diff --git a/CLAUDE.md b/CLAUDE.md
index abe8e70..2d0f0f2 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -44,6 +44,12 @@
 - Saisie d'heures (ou de jours de présence) autorisée sur un férié
 - **Crédit automatique des heures contractuelles** sur un férié Lun-Ven pour tout contrat hors Forfait, **uniquement en l'absence d'absence déclarée** : le total journalier = `max(saisie + credited_absence, référence_contractuelle)`. Référence : 35h→7h, 39h→8h Lun-Jeu/7h Ven, CUSTOM→weeklyHours/5, INTERIM→idem 35h/39h/custom selon weeklyHours. Aucune ligne BDD créée (crédit virtuel). Drivers : crédité en `dayHoursMinutes`. Impacte directement le total hebdo RTT (tranches 25%/50%). Dès qu'une absence est posée sur le férié, le crédit virtuel saute — c'est le `countAsWorkedHours` du type d'absence qui pilote. Services : `App\Service\WorkHours\HolidayVirtualHoursResolver` + `DailyReferenceMinutesResolver`. Doc complète : `doc/holiday-virtual-hours.md`.
 
+## Commentaires de semaine
+- Entité `EmployeeWeekComment` : commentaire libre par employé et semaine ISO (unique `(employee_id, week_start_date)`). `week_start_date` = lundi.
+- CRUD `/employee_week_comments` `ROLE_ADMIN`. Write processor audite via `AuditLogger`.
+- Picto bulle vue semaine (HoursWeekView + DriverHoursWeekView) : fond bleu/rouge. Intégré dans `WeeklySummaryRow.comment/commentId`.
+- Doc : `doc/week-comments.md`.
+
 ## Validation Rules
 - `isValid` (RH): locks line for everyone (admin can only untoggle validation)
 - `isSiteValid` (site manager): locks for non-admin, admin can still edit
diff --git a/frontend/components/driver-hours/DriverHoursWeekView.vue b/frontend/components/driver-hours/DriverHoursWeekView.vue
index 8fc8c16..d35da54 100644
--- a/frontend/components/driver-hours/DriverHoursWeekView.vue
+++ b/frontend/components/driver-hours/DriverHoursWeekView.vue
@@ -33,8 +33,11 @@
             {{ row.firstName }} {{ row.lastName }}
             <span class="font-normal text-neutral-600">({{ row.contractName ?? '-' }})</span>
           </p>
-          <p class="text-[11px] text-neutral-500 truncate">
-            {{ row.siteName ?? 'Sans site' }}<span v-if="row.contractNature"> — {{ contractNatureLabel(row.contractNature) }}</span>
+          <p class="text-[11px] text-neutral-500 truncate inline-flex items-center gap-2">
+            <span>{{ row.siteName ?? 'Sans site' }}<span v-if="row.contractNature"> — {{ contractNatureLabel(row.contractNature) }}</span></span>
+            <button v-if="isAdmin" type="button" class="inline-flex items-center justify-center rounded-md p-1 text-white transition-colors" :class="row.comment ? 'bg-red-500 hover:bg-red-600' : 'bg-primary-500 hover:bg-secondary-500'" :title="row.comment ?? 'Ajouter un commentaire'" @click="$emit('open-comment', row)">
+              <Icon name="mdi:comment-text-outline" size="12"/>
+            </button>
           </p>
         </div>
 
@@ -103,9 +106,12 @@ const getDailyCellStyle = (daily: {
 
 defineProps<{
   isWeekLoading: boolean
+  isAdmin: boolean
   weekGridCols: string
   weeklySummary: WeeklyWorkHourSummary | null
   weekDayHeaders: Array<{ date: string; weekday: string; dayDate: string }>
   formatMinutes: (minutes: number) => string
 }>()
+
+defineEmits<{ (e: 'open-comment', row: WeeklyWorkHourSummary['rows'][number]): void }>()
 </script>
diff --git a/frontend/components/hours/HoursWeekView.vue b/frontend/components/hours/HoursWeekView.vue
index 2a629a9..671d4b1 100644
--- a/frontend/components/hours/HoursWeekView.vue
+++ b/frontend/components/hours/HoursWeekView.vue
@@ -29,8 +29,11 @@
             {{ row.firstName }} {{ row.lastName }}
             <span class="font-normal text-neutral-600">({{ row.contractName ?? '-' }})</span>
           </p>
-          <p class="text-[11px] text-neutral-500 truncate">
-            {{ row.siteName ?? 'Sans site' }}<span v-if="row.contractNature"> — {{ contractNatureLabel(row.contractNature) }}</span>
+          <p class="text-[11px] text-neutral-500 truncate inline-flex items-center gap-2">
+            <span>{{ row.siteName ?? 'Sans site' }}<span v-if="row.contractNature"> — {{ contractNatureLabel(row.contractNature) }}</span></span>
+            <button v-if="isAdmin" type="button" class="inline-flex items-center justify-center rounded-md p-1 text-white transition-colors" :class="row.comment ? 'bg-red-500 hover:bg-red-600' : 'bg-primary-500 hover:bg-secondary-500'" :title="row.comment ?? 'Ajouter un commentaire'" @click="$emit('open-comment', row)">
+              <Icon name="mdi:comment-text-outline" size="12"/>
+            </button>
           </p>
         </div>
 
