app/Actions/ProjectTicketMetadata/StoreTicketLinkType.php

@@ -12,16 +12,18 @@ class StoreTicketLinkType
     use ReordersProjectMetadata;
 
     /**
-     * @param  array{name: string, position?: int|null}  $validated
+     * @param  array{name: string, counterpart_name: string, position?: int|null}  $validated
      */
     public function handle(Project $project, array $validated): TicketLinkType
     {
         $name = Arr::get($validated, 'name');
+        $counterpartName = Arr::get($validated, 'counterpart_name');
         $position = Arr::get($validated, 'position');
 
-        return DB::transaction(function () use ($project, $position, $name): TicketLinkType {
+        return DB::transaction(function () use ($project, $position, $name, $counterpartName): TicketLinkType {
             $ticketLinkType = $project->ticketLinkTypes()->create([
                 'label' => $name,
+                'counterpart_label' => $counterpartName,
                 'position' => $project->ticketLinkTypes()->count() + 1,
             ]);
 

app/Actions/ProjectTicketMetadata/UpdateTicketLinkType.php

@@ -12,16 +12,18 @@ class UpdateTicketLinkType
     use ReordersProjectMetadata;
 
     /**
-     * @param  array{name: string, position: int}  $validated
+     * @param  array{name: string, counterpart_name: string, position: int}  $validated
      */
     public function handle(Project $project, TicketLinkType $ticketLinkType, array $validated): TicketLinkType
     {
         $name = Arr::get($validated, 'name');
+        $counterpartName = Arr::get($validated, 'counterpart_name');
         $position = Arr::get($validated, 'position');
 
-        DB::transaction(function () use ($project, $name, $position, $ticketLinkType): void {
+        DB::transaction(function () use ($project, $name, $counterpartName, $position, $ticketLinkType): void {
             $ticketLinkType->update([
                 'label' => $name,
+                'counterpart_label' => $counterpartName,
             ]);
 
             $this->reorderModels(

app/Actions/Tickets/DeleteProjectTicketLink.php

@@ -23,13 +23,15 @@ class DeleteProjectTicketLink
             404,
         );
 
-        $linkedTicket = $ticketLink->source_ticket_id === $ticket->id
+        $isSourceTicket = $ticketLink->source_ticket_id === $ticket->id;
+        $linkedTicket = $isSourceTicket
             ? $ticketLink->targetTicket
             : $ticketLink->sourceTicket;
 
-        $label = $ticketLink->ticketLinkType->label;
+        $label = $ticketLink->ticketLinkType->labelForSource($isSourceTicket);
+        $counterpartLabel = $ticketLink->ticketLinkType->labelForSource(! $isSourceTicket);
 
-        DB::transaction(function () use ($label, $linkedTicket, $user, $ticket, $ticketLink): void {
+        DB::transaction(function () use ($label, $counterpartLabel, $linkedTicket, $user, $ticket, $ticketLink): void {
             $ticketLink->delete();
 
             $this->createTicketWorklogEntry->handle(
@@ -47,10 +49,10 @@ class DeleteProjectTicketLink
                 $linkedTicket,
                 $user,
                 TicketWorklogEntryType::LinkRemoved,
-                "Removed {$label} link to {$ticket->ticket_key}.",
+                "Removed {$counterpartLabel} link to {$ticket->ticket_key}.",
                 [
                     'linked_ticket_key' => $ticket->ticket_key,
-                    'ticket_link_type' => $label,
+                    'ticket_link_type' => $counterpartLabel,
                 ],
             );
         });

app/Actions/Tickets/StoreProjectTicketLink.php

@@ -28,29 +28,53 @@ class StoreProjectTicketLink
             ->where('project_id', $project->id)
             ->findOrFail($linkedTicketId);
 
-        [$sourceTicketId, $targetTicketId] = $this->normalizeTicketPair($ticket->id, $linkedTicket->id);
+        return DB::transaction(function () use ($linkedTicket, $user, $ticketLinkTypeId, $ticket): TicketLink {
+            Ticket::query()
+                ->whereKey([$ticket->id, $linkedTicket->id])
+                ->orderBy('id')
+                ->lockForUpdate()
+                ->get(['id']);
 
