diff --git a/streetup/common/apps.py b/streetup/common/apps.py
index fc9a8bd..be8d2e7 100644
--- a/streetup/common/apps.py
+++ b/streetup/common/apps.py
@@ -10,3 +10,9 @@ class CommonConfig(AppConfig):
         from django.contrib.auth.signals import user_logged_in
         from .middleware import set_login_time
         user_logged_in.connect(set_login_time)
+
+        # Charger les extensions conditionnelles
+        try:
+            from common import bm_extensions
+        except ImportError:
+            pass
diff --git a/streetup/common/hooks.py b/streetup/common/hooks.py
new file mode 100644
index 0000000..983ae00
--- /dev/null
+++ b/streetup/common/hooks.py
@@ -0,0 +1,106 @@
+from django.db.models import Q
+
+class ExtensionHooks:
+    def __init__(self):
+        self._form_cleaners = []
+        self._search_annotators = []
+        self._search_filters = []
+        self._pdf_fields_extractors = []
+        self._export_headers = []
+        self._export_row_extractors = []
+        self._custom_allowed_fields = []
+        self._custom_export_fields = []
+        self._inline_validators = []
+        self._custom_source_ref_value_extractor = None
+
+    def register_custom_source_ref_value_extractor(self, func):
+        self._custom_source_ref_value_extractor = func
+        return func
+
+    def get_custom_source_ref_value(self, intervention):
+        if self._custom_source_ref_value_extractor:
+            return self._custom_source_ref_value_extractor(intervention)
+        return None
+
+    def register_custom_export_field(self, label, extractor):
+        self._custom_export_fields.append((label, extractor))
+        return (label, extractor)
+
+    def get_custom_export_fields(self):
+        return self._custom_export_fields
+
+    def register_inline_validator(self, func):
+        self._inline_validators.append(func)
+        return func
+
+    def run_inline_edit_validator(self, field, new_value, intervention):
+        for validator in self._inline_validators:
+            res = validator(field, new_value, intervention)
+            if res[0] is not None:
+                return res
+        return (None, None)
+
+    def register_form_cleaner(self, func):
+        self._form_cleaners.append(func)
+        return func
+
+    def register_search_annotator(self, func):
+        self._search_annotators.append(func)
+        return func
+
+    def register_search_filter(self, func):
+        self._search_filters.append(func)
+        return func
+
+    def register_pdf_fields_extractor(self, func):
+        self._pdf_fields_extractors.append(func)
+        return func
+
+    def register_export_headers(self, headers_list):
+        self._export_headers.extend(headers_list)
+
+    def register_export_row_extractor(self, func):
+        self._export_row_extractors.append(func)
+        return func
+
+    def register_custom_allowed_field(self, field_name_or_list):
+        if isinstance(field_name_or_list, list):
+            self._custom_allowed_fields.extend(field_name_or_list)
+        else:
+            self._custom_allowed_fields.append(field_name_or_list)
+
+    def run_form_cleaners(self, form, cleaned_data):
+        for cleaner in self._form_cleaners:
+            cleaned_data = cleaner(form, cleaned_data)
+        return cleaned_data
+
+    def apply_search_annotations(self, queryset):
+        for annotator in self._search_annotators:
+            queryset = annotator(queryset)
+        return queryset
+
+    def get_search_filters(self, word):
+        q_obj = Q()
+        for filter_func in self._search_filters:
+            q_obj |= filter_func(word)
+        return q_obj
+
+    def extract_pdf_fields(self, intervention):
+        fields = []
+        for extractor in self._pdf_fields_extractors:
+            fields.extend(extractor(intervention))
+        return fields
+
+    def get_export_headers(self):
+        return self._export_headers
+
+    def extract_export_row(self, intervention):
+        row_data = []
+        for extractor in self._export_row_extractors:
+            row_data.extend(extractor(intervention))
+        return row_data
+
+    def get_custom_allowed_fields(self):
+        return self._custom_allowed_fields
+
+hooks = ExtensionHooks()
diff --git a/streetup/contracts/views_daily_report.py b/streetup/contracts/views_daily_report.py
index e2af144..8bfd9a3 100644
--- a/streetup/contracts/views_daily_report.py
+++ b/streetup/contracts/views_daily_report.py
@@ -106,10 +106,13 @@ def _collect_report_data(companies, report_date):
     # Colonnes
     COL_KEYS = [
         'damage', 'defect', 'demand',
-        'observation', 'prego',
-        'finished', 'other_status',
-        'total',
+        'observation',
     ]
+    dynamic_cols = getattr(settings, 'DAILY_REPORT_SOURCE_COLUMNS', {})
+    for key in dynamic_cols.keys():
+        if key not in COL_KEYS:
+            COL_KEYS.append(key)
+    COL_KEYS.extend(['finished', 'other_status', 'total'])
 
     by_thematic = defaultdict(lambda: {k: 0 for k in COL_KEYS})
     by_person = defaultdict(int)
@@ -142,9 +145,9 @@ def _collect_report_data(companies, report_date):
             if sc_name == 'observation':
                 row['observation'] += 1
                 totals['observation'] += 1
-            elif sc_name == 'prego':
-                row['prego'] += 1
-                totals['prego'] += 1
+            elif sc_name in dynamic_cols:
+                row[sc_name] += 1
+                totals[sc_name] += 1
 
         # --- Statut ---
         if itv.status_order  >= STATUS_ORDERS['finished']:
@@ -179,26 +182,37 @@ COLUMN_HEADERS = [
     ('defect',       'Défaut/Panne'),
     ('demand',       'Demande'),
     ('observation',  'StreetUp'),
-    ('prego',        'Issu de Prego'),
+]
+
+# Add dynamic source columns from settings
+dynamic_cols = getattr(settings, 'DAILY_REPORT_SOURCE_COLUMNS', {})
+for key, cfg in dynamic_cols.items():
+    COLUMN_HEADERS.append((key, cfg['label']))
+
+COLUMN_HEADERS.extend([
     ('finished',     'Résolu'),
     ('other_status', 'En cours'),
     ('total',        'Total'),
-]
+])
 
 # Couleurs spéciales (R, G, B) pour l'en-tête et la ligne totale de certaines colonnes
 # Les colonnes absentes de ce dict héritent de la couleur par défaut.
 COLUMN_SPECIAL_COLORS_RGB = {
-    'prego':        (255, 102,   0),   # Orange
     'finished':     (112, 173,  71),   # Vert
     'other_status': (  0, 176, 240),   # Bleu ciel
 }
 # Version hex pour Excel (AARRGGBB sans alpha, format RRGGBB)
 COLUMN_SPECIAL_COLORS_HEX = {
-    'prego':        'FF6600',
     'finished':     '70AD47',
     'other_status': '00B0F0',
 }
 
