chore: import upstream snapshot with attribution

tests/unit/claude-web-executor-split.test.ts

@@ -0,0 +1,38 @@
+import { test } from "node:test";
+import assert from "node:assert/strict";
+import { readFileSync } from "node:fs";
+import { fileURLToPath } from "node:url";
+import { dirname, join } from "node:path";
+
+// Split-guard for the claude-web executor payload extraction.
+// The pure payload types + transforms + default tools/style live in the leaf
+// claude-web/payload.ts (no host state, no fetch/auth). Host imports back the
+// symbols it uses (ClaudeWebRequestPayload, transformToClaude, transformFromClaude).
+const HERE = dirname(fileURLToPath(import.meta.url));
+const EXE = join(HERE, "../../open-sse/executors");
+const HOST = join(EXE, "claude-web.ts");
+const LEAF = join(EXE, "claude-web/payload.ts");
+
+test("leaf hosts the payload builders/transforms and does not import the host", () => {
+  const src = readFileSync(LEAF, "utf8");
+  for (const sym of ["transformToClaude", "transformFromClaude", "getDefaultTools"]) {
+    assert.match(src, new RegExp(`export function ${sym}\\b`));
+  }
+  assert.match(src, /export interface ClaudeWebRequestPayload\b/);
+  assert.doesNotMatch(src, /from "\.\.\/claude-web\.ts"/);
+});
+
+test("host imports the transforms back from the leaf", () => {
+  const host = readFileSync(HOST, "utf8");
+  assert.match(host, /from "\.\/claude-web\/payload\.ts"/);
+});
+
+test("transformToClaude builds a Claude-web payload with model + tools", async () => {
+  const { transformToClaude } = await import("../../open-sse/executors/claude-web/payload.ts");
+  const payload = transformToClaude(
+    { messages: [{ role: "user", content: "hi" }] },
+    "claude-sonnet-4-6"
+  );
+  assert.equal(typeof payload, "object");
+  assert.ok(Array.isArray(payload.tools));
+});