@@ -99,9 +102,12 @@ const getDailyCellStyle = (daily: {
 
 defineProps<{
   isWeekLoading: boolean
+  isAdmin: boolean
   weekGridCols: string
   weeklySummary: WeeklyWorkHourSummary | null
   weekDayHeaders: Array<{ date: string; label: string }>
   formatMinutes: (minutes: number) => string
 }>()
+
+defineEmits<{ (e: 'open-comment', row: WeeklyWorkHourSummary['rows'][number]): void }>()
 </script>
diff --git a/frontend/components/hours/WeekCommentDrawer.vue b/frontend/components/hours/WeekCommentDrawer.vue
new file mode 100644
index 0000000..3fb4563
--- /dev/null
+++ b/frontend/components/hours/WeekCommentDrawer.vue
@@ -0,0 +1,67 @@
+<template>
+  <AppDrawer v-model="drawerOpen" :title="`Commentaire — ${formatWeekRange}`">
+    <form class="space-y-4" @submit.prevent="onSave">
+      <div v-if="employeeLabel" class="text-md font-semibold text-neutral-700">{{ employeeLabel }}</div>
+      <div>
+        <label class="text-md font-semibold text-neutral-700" for="week-comment-content">Commentaire</label>
+        <textarea id="week-comment-content" v-model="content" rows="8" maxlength="5000" class="mt-2 w-full rounded-md border border-neutral-300 bg-white px-3 py-2 text-base text-neutral-900 focus:border-primary-500 focus:outline-none focus:ring-2 focus:ring-secondary-500/20" placeholder="Ex. Arrêt maladie lundi, reprise jeudi..." />
+        <p class="mt-1 text-xs text-neutral-400">{{ content.length }} / 5000</p>
+      </div>
+      <div class="sticky bottom-0 -mx-[20px] bg-white px-[20px] py-3 flex justify-between gap-3">
+        <button v-if="commentId" type="button" class="rounded-lg bg-red-500 px-4 py-2 text-md font-semibold text-white hover:bg-red-600 disabled:opacity-50" :disabled="isSubmitting" @click="onDelete">Supprimer</button>
+        <div class="flex gap-3 ml-auto">
+          <button type="button" class="rounded-lg border border-neutral-200 px-4 py-2 text-md font-semibold text-neutral-700 hover:bg-neutral-100" @click="drawerOpen = false">Annuler</button>
+          <button type="submit" class="rounded-lg bg-primary-500 px-4 py-2 text-md font-semibold text-white hover:bg-secondary-500 disabled:opacity-50" :disabled="isSubmitting || !canSubmit">Enregistrer</button>
+        </div>
+      </div>
+    </form>
+  </AppDrawer>
+</template>
+
+<script setup lang="ts">
+import { computed, ref, watch } from 'vue'
+import AppDrawer from '~/components/AppDrawer.vue'
+import { createWeekComment, deleteWeekComment, updateWeekComment } from '~/services/employee-week-comments'
+
+const props = defineProps<{
+  modelValue: boolean
+  employeeId: number | null
+  weekStart: string
+  weekEnd: string
+  initialContent: string
+  commentId: number | null
+  employeeLabel?: string
+}>()
+const emit = defineEmits<{ (e: 'update:modelValue', v: boolean): void; (e: 'saved'): void }>()
+
+const drawerOpen = computed({ get: () => props.modelValue, set: (v) => emit('update:modelValue', v) })
+const content = ref('')
+const isSubmitting = ref(false)
+
+watch(() => [props.modelValue, props.initialContent] as const, ([open, init]) => { if (open) content.value = init ?? '' }, { immediate: true })
+
+const formatWeekRange = computed(() => {
+  const fmt = (ymd: string) => { const p = ymd.split('-'); return p.length === 3 ? `${p[2]}/${p[1]}/${p[0]}` : ymd }
+  return `${fmt(props.weekStart)} → ${fmt(props.weekEnd)}`
+})
+
+const canSubmit = computed(() => content.value.trim().length > 0 || props.commentId !== null)
+
+const onSave = async () => {
+  if (!props.employeeId || isSubmitting.value) return
+  const trimmed = content.value.trim()
+  isSubmitting.value = true
+  try {
+    if (trimmed === '' && props.commentId) await deleteWeekComment(props.commentId)
+    else if (trimmed !== '' && props.commentId) await updateWeekComment(props.commentId, trimmed)
+    else if (trimmed !== '') await createWeekComment({ employeeId: props.employeeId, weekStartDate: props.weekStart, content: trimmed })
+    emit('saved'); drawerOpen.value = false
+  } finally { isSubmitting.value = false }
+}
+
+const onDelete = async () => {
+  if (!props.commentId || isSubmitting.value) return
+  isSubmitting.value = true
+  try { await deleteWeekComment(props.commentId); emit('saved'); drawerOpen.value = false } finally { isSubmitting.value = false }
+}
+</script>
diff --git a/frontend/composables/useDriverHoursPage.ts b/frontend/composables/useDriverHoursPage.ts
index c822005..b170a6d 100644
--- a/frontend/composables/useDriverHoursPage.ts
+++ b/frontend/composables/useDriverHoursPage.ts
@@ -922,6 +922,15 @@ export const useDriverHoursPage = () => {
     }
   }
 
