feat(KAN-72): complete MCP ticket editing and discovery

app/Mcp/Servers/KanbanGitServer.php

@@ -3,11 +3,15 @@
 namespace App\Mcp\Servers;
 
 use App\Mcp\Tools\CreateTicket;
+use App\Mcp\Tools\GetProjectConfiguration;
 use App\Mcp\Tools\GetTicket;
 use App\Mcp\Tools\ListMyAssignedTickets;
+use App\Mcp\Tools\ListProjects;
 use App\Mcp\Tools\ListTicketsByStatus;
 use App\Mcp\Tools\ListTicketTypes;
 use App\Mcp\Tools\MoveTicketStatus;
+use App\Mcp\Tools\SearchTickets;
+use App\Mcp\Tools\UpdateTicket;
 use App\Mcp\Tools\UpdateTicketAssignee;
 use App\Mcp\Tools\UpdateTicketDescription;
 use Laravel\Mcp\Server;
@@ -16,8 +20,8 @@ use Laravel\Mcp\Server\Attributes\Name;
 use Laravel\Mcp\Server\Attributes\Version;
 
 #[Name('KanbanGit MCP')]
-#[Version('0.1.0')]
-#[Instructions('Use these tools to read, create, and update KanbanGit tickets with the authenticated application key owner permissions. Prefer stable IDs when available, especially project_id, ticket_id, ticket_type_id, and ticket_status_id. Use list_ticket_types to discover the available ticket types in a project. Use create_ticket with parent_ticket_id to create a child ticket.')]
+#[Version('0.2.0')]
+#[Instructions('Use these tools to read, create, and update KanbanGit tickets with the authenticated application key owner permissions. Prefer stable IDs when available, especially project_id, ticket_id, ticket_type_id, and ticket_status_id. Use list_projects and get_project_configuration for compact current project metadata. Get tickets by exact ticket_key or ticket_id, or search_tickets with pagination. Use update_ticket for partial edits; omitted fields are preserved, nullable scalar null clears, and supplied lists replace the entire list. Use move_ticket_status for allowed workflow transitions. Use list_ticket_types to discover the available ticket types in a project. Use create_ticket with parent_ticket_id to create a child ticket.')]
 class KanbanGitServer extends Server
 {
     protected array $tools = [
@@ -29,6 +33,10 @@ class KanbanGitServer extends Server
         MoveTicketStatus::class,
         CreateTicket::class,
         ListTicketTypes::class,
+        ListProjects::class,
+        GetProjectConfiguration::class,
+        SearchTickets::class,
+        UpdateTicket::class,
     ];
 
     protected array $resources = [

app/Mcp/Support/KanbanGitMcp.php

@@ -13,6 +13,7 @@ use App\Models\TicketStatus;
 use App\Models\User;
 use Illuminate\Auth\Access\AuthorizationException;
 use Illuminate\Auth\AuthenticationException;
+use Illuminate\Contracts\Pagination\LengthAwarePaginator;
 use Illuminate\Support\Collection;
 use Illuminate\Validation\ValidationException;
 use Laravel\Mcp\Request;
@@ -78,6 +79,17 @@ class KanbanGitMcp
         return $ticket;
     }
 
+    public function ticketForKey(User $user, string $ticketKey): Ticket
+    {
+        $ticket = Ticket::query()->with('project')->where('ticket_key', $ticketKey)->first();
+        if ($ticket === null || $ticket->ticket_key !== $ticketKey) {
+            throw ValidationException::withMessages(['ticket_key' => 'Ticket was not found.']);
+        }
+        $this->ensureCanRead($user, $ticket->project);
+
+        return $ticket;
+    }
+
     /**
      * @throws AuthorizationException
      */
@@ -201,6 +213,18 @@ class KanbanGitMcp
         ));
     }
 
