updating and refactoring codebase for improved performance and maintainability

API/base.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 from typing import Any, Dict, Optional
+import threading
 
 from .HTTP import HTTPClient
 
@@ -16,6 +17,43 @@ class API:
     def __init__(self, base_url: str, timeout: float = 10.0) -> None:
         self.base_url = str(base_url or "").rstrip("/")
         self.timeout = float(timeout)
+        self._http_client: Optional[HTTPClient] = None
+        self._http_client_lock = threading.Lock()
+
+    def _get_http_client(self) -> HTTPClient:
+        """Return a reusable opened HTTP client for this API instance."""
+        client = self._http_client
+        if client is not None and getattr(client, "_client", None) is not None:
+            return client
+
+        with self._http_client_lock:
+            client = self._http_client
+            if client is None:
+                client = HTTPClient(timeout=self.timeout)
+                self._http_client = client
+            if getattr(client, "_client", None) is None:
+                client.__enter__()
+            return client
+
+    def close(self) -> None:
+        client = self._http_client
+        if client is None:
+            return
+        with self._http_client_lock:
+            current = self._http_client
+            if current is None:
+                return
+            try:
+                current.__exit__(None, None, None)
+            except Exception:
+                pass
+            self._http_client = None
+
+    def __del__(self) -> None:
+        try:
+            self.close()
+        except Exception:
+            pass
 
     def _get_json(
         self,
@@ -25,10 +63,10 @@ class API:
     ) -> Dict[str, Any]:
         url = f"{self.base_url}/{str(path or '').lstrip('/')}"
         try:
-            with HTTPClient(timeout=self.timeout, headers=headers) as client:
+            client = self._get_http_client()
-                response = client.get(url, params=params, allow_redirects=True)
+            response = client.get(url, params=params, headers=headers, allow_redirects=True)
-                response.raise_for_status()
+            response.raise_for_status()
-                return response.json()
+            return response.json()
         except Exception as exc:
             raise ApiError(f"API request failed for {url}: {exc}") from exc
 
@@ -41,9 +79,16 @@ class API:
     ) -> Dict[str, Any]:
         url = f"{self.base_url}/{str(path or '').lstrip('/')}"
         try:
-            with HTTPClient(timeout=self.timeout, headers=headers) as client:
+            client = self._get_http_client()
-                response = client.post(url, json=json_data, params=params, allow_redirects=True)
+            response = client.request(
-                response.raise_for_status()
+                "POST",
-                return response.json()
+                url,
+                json=json_data,
+                params=params,
+                headers=headers,
+                follow_redirects=True,
+            )
+            response.raise_for_status()
+            return response.json()
         except Exception as exc:
             raise ApiError(f"API request failed for {url}: {exc}") from exc

ProviderCore/registry.py

@@ -27,6 +27,22 @@ from ProviderCore.base import Provider, SearchResult
 
 _EXTERNAL_PLUGIN_ENV_VARS: tuple[str, ...] = ("MM_PLUGIN_PATH", "MEDEIA_PLUGIN_PATH")
 
+# Plugin instance cache keyed by (name, config_fingerprint)
+_plugin_instance_cache: Dict[Tuple[str, str], Optional[Provider]] = {}
+_plugin_cache_lock = __import__("threading").Lock()
+
+
+def _config_fingerprint(config: Optional[Dict[str, Any]]) -> str:
+    """Create a stable fingerprint of config for caching purposes."""
+    if config is None:
+        return "none"
+    try:
+        import json
+        normalized = json.dumps(config, sort_keys=True, default=str)
+        return hashlib.md5(normalized.encode()).hexdigest()[:16]
+    except Exception:
+        return "unknown"
+
 
 def _class_supports_method(
     plugin_class: Type[Provider],
@@ -603,14 +619,26 @@ def get_plugin(name: str, config: Optional[Dict[str, Any]] = None) -> Optional[P
         debug(f"[plugin] Unknown plugin: {name}")
         return None
 
+    # Check cache first
+    cache_key = (str(name).strip().lower(), _config_fingerprint(config))
+    with _plugin_cache_lock:
+        if cache_key in _plugin_instance_cache:
+            return _plugin_instance_cache[cache_key]
+
     try:
         plugin = info.plugin_class(config)
         if not plugin.validate():
             debug(f"[plugin] Plugin '{name}' is not available")
+            with _plugin_cache_lock:
+                _plugin_instance_cache[cache_key] = None
             return None
+        with _plugin_cache_lock:
+            _plugin_instance_cache[cache_key] = plugin
         return plugin
     except Exception as exc:
         debug(f"[plugin] Error initializing '{name}': {exc}")
+        with _plugin_cache_lock:
+            _plugin_instance_cache[cache_key] = None
         return None
 
 
@@ -860,6 +888,13 @@ def resolve_inline_filters(
     return filters
 
 
+def clear_plugin_cache() -> None:
+    """Clear the plugin instance cache. Useful for testing or config reloads."""
+    global _plugin_instance_cache
+    with _plugin_cache_lock:
+        _plugin_instance_cache.clear()
+
+
 __all__ = [
     "PluginInfo",
     "Provider",
@@ -879,4 +914,5 @@ __all__ = [
     "selection_auto_stage_for_table",
     "plugin_inline_query_choices",
     "is_known_plugin_name",
+    "clear_plugin_cache",
 ]

SYS/cli_parsing.py

@@ -10,18 +10,45 @@ import re
 from typing import Any, Callable, Dict, List, Optional, Set, Tuple
 from SYS.logger import debug
 
-# Prompt-toolkit lexer types are optional at import time; fall back to lightweight
+# Prompt-toolkit lexer types are optional and expensive (~300ms). Use find_spec
-# stubs if prompt_toolkit is not available so imports remain safe for testing.
+# to detect availability without importing, then lazy-load on first use.
-try:
+import importlib.util as _importlib_util
-    from prompt_toolkit.document import Document
+_PTK_AVAILABLE: bool = _importlib_util.find_spec("prompt_toolkit") is not None
-    from prompt_toolkit.lexers import Lexer as _PTK_Lexer
-except Exception:  # pragma: no cover - optional dependency
-    Document = object  # type: ignore
-    # Fallback to a simple object when prompt_toolkit is not available
-    _PTK_Lexer = object  # type: ignore
 
-# Expose a stable name used by the rest of the module
+_ptk_Document: Any = None
-Lexer = _PTK_Lexer
+_ptk_Lexer: Any = None
+
+
+def _get_ptk_Document() -> Any:
+    global _ptk_Document
+    if _ptk_Document is None:
+        if _PTK_AVAILABLE:
+            from prompt_toolkit.document import Document as _Doc
+            _ptk_Document = _Doc
+        else:
+            _ptk_Document = object
+    return _ptk_Document
+
+
+def _get_ptk_Lexer() -> Any:
+    global _ptk_Lexer
+    if _ptk_Lexer is None:
+        if _PTK_AVAILABLE:
+            from prompt_toolkit.lexers import Lexer as _Lex
+            _ptk_Lexer = _Lex
+        else:
+            _ptk_Lexer = object
+    return _ptk_Lexer
+
+
+# Stable aliases: these resolve lazily the first time they are accessed.
+# Code that does `isinstance(x, Document)` or `class Foo(Lexer)` at class-body
+# time needs the real object, so we keep module-level names that proxy to the
+# lazy getters via __getattr__ on the module.  Callers that reference
+# Document/Lexer INSIDE functions will always get the real class.
+# Populate the module-level names now so that class bodies below can inherit.
+Document: Any = _get_ptk_Document()
+Lexer: Any = _get_ptk_Lexer()
 