+  const isWeekCommentDrawerOpen = ref(false)
+  const weekCommentContext = ref<{ employeeId: number; employeeLabel: string; weekStart: string; weekEnd: string; content: string; commentId: number | null } | null>(null)
+  const openWeekCommentDrawer = (row: { employeeId: number; firstName: string; lastName: string; comment?: string | null; commentId?: number | null }) => {
+    if (!weeklySummary.value) return
+    weekCommentContext.value = { employeeId: row.employeeId, employeeLabel: `${row.firstName} ${row.lastName}`.trim(), weekStart: weeklySummary.value.weekStart, weekEnd: weeklySummary.value.weekEnd, content: row.comment ?? '', commentId: row.commentId ?? null }
+    isWeekCommentDrawerOpen.value = true
+  }
+  const reloadWeeklySummary = async () => { await loadWeeklySummary() }
+
   return {
     isAdmin,
     isSelfUser,
@@ -988,6 +997,10 @@ export const useDriverHoursPage = () => {
     deleteAbsenceFromDrawer,
     closeAbsenceDrawer,
     formatMinutes,
-    handleSave
+    handleSave,
+    isWeekCommentDrawerOpen,
+    weekCommentContext,
+    openWeekCommentDrawer,
+    reloadWeeklySummary
   }
 }
diff --git a/frontend/composables/useHoursPage.ts b/frontend/composables/useHoursPage.ts
index 610927d..bd1ac10 100644
--- a/frontend/composables/useHoursPage.ts
+++ b/frontend/composables/useHoursPage.ts
@@ -1108,6 +1108,15 @@ export const useHoursPage = () => {
     }
   }
 
+  const isWeekCommentDrawerOpen = ref(false)
+  const weekCommentContext = ref<{ employeeId: number; employeeLabel: string; weekStart: string; weekEnd: string; content: string; commentId: number | null } | null>(null)
+  const openWeekCommentDrawer = (row: { employeeId: number; firstName: string; lastName: string; comment?: string | null; commentId?: number | null }) => {
+    if (!weeklySummary.value) return
+    weekCommentContext.value = { employeeId: row.employeeId, employeeLabel: `${row.firstName} ${row.lastName}`.trim(), weekStart: weeklySummary.value.weekStart, weekEnd: weeklySummary.value.weekEnd, content: row.comment ?? '', commentId: row.commentId ?? null }
+    isWeekCommentDrawerOpen.value = true
+  }
+  const reloadWeeklySummary = async () => { await loadWeeklySummary() }
+
   return {
     isAdmin,
     isSelfUser,
@@ -1181,6 +1190,10 @@ export const useHoursPage = () => {
     deleteAbsenceFromDrawer,
     closeAbsenceDrawer,
     formatMinutes,
-    handleSave
+    handleSave,
+    isWeekCommentDrawerOpen,
+    weekCommentContext,
+    openWeekCommentDrawer,
+    reloadWeeklySummary
   }
 }
diff --git a/frontend/data/documentation-content.ts b/frontend/data/documentation-content.ts
index 6124ed8..6995b15 100644
--- a/frontend/data/documentation-content.ts
+++ b/frontend/data/documentation-content.ts
@@ -79,6 +79,16 @@ export const documentationSections: DocSection[] = [
           { type: 'list', content: 'Jour : total des heures dans la plage 06:00–21:00\nNuit : total des heures dans les plages 00:00–06:00 et 21:00–24:00\nTotal : somme des heures de jour et de nuit' },
         ],
       },
+      {
+        id: 'commentaire-semaine',
+        title: 'Commentaires de semaine (admin)',
+        requiredLevel: 'admin',
+        blocks: [
+          { type: 'paragraph', content: 'Sur la vue semaine, un picto bulle permet d\'attacher un commentaire libre sur la semaine d\'un employé.' },
+          { type: 'list', content: 'Bulle bleue : pas de commentaire\nBulle rouge : un commentaire existe\nClic : ouvre le drawer avec textarea' },
+          { type: 'note', content: 'Les commentaires n\'affectent aucun calcul. Pour supprimer, videz la textarea puis Enregistrer, ou bouton Supprimer.' },
+        ],
+      },
     ],
   },
   {
diff --git a/frontend/pages/driver-hours.vue b/frontend/pages/driver-hours.vue
index ab48e16..7f78da2 100644
--- a/frontend/pages/driver-hours.vue
+++ b/frontend/pages/driver-hours.vue
@@ -73,11 +73,13 @@
                 <DriverHoursWeekView
                     v-else-if="isAdmin && viewMode === 'week'"
                     :is-week-loading="isWeekLoading"
+                    :is-admin="isAdmin"
                     :week-grid-cols="weekGridCols"
                     :weekly-summary="filteredWeeklySummary"
                     :week-day-headers="weekDayHeaders"
                     :format-minutes="formatMinutes"
                     class="max-h-[calc(100vh-300px)]"
+                    @open-comment="openWeekCommentDrawer"
                 />
             </div>
 
@@ -109,6 +111,17 @@
             @cancel="closeAbsenceDrawer"
         />
 
+        <HoursWeekCommentDrawer
+            v-if="weekCommentContext"
+            v-model="isWeekCommentDrawerOpen"
+            :employee-id="weekCommentContext.employeeId"
+            :employee-label="weekCommentContext.employeeLabel"
+            :week-start="weekCommentContext.weekStart"
+            :week-end="weekCommentContext.weekEnd"
+            :initial-content="weekCommentContext.content"
+            :comment-id="weekCommentContext.commentId"
+            @saved="reloadWeeklySummary"
+        />
     </div>
 </template>
 
