diff --git a/resources/js/components/tickets/detail/TicketDetailBlocker.vue b/resources/js/components/tickets/detail/TicketDetailBlocker.vue
new file mode 100644
index 0000000..a3ce18a
--- /dev/null
+++ b/resources/js/components/tickets/detail/TicketDetailBlocker.vue
@@ -0,0 +1,204 @@
+<script setup lang="ts">
+import { useForm } from '@inertiajs/vue3';
+import { computed } from 'vue';
+import ProjectTicketController from '@/actions/App/Http/Controllers/ProjectTicketController';
+import FormFeedback from '@/components/FormFeedback.vue';
+import InputError from '@/components/InputError.vue';
+import TicketFormField from '@/components/tickets/TicketFormField.vue';
+import { Badge } from '@/components/ui/badge';
+import { Button } from '@/components/ui/button';
+import {
+    Card,
+    CardContent,
+    CardDescription,
+    CardHeader,
+} from '@/components/ui/card';
+import { Label } from '@/components/ui/label';
+import { useFormProtection } from '@/composables/useFormProtection';
+import { useLocalization } from '@/composables/useLocalization';
+import type { TicketDetailBlockerProps } from '@/types/ticket-detail';
+
+const props = defineProps<TicketDetailBlockerProps>();
+const { t } = useLocalization();
+
+const savedFormData = () => ({
+    acceptance_criteria: props.ticket.acceptance_criteria,
+    assignee_user_id: props.ticket.assignee_user_id,
+    blocked_comment: props.ticket.blocked_comment ?? '',
+    description: props.ticket.description,
+    field_values: (props.ticket.field_values ?? []).map((fieldValue) => ({
+        ticket_field_definition_id: fieldValue.ticket_field_definition_id,
+        value_number: fieldValue.value_number,
+        value_user_id: fieldValue.value_user_id,
+    })),
+    is_blocked: props.ticket.is_blocked,
+    parent_ticket_id: props.ticket.parent_ticket_id,
+    story_points: props.ticket.story_points,
+    ticket_priority_id: props.ticket.ticket_priority_id,
+    ticket_type_id: props.ticket.ticket_type_id,
+    title: props.ticket.title,
+});
+
+const form = useForm(
+    `projects:${props.project.id}:tickets:${props.ticket.id}:blocker`,
+    savedFormData(),
+);
+const protection = useFormProtection(form);
+const isBlocked = computed(() => Boolean(form.is_blocked));
+
+const reset = (): void => {
+    if (form.processing || !protection.confirmLeave()) {
+        return;
+    }
+
+    form.reset();
+    form.clearErrors();
+    protection.clearFeedback();
+};
+
+const submit = (): void => {
+    if (!props.canEditTicket || form.processing) {
+        return;
+    }
+
+    protection.submit(
+        ProjectTicketController.update({
+            project: props.project.id,
+            ticket: props.ticket.id,
+        }),
+        {
+            preserveScroll: true,
+            onSuccess: () => {
+                Object.assign(form, savedFormData());
+                form.defaults();
+            },
+        },
+    );
+};
+</script>
+
+<template>
+    <section
+        id="ticket-blocker"
+        aria-labelledby="ticket-blocker-title"
+        class="min-w-0 scroll-mt-6"
+    >
+        <Card :class="{ 'border-warning/40': isBlocked }">
+            <CardHeader>
+                <div class="flex flex-wrap items-center justify-between gap-3">
+                    <h2 id="ticket-blocker-title" class="text-lg font-semibold">
+                        {{ t('ticketDetail.blocker') }}
+                    </h2>
+                    <Badge :variant="isBlocked ? 'warning' : 'outline'">
+                        {{
+                            isBlocked
+                                ? t('ticketDetail.blockerActive')
+                                : t('ticketDetail.blockerInactive')
+                        }}
+                    </Badge>
+                </div>
+                <CardDescription>
+                    {{ t('ticketDetail.blockerDescription') }}
+                </CardDescription>
+            </CardHeader>
+
+            <CardContent v-if="canEditTicket">
+                <form class="grid min-w-0 gap-5" @submit.prevent="submit">
+                    <FormFeedback
+                        :state="protection.state.value"
+                        @retry="submit"
+                    />
+
+                    <div
+                        class="bg-muted/30 flex min-w-0 items-start gap-3 rounded-xl border p-4"
+                    >
+                        <input
+                            id="is_blocked"
+                            v-model="form.is_blocked"
+                            type="checkbox"
+                            :disabled="form.processing"
+                            :aria-invalid="Boolean(form.errors.is_blocked)"
+                            aria-describedby="ticket-blocker-state-description is_blocked-error"
+                            class="border-input text-primary focus-visible:ring-ring mt-0.5 size-4 shrink-0 rounded focus-visible:ring-2"
+                        />
+                        <div class="grid min-w-0 gap-1">
+                            <Label for="is_blocked">
+                                {{ t('ticketDetail.blocked') }}
