feat(backup): namespace migration standalone -> aipass.backup.* citizen — convert 47 internal imports across 11 files (apps.* -> aipass.backup.apps.*), fix importlib discovery string, drop sys.path/PROJECT_ROOT hack, add root __init__.py package marker. Diagnostics 0%->100%, Imports 99%->100%, overall 92%->95% (S220). Verified-by-artifact: all 10 drone cmds live, register+status e2e clean, ruff clean, zero standalone imports. Test_Quality (no suite) stays separate build (td-018)

src/aipass/backup/.aipass/aipass_local_prompt.md

@@ -63,8 +63,8 @@ apps/
 ## Working Habits
 
 - Project-owned design: .backup_system/ and .backupignore live in the TARGET project, not centrally
-- Standalone sys.path: uses `from apps.modules.*` / `from apps.handlers.*`, NOT `from aipass.backup.*`
-- Entry point sets PROJECT_ROOT on sys.path and AIPASS_BRANCH_NAME env var for Prax
+- Normal citizen namespace: uses `from aipass.backup.apps.modules.*` / `from aipass.backup.apps.handlers.*`
+- Entry point sets AIPASS_BRANCH_NAME env var for Prax
 - BUILTIN_IGNORES in patterns.py is the single source for default ignore patterns
 
 ## Known Gotchas

src/aipass/backup/__init__.py

@@ -0,0 +1,12 @@
+# =================== AIPass ====================
+# Name: __init__.py - Backup package root
+# Date: 2026-04-16
+# Version: 1.0.0
+# Category: backup
+#
+# CHANGELOG (Max 5 entries):
+#   - v1.0.0 (2026-04-16): Initial implementation
+#
+# CODE STANDARDS:
+#   - Package root for the Backup system
+# =============================================

src/aipass/backup/apps/backup.py

@@ -20,10 +20,6 @@ import sys
 from pathlib import Path
 from typing import Any
 
-PROJECT_ROOT = str(Path(__file__).resolve().parent.parent)
-if PROJECT_ROOT not in sys.path:
-    sys.path.insert(0, PROJECT_ROOT)
-
 os.environ.setdefault("AIPASS_BRANCH_NAME", "backup")
 
 from aipass.prax import logger
@@ -52,7 +48,7 @@ def discover_modules() -> list[Any]:
         if file_path.name.startswith("_"):
             continue
 
-        module_name = f"apps.modules.{file_path.stem}"
+        module_name = f"aipass.backup.apps.modules.{file_path.stem}"
 
         try:
             module = importlib.import_module(module_name)
@@ -100,7 +96,7 @@ def main():
     command = args[0]
 
     if command == "backup" and len(args) > 1:
-        from apps.modules.register import resolve_project
+        from aipass.backup.apps.modules.register import resolve_project
 
         target = args[1]
         project_root = resolve_project(target)
@@ -124,7 +120,7 @@ def main():
     remaining = args[1:] if len(args) > 1 else []
 
     if remaining and remaining[0].startswith("@"):
-        from apps.modules.register import resolve_project
+        from aipass.backup.apps.modules.register import resolve_project
 
         resolved = resolve_project(remaining[0])
         if resolved is None:

src/aipass/backup/apps/modules/all.py

@@ -13,10 +13,10 @@ import sys
 from aipass.prax import logger
 from aipass.cli.apps.modules import console
 
-from apps.handlers.json import json_handler
-from apps.handlers.report.formatter import format_result
-from apps.modules.snapshot import run_snapshot
-from apps.modules.versioned import run_versioned
+from aipass.backup.apps.handlers.json import json_handler
+from aipass.backup.apps.handlers.report.formatter import format_result
+from aipass.backup.apps.modules.snapshot import run_snapshot
+from aipass.backup.apps.modules.versioned import run_versioned
 
 MODULE_NAME = "all"
 PRIMARY_COMMAND = "all"

src/aipass/backup/apps/modules/drive_clear.py

@@ -15,7 +15,7 @@ import sys
 
 from aipass.prax import logger
 from aipass.cli.apps.modules import console
-from apps.handlers.json import json_handler
+from aipass.backup.apps.handlers.json import json_handler
 
 
 MODULE_NAME = "drive_clear"

src/aipass/backup/apps/modules/drive_stats.py

@@ -15,7 +15,7 @@ import sys
 
 from aipass.prax import logger
 from aipass.cli.apps.modules import console
-from apps.handlers.json import json_handler
+from aipass.backup.apps.handlers.json import json_handler
 
 
 MODULE_NAME = "drive_stats"

src/aipass/backup/apps/modules/drive_sync.py

@@ -15,7 +15,7 @@ import sys
 
 from aipass.prax import logger
 from aipass.cli.apps.modules import console
-from apps.handlers.json import json_handler
+from aipass.backup.apps.handlers.json import json_handler
 
 
 MODULE_NAME = "drive_sync"

src/aipass/backup/apps/modules/drive_test.py

@@ -15,7 +15,7 @@ import sys
 
 from aipass.prax import logger
 from aipass.cli.apps.modules import console
-from apps.handlers.json import json_handler
+from aipass.backup.apps.handlers.json import json_handler
 
 
 MODULE_NAME = "drive_test"

src/aipass/backup/apps/modules/register.py

@@ -14,10 +14,10 @@ from pathlib import Path
 from aipass.prax import logger
 from aipass.cli.apps.modules import console
 