-        return DB::transaction(function () use ($linkedTicket, $user, $ticketLinkTypeId, $sourceTicketId, $targetTicketId, $ticket): TicketLink {
+            $ticketLink = TicketLink::query()
-            $ticketLink = TicketLink::query()->updateOrCreate(
+                ->where(function ($query) use ($ticket, $linkedTicket): void {
-                [
+                    $query
-                    'source_ticket_id' => $sourceTicketId,
+                        ->where('source_ticket_id', $ticket->id)
-                    'target_ticket_id' => $targetTicketId,
+                        ->where('target_ticket_id', $linkedTicket->id);
-                ],
+                })
-                [
+                ->orWhere(function ($query) use ($ticket, $linkedTicket): void {
+                    $query
+                        ->where('source_ticket_id', $linkedTicket->id)
+                        ->where('target_ticket_id', $ticket->id);
+                })
+                ->first();
+
+            if ($ticketLink === null) {
+                $ticketLink = TicketLink::query()->create([
+                    'source_ticket_id' => $ticket->id,
+                    'target_ticket_id' => $linkedTicket->id,
                     'ticket_link_type_id' => $ticketLinkTypeId,
-                ],
+                ]);
-            );
+            } else {
+                $ticketLink->update([
+                    'source_ticket_id' => $ticket->id,
+                    'target_ticket_id' => $linkedTicket->id,
+                    'ticket_link_type_id' => $ticketLinkTypeId,
+                ]);
+            }
 
             $ticketLink->load('ticketLinkType');
 
+            $sourceLabel = $ticketLink->ticketLinkType->labelForSource(true);
+            $targetLabel = $ticketLink->ticketLinkType->labelForSource(false);
+
             $this->createTicketWorklogEntry->handle(
                 $ticket,
                 $user,
                 TicketWorklogEntryType::LinkUpdated,
-                "Linked {$linkedTicket->ticket_key} as {$ticketLink->ticketLinkType->label}.",
+                "Linked {$linkedTicket->ticket_key} as {$sourceLabel}.",
                 [
                     'linked_ticket_key' => $linkedTicket->ticket_key,
-                    'ticket_link_type' => $ticketLink->ticketLinkType->label,
+                    'ticket_link_type' => $sourceLabel,
                 ],
             );
 
@@ -58,25 +82,14 @@ class StoreProjectTicketLink
                 $linkedTicket,
                 $user,
                 TicketWorklogEntryType::LinkUpdated,
-                "Linked {$ticket->ticket_key} as {$ticketLink->ticketLinkType->label}.",
+                "Linked {$ticket->ticket_key} as {$targetLabel}.",
                 [
                     'linked_ticket_key' => $ticket->ticket_key,
-                    'ticket_link_type' => $ticketLink->ticketLinkType->label,
+                    'ticket_link_type' => $targetLabel,
                 ],
             );
 
             return $ticketLink;
         });
     }
-
-    /**
-     * @return array{0: int, 1: int}
-     */
-    private function normalizeTicketPair(int $firstTicketId, int $secondTicketId): array
-    {
-        return [
-            min($firstTicketId, $secondTicketId),
-            max($firstTicketId, $secondTicketId),
-        ];
-    }
 }

app/Http/Controllers/Api/ProjectTicketMetadataSettingsController.php

@@ -22,10 +22,12 @@ use App\Http\Requests\DestroyProjectTicketTypeRequest;
 use App\Http\Requests\StoreProjectNamedSettingRequest;
 use App\Http\Requests\StoreProjectTicketTypeRequest;
 use App\Http\Requests\StoreTicketFieldDefinitionRequest;
+use App\Http\Requests\StoreTicketLinkTypeRequest;
 use App\Http\Requests\UpdateProjectNamedSettingRequest;
 use App\Http\Requests\UpdateProjectTicketMetadataSettings as UpdateProjectTicketMetadataSettingsRequest;
 use App\Http\Requests\UpdateProjectTicketTypeRequest;
 use App\Http\Requests\UpdateTicketFieldDefinitionRequest;
+use App\Http\Requests\UpdateTicketLinkTypeRequest;
 use App\Http\Resources\ProjectResource;
 use App\Http\Resources\TicketFieldDefinitionResource;
 use App\Http\Resources\TicketLinkTypeResource;
@@ -209,7 +211,7 @@ class ProjectTicketMetadataSettingsController extends ApiController
         return response()->json(null, 204);
     }
 
-    public function storeLinkType(StoreProjectNamedSettingRequest $request, Project $project): JsonResponse
+    public function storeLinkType(StoreTicketLinkTypeRequest $request, Project $project): JsonResponse
     {
         $this->abortUnlessCanManage($request, $project);
 
