Full disclosure: I am the founder building KeyRing AI, a local-first desktop app for working across multiple AI providers. This is not open source right now, so I understand if that makes the post less useful to some people. I am sharing the architecture/lessons learned rather than asking anyone to sign up. The core architecture decision was to avoid becoming a prompt relay. The desktop app stores provider credentials locally, runs the orchestration layer on the user’s machine, and sends requests directly from the user’s machine to provider APIs. The website is not in the AI request path. It handles commercial/distribution flows like account, license validation, downloads, and updates. That split creates a few technical constraints: Provider adapters need a common internal result shape without flattening away provider-specific capabilities. Tool definitions have to be translated per provider instead of hand-built inline. Streaming and non-streaming responses need compatible normalization so the UI can treat them consistently. Local history has to be useful without sending conversation state to a central backend. Licensing has to be enforceable without forcing prompts through a licensing server. The licensing part was one of the more interesting lessons. A normal SaaS can enforce access on every server request. A local-first app cannot rely on that pattern. The approach I settled on is server-side license validation followed by a short-lived Ed25519-signed entitlement envelope. The desktop verifies signature, issuer, audience, machine binding, and expiry locally before protected provider workflows run. Limitations so far: BYOK setup is still more friction than a normal web login. Provider APIs do not expose capabilities uniformly, so capability mapping is ongoing work. Local-first does not mean local-only inference; many requests still go to cloud AI providers. Cross-provider comparison is useful, but it can get expensive if the user blindly enables everything. Docs/context: https://keyringlabs.com/docs https://keyringlabs.com/architecture For people who have built AI clients or provider abstraction layers: what failure modes would you watch most closely in a no-relay, multi-provider desktop architecture? submitted by /u/RedditCommenter38
Originally posted by u/RedditCommenter38 on r/ArtificialInteligence