+for key, cfg in dynamic_cols.items():
+    if 'color_rgb' in cfg:
+        COLUMN_SPECIAL_COLORS_RGB[key] = cfg['color_rgb']
+    if 'color_hex' in cfg:
+        COLUMN_SPECIAL_COLORS_HEX[key] = cfg['color_hex']
+
 
 # ---------------------------------------------------------------------------
 #  PDF generation
diff --git a/streetup/interventions/models.py b/streetup/interventions/models.py
index 58cd002..d3678c7 100644
--- a/streetup/interventions/models.py
+++ b/streetup/interventions/models.py
@@ -353,8 +353,6 @@ class Intervention(models.Model):
     source_category = models.ForeignKey(SourceCategory, on_delete=models.SET_NULL, null=True, blank=True)
     source_detail = models.CharField(null=True,blank=True)
     source_ref = models.CharField(null=True,blank=True)
-    origin_prego_nbr = models.IntegerField(null=True, blank=True)
-    origin_fms_nbr = models.IntegerField(null=True, blank=True)
     pmo_number = models.IntegerField(null=True, blank=True, verbose_name=_("Numéro PMO"))
     asset_category = models.ForeignKey(AssetCategory, on_delete=models.SET_NULL, null=True, blank=True)
     symptom = models.ForeignKey(Symptom, on_delete=models.SET_NULL, null=True, blank=True)
diff --git a/streetup/interventions/permissions.py b/streetup/interventions/permissions.py
index cc273d6..9b25eb5 100644
--- a/streetup/interventions/permissions.py
+++ b/streetup/interventions/permissions.py
@@ -427,7 +427,9 @@ def get_allowed_update_fields(user, intervention):
 
     # Source, Référence, Détail, FMS, Type d'origine et Symptôme
     if intervention.status_order < STATUS_ORDERS.get('to_be_processed') and user_config.is_intern:
-        allowed_fields.update(['source_category', 'source_ref', 'source_detail', 'origin_fms_nbr', 'origin_type', 'symptom'])
+        allowed_fields.update(['source_category', 'source_ref', 'source_detail', 'origin_type', 'symptom'])
+        from common.hooks import hooks
+        allowed_fields.update(hooks.get_custom_allowed_fields())
 
     # Priorité : modifiable par les internes tant que le statut n'est pas 'démarré' (in_progress)
     if intervention.status_order < STATUS_ORDERS.get('in_progress') and user_config.is_intern:
diff --git a/streetup/interventions/services/export_service.py b/streetup/interventions/services/export_service.py
index d2f3293..22596ae 100644
--- a/streetup/interventions/services/export_service.py
+++ b/streetup/interventions/services/export_service.py
@@ -108,48 +108,55 @@ def generate_interventions_excel(start_date=None, end_date=None, output_format='
     ws = wb.active
     ws.title = "Interventions"
     
-    # Définir les en-têtes
-    headers = [
-        'Code',
-        'Titre',
-        'Date de création',
-        'Date de transmission',
-        'Date début prévue',
-        'Date fin prévue',
-        'Date début planifiée',
-        'Date fin planifiée',
-        'Date de début',
-        'Date de fin',
-        'Date appel initial confirmé',
-        'Type d\'origine',
-        'Priorité',
-        'Statut',
-        'Symptôme',
-        'Contrat',
-        'Source catégorie',
-        'Numéro PREGO',
-        'Numéro FMS',
-        'Documents joints',
-        'Notes',
-        'Créé par',
-        'Équipe (créateur)',
-        'Thématique (code)',
-        'Thématique (nom)',
-        'Commune',
-        'Localisation code 1',
-        'Localisation label 1',
-        'Localisation code 2',
-        'Localisation label 2',
-        'Localisation code 3',
-        'Localisation label 3',
-        'Localisation code 4',
-        'Localisation label 4',
-        'Catégorie (code)',
-        'Catégorie (nom)',
-        'Modèle (code)',
-        'Modèle (nom)',
+    # Définir les en-têtes et les largeurs de colonne de manière dynamique
+    column_definitions = [
+        ('Code', 15),
+        ('Titre', 30),
+        ('Date de création', 20),
+        ('Date de transmission', 20),
+        ('Date début prévue', 20),
+        ('Date fin prévue', 20),
+        ('Date début planifiée', 20),
+        ('Date fin planifiée', 20),
+        ('Date de début', 20),
+        ('Date de fin', 20),
+        ('Date appel initial confirmé', 20),
+        ('Type d\'origine', 15),
+        ('Priorité', 12),
+        ('Statut', 15),
+        ('Symptôme', 30),
+        ('Contrat', 30),
+        ('Source catégorie', 20),
     ]
     
+    from common.hooks import hooks
+    for header in hooks.get_export_headers():
+        column_definitions.append((header, 15))
+        
+    column_definitions.extend([
+        ('Documents joints', 50),
+        ('Notes', 50),
+        ('Créé par', 20),
+        ('Équipe (créateur)', 25),
+        ('Thématique (code)', 15),
+        ('Thématique (nom)', 25),
+        ('Commune', 20),
+        ('Localisation code 1', 15),
+        ('Localisation label 1', 25),
+        ('Localisation code 2', 15),
+        ('Localisation label 2', 25),
+        ('Localisation code 3', 15),
+        ('Localisation label 3', 25),
+        ('Localisation code 4', 15),
+        ('Localisation label 4', 25),
+        ('Equipement code', 15),
+        ('Equipement nom', 25),
+        ('Modèle code', 15),
+        ('Modèle nom', 30),
+    ])
+
+    headers = [col[0] for col in column_definitions]
+    
     # Écrire les en-têtes avec style
     for col_num, header in enumerate(headers, 1):
         cell = ws.cell(row=1, column=col_num)
@@ -159,49 +166,10 @@ def generate_interventions_excel(start_date=None, end_date=None, output_format='
         cell.alignment = Alignment(horizontal="center", vertical="center")
     