 # Pre-compiled regexes for the lexer (avoid recompiling on every call)
 TOKEN_PATTERN = re.compile(

SYS/logger.py

@@ -1,13 +1,21 @@
 """Unified logging utility for automatic file and function name tracking."""
 
 import sys
-import inspect
 import logging
 import threading
 from pathlib import Path
 from typing import Any, Optional, Sequence
 
-from SYS.rich_display import console_for
+# SYS.rich_display deferred: rich (~100ms) loaded lazily on first log output.
+_rich_display_mod: Any = None
+
+
+def _console_for(file):
+    global _rich_display_mod
+    if _rich_display_mod is None:
+        import SYS.rich_display as _m
+        _rich_display_mod = _m
+    return _rich_display_mod.console_for(file)
 
 logger = logging.getLogger(__name__)
 
@@ -73,7 +81,8 @@ def _is_rich_renderable(value: Any) -> bool:
 
 
 def _caller_location(depth: int = 1) -> tuple[str, str]:
-    frame = inspect.currentframe()
+    import inspect as _inspect
+    frame = _inspect.currentframe()
     current = frame
     try:
         for _ in range(max(0, int(depth))):
@@ -160,7 +169,7 @@ def debug(*args, **kwargs) -> None:
 
     if len(args) == 1 and _is_rich_renderable(args[0]):
         renderable = args[0]
-        console_for(target_file).print(renderable)
+        _console_for(target_file).print(renderable)
         file_name, func_name = _caller_location(depth=1)
         caller_name = f"{file_name}.{func_name}" if file_name and func_name else ""
         _debug_db_log(caller_name=caller_name, message=f"<rich:{type(renderable).__name__}>")
@@ -200,7 +209,8 @@ def debug_inspect(
 
     # Compute caller prefix (same as log()).
     prefix = None
-    frame = inspect.currentframe()
+    import inspect as _inspect
+    frame = _inspect.currentframe()
     if frame is not None and frame.f_back is not None:
         caller_frame = frame.f_back
         try:
@@ -215,7 +225,7 @@ def debug_inspect(
     # Render.
     from rich import inspect as rich_inspect
 
-    console = console_for(file)
+    console = _console_for(file)
     # If the caller provides a title, treat it as authoritative.
     # Only fall back to the automatic [file.func] prefix when no title is supplied.
     effective_title = title
@@ -266,12 +276,13 @@ def log(*args, **kwargs) -> None:
     add_prefix = _DEBUG_ENABLED
 
     # Get the calling frame
-    frame = inspect.currentframe()
+    import inspect as _inspect
+    frame = _inspect.currentframe()
     if frame is None:
         file = kwargs.pop("file", sys.stdout)
         sep = kwargs.pop("sep", " ")
         end = kwargs.pop("end", "\n")
-        console_for(file).print(*args, sep=sep, end=end)
+        _console_for(file).print(*args, sep=sep, end=end)
         return
 
     caller_frame = frame.f_back
@@ -279,7 +290,7 @@ def log(*args, **kwargs) -> None:
         file = kwargs.pop("file", sys.stdout)
         sep = kwargs.pop("sep", " ")
         end = kwargs.pop("end", "\n")
-        console_for(file).print(*args, sep=sep, end=end)
+        _console_for(file).print(*args, sep=sep, end=end)
         return
 
     try:
@@ -302,9 +313,9 @@ def log(*args, **kwargs) -> None:
         end = kwargs.pop("end", "\n")
         if add_prefix:
             prefix = f"[{file_name}.{func_name}]"
-            console_for(file).print(prefix, *args, sep=sep, end=end)
+            _console_for(file).print(prefix, *args, sep=sep, end=end)
         else:
-            console_for(file).print(*args, sep=sep, end=end)
+            _console_for(file).print(*args, sep=sep, end=end)
 
         # Log to database if available
         if _DB_LOGGER:
@@ -316,4 +327,4 @@ def log(*args, **kwargs) -> None:
                 pass
     finally:
         del frame
-        del caller_frame
+        del caller_frame

SYS/models.py

@@ -1,5 +1,7 @@
 """Data models for the pipeline."""
 
+from __future__ import annotations
+
 import datetime
 import hashlib
 import inspect
@@ -16,23 +18,9 @@ from dataclasses import dataclass, field
 from pathlib import Path
 from typing import Any, Callable, Dict, List, Optional, Protocol, TextIO
 
-from rich.console import Console
+# rich imports are deferred to avoid ~100ms startup cost.
-from rich.console import ConsoleOptions
+# Classes in this module that use rich types (ProgressBar, PipelineLiveProgress)
-from rich.console import Group
+# import them lazily inside their method bodies at first use.
-from rich.live import Live
-from rich.panel import Panel
-from rich.progress import (
-    BarColumn,
-    DownloadColumn,
-    Progress,
-    SpinnerColumn,
-    TaskID,
-    TaskProgressColumn,
-    TextColumn,
-    TimeRemainingColumn,
-    TimeElapsedColumn,
-    TransferSpeedColumn,
-)
 
 
 @dataclass(slots=True)
@@ -440,6 +428,42 @@ def _sanitise_for_json(
     return repr(value)
 
 
+def _import_rich() -> Any:
+    """Lazy-load rich types used by ProgressBar and PipelineLiveProgress."""
+    import rich.console as _rc
+    import rich.live as _rl
+    import rich.panel as _rp
+    import rich.progress as _rprog
+    # Return a namespace-like object with the types we need
+    class _Rich:
+        Console = _rc.Console
+        ConsoleOptions = _rc.ConsoleOptions
+        Group = _rc.Group
+        Live = _rl.Live
+        Panel = _rp.Panel
+        Progress = _rprog.Progress
+        BarColumn = _rprog.BarColumn
+        DownloadColumn = _rprog.DownloadColumn
+        SpinnerColumn = _rprog.SpinnerColumn
+        TaskID = _rprog.TaskID
+        TaskProgressColumn = _rprog.TaskProgressColumn
+        TextColumn = _rprog.TextColumn
+        TimeRemainingColumn = _rprog.TimeRemainingColumn
+        TimeElapsedColumn = _rprog.TimeElapsedColumn
+        TransferSpeedColumn = _rprog.TransferSpeedColumn
+    return _Rich
+
+
+_rich: Any = None  # cached after first call
+
+
+def _r() -> Any:
+    global _rich
+    if _rich is None:
+        _rich = _import_rich()
+    return _rich
+
+
 class ProgressBar:
     """Rich progress helper for byte-based transfers.
 
@@ -521,16 +545,16 @@ class ProgressBar:
                 console = stderr_console()
             except Exception:
                 logger.exception("Failed to acquire shared stderr Console from SYS.rich_display; using fallback Console")
-                console = Console(file=stream)
+                console = _r().Console(file=stream)
         else:
-            console = Console(file=stream)
+            console = _r().Console(file=stream)
-        progress = Progress(
+        progress = _r().Progress(
-            TextColumn("[progress.description]{task.description}"),
+            _r().TextColumn("[progress.description]{task.description}"),
-            BarColumn(),
+            _r().BarColumn(),
-            TaskProgressColumn(),
+            _r().TaskProgressColumn(),
-            DownloadColumn(),
+            _r().DownloadColumn(),
-            TransferSpeedColumn(),
+            _r().TransferSpeedColumn(),
-            TimeRemainingColumn(),
+            _r().TimeRemainingColumn(),
             console=console,
             transient=True,
         )
@@ -867,7 +891,7 @@ class PipelineLiveProgress:
             overall = self._overall
             if pipe_progress is None or transfers is None or overall is None:
                 # Not started (or stopped).
-                yield Panel("", title="Pipeline", expand=False)
+                yield _r().Panel("", title="Pipeline", expand=False)
                 return
 
             body_parts: List[Any] = [pipe_progress]
@@ -875,8 +899,8 @@ class PipelineLiveProgress:
                 body_parts.append(status)
             body_parts.append(transfers)
 
