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

# Overview

# What is Standard Agents Builder?

Standard Agents are portable agents that adhere to the [Standard Agent Specification](https://standardagentspec.com). The specification is released at version 0.2.0. Standard Agents Builder (this documentation also calls it Standard Agents Builder) 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.

Standard Agents Builder 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 Standard Agents Builder instance produces a standard API for each Standard Agent it deploys, so you can easily integrate them into your own applications.

## Key Features

> [accordion] 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] 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] Built-in Admin UI
>
> Standard Agents includes a complete admin interface for:
>
> * Testing agents in real time
> * Monitoring conversation threads
> * Viewing execution logs and debugging

> [accordion] 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.
> * You change an agent by editing its TypeScript file.
> * Type-safe with TypeScript autocomplete for the defined tools, prompts, models, and agents.

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

## Next Steps

> [card] [Installation](https://docs.standardagents.ai/introduction/installation.md)
>
> Get Standard Agents up and running in minutes

> [card] [Architecture](https://docs.standardagents.ai/introduction/architecture.md)
>
> Understand how Standard Agents work

> [card] [API reference](https://docs.standardagents.ai/api-reference/rest/create-thread.md)
>
> Read the thread and message API


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