@@ -222,7 +224,7 @@ class ProjectTicketMetadataSettingsController extends ApiController
     }
 
     public function updateLinkType(
-        UpdateProjectNamedSettingRequest $request,
+        UpdateTicketLinkTypeRequest $request,
         Project $project,
         TicketLinkType $ticketLinkType,
     ): JsonResponse {

app/Http/Controllers/ProjectTicketMetadataSettingsController.php

@@ -22,10 +22,12 @@ use App\Http\Requests\DestroyProjectTicketTypeRequest;
 use App\Http\Requests\StoreProjectNamedSettingRequest;
 use App\Http\Requests\StoreProjectTicketTypeRequest;
 use App\Http\Requests\StoreTicketFieldDefinitionRequest;
+use App\Http\Requests\StoreTicketLinkTypeRequest;
 use App\Http\Requests\UpdateProjectNamedSettingRequest;
 use App\Http\Requests\UpdateProjectTicketMetadataSettings;
 use App\Http\Requests\UpdateProjectTicketTypeRequest;
 use App\Http\Requests\UpdateTicketFieldDefinitionRequest;
+use App\Http\Requests\UpdateTicketLinkTypeRequest;
 use App\Models\Project;
 use App\Models\TicketFieldDefinition;
 use App\Models\TicketLinkType;
@@ -203,7 +205,7 @@ class ProjectTicketMetadataSettingsController extends Controller
             ->with('status', "{$deletedLabel} field was removed.");
     }
 
-    public function storeLinkType(StoreProjectNamedSettingRequest $request, Project $project): RedirectResponse
+    public function storeLinkType(StoreTicketLinkTypeRequest $request, Project $project): RedirectResponse
     {
         $this->abortUnlessCanManage($request, $project);
 
@@ -214,7 +216,7 @@ class ProjectTicketMetadataSettingsController extends Controller
     }
 
     public function updateLinkType(
-        UpdateProjectNamedSettingRequest $request,
+        UpdateTicketLinkTypeRequest $request,
         Project $project,
         TicketLinkType $ticketLinkType,
     ): RedirectResponse {

app/Http/Requests/StoreTicketLinkTypeRequest.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace App\Http\Requests;
+
+use Illuminate\Contracts\Validation\ValidationRule;
+use Illuminate\Foundation\Http\FormRequest;
+
+class StoreTicketLinkTypeRequest extends FormRequest
+{
+    /**
+     * Determine if the user is authorized to make this request.
+     */
+    public function authorize(): bool
+    {
+        return $this->user() !== null;
+    }
+
+    /**
+     * Get the validation rules that apply to the request.
+     *
+     * @return array<string, ValidationRule|array<mixed>|string>
+     */
+    public function rules(): array
+    {
+        return [
+            'name' => ['required', 'string', 'max:255'],
+            'counterpart_name' => ['required', 'string', 'max:255'],
+            'position' => ['nullable', 'integer', 'min:1'],
+        ];
+    }
+}

app/Http/Requests/UpdateTicketLinkTypeRequest.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace App\Http\Requests;
+
+use Illuminate\Contracts\Validation\ValidationRule;
+use Illuminate\Foundation\Http\FormRequest;
+
+class UpdateTicketLinkTypeRequest extends FormRequest
+{
+    /**
+     * Determine if the user is authorized to make this request.
+     */
+    public function authorize(): bool
+    {
+        return $this->user() !== null;
+    }
+
+    /**
+     * Get the validation rules that apply to the request.
+     *
+     * @return array<string, ValidationRule|array<mixed>|string>
+     */
+    public function rules(): array
+    {
+        return [
+            'name' => ['required', 'string', 'max:255'],
+            'counterpart_name' => ['required', 'string', 'max:255'],
+            'position' => ['required', 'integer', 'min:1'],
+        ];
+    }
+}

app/Http/Resources/TicketLinkResource.php

@@ -18,16 +18,19 @@ class TicketLinkResource extends JsonResource
     {
         if ($this->resource instanceof TicketLink) {
             $currentTicketId = (int) ($this->resource->getAttribute('current_ticket_id') ?? 0);
-            $linkedTicket = $this->source_ticket_id === $currentTicketId
+            $isSourceTicket = $this->source_ticket_id === $currentTicketId;
+            $linkedTicket = $isSourceTicket
                 ? $this->targetTicket
                 : $this->sourceTicket;
+            $ticketLinkType = TicketLinkTypeResource::make($this->ticketLinkType)->resolve();
+            $ticketLinkType['label'] = $this->ticketLinkType->labelForSource($isSourceTicket);
 
