SamMorrowDrums · Oct 6, 2026 · Oct 2, 2026 · Oct 2, 2026 · Oct 5, 2026 · Oct 2, 2026
@@ -616,6 +616,12 @@ The following sets of tools are available:
 
 ## Tools
 
+Repository tools expose output schemas and typed `structuredContent` to clients using MCP protocol `2026-07-28` or later. Older clients, or clients with an unknown protocol version, receive the existing content without an output schema or structured output.
+
+For `get_file_contents`, directory results (including field projections) are structured arrays. File downloads and metadata-only responses use a `content` array of typed text, embedded-resource, or resource-link blocks, preserving status messages, text, base64 blobs, empty files, and download links. Text-only repository mutations such as starring and deletion also return a structured `message`; fork responses distinguish a repository reference from an in-progress message. Repository deletion still requires its existing confirmation flow before returning a completed result.
+
+Structured repository results use compact DTOs rather than raw REST objects. Release lookups share the compact release shape with release listings; Git references retain the ref, object type, and SHA; annotated tags retain tag/message/tagger/target information; deletion commits retain SHA, message, authors, tree SHA, parent SHAs, and a human-facing `html_url` when available. Directory entries retain file metadata and useful HTML/download links, but omit API and hypermedia routing URLs even when those fields were requested in a projection. Legacy and unknown protocol versions retain the original text byte-for-byte; modern text-only JSON responses serialize the same compact DTO as `structuredContent`. Non-text resource blocks and tool errors retain their existing content behavior. Structured projections use the same sanitized and filtered source as the legacy formatter.
+
 The issue metadata (`list_issue_types`, `list_issue_fields`), comment (`add_issue_comment`, `update_issue_comment`), dependency (`issue_dependency_read`, `issue_dependency_write`), and duplicate-detection (`find_duplicate`) tools provide typed `outputSchema` and `structuredContent` for protocol `2026-07-28` and newer. Older or unknown protocol versions retain the same text responses without these fields. Tool errors do not return structured content. Dependency and duplicate-detection tools retain their existing feature gates.
 
 <!-- START AUTOMATED TOOLS -->

@@ -57,6 +57,29 @@ This function:
 return ghErrors.NewGitHubGraphQLErrorResponse(ctx, message, err), nil
 ```
 
+### Typed Tool Results
+
+Tools registered with concrete `NewTool[In, Out]` types expose output schemas and
+`structuredContent` only when the negotiated protocol is `2026-07-28` or newer.
+Older or unknown protocols retain the original text responses without these
+typed-output additions. Ordinary API and validation errors never expose the
+SDK-generated zero-value structured output.
+
+Handler-provided structured statuses are distinct from generated error output.
+For example, `issue_write` can return `IsError: true` with
+`status: "awaiting_user_submission"` while an MCP App form is pending. Modern
+clients retain that explicit status and its reason; legacy clients retain the
+stop message and error flag without structured content. This status does not
+mean the issue was created or updated. The output schema includes a strict
+status variant alongside the mutation's `id`/`url` variant. Multi-round-trip
+`InputRequests` continue to pass through unchanged.
+
+The consolidated issue tools use method-discriminated object outputs for modern
+successes. Issue and comment data are projected from the API responses into
+compact DTOs, excluding API, node, and hypermedia URLs while retaining human
+links. Legacy text is marshalled separately and keeps its original format and
+fields.
+
 ### Context Management
 
 The error handling system uses context to store errors for later inspection:

@@ -7,6 +7,18 @@
     "title": "Add Reaction to Issue or Pull Request Comment"
   },
   "description": "Add a reaction to an issue or pull request comment.",
+  "icons": [
+    {
+      "mimeType": "image/png",
+      "src": "data:image/png;base64,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",
+      "theme": "light"
+    },
+    {
+      "mimeType": "image/png",
+      "src": "data:image/png;base64,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",
+      "theme": "dark"
+    }
+  ],
   "inputSchema": {
     "properties": {
       "comment_id": {
@@ -30,11 +42,13 @@
       },
       "owner": {
         "description": "Repository owner (username or organization)",
-        "type": "string"
+        "type": "string",
+        "x-mcp-header": "owner"
       },
       "repo": {
         "description": "Repository name",
-        "type": "string"
+        "type": "string",
+        "x-mcp-header": "repo"
       }
     },
     "required": [
@@ -45,5 +59,24 @@
     ],
     "type": "object"
   },
-  "name": "add_issue_comment_reaction"
+  "name": "add_issue_comment_reaction",
+  "outputSchema": {
+    "additionalProperties": false,
+    "properties": {
+      "id": {
+        "type": "string"
+      },
+      "url": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "id",
+      "url"
+    ],
+    "type": [
+      "null",
+      "object"
+    ]
+  }
 }
@@ -7,6 +7,18 @@
     "title": "Add Reaction to Issue or Pull Request"
   },
   "description": "Add a reaction to an issue or pull request.",
+  "icons": [
+    {
+      "mimeType": "image/png",
+      "src": "data:image/png;base64,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",
+      "theme": "light"
+    },
+    {
+      "mimeType": "image/png",
+      "src": "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYCAYAAADgdz34AAAABmJLR0QA/wD/AP+gvaeTAAABxElEQVRIibWVvW4TURCFv0vlNEDcIHAkKAERJOIKSjoUArwBPwUFFaKIIngAJARCPIgdh4cgRBYt6ZIAEYEqdhpEw0fhCbkKa68dxyNtsfNzzpnZu3NhwpYGBdUqcA+4A1wEZiK0DawD74FWSml3JAJ1CngGLAIngU1gFfgZKWeAG8AFoAu8At6mlH6VtqTOqJ/UP2pDnRuQO6c27VlbrQ0Dvq121Fulag7q5qPmW18SdSqUd9Qrw4Jn9bNR21YrRQkvYixDKy/AuB3jWjocqKpdtXFU8AxrOTqZzp2PgvnaMRDUA+tB7mypG+OCZ3hbahPgRPguAR9LihaicEu9WcKxClzOi/fU1wPAk7rjgX0uEfNG3cs7mJjtE+wA5/olpZQEHgNf6K2NJyW4NeD7v7c4WptjSc0svlMjdzyM2fbdOyOA7x/T+7mzGj9H8xgIWuquevpw4HmsivkxwBdC/WJRsBKLqqPOHgH8aqybtcJlF0m1WLndUToJ5V31q9r3NOYk7Wh1Wa0PyK3HzA3l/4H3uzIrwFNgCThF7/x/AH5EylngOnAe6AAvgXcppd9DEWRE08DdeIou/RVgJaXUGYQzUfsL+zmwV7BtIq0AAAAASUVORK5CYII=",
+      "theme": "dark"
+    }
+  ],
   "inputSchema": {
     "properties": {
       "content": {
@@ -30,11 +42,13 @@
       },
       "owner": {
         "description": "Repository owner (username or organization)",
-        "type": "string"
+        "type": "string",
+        "x-mcp-header": "owner"
       },
       "repo": {
         "description": "Repository name",
-        "type": "string"
+        "type": "string",
+        "x-mcp-header": "repo"
       }
     },
     "required": [
@@ -45,5 +59,24 @@
     ],
     "type": "object"
   },
-  "name": "add_issue_reaction"
+  "name": "add_issue_reaction",
+  "outputSchema": {
+    "additionalProperties": false,
+    "properties": {
+      "id": {
+        "type": "string"
+      },
+      "url": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "id",
+      "url"
+    ],
+    "type": [
+      "null",
+      "object"
+    ]
+  }
 }