@@ -177,7 +190,11 @@ const {
   formatMinutes,
   isSelectedDateHoliday,
   selectedHolidayLabel,
-  handleSave
+  handleSave,
+  isWeekCommentDrawerOpen,
+  weekCommentContext,
+  openWeekCommentDrawer,
+  reloadWeeklySummary
 } = useDriverHoursPage()
 
 useHead({
diff --git a/frontend/pages/hours.vue b/frontend/pages/hours.vue
index c883a21..3c408a9 100644
--- a/frontend/pages/hours.vue
+++ b/frontend/pages/hours.vue
@@ -80,11 +80,13 @@
                 <HoursWeekView
                     v-else-if="isAdmin && viewMode === 'week'"
                     :is-week-loading="isWeekLoading"
+                    :is-admin="isAdmin"
                     :week-grid-cols="weekGridCols"
                     :weekly-summary="filteredWeeklySummary"
                     :week-day-headers="weekDayHeaders"
                     :format-minutes="formatMinutes"
                     class="max-h-[calc(100vh-300px)]"
+                    @open-comment="openWeekCommentDrawer"
                 />
             </div>
 
@@ -116,6 +118,17 @@
             @cancel="closeAbsenceDrawer"
         />
 
+        <HoursWeekCommentDrawer
+            v-if="weekCommentContext"
+            v-model="isWeekCommentDrawerOpen"
+            :employee-id="weekCommentContext.employeeId"
+            :employee-label="weekCommentContext.employeeLabel"
+            :week-start="weekCommentContext.weekStart"
+            :week-end="weekCommentContext.weekEnd"
+            :initial-content="weekCommentContext.content"
+            :comment-id="weekCommentContext.commentId"
+            @saved="reloadWeeklySummary"
+        />
     </div>
 </template>
 
@@ -191,7 +204,11 @@ const {
   deleteAbsenceFromDrawer,
   closeAbsenceDrawer,
   formatMinutes,
-  handleSave
+  handleSave,
+  isWeekCommentDrawerOpen,
+  weekCommentContext,
+  openWeekCommentDrawer,
+  reloadWeeklySummary
 } = useHoursPage()
 
 useHead({
diff --git a/frontend/services/dto/work-hour.ts b/frontend/services/dto/work-hour.ts
index 99497db..16651b5 100644
--- a/frontend/services/dto/work-hour.ts
+++ b/frontend/services/dto/work-hour.ts
@@ -88,6 +88,8 @@ export type WeeklyWorkHourRowSummary = {
   weeklyOvernightCount?: number
   hasContractForWeek?: boolean
   contractNature?: 'CDI' | 'CDD' | 'INTERIM' | null
+  comment?: string | null
+  commentId?: number | null
 }
 
