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

# Models, Rules, Prompts, and MCP servers

> Explore the different types of reusable blocks in Gobi Hub including models, MCP servers, rules, and prompts

## Models

Models are blocks that let you specify Large Language Models (LLMs) and other deep learning models to be used for various roles in the open-source IDE extension like Chat, Autocomplete, Edit, Embed, Rerank, etc. You can explore available models on [the hub](https://hub.gourmand.dev/?type=models).

Gobi supports [many model providers](/customize/model-providers), including Anthropic, OpenAI, Gemini, Ollama, Amazon Bedrock, Azure, xAI, DeepSeek, and more. Models can have one or more of the following roles depending on its capabilities, including `chat`, `edit`, `apply`, `autocomplete`, `embed`, and `rerank`.

Read more about roles [here](/customize/model-roles) and view [`models`](/reference#models) in the YAML Reference for more details.

## MCP Servers

Model Context Protocol (MCP) is a standard way of building and sharing tools for language models. MCP Servers can be defined in `mcpServers` blocks.

[Explore MCP Servers](https://hub.gourmand.dev/?type=mcpServers) on the Hub, learn more in the [MCP deep dive](/customize/deep-dives/mcp), and view [`mcpServers`](/reference#mcpservers) in the YAML Reference for more details.

## Rules

Rules blocks are instructions that your custom AI code agent will always keep in mind - the contents of rules are inserted into the system message for all Chat, Plan, and Agent requests.

[Explore rules](https://hub.gourmand.dev/?type=rules) on the Hub, learn more in the [rules deep dive](/customize/deep-dives/rules), and view [`rules`](/reference#rules) in the YAML Reference for more details.

## Prompts

Prompts blocks are pre-written, reusable instructions that are used to kick off a task. They are especially useful as context for repetitive and/or complex tasks.

[Explore prompts](https://hub.gourmand.dev/?type=prompts) on the Hub, learn more in the [prompts deep dive](/customize/deep-dives/prompts), and view [`prompts`](/reference#prompts) in the YAML Reference for more details.