feat: v0.1.10 — per-session ephemeral keypairs

Each WS connection generates its own ed25519 keypair (sessionPubkey)
sent in the hello handshake. The broker stores it on the presence
row and uses it for message routing + list_peers. This gives every
`claudemesh launch` a unique crypto identity without burning invite
uses — member auth stays permanent, session identity is ephemeral.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/cli/src/commands/join.ts

@@ -14,7 +14,10 @@ import { parseInviteLink } from "../invite/parse";
 import { enrollWithBroker } from "../invite/enroll";
 import { generateKeypair } from "../crypto/keypair";
 import { loadConfig, saveConfig, getConfigPath } from "../state/config";
-import { hostname } from "node:os";
+import { writeFileSync, mkdirSync } from "node:fs";
+import { join, dirname } from "node:path";
+import { homedir, hostname } from "node:os";
+import { env } from "../env";
 
 export async function runJoin(args: string[]): Promise<void> {
   const link = args[0];
@@ -78,6 +81,16 @@ export async function runJoin(args: string[]): Promise<void> {
   });
   saveConfig(config);
 
+  // 4b. Store invite token for per-session re-enrollment (launch --name).
+  const configDir = env.CLAUDEMESH_CONFIG_DIR ?? join(homedir(), ".claudemesh");
+  const inviteFile = join(configDir, `invite-${payload.mesh_slug}.txt`);
+  try {
+    mkdirSync(dirname(inviteFile), { recursive: true });
+    writeFileSync(inviteFile, link, "utf-8");
+  } catch {
+    // Non-fatal — launch will fall back to shared identity.
+  }
+
   // 5. Report.
   console.log("");
   console.log(