 export type WeeklyWorkHourSummary = {
diff --git a/frontend/services/employee-week-comments.ts b/frontend/services/employee-week-comments.ts
new file mode 100644
index 0000000..d93fc4a
--- /dev/null
+++ b/frontend/services/employee-week-comments.ts
@@ -0,0 +1,24 @@
+export type EmployeeWeekComment = {
+  id: number
+  weekStartDate: string
+  content: string
+}
+
+export const createWeekComment = async (payload: { employeeId: number; weekStartDate: string; content: string }) => {
+  const api = useApi()
+  return api.post<EmployeeWeekComment>('/employee_week_comments', {
+    employee: `/api/employees/${payload.employeeId}`,
+    weekStartDate: payload.weekStartDate,
+    content: payload.content
+  }, { toastSuccessKey: 'success.week-comment.save', toastErrorKey: 'errors.week-comment.save' })
+}
+
+export const updateWeekComment = async (id: number, content: string) => {
+  const api = useApi()
+  return api.patch<EmployeeWeekComment>(`/employee_week_comments/${id}`, { content }, { toastSuccessKey: 'success.week-comment.save', toastErrorKey: 'errors.week-comment.save' })
+}
+
+export const deleteWeekComment = async (id: number) => {
+  const api = useApi()
+  await api.delete(`/employee_week_comments/${id}`, {}, { toastSuccessKey: 'success.week-comment.delete', toastErrorKey: 'errors.week-comment.delete' })
+}
diff --git a/migrations/Version20260417100000.php b/migrations/Version20260417100000.php
new file mode 100644
index 0000000..3d958b1
--- /dev/null
+++ b/migrations/Version20260417100000.php
@@ -0,0 +1,29 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+final class Version20260417100000 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return 'Create employee_week_comments table for per-week admin annotations on the hours weekly view';
+    }
+
+    public function up(Schema $schema): void
+    {
+        $this->addSql('CREATE TABLE employee_week_comments (id SERIAL NOT NULL, employee_id INT NOT NULL, week_start_date DATE NOT NULL, content TEXT NOT NULL, created_at TIMESTAMP(0) WITHOUT TIME ZONE NOT NULL, updated_at TIMESTAMP(0) WITHOUT TIME ZONE NOT NULL, PRIMARY KEY(id))');
+        $this->addSql('CREATE UNIQUE INDEX uniq_employee_week_comment ON employee_week_comments (employee_id, week_start_date)');
+        $this->addSql('CREATE INDEX idx_ewc_week_start ON employee_week_comments (week_start_date)');
+        $this->addSql('ALTER TABLE employee_week_comments ADD CONSTRAINT fk_ewc_employee FOREIGN KEY (employee_id) REFERENCES employees(id) ON DELETE CASCADE');
+    }
+
+    public function down(Schema $schema): void
+    {
+        $this->addSql('DROP TABLE employee_week_comments');
+    }
+}
diff --git a/src/Dto/WorkHours/WeeklySummaryRow.php b/src/Dto/WorkHours/WeeklySummaryRow.php
index e4aacc4..812f5bf 100644
--- a/src/Dto/WorkHours/WeeklySummaryRow.php
+++ b/src/Dto/WorkHours/WeeklySummaryRow.php
@@ -35,5 +35,7 @@ final class WeeklySummaryRow
         public int $weeklyOvernightCount = 0,
         public bool $hasContractForWeek = true,
         public ?string $contractNature = null,
+        public ?string $comment = null,
+        public ?int $commentId = null,
     ) {}
 }
diff --git a/src/Entity/EmployeeWeekComment.php b/src/Entity/EmployeeWeekComment.php
new file mode 100644
index 0000000..762e4f4
--- /dev/null
+++ b/src/Entity/EmployeeWeekComment.php
@@ -0,0 +1,136 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Entity;
+
+use ApiPlatform\Doctrine\Orm\Filter\DateFilter;
+use ApiPlatform\Doctrine\Orm\Filter\SearchFilter;
+use ApiPlatform\Metadata\ApiFilter;
+use ApiPlatform\Metadata\ApiResource;
+use ApiPlatform\Metadata\Delete;
+use ApiPlatform\Metadata\Get;
+use ApiPlatform\Metadata\GetCollection;
+use ApiPlatform\Metadata\Patch;
+use ApiPlatform\Metadata\Post;
+use App\Repository\EmployeeWeekCommentRepository;
+use App\State\EmployeeWeekCommentWriteProcessor;
+use DateTimeImmutable;
+use Doctrine\ORM\Mapping as ORM;
+use Symfony\Component\Serializer\Attribute\Groups;
+use Symfony\Component\Validator\Constraints as Assert;
+
+#[ApiResource(
+    operations: [
+        new Get(security: "is_granted('ROLE_ADMIN')"),
+        new GetCollection(security: "is_granted('ROLE_ADMIN')"),
+        new Post(security: "is_granted('ROLE_ADMIN')", processor: EmployeeWeekCommentWriteProcessor::class),
+        new Patch(security: "is_granted('ROLE_ADMIN')", processor: EmployeeWeekCommentWriteProcessor::class),
+        new Delete(security: "is_granted('ROLE_ADMIN')", processor: EmployeeWeekCommentWriteProcessor::class),
+    ],
+    normalizationContext: ['groups' => ['week_comment:read'], 'datetime_format' => 'Y-m-d'],
+    denormalizationContext: ['groups' => ['week_comment:write'], 'datetime_format' => 'Y-m-d'],
+    order: ['weekStartDate' => 'DESC'],
+    paginationEnabled: false,
+)]
+#[ApiFilter(DateFilter::class, properties: ['weekStartDate'])]
+#[ApiFilter(SearchFilter::class, properties: ['employee' => 'exact'])]
+#[ORM\Entity(repositoryClass: EmployeeWeekCommentRepository::class)]
+#[ORM\Table(name: 'employee_week_comments')]
+#[ORM\UniqueConstraint(name: 'uniq_employee_week_comment', columns: ['employee_id', 'week_start_date'])]
+class EmployeeWeekComment
+{
+    #[ORM\Id]
+    #[ORM\GeneratedValue]
+    #[ORM\Column(type: 'integer')]
+    #[Groups(['week_comment:read'])]
+    private ?int $id = null;
+
+    #[ORM\ManyToOne(targetEntity: Employee::class)]
+    #[ORM\JoinColumn(nullable: false, onDelete: 'CASCADE')]
+    #[Groups(['week_comment:read', 'week_comment:write'])]
+    #[Assert\NotNull]
+    private ?Employee $employee = null;
+
+    #[ORM\Column(type: 'date_immutable')]
+    #[Groups(['week_comment:read', 'week_comment:write'])]
+    #[Assert\NotNull]
+    private ?DateTimeImmutable $weekStartDate = null;
+
+    #[ORM\Column(type: 'text')]
+    #[Groups(['week_comment:read', 'week_comment:write'])]
+    #[Assert\NotBlank]
+    #[Assert\Length(max: 5000)]
+    private string $content = '';
+
+    #[ORM\Column(type: 'datetime_immutable')]
+    #[Groups(['week_comment:read'])]
+    private DateTimeImmutable $createdAt;
+
+    #[ORM\Column(type: 'datetime_immutable')]
+    #[Groups(['week_comment:read'])]
+    private DateTimeImmutable $updatedAt;
+
+    public function __construct()
+    {
+        $now             = new DateTimeImmutable();
+        $this->createdAt = $now;
+        $this->updatedAt = $now;
+    }
+
+    public function getId(): ?int
+    {
+        return $this->id;
+    }
+
+    public function getEmployee(): ?Employee
+    {
+        return $this->employee;
+    }
+
+    public function setEmployee(?Employee $employee): self
+    {
+        $this->employee = $employee;
+
+        return $this;
+    }
+
+    public function getWeekStartDate(): ?DateTimeImmutable
+    {
+        return $this->weekStartDate;
+    }
+
+    public function setWeekStartDate(?DateTimeImmutable $weekStartDate): self
+    {
+        $this->weekStartDate = $weekStartDate;
+
+        return $this;
+    }
+
+    public function getContent(): string
+    {
+        return $this->content;
+    }
+
+    public function setContent(string $content): self
+    {
+        $this->content = $content;
+
+        return $this;
+    }
+