             return [
                 'id' => $this->id,
                 'linked_ticket' => TicketReferenceResource::make($linkedTicket)->resolve(),
                 'source_ticket_id' => $this->source_ticket_id,
                 'target_ticket_id' => $this->target_ticket_id,
-                'ticket_link_type' => TicketLinkTypeResource::make($this->ticketLinkType)->resolve(),
+                'ticket_link_type' => $ticketLinkType,
                 'ticket_link_type_id' => $this->ticket_link_type_id,
                 'created_at' => $this->created_at?->toISOString(),
                 'updated_at' => $this->updated_at?->toISOString(),

app/Http/Resources/TicketLinkTypeResource.php

@@ -17,6 +17,7 @@ class TicketLinkTypeResource extends JsonResource
         return [
             'id' => $this->id,
             'label' => $this->label,
+            'counterpart_label' => $this->counterpart_label ?: $this->label,
             'position' => $this->position,
             'project_id' => $this->project_id,
             'created_at' => $this->created_at?->toISOString(),

app/Models/TicketLinkType.php

@@ -9,12 +9,22 @@ use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
 use Illuminate\Database\Eloquent\Relations\HasMany;
 
-#[Fillable(['label', 'position', 'project_id'])]
+#[Fillable(['label', 'counterpart_label', 'position', 'project_id'])]
 class TicketLinkType extends Model
 {
     /** @use HasFactory<TicketLinkTypeFactory> */
     use HasFactory;
 
+    public function counterpartLabel(): string
+    {
+        return $this->counterpart_label ?: $this->label;
+    }
+
+    public function labelForSource(bool $isSourceTicket): string
+    {
+        return $isSourceTicket ? $this->label : $this->counterpartLabel();
+    }
+
     public function project(): BelongsTo
     {
         return $this->belongsTo(Project::class);

database/factories/TicketLinkFactory.php

@@ -60,15 +60,13 @@ class TicketLinkFactory extends Factory
                     ->first()
                 ?? TicketLinkType::factory()->for($sourceTicket->project)->create([
                     'label' => 'Relates to',
+                    'counterpart_label' => 'Relates to',
                     'position' => 1,
                 ])
                 : TicketLinkType::query()->findOrFail($ticketLink->ticket_link_type_id);
 
-            $sortedIds = [$sourceTicket->id, $targetTicket->id];
+            $ticketLink->source_ticket_id = $sourceTicket->id;
-            sort($sortedIds);
+            $ticketLink->target_ticket_id = $targetTicket->id;
-
-            $ticketLink->source_ticket_id = $sortedIds[0];
-            $ticketLink->target_ticket_id = $sortedIds[1];
             $ticketLink->ticket_link_type_id = $ticketLinkType->id;
         });
     }

database/factories/TicketLinkTypeFactory.php

@@ -18,8 +18,11 @@ class TicketLinkTypeFactory extends Factory
      */
     public function definition(): array
     {
+        $label = fake()->unique()->words(2, true);
+
         return [
-            'label' => fake()->unique()->words(2, true),
+            'label' => $label,
+            'counterpart_label' => $label,
             'position' => 1,
             'project_id' => Project::factory(),
         ];

database/migrations/2026_05_23_101900_add_counterpart_label_to_ticket_link_types_table.php

@@ -0,0 +1,28 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('ticket_link_types', function (Blueprint $table) {
+            $table->string('counterpart_label')->nullable()->after('label');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('ticket_link_types', function (Blueprint $table) {
+            $table->dropColumn('counterpart_label');
+        });
+    }
+};

database/seeders/TicketLinkTypeSeeder.php

@@ -20,8 +20,8 @@ class TicketLinkTypeSeeder extends Seeder
                 TicketLinkType::factory()
                     ->count(2)
                     ->sequence(
-                        ['label' => 'Relates to', 'position' => 1],
+                        ['label' => 'Relates to', 'counterpart_label' => 'Relates to', 'position' => 1],
-                        ['label' => 'Blocks', 'position' => 2],
+                        ['label' => 'Blocks', 'counterpart_label' => 'Blocked by', 'position' => 2],
                     )
                     ->for($project)
                     ->create();