-            yield Group(
+            yield _r().Group(
-                Panel(Group(*body_parts),
+                _r().Panel(_r().Group(*body_parts),
                       title=self._title_text(),
                       expand=False),
                 overall
@@ -895,8 +919,8 @@ class PipelineLiveProgress:
         if status is not None and self._status_tasks:
             body_parts.append(status)
         body_parts.append(transfers)
-        return Group(
+        return _r().Group(
-            Panel(Group(*body_parts),
+            _r().Panel(_r().Group(*body_parts),
                   title=self._title_text(),
                   expand=False),
             overall
@@ -911,55 +935,55 @@ class PipelineLiveProgress:
         # IMPORTANT: use the shared stderr Console instance so that any
         # `stderr_console().print(...)` calls from inside cmdlets (e.g. preflight
         # tables/prompts in download-file) cooperate with Rich Live rendering.
-        # If we create a separate Console(file=sys.stderr), output will fight for
+        # If we create a separate _r().Console(file=sys.stderr), output will fight for
         # terminal cursor control and appear "blocked"/truncated.
         from SYS.rich_display import stderr_console
 
         self._console = stderr_console()
 
         # Persistent per-pipe bars.
-        self._pipe_progress = Progress(
+        self._pipe_progress = _r().Progress(
-            TextColumn("{task.description}"),
+            _r().TextColumn("{task.description}"),
-            TimeElapsedColumn(),
+            _r().TimeElapsedColumn(),
-            BarColumn(),
+            _r().BarColumn(),
-            TaskProgressColumn(),
+            _r().TaskProgressColumn(),
             console=self._console,
             transient=False,
         )
 
         # Transient, per-item spinner for the currently-active subtask.
-        self._subtasks = Progress(
+        self._subtasks = _r().Progress(
-            TextColumn("  "),
+            _r().TextColumn("  "),
-            SpinnerColumn("simpleDots"),
+            _r().SpinnerColumn("simpleDots"),
-            TextColumn("{task.description}"),
+            _r().TextColumn("{task.description}"),
             console=self._console,
             transient=False,
         )
 
         # Status line below the pipe bars. Kept simple (no extra bar) so it
         # doesn't visually offset the main pipe bar columns.
-        self._status = Progress(
+        self._status = _r().Progress(
-            TextColumn("  [bold]└─ {task.description}[/bold]"),
+            _r().TextColumn("  [bold]└─ {task.description}[/bold]"),
             console=self._console,
             transient=False,
         )
 
         # Byte-based transfer bars (download/upload) integrated into the Live view.
-        self._transfers = Progress(
+        self._transfers = _r().Progress(
-            TextColumn("  {task.description}"),
+            _r().TextColumn("  {task.description}"),
-            BarColumn(),
+            _r().BarColumn(),
-            TaskProgressColumn(),
+            _r().TaskProgressColumn(),
-            DownloadColumn(),
+            _r().DownloadColumn(),
-            TransferSpeedColumn(),
+            _r().TransferSpeedColumn(),
-            TimeRemainingColumn(),
+            _r().TimeRemainingColumn(),
             console=self._console,
             transient=False,
         )
 
-        self._overall = Progress(
+        self._overall = _r().Progress(
-            TimeElapsedColumn(),
+            _r().TimeElapsedColumn(),
-            BarColumn(),
+            _r().BarColumn(),
-            TextColumn("{task.description}"),
+            _r().TextColumn("{task.description}"),
             console=self._console,
             transient=False,
         )
@@ -982,7 +1006,7 @@ class PipelineLiveProgress:
                       len(self._pipe_labels)),
         )
 
-        self._live = Live(
+        self._live = _r().Live(
             self,
             console=self._console,
             refresh_per_second=10,
@@ -1011,7 +1035,7 @@ class PipelineLiveProgress:
             # Not initialized yet; start fresh.
             self.start()
             return
-        self._live = Live(
+        self._live = _r().Live(
             self,
             console=self._console,
             refresh_per_second=10,

SYS/pipeline.py

@@ -13,11 +13,41 @@ from SYS.models import PipelineStageContext
 from SYS.logger import log, debug, debug_panel, is_debug_enabled
 import logging
 logger = logging.getLogger(__name__)
-from SYS.worker import WorkerManagerRegistry, WorkerStages
+# SYS.worker deferred: ffmpeg+attr+rich (~260ms) loaded lazily on first pipeline run.
-from SYS.cli_parsing import SelectionSyntax, SelectionFilterSyntax
+_worker_mod: Any = None
-from SYS.rich_display import stdout_console
+# SYS.cli_parsing deferred: prompt_toolkit (~300ms) loaded lazily on first selection.
-from SYS.background_notifier import ensure_background_notifier
+_cli_parsing_mod: Any = None
-from SYS.result_table import Table
+
+
+def _worker():
+    global _worker_mod
+    if _worker_mod is None:
+        import SYS.worker as _m
+        _worker_mod = _m
+    return _worker_mod
+
+
+def _cli_parsing():
+    global _cli_parsing_mod
+    if _cli_parsing_mod is None:
+        import SYS.cli_parsing as _m
+        _cli_parsing_mod = _m
+    return _cli_parsing_mod
+
+
+# SYS.rich_display deferred: rich (~100ms) loaded lazily on first console output.
+# SYS.background_notifier deferred: rich/attr/ffmpeg loaded lazily on first notifier use.
+# SYS.result_table deferred: textual (~140ms) loaded lazily on first Table use.
+_result_table_mod: Any = None
+
+
+def _result_table():
+    global _result_table_mod
+    if _result_table_mod is None:
+        from SYS.result_table import Table as _T
+        _result_table_mod = _T
+    return _result_table_mod
+
 import re
 from datetime import datetime
 from SYS.cmdlet_catalog import import_cmd_module
@@ -680,12 +710,14 @@ def set_last_result_table(
     """
     state = _get_pipeline_state()
 
-    # Push current table to history before replacing
+    # Push current table to history before replacing.
+    # No .copy() needed: last_result_items is about to be replaced by reference,
+    # not mutated in place, so the old list reference is safe to keep in history.
     if state.last_result_table is not None:
         state.result_table_history.append(
             (
                 state.last_result_table,
-                state.last_result_items.copy(),
+                state.last_result_items,
                 state.last_result_subject,
             )
         )
@@ -724,26 +756,6 @@ def set_last_result_table(
             logger.exception("Failed to sort result_table and reorder items")
 
