diff --git a/Readme.org b/Readme.org
index 51ed7cd..20d5afa 100644
--- a/Readme.org
+++ b/Readme.org
@@ -147,6 +147,29 @@ une modification concurrente de type lire-modifier-écrire, utiliser
 =atomic_update_json= : cet utilitaire protège l'opération complète avec
 un verrou inter-processus Linux/Windows.
 
+*** Convention des scripts standardisés
+
+Les scripts standardisés exposent =build_parser()=, =run(...)= et
+=main(argv=None)=. Leur import ne lance aucun traitement. Ils acceptent
+le dossier d'évaluation comme premier argument positionnel, utilisent
+=EvaluationWorkspace= pour les chemins partagés et peuvent afficher la
+trace complète d'une erreur avec =--verbose=.
+
+Les codes de sortie communs sont :
+
+| Code | Signification |
+|------+---------------|
+|    0 | réussite |
+|    1 | erreur de traitement |
+|    2 | arguments invalides |
+|    3 | évaluation ou prérequis invalides |
+|    4 | traitement partiel, avec avertissements |
+|  130 | interruption par l'utilisateur |
+
+Le GUI distingue notamment un traitement partiel d'un échec. Les
+premiers scripts migrés vers cette convention sont =export.py=,
+=import.py=, =giving_names.py= et =grouping.py=.
+
 ** Correction d'un paquet de copies
 
  1. Créer un fichier =names= dans le dossier courant, avec les
diff --git a/copienator/__init__.py b/copienator/__init__.py
index ffc8901..bdc56e3 100644
--- a/copienator/__init__.py
+++ b/copienator/__init__.py
@@ -1,5 +1,13 @@
 """Core building blocks shared by Copienator scripts and interfaces."""
 
+from .cli import (
+    CliError,
+    ExitCode,
+    evaluation_parser,
+    evaluation_workspace,
+    execute,
+    workspace_from_args,
+)
 from .json_io import (
     JsonLockTimeout,
     atomic_update_json,
@@ -14,12 +22,18 @@ from .workspace import (
 )
 
 __all__ = [
+    "CliError",
     "EvaluationWorkspace",
+    "ExitCode",
     "JsonLockTimeout",
     "WorkspaceNotFoundError",
     "WorkspaceValidationError",
     "atomic_update_json",
     "atomic_write_json",
     "atomic_write_text",
+    "evaluation_parser",
+    "evaluation_workspace",
+    "execute",
     "read_json",
+    "workspace_from_args",
 ]
diff --git a/copienator/cli.py b/copienator/cli.py
new file mode 100644
index 0000000..509b6f8
--- /dev/null
+++ b/copienator/cli.py
@@ -0,0 +1,102 @@
+from __future__ import annotations
+
+import argparse
+import sys
+import traceback
+from collections.abc import Callable, Sequence
+from enum import IntEnum
+from pathlib import Path
+from typing import Any
+
+from .workspace import (
+    EvaluationWorkspace,
+    WorkspaceNotFoundError,
+    WorkspaceValidationError,
+)
+
+
+class ExitCode(IntEnum):
+    SUCCESS = 0
+    FAILURE = 1
+    INVALID_ARGUMENTS = 2
+    INVALID_WORKSPACE = 3
+    PARTIAL = 4
+    INTERRUPTED = 130
+
+
+class CliError(Exception):
+    def __init__(self, message: str, exit_code: ExitCode = ExitCode.FAILURE) -> None:
+        self.exit_code = exit_code
+        super().__init__(message)
+
+
+def evaluation_parser(description: str) -> argparse.ArgumentParser:
+    parser = argparse.ArgumentParser(description=description)
+    parser.add_argument(
+        "evaluation",
+        type=Path,
+        help="Evaluation directory",
+    )
+    parser.add_argument(
+        "--verbose",
+        action="store_true",
+        help="Show a traceback when an unexpected error occurs",
+    )
+    return parser
+
+
+def evaluation_workspace(
+    path: str | Path,
+    *,
+    repository: str | Path | None = None,
+) -> EvaluationWorkspace:
+    root = Path(path).expanduser().resolve()
+    if not root.exists():
+        raise CliError(
+            f"Evaluation directory does not exist: {root}",
+            ExitCode.INVALID_WORKSPACE,
+        )
+    if not root.is_dir():
+        raise CliError(
+            f"Evaluation path is not a directory: {root}",
+            ExitCode.INVALID_WORKSPACE,
+        )
+    return EvaluationWorkspace(root, Path(repository) if repository is not None else None)
+
+
+def workspace_from_args(
+    args: argparse.Namespace,
+    *,
+    repository: str | Path | None = None,
+) -> EvaluationWorkspace:
+    return evaluation_workspace(args.evaluation, repository=repository)
+
+
+def execute(
+    parser: argparse.ArgumentParser,
+    argv: Sequence[str] | None,
+    handler: Callable[[argparse.Namespace], int | ExitCode | None],
+) -> int:
+    args = parser.parse_args(argv)
+    try:
+        result = handler(args)
+    except CliError as exc:
+        print(f"Error: {exc}", file=sys.stderr)
+        return int(exc.exit_code)
+    except (WorkspaceNotFoundError, WorkspaceValidationError) as exc:
+        print(f"Error: {exc}", file=sys.stderr)
+        return int(ExitCode.INVALID_WORKSPACE)
+    except KeyboardInterrupt:
+        print("Interrupted by user.", file=sys.stderr)
+        return int(ExitCode.INTERRUPTED)
+    except Exception as exc:  # noqa: BLE001 - executable boundary
+        if getattr(args, "verbose", False):
+            traceback.print_exc()
+        else:
+            print(f"Error: {exc}", file=sys.stderr)
+        return int(ExitCode.FAILURE)
+    return int(ExitCode.SUCCESS if result is None else result)
+
+
+def stderr(message: Any) -> None:
+    print(message, file=sys.stderr)
diff --git a/copienator/workspace.py b/copienator/workspace.py
index d86667a..46e3dc7 100644
--- a/copienator/workspace.py
+++ b/copienator/workspace.py
@@ -186,6 +186,24 @@ class EvaluationWorkspace:
         if missing:
             raise WorkspaceValidationError(self.root, missing)
 
