/{cmd,docs,internal}: support import export for dolt backends

cmd/bd/doctor/database.go

@@ -510,7 +510,7 @@ func CheckDatabaseIntegrity(path string) DoctorCheck {
 func CheckDatabaseJSONLSync(path string) DoctorCheck {
 	backend, beadsDir := getBackendAndBeadsDir(path)
 
-	// Dolt backend: JSONL is a derived compatibility artifact (export-only today).
+	// Dolt backend: JSONL is an optional compatibility artifact.
 	// The SQLite-style import/export divergence checks don't apply.
 	if backend == configfile.BackendDolt {
 		// Find JSONL file (respects metadata.json override when set).
@@ -545,7 +545,7 @@ func CheckDatabaseJSONLSync(path string) DoctorCheck {
 			Name:    "DB-JSONL Sync",
 			Status:  StatusOK,
 			Message: "N/A (dolt backend)",
-			Detail:  "JSONL is derived from Dolt (export-only); import-only sync checks do not apply",
+			Detail:  "Dolt sync is database-native; JSONL divergence checks do not apply (manual JSONL import/export is supported).",
 		}
 	}
 

cmd/bd/doctor/fix/e2e_test.go

@@ -780,14 +780,20 @@ func TestMergeDriverWithLockedConfig_E2E(t *testing.T) {
 
 		dir := setupTestGitRepo(t)
 
+		gitDir := filepath.Join(dir, ".git")
 		gitConfigPath := filepath.Join(dir, ".git", "config")
 
-		// Make git config read-only
-		if err := os.Chmod(gitConfigPath, 0444); err != nil {
+		// Make both .git directory and config file read-only to truly prevent writes.
+		// Git may otherwise write via lockfile+rename even if the config file itself is read-only.
+		if err := os.Chmod(gitConfigPath, 0400); err != nil {
 			t.Fatalf("failed to make config read-only: %v", err)
 		}
+		if err := os.Chmod(gitDir, 0500); err != nil {
+			t.Fatalf("failed to make .git read-only: %v", err)
+		}
 		defer func() {
 			// Restore permissions for cleanup
+			_ = os.Chmod(gitDir, 0755)
 			_ = os.Chmod(gitConfigPath, 0644)
 		}()
 

cmd/bd/doctor/sync_divergence.go

@@ -68,7 +68,7 @@ func CheckSyncDivergence(path string) DoctorCheck {
 	}
 
 	// Check 2: SQLite last_import_time vs JSONL mtime (SQLite only).
-	// Dolt backend does not maintain SQLite metadata and does not support import-only sync.
+	// Dolt backend does not maintain SQLite metadata; this SQLite-only check doesn't apply.
 	if backend == configfile.BackendSQLite {
 		mtimeIssue := checkSQLiteMtimeDivergence(path, beadsDir)
 		if mtimeIssue != nil {