Core Concepts - Medera

Concept	Description
Workflow	A canvas graph with input variables, state variables, nodes, and connections. Persisted in `agent_workflows`.
Version	An immutable published snapshot in `agent_workflow_versions`. Identified by semver.
Execution	A single run of a workflow against an input. Persisted in `agent_workflow_executions` with `execution_trace[]`.
Deployment	A runtime instance of a published version in `agent_deployments`. Sandbox or production.
Node	A typed unit of work (start, condition, intake-agent, …). Backed by a `NodeRunner`.
NodeRunner	A subclass of with `execute(node, context)`.
Execution context	Per-execution state holder. Owns input / state / node outputs and `resolveVariable`.
Agent (orchestrator)	An entity in the care orchestrator with `agent type` and capabilities.
Workflow Module (intake)	A reusable conversation module the Intake Agent can run (e.g. `general_intake`, `prescription_refill`, `lab_flagged`).
Expert	A typed clinical capability (PHQ-9, C-SSRS, ICD-10, …) bundled by agents.
Event	A pub/sub message on the care orchestrator event bus.