+    def require_files(self, *relative_paths: str) -> None:
+        missing = [
+            relative_path
+            for relative_path in relative_paths
+            if not (self.root / relative_path).is_file()
+        ]
+        if missing:
+            raise WorkspaceValidationError(self.root, missing)
+
+    def require_directories(self, *relative_paths: str) -> None:
+        missing = [
+            relative_path
+            for relative_path in relative_paths
+            if not (self.root / relative_path).is_dir()
+        ]
+        if missing:
+            raise WorkspaceValidationError(self.root, missing)
+
     def ensure_control_directories(self) -> None:
         self.logs_dir.mkdir(parents=True, exist_ok=True)
         self.runs_dir.mkdir(parents=True, exist_ok=True)
diff --git a/copienator_gui/app.py b/copienator_gui/app.py
index 5171c75..fd566e7 100644
--- a/copienator_gui/app.py
+++ b/copienator_gui/app.py
@@ -7,6 +7,7 @@ from pathlib import Path
 from tkinter import filedialog, messagebox, ttk
 from typing import Any
 
+from copienator import ExitCode
 from platform_utils import WindowsLabelError, validate_windows_labels
 
 from .diagnostics import collect_diagnostics
@@ -26,6 +27,7 @@ STATUS_LABELS = {
     "ready": "Prête",
     "running": "En cours",
     "success": "Réussie",
+    "partial": "Partielle",
     "failed": "Échouée",
     "interrupted": "Interrompue",
     "skipped": "Ignorée",
@@ -34,6 +36,16 @@ STATUS_LABELS = {
 }
 
 
+def process_status(return_code: int, interrupted: bool = False) -> str:
+    if interrupted or return_code == ExitCode.INTERRUPTED:
+        return "interrupted"
+    if return_code == ExitCode.SUCCESS:
+        return "success"
+    if return_code == ExitCode.PARTIAL:
+        return "partial"
+    return "failed"
+
+
 class CopienatorApp(tk.Tk):
     def __init__(
         self,
@@ -624,10 +636,7 @@ class CopienatorApp(tk.Tk):
         step_id = self.active_step_id
         if not step_id:
             return
-        if interrupted:
-            status = "interrupted"
-        else:
-            status = "success" if return_code == 0 else "failed"
+        status = process_status(return_code, interrupted)
         self.state_store.update_step(step_id, status=status, return_code=return_code)
         self.state_store.add_history(
             {
diff --git a/export.py b/export.py
index 00b0dde..25d5059 100644
--- a/export.py
+++ b/export.py
@@ -1,44 +1,65 @@
 import argparse
 import sys
+from collections.abc import Sequence
 from pathlib import Path
 
 from config import EXPORT_DIR
+from copienator import (
+    EvaluationWorkspace,
+    ExitCode,
+    evaluation_parser,
+    execute,
+    workspace_from_args,
+)
 from platform_utils import replace_with_link_or_copy
 
 
-def export_directory(base_dir, source_dir_name):
-    base_dir = Path(base_dir).expanduser().resolve()
-    source_dir = base_dir / source_dir_name
-    sync_dir = Path(EXPORT_DIR).expanduser() / base_dir.name
+def export_directory(
+    workspace: EvaluationWorkspace,
+    source_dir_name: str,
+) -> ExitCode:
+    workspace.require_directories(source_dir_name)
+    source_dir = workspace.root / source_dir_name
+    sync_dir = Path(EXPORT_DIR).expanduser() / workspace.name
     sync_dir.mkdir(parents=True, exist_ok=True)
 