+                            </Label>
+                            <p
+                                id="ticket-blocker-state-description"
+                                class="text-muted-foreground text-sm"
+                            >
+                                {{
+                                    isBlocked
+                                        ? t(
+                                              'ticketDetail.blockerActiveDescription',
+                                          )
+                                        : t(
+                                              'ticketDetail.blockerInactiveDescription',
+                                          )
+                                }}
+                            </p>
+                        </div>
+                    </div>
+                    <InputError
+                        id="is_blocked-error"
+                        :message="form.errors.is_blocked"
+                    />
+
+                    <TicketFormField
+                        v-if="isBlocked"
+                        id="blocked_comment"
+                        v-model="form.blocked_comment"
+                        kind="textarea"
+                        :rows="3"
+                        :label="t('ticketDetail.blockerComment')"
+                        :hint="t('ticketDetail.blockerCommentHelp')"
+                        :placeholder="t('ticketDetail.blockerPlaceholder')"
+                        :error="form.errors.blocked_comment"
+                        :disabled="form.processing"
+                        required
+                    />
+
+                    <div
+                        class="flex flex-col-reverse gap-3 sm:flex-row sm:justify-end"
+                    >
+                        <Button
+                            type="button"
+                            variant="outline"
+                            :disabled="!form.isDirty || form.processing"
+                            @click="reset"
+                        >
+                            {{ t('ticketDetail.resetBlocker') }}
+                        </Button>
+                        <Button
+                            type="submit"
+                            :loading="form.processing"
+                            :loading-label="t('ticketDetail.savingBlocker')"
+                            :disabled="!form.isDirty"
+                        >
+                            {{
+                                isBlocked
+                                    ? t('ticketDetail.saveBlocker')
+                                    : t('ticketDetail.unblockTicket')
+                            }}
+                        </Button>
+                    </div>
+                </form>
+            </CardContent>
+
+            <CardContent v-else>
+                <p
+                    class="whitespace-pre-wrap text-sm leading-6"
+                    :class="{ 'text-muted-foreground': !isBlocked }"
+                >
+                    {{
+                        isBlocked
+                            ? ticket.blocked_comment
+                            : t('ticketDetail.blockerInactiveDescription')
+                    }}
+                </p>
+            </CardContent>
+        </Card>
+    </section>
+</template>
diff --git a/resources/js/components/tickets/detail/TicketDetailContent.vue b/resources/js/components/tickets/detail/TicketDetailContent.vue
index 35012dd..4f6c36c 100644
--- a/resources/js/components/tickets/detail/TicketDetailContent.vue
+++ b/resources/js/components/tickets/detail/TicketDetailContent.vue
@@ -3,14 +3,13 @@ import { useLocalization } from '@/composables/useLocalization';
 import { Card, CardContent, CardHeader } from '@/components/ui/card';
 
 import { useForm, useRemember } from '@inertiajs/vue3';
-import { computed, ref, toRef, unref } from 'vue';
+import { computed, ref, toRef, unref, watch } from 'vue';
 import ProjectTicketController from '@/actions/App/Http/Controllers/ProjectTicketController';
 import InputError from '@/components/InputError.vue';
 import FormFeedback from '@/components/FormFeedback.vue';
 import { Button } from '@/components/ui/button';
 import TicketFormField from '@/components/tickets/TicketFormField.vue';
 import TicketFormFields from '@/components/tickets/TicketFormFields.vue';
-import { Label } from '@/components/ui/label';
 import { useFormProtection } from '@/composables/useFormProtection';
 import {
     acceptanceCriteriaToEditorState,
@@ -77,6 +76,16 @@ const savedFormData = () => ({
 
 const form = useForm(draftKey, savedFormData());
 
+watch(
+    () => [props.ticket.is_blocked, props.ticket.blocked_comment] as const,
+    ([isBlocked, blockedComment]) => {
+        form.is_blocked = isBlocked;
+        form.blocked_comment = blockedComment ?? '';
+        form.defaults('is_blocked', isBlocked);
+        form.defaults('blocked_comment', blockedComment ?? '');
+    },
+);
+
 const acceptanceCriteriaPreviewItems = computed(
     () => savedAcceptanceCriteria.value,
 );
@@ -459,44 +468,6 @@ const submit = (): void => {
                             />