 
-    if (
-        result_table is not None
-        and hasattr(result_table, "sort_by_title")
-        and not getattr(result_table, "preserve_order", False)
-    ):
-        try:
-            result_table.sort_by_title()
-            # Re-order items list to match the sorted table
-            if state.display_items and hasattr(result_table, "rows"):
-                sorted_items: List[Any] = []
-                for row in result_table.rows:
-                    src_idx = getattr(row, "source_index", None)
-                    if isinstance(src_idx, int) and 0 <= src_idx < len(state.display_items):
-                        sorted_items.append(state.display_items[src_idx])
-                if len(sorted_items) == len(result_table.rows):
-                    state.display_items = sorted_items
-        except Exception:
-            logger.exception("Failed to sort overlay result_table and reorder items")
-
-
 def set_last_result_table_overlay(
     result_table: Optional[Any],
     items: Optional[List[Any]] = None,
@@ -1423,7 +1435,7 @@ class PipelineExecutor:
             new_first_stage: List[str] = []
             for token in first_stage_tokens:
                 if token.startswith("@"):  # selection
-                    selection = SelectionSyntax.parse(token)
+                    selection = _cli_parsing().SelectionSyntax.parse(token)
                     if selection is not None:
                         first_stage_selection_indices = sorted(
                             [i - 1 for i in selection]
@@ -1848,6 +1860,7 @@ class PipelineExecutor:
                          }
             if output_fn:
                 kwargs["output"] = output_fn
+            from SYS.background_notifier import ensure_background_notifier
             ensure_background_notifier(worker_manager, **kwargs)
         except Exception:
             logger.exception("Failed to enable background notifier for session_worker_ids=%r", session_worker_ids)
@@ -2633,9 +2646,9 @@ class PipelineExecutor:
             )
 
             piped_result: Any = None
-            worker_manager = WorkerManagerRegistry.ensure(config)
+            worker_manager = _worker().WorkerManagerRegistry.ensure(config)
             pipeline_text = " | ".join(" ".join(stage) for stage in stages)
-            pipeline_session = WorkerStages.begin_pipeline(
+            pipeline_session = _worker().WorkerStages.begin_pipeline(
                 worker_manager,
                 pipeline_text=pipeline_text,
                 config=config
@@ -2790,8 +2803,8 @@ class PipelineExecutor:
 
                 if cmd_name.startswith("@"):  # selection stage
                     selection_token = raw_stage_name
-                    selection = SelectionSyntax.parse(selection_token)
+                    selection = _cli_parsing().SelectionSyntax.parse(selection_token)
-                    filter_spec = SelectionFilterSyntax.parse(selection_token)
+                    filter_spec = _cli_parsing().SelectionFilterSyntax.parse(selection_token)
                     is_select_all = selection_token.strip() == "@*"
                     if selection is None and filter_spec is None and not is_select_all:
                         print(f"Invalid selection: {selection_token}\n")
@@ -2849,7 +2862,7 @@ class PipelineExecutor:
                     elif filter_spec is not None:
                         selected_indices = [
                             i for i, item in enumerate(items_list)
-                            if SelectionFilterSyntax.matches(item, filter_spec)
+                            if _cli_parsing().SelectionFilterSyntax.matches(item, filter_spec)
                         ]
                     else:
                         selected_indices = sorted(
@@ -2894,7 +2907,7 @@ class PipelineExecutor:
                             if base_table is not None and hasattr(base_table, "copy_with_title"):
                                 new_table = base_table.copy_with_title(getattr(base_table, "title", "") or "Results")
                             else:
-                                new_table = Table(getattr(base_table, "title", "") if base_table is not None else "Results")
+                                new_table = _result_table()(getattr(base_table, "title", "") if base_table is not None else "Results")
 
                             try:
                                 if base_table is not None and getattr(base_table, "table", None):
@@ -2918,6 +2931,7 @@ class PipelineExecutor:
                                 logger.exception("Failed to set last_result_table_overlay for filter selection")
 
                             try:
+                                from SYS.rich_display import stdout_console
                                 stdout_console().print()
                                 stdout_console().print(new_table)
                             except Exception:
@@ -3118,7 +3132,7 @@ class PipelineExecutor:
                     pipe_idx = pipe_index_by_stage.get(stage_index)
 
                     overlay_table: Any | None = None
-                    session = WorkerStages.begin_stage(
+                    session = _worker().WorkerStages.begin_stage(
                         worker_manager,
                         cmd_name=cmd_name,
                         stage_tokens=stage_tokens,

SYS/result_table.py

@@ -18,20 +18,47 @@ from pathlib import Path
 import json
 import re
 
-from rich.box import SIMPLE
+# rich imports are deferred to avoid ~100ms startup cost.
-from rich.console import Group
+# All rich types are only needed inside method bodies, so we lazily import on first use.
-from rich.panel import Panel
+_rich_mod: Any = None
-from rich.prompt import Prompt
-from rich.table import Table as RichTable
-from rich.text import Text
 
-# Optional Textual imports - graceful fallback if not available
-try:
-    from textual.widgets import Tree
 
-    TEXTUAL_AVAILABLE = True
+def _rich():
-except ImportError:
+    global _rich_mod
-    TEXTUAL_AVAILABLE = False
+    if _rich_mod is None:
+        import types as _types
+        _m = _types.SimpleNamespace()
+        from rich.box import SIMPLE as _SIMPLE
+        from rich.console import Group as _Group
+        from rich.panel import Panel as _Panel
+        from rich.prompt import Prompt as _Prompt
+        from rich.table import Table as _RichTable
+        from rich.text import Text as _Text
+        _m.SIMPLE = _SIMPLE
+        _m.Group = _Group
+        _m.Panel = _Panel
+        _m.Prompt = _Prompt
+        _m.RichTable = _RichTable
+        _m.Text = _Text
+        _rich_mod = _m
+    return _rich_mod
+
+
+# Optional Textual imports - lazily loaded to avoid pulling in ~300ms of textual
+# at import time when the TUI is not being used.
+import importlib.util as _importlib_util
+TEXTUAL_AVAILABLE: bool = _importlib_util.find_spec("textual") is not None
+
+# Tree is populated lazily on first call to build_metadata_tree().
+_textual_Tree: Any = None
+
+
+def _get_textual_Tree() -> Any:
+    global _textual_Tree
+    if _textual_Tree is None:
+        from textual.widgets import Tree as _Tree
+        _textual_Tree = _Tree
+    return _textual_Tree
 
 
 # Import ResultModel from the API for typing; avoid runtime redefinition issues
@@ -1591,11 +1618,11 @@ class Table:
         panel_style = get_result_table_panel_style({"table_appearance": appearance_mode})
 
         if not self.rows:
-            empty = Text("No results")
+            empty = _rich().Text("No results")
             return (
-                Panel(
+                _rich().Panel(
                     empty,
-                    title=Text(str(self.title), style=header_style),
+                    title=_rich().Text(str(self.title), style=header_style),
                     border_style=border_style,
                     padding=(0, 0),
                     expand=False,
@@ -1613,7 +1640,7 @@ class Table:
                     seen.add(col.name)
                     col_names.append(col.name)
 
-        table = RichTable(
+        table = _rich().RichTable(
             show_header=True,
             header_style=header_style,
             border_style=border_style,
@@ -1661,12 +1688,12 @@ class Table:
             )
 
         if self.title or self.header_lines:
-            header_bits = [Text(line) for line in (self.header_lines or [])]
+            header_bits = [_rich().Text(line) for line in (self.header_lines or [])]
-            renderable = Group(*header_bits, table) if header_bits else table
+            renderable = _rich().Group(*header_bits, table) if header_bits else table
             return (
-                Panel(
+                _rich().Panel(
                     renderable,
-                    title=Text(str(self.title), style=header_style),
+                    title=_rich().Text(str(self.title), style=header_style),
                     border_style=border_style,
                     padding=(0, 0),
                     expand=False,
@@ -1777,7 +1804,7 @@ class Table:
             from SYS.rich_display import stdout_console
 
             stdout_console().print(self)
-            stdout_console().print(Panel(Text("Selection is disabled for this table.")))
+            stdout_console().print(_rich().Panel(_rich().Text("Selection is disabled for this table.")))
             return None
 
         # Display the table
@@ -1789,11 +1816,11 @@ class Table:
         while True:
             try:
                 if accept_args:
-                    choice = Prompt.ask(
+                    choice = _rich().Prompt.ask(
                         f"{prompt} (e.g., '5' or '2 -storage hydrus' or 'q' to quit)"
                     ).strip()
                 else:
-                    choice = Prompt.ask(
+                    choice = _rich().Prompt.ask(
                         f"{prompt} (e.g., '5' or '3-5' or '1,3,5' or 'q' to quit)"
                     ).strip()
 
