---
title: "Memory, skills, subagents, and MCP"
description: "Extend a deep agent without coupling application infrastructure to the model loop."
---

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

# Memory, skills, subagents, and MCP

# Extension points

`DeepMemory` supplies persistent context; `DeepSkill` registers named instructions that the model loads only when relevant. `write_todos` helps the model expose a multi-step plan.

Register `DeepSubagent` specialists for isolated tasks. Each specialist receives a fresh agent and can be constrained to delegated workspace paths. Configure durable `DeepTaskStore`, `DeepTodoStore`, and `DeepRunStore` implementations whenever work outlives the process.

MCP applications supply tools and resource workspaces through `mcpSources(...)`; the agent can read resources with `read_mcp_resource`.

Source: https://docs.cortavyn.org/deep-agent/extension-points/index.mdx