                         </template>
                     </TicketFormFields>
-                    <fieldset
-                        class="grid min-w-0 gap-4 rounded-xl border p-4 sm:p-5"
-                        :disabled="
-                            form.processing ||
-                            isPersistingAcceptanceCriteriaToggle
-                        "
-                    >
-                        <legend class="px-2 text-sm font-semibold">
-                            {{ t('ticketForm.blocker') }}
-                        </legend>
-                        <div class="min-h-control flex items-center gap-3">
-                            <input
-                                id="is_blocked"
-                                v-model="form.is_blocked"
-                                type="checkbox"
-                                :aria-invalid="Boolean(form.errors.is_blocked)"
-                                aria-describedby="is_blocked-error"
-                                class="border-input text-primary focus-visible:ring-ring size-4 rounded focus-visible:ring-2"
-                            />
-                            <Label for="is_blocked">{{
-                                t('ticketDetail.blocked')
-                            }}</Label>
-                        </div>
-                        <InputError
-                            id="is_blocked-error"
-                            :message="form.errors.is_blocked"
-                        />
-                        <TicketFormField
-                            id="blocked_comment"
-                            v-model="form.blocked_comment"
-                            kind="textarea"
-                            :rows="3"
-                            :label="t('ticketDetail.blockerComment')"
-                            :placeholder="t('ticketDetail.blockerPlaceholder')"
-                            :error="form.errors.blocked_comment"
-                            :required="form.is_blocked"
-                        />
-                    </fieldset>
                     <fieldset
                         class="grid min-w-0 gap-4 rounded-xl border p-4 sm:p-5"
                         :disabled="
diff --git a/resources/js/components/tickets/detail/TicketDetailHeader.vue b/resources/js/components/tickets/detail/TicketDetailHeader.vue
index 4f42ec6..c1898a5 100644
--- a/resources/js/components/tickets/detail/TicketDetailHeader.vue
+++ b/resources/js/components/tickets/detail/TicketDetailHeader.vue
@@ -15,6 +15,7 @@ const sections = [
     'description',
     'checklist',
     'metadata',
+    'blocker',
     'relationships',
     'history',
     'git',
diff --git a/resources/js/components/tickets/detail/TicketDetailHistory.vue b/resources/js/components/tickets/detail/TicketDetailHistory.vue
index fa788c7..fd35174 100644
--- a/resources/js/components/tickets/detail/TicketDetailHistory.vue
+++ b/resources/js/components/tickets/detail/TicketDetailHistory.vue
@@ -8,11 +8,21 @@ import {
 } from '@/components/ui/card';
 
 import { Badge } from '@/components/ui/badge';
+import { UserAvatar } from '@/components/ui/avatar';
 import type { TicketDetailHistoryProps } from '@/types/ticket-detail';
+import type { TranslationKey } from '@/types/localization';
+import type { TicketWorklogEntryType } from '@/types/models/ticket-worklog-entry-model';
 defineProps<TicketDetailHistoryProps>();
 const { t, date } = useLocalization();
 const formatDateTime = (value: string): string =>
     date(new Date(value), { dateStyle: 'medium', timeStyle: 'short' });
+const entryTypeLabels: Record<TicketWorklogEntryType, TranslationKey> = {
+    created: 'ticketDetail.historyType.created',
+    link_removed: 'ticketDetail.historyType.linkRemoved',
+    link_updated: 'ticketDetail.historyType.linkUpdated',
+    status_changed: 'ticketDetail.historyType.statusChanged',
+    updated: 'ticketDetail.historyType.updated',
+};
 </script>
 
 <template>
@@ -39,31 +49,70 @@ const formatDateTime = (value: string): string =>
                     {{ t('ticketDetail.noHistory') }}
                 </div>
 
-                <div v-else class="flex flex-col gap-4">
-                    <div
+                <ol v-else class="relative grid gap-0" role="list">
+                    <li
                         v-for="worklogEntry in ticket.worklog_entries"
                         :key="worklogEntry.id"
-                        class="border-border rounded-xl border px-4 py-4"
+                        class="border-border relative grid min-w-0 grid-cols-[2.5rem_minmax(0,1fr)] gap-3 border-l pb-6 last:border-transparent last:pb-0 sm:grid-cols-[3rem_minmax(0,1fr)] sm:gap-4"
                     >
-                        <div class="flex flex-wrap items-center gap-2">
-                            <Badge variant="outline">
-                                {{ worklogEntry.entry_type }}
-                            </Badge>
-                            <span class="text-foreground text-sm font-medium">
-                                {{
-                                    worklogEntry.actor?.name ??