resources/js/pages/projects/settings/Board.vue

@@ -243,7 +243,7 @@ const statusAllowsTarget = (
                                                         type="checkbox"
                                                         name="allowed_ticket_status_ids[]"
                                                         :value="targetStatus.id"
-                                                        :default-checked="
+                                                        :checked="
                                                             statusAllowsTarget(
                                                                 sourceStatus,
                                                                 targetStatus,

resources/js/pages/projects/settings/Metadata.vue

@@ -652,17 +652,30 @@ const replacementTicketTypes = (ticketTypeId: number) =>
                         >
                             <div class="grid gap-2">
                                 <Label for="link-type-name">
-                                    New link type name
+                                    Source label
                                 </Label>
                                 <Input
                                     id="link-type-name"
                                     name="name"
                                     required
-                                    placeholder="Relates to"
+                                    placeholder="Blocks"
                                 />
                                 <InputError :message="errors.name" />
                             </div>
 
+                            <div class="grid gap-2">
+                                <Label for="link-type-counterpart-name">
+                                    Counterpart label
+                                </Label>
+                                <Input
+                                    id="link-type-counterpart-name"
+                                    name="counterpart_name"
+                                    required
+                                    placeholder="Blocked by"
+                                />
+                                <InputError :message="errors.counterpart_name" />
+                            </div>
+
                             <Button type="submit" :disabled="processing">
                                 Add link type
                             </Button>
@@ -686,7 +699,7 @@ const replacementTicketTypes = (ticketTypeId: number) =>
                                     <Label
                                         :for="`link-type-name-${ticketLinkType.id}`"
                                     >
-                                        Label
+                                        Source label
                                     </Label>
                                     <Input
                                         :id="`link-type-name-${ticketLinkType.id}`"
@@ -697,6 +710,23 @@ const replacementTicketTypes = (ticketTypeId: number) =>
                                     <InputError :message="errors.name" />
                                 </div>
 
+                                <div class="grid gap-2">
+                                    <Label
+                                        :for="`link-type-counterpart-name-${ticketLinkType.id}`"
+                                    >
+                                        Counterpart label
+                                    </Label>
+                                    <Input
+                                        :id="`link-type-counterpart-name-${ticketLinkType.id}`"
+                                        name="counterpart_name"
+                                        :default-value="ticketLinkType.counterpart_label"
+                                        required
+                                    />
+                                    <InputError
+                                        :message="errors.counterpart_name"
+                                    />
+                                </div>
+
                                 <div class="grid gap-2">
                                     <Label
                                         :for="`link-type-position-${ticketLinkType.id}`"

resources/js/types/models/ticket-link-type-model.ts

@@ -1,6 +1,7 @@
 export type TicketLinkTypeModel = {
     id: number;
     label: string;
+    counterpart_label: string;
     position: number;
     project_id: number;
     created_at: string;

tests/Feature/Api/SettingsApiTest.php

@@ -129,6 +129,7 @@ class SettingsApiTest extends TestCase
         $linkTypeId = $this->withApplicationKey($user)
             ->postJson(route('api.projects.settings.metadata.link-types.store', $project), [
                 'name' => 'Relates to',
+                'counterpart_name' => 'Relates to',
             ])
             ->assertCreated()
             ->json('data.id');

tests/Feature/Models/TicketLinkTest.php

@@ -20,9 +20,9 @@ class TicketLinkTest extends TestCase
     use RefreshDatabase;
 
     /**
-     * Ensure the ticket link factory normalizes the stored source and target ticket ids.
+     * Ensure the ticket link factory preserves the provided source and target direction.
      */
-    public function test_ticket_link_factory_normalizes_ticket_order(): void
+    public function test_ticket_link_factory_preserves_ticket_direction(): void
     {
         $project = Project::factory()->create([
             'key' => 'CORE',
@@ -61,8 +61,8 @@ class TicketLinkTest extends TestCase
             'ticket_link_type_id' => $ticketLinkType->id,
         ]);
 
-        $this->assertSame($firstTicket->id, $ticketLink->source_ticket_id);
+        $this->assertSame($secondTicket->id, $ticketLink->source_ticket_id);
-        $this->assertSame($secondTicket->id, $ticketLink->target_ticket_id);
+        $this->assertSame($firstTicket->id, $ticketLink->target_ticket_id);
     }
 