+    /** @return array{current_page: int, per_page: int, total: int, last_page: int, has_more_pages: bool} */
+    public function paginationPayload(LengthAwarePaginator $paginator): array
+    {
+        return [
+            'current_page' => $paginator->currentPage(),
+            'per_page' => $paginator->perPage(),
+            'total' => $paginator->total(),
+            'last_page' => $paginator->lastPage(),
+            'has_more_pages' => $paginator->hasMorePages(),
+        ];
+    }
+
     /**
      * @return array<string, mixed>
      */

app/Mcp/Support/TicketUpdateInput.php

@@ -0,0 +1,108 @@
+<?php
+
+namespace App\Mcp\Support;
+
+use App\Actions\Tickets\Support\AcceptanceCriteriaChecklistMapper;
+use App\Http\Requests\UpdateProjectTicketRequest;
+use App\Models\Ticket;
+use App\Models\TicketFieldDefinition;
+use App\Models\User;
+use Illuminate\Routing\Route;
+use Illuminate\Support\Arr;
+use Illuminate\Support\Facades\Validator;
+use Illuminate\Validation\Rule;
+use Illuminate\Validation\ValidationException;
+use Laravel\Mcp\Request;
+
+class TicketUpdateInput
+{
+    public function __construct(private readonly KanbanGitMcp $kanbanGitMcp) {}
+
+    /** @return array<string, mixed> */
+    public function validate(Request $request, Ticket $ticket, User $user): array
+    {
+        $form = new UpdateProjectTicketRequest;
+        $route = new Route('PUT', '/', fn () => null);
+        $route->bind(\Illuminate\Http\Request::create('/', 'PUT'));
+        $route->setParameter('project', $ticket->project);
+        $route->setParameter('ticket', $ticket);
+        $form->setRouteResolver(fn () => $route);
+        $form->setUserResolver(fn () => $user);
+        $rules = $form->rules();
+        foreach ($rules as $key => &$rule) {
+            if (! str_contains($key, '.')) {
+                $rule = ['sometimes', ...$rule];
+            }
+        }
+        unset($rule);
+        $rules['acceptance_criteria'] = ['sometimes', 'array', 'list'];
+        $rules['acceptance_criteria.*'] = ['array:id,text,checked,indent'];
+        $rules['acceptance_criteria.*.id'] = ['sometimes', 'integer', 'min:1', 'distinct', Rule::exists('acceptance_criteria', 'id')->where('ticket_id', $ticket->id)];
+        $rules['acceptance_criteria.*.checked'] = ['sometimes', 'boolean'];
+        $rules['acceptance_criteria.*.indent'] = ['sometimes', 'integer', 'min:0', 'max:'.AcceptanceCriteriaChecklistMapper::MAX_INDENT_LEVEL];
+        $rules['field_values'] = ['sometimes', 'array', 'list'];
+        $rules['field_values.*'] = ['array:ticket_field_definition_id,value_number,value_user_id'];
+        $rules['field_values.*.ticket_field_definition_id'][] = 'distinct';
+        $rules['ticket_status_id'] = ['prohibited'];
+        $rules['acceptance_criteria.*.text'][] = function (string $attribute, mixed $value, \Closure $fail): void {
+            if (is_string($value) && trim($value) === '') {
+                $fail('Criterion text must not be blank.');
+            }
+        };
+        $input = $request->validate($rules);
+        $previousIndent = -1;
+        foreach (Arr::get($input, 'acceptance_criteria', []) as $index => $item) {
+            $indent = Arr::get($item, 'indent', 0);
+            if ($indent > $previousIndent + 1) {
+                throw ValidationException::withMessages(["acceptance_criteria.{$index}.indent" => 'Indentation cannot skip a level; the first item must have indent 0.']);
+            }
+            $previousIndent = $indent;
+        }
+        $merged = array_replace($this->kanbanGitMcp->updatePayload($ticket), $input);
+        $merged['acceptance_criteria'] = Arr::exists($input, 'acceptance_criteria')
+            ? AcceptanceCriteriaChecklistMapper::normalize($input['acceptance_criteria'])
+            : AcceptanceCriteriaChecklistMapper::fromModelsWithIds($ticket->acceptanceCriteria()->get());
+
+        $validator = Validator::make($merged, $form->rules());
+        $form->setValidator($validator);
+        $validator->validate();
+        foreach ($form->after() as $callback) {
+            $callback($validator);
+        }
+
+        $people = User::query()->visibleToProject($ticket->project)->pluck('id')->all();
+        foreach (['assignee_user_id', 'author_user_id'] as $field) {
+            if (Arr::exists($input, $field) && $input[$field] !== null && ! in_array((int) $input[$field], $people, true)) {
+                $validator->errors()->add($field, 'The person must be able to view this project.');
+            }
+        }
+        $definitions = $ticket->project->ticketFieldDefinitions()->get()->keyBy('id');
+        foreach (Arr::get($input, 'field_values', []) as $index => $value) {
+            $definition = $definitions->get($value['ticket_field_definition_id']);
+            $incompatible = $definition->field_type === 'user' ? 'value_number' : 'value_user_id';
+            if (Arr::get($value, $incompatible) !== null) {
+                $validator->errors()->add("field_values.{$index}.{$incompatible}", 'The value must match the custom field type.');
+            }
+            if (Arr::get($value, 'value_user_id') !== null && ! in_array((int) $value['value_user_id'], $people, true)) {
+                $validator->errors()->add("field_values.{$index}.value_user_id", 'The person must be able to view this project.');
+            }
+        }
+        if ($validator->errors()->isNotEmpty()) {
+            throw new ValidationException($validator);
+        }
+
+        if (Arr::exists($input, 'field_values')) {
+            $replacement = $definitions->map(fn (TicketFieldDefinition $definition): array => [
+                'ticket_field_definition_id' => $definition->id,
+                'value_number' => null,
+                'value_user_id' => null,
+            ])->all();
+            foreach ($input['field_values'] as $value) {
+                $replacement[$value['ticket_field_definition_id']] = $value;
+            }
+            $merged['field_values'] = array_values($replacement);
+        }
+
+        return $merged;
+    }
+}

