ref column: %w", err)
+	}
+
 	return &SQLiteStorage{
 		db: db,
 	}, nil
@@ -155,6 +160,47 @@ func migrateIssueCountersTable(db *sql.DB) error {
 	return nil
 }
 
+// migrateExternalRefColumn checks if the external_ref column exists and adds it if missing.
+// This ensures existing databases created before the external reference feature get migrated automatically.
+func migrateExternalRefColumn(db *sql.DB) error {
+	// Check if external_ref column exists
+	var columnExists bool
+	rows, err := db.Query("PRAGMA table_info(issues)")
+	if err != nil {
+		return fmt.Errorf("failed to check schema: %w", err)
+	}
+	defer rows.Close()
+
+	for rows.Next() {
+		var cid int
+		var name, typ string
+		var notnull, pk int
+		var dflt *string
+		err := rows.Scan(&cid, &name, &typ, &notnull, &dflt, &pk)
+		if err != nil {
+			return fmt.Errorf("failed to scan column info: %w", err)
+		}
+		if name == "external_ref" {
+			columnExists = true
+			break
+		}
+	}
+
+	if err := rows.Err(); err != nil {
+		return fmt.Errorf("error reading column info: %w", err)
+	}
+
+	if !columnExists {
+		// Add external_ref column
+		_, err := db.Exec(`ALTER TABLE issues ADD COLUMN external_ref TEXT`)
+		if err != nil {
+			return fmt.Errorf("failed to add external_ref column: %w", err)
+		}
+	}
+
+	return nil
+}
+
 // getNextIDForPrefix atomically generates the next ID for a given prefix
 // Uses the issue_counters table for atomic, cross-process ID generation
 func (s *SQLiteStorage) getNextIDForPrefix(ctx context.Context, prefix string) (int, error) {
@@ -277,13 +323,14 @@ func (s *SQLiteStorage) CreateIssue(ctx context.Context, issue *types.Issue, act
 		INSERT INTO issues (
 			id, title, description, design, acceptance_criteria, notes,
 			status, priority, issue_type, assignee, estimated_minutes,
-			created_at, updated_at
+			created_at, updated_at, external_ref
-		) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+		) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
 	`,
 		issue.ID, issue.Title, issue.Description, issue.Design,
 		issue.AcceptanceCriteria, issue.Notes, issue.Status,
 		issue.Priority, issue.IssueType, issue.Assignee,
 		issue.EstimatedMinutes, issue.CreatedAt, issue.UpdatedAt,
+		issue.ExternalRef,
 	)
 	if err != nil {
 		return fmt.Errorf("failed to insert issue: %w", err)
@@ -323,18 +370,19 @@ func (s *SQLiteStorage) GetIssue(ctx context.Context, id string) (*types.Issue,
 	var closedAt sql.NullTime
 	var estimatedMinutes sql.NullInt64
 	var assignee sql.NullString
+	var externalRef sql.NullString
 
 	err := s.db.QueryRowContext(ctx, `
 		SELECT id, title, description, design, acceptance_criteria, notes,
 		       status, priority, issue_type, assignee, estimated_minutes,
-		       created_at, updated_at, closed_at
+		       created_at, updated_at, closed_at, external_ref
 		FROM issues
 		WHERE id = ?
 	`, id).Scan(
 		&issue.ID, &issue.Title, &issue.Description, &issue.Design,
 		&issue.AcceptanceCriteria, &issue.Notes, &issue.Status,
 		&issue.Priority, &issue.IssueType, &assignee, &estimatedMinutes,
-		&issue.CreatedAt, &issue.UpdatedAt, &closedAt,
+		&issue.CreatedAt, &issue.UpdatedAt, &closedAt, &externalRef,
 	)
 
 	if err == sql.ErrNoRows {
@@ -354,6 +402,9 @@ func (s *SQLiteStorage) GetIssue(ctx context.Context, id string) (*types.Issue,
 	if assignee.Valid {
 		issue.Assignee = assignee.String
 	}
+	if externalRef.Valid {
+		issue.ExternalRef = &externalRef.String
+	}
 
 	return &issue, nil
 }
@@ -370,6 +421,7 @@ var allowedUpdateFields = map[string]bool{
 	"notes":               true,
 	"issue_type":          true,
 	"estimated_minutes":   true,
+	"external_ref":        true,
 }
 
 // UpdateIssue updates fields on an issue
@@ -575,7 +627,7 @@ func (s *SQLiteStorage) SearchIssues(ctx context.Context, query string, filter t
 	querySQL := fmt.Sprintf(`
 		SELECT id, title, description, design, acceptance_criteria, notes,
 		       status, priority, issue_type, assignee, estimated_minutes,
-		       created_at, updated_at, closed_at
+		       created_at, updated_at, closed_at, external_ref
 		FROM issues
 		%s
 		ORDER BY priority ASC, created_at DESC

internal/types/types.go

@@ -22,6 +22,7 @@ type Issue struct {
 	CreatedAt          time.Time      `json:"created_at"`
 	UpdatedAt          time.Time      `json:"updated_at"`
 	ClosedAt           *time.Time     `json:"closed_at,omitempty"`
+	ExternalRef        *string        `json:"external_ref,omitempty"` // e.g., "gh-9", "jira-ABC"
 	Dependencies       []*Dependency  `json:"dependencies,omitempty"` // Populated only for export/import
 }