     # Ajuster la largeur des colonnes
-    column_widths = {
-        'A': 15,  # Code
-        'B': 40,  # Titre
-        'C': 20,  # Date création
-        'D': 20,  # Date transmission
-        'E': 20,  # Date début prévue
-        'F': 20,  # Date fin prévue
-        'G': 20,  # Date début planifiée
-        'H': 20,  # Date fin planifiée
-        'I': 20,  # Date début
-        'J': 20,  # Date fin
-        'K': 20,  # Date appel initial confirmé
-        'L': 15,  # Type origine
-        'M': 12,  # Priorité
-        'N': 15,  # Statut
-        'O': 30,  # Symptôme
-        'P': 30,  # Contrat
-        'Q': 20,  # Source catégorie
-        'R': 15,  # PREGO
-        'S': 15,  # FMS
-        'T': 50,  # Documents joints
-        'U': 50,  # Notes
-        'V': 20,  # Créé par
-        'W': 25,  # Équipe (créateur)
-        'X': 15,  # Thématique code
-        'Y': 25,  # Thématique nom
-        'Z': 20,  # Commune
-        'AA': 15, # Loc code 1
-        'AB': 25, # Loc label 1
-        'AC': 15, # Loc code 2
-        'AD': 25, # Loc label 2
-        'AE': 15, # Loc code 3
-        'AF': 25, # Loc label 3
-        'AG': 15, # Loc code 4
-        'AH': 25, # Loc label 4
-        'AI': 15, # Cat code
-        'AJ': 25, # Cat nom
-        'AK': 15, # Model code
-        'AL': 30, # Model nom
-    }
-    
-    for col, width in column_widths.items():
-        ws.column_dimensions[col].width = width
+    from openpyxl.utils import get_column_letter
+    for i, col_def in enumerate(column_definitions, start=1):
+        col_letter = get_column_letter(i)
+        ws.column_dimensions[col_letter].width = col_def[1]
     
     # Forcer la langue française pour l'export
     with override('fr'):
@@ -348,8 +316,7 @@ def generate_interventions_excel(start_date=None, end_date=None, output_format='
                 symptom_name,
                 contrat_info,
                 source_category_name,
-                intervention.origin_prego_nbr or '',
-                intervention.origin_fms_nbr or '',
+                *hooks.extract_export_row(intervention),
                 documents_str,
                 notes_str,
                 created_by,
diff --git a/streetup/interventions/static/interventions/add/source.js b/streetup/interventions/static/interventions/add/source.js
index 9703d77..280bcf1 100644
--- a/streetup/interventions/static/interventions/add/source.js
+++ b/streetup/interventions/static/interventions/add/source.js
@@ -1,147 +1,54 @@
 document.addEventListener('DOMContentLoaded', function () {
     const sourceCategorySelect = document.getElementById('id_source_category');
     const sourceDetailContainer = document.getElementById('source-detail-container');
-    const sourceRefContainer = document.getElementById('source-ref-container'); // PREGO
-    const sourceRefGenericContainer = document.getElementById('source-ref-generic-container'); // OBSERVATION
-    const sourceRefInput = document.getElementById('id_source_ref');
-    const noFmsCheckbox = document.getElementById('id_no_origin_fms');
-    const fmsInput = document.getElementById('id_origin_fms_nbr');
+    const sourceRefContainer = document.getElementById('source-ref-container');
 
-    // Fonction pour afficher/masquer le champ détail de la source
-    function toggleSourceDetail() {
+    function handleSourceChange() {
+        if (!sourceCategorySelect) return;
         const selectedValue = sourceCategorySelect.value;
-        // Rechercher la catégorie sélectionnée dans sourceCategoriesData
-        const selectedCategory = sourceCategoriesData.find(sc => sc.id == selectedValue);
+        const selectedOption = sourceCategorySelect.options[sourceCategorySelect.selectedIndex];
+        const selectedText = selectedOption ? selectedOption.text : '';
         
-        if (selectedCategory && selectedCategory.has_reference && !['PREGO','OBSERVATION','OBSERVATIE'].includes(selectedCategory.name)) {
-            sourceDetailContainer.classList.remove('d-none'); // Afficher
-        } else {
-            sourceDetailContainer.classList.add('d-none'); // Masquer
+        let selectedCategory = null;
+        if (typeof sourceCategoriesData !== 'undefined' && Array.isArray(sourceCategoriesData)) {
+            selectedCategory = sourceCategoriesData.find(sc => sc.id == selectedValue);
+        }
+
+        // Dispatch a CustomEvent for forks (like Bruxelles Mobilité) to run custom logic
+        const event = new CustomEvent('streetup:source-changed', {
+            detail: {
+                value: selectedValue,
+                text: selectedText,
+                category: selectedCategory
+            }
+        });
+        document.dispatchEvent(event);
+
+        // Standard core behavior:
+        // 1. Toggle source detail visibility
+        if (sourceDetailContainer) {
+            if (selectedCategory && selectedCategory.has_reference) {
+                // If it is observation, the core template has it as read-only.
+                // We show detail container if category requires detail and has no reference.
+                // Normally, we show detail if has_reference is true.
+                sourceDetailContainer.classList.remove('d-none');
+            } else {
+                sourceDetailContainer.classList.add('d-none');
+            }
+        }
+
+        // 2. Toggle source reference container visibility
+        if (sourceRefContainer) {
+            if (selectedCategory && selectedCategory.has_reference) {
+                sourceRefContainer.classList.remove('d-none');
+            } else {
+                sourceRefContainer.classList.add('d-none');
+            }
         }
     }
 
