docs: add September 14 updates and fix region sync

content/guides/changelog.mdx

@@ -3,6 +3,24 @@ title: What's New
 description: Track CALL-E Developer API and SDK product updates.
 ---
 
+## September 14, 2026
+
+**Updated concurrent call limits:** The shared number pool supports 1 simultaneous
+call, purchased numbers support 10 simultaneous calls, and SIP integrations have
+no CALL-E-imposed concurrent call limit. These limits refer to calls active at the
+same time, not call initiation rate (calls per second, or CPS).
+
+**Updated billing model:** Calls are now billed in 10-second increments, with total
+cost consisting of a Call fee and a Success fee. The Call fee covers actual carrier
+charges and model resource usage, including a small preparation and pre-connection
+model cost even when a call is not connected.
+
+The Success fee applies only when the task's defined business success criteria are
+met. A connected call, an answered call, or a completed conversation alone does not
+qualify as success. For example, a reservation task succeeds only when the requested
+booking is confirmed—not simply when someone answers or discusses availability.
+Call fees may still apply when those success criteria are not met.
+
 ## September 10, 2026
 
 **Windows-compatible agent commands:** Updated agent integrations now run correctly

src/regions.mjs

@@ -18,7 +18,7 @@ export function extractRegions(readme) {
     !rows ||
     rows.length < 3 ||
     rows[0] !==
-      "| Country | Country Code | Calling Code | Languages | Line Region |" ||
+      "| Country | Country Code | Calling Code | Languages | Default Line |" ||
     !/^\|(?:[ \t]*:?-+:?[ \t]*\|){5}$/.test(rows[1]) ||
     rows.some((row) => row.split("|").length !== 7) ||
     rows.slice(2).some((row) =>

tests/docs-site.spec.ts

@@ -51,7 +51,7 @@ test("serves prerendered guides on clean URLs", async ({ page, request }) => {
 
 const regionSection = `Use these country codes with recipient settings.
 
-| Country | Country Code | Calling Code | Languages | Line Region |
+| Country | Country Code | Calling Code | Languages | Default Line |
 | --- | --- | --- | --- | --- |
 | Updated test destination | ZZ | +999 | Test language | International |
 
@@ -95,6 +95,7 @@ test("refreshes region coverage without rebuilding the docs", async ({ page }) =
     body: regionsReadme,
   }));
   await page.goto("/regions");
+  await expect(page.getByRole("columnheader", { name: "Default Line" })).toBeVisible();
   await expect(page.getByRole("cell", { name: "Updated test destination" })).toBeVisible();
   await expect(page.getByRole("cell", { name: "Test language" })).toBeVisible();
   await expect(page.getByText("Unrelated examples.")).toHaveCount(0);
@@ -112,7 +113,7 @@ test("refreshes region coverage without rebuilding the docs", async ({ page }) =
 
 test("retains a readable region snapshot when refresh fails", async ({ page, request }) => {
   await page.setViewportSize({ width: 390, height: 844 });
-  const tableHeader = "| Country | Country Code | Calling Code | Languages | Line Region |";
+  const tableHeader = "| Country | Country Code | Calling Code | Languages | Default Line |";
   const html = await request.get("/regions");
   expect(await html.text()).toContain("<table");
   const markdown = await request.get("/regions.md");