+    public function getCreatedAt(): DateTimeImmutable
+    {
+        return $this->createdAt;
+    }
+
+    public function getUpdatedAt(): DateTimeImmutable
+    {
+        return $this->updatedAt;
+    }
+
+    public function touchUpdatedAt(): void
+    {
+        $this->updatedAt = new DateTimeImmutable();
+    }
+}
diff --git a/src/Repository/EmployeeWeekCommentRepository.php b/src/Repository/EmployeeWeekCommentRepository.php
new file mode 100644
index 0000000..9984a8d
--- /dev/null
+++ b/src/Repository/EmployeeWeekCommentRepository.php
@@ -0,0 +1,58 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Repository;
+
+use App\Entity\Employee;
+use App\Entity\EmployeeWeekComment;
+use DateTimeImmutable;
+use Doctrine\Bundle\DoctrineBundle\Repository\ServiceEntityRepository;
+use Doctrine\Persistence\ManagerRegistry;
+
+/**
+ * @extends ServiceEntityRepository<EmployeeWeekComment>
+ */
+class EmployeeWeekCommentRepository extends ServiceEntityRepository
+{
+    public function __construct(ManagerRegistry $registry)
+    {
+        parent::__construct($registry, EmployeeWeekComment::class);
+    }
+
+    public function findOneByEmployeeAndWeek(Employee $employee, DateTimeImmutable $weekStart): ?EmployeeWeekComment
+    {
+        return $this->findOneBy(['employee' => $employee, 'weekStartDate' => $weekStart]);
+    }
+
+    /**
+     * @param list<Employee> $employees
+     *
+     * @return array<int, EmployeeWeekComment> employee_id → comment
+     */
+    public function findByWeekAndEmployees(DateTimeImmutable $weekStart, array $employees): array
+    {
+        if ([] === $employees) {
+            return [];
+        }
+
+        $rows = $this->createQueryBuilder('c')
+            ->andWhere('c.weekStartDate = :weekStart')
+            ->andWhere('c.employee IN (:employees)')
+            ->setParameter('weekStart', $weekStart)
+            ->setParameter('employees', $employees)
+            ->innerJoin('c.employee', 'e')->addSelect('e')
+            ->getQuery()->getResult()
+        ;
+
+        $map = [];
+        foreach ($rows as $row) {
+            $eid = $row->getEmployee()?->getId();
+            if (null !== $eid) {
+                $map[$eid] = $row;
+            }
+        }
+
+        return $map;
+    }
+}
diff --git a/src/State/EmployeeWeekCommentWriteProcessor.php b/src/State/EmployeeWeekCommentWriteProcessor.php
new file mode 100644
index 0000000..766d8a9
--- /dev/null
+++ b/src/State/EmployeeWeekCommentWriteProcessor.php
@@ -0,0 +1,80 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\State;
+
+use ApiPlatform\Metadata\DeleteOperationInterface;
+use ApiPlatform\Metadata\Operation;
+use ApiPlatform\State\ProcessorInterface;
+use App\Entity\Employee;
+use App\Entity\EmployeeWeekComment;
+use App\Service\AuditLogger;
+use Doctrine\ORM\EntityManagerInterface;
+use Symfony\Component\DependencyInjection\Attribute\Autowire;
+use Symfony\Component\HttpKernel\Exception\UnprocessableEntityHttpException;
+
+final readonly class EmployeeWeekCommentWriteProcessor implements ProcessorInterface
+{
+    public function __construct(
+        #[Autowire(service: 'api_platform.doctrine.orm.state.persist_processor')]
+        private ProcessorInterface $persistProcessor,
+        #[Autowire(service: 'api_platform.doctrine.orm.state.remove_processor')]
+        private ProcessorInterface $removeProcessor,
+        private EntityManagerInterface $entityManager,
+        private AuditLogger $auditLogger,
+    ) {}
+
+    public function process(mixed $data, Operation $operation, array $uriVariables = [], array $context = []): mixed
+    {
+        if (!$data instanceof EmployeeWeekComment) {
+            return $data;
+        }
+
+        $employee = $data->getEmployee();
+
+        if ($operation instanceof DeleteOperationInterface) {
+            $this->auditLogger->log(
+                $employee,
+                'delete',
+                'week_comment',
+                $data->getId(),
+                sprintf('Commentaire semaine supprimé pour %s (semaine du %s)', $this->label($employee), $data->getWeekStartDate()?->format('d/m/Y') ?? '?'),
+                ['old' => ['content' => $data->getContent()]],
+                $data->getWeekStartDate(),
+            );
+            $result = $this->removeProcessor->process($data, $operation, $uriVariables, $context);
+            $this->entityManager->flush();
+
+            return $result;
+        }
+
+        $weekStart = $data->getWeekStartDate();
+        if (null === $weekStart || '1' !== $weekStart->format('N')) {
+            throw new UnprocessableEntityHttpException('weekStartDate must be a Monday (ISO weekday 1).');
+        }
+
+        $prev = null;
+        if (null !== $data->getId()) {
+            $prev = $this->entityManager->getUnitOfWork()->getOriginalEntityData($data)['content'] ?? null;
+            $data->touchUpdatedAt();
+        }
+
+        $result = $this->persistProcessor->process($data, $operation, $uriVariables, $context);
+
+        if (null === $prev) {
+            $this->auditLogger->log($employee, 'create', 'week_comment', $data->getId(), sprintf('Commentaire semaine créé pour %s (semaine du %s)', $this->label($employee), $weekStart->format('d/m/Y')), ['new' => ['content' => $data->getContent()]], $weekStart);
+        } elseif ($prev !== $data->getContent()) {
+            $this->auditLogger->log($employee, 'update', 'week_comment', $data->getId(), sprintf('Commentaire semaine modifié pour %s (semaine du %s)', $this->label($employee), $weekStart->format('d/m/Y')), ['old' => ['content' => $prev], 'new' => ['content' => $data->getContent()]], $weekStart);
+        }
+
+        $this->entityManager->flush();
+
+        return $result;
+    }
+
+    private function label(mixed $e): string
+    {
+        return $e instanceof Employee ? trim(($e->getLastName() ?? '').' '.($e->getFirstName() ?? '')) : '?';
+    }
+}
diff --git a/src/State/WorkHourWeeklySummaryProvider.php b/src/State/WorkHourWeeklySummaryProvider.php
index 4cdde2b..aeffd4a 100644
--- a/src/State/WorkHourWeeklySummaryProvider.php
+++ b/src/State/WorkHourWeeklySummaryProvider.php
@@ -13,6 +13,7 @@ use App\Dto\WorkHours\WorkMetrics;
 use App\Entity\Absence;
 use App\Entity\Contract;
 use App\Entity\Employee;
+use App\Entity\EmployeeWeekComment;
 use App\Entity\User;
 use App\Entity\WorkHour;
 use App\Enum\ContractNature;
@@ -21,6 +22,7 @@ use App\Enum\TrackingMode;
 use App\Repository\Contract\AbsenceReadRepositoryInterface;
 use App\Repository\Contract\EmployeeScopedRepositoryInterface;
 use App\Repository\Contract\WorkHourReadRepositoryInterface;
+use App\Repository\EmployeeWeekCommentRepository;
 use App\Service\Contracts\EmployeeContractResolver;
 use App\Service\WorkHours\AbsenceSegmentsResolver;
 use App\Service\WorkHours\DailyReferenceMinutesResolver;
@@ -45,6 +47,7 @@ final readonly class WorkHourWeeklySummaryProvider implements ProviderInterface
         private EmployeeContractResolver $contractResolver,
         private DailyReferenceMinutesResolver $dailyReferenceResolver,
         private HolidayVirtualHoursResolver $holidayVirtualHoursResolver,
+        private EmployeeWeekCommentRepository $weekCommentRepository,
     ) {}
 