-                                    t('ticketDetail.system')
-                                }}
+                        <div
+                            class="bg-card relative -left-px flex size-10 -translate-x-1/2 items-center justify-center rounded-full sm:size-12"
+                        >
+                            <UserAvatar
+                                v-if="worklogEntry.actor"
+                                :user="worklogEntry.actor"
+                                size="lg"
+                            />
+                            <span
+                                v-else
+                                aria-hidden="true"
+                                class="bg-muted text-muted-foreground flex size-10 items-center justify-center rounded-full border text-sm font-semibold"
+                            >
+                                S
                             </span>
                         </div>
-                        <p class="text-foreground mt-3 text-sm">
-                            {{ worklogEntry.summary }}
-                        </p>
-                        <p class="text-muted-foreground mt-2 text-xs">
-                            {{ formatDateTime(worklogEntry.created_at) }}
-                        </p>
-                    </div>
-                </div>
+                        <article
+                            class="bg-muted/20 min-w-0 rounded-xl border p-4"
+                        >
+                            <div
+                                class="flex min-w-0 flex-col gap-2 sm:flex-row sm:items-start sm:justify-between"
+                            >
+                                <div
+                                    class="flex min-w-0 flex-wrap items-center gap-2"
+                                >
+                                    <span
+                                        class="text-foreground text-sm font-semibold"
+                                    >
+                                        {{
+                                            worklogEntry.actor?.name ??
+                                            t('ticketDetail.system')
+                                        }}
+                                    </span>
+                                    <Badge variant="outline">
+                                        {{
+                                            t(
+                                                entryTypeLabels[
+                                                    worklogEntry.entry_type
+                                                ],
+                                            )
+                                        }}
+                                    </Badge>
+                                </div>
+                                <time
+                                    :datetime="worklogEntry.created_at"
+                                    class="text-muted-foreground shrink-0 text-xs"
+                                >
+                                    {{
+                                        formatDateTime(worklogEntry.created_at)
+                                    }}
+                                </time>
+                            </div>
+                            <p class="text-foreground mt-3 text-sm leading-6">
+                                {{ worklogEntry.summary }}
+                            </p>
+                        </article>
+                    </li>
+                </ol>
             </CardContent>
         </Card>
     </section>
diff --git a/resources/js/locales/en.ts b/resources/js/locales/en.ts
index 6679c8f..c1c1571 100644
--- a/resources/js/locales/en.ts
+++ b/resources/js/locales/en.ts
@@ -401,9 +401,24 @@ export const en = {
     'ticketDetail.checklistPlaceholder':
         '[ ] User can sign in\n  [x] Validation is shown for invalid credentials',
     'ticketDetail.blocked': 'Mark ticket as blocked',
+    'ticketDetail.blocker': 'Blocker',
+    'ticketDetail.blockerDescription':
+        'Record whether progress is blocked and why. Changes are added to the ticket worklog.',
+    'ticketDetail.blockerActive': 'Blocked',
+    'ticketDetail.blockerInactive': 'Not blocked',