     /**

tests/Feature/Models/TicketLinkTypeTest.php

@@ -22,6 +22,7 @@ class TicketLinkTypeTest extends TestCase
 
         $this->assertNotNull($ticketLinkType->project_id);
         $this->assertIsString($ticketLinkType->label);
+        $this->assertSame($ticketLinkType->label, $ticketLinkType->counterpart_label);
     }
 
     /**
@@ -39,12 +40,14 @@ class TicketLinkTypeTest extends TestCase
         $this->assertDatabaseHas('ticket_link_types', [
             'project_id' => $coreProject->id,
             'label' => 'Relates to',
+            'counterpart_label' => 'Relates to',
             'position' => 1,
         ]);
 
         $this->assertDatabaseHas('ticket_link_types', [
             'project_id' => $coreProject->id,
             'label' => 'Blocks',
+            'counterpart_label' => 'Blocked by',
             'position' => 2,
         ]);
     }

tests/Feature/Projects/ProjectTicketControllerTest.php

@@ -55,6 +55,7 @@ class ProjectTicketControllerTest extends TestCase
         ]);
         $ticketLinkType = TicketLinkType::factory()->for($project)->create([
             'label' => 'Relates to',
+            'counterpart_label' => 'Relates to',
             'position' => 1,
         ]);
 
@@ -137,6 +138,7 @@ class ProjectTicketControllerTest extends TestCase
                 ->where('ticket.worklog_entries.0.actor.name', $viewer->name)
                 ->where('linkedTickets.0.linked_ticket.ticket_key', 'CORE-2')
                 ->where('linkedTickets.0.ticket_link_type.label', 'Relates to')
+                ->where('linkedTickets.0.ticket_link_type.counterpart_label', 'Relates to')
                 ->where('repositoryBranches', [])
                 ->where('repositoryPullRequests', [])
                 ->where('canEditTicket', false)
@@ -144,6 +146,62 @@ class ProjectTicketControllerTest extends TestCase
             );
     }
 
+    /**
+     * Ensure linked tickets show the counterpart label from the other ticket perspective.
+     */
+    public function test_ticket_detail_uses_counterpart_link_label_for_target_ticket(): void
+    {
+        $viewer = User::factory()->create();
+        $project = Project::factory()->create([
+            'key' => 'CORE',
+        ]);
+
+        app(InitializeProjectTicketMetadata::class)->handle($project);
+
+        $priority = $project->ticketPriorities()->firstOrFail();
+        $taskType = $project->ticketTypes()
+            ->where('is_parent', false)
+            ->orderBy('position')
+            ->firstOrFail();
+        $sourceTicket = Ticket::factory()->create([
+            'project_id' => $project->id,
+            'sequence_number' => 1,
+            'ticket_key' => 'CORE-1',
+            'ticket_priority_id' => $priority->id,
+            'ticket_type_id' => $taskType->id,
+            'title' => 'Source ticket',
+        ]);
+        $targetTicket = Ticket::factory()->create([
+            'project_id' => $project->id,
+            'sequence_number' => 2,
+            'ticket_key' => 'CORE-2',
+            'ticket_priority_id' => $priority->id,
+            'ticket_type_id' => $taskType->id,
+            'title' => 'Target ticket',
+        ]);
+        $ticketLinkType = TicketLinkType::factory()->for($project)->create([
+            'label' => 'Blocks',
+            'counterpart_label' => 'Blocked by',
+            'position' => 1,
+        ]);
+
+        TicketLink::factory()->create([
+            'source_ticket_id' => $sourceTicket->id,
+            'target_ticket_id' => $targetTicket->id,
+            'ticket_link_type_id' => $ticketLinkType->id,
+        ]);
+
+        $this->syncProjectPermissions($project, $viewer, ['view']);
+
+        $this->actingAs($viewer)
+            ->get(route('projects.tickets.show', [$project, $targetTicket]))
+            ->assertOk()
+            ->assertInertia(fn (Assert $page) => $page
+                ->where('linkedTickets.0.linked_ticket.ticket_key', 'CORE-1')
+                ->where('linkedTickets.0.ticket_link_type.label', 'Blocked by')
+                ->where('linkedTickets.0.ticket_link_type.counterpart_label', 'Blocked by'));
+    }
+
     /**
      * Ensure project admins can still inspect the author when project author visibility is disabled.
      */

