build: Add opencode tools for testing

.opencode/tools/ask262-get-section-content.ts

@@ -0,0 +1,37 @@
+/**
+ * OpenCode custom tool: ask262_get_section_content
+ * Retrieves full content from a specific ECMAScript spec section.
+ */
+
+import { tool } from "@opencode-ai/plugin";
+import * as lancedbSdk from "@lancedb/lancedb";
+import { createGetSectionContentTool } from "../../src/agent-tools";
+
+export default tool({
+  description:
+    "Retrieves all text chunks from a specific ECMAScript specification section by section ID. " +
+    "Supports recursive fetching - if a section has children, it will fetch all descendants. " +
+    "Use this to get complete spec text when you know the section ID (e.g., 'sec-if-statement').",
+  args: {
+    sectionId: tool.schema
+      .string()
+      .describe(
+        "The section ID (e.g., 'sec-if-statement', 'sec-array-prototype-map') to fetch content for",
+      ),
+  },
+  async execute(args, context) {
+    const { sectionId } = args;
+    const { worktree } = context;
+
+    // Connect to LanceDB
+    const storageDir = `${worktree}/storage`;
+    const db = await lancedbSdk.connect(storageDir);
+    const table = await db.openTable("spec_vectors");
+
+    // Create and execute tool
+    const contentTool = createGetSectionContentTool(table);
+    const result = await contentTool.func({ sectionId });
+
+    return result;
+  },
+});