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

# Overview

# What Is Standard Agent Builder?

Standard Agents are portable agents that adhere to the (not yet released) Standard Agent Specification. The Standard Agent Builder (we'll call it AgentBuilder) is a first-party tool for building, deploying, and managing Standard Agents.

Standard Agents are designed to be finely tuned to specific tasks, workflows, or business use cases. Rather than assuming a single model is the best fit for every task, Standard Agents empower you — the engineer — to determine what tradeoffs are best for your use case. Once built, Standard Agents can be composed into larger Agents that have multiple capabilities, or even deployed as MCP tools for use in third party applications.

AgentBuilder is a vite plugin that provides a complete development, deployment, and management experience for Standard Agents. It includes a built-in admin UI for testing and monitoring agents, a CLI for scaffolding and managing projects, and a SDK for building and extending agents. Each AgentBuilder instance produces a standard API for each Standard Agent it deploys, so you can easily integrate them into your own applications.

## Key Features

<AccordionGroup>
  <Accordion title="Persistent Conversation Threads">
    Every agent thread is backed by a Cloudflare Durable Object with its own isolated SQLite database. This means:

    * Message history is automatically persisted
    * Execution logs and tool calls are tracked on a per-thread basis
    * Conversation state is maintained across requests
    * Each thread is fully isolated
  </Accordion>

  <Accordion title="Composable Subagents">
    `dual_ai` agents can run as autonomous child threads spawned from a parent orchestrator.

    * Parent and child communicate through durable queued messages
    * Child results/failures are returned with attachment-safe path copying
    * Resumable subagents support lifecycle tools (`subagent_create`, `subagent_message`)
    * Child instances can be named and tracked in parent registry state
  </Accordion>

  <Accordion title="Built-in Admin UI">
    Standard Agents includes a complete admin interface for:

    * Configuring agents, models, and providers
    * Testing agents in real-time
    * Monitoring conversation threads
    * Viewing execution logs and debugging
  </Accordion>

  <Accordion title="File-Based Auto-Discovery">
    All agents, prompts, models, and tools are defined as type-safe TypeScript files.

    * All files in the `agents/` directory are automatically discovered and loaded
    * Agents, prompts, models, tools, and hooks are all committed to source control.
    * Admin UI reads and writes directly to these TypeScript files.
    * Type-safe with TypeScript autocomplete for the defined tools, prompts, models, and agents.
  </Accordion>
</AccordionGroup>

<Note>
  Standard Agent Builder is proprietary software owned by FormKit Inc. For licensing inquiries, contact [enterprise@formkit.com](mailto:enterprise@formkit.com). However, the Standard Agent Specification is open source and free to use.
</Note>

## Next Steps

<CardGroup cols={2}>
  <Card title="Installation" icon="download" href="/introduction/installation">
    Get Standard Agents up and running in minutes
  </Card>

  <Card title="Architecture" icon="sitemap" href="/introduction/architecture">
    Understand how Standard Agents work
  </Card>

  <Card title="API Reference" icon="code" href="/api-reference/introduction">
    Explore the complete API
  </Card>
</CardGroup>