app/Mcp/Tools/GetProjectConfiguration.php

@@ -0,0 +1,75 @@
+<?php
+
+namespace App\Mcp\Tools;
+
+use App\Actions\Permissions\PermissionService;
+use App\Enums\Permission;
+use App\Mcp\Support\KanbanGitMcp;
+use App\Models\TicketStatus;
+use App\Models\User;
+use Illuminate\Contracts\JsonSchema\JsonSchema;
+use Illuminate\JsonSchema\Types\Type;
+use Laravel\Mcp\Request;
+use Laravel\Mcp\Response;
+use Laravel\Mcp\ResponseFactory;
+use Laravel\Mcp\Server\Attributes\Description;
+use Laravel\Mcp\Server\Attributes\Name;
+use Laravel\Mcp\Server\Tool;
+use Laravel\Mcp\Server\Tools\Annotations\IsReadOnly;
+
+#[Name('get_project_configuration')]
+#[Description('Get compact current configuration for a visible project: ordered columns, statuses with IDs/slugs/column assignment and allowed target status IDs, types, priorities, custom field definitions, and permitted people IDs/names. Reads live effective configuration, without template snapshots or full user/project objects. People are paginated (default 25, maximum 100); use people_page for subsequent pages. Author changes require project admin permission, reported in permissions.')]
+#[IsReadOnly]
+class GetProjectConfiguration extends Tool
+{
+    public function __construct(private readonly KanbanGitMcp $kanbanGitMcp, private readonly PermissionService $permissionService) {}
+
+    public function handle(Request $request): Response|ResponseFactory
+    {
+        $input = $request->validate([
+            'project_id' => ['required', 'integer'],
+            'people_page' => ['sometimes', 'integer', 'min:1'],
+            'people_per_page' => ['sometimes', 'integer', 'min:1', 'max:100'],
+        ]);
+        $user = $this->kanbanGitMcp->user($request);
+        $project = $this->kanbanGitMcp->projectForRead($user, $input['project_id']);
+        $people = User::query()->visibleToProject($project)->orderBy('id')->paginate($input['people_per_page'] ?? 25, ['id', 'name'], 'people_page', $input['people_page'] ?? 1);
+
+        $columns = $project->boardColumns()->orderBy('id')->get(['id', 'name', 'position']);
+        $columnPositions = $columns->pluck('position', 'id');
+        $statuses = $project->ticketStatuses()->with('allowedTargetStatuses')->get()->sortBy(
+            fn (TicketStatus $status): array => [$columnPositions->get($status->board_column_id, 0), $status->position, $status->id],
+        )->values();
+
+        return Response::structured([
+            'data' => [
+                'project' => ['id' => $project->id, 'key' => $project->key, 'name' => $project->name],
+                'permissions' => [
+                    'can_write' => $this->permissionService->allows($user, Permission::ProjectWrite, $project),
+                    'can_change_author' => $this->permissionService->allows($user, Permission::ProjectAdmin, $project),
+                ],
+                'board_columns' => $columns->toArray(),
+                'ticket_statuses' => $statuses->map(fn (TicketStatus $status): array => [
+                    'id' => $status->id, 'name' => $status->name, 'slug' => $status->slug,
+                    'position' => $status->position, 'board_column_id' => $status->board_column_id,
+                    'allowed_target_status_ids' => $status->allowedTargetStatuses->pluck('id')->all(),
+                ])->all(),
+                'ticket_types' => $project->ticketTypes()->orderBy('id')->get(['id', 'name', 'position', 'is_parent'])->toArray(),
+                'ticket_priorities' => $project->ticketPriorities()->orderBy('id')->get(['id', 'name', 'position'])->toArray(),
+                'ticket_field_definitions' => $project->ticketFieldDefinitions()->orderBy('id')->get(['id', 'label', 'field_type', 'position'])->toArray(),
+                'people' => $people->getCollection()->map(fn (User $person): array => ['id' => $person->id, 'name' => $person->name])->all(),
+            ],
+            'meta' => ['people' => $this->kanbanGitMcp->paginationPayload($people)],
+        ]);
+    }
+
+    /** @return array<string, Type> */
+    public function schema(JsonSchema $schema): array
+    {
+        return [
+            'project_id' => $schema->integer()->description('Visible project ID from list_projects.')->required(),
+            'people_page' => $schema->integer()->min(1)->description('People page number, defaults to 1.'),
+            'people_per_page' => $schema->integer()->min(1)->max(100)->description('People page size, defaults to 25; maximum 100.'),
+        ];
+    }
+}