-    if not source_dir.is_dir():
-        print(f"Erreur : le sous-dossier {source_dir} n'existe pas.")
-        return
-
     subdirs = [directory for directory in source_dir.iterdir() if directory.is_dir()]
     if source_dir_name == "BGnot" and subdirs:
         all_start_with_copie = all(directory.name.startswith("Copie") for directory in subdirs)
         if not all_start_with_copie:
             subdirs = [directory for directory in subdirs if not directory.name.startswith("Copie")]
 
+    missing_outputs = 0
     for subdir in subdirs:
         concat_file = subdir / "Concat.pdf"
         if not concat_file.is_file():
-            print(f"Attention : le fichier {concat_file} est introuvable.")
+            print(f"Warning: file not found: {concat_file}", file=sys.stderr)
+            missing_outputs += 1
             continue
         destination = sync_dir / f"{subdir.name}.pdf"
         method = replace_with_link_or_copy(concat_file, destination, prefer="hardlink")
         print(f"Exported: {destination} ({method})")
+    return ExitCode.PARTIAL if missing_outputs else ExitCode.SUCCESS
+
+
+def build_parser() -> argparse.ArgumentParser:
+    parser = evaluation_parser("Export annotated PDFs to the tablet directory.")
+    parser.add_argument("--refaire", action="store_true", help="Process only copies/labels defined in refaire.json")
+    return parser
+
+
+def run(workspace: EvaluationWorkspace, *, refaire: bool = False) -> ExitCode:
+    return export_directory(workspace, "BRnot" if refaire else "BGnot")
+
+
+def main(argv: Sequence[str] | None = None) -> int:
+    parser = build_parser()
+    return execute(
+        parser,
+        argv,
+        lambda args: run(workspace_from_args(args), refaire=args.refaire),
+    )
 
 
 if __name__ == "__main__":
-    parser = argparse.ArgumentParser(description="Move to tablette folder.")
-    parser.add_argument("dir", help="The directory to process")
-    parser.add_argument("--refaire", action="store_true", help="Process only copies/labels defined in refaire.json")
-
-    args = parser.parse_args()
-    if args.refaire:
-        export_directory(args.dir, "BRnot")
-        sys.exit(0)
-    export_directory(args.dir, "BGnot")
+    raise SystemExit(main())
diff --git a/giving_names.py b/giving_names.py
index fd14c9c..5c68eb6 100644
--- a/giving_names.py
+++ b/giving_names.py
@@ -1,102 +1,165 @@
-import json
-import os
+from __future__ import annotations
+
+import argparse
 import re
 import sys
 from collections import defaultdict
+from collections.abc import Sequence
 from pathlib import Path
 
+from copienator import (
+    EvaluationWorkspace,
+    ExitCode,
+    evaluation_parser,
+    execute,
+    read_json,
+    workspace_from_args,
+)
 from platform_utils import replace_with_link_or_copy, safe_filename
 
-def main():
-    if len(sys.argv) < 3:
-        print("Usage: python giving_names.py <directory_path> <Bnot/BGnot>")
-        sys.exit(1)
+ANNOTATION_CHOICES = ("BGnot", "Bnot", "Anot")
 
-    work_dir = os.path.abspath(sys.argv[1])
-    copies_dir = Path(work_dir) / "Copies"
-    bnot_dir = sys.argv[2]
-    target_subdir = os.path.join(work_dir, "A Rendre")
-    os.makedirs(target_subdir, exist_ok=True)
 
-    # --- 1. Load the expected names list ---
-    expected_names = set()
-    names_path = os.path.join(work_dir, "names")
-    if not os.path.exists(names_path):
-        names_path = "names" # Fallback to current dir
+def build_parser() -> argparse.ArgumentParser:
+    parser = evaluation_parser("Assign student names and prepare the return directory.")
+    parser.add_argument(
+        "annotation_dir",
+        choices=ANNOTATION_CHOICES,
+        help="Annotation directory to use",
+    )
+    return parser
 
-    if os.path.exists(names_path):
-        with open(names_path, 'r', encoding='utf-8') as f:
-            expected_names = {line.strip() for line in f if line.strip()}
-    else:
-        print(f"Warning: 'names' file not found in {work_dir} or current directory.")
 