-    // Fonction pour afficher/masquer le champ référence de la source
-    function syncNoFmsState() {
-        if (!noFmsCheckbox || !fmsInput) {
-            return;
-        }
-
-        if (noFmsCheckbox.checked) {
-            fmsInput.value = '';
-            fmsInput.setAttribute('disabled', 'disabled');
-        } else {
-            fmsInput.removeAttribute('disabled');
-        }
+    if (sourceCategorySelect) {
+        handleSourceChange();
+        sourceCategorySelect.addEventListener('change', handleSourceChange);
     }
-    function toggleSourceRef() {
-        const selectedText = sourceCategorySelect.options[sourceCategorySelect.selectedIndex].text || '';
-        const selectedUpper = selectedText.trim().toUpperCase();
-        const mntPrefix = document.getElementById('mnt-prefix');
-        const pregoInput = document.getElementById('id_origin_prego_nbr');
-
-        // Reset visibility by default
-        if (sourceRefContainer) sourceRefContainer.classList.add('d-none');
-        if (sourceRefGenericContainer) sourceRefGenericContainer.classList.add('d-none');
-        if (mntPrefix) mntPrefix.style.display = 'none';
-        if (sourceRefInput) {
-            sourceRefInput.removeAttribute('readonly');
-            sourceRefInput.classList.remove('bg-light');
-            sourceRefInput.setAttribute('title', '');
-            sourceRefInput.removeAttribute('aria-readonly');
-        }
-
-        // PREGO -> show PREGO block with MNT prefix + FMS
-        if (selectedUpper === 'PREGO') {
-            if (sourceRefContainer) sourceRefContainer.classList.remove('d-none');
-            if (mntPrefix) mntPrefix.style.display = 'inline-block';
-
-            if (pregoInput) {
-                pregoInput.setAttribute('pattern', '\\d{1,6}');
-                pregoInput.setAttribute('maxlength', '6');
-                pregoInput.setAttribute('title', gettext('Veuillez entrer un entier de maximum 6 chiffres'));
-                pregoInput.addEventListener('input', function () {
-                    this.value = this.value.replace(/\D/g, '').slice(0, 6);
-                });
-            }
-            if (fmsInput) {
-                fmsInput.removeAttribute('disabled');
-                fmsInput.setAttribute('pattern', '\\d{1,9}');
-                fmsInput.setAttribute('maxlength', '9');
-                fmsInput.addEventListener('input', function () {
-                    this.value = this.value.replace(/\D/g, '').slice(0, 9);
-                });
-            }
-        }
-        // OBSERVATION (FR/NL) -> show generic source_ref only
-        else if (selectedUpper === 'OBSERVATION' || selectedUpper === 'OBSERVATIE') {
-            if (sourceRefGenericContainer) sourceRefGenericContainer.classList.remove('d-none');
-            // Make the reference read-only but still submitted
-            if (sourceRefInput) {
-                sourceRefInput.setAttribute('readonly', 'readonly');
-                sourceRefInput.setAttribute('aria-readonly', 'true');
-                // subtle visual cue it cannot be edited
-                sourceRefInput.classList.add('bg-light');
-                const v = sourceRefInput.value || '';
-                if (v) {
-                    sourceRefInput.setAttribute('title', gettext('Référence non modifiable'));                
-                }
-            }
-
-            // Clean PREGO/FMS constraints
-            if (pregoInput) {
-                pregoInput.removeAttribute('pattern');
-                pregoInput.removeAttribute('maxlength');
-                pregoInput.removeAttribute('title');
-            }
-            if (fmsInput) {
-                fmsInput.value = '';
-                fmsInput.setAttribute('disabled', 'disabled');
-                fmsInput.removeAttribute('pattern');
-                fmsInput.removeAttribute('maxlength');
-            }
-            if (noFmsCheckbox) {
-                noFmsCheckbox.checked = false;
-            }
-        }
-        // Others -> nothing specific
-        else {
-            // ensure PREGO constraints removed
-            if (pregoInput) {
-                pregoInput.removeAttribute('pattern');
-                pregoInput.removeAttribute('maxlength');
-                pregoInput.removeAttribute('title');
-            }
-            if (fmsInput) {
-                fmsInput.removeAttribute('disabled');
-                fmsInput.removeAttribute('pattern');
-                fmsInput.removeAttribute('maxlength');
-            }
-            if (noFmsCheckbox) {
-                noFmsCheckbox.checked = false;
-            }
-        }
-
-        syncNoFmsState();
-    }
-    
-    // Exécuter une première fois si besoin à l'initialisation :
-    if (sourceCategorySelect !== null) {
-        toggleSourceDetail();
-        toggleSourceRef();
-        // Événement pour surveiller les changements sur le champ Catgégorie de la source
-        sourceCategorySelect.addEventListener('change', toggleSourceDetail);
-        sourceCategorySelect.addEventListener('change', toggleSourceRef);
-    }
-    
-    if (noFmsCheckbox) {
-        noFmsCheckbox.addEventListener('change', syncNoFmsState);
-    }
-    
-
-
-
-
-    window.toggleSourceDetail = toggleSourceDetail;
-    window.syncNoFmsState = syncNoFmsState;
-    window.toggleSourceRef = toggleSourceRef;
 });
diff --git a/streetup/interventions/static/interventions/add/validation.js b/streetup/interventions/static/interventions/add/validation.js
index f5c1c73..a754cbe 100644
--- a/streetup/interventions/static/interventions/add/validation.js
+++ b/streetup/interventions/static/interventions/add/validation.js
@@ -179,52 +179,11 @@ document.addEventListener('DOMContentLoaded', function () {
                 });
             }
 
-        // --- Règles spécifiques à la source PREGO ---
-        const sourceSel = document.getElementById('id_source_category');
-        const pregoEl   = document.getElementById('id_origin_prego_nbr');
-        const fmsEl     = document.getElementById('id_origin_fms_nbr');
-        const noFmsEl   = document.getElementById('id_no_origin_fms');
-        const docsEl    = document.getElementById('id_documents');
-
-        const isPrego = (() => {
-            if (!sourceSel) return false;
-            const opt = sourceSel.options[sourceSel.selectedIndex];
-            const val = (opt?.value || '').trim().toLowerCase();
-            const txt = (opt?.text  || '').trim().toLowerCase();
-            return val === 'prego' || txt === 'prego';
-        })();
-
-        if (isPrego) {
-            // 1️⃣ Numéro PREGO obligatoire
-            rules.push({
-            el: pregoEl,
-            test: () => pregoEl && pregoEl.value.trim() !== '',
-            message: gettext('Veuillez indiquer un numéro PREGO.')
-            });
-
-            // 2️⃣ Numéro FMS ou case "Pas de FMS" obligatoire
-            rules.push({
-            el: fmsEl,
-            test: () => {
-                const hasNoFms = !!noFmsEl?.checked;
-                const fmsVal = (fmsEl?.value || '').trim();
-                return hasNoFms || fmsVal !== '';
-            },
-            message: gettext('Veuillez indiquer un numéro FMS ou cocher « Pas de FMS ».')
-            });
-
-            // 3️⃣ Si FMS présent → fichier obligatoire
-            rules.push({
-            el: docsEl,
-            test: () => {
-                const fmsVal = (fmsEl?.value || '').trim();
-                if (!fmsVal) return true; // pas de FMS => pas de contrainte
-                const files = Array.from(docsEl?.files || []);
-                return files.length > 0;
-            },
-            message: gettext('Veuillez joindre au moins un document pour une référence FMS.')
-            });
-        }
+        // Dispatch CustomEvent to allow custom validation rules injection (e.g., PREGO/FMS validations in forks)
+        const customRulesEvent = new CustomEvent('streetup:collect-validation-rules', {
+            detail: { rules: rules, isVisible: isVisible, gettext: gettext }
+        });
+        document.dispatchEvent(customRulesEvent);
 
 
       if (!['artworks', 'nature', 'roads', 'its', 'clean'].includes(thematic)) {
@@ -340,8 +299,12 @@ document.addEventListener('DOMContentLoaded', function () {
 
