Add batched update_project_items writes via GraphQL

README.md

@@ -1119,6 +1119,7 @@ The following sets of tools are available:
   - `item_owner`: The owner (user or organization) of the repository containing the issue or pull request. Required for 'add_project_item' method. Also accepted by 'update_project_item' when resolving the item by issue number. (string, optional)
   - `item_repo`: The name of the repository containing the issue or pull request. Required for 'add_project_item' method. Also accepted by 'update_project_item' when resolving the item by issue number. (string, optional)
   - `item_type`: The item's type, either issue or pull_request. Required for 'add_project_item' method. (string, optional)
+  - `items`: The items to update with the top-level 'updated_field'. Required for 'update_project_items'; prefer it over calling 'update_project_item' in a loop. Each entry must match exactly one reference variant: 'node_id', numeric 'item_id', or 'item_owner' + 'item_repo' + 'issue_number'. Limit: 100 items per call. (object[], optional)
   - `iteration_duration`: Duration in days for iterations of the field (e.g. 7 for weekly, 14 for bi-weekly). Required for 'create_iteration_field' method. (number, optional)
   - `iterations`: Custom iterations for 'create_iteration_field' method. Only set this when you need iterations with varying durations, breaks between them, or specific titles. Otherwise omit it: GitHub auto-creates three iterations of 'iteration_duration' days starting on 'start_date', which is the right choice for most cases. (object[], optional)
   - `method`: The method to execute (string, required)
@@ -1130,7 +1131,7 @@ The following sets of tools are available:
   - `status`: The status of the project. Used for 'create_project_status_update' method. (string, optional)
   - `target_date`: The target date of the status update in YYYY-MM-DD format. Used for 'create_project_status_update' method. (string, optional)
   - `title`: The project title. Required for 'create_project' method. (string, optional)
-  - `updated_field`: Object describing the field to update and its new value. Required for 'update_project_item'. Two shapes are accepted: (1) by ID — {"id": 123456, "value": "..."}; (2) by name — {"name": "Status", "value": "In Progress"}. For single-select fields, option-name resolution requires the by-name shape; on the by-ID shape, pass the option ID. Set value to null to clear the field. (object, optional)
+  - `updated_field`: The field/value to apply, using {"id": 123, "value": ...} or {"name": "Status", "value": ...}; null clears the field. Required for 'update_project_item' and 'update_project_items', where one top-level field/value applies to every item in a batch. For 'update_project_item' SINGLE_SELECT fields, the name form accepts option names; the ID form expects an option ID. (object, optional)
 