     public function provide(Operation $operation, array $uriVariables = [], array $context = []): WorkHourWeeklySummary
@@ -62,11 +65,13 @@ final readonly class WorkHourWeeklySummaryProvider implements ProviderInterface
         $workHours = $this->workHourRepository->findByDateRangeAndEmployees($weekStart, $weekEnd, $employees);
         $absences  = $this->absenceRepository->findForPrint($weekStart, $weekEnd, $employees);
 
+        $weekComments = $this->weekCommentRepository->findByWeekAndEmployees($weekStart, $employees);
+
         $summary            = new WorkHourWeeklySummary();
         $summary->weekStart = $weekStart->format('Y-m-d');
         $summary->weekEnd   = $weekEnd->format('Y-m-d');
         $summary->days      = $days;
-        $summary->rows      = $this->buildRows($employees, $workHours, $absences, $days, $anchorDate->format('Y-m-d'));
+        $summary->rows      = $this->buildRows($employees, $workHours, $absences, $days, $anchorDate->format('Y-m-d'), $weekComments);
 
         return $summary;
     }
@@ -109,14 +114,15 @@ final readonly class WorkHourWeeklySummaryProvider implements ProviderInterface
     }
 
     /**
-     * @param list<Employee> $employees
-     * @param list<WorkHour> $workHours
-     * @param list<Absence>  $absences
-     * @param list<string>   $days
+     * @param list<Employee>                  $employees
+     * @param list<WorkHour>                  $workHours
+     * @param list<Absence>                   $absences
+     * @param list<string>                    $days
+     * @param array<int, EmployeeWeekComment> $weekComments
      *
      * @return list<WeeklySummaryRow>
      */
-    private function buildRows(array $employees, array $workHours, array $absences, array $days, string $anchorDateYmd): array
+    private function buildRows(array $employees, array $workHours, array $absences, array $days, string $anchorDateYmd, array $weekComments = []): array
     {
         $contractsByEmployeeDate       = $this->contractResolver->resolveForEmployeesAndDays($employees, $days);
         $contractNaturesByEmployeeDate = $this->contractResolver->resolveNaturesForEmployeesAndDays($employees, $days);
@@ -370,6 +376,8 @@ final readonly class WorkHourWeeklySummaryProvider implements ProviderInterface
                 weeklyOvernightCount: $weeklyOvernightCount,
                 hasContractForWeek: $hasContractForWeek,
                 contractNature: $weekAnchorContractNature->value,
+                comment: ($weekComments[$employeeId] ?? null)?->getContent(),
+                commentId: ($weekComments[$employeeId] ?? null)?->getId(),
             );
         }
 