-from apps.handlers.json import json_handler
-from apps.handlers.project.registry import lookup_project as _lookup_project
-from apps.handlers.project.registry import register_project
-from apps.handlers.project.setup import create_backup_dir
+from aipass.backup.apps.handlers.json import json_handler
+from aipass.backup.apps.handlers.project.registry import lookup_project as _lookup_project
+from aipass.backup.apps.handlers.project.registry import register_project
+from aipass.backup.apps.handlers.project.setup import create_backup_dir
 
 
 def resolve_project(target: str) -> str | None:

src/aipass/backup/apps/modules/settings.py

@@ -15,7 +15,7 @@ import sys
 
 from aipass.prax import logger
 from aipass.cli.apps.modules import console
-from apps.handlers.json import json_handler
+from aipass.backup.apps.handlers.json import json_handler
 
 
 MODULE_NAME = "settings"

src/aipass/backup/apps/modules/snapshot.py

@@ -15,20 +15,20 @@ import time
 from aipass.prax import logger
 from aipass.cli.apps.modules import console
 
-from apps.handlers.copy.snapshot import copy_snapshot
-from apps.handlers.ignore.patterns import load_patterns
-from apps.handlers.ignore.whitelist import load_whitelist
-from apps.handlers.json import json_handler
-from apps.handlers.path.builder import build_snapshot_path
-from apps.handlers.project.config import load_project_config
-from apps.handlers.project.setup import create_backup_dir
-from apps.handlers.report.formatter import format_result
-from apps.handlers.report.result import BackupResult
-from apps.handlers.scan.filter import filter_paths
-from apps.handlers.scan.walk import walk_project
-from apps.handlers.state.changelog import append_changelog
-from apps.handlers.state.metadata import build_metadata
-from apps.handlers.state.timestamps import save_timestamps
+from aipass.backup.apps.handlers.copy.snapshot import copy_snapshot
+from aipass.backup.apps.handlers.ignore.patterns import load_patterns
+from aipass.backup.apps.handlers.ignore.whitelist import load_whitelist
+from aipass.backup.apps.handlers.json import json_handler
+from aipass.backup.apps.handlers.path.builder import build_snapshot_path
+from aipass.backup.apps.handlers.project.config import load_project_config
+from aipass.backup.apps.handlers.project.setup import create_backup_dir
+from aipass.backup.apps.handlers.report.formatter import format_result
+from aipass.backup.apps.handlers.report.result import BackupResult
+from aipass.backup.apps.handlers.scan.filter import filter_paths
+from aipass.backup.apps.handlers.scan.walk import walk_project
+from aipass.backup.apps.handlers.state.changelog import append_changelog
+from aipass.backup.apps.handlers.state.metadata import build_metadata
+from aipass.backup.apps.handlers.state.timestamps import save_timestamps
 
 MODULE_NAME = "snapshot"
 PRIMARY_COMMAND = "snapshot"

src/aipass/backup/apps/modules/status.py

@@ -14,10 +14,10 @@ from pathlib import Path
 from aipass.prax import logger
 from aipass.cli.apps.modules import console
 
-from apps.handlers.json import json_handler
-from apps.handlers.path.builder import backup_root
-from apps.handlers.project.config import load_project_config
-from apps.handlers.state.changelog import load_changelog
+from aipass.backup.apps.handlers.json import json_handler
+from aipass.backup.apps.handlers.path.builder import backup_root
+from aipass.backup.apps.handlers.project.config import load_project_config
+from aipass.backup.apps.handlers.state.changelog import load_changelog
 
 MODULE_NAME = "status"
 PRIMARY_COMMAND = "status"

src/aipass/backup/apps/modules/versioned.py

@@ -17,20 +17,20 @@ from datetime import datetime, timezone
 from aipass.prax import logger
 from aipass.cli.apps.modules import console
 
-from apps.handlers.copy.versioned import copy_versioned
-from apps.handlers.ignore.patterns import load_patterns
-from apps.handlers.ignore.whitelist import load_whitelist
-from apps.handlers.json import json_handler
-from apps.handlers.path.builder import build_versioned_path
-from apps.handlers.project.config import load_project_config
-from apps.handlers.project.setup import create_backup_dir
-from apps.handlers.report.formatter import format_result
-from apps.handlers.report.result import BackupResult
-from apps.handlers.scan.filter import filter_paths
-from apps.handlers.scan.walk import walk_project
-from apps.handlers.state.changelog import append_changelog
-from apps.handlers.state.metadata import build_metadata
-from apps.handlers.state.timestamps import load_timestamps, save_timestamps
+from aipass.backup.apps.handlers.copy.versioned import copy_versioned
+from aipass.backup.apps.handlers.ignore.patterns import load_patterns
+from aipass.backup.apps.handlers.ignore.whitelist import load_whitelist
+from aipass.backup.apps.handlers.json import json_handler
+from aipass.backup.apps.handlers.path.builder import build_versioned_path
+from aipass.backup.apps.handlers.project.config import load_project_config
+from aipass.backup.apps.handlers.project.setup import create_backup_dir
+from aipass.backup.apps.handlers.report.formatter import format_result
+from aipass.backup.apps.handlers.report.result import BackupResult
+from aipass.backup.apps.handlers.scan.filter import filter_paths
+from aipass.backup.apps.handlers.scan.walk import walk_project
+from aipass.backup.apps.handlers.state.changelog import append_changelog
+from aipass.backup.apps.handlers.state.metadata import build_metadata
+from aipass.backup.apps.handlers.state.timestamps import load_timestamps, save_timestamps
 
 MODULE_NAME = "versioned"
 PRIMARY_COMMAND = "versioned"