Real-time messaging for the AI era - engineering posts, product updates, and architecture deep-dives.https://cloudsignal.io/https://cloudsignal.io/blog/acl-v2-self-binding-identity/https://cloudsignal.io/blog/acl-v2-self-binding-identity/How ACL v2's identity-bound topic patterns kill per-user rule explosion, what we found about wildcard SUBACK along the way, and what v2.2 added on top.Wed, 06 May 2026 00:00:00 GMTACLSecurityhttps://cloudsignal.io/blog/cloudsignal-cli-pkce-acls-claims/https://cloudsignal.io/blog/cloudsignal-cli-pkce-acls-claims/Why we chose a CLI over an SDK, how browser-based login works, and how policy and identity claims now flow from your terminal.Wed, 15 Apr 2026 00:00:00 GMTDeveloper ExperienceCLIAuthhttps://cloudsignal.io/blog/ai-chat-drop-in-for-no-code-builders/https://cloudsignal.io/blog/ai-chat-drop-in-for-no-code-builders/How we built a drop-in for the Vercel AI SDK that gives AI chat offline recovery and multi-device sync, in one config change.Thu, 12 Mar 2026 00:00:00 GMTAI ChatVercel AI SDKMQTTNo-Codehttps://cloudsignal.io/blog/ai-chat-presence-and-typing/https://cloudsignal.io/blog/ai-chat-presence-and-typing/The little signals that make AI chat feel responsive: who is here, what the model is doing, and how to render that without races.Wed, 25 Feb 2026 00:00:00 GMTAI ChatPresenceUXhttps://cloudsignal.io/blog/mqtt-security-defaults-we-chose/https://cloudsignal.io/blog/mqtt-security-defaults-we-chose/TLS-only listeners, deny-by-default ACLs, and per-org mountpoints. What we picked and why.Thu, 12 Feb 2026 00:00:00 GMTSecurityTLShttps://cloudsignal.io/blog/realtime-collaboration-primitives/https://cloudsignal.io/blog/realtime-collaboration-primitives/Presence, ordered message delivery, and per-document access control. Everything else is product polish.Tue, 03 Feb 2026 00:00:00 GMTCollaborationReal-timehttps://cloudsignal.io/blog/web-push-without-firebase/https://cloudsignal.io/blog/web-push-without-firebase/We added VAPID-based web push so apps can reach users when the tab is closed, without taking a dependency on FCM.Wed, 21 Jan 2026 00:00:00 GMTPush NotificationsWeb Pushhttps://cloudsignal.io/blog/auth-without-jwt-headaches/https://cloudsignal.io/blog/auth-without-jwt-headaches/How short-lived MQTT credentials remove the rotation, revocation, and refresh problems baked into long-lived JWTs.Wed, 14 Jan 2026 00:00:00 GMTAuthSecurityhttps://cloudsignal.io/blog/building-multi-agent-system-with-cloudsignal/https://cloudsignal.io/blog/building-multi-agent-system-with-cloudsignal/Learn how to connect AI agents using MQTT pub/sub messaging. We'll build a three-agent pipeline that handles research, summarization, and notifications.Wed, 07 Jan 2026 00:00:00 GMTTutorialPythonAI Agentshttps://cloudsignal.io/blog/why-multi-agent-ai-systems-keep-failing/https://cloudsignal.io/blog/why-multi-agent-ai-systems-keep-failing/43% of product teams report inter-agent communication as their biggest latency bottleneck. Here's why multi-agent systems fail, and the architectural pattern that solves it.Tue, 30 Dec 2025 00:00:00 GMTAI AgentsArchitectureMQTThttps://cloudsignal.io/blog/notifications-the-broker-handles/https://cloudsignal.io/blog/notifications-the-broker-handles/How we replaced polling and SSE plumbing with a topic-per-user pattern that scales without code.Mon, 15 Dec 2025 00:00:00 GMTNotificationsReal-timehttps://cloudsignal.io/blog/rest-api-for-mqtt-publishers/https://cloudsignal.io/blog/rest-api-for-mqtt-publishers/Why we ship a REST publish endpoint alongside MQTT, and when each one is the right tool.Tue, 02 Dec 2025 00:00:00 GMTREST APIDeveloper Experiencehttps://cloudsignal.io/blog/building-presence-that-actually-works/https://cloudsignal.io/blog/building-presence-that-actually-works/Why naive presence drifts within minutes, and how MQTT's last-will primitive fixes it for free.Tue, 18 Nov 2025 00:00:00 GMTPresenceReal-timehttps://cloudsignal.io/blog/pubsub-without-the-yak-shaving/https://cloudsignal.io/blog/pubsub-without-the-yak-shaving/What it took to make MQTT pub/sub feel like a managed primitive, not a broker you babysit.Tue, 04 Nov 2025 00:00:00 GMTMQTTPub/SubInfrastructure