release: 0.1.4 — forward cp_jwt + bucket via params._meta

On login the gateway now captures user.id from /v1/auth/login, derives
the user's MinIO bucket (user-<id>-files), and persists both in
~/.a2a/credentials.json. UpstreamAgent.callTool injects
``params._meta = { cp_jwt, cp_url, bucket }`` on every tools/call so
upstream agents see the same caller context the platform orchestrator
provides. Unauthenticated clients omit _meta — back-compat preserved.

Requires a2a-pack with the matching _meta handler in
``a2a_pack/mcp/server.py`` (companion change in apps/a2a).

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

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "a2amcp",
-  "version": "0.1.3",
+  "version": "0.1.4",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "a2amcp",
-      "version": "0.1.3",
+      "version": "0.1.4",
       "license": "Apache-2.0",
       "dependencies": {
         "@modelcontextprotocol/sdk": "^1.0.4",

package.json

@@ -1,6 +1,6 @@
 {
   "name": "a2amcp",
-  "version": "0.1.3",
+  "version": "0.1.4",
   "description": "MCP gateway for a2acloud agents. Run as a local MCP server; expose any number of deployed A2A agents to Claude Code, Cursor, and other MCP clients.",
   "type": "module",
   "bin": {

src/api.ts

@@ -52,23 +52,21 @@ export class ControlPlaneClient {
   }
 
   login(email: string, password: string) {
-    return this.request<{ access_token: string; user: { email: string } }>(
+    return this.request<{
-      "POST",
+      access_token: string;
-      "/v1/auth/login",
+      user: { id: number; email: string };
-      { email, password },
+    }>("POST", "/v1/auth/login", { email, password });
-    );
   }
 
   signup(email: string, password: string) {
-    return this.request<{ access_token: string; user: { email: string } }>(
+    return this.request<{
-      "POST",
+      access_token: string;
-      "/v1/auth/signup",
+      user: { id: number; email: string };
-      { email, password },
+    }>("POST", "/v1/auth/signup", { email, password });
-    );
   }
 
   me() {
-    return this.request<{ email: string }>("GET", "/v1/me");
+    return this.request<{ id: number; email: string }>("GET", "/v1/me");
   }
 
   listAgents() {

src/cli.ts

@@ -92,7 +92,14 @@ program
     const api = resolveApiUrl(opts.api);
     try {
       const out = await new ControlPlaneClient(api, null).login(email, password);
-      await saveCredentials({ apiUrl: api, token: out.access_token, email: out.user.email });
+      const bucket = `user-${out.user.id}-files`;
+      await saveCredentials({
+        apiUrl: api,
+        token: out.access_token,
+        email: out.user.email,
+        userId: out.user.id,
+        bucket,
+      });
       output.write(`logged in as ${out.user.email} @ ${api}\n`);
     } catch (err) {
       fail(err instanceof ApiError ? err.message : (err as Error).message);

src/credentials.ts

@@ -14,6 +14,8 @@ export interface Credentials {
   apiUrl: string;
   token: string;
   email: string;
+  userId?: number;
+  bucket?: string;
 }
 
 const credsDir = () => path.join(os.homedir(), ".a2a");
@@ -28,6 +30,8 @@ export async function loadCredentials(): Promise<Credentials | null> {
       apiUrl: data.api_url ?? DEFAULT_API_URL,
       token: data.token,
       email: data.email ?? "",
+      userId: typeof data.user_id === "number" ? data.user_id : undefined,
+      bucket: typeof data.bucket === "string" ? data.bucket : undefined,
     };
   } catch (err: any) {
     if (err?.code === "ENOENT") return null;
@@ -37,11 +41,14 @@ export async function loadCredentials(): Promise<Credentials | null> {
 
 export async function saveCredentials(c: Credentials): Promise<void> {
   await fs.mkdir(credsDir(), { recursive: true });
-  await fs.writeFile(
+  const out: Record<string, unknown> = {
-    credsFile(),
+    api_url: c.apiUrl,
-    JSON.stringify({ api_url: c.apiUrl, token: c.token, email: c.email }),
+    token: c.token,
-    { mode: 0o600 },
+    email: c.email,
-  );
+  };
+  if (c.userId !== undefined) out.user_id = c.userId;
+  if (c.bucket !== undefined) out.bucket = c.bucket;
+  await fs.writeFile(credsFile(), JSON.stringify(out), { mode: 0o600 });
 }
 
 export async function clearCredentials(): Promise<boolean> {

src/gateway.ts

@@ -39,14 +39,25 @@ export interface GatewayHandle {
 
 export async function buildGateway(opts: GatewayOptions = {}): Promise<GatewayHandle> {
   const cfg = opts.agents ?? (await loadConfig()).agents;
-  const token =
+  const creds = opts.token !== undefined ? null : await loadCredentials();
-    opts.token !== undefined
+  const token = opts.token !== undefined ? opts.token : creds?.token ?? null;
-      ? opts.token
+  // Forward CP credentials + bucket as params._meta so upstream agents
-      : (await loadCredentials())?.token ?? null;
+  // can act on behalf of the caller (mirrors the platform-orchestrator
+  // call shape). When the user isn't logged in, _meta is omitted and
+  // upstream sees the same unauthenticated context as before.
+  const cpJwt = creds?.token ?? null;
+  const cpUrl = creds?.apiUrl ?? null;
+  const bucket = creds?.bucket ?? null;
 
   const upstreams = new Map<string, UpstreamAgent>();
   for (const a of cfg) {
-    upstreams.set(a.name, new UpstreamAgent({ name: a.name, url: a.url, token }));
+    upstreams.set(
+      a.name,
+      new UpstreamAgent({
+        name: a.name, url: a.url, token,
+        cpJwt, cpUrl, bucket,
+      }),
+    );
   }
 
   const server =

src/upstream.ts

@@ -12,6 +12,18 @@ export interface UpstreamConfig {
   name: string;
   url: string;
   token: string | null;
+  /** Forwarded to the upstream as ``params._meta.cp_jwt`` on tools/call.
+   *  Lets the upstream agent act on the caller's behalf (file/agent CRUD
+   *  on /v1/me/*) — same path the platform orchestrator uses. */
+  cpJwt?: string | null;
+  /** Paired with ``cpJwt``. The upstream agent uses this as the base URL
+   *  when calling back into /v1/me/*. */
+  cpUrl?: string | null;
+  /** User's MinIO bucket (``user-<id>-files``). Forwarded as
+   *  ``params._meta.bucket`` so agents that touch the workspace
+   *  (agent-builder, file tools) get a context whose
+   *  ``ctx.workspace.bucket`` resolves to the right bucket. */
+  bucket?: string | null;
 }
 
 export interface UpstreamTool {
@@ -88,9 +100,12 @@ export class UpstreamAgent {
     name: string,
     arguments_: Record<string, unknown>,
   ): Promise<UpstreamCallResult> {
-    return this.rpc<UpstreamCallResult>("tools/call", {
+    const meta: Record<string, unknown> = {};
-      name,
+    if (this.cfg.cpJwt) meta.cp_jwt = this.cfg.cpJwt;
-      arguments: arguments_,
+    if (this.cfg.cpUrl) meta.cp_url = this.cfg.cpUrl;
-    });
+    if (this.cfg.bucket) meta.bucket = this.cfg.bucket;
+    const params: Record<string, unknown> = { name, arguments: arguments_ };
+    if (Object.keys(meta).length > 0) params._meta = meta;
+    return this.rpc<UpstreamCallResult>("tools/call", params);
   }
 }