perf(mcp): deduplicate operation schemas with shared definitions

Share operation definitions between individual requests and batch steps, reducing the execute request schema by 39%. Place definitions at the tool input schema root so local references resolve correctly.

Update the schema digest and smoke assertions. Verified with 45 MCP tests, the live stdio smoke test, and 228 schema validation comparisons.

docs/automation/mcp_smoke.py

@@ -53,8 +53,20 @@ def legacy(server: Path) -> None:
     assert names == TOOLS, names
     execute_request = definitions["ocs_execute"]["inputSchema"]["properties"]["request"]
     variants = execute_request.get("anyOf") or execute_request.get("oneOf")
-    assert len(variants) == 39
+    # Resolve local references from the complete tool input schema.
+    root = definitions["ocs_execute"]["inputSchema"]
+    def resolve(variant):
+        if "$ref" not in variant:
+            return variant
+        ref = variant["$ref"]
+        assert ref.startswith("#/")
+        resolved = root
+        for part in ref[2:].split("/"):
+            resolved = resolved[part.replace("~1", "/").replace("~0", "~")]
+        return resolved
+    variants = [resolve(variant) for variant in variants]
     op_enum = execute_request["properties"]["op"]["enum"]
+    assert len(variants) == len(op_enum)
     for shipped in ("entities_create", "entities_delete", "entities_transform",
                     "block_define", "block_delete", "file_identity", "xdata_set",
                     "view_focus", "wblock", "plot",
@@ -139,9 +151,12 @@ def modern(server: Path) -> None:
             "_meta": meta,
         },
     })
-    error = missing_cmd["result"]["structuredContent"]
-    assert error["code"] == "invalid_arguments"
-    assert "LINE 0,0 10,10" in error["error"]
+    # Tool errors are text content; the output schema covers successes only.
+    assert missing_cmd["result"]["isError"] is True
+    assert "structuredContent" not in missing_cmd["result"]
+    error = missing_cmd["result"]["content"][0]["text"]
+    assert "Missing cmd" in error
+    assert "LINE 0,0 10,10" in error
 
     invalid_mutation = request(process, {
         "jsonrpc": "2.0",
@@ -154,7 +169,8 @@ def modern(server: Path) -> None:
         },
     })
     assert invalid_mutation["result"]["isError"] is True
-    assert "request_id" in invalid_mutation["result"]["structuredContent"]["error"]
+    assert "structuredContent" not in invalid_mutation["result"]
+    assert "request_id" in invalid_mutation["result"]["content"][0]["text"]
 
     rejected = request(process, {
         "jsonrpc": "2.0",