-    # --- 2. Existing Collection Logic ---
+def _read_expected_names(workspace: EvaluationWorkspace) -> set[str]:
+    names_path = workspace.names_file()
+    if not names_path.exists():
+        print(
+            f"Warning: names file not found in {workspace.root} or the current directory.",
+            file=sys.stderr,
+        )
+        return set()
+    return {
+        line.strip()
+        for line in names_path.read_text(encoding="utf-8").splitlines()
+        if line.strip()
+    }
+
+
+def prepare_named_returns(
+    workspace: EvaluationWorkspace,
+    annotation_dir_name: str,
+) -> ExitCode:
+    workspace.require_directories("Copies", annotation_dir_name)
+    workspace.return_dir.mkdir(parents=True, exist_ok=True)
+
+    expected_names = _read_expected_names(workspace)
+    copies_map: defaultdict[str, list[str]] = defaultdict(list)
     pattern = re.compile(r"^Copie(\d+)\.json$")
-    copies_map = defaultdict(list)
-    assigned_names = set() # To track which names were successfully linked
+    had_errors = False
 
-    for filename in os.listdir(copies_dir):
-        match = pattern.match(filename)
-        if match:
-            copie_id = match.group(1)
-            json_path = os.path.join(copies_dir, filename)
-            try:
-                with open(json_path, 'r', encoding='utf-8') as f:
-                    data = json.load(f)
-                    name = data.get("name", "Unknown").strip()
-                    copies_map[name].append(copie_id)
-            except Exception as e:
-                print(f"Error processing {filename}: {e}")
+    for json_path in workspace.copies_dir.iterdir():
+        match = pattern.match(json_path.name)
+        if not match:
+            continue
+        try:
+            data = read_json(json_path)
+            if not isinstance(data, dict):
+                raise TypeError("expected a JSON object")
+            name = str(data.get("name", "Unknown")).strip()
+            copies_map[name].append(match.group(1))
+        except (OSError, TypeError, ValueError) as exc:
+            print(f"Error processing {json_path}: {exc}", file=sys.stderr)
+            had_errors = True
 
-    # --- 3. Process and Link ---
-    for name, ids in copies_map.items():
+    assigned_names: set[str] = set()
+    selected_annotations = workspace.root / annotation_dir_name
+    fallback_annotations = workspace.annotation_dir("simple")
+
+    for name, copy_ids in copies_map.items():
         if name == "Unknown":
-            print(f"ALERT: 'Unknown' name found for IDs: {', '.join(ids)}")
-        elif len(ids) > 1:
-            print(f"ALERT: Name '{name}' assigned to multiple IDs: {', '.join(ids)}")
+            print(
+                f"Warning: unknown name for copies: {', '.join(copy_ids)}",
+                file=sys.stderr,
+            )
+        elif len(copy_ids) > 1:
+            print(
+                f"Warning: name {name!r} is assigned to multiple copies: "
+                f"{', '.join(copy_ids)}",
+                file=sys.stderr,
+            )
 
         safe_name = safe_filename(name)
-
-        for copie_id in ids:
-            path_b = os.path.join(work_dir, f"{bnot_dir}/Copie{copie_id}")
-            path_a = os.path.join(work_dir, f"Anot/Copie{copie_id}")
-
+        for copy_id in copy_ids:
+            selected = selected_annotations / f"Copie{copy_id}"
+            fallback = fallback_annotations / f"Copie{copy_id}"
             source_folder = None
-            if os.path.exists(os.path.join(path_b, "Concat.jpg")) and os.path.exists(os.path.join(path_b, "score.json")):
-                source_folder = path_b
-            elif os.path.exists(os.path.join(path_a, "Concat.jpg")) and os.path.exists(os.path.join(path_a, "score.json")):
-                source_folder = path_a
-
-            if not source_folder:
+            for candidate in (selected, fallback):
+                if (candidate / "Concat.jpg").exists() and (
+                    candidate / "score.json"
+                ).exists():
+                    source_folder = candidate
+                    break
+            if source_folder is None:
                 continue
 