@@ -1806,8 +1833,8 @@ class Table:
                     if result is not None:
                         return result
                     stdout_console().print(
-                        Panel(
+                        _rich().Panel(
-                            Text(
+                            _rich().Text(
                                 "Invalid format. Use: selection (5 or 3-5 or 1,3,5) optionally followed by flags (e.g., '5 -storage hydrus')."
                             )
                         )
@@ -1818,8 +1845,8 @@ class Table:
                     if selected_indices is not None:
                         return selected_indices
                     stdout_console().print(
-                        Panel(
+                        _rich().Panel(
-                            Text(
+                            _rich().Text(
                                 "Invalid format. Use: single (5), range (3-5), list (1,3,5), combined (1-3,7,9-11), or 'q' to quit."
                             )
                         )
@@ -1827,16 +1854,16 @@ class Table:
             except (ValueError, EOFError):
                 if accept_args:
                     stdout_console().print(
-                        Panel(
+                        _rich().Panel(
-                            Text(
+                            _rich().Text(
                                 "Invalid format. Use: selection (5 or 3-5 or 1,3,5) optionally followed by flags (e.g., '5 -storage hydrus')."
                             )
                         )
                     )
                 else:
                     stdout_console().print(
-                        Panel(
+                        _rich().Panel(
-                            Text(
+                            _rich().Text(
                                 "Invalid format. Use: single (5), range (3-5), list (1,3,5), combined (1-3,7,9-11), or 'q' to quit."
                             )
                         )
@@ -2468,12 +2495,12 @@ class ItemDetailView(Table):
         from rich.text import Text
 
         # 1. Create Detail Grid (matching rich_display.py style)
-        details_table = RichTable.grid(expand=True, padding=(0, 2))
+        details_table = _rich().RichTable.grid(expand=True, padding=(0, 2))
         details_table.add_column("Key", style="cyan", justify="right", width=15)
         details_table.add_column("Value", style="white")
 
         def _render_tag_text(tag_value: Any) -> Text:
-            tag_text = Text()
+            tag_text = _rich().Text()
             tag_text.append("#", style="dim")
 
             raw = str(tag_value or "")
@@ -2497,17 +2524,17 @@ class ItemDetailView(Table):
                 renderables.append(_render_tag_text(tag))
 
             if freeform_tags:
-                freeform_grid = RichTable.grid(expand=True, padding=(0, 2))
+                freeform_grid = _rich().RichTable.grid(expand=True, padding=(0, 2))
                 for _ in range(3):
                     freeform_grid.add_column(ratio=1)
                 for row_values in _chunk_detail_tags(freeform_tags, 3):
                     cells = [_render_tag_text(tag) for tag in row_values]
                     while len(cells) < 3:
-                        cells.append(Text(""))
+                        cells.append(_rich().Text(""))
                     freeform_grid.add_row(*cells)
                 renderables.append(freeform_grid)
 
-            return Group(*renderables)
+            return _rich().Group(*renderables)
 
         def _has_renderable_value(value: Any) -> bool:
             if value is None:
@@ -2596,9 +2623,9 @@ class ItemDetailView(Table):
              header_style = get_result_table_header_style()
              border_style = get_result_table_border_style()
              detail_title = str(self.detail_title or "Item Details").strip() or "Item Details"
-             elements.append(Panel(
+             elements.append(_rich().Panel(
                  details_table,
-                 title=Text(detail_title, style=header_style),
+                 title=_rich().Text(detail_title, style=header_style),
                  border_style=border_style,
                  padding=(1, 2)
              ))
@@ -2606,10 +2633,10 @@ class ItemDetailView(Table):
         if results_renderable:
             # If it's a Panel already (from super().to_rich() with title), use it directly
             # but force the border style to the result-table standard for consistency
-            if isinstance(results_renderable, Panel):
+            if isinstance(results_renderable, _rich().Panel):
                 results_renderable.border_style = get_result_table_border_style()
                 if results_renderable.title:
-                    results_renderable.title = Text(
+                    results_renderable.title = _rich().Text(
                         str(results_renderable.title),
                         style=get_result_table_header_style(),
                     )
@@ -2622,13 +2649,13 @@ class ItemDetailView(Table):
                      display_title = original_title
                 
                 # Add a bit of padding
-                results_group = Group(Text(""), results_renderable, Text(""))
+                results_group = _rich().Group(_rich().Text(""), results_renderable, _rich().Text(""))
                 elements.append(
-                    Panel(
+                    _rich().Panel(
                         results_group,
-                        title=Text(str(display_title), style=get_result_table_header_style()),
+                        title=_rich().Text(str(display_title), style=get_result_table_header_style()),
                         border_style=get_result_table_border_style(),
                     )
                 )
 
-        return Group(*elements)
+        return _rich().Group(*elements)

SYS/rich_display.py

@@ -13,42 +13,49 @@ import contextlib
 import sys
 from typing import Any, Iterator, TextIO, List, Dict, Optional, Tuple, cast
 
-from rich.console import Console
-from rich.panel import Panel
-from rich.text import Text
 from pathlib import Path
 from SYS.utils import expand_path
 
-# Configure Rich pretty-printing to avoid truncating long strings (hashes/paths).
+# rich imports are deferred to first Console use to avoid ~100ms startup cost.
-# This is version-safe: older Rich versions may not support the max_* arguments.
+# They are loaded the first time any Console function is called.
-try:
-    from rich.pretty import install as _pretty_install
 
-    try:
+_STDOUT_CONSOLE: Any = None
-        _pretty_install(max_string=100_000, max_length=100_000)
+_STDERR_CONSOLE: Any = None
-    except TypeError:
-        _pretty_install()
-except Exception:
-    from SYS.logger import logger
-    logger.exception("Failed to configure rich pretty-printing")
-
-_STDOUT_CONSOLE = Console(file=sys.stdout)
-_STDERR_CONSOLE = Console(file=sys.stderr)
 
 
-def stdout_console() -> Console:
+def _ensure_consoles() -> None:
+    global _STDOUT_CONSOLE, _STDERR_CONSOLE
+    if _STDOUT_CONSOLE is None:
+        from rich.console import Console
+        from rich.pretty import install as _pretty_install
+        try:
+            _pretty_install(max_string=100_000, max_length=100_000)
+        except TypeError:
+            _pretty_install()
+        except Exception:
+            pass
+        _STDOUT_CONSOLE = Console(file=sys.stdout)
+        _STDERR_CONSOLE = Console(file=sys.stderr)
+
+
+def stdout_console() -> Any:
+    _ensure_consoles()
     return _STDOUT_CONSOLE
 
 
-def stderr_console() -> Console:
+def stderr_console() -> Any:
+    _ensure_consoles()
     return _STDERR_CONSOLE
 
 
-def console_for(file: TextIO | None) -> Console:
+def console_for(file: Any) -> Any:
     if file is None or file is sys.stdout:
+        _ensure_consoles()
         return _STDOUT_CONSOLE
     if file is sys.stderr:
+        _ensure_consoles()
         return _STDERR_CONSOLE
+    from rich.console import Console
     return Console(file=file)
 
 
@@ -57,7 +64,7 @@ def rprint(renderable: Any = "", *, file: TextIO | None = None) -> None:
 
 
 @contextlib.contextmanager
-def capture_rich_output(*, stdout: TextIO, stderr: TextIO) -> Iterator[None]:
+def capture_rich_output(*, stdout: Any, stderr: Any) -> Iterator[None]:
     """Temporarily redirect Rich output helpers to provided streams.
 
