# Core Concepts

- [Workflow](/miiflow-docs/core-concepts/workflow.md)
- [Nodes in Workflow](/miiflow-docs/core-concepts/nodes.md)
- [Trigger Node](/miiflow-docs/core-concepts/trigger-node.md)
- [LLM Node](/miiflow-docs/core-concepts/llm-node.md)
- [Condition Node](/miiflow-docs/core-concepts/condition-node.md)
- [Knowledge Retrieval Node](/miiflow-docs/core-concepts/knowledge-retrieval-node.md)
- [Tool Call Node](/miiflow-docs/core-concepts/tool-call-node.md)
- [Code Node](/miiflow-docs/core-concepts/code-node.md)
- [Loop Node](/miiflow-docs/core-concepts/loop-node.md)
- [API Call Node](/miiflow-docs/core-concepts/api-call-node.md)
- [Image Generation Node](/miiflow-docs/core-concepts/image-generation-node.md)
- [Variables](/miiflow-docs/core-concepts/variables.md)
- [Knowledge Base](/miiflow-docs/core-concepts/knowledge-base.md)
- [API Keys](/miiflow-docs/core-concepts/api-keys.md)