-            # If we reached here, the link is possible
             assigned_names.add(name)
-
-            dest_folder_name = f"{safe_name} ({copie_id})"
-            dest_path = os.path.join(target_subdir, dest_folder_name)
-            os.makedirs(dest_path, exist_ok=True)
-
-            links = [("Concat.jpg", f"{safe_name}.jpg"),("Concat_F.pdf", f"{safe_name}.pdf"), ("score.json", "score.json")]
-            for src_name, dst_name in links:
-                src_file = os.path.join(source_folder, src_name)
-                dst_link = os.path.join(dest_path, dst_name)
+            destination = workspace.return_dir / f"{safe_name} ({copy_id})"
+            destination.mkdir(parents=True, exist_ok=True)
+            links = (
+                ("Concat.jpg", f"{safe_name}.jpg"),
+                ("Concat_F.pdf", f"{safe_name}.pdf"),
+                ("score.json", "score.json"),
+            )
+            for source_name, destination_name in links:
+                source = source_folder / source_name
+                if not source.exists():
+                    continue
                 try:
-                    if os.path.exists(src_file):
-                        method = replace_with_link_or_copy(src_file, dst_link, prefer="symlink")
-                        if method == "copy":
-                            print(f"Copied {src_name} for {dest_folder_name} (links unavailable)")
-                except OSError as e:
-                    print(f"Error linking {src_name} for {dest_folder_name}: {e}")
+                    method = replace_with_link_or_copy(
+                        source,
+                        destination / destination_name,
+                        prefer="symlink",
+                    )
+                    if method == "copy":
+                        print(
+                            f"Copied {source_name} for {destination.name} "
+                            "(links unavailable)"
+                        )
+                except OSError as exc:
+                    print(
+                        f"Error linking {source} for {destination.name}: {exc}",
+                        file=sys.stderr,
+                    )
+                    had_errors = True
 
-    # --- 4. Print Unassigned Names ---
     unassigned = expected_names - assigned_names
     if unassigned:
-        print("\n" + "!" * 40)
-        print("NAMES FROM LIST NOT ASSIGNED:")
-        for n in sorted(unassigned):
-            print(f" - {n}")
-        print("!" * 40)
+        print("Names from the list that were not assigned:", file=sys.stderr)
+        for name in sorted(unassigned):
+            print(f" - {name}", file=sys.stderr)
+
+    return ExitCode.PARTIAL if had_errors else ExitCode.SUCCESS
+
+
+def run(
+    workspace: EvaluationWorkspace,
+    *,
+    annotation_dir: str,
+) -> ExitCode:
+    return prepare_named_returns(workspace, annotation_dir)
+
+
+def main(argv: Sequence[str] | None = None) -> int:
+    parser = build_parser()
+    return execute(
+        parser,
+        argv,
+        lambda args: run(
+            workspace_from_args(args, repository=Path.cwd()),
+            annotation_dir=args.annotation_dir,
+        ),
+    )
+
 
 if __name__ == "__main__":
-    main()
+    raise SystemExit(main())
diff --git a/grouping.py b/grouping.py
index 0008f04..f28c5e9 100644
--- a/grouping.py
+++ b/grouping.py
@@ -1,13 +1,22 @@
+import argparse
 import os
-import json
 import re
-import sys
 import shutil
-from pathlib import Path
 from collections import defaultdict
+from collections.abc import Sequence
 from concurrent.futures import ThreadPoolExecutor
-from PIL import Image, ImageDraw, ImageFont
+
 from pdf2image import convert_from_path, pdfinfo_from_path
+from PIL import Image, ImageDraw, ImageFont
+
+from copienator import (
+    EvaluationWorkspace,
+    ExitCode,
+    atomic_write_json,
+    evaluation_parser,
+    execute,
+    workspace_from_args,
+)
 
 # Configuration
 DPI = 200  # Good balance for readability and size
@@ -34,7 +43,7 @@ def get_pdf_height(path):
 
         # Return total height
         return single_page_px * num_pages
-    except Exception as e:
+    except Exception as e:  # noqa: BLE001 - pdfinfo may raise backend-specific errors
         print(f"Error reading {path}: {e}")
         return 0
 
@@ -78,7 +87,7 @@ def group_files(file_list):
     groups = []
 
     for item in sorted_files:
-        dd, path, height = item
+        _, _, height = item
         placed = False
 
         # 2. Try to fit item into an existing group (First Fit)
@@ -140,7 +149,7 @@ def create_jpg(identifier, group_index, group, root_dir):
                 combined_img = stitch_pdf_pages(imgs)
                 if combined_img:
                     images.append((dd, combined_img))
-        except Exception as e:
+        except Exception as e:  # noqa: BLE001 - PDF/image backends vary by platform
             print(f"Failed to convert {path}: {e}")
 
     if not images:
@@ -159,7 +168,7 @@ def create_jpg(identifier, group_index, group, root_dir):
     # Try loading a font, fallback to default
     try:
         font = ImageFont.truetype("DejaVuSans.ttf", 40)
-    except IOError:
+    except OSError:
         print("font not found")
         font = ImageFont.load_default()
 
@@ -193,8 +202,7 @@ def create_jpg(identifier, group_index, group, root_dir):
     # Save JSON metadata
     json_filename = f"Group_{group_index+1}.json"
     json_path = os.path.join(target_folder, json_filename)
-    with open(json_path, 'w') as f:
-        json.dump(metadata, f)
+    atomic_write_json(json_path, metadata, indent=None)
 
     # Save with size constraints
     output_filename = f"Group_{group_index+1}.jpg"
@@ -227,18 +235,16 @@ def process_identifier(identifier, files_info, output_dir):
     for idx, group in enumerate(file_groups):
         create_jpg(identifier, idx, group, output_dir)
 
-def main():
-    if len(sys.argv) < 2:
-        print("Usage: python app.py <Path_to_Dir>")
-        sys.exit(1)
+def build_parser() -> argparse.ArgumentParser:
+    return evaluation_parser("Group copy extracts by question label.")
 