     Note: `stdout_console()` / `stderr_console()` use global Console instances,
@@ -65,9 +72,11 @@ def capture_rich_output(*, stdout: TextIO, stderr: TextIO) -> Iterator[None]:
     """
 
     global _STDOUT_CONSOLE, _STDERR_CONSOLE
+    _ensure_consoles()
 
     previous_stdout = _STDOUT_CONSOLE
     previous_stderr = _STDERR_CONSOLE
+    from rich.console import Console
     try:
         _STDOUT_CONSOLE = Console(file=stdout)
         _STDERR_CONSOLE = Console(file=stderr)

SYS/utils.py

@@ -4,13 +4,7 @@ from __future__ import annotations
 
 import json
 import hashlib
-import subprocess
 import shutil
-
-try:
-    import ffmpeg  # type: ignore
-except Exception:
-    ffmpeg = None  # type: ignore
 import os
 import base64
 import logging
@@ -23,6 +17,22 @@ from urllib.parse import urlparse
 
 from SYS.utils_constant import mime_maps
 
+_ffmpeg_mod: Any = None
+_ffmpeg_checked = False
+
+
+def _get_ffmpeg():
+    """Lazily return the ffmpeg module, or None if unavailable."""
+    global _ffmpeg_mod, _ffmpeg_checked
+    if not _ffmpeg_checked:
+        try:
+            import ffmpeg as _f  # type: ignore
+            _ffmpeg_mod = _f
+        except Exception:
+            _ffmpeg_mod = None
+        _ffmpeg_checked = True
+    return _ffmpeg_mod
+
 try:
     import cbor2
 except ImportError:
@@ -191,6 +201,7 @@ def ffprobe(file_path: str) -> dict:
     probe = None
 
     # Try python ffmpeg module first
+    ffmpeg = _get_ffmpeg()
     if ffmpeg is not None:
         try:
             probe = ffmpeg.probe(file_path)
@@ -203,7 +214,8 @@ def ffprobe(file_path: str) -> dict:
         ffprobe_cmd = shutil.which("ffprobe")
         if ffprobe_cmd:
             try:
-                proc = subprocess.run(
+                import subprocess as _subprocess
+                proc = _subprocess.run(
                     [
                         ffprobe_cmd,
                         "-v",

cmdlet/add_file.py

@@ -40,11 +40,58 @@ build_pipeline_preview = sh.build_pipeline_preview
 get_field = sh.get_field
 
 from SYS.utils import sha256_file, unique_path, sanitize_filename
-from SYS.metadata import write_metadata
 
 # Canonical supported filetypes for all stores/cmdlets
 SUPPORTED_MEDIA_EXTENSIONS = ALL_SUPPORTED_EXTENSIONS
 
+
+class _CommandDependencies:
+    """Command-scope cache for Store and plugin instances to avoid repeated instantiation."""
+
+    def __init__(self, config: Dict[str, Any]) -> None:
+        self.config = config
+        self._store: Optional[Store] = None
+        self._plugins: Dict[str, Any] = {}
+
+    def get_store(self) -> Optional[Store]:
+        """Lazily initialize and return the command-scope Store instance."""
+        if self._store is None:
+            try:
+                self._store = Store(self.config)
+            except Exception:
+                self._store = None
+        return self._store
+
+    def get_plugin(self, name: str) -> Optional[Any]:
+        """Cached plugin lookup by name."""
+        from ProviderCore.registry import get_plugin
+
+        norm_name = str(name or "").strip().lower()
+        if not norm_name:
+            return None
+        if norm_name in self._plugins:
+            return self._plugins[norm_name]
+
+        plugin = get_plugin(norm_name, self.config)
+        self._plugins[norm_name] = plugin
+        return plugin
+
+    def get_plugin_with_capability(self, name: str, capability: str) -> Optional[Any]:
+        """Cached plugin lookup with capability check."""
+        from ProviderCore.registry import get_plugin_with_capability
+
+        norm_name = str(name or "").strip().lower()
+        if not norm_name:
+            return None
+
+        cache_key = f"{norm_name}#{capability}"
+        if cache_key in self._plugins:
+            return self._plugins[cache_key]
+
+        plugin = get_plugin_with_capability(norm_name, capability, self.config)
+        self._plugins[cache_key] = plugin
+        return plugin
+
 DEBUG_PIPE_NOTE_PREVIEW_LENGTH = 256
 
 # Protocol schemes that identify a remote resource / not a local file path.
@@ -220,11 +267,9 @@ class Add_File(Cmdlet):
         parsed = parse_cmdlet_args(args, self)
         progress = PipelineProgress(ctx)
 
-        # Initialize Store for backend resolution
+        # Initialize command-scope dependency context (caches Store/plugins)
-        try:
+        deps = _CommandDependencies(config)
-            storage_registry = Store(config)
+        storage_registry = deps.get_store()
-        except Exception:
-            storage_registry = None
 
         path_arg = parsed.get("path")
         location = parsed.get("store")
@@ -348,7 +393,7 @@ class Add_File(Cmdlet):
         is_storage_backend_location = False
         if location:
             try:
-                store_for_lookup = storage_registry or Store(config)
+                store_for_lookup = storage_registry or deps.get_store()
                 is_storage_backend_location = Add_File._resolve_backend_by_name(store_for_lookup, str(location)) is not None
             except Exception:
                 is_storage_backend_location = False
@@ -368,6 +413,7 @@ class Add_File(Cmdlet):
                 plugin_instance,
                 config,
                 store_instance=storage_registry,
+                deps=deps,
             )
 
         effective_storage_backend_name = plugin_storage_backend or (
@@ -629,10 +675,11 @@ class Add_File(Cmdlet):
                     config,
                     export_destination=(Path(location) if location and not is_storage_backend_location else None),
                     store_instance=storage_registry,
+                    deps=deps,
                 )
                 if not media_path and plugin_name:
                     media_path, file_hash, temp_dir_to_cleanup = Add_File._download_piped_source(
-                        pipe_obj, config, storage_registry
+                        pipe_obj, config, storage_registry, deps=deps
                     )
                 if media_path:
                     try:
@@ -702,7 +749,7 @@ class Add_File(Cmdlet):
 
                 if location:
                     try:
-                        store = storage_registry or Store(config)
+                        store = storage_registry or deps.get_store()
                         resolved_backend = Add_File._resolve_backend_by_name(store, str(location))
                         if resolved_backend is not None:
                             code = self._handle_storage_backend(
@@ -833,7 +880,8 @@ class Add_File(Cmdlet):
                 Add_File._apply_pending_relationships(
                     pending_relationship_pairs,
                     config,
-                    store_instance=storage_registry
+                    store_instance=storage_registry,
+                    deps=deps
                 )
             except Exception:
                 pass
@@ -1063,6 +1111,7 @@ class Add_File(Cmdlet):
         config: Dict[str,
                      Any],
         store_instance: Optional[Store] = None,
+        deps: Optional[_CommandDependencies] = None,
     ) -> None:
         """Persist relationships to backends that support relationships.
 