app/Mcp/Tools/GetTicket.php

@@ -14,7 +14,7 @@ use Laravel\Mcp\Server\Tool;
 use Laravel\Mcp\Server\Tools\Annotations\IsReadOnly;
 
 #[Name('get_ticket')]
-#[Description('Get a visible ticket with project, status, type, priority, assignee, author, field values, and worklog data.')]
+#[Description('Get a visible ticket by exactly one of numeric ticket_id or exact full ticket_key (e.g. KAN-67), with project, status, type, priority, assignee, author, field values, and worklog data.')]
 #[IsReadOnly]
 class GetTicket extends Tool
 {
@@ -25,11 +25,14 @@ class GetTicket extends Tool
     public function handle(Request $request): Response|ResponseFactory
     {
         $validated = $request->validate([
-            'ticket_id' => ['required', 'integer'],
+            'ticket_id' => ['required_without:ticket_key', 'prohibits:ticket_key', 'integer'],
+            'ticket_key' => ['required_without:ticket_id', 'prohibits:ticket_id', 'string', 'regex:/^[A-Z0-9]+-[1-9][0-9]*$/'],
         ]);
 
         $user = $this->kanbanGitMcp->user($request);
-        $ticket = $this->kanbanGitMcp->ticketForRead($user, (int) $validated['ticket_id']);
+        $ticket = isset($validated['ticket_id'])
+            ? $this->kanbanGitMcp->ticketForRead($user, (int) $validated['ticket_id'])
+            : $this->kanbanGitMcp->ticketForKey($user, $validated['ticket_key']);
 
         return Response::structured([
             'data' => $this->kanbanGitMcp->ticketPayload($ticket),
@@ -43,8 +46,8 @@ class GetTicket extends Tool
     {
         return [
             'ticket_id' => $schema->integer()
-                ->description('Ticket ID.')
-                ->required(),
+                ->description('Ticket ID. Supply exactly one of ticket_id or ticket_key.'),
+            'ticket_key' => $schema->string()->description('Exact full ticket key, e.g. KAN-67. Supply exactly one of ticket_id or ticket_key.'),
         ];
     }
 }

