refactor: minimize cleanup and cover special schema keys

Author: nperez0111

packages/core/src/blocks/ListItem/NumberedListItem/IndexingPlugin.ts

@@ -75,7 +75,7 @@ function calculateListItemIndex(
   let isFirst: boolean;
 
   // Determine starting index from the block just before the chain
-  const lastInChain = chain.at(-1) ?? { node, pos };
+  const lastInChain = chain[chain.length - 1];
   const lastInfo = getBlockInfoFromNode(lastInChain.node, lastInChain.pos);
   if (!lastInfo.hasContent) {
     throw new Error("impossible");

packages/xl-ai/src/streamTool/jsonSchema.test.ts

@@ -23,6 +23,8 @@ describe("createStreamToolsArraySchema definitions", () => {
       properties: {
         value: { type: "string", enum: ["one", "two"] },
         constructor: { type: "string" } satisfies JSONSchema7Definition,
+        valueOf: { type: "number" } satisfies JSONSchema7Definition,
+        toString: { type: "boolean" } satisfies JSONSchema7Definition,
         enabled: true,
         forbidden: false,
       },
@@ -33,6 +35,8 @@ describe("createStreamToolsArraySchema definitions", () => {
       properties: {
         forbidden: false,
         constructor: { type: "string" } satisfies JSONSchema7Definition,
+        toString: { type: "boolean" } satisfies JSONSchema7Definition,
+        valueOf: { type: "number" } satisfies JSONSchema7Definition,
         enabled: true,
         value: { enum: ["one", "two"], type: "string" },
       },