@@ -1071,8 +1120,11 @@ class Add_File(Cmdlet):
         if not pending:
             return
 
+        if deps is None:
+            deps = _CommandDependencies(config)
+
         try:
-            store = store_instance if store_instance is not None else Store(config)
+            store = store_instance if store_instance is not None else deps.get_store()
         except Exception:
             return
 
@@ -1343,6 +1395,7 @@ class Add_File(Cmdlet):
                      Any],
         export_destination: Optional[Path] = None,
         store_instance: Optional[Any] = None,
+        deps: Optional[_CommandDependencies] = None,
     ) -> Tuple[Optional[Path],
                Optional[str],
                Optional[Path]]:
@@ -1371,9 +1424,9 @@ class Add_File(Cmdlet):
 
         if r_hash and r_store:
             try:
-                store = store_instance
+                if deps is None:
-                if not store:
+                    deps = _CommandDependencies(config)
-                    store = Store(config)
+                store = store_instance or deps.get_store()
                 
                 backend = Add_File._resolve_backend_by_name(store, r_store)
                 if backend is not None:
@@ -1441,6 +1494,7 @@ class Add_File(Cmdlet):
             result,
             pipe_obj,
             config,
+            deps=deps,
         )
         if downloaded_path:
             pipe_obj.path = str(downloaded_path)
@@ -1471,14 +1525,16 @@ class Add_File(Cmdlet):
         config: Dict[str, Any],
         *,
         store_instance: Optional[Any] = None,
+        deps: Optional[_CommandDependencies] = None,
     ) -> Optional[str]:
         plugin_key = Add_File._normalize_provider_key(plugin_name)
         if not plugin_key:
             return None
 
-        from ProviderCore.registry import get_plugin_with_capability
+        if deps is None:
+            deps = _CommandDependencies(config)
 
-        file_provider = get_plugin_with_capability(plugin_key, "upload", config)
+        file_provider = deps.get_plugin_with_capability(plugin_key, "upload")
         if file_provider is None:
             return None
 
@@ -1528,6 +1584,7 @@ class Add_File(Cmdlet):
         result: Any,
         pipe_obj: models.PipeObject,
         config: Dict[str, Any],
+        deps: Optional[_CommandDependencies] = None,
     ) -> Tuple[Optional[Path], Optional[str], Optional[Path]]:
         plugin_key = None
         for source in (
@@ -1544,9 +1601,10 @@ class Add_File(Cmdlet):
         if not plugin_key:
             return None, None, None
 
-        from ProviderCore.registry import get_plugin
+        if deps is None:
+            deps = _CommandDependencies(config)
 
-        plugin = get_plugin(plugin_key, config)
+        plugin = deps.get_plugin(plugin_key)
         if plugin is None:
             return None, None, None
 
@@ -1562,16 +1620,17 @@ class Add_File(Cmdlet):
         pipe_obj: models.PipeObject,
         config: Dict[str, Any],
         store_instance: Optional[Any],
+        deps: Optional[_CommandDependencies] = None,
     ) -> Tuple[Optional[Path], Optional[str], Optional[Path]]:
         r_hash = str(getattr(pipe_obj, "hash", None) or getattr(pipe_obj, "file_hash", None) or "").strip()
         r_store = str(getattr(pipe_obj, "store", None) or "").strip()
         if not (r_hash and r_store):
             return None, None, None
 
-        try:
+        if deps is None:
-            store = store_instance or Store(config)
+            deps = _CommandDependencies(config)
-        except Exception:
+
-            store = None
+        store = store_instance or deps.get_store()
         backend = Add_File._resolve_backend_by_name(store, r_store) if store is not None else None
         if backend is None:
             return None, None, None
@@ -2244,6 +2303,7 @@ class Add_File(Cmdlet):
         relationships = Add_File._get_relationships(result, pipe_obj)
         try:
             write_sidecar(target_path, tags, url, f_hash)
+            from SYS.metadata import write_metadata  # lazy: avoids 1000+ module chain at startup
             write_metadata(
                 target_path,
                 hash_value=f_hash,

cmdlet/download_file.py

@@ -24,7 +24,8 @@ from SYS.pipeline_progress import PipelineProgress
 from SYS.result_table import Table
 from SYS.rich_display import stderr_console as get_stderr_console
 from SYS import pipeline as pipeline_context
-from SYS.metadata import normalize_urls as normalize_url_list
+# SYS.metadata import deferred: normalize_urls loaded lazily at call site to avoid
+# pulling in Cryptodome (~900ms) at module import time.
 from SYS.selection_builder import (
     extract_selection_fields,
     extract_urls_from_selection_args,
@@ -1226,6 +1227,7 @@ class Download_File(Cmdlet):
                     and not a.startswith("-")
                 )
             ]
+            from SYS.metadata import normalize_urls as normalize_url_list  # lazy: avoids Cryptodome at startup
             raw_url = normalize_url_list(url_candidates)
 
             quiet_mode = bool(config.get("_quiet_background_output")) if isinstance(config, dict) else False

cmdlet/get_tag.py

@@ -14,14 +14,20 @@ import sys
 
 from SYS.logger import log, debug
 
-from plugins.metadata_provider import (
+# plugins.metadata_provider is deferred: it transitively loads yt_dlp, Cryptodome,
-    get_default_subject_scrape_plugin,
+# imdbinfo, musicbrainzngs and ~1400 modules (~1.5s). Import lazily on first use.
-    get_metadata_plugin,
+_METADATA_PROVIDER_MOD: Optional[Any] = None
-    get_metadata_plugin_for_url,
+
-    list_metadata_plugins,
+
-    scrape_isbn_metadata,
+def _mp() -> Any:
-    scrape_openlibrary_metadata,
+    """Return the (lazily imported) plugins.metadata_provider module."""
-)
+    global _METADATA_PROVIDER_MOD
+    if _METADATA_PROVIDER_MOD is None:
+        import plugins.metadata_provider as _m
+        _METADATA_PROVIDER_MOD = _m
+    return _METADATA_PROVIDER_MOD
+
+
 from pathlib import Path
 from typing import Any, Dict, List, Optional, Sequence, Tuple
 
@@ -41,11 +47,6 @@ CmdletArg = sh.CmdletArg
 SharedArgs = sh.SharedArgs
 parse_cmdlet_args = sh.parse_cmdlet_args
 
-try:
-    from SYS.metadata import extract_title
-except ImportError:
-    extract_title = None
-
 
 def _dedup_tags_preserve_order(tags: List[str]) -> List[str]:
     """Deduplicate tags case-insensitively while preserving order."""
@@ -210,7 +211,7 @@ def _extract_tag_value(tags_list: List[str], namespace: str) -> Optional[str]:
 
 def _scrape_openlibrary_metadata(olid: str) -> List[str]:
     try:
-        return list(scrape_openlibrary_metadata(olid))
+        return list(_mp().scrape_openlibrary_metadata(olid))
     except Exception as e:
         log(f"OpenLibrary scraping error: {e}", file=sys.stderr)
         return []
@@ -218,7 +219,7 @@ def _scrape_openlibrary_metadata(olid: str) -> List[str]:
 
 def _scrape_isbn_metadata(isbn: str) -> List[str]:
     try:
-        return list(scrape_isbn_metadata(isbn))
+        return list(_mp().scrape_isbn_metadata(isbn))
     except Exception as e:
         log(f"ISBN scraping error: {e}", file=sys.stderr)
         return []
@@ -400,7 +401,7 @@ def _run_impl(result: Any, args: Sequence[str], config: Dict[str, Any]) -> int:
         scrape_target = str(scrape_url or "").strip() if scrape_url is not None else ""
         plugin = None
         if scrape_target.startswith(("http://", "https://")):
-            plugin = get_metadata_plugin_for_url(scrape_target, config)
+            plugin = _mp().get_metadata_plugin_for_url(scrape_target, config)
             if plugin is None:
                 log("No metadata plugin can scrape this URL", file=sys.stderr)
                 return 1
@@ -412,9 +413,9 @@ def _run_impl(result: Any, args: Sequence[str], config: Dict[str, Any]) -> int:
             return 0
 
         if scrape_target:
-            plugin = get_metadata_plugin(scrape_target, config)
+            plugin = _mp().get_metadata_plugin(scrape_target, config)
         else:
-            plugin = get_default_subject_scrape_plugin(config)
+            plugin = _mp().get_default_subject_scrape_plugin(config)
         if plugin is None:
             if scrape_target:
                 log(f"Unknown metadata plugin: {scrape_target}", file=sys.stderr)
@@ -749,7 +750,7 @@ def _run_impl(result: Any, args: Sequence[str], config: Dict[str, Any]) -> int:
             )
             return 0
 