     // avertissements via modale (FMS, équipement structures, et statuts des assets/locations)
     const submitWarnings = [];
-    const fmsWarnMsg = getFmsWarningMessage();
-    if (fmsWarnMsg) submitWarnings.push(fmsWarnMsg);
+    
+    // Dispatch CustomEvent to collect custom warnings (e.g., FMS file validation in forks)
+    const customWarningsEvent = new CustomEvent('streetup:collect-submit-warnings', {
+        detail: { warnings: submitWarnings, gettext: gettext }
+    });
+    document.dispatchEvent(customWarningsEvent);
     
     // Vérifier les statuts des assets/locations
     const assetLocationWarnings = await getAssetLocationStatusWarningsAsync();
@@ -460,31 +423,7 @@ document.addEventListener('DOMContentLoaded', function () {
 
 
 
-// --- Helper: faut-il avertir que aucun fichier ne contient le n° FMS ? ---
-function getFmsWarningMessage() {
-  const sourceSel = document.getElementById('id_source_category');
-  const fmsEl     = document.getElementById('id_origin_fms_nbr');
-  const docsEl    = document.getElementById('id_documents');
 
-  // seulement si corrective & source PREGO
-  const opt = sourceSel?.options[sourceSel.selectedIndex];
-  const val = (opt?.value || '').trim().toLowerCase();
-  const txt = (opt?.text  || '').trim().toLowerCase();
-  const isPrego = (val === 'prego' || txt === 'prego');
-
-  if (getMaintainType() !== 'corrective' || !isPrego) return null;
-
-  const fmsVal = (fmsEl?.value || '').trim();
-  if (!fmsVal) return null;                 // pas de FMS → pas d’avertissement
-  const files = Array.from(docsEl?.files || []);
-  if (files.length === 0) return null;      // règle "fichier obligatoire si FMS" s’en charge
-
-  const hasMatch = files.some(f => String(f.name || '').includes(fmsVal));
-  if (hasMatch) return null;
-
-  // Aucun fichier ne contient le n° FMS → message pour la modale
-  return gettext(`Aucun fichier joint ne contient le n° FMS saisi (${fmsVal}). Voulez-vous envoyer quand même ?`);
-}
 
 // --- Modale d’avertissement FMS (création lazy) ---
 // --- Helper: check for inactive assets/locations (corrective maintenance only) ---
@@ -604,6 +543,5 @@ function ensureFmsWarningModal() {
 
 
 window.focusFirstFormError = focusFirstFormError;
-window.getFmsWarningMessage = getFmsWarningMessage;
 window.getAssetLocationStatusWarningsAsync = getAssetLocationStatusWarningsAsync;
 window.ensureFmsWarningModal = ensureFmsWarningModal;
diff --git a/streetup/interventions/templates/interventions/add/_intervention_add_form.html b/streetup/interventions/templates/interventions/add/_intervention_add_form.html
index 1102855..1f14bfd 100644
--- a/streetup/interventions/templates/interventions/add/_intervention_add_form.html
+++ b/streetup/interventions/templates/interventions/add/_intervention_add_form.html
@@ -292,29 +292,11 @@
                     <label for="id_source_detail" class="form-label">{% translate "Détail de la source" %} <span class="text-danger">*</span></label>
                     {{ form.source_detail }}
                 </div>
-                <!-- Référence générique (utilisée par ex. pour OBSERVATION) -->
-                <div class="mb-3 d-none" id="source-ref-generic-container">
+                <!-- Référence de la source -->
+                <div class="mb-3 d-none" id="source-ref-container">
                     <label for="id_source_ref" class="form-label">{% translate "Référence de la source" %} <span class="text-danger">*</span></label>
                     {{ form.source_ref }}
                 </div>
-                <div class="mb-3 d-none" id="source-ref-container">
-                    <label for="id_source_ref" class="form-label">{% translate "Référence de la source" %}<span class="text-danger">*</span></label>
-                    <div class="input-group">
-                        <span class="input-group-text" id="mnt-prefix" style="display: none;">MNT-</span>
-                        {{ form.origin_prego_nbr }}
-                        {{ form.origin_prego_nbr.errors }}
-                    </div>
-                    <div class="form-text mt-3">
-                        <label for="id_origin_fms_nbr" class="form-label">{% translate "Numéro FMS" %}</label>
-                        {{ form.origin_fms_nbr }}
-                        {{ form.origin_fms_nbr.errors }}
-                        <div class="form-check mt-2">
-                            {{ form.no_origin_fms }}
-                            <label class="form-check-label" for="id_no_origin_fms">{% translate "Pas de FMS" %}</label>
-                        </div>
-                        {{ form.no_origin_fms.errors }}
-                    </div>
-                </div>
             </div>
         </div>
 
diff --git a/streetup/interventions/templates/interventions/detail/card_origine.html b/streetup/interventions/templates/interventions/detail/card_origine.html
index 587b350..2ed135e 100644
--- a/streetup/interventions/templates/interventions/detail/card_origine.html
+++ b/streetup/interventions/templates/interventions/detail/card_origine.html
@@ -81,14 +81,12 @@
                             </div>
                         </div>
                         
-                        {% if intervention.source_ref or intervention.origin_prego_nbr or 'source_ref' in allowed_update_fields %}
-                        <div class="d-flex align-items-center editable-field cms-conditional-field {% if not intervention.source_ref and not intervention.origin_prego_nbr %}d-none{% endif %}" data-field="source_ref" data-can-edit="{% if 'source_ref' in allowed_update_fields %}true{% else %}false{% endif %}" data-has-value="{% if intervention.source_ref or intervention.origin_prego_nbr %}true{% else %}false{% endif %}">
+                        {% if intervention.source_ref or 'source_ref' in allowed_update_fields %}
+                        <div class="d-flex align-items-center editable-field cms-conditional-field {% if not intervention.source_ref %}d-none{% endif %}" data-field="source_ref" data-can-edit="{% if 'source_ref' in allowed_update_fields %}true{% else %}false{% endif %}" data-has-value="{% if intervention.source_ref %}true{% else %}false{% endif %}">
                             <span class="label mx-2">{% translate "Référence" %}:</span>
                             <div class="field-display">
                                 <span class="field-value">
-                                    {% if intervention.source_category.name_fr == 'PREGO' and intervention.origin_prego_nbr %}
-                                        <a href="https://jira.sprb-gob.brussels/browse/MNT-{{ intervention.origin_prego_nbr }}" target="_blank">MNT-{{ intervention.origin_prego_nbr }}</a>
-                                    {% elif source_observation %}
+                                    {% if source_observation %}
                                         <a href="{% url 'observations:observation_detail' source_observation.id %}">{{ source_observation.code }}</a>
                                     {% elif intervention.source_ref %}
                                         {{ intervention.source_ref }}
@@ -103,24 +101,6 @@
                         </div>
                         {% endif %}
                         