 </details>
 

pkg/github/__toolsnaps__/projects_write.snap

@@ -5,7 +5,7 @@
     "readOnlyHint": false,
     "title": "Manage GitHub Projects"
   },
-  "description": "Create and manage GitHub Projects: create projects, add/update/delete items, create status updates, and add iteration fields.",
+  "description": "Create and manage GitHub Projects: create projects, add/update/delete items, bulk-update many items at once, create status updates, and add iteration fields.",
   "inputSchema": {
     "properties": {
       "body": {
@@ -40,6 +40,64 @@
         ],
         "type": "string"
       },
+      "items": {
+        "description": "The items to update with the top-level 'updated_field'. Required for 'update_project_items'; prefer it over calling 'update_project_item' in a loop. Each entry must match exactly one reference variant: 'node_id', numeric 'item_id', or 'item_owner' + 'item_repo' + 'issue_number'. Limit: 100 items per call.",
+        "items": {
+          "oneOf": [
+            {
+              "additionalProperties": false,
+              "properties": {
+                "node_id": {
+                  "description": "The project item's GraphQL node ID, as returned by 'list_project_items' or 'add_project_item'.",
+                  "type": "string"
+                }
+              },
+              "required": [
+                "node_id"
+              ],
+              "type": "object"
+            },
+            {
+              "additionalProperties": false,
+              "properties": {
+                "item_id": {
+                  "description": "The numeric project item ID.",
+                  "type": "integer"
+                }
+              },
+              "required": [
+                "item_id"
+              ],
+              "type": "object"
+            },
+            {
+              "additionalProperties": false,
+              "properties": {
+                "issue_number": {
+                  "description": "Issue number used to resolve the project item.",
+                  "type": "integer"
+                },
+                "item_owner": {
+                  "description": "Owner of the repository containing the issue.",
+                  "type": "string"
+                },
+                "item_repo": {
+                  "description": "Repository containing the issue.",
+                  "type": "string"
+                }
+              },
+              "required": [
+                "item_owner",
+                "item_repo",
+                "issue_number"
+              ],
+              "type": "object"
+            }
+          ],
+          "type": "object"
+        },
+        "type": "array"
+      },
       "iteration_duration": {
         "description": "Duration in days for iterations of the field (e.g. 7 for weekly, 14 for bi-weekly). Required for 'create_iteration_field' method.",
         "type": "number"
@@ -76,6 +134,7 @@
         "enum": [
           "add_project_item",
           "update_project_item",
+          "update_project_items",
           "delete_project_item",
           "create_project_status_update",
           "create_project",
@@ -127,7 +186,43 @@
         "type": "string"
       },
       "updated_field": {
-        "description": "Object describing the field to update and its new value. Required for 'update_project_item'. Two shapes are accepted: (1) by ID — {\"id\": 123456, \"value\": \"...\"}; (2) by name — {\"name\": \"Status\", \"value\": \"In Progress\"}. For single-select fields, option-name resolution requires the by-name shape; on the by-ID shape, pass the option ID. Set value to null to clear the field.",
+        "description": "The field/value to apply, using {\"id\": 123, \"value\": ...} or {\"name\": \"Status\", \"value\": ...}; null clears the field. Required for 'update_project_item' and 'update_project_items', where one top-level field/value applies to every item in a batch. For 'update_project_item' SINGLE_SELECT fields, the name form accepts option names; the ID form expects an option ID.",
+        "oneOf": [
+          {
+            "additionalProperties": false,
+            "properties": {
+              "id": {
+                "description": "The numeric project field ID.",
+                "type": "integer"
+              },
+              "value": {
+                "description": "The value to apply. Any JSON value is accepted; use null to clear the field."
+              }
+            },
+            "required": [
+              "id",
+              "value"
+            ],
+            "type": "object"
+          },
+          {
+            "additionalProperties": false,
+            "properties": {
+              "name": {
+                "description": "The project field name. Matching is case-insensitive.",
+                "type": "string"
+              },
+              "value": {
+                "description": "The value to apply. Any JSON value is accepted; use null to clear the field."
+              }
+            },
+            "required": [
+              "name",
+              "value"
+            ],
+            "type": "object"
+          }
+        ],
         "type": "object"
       }
     },

pkg/github/projects.go

@@ -32,6 +32,7 @@ const (
 	ProjectStatusUpdateCreateFailedError = "failed to create project status update"
 	ProjectResolveIDFailedError          = "failed to resolve project ID"
 	MaxProjectsPerPage                   = 50
+	maxProjectItemsPerBatch              = 100
 )
 
 // Method constants for consolidated project tools
@@ -44,6 +45,7 @@ const (
 	projectsMethodGetProjectItem            = "get_project_item"
 	projectsMethodAddProjectItem            = "add_project_item"
 	projectsMethodUpdateProjectItem         = "update_project_item"
+	projectsMethodUpdateProjectItems        = "update_project_items"
 	projectsMethodDeleteProjectItem         = "delete_project_item"
 	projectsMethodListProjectStatusUpdates  = "list_project_status_updates"
 	projectsMethodGetProjectStatusUpdate    = "get_project_status_update"
@@ -490,13 +492,90 @@ Use this tool to get details about individual projects, project fields, and proj
 	return tool
 }
 