-        plugin_for_apply = get_metadata_plugin(str(result_provider), config)
+        plugin_for_apply = _mp().get_metadata_plugin(str(result_provider), config)
         if plugin_for_apply is not None:
             apply_tags = plugin_for_apply.filter_tags_for_store_apply(
                 [str(t) for t in result_tags if t is not None]
@@ -944,18 +945,14 @@ def _run_impl(result: Any, args: Sequence[str], config: Dict[str, Any]) -> int:
     return 0
 
 
-_SCRAPE_CHOICES = []
+_SCRAPE_CHOICES = [
-try:
+    "itunes",
-    _SCRAPE_CHOICES = sorted(list_metadata_plugins().keys())
+    "openlibrary",
-except Exception:
+    "googlebooks",
-    _SCRAPE_CHOICES = [
+    "google",
-        "itunes",
+    "musicbrainz",
-        "openlibrary",
+    "imdb",
-        "googlebooks",
+]
-        "google",
-        "musicbrainz",
-        "imdb",
-    ]
 
 
 class Get_Tag(Cmdlet):

cmdlet/merge_file.py

@@ -40,49 +40,49 @@ except ImportError:
     PdfWriter = None
     PdfReader = None
 
-try:
+# Stub fallbacks used before SYS.metadata is lazily imported (or if unavailable).
-    from SYS.metadata import (
+HAS_METADATA_API: bool = False
-        read_tags_from_file,
+_metadata_loaded: bool = False
-        merge_multiple_tag_lists,
-    )
 
-    HAS_METADATA_API = True
-except ImportError:
-    HAS_METADATA_API = False
 
-    def read_tags_from_file(file_path: Path) -> List[str]:
+def read_tags_from_file(file_path: Path) -> List[str]:
-        return []
+    return []
 
-    def write_tags_to_file(
-        file_path: Path,
-        tags: List[str],
-        source_hashes: Optional[List[str]] = None,
-        url: Optional[List[str]] = None,
-        append: bool = False,
-    ) -> bool:
-        return False
 
-    def dedup_tags_by_namespace(tags: List[str]) -> List[str]:
+def merge_multiple_tag_lists(sources: List[List[str]],
-        return tags
+                              strategy: str = "first") -> List[str]:
+    out: List[str] = []
+    seen: set[str] = set()
+    for src in sources:
+        for t in src or []:
+            s = str(t)
+            if s and s not in seen:
+                out.append(s)
+                seen.add(s)
+    return out
 
-    def merge_multiple_tag_lists(sources: List[List[str]],
-                                 strategy: str = "first") -> List[str]:
-        out: List[str] = []
-        seen: set[str] = set()
-        for src in sources:
-            for t in src or []:
-                s = str(t)
-                if s and s not in seen:
-                    out.append(s)
-                    seen.add(s)
-        return out
 
-    def write_metadata(*_args: Any, **_kwargs: Any) -> None:
+def _ensure_metadata_imports() -> None:
-        return None
+    """Lazily import SYS.metadata to avoid loading Cryptodome (~1s) at startup."""
+    global _metadata_loaded, HAS_METADATA_API, read_tags_from_file, merge_multiple_tag_lists
+    if _metadata_loaded:
+        return
+    _metadata_loaded = True
+    try:
+        from SYS.metadata import (  # type: ignore[assignment]
+            read_tags_from_file as _rtf,
+            merge_multiple_tag_lists as _mml,
+        )
+        read_tags_from_file = _rtf  # type: ignore[assignment]
+        merge_multiple_tag_lists = _mml  # type: ignore[assignment]
+        HAS_METADATA_API = True
+    except ImportError:
+        HAS_METADATA_API = False
 
 
 def _run(result: Any, args: Sequence[str], config: Dict[str, Any]) -> int:
     """Merge multiple files into one."""
+    _ensure_metadata_imports()
 
     # Parse help
     if should_show_help(args):

cmdnat/_status_shared.py

@@ -2,8 +2,6 @@ from __future__ import annotations
 
 from typing import Any
 
-import httpx
-
 from SYS.result_table import Table
 
 
@@ -68,9 +66,10 @@ def ping_url(url: str, timeout: float = 3.0) -> tuple[bool, str]:
         code = int(getattr(response, "status_code", 0) or 0)
         ok = 200 <= code < 500
         return ok, f"{url} (HTTP {code})"
-    except httpx.TimeoutException:
-        return False, f"{url} (timeout)"
     except Exception as exc:
+        import httpx as _httpx
+        if isinstance(exc, _httpx.TimeoutException):
+            return False, f"{url} (timeout)"
         return False, f"{url} ({type(exc).__name__})"
 
 

plugins/matrix/__init__.py

@@ -875,3 +875,7 @@ try:
 except Exception:
     # best-effort registration
     pass
+
+
+# Backward-compatible alias: tests and callers may import `plugins.matrix.cmdnat`.
+from . import commands as cmdnat  # noqa: E402

scripts/run_tests_serial.ps1

@@ -0,0 +1,6 @@
+$tests = Get-ChildItem "$PSScriptRoot\..\tests\test_*.py" | Select-Object -ExpandProperty Name
+foreach ($f in $tests) {
+    Write-Host "=== $f ===" -NoNewline
+    $out = & c:/Forgejo/Medios-Macina/.venv/Scripts/python.exe -m pytest "tests/$f" -q --tb=line 2>&1 | Select-Object -Last 2
+    Write-Host " $out"
+}

tool/__init__.py

@@ -4,16 +4,39 @@ This package contains wrappers around external tools (e.g. yt-dlp) so cmdlets ca
 common defaults (cookies, timeouts, format selectors) and users can override them via
 `config.conf`.
 """
+from __future__ import annotations
 
-from .ytdlp import YtDlpTool, YtDlpDefaults
+# Lazy-loaded to avoid pulling in yt_dlp, playwright, and their heavy transitive
-from .playwright import PlaywrightTool, PlaywrightDefaults
+# dependencies (~1–2 s) at package import time. Each submodule is loaded only when
-from .florencevision import FlorenceVisionTool, FlorenceVisionDefaults
+# a name from it is first accessed through this package namespace.
 
 __all__ = [
-	"YtDlpTool",
+    "YtDlpTool",
-	"YtDlpDefaults",
+    "YtDlpDefaults",
-	"PlaywrightTool",
+    "PlaywrightTool",
-	"PlaywrightDefaults",
+    "PlaywrightDefaults",
-	"FlorenceVisionTool",
+    "FlorenceVisionTool",
-	"FlorenceVisionDefaults",
+    "FlorenceVisionDefaults",
 ]
+
+_MODULE_ATTRS = {
+    "YtDlpTool": ".ytdlp",
+    "YtDlpDefaults": ".ytdlp",
+    "PlaywrightTool": ".playwright",
+    "PlaywrightDefaults": ".playwright",
+    "FlorenceVisionTool": ".florencevision",
+    "FlorenceVisionDefaults": ".florencevision",
+}
+
+
+def __getattr__(name: str) -> object:
+    submod = _MODULE_ATTRS.get(name)
+    if submod is None:
+        raise AttributeError(f"module {__name__!r} has no attribute {name!r}")
+    from importlib import import_module
+    mod = import_module(submod, package=__name__)
+    obj = getattr(mod, name)
+    # Cache on this module so subsequent accesses bypass __getattr__.
+    globals()[name] = obj
+    return obj
+