diff --git a/tests/State/EmployeeWeekCommentWriteProcessorTest.php b/tests/State/EmployeeWeekCommentWriteProcessorTest.php
new file mode 100644
index 0000000..0e31796
--- /dev/null
+++ b/tests/State/EmployeeWeekCommentWriteProcessorTest.php
@@ -0,0 +1,76 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\State;
+
+use ApiPlatform\Metadata\Delete;
+use ApiPlatform\Metadata\Post;
+use ApiPlatform\State\ProcessorInterface;
+use App\Entity\Employee;
+use App\Entity\EmployeeWeekComment;
+use App\Service\AuditLogger;
+use App\State\EmployeeWeekCommentWriteProcessor;
+use DateTimeImmutable;
+use Doctrine\ORM\EntityManagerInterface;
+use Doctrine\ORM\UnitOfWork;
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\HttpKernel\Exception\UnprocessableEntityHttpException;
+
+/**
+ * @internal
+ */
+final class EmployeeWeekCommentWriteProcessorTest extends TestCase
+{
+    public function testRejectsNonMondayWeekStart(): void
+    {
+        $processor = new EmployeeWeekCommentWriteProcessor(
+            $this->createStub(ProcessorInterface::class),
+            $this->createStub(ProcessorInterface::class),
+            $this->createStub(EntityManagerInterface::class),
+            $this->createStub(AuditLogger::class),
+        );
+
+        $comment = new EmployeeWeekComment()
+            ->setEmployee(new Employee()->setFirstName('A')->setLastName('B'))
+            ->setWeekStartDate(new DateTimeImmutable('2026-04-14'))
+            ->setContent('test')
+        ;
+
+        $this->expectException(UnprocessableEntityHttpException::class);
+        $processor->process($comment, new Post());
+    }
+
+    public function testAcceptsMondayAndAuditsCreate(): void
+    {
+        $persist = $this->createMock(ProcessorInterface::class);
+        $persist->expects(self::once())->method('process');
+        $em = $this->createMock(EntityManagerInterface::class);
+        $em->method('getUnitOfWork')->willReturn($this->createStub(UnitOfWork::class));
+        $em->expects(self::once())->method('flush');
+        $auditor = $this->createMock(AuditLogger::class);
+        $auditor->expects(self::once())->method('log')->with(self::anything(), 'create', 'week_comment');
+
+        $processor = new EmployeeWeekCommentWriteProcessor($persist, $this->createStub(ProcessorInterface::class), $em, $auditor);
+        $processor->process(
+            new EmployeeWeekComment()->setEmployee(new Employee()->setFirstName('A')->setLastName('B'))->setWeekStartDate(new DateTimeImmutable('2026-04-13'))->setContent('x'),
+            new Post()
+        );
+    }
+
+    public function testDeleteAudits(): void
+    {
+        $remove = $this->createMock(ProcessorInterface::class);
+        $remove->expects(self::once())->method('process');
+        $em = $this->createMock(EntityManagerInterface::class);
+        $em->expects(self::once())->method('flush');
+        $auditor = $this->createMock(AuditLogger::class);
+        $auditor->expects(self::once())->method('log')->with(self::anything(), 'delete', 'week_comment');
+
+        $processor = new EmployeeWeekCommentWriteProcessor($this->createStub(ProcessorInterface::class), $remove, $em, $auditor);
+        $processor->process(
+            new EmployeeWeekComment()->setEmployee(new Employee()->setFirstName('A')->setLastName('B'))->setWeekStartDate(new DateTimeImmutable('2026-04-13'))->setContent('x'),
+            new Delete()
+        );
+    }
+}
diff --git a/tests/State/WorkHourWeeklySummaryProviderTest.php b/tests/State/WorkHourWeeklySummaryProviderTest.php
index 327ada0..9b8a0de 100644
--- a/tests/State/WorkHourWeeklySummaryProviderTest.php
+++ b/tests/State/WorkHourWeeklySummaryProviderTest.php
@@ -15,6 +15,7 @@ use App\Enum\HalfDay;
 use App\Repository\Contract\AbsenceReadRepositoryInterface;
 use App\Repository\Contract\EmployeeScopedRepositoryInterface;
 use App\Repository\Contract\WorkHourReadRepositoryInterface;
+use App\Repository\EmployeeWeekCommentRepository;
 use App\Service\Contracts\EmployeeContractResolver;
 use App\Service\PublicHolidayServiceInterface;
 use App\Service\WorkHours\AbsenceSegmentsResolver;
@@ -66,6 +67,7 @@ final class WorkHourWeeklySummaryProviderTest extends TestCase
             $this->buildResolverStub(),
             new DailyReferenceMinutesResolver(),
             $this->buildHolidayResolver(),
+            $this->buildWeekCommentRepoStub(),
         );
 
         $this->expectException(AccessDeniedHttpException::class);
@@ -128,6 +130,7 @@ final class WorkHourWeeklySummaryProviderTest extends TestCase
             $this->buildWeeklyResolverStub($employees),
             new DailyReferenceMinutesResolver(),
             $this->buildHolidayResolver(),
+            $this->buildWeekCommentRepoStub(),
         );
 
         $result = $provider->provide(new Get());
@@ -178,6 +181,14 @@ final class WorkHourWeeklySummaryProviderTest extends TestCase
         $property->setValue($entity, $id);
     }
 
+    private function buildWeekCommentRepoStub(): EmployeeWeekCommentRepository
+    {
+        $r = $this->createStub(EmployeeWeekCommentRepository::class);
+        $r->method('findByWeekAndEmployees')->willReturn([]);
+
+        return $r;
+    }
+
     private function buildHolidayResolver(array $holidayMap = []): HolidayVirtualHoursResolver
     {
         $service = $this->createStub(PublicHolidayServiceInterface::class);