tests/Feature/Projects/ProjectTicketLinkControllerTest.php

@@ -33,7 +33,8 @@ class ProjectTicketLinkControllerTest extends TestCase
             ->orderBy('position')
             ->firstOrFail();
         $ticketLinkType = TicketLinkType::factory()->for($project)->create([
-            'label' => 'Relates to',
+            'label' => 'Blocks',
+            'counterpart_label' => 'Blocked by',
             'position' => 1,
         ]);
         $ticket = Ticket::factory()->create([
@@ -59,11 +60,11 @@ class ProjectTicketLinkControllerTest extends TestCase
                 'ticket_link_type_id' => $ticketLinkType->id,
             ])
             ->assertRedirect(route('projects.tickets.show', [$project, $ticket]))
-            ->assertSessionHas('status', 'Relates to link was saved.');
+            ->assertSessionHas('status', 'Blocks link was saved.');
 
         $this->assertDatabaseHas('ticket_links', [
-            'source_ticket_id' => min($ticket->id, $linkedTicket->id),
+            'source_ticket_id' => $ticket->id,
-            'target_ticket_id' => max($ticket->id, $linkedTicket->id),
+            'target_ticket_id' => $linkedTicket->id,
             'ticket_link_type_id' => $ticketLinkType->id,
         ]);
 
@@ -71,7 +72,14 @@ class ProjectTicketLinkControllerTest extends TestCase
             'ticket_id' => $ticket->id,
             'actor_id' => $user->id,
             'entry_type' => 'link_updated',
-            'summary' => 'Linked CORE-2 as Relates to.',
+            'summary' => 'Linked CORE-2 as Blocks.',
+        ]);
+
+        $this->assertDatabaseHas('ticket_worklog_entries', [
+            'ticket_id' => $linkedTicket->id,
+            'actor_id' => $user->id,
+            'entry_type' => 'link_updated',
+            'summary' => 'Linked CORE-1 as Blocked by.',
         ]);
     }
 
@@ -99,6 +107,7 @@ class ProjectTicketLinkControllerTest extends TestCase
             ->firstOrFail();
         $ticketLinkType = TicketLinkType::factory()->for($project)->create([
             'label' => 'Relates to',
+            'counterpart_label' => 'Relates to',
             'position' => 1,
         ]);
         $ticket = Ticket::factory()->create([
@@ -137,6 +146,66 @@ class ProjectTicketLinkControllerTest extends TestCase
             ->assertSessionHasErrors('linked_ticket_id');
     }
 
+    /**
+     * Ensure relinking an existing reverse-direction pair updates the existing row instead of creating a duplicate.
+     */
+    public function test_linking_an_existing_reverse_direction_pair_reuses_the_same_row(): void
+    {
+        $user = User::factory()->create();
+        $project = Project::factory()->create([
+            'key' => 'CORE',
+        ]);
+
+        app(InitializeProjectTicketMetadata::class)->handle($project);
+
+        $priority = $project->ticketPriorities()->firstOrFail();
+        $taskType = $project->ticketTypes()
+            ->where('is_parent', false)
+            ->orderBy('position')
+            ->firstOrFail();
+        $ticketLinkType = TicketLinkType::factory()->for($project)->create([
+            'label' => 'Blocks',
+            'counterpart_label' => 'Blocked by',
+            'position' => 1,
+        ]);
+        $ticket = Ticket::factory()->create([
+            'project_id' => $project->id,
+            'sequence_number' => 1,
+            'ticket_key' => 'CORE-1',
+            'ticket_priority_id' => $priority->id,
+            'ticket_type_id' => $taskType->id,
+        ]);
+        $linkedTicket = Ticket::factory()->create([
+            'project_id' => $project->id,
+            'sequence_number' => 2,
+            'ticket_key' => 'CORE-2',
+            'ticket_priority_id' => $priority->id,
+            'ticket_type_id' => $taskType->id,
+        ]);
+        $existingLink = TicketLink::factory()->create([
+            'source_ticket_id' => $linkedTicket->id,
+            'target_ticket_id' => $ticket->id,
+            'ticket_link_type_id' => $ticketLinkType->id,
+        ]);
+
+        $this->syncProjectPermissions($project, $user, ['edit', 'view']);
+
+        $this->actingAs($user)
+            ->post(route('projects.tickets.links.store', [$project, $ticket]), [
+                'linked_ticket_id' => $linkedTicket->id,
+                'ticket_link_type_id' => $ticketLinkType->id,
+            ])
+            ->assertRedirect(route('projects.tickets.show', [$project, $ticket]))
+            ->assertSessionHas('status', 'Blocks link was saved.');
+
+        $this->assertSame(1, TicketLink::query()->count());
+
+        $existingLink->refresh();
+
+        $this->assertSame($ticket->id, $existingLink->source_ticket_id);
+        $this->assertSame($linkedTicket->id, $existingLink->target_ticket_id);
+    }
+
     /**
      * Ensure users with edit permission can remove ticket links.
      */
@@ -155,7 +224,8 @@ class ProjectTicketLinkControllerTest extends TestCase
             ->orderBy('position')
             ->firstOrFail();
         $ticketLinkType = TicketLinkType::factory()->for($project)->create([
-            'label' => 'Relates to',
+            'label' => 'Blocks',
+            'counterpart_label' => 'Blocked by',
             'position' => 1,
         ]);
         $ticket = Ticket::factory()->create([
@@ -173,8 +243,8 @@ class ProjectTicketLinkControllerTest extends TestCase
             'ticket_type_id' => $taskType->id,
         ]);
         $ticketLink = TicketLink::factory()->create([
-            'source_ticket_id' => min($ticket->id, $linkedTicket->id),
+            'source_ticket_id' => $ticket->id,
-            'target_ticket_id' => max($ticket->id, $linkedTicket->id),
+            'target_ticket_id' => $linkedTicket->id,
             'ticket_link_type_id' => $ticketLinkType->id,
         ]);
 