+func updateProjectItemsItemSchema() *jsonschema.Schema {
+	variant := func(required []string, properties map[string]*jsonschema.Schema) *jsonschema.Schema {
+		return &jsonschema.Schema{
+			Type:                 "object",
+			AdditionalProperties: &jsonschema.Schema{Not: &jsonschema.Schema{}},
+			Properties:           properties,
+			Required:             required,
+		}
+	}
+
+	return &jsonschema.Schema{
+		Type: "object",
+		OneOf: []*jsonschema.Schema{
+			variant([]string{"node_id"}, map[string]*jsonschema.Schema{
+				"node_id": {
+					Type:        "string",
+					Description: "The project item's GraphQL node ID, as returned by 'list_project_items' or 'add_project_item'.",
+				},
+			}),
+			variant([]string{"item_id"}, map[string]*jsonschema.Schema{
+				"item_id": {
+					Type:        "integer",
+					Description: "The numeric project item ID.",
+				},
+			}),
+			variant([]string{"item_owner", "item_repo", "issue_number"}, map[string]*jsonschema.Schema{
+				"item_owner": {
+					Type:        "string",
+					Description: "Owner of the repository containing the issue.",
+				},
+				"item_repo": {
+					Type:        "string",
+					Description: "Repository containing the issue.",
+				},
+				"issue_number": {
+					Type:        "integer",
+					Description: "Issue number used to resolve the project item.",
+				},
+			}),
+		},
+	}
+}
+
+func projectUpdatedFieldSchema() *jsonschema.Schema {
+	value := &jsonschema.Schema{
+		Description: "The value to apply. Any JSON value is accepted; use null to clear the field.",
+	}
+	variant := func(required []string, properties map[string]*jsonschema.Schema) *jsonschema.Schema {
+		properties["value"] = value
+		return &jsonschema.Schema{
+			Type:                 "object",
+			AdditionalProperties: &jsonschema.Schema{Not: &jsonschema.Schema{}},
+			Properties:           properties,
+			Required:             required,
+		}
+	}
+
+	return &jsonschema.Schema{
+		Type:        "object",
+		Description: "The field/value to apply, using {\"id\": 123, \"value\": ...} or {\"name\": \"Status\", \"value\": ...}; null clears the field. Required for 'update_project_item' and 'update_project_items', where one top-level field/value applies to every item in a batch. For 'update_project_item' SINGLE_SELECT fields, the name form accepts option names; the ID form expects an option ID.",
+		OneOf: []*jsonschema.Schema{
+			variant([]string{"id", "value"}, map[string]*jsonschema.Schema{
+				"id": {
+					Type:        "integer",
+					Description: "The numeric project field ID.",
+				},
+			}),
+			variant([]string{"name", "value"}, map[string]*jsonschema.Schema{
+				"name": {
+					Type:        "string",
+					Description: "The project field name. Matching is case-insensitive.",
+				},
+			}),
+		},
+	}
+}
+
 // ProjectsWrite returns the tool and handler for modifying GitHub Projects resources.
 func ProjectsWrite(t translations.TranslationHelperFunc) inventory.ServerTool {
 	tool := NewTool(
 		ToolsetMetadataProjects,
 		mcp.Tool{
 			Name:        "projects_write",
-			Description: t("TOOL_PROJECTS_WRITE_DESCRIPTION", "Create and manage GitHub Projects: create projects, add/update/delete items, create status updates, and add iteration fields."),
+			Description: t("TOOL_PROJECTS_WRITE_DESCRIPTION", "Create and manage GitHub Projects: create projects, add/update/delete items, bulk-update many items at once, create status updates, and add iteration fields."),
 			Annotations: &mcp.ToolAnnotations{
 				Title:           t("TOOL_PROJECTS_WRITE_USER_TITLE", "Manage GitHub Projects"),
 				ReadOnlyHint:    false,
@@ -511,6 +590,7 @@ func ProjectsWrite(t translations.TranslationHelperFunc) inventory.ServerTool {
 						Enum: []any{
 							projectsMethodAddProjectItem,
 							projectsMethodUpdateProjectItem,
+							projectsMethodUpdateProjectItems,
 							projectsMethodDeleteProjectItem,
 							projectsMethodCreateProjectStatusUpdate,
 							projectsMethodCreateProject,
@@ -559,9 +639,11 @@ func ProjectsWrite(t translations.TranslationHelperFunc) inventory.ServerTool {
 						Type:        "number",
 						Description: "The pull request number (use when item_type is 'pull_request' for 'add_project_item' method). Provide either issue_number or pull_request_number.",
 					},
-					"updated_field": {
-						Type:        "object",
-						Description: "Object describing the field to update and its new value. Required for 'update_project_item'. Two shapes are accepted: (1) by ID — {\"id\": 123456, \"value\": \"...\"}; (2) by name — {\"name\": \"Status\", \"value\": \"In Progress\"}. For single-select fields, option-name resolution requires the by-name shape; on the by-ID shape, pass the option ID. Set value to null to clear the field.",
+					"updated_field": projectUpdatedFieldSchema(),
+					"items": {
+						Type:        "array",
+						Description: "The items to update with the top-level 'updated_field'. Required for 'update_project_items'; prefer it over calling 'update_project_item' in a loop. Each entry must match exactly one reference variant: 'node_id', numeric 'item_id', or 'item_owner' + 'item_repo' + 'issue_number'. Limit: " + strconv.Itoa(maxProjectItemsPerBatch) + " items per call.",
+						Items:       updateProjectItemsItemSchema(),
 					},
 					"body": {
 						Type:        "string",
@@ -722,6 +804,8 @@ func ProjectsWrite(t translations.TranslationHelperFunc) inventory.ServerTool {
 					return utils.NewToolResultError("updated_field must be an object"), nil, nil
 				}
 				return updateProjectItem(ctx, client, gqlClient, owner, ownerType, projectNumber, itemID, fieldValue)
+			case projectsMethodUpdateProjectItems:
+				return updateProjectItemsBatch(ctx, client, gqlClient, owner, ownerType, projectNumber, args)
 			case projectsMethodDeleteProjectItem:
 				itemID, err := RequiredBigInt(args, "item_id")
 				if err != nil {