Architecture
Understanding the components that power CQL Studio
Drag to pan · hover or click a component or connection for details
Browser SPA: CQL IDE, in-browser ELM translation, FHIR loaders, terminology browser, export packaging, SQL-on-FHIR (PGlite), and AI chat surface.
Core Components
CQL Studio UI
Browser IDE with in-browser ELM translation, FHIR tooling, export packaging, and SQL-on-FHIR.
CQL Studio Server
API and BFF for OIDC sessions, teams/workspaces, MCP tools, proxies, and the OpenCode gateway.
SSO IdP (OIDC)
Required OpenID Connect identity provider for sign-in — any OIDC-compatible IdP.
Application Database
PostgreSQL for users, teams, workspaces, settings, and AI session archives.
FHIR Endpoints
Four roles — evaluation, data, terminology, content — often one server via shared base URL.
OpenCode & LLM
Optional AI runner behind the server gateway; models via Ollama, OpenAI, or compatible APIs.
Cross-Platform and Hardware Support
Deploy locally or in the cloud on x64 and arm64, online or fully offline.
Run on your machine or host on AWS, Azure, or Google Cloud with the same tooling.
Supports x64 and arm64, from laptops to data-center servers.
Accelerate AI workloads with Apple Silicon, NVIDIA, or AMD GPUs.
Works online or air-gapped behind corporate firewalls — no mandatory cloud.