-                        {% if intervention.origin_fms_nbr or 'origin_fms_nbr' in allowed_update_fields %}
-                        <div class="d-flex align-items-center editable-field cms-conditional-field {% if not intervention.origin_fms_nbr %}d-none{% endif %}" data-field="origin_fms_nbr" data-can-edit="{% if 'origin_fms_nbr' in allowed_update_fields %}true{% else %}false{% endif %}" data-has-value="{% if intervention.origin_fms_nbr %}true{% else %}false{% endif %}">
-                            <span class="label mx-2">FMS N°:</span>
-                            <div class="field-display">
-                                <span class="field-value">
-                                    {% if intervention.origin_fms_nbr %}
-                                        <a href="https://fixmystreet.brussels/{{ intervention.origin_fms_nbr }}" target="_blank">{{ intervention.origin_fms_nbr }}</a>
-                                    {% else %}
-                                        -
-                                    {% endif %}
-                                </span>
-                            </div>
-                            <div class="field-edit d-none" style="flex: 1;">
-                                <input type="number" class="form-control form-control-sm" value="{{ intervention.origin_fms_nbr|default:'' }}" placeholder="FMS N°">
-                            </div>
-                        </div>
-                        {% endif %}
-                        
                         {% if intervention.source_detail or 'source_detail' in allowed_update_fields %}
                         <div class="d-flex align-items-center editable-field cms-conditional-field {% if not intervention.source_detail %}d-none{% endif %}" data-field="source_detail" data-can-edit="{% if 'source_detail' in allowed_update_fields %}true{% else %}false{% endif %}" data-has-value="{% if intervention.source_detail %}true{% else %}false{% endif %}">
                             <span class="label mx-2">{% translate "Détail" %}:</span>
diff --git a/streetup/interventions/templates/interventions/interventions_calendar.html b/streetup/interventions/templates/interventions/interventions_calendar.html
index 5b27edd..3d2f9ec 100644
--- a/streetup/interventions/templates/interventions/interventions_calendar.html
+++ b/streetup/interventions/templates/interventions/interventions_calendar.html
@@ -259,7 +259,7 @@
         </div>
         <div class="calendar-toolbar__actions">
             <div class="input-group input-group-sm me-2" style="width: 380px;">
-                <input type="text" name="q" id="calendar-search-input" class="form-control" placeholder="{% translate 'Titre, code, localisation, contrat, Prego, FMS…' %}" value="{{ selected_search|default:'' }}">
+                <input type="text" name="q" id="calendar-search-input" class="form-control" placeholder="{% translate 'Titre, code, localisation, contrat…' %}" value="{{ selected_search|default:'' }}">
                 <button class="btn btn-outline-secondary" type="button" id="calendar-search-clear" title="{% translate 'Effacer la recherche' %}" {% if not selected_search %}style="display:none;"{% endif %}>
                     <i class="bi bi-x-lg"></i>
                 </button>
diff --git a/streetup/interventions/templates/interventions/interventions_index.html b/streetup/interventions/templates/interventions/interventions_index.html
index 0a22140..8ca2787 100644
--- a/streetup/interventions/templates/interventions/interventions_index.html
+++ b/streetup/interventions/templates/interventions/interventions_index.html
@@ -833,7 +833,7 @@
                 <div style="position:relative; display:flex;">
                     <input type="text" id="interventions-search-input" class="form-control form-control-sm"
                            style="width:320px; border-radius:20px 0 0 20px; border-color:#dee2e6; padding-right:1.6rem;"
-                           placeholder="{% translate 'Titre, code, localisation, contrat, Prego, FMS…' %}">
+                           placeholder="{% translate 'Titre, code, localisation, contrat…' %}">
                     <button type="button" id="interventions-search-clear"
                             style="position:absolute; right:4px; top:50%; transform:translateY(-50%);
                                    background:none; border:none; padding:0 2px; line-height:1;
diff --git a/streetup/interventions/views/calendar.py b/streetup/interventions/views/calendar.py
index b7ee77f..616cd38 100644
--- a/streetup/interventions/views/calendar.py
+++ b/streetup/interventions/views/calendar.py
@@ -403,19 +403,17 @@ def interventions_events(request):
 
     if selected_search:
         words = selected_search.split()
-        interventions = interventions.annotate(
-            _prego_str=Cast('origin_prego_nbr', output_field=CharField()),
-            _fms_str=Cast('origin_fms_nbr', output_field=CharField()),
-        )
+        from common.hooks import hooks
+        interventions = hooks.apply_search_annotations(interventions)
         def _word_q(word):
-            return (
+            q_base = (
                 Q(title__icontains=word)
                 | Q(code__icontains=word)
                 | Q(location_code__icontains=word)
                 | Q(contract__contract_number__icontains=word)
-                | Q(_prego_str__icontains=word)
-                | Q(_fms_str__icontains=word)
             )
+            q_base |= hooks.get_search_filters(word)
+            return q_base
         combined = Q()
         for w in words:
             combined &= _word_q(w)
diff --git a/streetup/interventions/views/forms.py b/streetup/interventions/views/forms.py
index c9f0c22..6d3a28e 100644
--- a/streetup/interventions/views/forms.py
+++ b/streetup/interventions/views/forms.py
@@ -36,7 +36,6 @@ class InterventionForm(forms.ModelForm):
     
     documents = MultipleFileField(required=False, label=_("Documents"))
     project = forms.ModelChoiceField(required=False, label=_("Projet"), queryset = Project.get_active_projects())
-    no_origin_fms = forms.BooleanField(required=False, label=_("Pas de FMS"))
 
     def __init__(self, *args, thematic=None, user=None, **kwargs):
         super().__init__(*args, **kwargs)
@@ -87,7 +86,6 @@ class InterventionForm(forms.ModelForm):
 
         self.fields['documents'].widget.attrs.update({'class': 'form-control'})
         self.fields['project'].widget.attrs.update({'class': 'form-select'})
-        self.fields['no_origin_fms'].widget.attrs.update({'class': 'form-check-input'})
 