-    root_dir = Path(sys.argv[1])
 
-    copies_dir = root_dir / "Copies"
-    par_label_dir = root_dir / "Par label"
+def run(workspace: EvaluationWorkspace) -> ExitCode:
+    workspace.require_directories("Copies")
+    workspace.groups_dir.mkdir(parents=True, exist_ok=True)
 
     print("Scanning files...")
-    data = collect_files(copies_dir)
+    data = collect_files(workspace.copies_dir)
 
     print(f"Found {len(data)} identifiers. Processing...")
 
@@ -247,11 +253,25 @@ def main():
 
     # Process using 8 threads
     with ThreadPoolExecutor(max_workers=8) as executor:
-        for identifier in sorted_identifiers:
-            executor.submit(process_identifier, identifier, data[identifier],
-                            par_label_dir)
+        futures = [
+            executor.submit(
+                process_identifier,
+                identifier,
+                data[identifier],
+                workspace.groups_dir,
+            )
+            for identifier in sorted_identifiers
+        ]
+        for future in futures:
+            future.result()
 
     print("Done.")
+    return ExitCode.SUCCESS
+
+
+def main(argv: Sequence[str] | None = None) -> int:
+    parser = build_parser()
+    return execute(parser, argv, lambda args: run(workspace_from_args(args)))
 
 if __name__ == "__main__":
-    main()
+    raise SystemExit(main())
diff --git a/import.py b/import.py
index aa16106..8827562 100644
--- a/import.py
+++ b/import.py
@@ -1,43 +1,65 @@
-import sys
+import argparse
 import shutil
+import sys
+from collections.abc import Sequence
 from pathlib import Path
 
 from config import IMPORT_DIR
+from copienator import (
+    EvaluationWorkspace,
+    ExitCode,
+    evaluation_parser,
+    execute,
+    workspace_from_args,
+)
 
-def sync_annotated(dir_arg, refaire):
-    if not refaire:
-        bgnot_dir = Path(dir_arg) / "BGnot"
-    else:
-        bgnot_dir = Path(dir_arg) / "BRnot"
-
-    annotated_dir = IMPORT_DIR
 
+def sync_annotated(
+    workspace: EvaluationWorkspace,
+    *,
+    refaire: bool = False,
+    import_dir: Path,
+) -> ExitCode:
+    annotation_name = "BRnot" if refaire else "BGnot"
+    workspace.require_directories(annotation_name)
+    annotation_dir = workspace.root / annotation_name
+    annotated_dir = Path(import_dir).expanduser()
     if not annotated_dir.is_dir():
-        print(f"Error: Directory {annotated_dir} does not exist.")
-        return
+        print(f"Error: directory does not exist: {annotated_dir}", file=sys.stderr)
+        return ExitCode.INVALID_WORKSPACE
 
-    # Iterate over all PDF files in the annotated directory
+    missing_targets = 0
     for pdf_file in annotated_dir.glob("*.pdf"):
-        subdir_name = pdf_file.stem # 'f' from 'f.pdf'
-        target_subdir = bgnot_dir / subdir_name
+        target_subdir = annotation_dir / pdf_file.stem
 
         if not target_subdir.is_dir():
-            print(f"Warning: Directory {target_subdir} not found.")
+            print(f"Warning: directory not found: {target_subdir}", file=sys.stderr)
+            missing_targets += 1
         else:
             dest_file = target_subdir / "Concat_annotated.pdf"
-            print("copying ", pdf_file, " to ", dest_file)
+            print(f"Copying {pdf_file} to {dest_file}")
             shutil.copy2(pdf_file, dest_file)
+    return ExitCode.PARTIAL if missing_targets else ExitCode.SUCCESS
 
