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

# AI

AI Nodes extend the toolset provided by the Basic Nodes to a more in-depth level, enabling interactions with system resources.

[Watch this Episode](https://support.cognigy.com/hc/en-us/articles/360019857220-Cognigy-Sessions-Cognigy-NLU) of Cognigy Sessions for a technical deep dive.

<CardGroup cols={3}>
  <Card title="Add Lexicon Keyphrase" href="/ai/agents/develop/node-reference/ai/add-lexicon-keyphrase">
    The Add Lexicon Keyphrase Node dynamically creates a [Lexicons](/ai/platform-features/nlu/slots/user-defined/lexicon) Keyphrase entry, either based on hardcoded or dynamic data.
  </Card>

  <Card title="AI Agent" href="/ai/agents/develop/node-reference/ai/ai-agent">
    The AI Agent Node lets you assign a job to an AI Agent, provide them instructions, tools, and access to knowledge.
  </Card>

  <Card title="AI Agent Handover" href="/ai/agents/develop/node-reference/ai/ai-agent-handover">
    The AI Agent Handover Node transfers the conversation to another AI Agent Node or Flow.
  </Card>

  <Card title="Clean Text" href="/ai/agents/develop/node-reference/ai/clean-text">
    The Clean Text Node enables a user to clean a provided text using the Text Cleaner class.
  </Card>

  <Card title="Copy Slots to Context" href="/ai/agents/develop/node-reference/ai/copy-slots-to-context">
    The Copy Slots to Context Node copies Slots that were detected and written to the [Input](/ai/agents/develop/ai-agent-memory/input) or [Context](/ai/agents/develop/ai-agent-memory/context) object.
  </Card>

  <Card title="Disable Slot Fillers" href="/ai/agents/develop/node-reference/ai/disable-slot-fillers">
    The Disable Slot Fillers Node disables any active [Slot Fillers](/ai/platform-features/nlu/overview).
  </Card>

  <Card title="Enable Slot Fillers" href="/ai/agents/develop/node-reference/ai/enable-slot-fillers">
    The Enable Slot Fillers Node enables a particular [Slot Filler](/ai/platform-features/nlu/overview).
  </Card>

  <Card title="Execute Cognigy NLU" href="/ai/agents/develop/node-reference/ai/execute-cognigy-nlu">
    The Execute Cognigy NLU Node explicitly executes [Cognigy NLU](/ai/platform-features/nlu/overview).
  </Card>

  <Card title="Fuzzy Search" href="/ai/agents/develop/node-reference/ai/fuzzy-search">
    The Fuzzy Search Node enables a Flow to search fuzzy string patterns in list of source data and returns the best possible matches.
  </Card>

  <Card title="Load AI Agent" href="/ai/agents/develop/node-reference/ai/load-ai-agent">
    The Load AI Agent Node lets you load the AI Agent's configuration and persona data into the Input or Context object.
  </Card>

  <Card title="Match Pattern" href="/ai/agents/develop/node-reference/ai/match-pattern">
    The Match Pattern Node enables a user to find patterns in text and expose them in the [Input Object](/ai/agents/develop/ai-agent-memory/input).
  </Card>

  <Card title="Regex Slot Filler" href="/ai/agents/develop/node-reference/ai/regex-slot-filler">
    The Regex Slot Filler Node creates a Slot based on a regex pattern. When the pattern is detected, a Slot is written to the [Input](/ai/agents/develop/ai-agent-memory/input) object.
  </Card>

  <Card title="Resolve Tool Action" href="/ai/agents/develop/node-reference/ai/resolve-tool-action">
    The Resolve Tool Action Node sends an answer as the response to a tool call to the AI Agent after completing a [tool action](/ai/agents/develop/node-reference/ai/ai-agent#tool).
  </Card>
</CardGroup>