         # Limit status choices to statuses up to 'pris en charge' (assigned)
         allowed_statuses = ['in_preparation', 'to_be_approved', 'to_be_planned', 'to_be_processed', 'assigned']
@@ -172,7 +170,7 @@ class InterventionForm(forms.ModelForm):
             'code', 'title', 'status', 'priority', 'init_description', 
             'maintain_type', 'type', 'origin_type', 'begin_time', 'end_time', 
             'asset_category', 'symptom',
-            'source_category', 'source_detail', 'source_ref', 'origin_prego_nbr', 'origin_fms_nbr',
+            'source_category', 'source_detail', 'source_ref',
             'lat', 'lon', 'geom', 'address',
             'reason_for_correction', 'correction_details',
             'documents', 'project'
@@ -185,8 +183,6 @@ class InterventionForm(forms.ModelForm):
             'source_category': forms.Select(attrs={'class': 'form-select'}),
             'source_detail': forms.TextInput(attrs={'class': 'form-control'}),
             'source_ref': forms.TextInput(attrs={'class': 'form-control'}),
-            'origin_prego_nbr': forms.NumberInput(attrs={'class': 'form-control', 'placeholder': _('Numéro PREGO')}),
-            'origin_fms_nbr': forms.NumberInput(attrs={'class': 'form-control', 'placeholder': _('Numéro FMS'), 'min': 0, 'max': 2147483647}),
 
             'asset_category': forms.Select(attrs={'class': 'form-select'}),
             'symptom': forms.Select(attrs={'class': 'form-select'}),
@@ -210,15 +206,6 @@ class InterventionForm(forms.ModelForm):
             'correction_details': forms.Textarea(attrs={'class': 'form-control', 'rows': 3}),
         }
 
-    def _is_prego_source(self, source_category):
-        if not source_category:
-            return False
-        possible_names = [
-            getattr(source_category, attr, "") or ""
-            for attr in ("name_fr", "name_nl")
-        ]
-        return any(name.strip().lower() == "prego" for name in possible_names if isinstance(name, str))
-
     def _is_observation_source(self, source_category):
         """Return True when the selected source category corresponds to OBSERVATION (FR/NL)."""
         if not source_category:
@@ -258,9 +245,6 @@ class InterventionForm(forms.ModelForm):
             if not cleaned_data.get('origin_type'):
                 cleaned_data['origin_type'] = 'demand'
         source_category = cleaned_data.get('source_category')
-        origin_prego_nbr = cleaned_data.get('origin_prego_nbr')
-        origin_fms_nbr = cleaned_data.get('origin_fms_nbr')
-        no_origin_fms = cleaned_data.get('no_origin_fms')
         documents = cleaned_data.get('documents') or []
 
         # Ensure consistent list of uploaded files
@@ -297,27 +281,6 @@ class InterventionForm(forms.ModelForm):
                     _("Un équipement est obligatoire pour ce symptôme."),
                 )
 
-        if maintain_type == 'corrective' and self._is_prego_source(source_category):
-            if not origin_prego_nbr:
-                self.add_error(
-                    'origin_prego_nbr',
-                    _("Veuillez indiquer un numéro PREGO."),
-                )
-            
-            if not origin_fms_nbr and not no_origin_fms:
-                self.add_error(
-                    'origin_fms_nbr',
-                    _("Veuillez indiquer un numéro FMS ou cocher \"Pas de FMS\"."),
-                )
-            if origin_fms_nbr:
-                if not documents:
-                    self.add_error(
-                        'documents',
-                        _("Veuillez joindre au moins un document pour une référence FMS."),
-                    )
-            elif no_origin_fms:
-                cleaned_data['origin_fms_nbr'] = None
-
         # OBSERVATION: require a simple source reference (we use the observation id by convention)
         if maintain_type == 'corrective' and self._is_observation_source(source_category):
             source_ref = (cleaned_data.get('source_ref') or "").strip()
@@ -334,6 +297,10 @@ class InterventionForm(forms.ModelForm):
                         _("La référence doit être un identifiant numérique (ID d'observation)."),
                     )
 
+        # Validation spécifique externe via les hooks
+        from common.hooks import hooks
+        cleaned_data = hooks.run_form_cleaners(self, cleaned_data)
+
         return cleaned_data
  
 
diff --git a/streetup/interventions/views/general.py b/streetup/interventions/views/general.py
index 428ff83..1214480 100644
--- a/streetup/interventions/views/general.py
+++ b/streetup/interventions/views/general.py
@@ -510,19 +510,17 @@ def interventions_geojson(request):
 
     if search_q:
         words = search_q.split()
-        qs = qs.annotate(
-            _prego_str=Cast('origin_prego_nbr', output_field=CharField()),
-            _fms_str=Cast('origin_fms_nbr', output_field=CharField()),
-        )
+        from common.hooks import hooks
+        qs = hooks.apply_search_annotations(qs)
         def _word_q(word):
-            return (
+            q_base = (
                 Q(title__icontains=word)
                 | Q(code__icontains=word)
                 | Q(location_code__icontains=word)
                 | Q(contract__contract_number__icontains=word)
-                | Q(_prego_str__icontains=word)
-                | Q(_fms_str__icontains=word)
             )
+            q_base |= hooks.get_search_filters(word)
+            return q_base
         combined = Q()
         for w in words:
             combined &= _word_q(w)
@@ -648,19 +646,17 @@ def interventions_geojson(request):
         search_mode = 'and'
     if search_q:
         words = search_q.split()
-        qs = qs.annotate(
-            _prego_str=Cast('origin_prego_nbr', output_field=CharField()),
-            _fms_str=Cast('origin_fms_nbr', output_field=CharField()),
-        )
+        from common.hooks import hooks
+        qs = hooks.apply_search_annotations(qs)
         def _word_q(word):
-            return (
+            q_base = (
                 Q(title__icontains=word)
                 | Q(code__icontains=word)
                 | Q(location_code__icontains=word)
                 | Q(contract__contract_number__icontains=word)
-                | Q(_prego_str__icontains=word)
-                | Q(_fms_str__icontains=word)
             )
+            q_base |= hooks.get_search_filters(word)
+            return q_base
         combined = Q()
         if search_mode == 'and':
             for _w in words:
@@ -779,21 +775,19 @@ def interventions_search(request):
     base_qs = (
         filter_viewable_interventions_for_user(request.user)
         .select_related('contract', 'contract__company')
-        .annotate(
-            prego_str=Cast('origin_prego_nbr', output_field=CharField()),
-            fms_str=Cast('origin_fms_nbr', output_field=CharField()),
-        )
     )
+    from common.hooks import hooks
+    base_qs = hooks.apply_search_annotations(base_qs)
 
     def word_filter(word):
-        return (
+        q_base = (
             Q(title__icontains=word)
             | Q(code__icontains=word)
             | Q(location_code__icontains=word)
             | Q(contract__contract_number__icontains=word)
-            | Q(prego_str__icontains=word)
-            | Q(fms_str__icontains=word)
         )
+        q_base |= hooks.get_search_filters(word)
+        return q_base
 
     combined = Q()
     if mode == 'and':
@@ -807,16 +801,17 @@ def interventions_search(request):
 
     results = []
     for itv in qs:
-        results.append({
+        item = {
             'id': itv.id,
             'code': itv.code or '',
             'title': itv.title or '',
             'location_code': itv.location_code or '',
             'status': itv.status or '',
             'contract_number': itv.contract.contract_number if itv.contract else '',
-            'origin_prego_nbr': itv.origin_prego_nbr,
-            'origin_fms_nbr': itv.origin_fms_nbr,
-        })
+        }
+        for key in hooks.get_custom_allowed_fields():
+            item[key] = getattr(itv, key, None)
+        results.append(item)
 
     return JsonResponse({'results': results})
 