@@ -183,7 +253,7 @@ class ProjectTicketLinkControllerTest extends TestCase
         $this->actingAs($user)
             ->delete(route('projects.tickets.links.destroy', [$project, $ticket, $ticketLink]))
             ->assertRedirect(route('projects.tickets.show', [$project, $ticket]))
-            ->assertSessionHas('status', 'Relates to link was removed.');
+            ->assertSessionHas('status', 'Blocks link was removed.');
 
         $this->assertDatabaseMissing('ticket_links', [
             'id' => $ticketLink->id,
@@ -193,7 +263,14 @@ class ProjectTicketLinkControllerTest extends TestCase
             'ticket_id' => $ticket->id,
             'actor_id' => $user->id,
             'entry_type' => 'link_removed',
-            'summary' => 'Removed Relates to link to CORE-2.',
+            'summary' => 'Removed Blocks link to CORE-2.',
+        ]);
+
+        $this->assertDatabaseHas('ticket_worklog_entries', [
+            'ticket_id' => $linkedTicket->id,
+            'actor_id' => $user->id,
+            'entry_type' => 'link_removed',
+            'summary' => 'Removed Blocked by link to CORE-1.',
         ]);
     }
 }

tests/Feature/Projects/ProjectTicketMetadataSettingsControllerTest.php

@@ -420,6 +420,7 @@ class ProjectTicketMetadataSettingsControllerTest extends TestCase
         $project = Project::factory()->create();
         $ticketLinkType = TicketLinkType::factory()->for($project)->create([
             'label' => 'Relates to',
+            'counterpart_label' => 'Relates to',
             'position' => 1,
         ]);
 
@@ -428,18 +429,32 @@ class ProjectTicketMetadataSettingsControllerTest extends TestCase
         $this->actingAs($user)
             ->post(route('projects.settings.metadata.link-types.store', $project), [
                 'name' => 'Blocks',
+                'counterpart_name' => 'Blocked by',
             ])
             ->assertRedirect(route('projects.settings.metadata', $project))
             ->assertSessionHas('status', 'Blocks link type was added.');
 
+        $this->assertDatabaseHas('ticket_link_types', [
+            'project_id' => $project->id,
+            'label' => 'Blocks',
+            'counterpart_label' => 'Blocked by',
+        ]);
+
         $this->actingAs($user)
             ->patch(route('projects.settings.metadata.link-types.update', [$project, $ticketLinkType]), [
                 'name' => 'Depends on',
+                'counterpart_name' => 'Required by',
                 'position' => 2,
             ])
             ->assertRedirect(route('projects.settings.metadata', $project))
             ->assertSessionHas('status', 'Depends on link type was updated.');
 
+        $this->assertDatabaseHas('ticket_link_types', [
+            'id' => $ticketLinkType->id,
+            'label' => 'Depends on',
+            'counterpart_label' => 'Required by',
+        ]);
+
         $this->actingAs($user)
             ->delete(route('projects.settings.metadata.link-types.destroy', [$project, $ticketLinkType]))
             ->assertRedirect(route('projects.settings.metadata', $project))