+    'ticketDetail.blockerActiveDescription':
+        'A blocker reason is required while this ticket is blocked.',
+    'ticketDetail.blockerInactiveDescription':
+        'This ticket currently has no active blocker.',
     'ticketDetail.blockerComment': 'Blocker comment',
+    'ticketDetail.blockerCommentHelp':
+        'Explain the concrete dependency or decision preventing progress.',
     'ticketDetail.blockerPlaceholder':
         'Describe what currently blocks progress on this ticket.',
+    'ticketDetail.saveBlocker': 'Save blocker',
+    'ticketDetail.unblockTicket': 'Unblock ticket',
+    'ticketDetail.resetBlocker': 'Discard blocker changes',
+    'ticketDetail.savingBlocker': 'Saving blocker…',
     'ticketDetail.customFields': 'Custom fields',
     'ticketDetail.customFieldsDescription':
         'Project-configured fields can be tracked directly on the ticket.',
@@ -461,6 +476,11 @@ export const en = {
         'Every tracked ticket change is recorded with actor and timestamp.',
     'ticketDetail.noHistory': 'No worklog entries exist for this ticket yet.',
     'ticketDetail.system': 'System',
+    'ticketDetail.historyType.created': 'Ticket created',
+    'ticketDetail.historyType.updated': 'Ticket updated',
+    'ticketDetail.historyType.statusChanged': 'Status changed',
+    'ticketDetail.historyType.linkUpdated': 'Link added',
+    'ticketDetail.historyType.linkRemoved': 'Link removed',
     'ticketDetail.sourceBranch': 'Source branch: {name}',
     'ticketForm.create': 'Create ticket',
     'ticketForm.pageTitle': 'Create {project} ticket',
diff --git a/resources/js/pages/projects/Ticket.vue b/resources/js/pages/projects/Ticket.vue
index 629922b..acd367b 100644
--- a/resources/js/pages/projects/Ticket.vue
+++ b/resources/js/pages/projects/Ticket.vue
@@ -1,6 +1,7 @@
 <script setup lang="ts">
 import { Head } from '@inertiajs/vue3';
 import { computed } from 'vue';
+import TicketDetailBlocker from '@/components/tickets/detail/TicketDetailBlocker.vue';
 import TicketDetailContent from '@/components/tickets/detail/TicketDetailContent.vue';
 import TicketDetailGit from '@/components/tickets/detail/TicketDetailGit.vue';
 import TicketDetailHeader from '@/components/tickets/detail/TicketDetailHeader.vue';
@@ -62,7 +63,7 @@ const breadcrumbs = computed<BreadcrumbItem[]>(() => [
                 />
                 <aside
                     :aria-label="t('ticketDetail.metadata')"
-                    class="min-w-0 xl:col-start-2 xl:row-span-4 xl:row-start-1"
+                    class="min-w-0 xl:col-start-2 xl:row-span-5 xl:row-start-1"
                 >
                     <TicketDetailMetadata
                         :ticket="ticket"
@@ -71,6 +72,12 @@ const breadcrumbs = computed<BreadcrumbItem[]>(() => [
                         :ticket-field-definitions="ticketFieldDefinitions"
                     />
                 </aside>
+                <TicketDetailBlocker
+                    :ticket="ticket"
+                    :project="project"
+                    :can-edit-ticket="canEditTicket"
+                    class="xl:col-start-1"
+                />
                 <TicketDetailRelationships
                     :ticket="ticket"
                     :project="project"
diff --git a/resources/js/types/ticket-detail.ts b/resources/js/types/ticket-detail.ts
index 389ca6d..6fe0f86 100644
--- a/resources/js/types/ticket-detail.ts
+++ b/resources/js/types/ticket-detail.ts
@@ -15,6 +15,10 @@ export type TicketDetailContentProps = Pick<
     | 'ticketTypes'
     | 'users'
 >;
+export type TicketDetailBlockerProps = Pick<
+    ProjectTicketPageProps,
+    'ticket' | 'project' | 'canEditTicket'
+>;
 export type TicketDetailMetadataProps = Pick<
     ProjectTicketPageProps,
     'ticket' | 'project' | 'canManageProject' | 'ticketFieldDefinitions'
diff --git a/tests/Fixtures/ticket-detail-browser.mjs b/tests/Fixtures/ticket-detail-browser.mjs
index 85f91f6..1fd4d6e 100644
--- a/tests/Fixtures/ticket-detail-browser.mjs
+++ b/tests/Fixtures/ticket-detail-browser.mjs
@@ -101,6 +101,63 @@ try {
     }
     await page.setViewportSize({ width: 390, height: 1000 });
     await visit();
