Fix blog OpenAPI agent path parameters

agent.py

@@ -2,6 +2,7 @@ from __future__ import annotations
 
 import base64
 import json
+import re
 from typing import Any
 
 import httpx
@@ -30,6 +31,41 @@ OPERATIONS = json.loads("{\n  \"create_blog_post\": {\n    \"description\": \"Cr
 ROOT_SECURITY = json.loads("[]")
 SECURITY_SCHEMES = json.loads("{\n  \"apiKeyAuth\": {\n    \"description\": \"Use the configured `BLOG_API_KEY` value.\",\n    \"in\": \"header\",\n    \"name\": \"x-api-key\",\n    \"type\": \"apiKey\"\n  },\n  \"bearerAuth\": {\n    \"description\": \"Use `Authorization: Bearer $BLOG_API_KEY`.\",\n    \"scheme\": \"bearer\",\n    \"type\": \"http\"\n  }\n}")
 SECURITY_FIELDS = json.loads("{\n  \"apiKeyAuth\": {\n    \"field\": \"BLOG_API_KEY\",\n    \"kind\": \"apiKey\",\n    \"location\": \"header\",\n    \"name\": \"x-api-key\"\n  },\n  \"bearerAuth\": {\n    \"field\": \"BLOG_API_KEY\",\n    \"kind\": \"http\",\n    \"scheme\": \"bearer\"\n  }\n}")
+PATH_PARAMETER_RE = re.compile(r"{([^}/]+)}")
+
+
+def _ensure_path_parameters() -> None:
+    for operation in OPERATIONS.values():
+        path = str(operation.get("path") or "")
+        parameters = operation.get("parameters")
+        if not isinstance(parameters, list):
+            parameters = []
+            operation["parameters"] = parameters
+        seen = {
+            (param.get("name"), param.get("in"))
+            for param in parameters
+            if isinstance(param, dict)
+        }
+        insert_at = 0
+        for name in PATH_PARAMETER_RE.findall(path):
+            key = (name, "path")
+            if key in seen:
+                continue
+            parameters.insert(
+                insert_at,
+                {
+                    "name": name,
+                    "in": "path",
+                    "required": True,
+                    "description": f"Path parameter `{name}`.",
+                    "schema": {"type": "string"},
+                },
+            )
+            insert_at += 1
+            seen.add(key)
+
+
+_ensure_path_parameters()
 
 
 class OperationInput(BaseModel):
@@ -349,6 +385,10 @@ class BlogOpenapiAgent(A2AAgent):
                 headers[name] = str(value)
             elif location == "cookie":
                 cookies[name] = value
+        unresolved = PATH_PARAMETER_RE.findall(path)
+        if unresolved:
+            missing = ", ".join(sorted(set(unresolved)))
+            raise ValueError("missing required path parameter(s): " + missing)
         if cookies:
             headers["cookie"] = "; ".join(f"{key}={value}" for key, value in cookies.items())
         auth_headers, auth_query = self._auth_for_operation(ctx, operation)