app/Mcp/Tools/ListProjects.php

@@ -0,0 +1,46 @@
+<?php
+
+namespace App\Mcp\Tools;
+
+use App\Actions\Permissions\PermissionService;
+use App\Mcp\Support\KanbanGitMcp;
+use App\Models\Project;
+use Illuminate\Contracts\JsonSchema\JsonSchema;
+use Illuminate\JsonSchema\Types\Type;
+use Laravel\Mcp\Request;
+use Laravel\Mcp\Response;
+use Laravel\Mcp\ResponseFactory;
+use Laravel\Mcp\Server\Attributes\Description;
+use Laravel\Mcp\Server\Attributes\Name;
+use Laravel\Mcp\Server\Tool;
+use Laravel\Mcp\Server\Tools\Annotations\IsReadOnly;
+
+#[Name('list_projects')]
+#[Description('List visible projects independently of assigned tickets. Returns only ID, key and name, ordered by ID, with bounded pagination. page starts at 1; per_page defaults to 25 and may not exceed 100.')]
+#[IsReadOnly]
+class ListProjects extends Tool
+{
+    public function __construct(private readonly KanbanGitMcp $kanbanGitMcp, private readonly PermissionService $permissionService) {}
+
+    public function handle(Request $request): Response|ResponseFactory
+    {
+        $input = $request->validate(['page' => ['sometimes', 'integer', 'min:1'], 'per_page' => ['sometimes', 'integer', 'min:1', 'max:100']]);
+        $user = $this->kanbanGitMcp->user($request);
+        $projects = Project::query()->whereIn('id', $this->permissionService->viewableProjectIds($user))
+            ->orderBy('id')->paginate($input['per_page'] ?? 25, ['id', 'key', 'name'], 'page', $input['page'] ?? 1);
+
+        return Response::structured([
+            'data' => $projects->getCollection()->map(fn (Project $project): array => ['id' => $project->id, 'key' => $project->key, 'name' => $project->name])->all(),
+            'meta' => $this->kanbanGitMcp->paginationPayload($projects),
+        ]);
+    }
+
+    /** @return array<string, Type> */
+    public function schema(JsonSchema $schema): array
+    {
+        return [
+            'page' => $schema->integer()->min(1)->description('Page number, defaults to 1.'),
+            'per_page' => $schema->integer()->min(1)->max(100)->description('Page size, defaults to 25; maximum 100.'),
+        ];
+    }
+}