+    const blocker = content().locator('#ticket-blocker');
+    const blockerToggle = blocker.getByRole('checkbox', {
+        name: 'Mark ticket as blocked',
+        exact: true,
+    });
+    const blockerComment = blocker.getByLabel('Blocker comment', {
+        exact: true,
+    });
+    assert.equal(await blockerToggle.isChecked(), true);
+    assert.equal(
+        await blocker.getByText('Alex Morgan', { exact: true }).count(),
+        0,
+    );
+    assert.equal(
+        await content()
+            .locator('#ticket-history')
+            .getByText('Alex Morgan', { exact: true })
+            .count(),
+        1,
+    );
+    assert.equal(
+        await content()
+            .locator('#ticket-history')
+            .getByText('Status changed', { exact: true })
+            .count(),
+        1,
+    );
+    await blockerComment.fill('');
+    assert.equal(
+        await blockerComment.evaluate(
+            (element) => element.validity.valueMissing,
+        ),
+        true,
+    );
+    await blockerComment.fill('Waiting for a production decision.');
+    await blocker.getByRole('button', { name: 'Save blocker' }).click();
+    await page.getByText('Ticket updated.', { exact: true }).waitFor();
+    assert.equal(
+        await blockerComment.inputValue(),
+        'Waiting for a production decision.',
+    );
+    assert.equal(
+        await content()
+            .locator('#ticket-metadata')
+            .getByText('Alex Morgan', { exact: true })
+            .count(),
+        2,
+    );
+    await blockerToggle.uncheck();
+    await blocker.getByRole('button', { name: 'Unblock ticket' }).click();
+    await blocker
+        .getByText('This ticket currently has no active blocker.', {
+            exact: true,
+        })
+        .waitFor();
+    assert.equal(await blocker.getByLabel('Blocker comment').count(), 0);
+    await visit();
     await tabTo(edit());
     await page.keyboard.press('Enter');
     await page.getByLabel('Title', { exact: true }).fill('Unsaved title draft');
diff --git a/tests/Fixtures/ticket-detail.mjs b/tests/Fixtures/ticket-detail.mjs
index 6260d63..90aecb1 100644
--- a/tests/Fixtures/ticket-detail.mjs
+++ b/tests/Fixtures/ticket-detail.mjs
@@ -108,9 +108,18 @@ const ticket = {
         },
     ],
     worklog_entries: [
+        {
+            id: 2,
+            actor: null,
+            actor_id: null,
+            entry_type: 'status_changed',
+            summary: 'Moved from Backlog to Delivery / In progress.',
+            created_at: '2026-09-11T13:00:00Z',
+        },
         {
             id: 1,
             actor: user,
+            actor_id: user.id,
             entry_type: 'created',
             summary: 'Ticket created in the project backlog.',
             created_at: '2026-09-11T12:00:00Z',
@@ -361,7 +370,19 @@ if (serve) {
                 if (params.has('reject')) {
                     params.set('rejected', '1');
                 } else {
-                    savedForm = data;
+                    savedForm = {
+                        ...data,
+                        blocked_comment: data.is_blocked
+                            ? data.blocked_comment
+                            : null,
+                        field_values: data.field_values.map((fieldValue) => ({
+                            ...fieldValue,
+                            user_value:
+                                Number(fieldValue.value_user_id) === user.id
+                                    ? user
+                                    : null,
+                        })),
+                    };
                     params.set('saved', data.title);
                 }
             }
@@ -442,6 +463,9 @@ if (serve) {
             'feature/ENG-42-cache',
             'Cache implementation',
             'Ticket created in the project backlog.',
+            'Ticket created',
+            'Status changed',
+            'System',
         ]) {
             assert.ok(
                 html.includes(text),
@@ -452,6 +476,7 @@ if (serve) {
             'description',
             'checklist',
             'metadata',
+            'blocker',
             'relationships',
             'history',
             'git',