release: 0.1.3 — add a2amcp bin, sync server/cli version from package.json

Adds an "a2amcp" bin (alongside the existing "a2a-mcp" for back-compat)
so that npx -y a2amcp resolves the binary by package name. Without it
npx fell back unreliably when no bin matched.

Also rips the hardcoded "0.1.0" out of cli.ts and gateway.ts and reads
the version from package.json — that was why serverInfo lagged behind
the published tag. Renames the user-facing command in help / error
strings / README from a2a-mcp to a2amcp; the legacy bin stays for
existing scripts.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/gateway.ts

@@ -6,6 +6,7 @@
  * Naming: ``{agent}__{skill}``. Double underscore separator. Skill names
  * containing ``__`` are not supported.
  */
+import { createRequire } from "node:module";
 import { Server } from "@modelcontextprotocol/sdk/server/index.js";
 import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
 import {
@@ -17,6 +18,9 @@ import { loadConfig, type EnabledAgent } from "./config.js";
 import { loadCredentials } from "./credentials.js";
 import { UpstreamAgent, UpstreamError, type UpstreamTool } from "./upstream.js";
 
+const require = createRequire(import.meta.url);
+const pkg = require("../package.json") as { version: string };
+
 export const SEP = "__";
 
 export interface GatewayOptions {
@@ -48,7 +52,7 @@ export async function buildGateway(opts: GatewayOptions = {}): Promise<GatewayHa
   const server =
     opts.server ??
     new Server(
-      { name: "a2a-mcp", version: "0.1.0" },
+      { name: "a2amcp", version: pkg.version },
       { capabilities: { tools: { listChanged: false } } },
     );
 
@@ -70,9 +74,9 @@ export async function buildGateway(opts: GatewayOptions = {}): Promise<GatewayHa
         } catch (err) {
           // Silently skip an upstream that's down — surfacing an error here
           // would break the client's whole tool list. The user can debug via
-          // `a2a-mcp doctor`.
+          // `a2amcp doctor`.
           process.stderr.write(
-            `a2a-mcp: skipping ${u.name}: ${(err as Error).message}\n`,
+            `a2amcp: skipping ${u.name}: ${(err as Error).message}\n`,
           );
         }
       }),