> ## Documentation Index
> Fetch the complete documentation index at: https://docs.medera.info/llms.txt
> Use this file to discover all available pages before exploring further.

# Core Concepts

> The building blocks of the Agentic Framework

| 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.                                                                  |