Show HTML pages in a task view beside the transcript

api/openapi.yaml

@@ -798,6 +798,27 @@ paths:
         "404": { $ref: "#/components/responses/Error" }
         "409": { $ref: "#/components/responses/Error" }
 
+  /api/tasks/{taskId}/raw:
+    parameters:
+      - { name: taskId, in: path, required: true, schema: { type: string } }
+    get:
+      operationId: getTaskRaw
+      description: >
+        A regular file in the task's worktree, whole, with a content type chosen by its extension: an HTML page in the
+        app's Page view and the stylesheets, scripts and images it loads. The response carries a sandbox
+        Content-Security-Policy, so a page opened from this address directly can't act on the API as its viewer.
+        A path that leaves the worktree, through .. or a symlink, is refused.
+      parameters:
+        - { name: path, in: query, required: true, schema: { type: string }, description: "Slash-separated, relative to the worktree root." }
+      responses:
+        "200":
+          description: The file's bytes.
+          content:
+            "*/*": { schema: { type: string, format: binary } }
+        "400": { $ref: "#/components/responses/Error" }
+        "404": { $ref: "#/components/responses/Error" }
+        "409": { $ref: "#/components/responses/Error" }
+
   /api/terminals:
     get:
       operationId: listTerminals