-import argparse
+
+def build_parser() -> argparse.ArgumentParser:
+    parser = evaluation_parser("Import handwritten annotations from the tablet directory.")
+    parser.add_argument("--refaire", action="store_true", help="Process only copies/labels defined in refaire.json")
+    return parser
+
+
+def run(workspace: EvaluationWorkspace, *, refaire: bool = False) -> ExitCode:
+    return sync_annotated(workspace, refaire=refaire, import_dir=Path(IMPORT_DIR))
+
+
+def main(argv: Sequence[str] | None = None) -> int:
+    parser = build_parser()
+    return execute(
+        parser,
+        argv,
+        lambda args: run(workspace_from_args(args), refaire=args.refaire),
+    )
 
 
 if __name__ == "__main__":
-
-    parser = argparse.ArgumentParser(description="Move to tablette folder.")
-    parser.add_argument("dir", help="The directory to process")
-    parser.add_argument("--refaire", action="store_true", help="Process only copies/labels defined in refaire.json")
-
-    args = parser.parse_args()
-    root_dir = args.dir
-
-    sync_annotated(root_dir, args.refaire)
+    raise SystemExit(main())
diff --git a/tests/test_gui_core.py b/tests/test_gui_core.py
index 72dd914..7f62b48 100644
--- a/tests/test_gui_core.py
+++ b/tests/test_gui_core.py
@@ -1,5 +1,7 @@
 from __future__ import annotations
 
+import importlib.util
+import io
 import os
 import queue
 import sys
@@ -7,6 +9,7 @@ import tempfile
 import time
 import unittest
 from concurrent.futures import ThreadPoolExecutor
+from contextlib import redirect_stderr
 from pathlib import Path
 from unittest.mock import patch
 
@@ -20,6 +23,7 @@ from copienator import (
     atomic_write_json,
     read_json,
 )
+from copienator_gui.app import process_status
 from copienator_gui.diagnostics import collect_diagnostics
 from copienator_gui.runner import ProcessRunner
 from copienator_gui.state import StateStore
@@ -36,6 +40,15 @@ from platform_utils import (
 REPOSITORY = Path(__file__).resolve().parents[1]
 
 
+def load_script_module(filename: str, module_name: str):
+    spec = importlib.util.spec_from_file_location(module_name, REPOSITORY / filename)
+    if spec is None or spec.loader is None:
+        raise RuntimeError(f"Could not load {filename}")
+    module = importlib.util.module_from_spec(spec)
+    spec.loader.exec_module(module)
+    return module
+
+
 class WorkspaceTests(unittest.TestCase):
     def test_canonical_paths_and_no_constructor_side_effects(self) -> None:
         with tempfile.TemporaryDirectory() as directory:
@@ -73,6 +86,10 @@ class WorkspaceTests(unittest.TestCase):
                 workspace.require("enonce.pdf", "labels")
             self.assertEqual(context.exception.missing, ["enonce.pdf", "labels"])
 
+            (root / "Copies").write_text("not a directory", encoding="utf-8")
+            with self.assertRaises(WorkspaceValidationError):
+                workspace.require_directories("Copies")
+
     def test_names_file_prefers_evaluation_then_repository(self) -> None:
         with tempfile.TemporaryDirectory() as directory:
             repository = Path(directory)
@@ -134,6 +151,143 @@ class AtomicJsonTests(unittest.TestCase):
             self.assertEqual(persisted["steps"]["labels"]["status"], "success")
 