@@ -938,8 +933,12 @@ def export_interventions(request):
         (_("Catégorie source"), lambda i: (i.source_category.getName() if i.source_category else '')),
         (_("Détail source"), lambda i: i.source_detail or ''),
         (_("Référence source"), lambda i: i.source_ref or ''),
-        (_("Numéro Prego"), lambda i: i.origin_prego_nbr or ''),
-        (_("Numéro FMS"), lambda i: i.origin_fms_nbr or ''),
+    ]
+
+    from common.hooks import hooks
+    columns.extend(hooks.get_custom_export_fields())
+
+    columns.extend([
         (_("Fournisseur assigné"), lambda i: (i.assigned_provider.name if i.assigned_provider else '')),
         (_("Equipe assignée"), lambda i: (i.assigned_team.name if i.assigned_team else '')),
         (_("Membre assigné"), lambda i: (i.assigned_member.name if i.assigned_member else '')),
@@ -957,7 +956,7 @@ def export_interventions(request):
         (_("Adresse"), lambda i: i.address or ''),
         (_("Longitude"), lambda i: i.lon if i.lon is not None else ''),
         (_("Latitude"), lambda i: i.lat if i.lat is not None else ''),
-    ]
+    ])
 
     user_config = getattr(request.user, 'config', None)
     # If user has role 'operator', include name of files attached to intervention by the creator of the intervention
diff --git a/streetup/interventions/views/helpers.py b/streetup/interventions/views/helpers.py
index a41b7c4..4755f73 100644
--- a/streetup/interventions/views/helpers.py
+++ b/streetup/interventions/views/helpers.py
@@ -1775,19 +1775,17 @@ def apply_intervention_filters_from_querydict(qs, params, user=None):
         if search_mode not in ('and', 'or'):
             search_mode = 'and'
         words = search_q.split()
-        qs = qs.annotate(
-            _prego_str=Cast('origin_prego_nbr', output_field=CharField()),
-            _fms_str=Cast('origin_fms_nbr', output_field=CharField()),
-        )
+        from common.hooks import hooks
+        qs = hooks.apply_search_annotations(qs)
         def _word_q(word):
-            return (
+            q_base = (
                 Q(title__icontains=word)
                 | Q(code__icontains=word)
                 | Q(location_code__icontains=word)
                 | Q(contract__contract_number__icontains=word)
-                | Q(_prego_str__icontains=word)
-                | Q(_fms_str__icontains=word)
             )
+            q_base |= hooks.get_search_filters(word)
+            return q_base
         combined = Q()
         if search_mode == 'and':
             for w in words:
@@ -2414,6 +2412,11 @@ def _update_intervention_field(intervention, field, new_value, user_config=None)
         new_value: La nouvelle valeur
         user_config: La configuration utilisateur (optionnel, utilisé pour vérifier les permissions)
     """
+    from common.hooks import hooks
+    success, error = hooks.run_inline_edit_validator(field, new_value, intervention)
+    if success is not None:
+        return success, error
+
     if field == "title":
         if len(new_value) <= 200:
             intervention.title = new_value
@@ -2625,14 +2628,6 @@ def _update_intervention_field(intervention, field, new_value, user_config=None)
             return True, None
         return False, _('Value for source_detail must be limited to 255 characters')
 
-    elif field == "origin_fms_nbr":
-        if new_value == "":
-            intervention.origin_fms_nbr = None
-            return True, None
-        if new_value.isdigit():
-            intervention.origin_fms_nbr = int(new_value)
-            return True, None
-        return False, _('Value for FMS number must be a positive integer')
 
     elif field == "description":
         if len(new_value) <= 1024:
diff --git a/streetup/interventions/views/views_pdf_reporting.py b/streetup/interventions/views/views_pdf_reporting.py
index ec0fa05..fe7382a 100644
--- a/streetup/interventions/views/views_pdf_reporting.py
+++ b/streetup/interventions/views/views_pdf_reporting.py
@@ -686,10 +686,12 @@ class InterventionPDF(FPDF):
         if intervention.source_category and intervention.source_category.has_reference:
             label_fr = "Référence:"
             label_nl = "Referentie:"
-            if is_observation_source and intervention.source_ref:
+            from common.hooks import hooks
+            custom_ref = hooks.get_custom_source_ref_value(intervention)
+            if custom_ref is not None:
+                text_value = custom_ref
+            elif is_observation_source and intervention.source_ref:
                 text_value = f"Observation {intervention.source_ref}"
-            elif intervention.source_category.name_fr == "PREGO":
-                text_value = f"MNT-{intervention.origin_prego_nbr}" if intervention.origin_prego_nbr else ""
             else:
                 text_value = intervention.source_ref or ""
         else:
@@ -1515,11 +1517,9 @@ class InterventionReportPDF(FPDF):
             if intervention.source_detail:
                 self._add_field(_("Détail source"), intervention.source_detail)
             
-            if intervention.origin_prego_nbr:
-                self._add_field("PREGO", f"MNT-{intervention.origin_prego_nbr}")
-            
-            if intervention.origin_fms_nbr:
-                self._add_field("Fix My Street", intervention.origin_fms_nbr)
+            from common.hooks import hooks
+            for label, value in hooks.extract_pdf_fields(intervention):
+                self._add_field(label, value)
             
             if intervention.init_call_confirmed_time:
                 self._add_field(_("Appel confirmé"), 
diff --git a/streetup/streetup/settings.py b/streetup/streetup/settings.py
index bbf6115..1b60eb9 100644
--- a/streetup/streetup/settings.py
+++ b/streetup/streetup/settings.py
@@ -391,6 +391,14 @@ if 'test' in sys.argv:
     PASSWORD_HASHERS = [
         'django.contrib.auth.hashers.MD5PasswordHasher',
     ]
+    STORAGES = {
+        "default": {
+            "BACKEND": "django.core.files.storage.FileSystemStorage",
+        },
+        "staticfiles": {
+            "BACKEND": "django.contrib.staticfiles.storage.StaticFilesStorage",
+        },
+    }
     if '--recreate-db' in sys.argv:
         sys.argv.remove('--recreate-db')
         os.environ['RECREATE_DB'] = '1'