app/Mcp/Tools/SearchTickets.php

@@ -0,0 +1,83 @@
+<?php
+
+namespace App\Mcp\Tools;
+
+use App\Actions\Permissions\PermissionService;
+use App\Mcp\Support\KanbanGitMcp;
+use App\Models\Ticket;
+use Illuminate\Contracts\JsonSchema\JsonSchema;
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\JsonSchema\Types\Type;
+use Illuminate\Support\Arr;
+use Laravel\Mcp\Request;
+use Laravel\Mcp\Response;
+use Laravel\Mcp\ResponseFactory;
+use Laravel\Mcp\Server\Attributes\Description;
+use Laravel\Mcp\Server\Attributes\Name;
+use Laravel\Mcp\Server\Tool;
+use Laravel\Mcp\Server\Tools\Annotations\IsReadOnly;
+
+#[Name('search_tickets')]
+#[Description('Search visible tickets with combined filters: exact full ticket key, literal text in title/description, project, status, type, assignee and parent. Omitted filters do not restrict results; assignee_user_id/parent_ticket_id null selects unassigned/top-level tickets. Returns compact ID, key, title, project ID and status with deterministic ID order and bounded pagination (default 25, maximum 100).')]
+#[IsReadOnly]
+class SearchTickets extends Tool
+{
+    public function __construct(private readonly KanbanGitMcp $kanbanGitMcp, private readonly PermissionService $permissionService) {}
+
+    public function handle(Request $request): Response|ResponseFactory
+    {
+        $input = $request->validate([
+            'ticket_key' => ['sometimes', 'string', 'regex:/^[A-Z0-9]+-[1-9][0-9]*$/'],
+            'query' => ['sometimes', 'string', 'max:255'],
+            'project_id' => ['sometimes', 'integer'],
+            'ticket_status_id' => ['sometimes', 'integer'],
+            'ticket_type_id' => ['sometimes', 'integer'],
+            'assignee_user_id' => ['sometimes', 'nullable', 'integer'],
+            'parent_ticket_id' => ['sometimes', 'nullable', 'integer'],
+            'page' => ['sometimes', 'integer', 'min:1'],
+            'per_page' => ['sometimes', 'integer', 'min:1', 'max:100'],
+        ]);
+        $user = $this->kanbanGitMcp->user($request);
+        $this->kanbanGitMcp->projectForRead($user, $input['project_id'] ?? null);
+        $query = Ticket::query()->whereIn('project_id', $this->permissionService->viewableProjectIds($user));
+        foreach (['ticket_key', 'project_id', 'ticket_status_id', 'ticket_type_id', 'assignee_user_id', 'parent_ticket_id'] as $filter) {
+            if (Arr::exists($input, $filter)) {
+                $query->where($filter, $input[$filter]);
+            }
+        }
+        if (Arr::exists($input, 'query')) {
+            $pattern = '%'.str_replace(['!', '%', '_'], ['!!', '!%', '!_'], $input['query']).'%';
+            $query->where(fn (Builder $q) => $q->whereRaw("title LIKE ? ESCAPE '!'", [$pattern])->orWhereRaw("description LIKE ? ESCAPE '!'", [$pattern]));
+        }
+        $tickets = $query->with('ticketStatus:id,name,slug,board_column_id')->orderBy('id')
+            ->paginate($input['per_page'] ?? 25, ['id', 'ticket_key', 'title', 'project_id', 'ticket_status_id'], 'page', $input['page'] ?? 1);
+
+        return Response::structured([
+            'data' => $tickets->getCollection()->map(fn (Ticket $ticket): array => [
+                'id' => $ticket->id,
+                'ticket_key' => $ticket->ticket_key,
+                'title' => $ticket->title,
+                'project_id' => $ticket->project_id,
+                'ticket_status_id' => $ticket->ticket_status_id,
+                'status' => $ticket->ticketStatus === null ? null : ['id' => $ticket->ticketStatus->id, 'name' => $ticket->ticketStatus->name, 'slug' => $ticket->ticketStatus->slug],
+            ])->all(),
+            'meta' => $this->kanbanGitMcp->paginationPayload($tickets),
+        ]);
+    }
+
+    /** @return array<string, Type> */
+    public function schema(JsonSchema $schema): array
+    {
+        return [
+            'ticket_key' => $schema->string()->description('Exact full key, e.g. KAN-67.'),
+            'query' => $schema->string()->max(255)->description('Literal substring in title or description.'),
+            'project_id' => $schema->integer()->description('Visible project ID.'),
+            'ticket_status_id' => $schema->integer()->description('Status ID from get_project_configuration.'),
+            'ticket_type_id' => $schema->integer()->description('Type ID from get_project_configuration.'),
+            'assignee_user_id' => $schema->integer()->nullable()->description('Assignee ID; null selects unassigned tickets.'),
+            'parent_ticket_id' => $schema->integer()->nullable()->description('Parent ID; null selects top-level tickets.'),
+            'page' => $schema->integer()->min(1)->description('Page number, defaults to 1.'),
+            'per_page' => $schema->integer()->min(1)->max(100)->description('Page size, defaults to 25; maximum 100.'),
+        ];
+    }
+}