 
+class StandardCliTests(unittest.TestCase):
+    @classmethod
+    def setUpClass(cls) -> None:
+        cls.modules = {
+            "export": load_script_module("export.py", "copienator_export_test"),
+            "import": load_script_module("import.py", "copienator_import_test"),
+            "giving_names": load_script_module(
+                "giving_names.py", "copienator_giving_names_test"
+            ),
+            "grouping": load_script_module("grouping.py", "copienator_grouping_test"),
+        }
+
+    def test_missing_evaluation_has_standard_exit_code(self) -> None:
+        with tempfile.TemporaryDirectory() as directory:
+            missing = str(Path(directory) / "missing")
+            invocations = {
+                "export": [missing],
+                "import": [missing],
+                "giving_names": [missing, "BGnot"],
+                "grouping": [missing],
+            }
+            for name, arguments in invocations.items():
+                with self.subTest(script=name), redirect_stderr(io.StringIO()):
+                    self.assertEqual(self.modules[name].main(arguments), 3)
+
+    def test_invalid_arguments_use_argparse_exit_code(self) -> None:
+        with redirect_stderr(io.StringIO()), self.assertRaises(SystemExit) as context:
+            self.modules["grouping"].main([])
+        self.assertEqual(context.exception.code, 2)
+
+    def test_unexpected_processing_error_has_failure_exit_code(self) -> None:
+        module = self.modules["grouping"]
+        with tempfile.TemporaryDirectory() as directory:
+            with patch.object(
+                module, "run", side_effect=RuntimeError("broken")
+            ), redirect_stderr(io.StringIO()) as errors:
+                self.assertEqual(module.main([directory]), 1)
+            self.assertIn("broken", errors.getvalue())
+
+    def test_prerequisites_are_checked_before_creating_outputs(self) -> None:
+        module = self.modules["export"]
+        with tempfile.TemporaryDirectory() as directory:
+            base = Path(directory)
+            evaluation = base / "Exam"
+            evaluation.mkdir()
+            export_dir = base / "Export"
+            with patch.object(module, "EXPORT_DIR", export_dir), redirect_stderr(
+                io.StringIO()
+            ):
+                self.assertEqual(module.main([str(evaluation)]), 3)
+            self.assertFalse(export_dir.exists())
+
+    def test_gui_understands_standard_process_exit_codes(self) -> None:
+        self.assertEqual(process_status(0), "success")
+        self.assertEqual(process_status(1), "failed")
+        self.assertEqual(process_status(3), "failed")
+        self.assertEqual(process_status(4), "partial")
+        self.assertEqual(process_status(130), "interrupted")
+        self.assertEqual(process_status(0, interrupted=True), "interrupted")
+
+    def test_gui_commands_are_accepted_by_script_parsers(self) -> None:
+        steps = {step.id: step for step in build_workflow(True)}
+        evaluation = "Evaluation with spaces"
+        cases = {
+            "export": ("export", "default", {"target": evaluation, "refaire": True}),
+            "import": ("import", "default", {"target": evaluation, "refaire": True}),
+            "giving_names": (
+                "giving_names",
+                "default",
+                {"target": evaluation, "annotation_dir": "BGnot"},
+            ),
+            "grouping": ("grouping", "default", {"target": evaluation}),
+        }
+        for module_name, (step_id, variant_id, values) in cases.items():
+            step = steps[step_id]
+            variant = next(item for item in step.variants if item.id == variant_id)
+            command = build_command(REPOSITORY, step, variant, values, evaluation)
+            with self.subTest(script=module_name):
+                parsed = self.modules[module_name].build_parser().parse_args(command[3:])
+                self.assertEqual(str(parsed.evaluation), evaluation)
+
+    def test_export_main_copies_outputs(self) -> None:
+        module = self.modules["export"]
+        with tempfile.TemporaryDirectory() as directory:
+            base = Path(directory)
+            evaluation = base / "Exam"
+            source = evaluation / "BGnot" / "Ex 1"
+            source.mkdir(parents=True)
+            (source / "Concat.pdf").write_bytes(b"annotated")
+            with patch.object(module, "EXPORT_DIR", base / "Export"):
+                self.assertEqual(module.main([str(evaluation)]), 0)
+            exported = base / "Export" / "Exam" / "Ex 1.pdf"
+            self.assertEqual(exported.read_bytes(), b"annotated")
+
+    def test_import_main_copies_handwritten_annotations(self) -> None:
+        module = self.modules["import"]
+        with tempfile.TemporaryDirectory() as directory:
+            base = Path(directory)
+            evaluation = base / "Exam"
+            target = evaluation / "BGnot" / "Ex 1"
+            target.mkdir(parents=True)
+            import_dir = base / "Import"
+            import_dir.mkdir()
+            (import_dir / "Ex 1.pdf").write_bytes(b"handwritten")
+            with patch.object(module, "IMPORT_DIR", import_dir):
+                self.assertEqual(module.main([str(evaluation)]), 0)
+            self.assertEqual(
+                (target / "Concat_annotated.pdf").read_bytes(), b"handwritten"
+            )
+
+    def test_giving_names_main_builds_return_directory(self) -> None:
+        module = self.modules["giving_names"]
+        with tempfile.TemporaryDirectory() as directory:
+            evaluation = Path(directory) / "Exam"
+            copies = evaluation / "Copies"
+            annotations = evaluation / "BGnot" / "Copie01"
+            copies.mkdir(parents=True)
+            annotations.mkdir(parents=True)
+            atomic_write_json(copies / "Copie01.json", {"name": "Élève Test"})
+            atomic_write_json(annotations / "score.json", {"total": 10})
+            (annotations / "Concat.jpg").write_bytes(b"image")
+            (evaluation / "names").write_text("Élève Test\n", encoding="utf-8")
+
+            self.assertEqual(module.main([str(evaluation), "BGnot"]), 0)
+            destination = evaluation / "A Rendre" / "Élève Test (01)"
+            self.assertEqual((destination / "Élève Test.jpg").read_bytes(), b"image")
+            self.assertEqual(read_json(destination / "score.json"), {"total": 10})
+
+    def test_grouping_main_accepts_empty_copies_directory(self) -> None:
+        module = self.modules["grouping"]
+        with tempfile.TemporaryDirectory() as directory:
+            evaluation = Path(directory) / "Exam"
+            (evaluation / "Copies").mkdir(parents=True)
+            self.assertEqual(module.main([str(evaluation)]), 0)
+            self.assertTrue((evaluation / "Par label").is_dir())
+
+
 class WorkflowTests(unittest.TestCase):
     def setUp(self) -> None:
         self.steps = {step.id: step for step in build_workflow(True)}