app/Mcp/Tools/UpdateTicket.php

@@ -0,0 +1,71 @@
+<?php
+
+namespace App\Mcp\Tools;
+
+use App\Actions\Tickets\UpdateProjectTicket;
+use App\Mcp\Support\KanbanGitMcp;
+use App\Mcp\Support\TicketUpdateInput;
+use Illuminate\Contracts\JsonSchema\JsonSchema;
+use Illuminate\JsonSchema\Types\Type;
+use Laravel\Mcp\Request;
+use Laravel\Mcp\Response;
+use Laravel\Mcp\ResponseFactory;
+use Laravel\Mcp\Server\Attributes\Description;
+use Laravel\Mcp\Server\Attributes\Name;
+use Laravel\Mcp\Server\Tool;
+use Laravel\Mcp\Server\Tools\Annotations\IsDestructive;
+
+#[Name('update_ticket')]
+#[Description('Partially update a ticket by ID using existing project permissions and ticket rules. Omitted fields stay unchanged. Explicit null clears nullable scalar fields only. acceptance_criteria and field_values replace their entire lists; [] clears a list and null is rejected. Checklist items with an existing ID retain their identity; omit id for a new item. Use move_ticket_status separately for workflow transitions. Author changes require project admin permission; people must be visible to the project.')]
+#[IsDestructive(false)]
+class UpdateTicket extends Tool
+{
+    public function __construct(
+        private readonly KanbanGitMcp $kanbanGitMcp,
+        private readonly TicketUpdateInput $ticketUpdateInput,
+        private readonly UpdateProjectTicket $updateProjectTicket,
+    ) {}
+
+    public function handle(Request $request): Response|ResponseFactory
+    {
+        $selector = $request->validate(['ticket_id' => ['required', 'integer']]);
+        $user = $this->kanbanGitMcp->user($request);
+        $ticket = $this->kanbanGitMcp->ticketForWrite($user, (int) $selector['ticket_id']);
+        $validated = $this->ticketUpdateInput->validate($request, $ticket, $user);
+        $updated = $this->updateProjectTicket->handle($ticket, $user, $validated, true);
+
+        return Response::structured([
+            'data' => $this->kanbanGitMcp->ticketPayload($ticket->fresh()),
+            'meta' => ['updated' => $updated],
+        ]);
+    }
+
+    /** @return array<string, Type> */
+    public function schema(JsonSchema $schema): array
+    {
+        return [
+            'ticket_id' => $schema->integer()->description('Existing ticket ID.')->required(),
+            'title' => $schema->string()->max(255)->description('Nonblank title; omit to preserve.'),
+            'description' => $schema->string()->nullable()->description('Description; null clears it.'),
+            'ticket_type_id' => $schema->integer()->description('Type ID from get_project_configuration.'),
+            'ticket_priority_id' => $schema->integer()->description('Priority ID from get_project_configuration.'),
+            'parent_ticket_id' => $schema->integer()->nullable()->description('Parent-enabled ticket in this project; null removes the parent. Cycles are forbidden.'),
+            'assignee_user_id' => $schema->integer()->nullable()->description('Allowed person ID; null unassigns.'),
+            'author_user_id' => $schema->integer()->nullable()->description('Author ID; null clears. Changes require project admin permission.'),
+            'story_points' => $schema->integer()->min(0)->nullable()->description('Nonnegative estimate; null clears.'),
+            'is_blocked' => $schema->boolean()->description('Blocked state; true requires a nonblank blocker comment. Omit to preserve.'),
+            'blocked_comment' => $schema->string()->nullable()->description('Blocker reason; null clears only when the ticket is unblocked.'),
+            'acceptance_criteria' => $schema->array()->items($schema->object([
+                'id' => $schema->integer()->min(1)->description('Existing criterion ID belonging to this ticket. Omit for a new item. IDs must be unique.'),
+                'text' => $schema->string()->description('Nonblank criterion text.')->required(),
+                'checked' => $schema->boolean()->description('Checked state, defaults to false for supplied items.'),
+                'indent' => $schema->integer()->min(0)->max(8)->description('Indent level, defaults to 0; cannot skip a level.'),
+            ])->withoutAdditionalProperties())->description('Ordered replacement checklist. Omitted items are removed. [] clears; omit field to preserve; null is invalid.'),
+            'field_values' => $schema->array()->items($schema->object([
+                'ticket_field_definition_id' => $schema->integer()->description('Project field ID, supplied once.')->required(),
+                'value_number' => $schema->number()->nullable()->description('Value for a numeric field; null clears.'),
+                'value_user_id' => $schema->integer()->nullable()->description('Allowed person ID for a user field; null clears.'),
+            ])->withoutAdditionalProperties())->description('Replacement custom-field list. Omitted definitions are cleared. [] clears all; omit field to preserve; null is invalid.'),
+        ];
+    }
+}