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Subagent

Llm Expert

Use this agent for AI SDK integration, LLM provider configuration, prompt template management, error handling for AI APIs, and optimizing LLM workflow patterns within Output. Specializes in Anthropic Claude and OpenAI integrations.

Type
Subagent
Repository
growthxai/output
GitHub stars
439
License
Apache-2.0
Repo last updated
Sep 25, 2026

What Llm Expert is

Llm Expert is a subagent published in the growthxai/output repository on GitHub, which has about 439 stars. The repository describes itself as: “The open-source TypeScript framework for building AI workflows and agents. Designed for Claude Code describe what you want, Claude builds it, with all the best practices already in place.”

A subagent is a specialist assistant that Claude can hand part of a task to. It is a markdown file whose frontmatter sets a name, a description that tells Claude when to delegate, and optionally the tools and model it may use; the body becomes the subagent's own system prompt.

Because a subagent works in its own context, it keeps the main conversation focused: Claude can send a narrow job, such as a review or a specialised analysis, to Llm Expert and get back a compact result.

How to install Llm Expert

Claude Code

  1. Download llm-expert.md from the repository.
  2. Save it to ~/.claude/agents/ to use it in every project, or to .claude/agents/ inside one project to share it through version control.
  3. Claude Code watches these folders, so the subagent is usually available right away. Ask Claude to use it by name, or @-mention it to make sure it runs.

Claude Cowork

  1. Cowork loads subagents through plugins. If the repository is packaged as a plugin marketplace, add it under Customize → Plugins → Add marketplace and install the plugin that contains this subagent.
  2. Otherwise, bundle the file into your own plugin's agents/ folder and upload it from Customize → Plugins.

New to extending Cowork? Our plugins guide and Customize guide explain how skills, plugins, and connectors fit together.

Inside the source file

An excerpt from .claude/agents/llm-expert.md, shared under the repository's Apache-2.0 license. Read the full file on GitHub.

Role Definition

You are an expert in LLM integration within the Output context, with deep knowledge of:

  • AI SDK (Anthropic, OpenAI) provider configuration
  • LiquidJS prompt template management
  • LLM API error handling and retry strategies
  • Output.ai LLM workflow patterns

Core Competencies

  • AI SDK Integration: Provider setup, model selection, response handling
  • Prompt Management: .prompt file structure, LiquidJS templating, variable injection
  • Error Handling: API rate limits, timeout handling, fallback strategies
  • Workflow Integration: LLM calls as Temporal activities, streaming responses
  • Cost Optimization: Token management, model selection, prompt efficiency

Output Framework LLM Patterns

  • Prompt Templates: YAML frontmatter configuration, provider settings, temperature tuning
  • Module Integration: Using output-llm module within Output steps for isolated LLM operations
  • Response Processing: Handling structured/unstructured LLM outputs

Provider-Specific Expertise

  • Anthropic Claude: Model variants, system prompts, tool usage patterns
  • OpenAI: GPT model selection, function calling, embeddings integration
  • AI SDK: Unified provider interface, streaming, error standardization

Response Guidelines

  • Focus on output-llm module usage within Output step() patterns
  • All LLM calls are handled by the isolated output-llm module, not directly in steps
  • LLM operations run outside Temporal sandbox for flexibility
  • Emphasize error handling and retry strategies for production use
  • Provide examples using Output prompt workflow patterns
  • Consider cost implications of different model/prompt strategies

Common Integration Scenarios

  • Prompt Workflows: Multi-step LLM conversations, context passing
  • Content Generation: Long-form content creation, structured output
  • Data Processing: LLM-based data transformation and analysis
  • Interactive Workflows: Human-in-the-loop patterns with LLM assistance

Before you install

  • Read the whole file first. Skills, commands, and subagents are instructions Claude will follow, so make sure they match what you want.
  • Check which tools, scripts, or MCP servers it uses. Local servers and scripts run with your permissions.
  • Try it in a test project or a copy of your files before pointing it at real work.
  • Pin the version you tested, and review changes before updating.
  • Watch for instructions that fetch web content or run shell commands; those are where prompt injection risks start. See our prompt injection guide.

FAQ

What is Llm Expert?

Llm Expert is a subagent for Claude Code and Claude Cowork from the growthxai/output repository on GitHub. Use this agent for AI SDK integration, LLM provider configuration, prompt template management, error handling for AI APIs, and optimizing LLM workflow patterns within Output. Specializes in Anthropic Claude and OpenAI integrations.

How do I install Llm Expert in Claude Code?

Download llm-expert.md from the repository. Save it to ~/.claude/agents/ to use it in every project, or to .claude/agents/ inside one project to share it through version control. Claude Code watches these folders, so the subagent is usually available right away. Ask Claude to use it by name, or @-mention it to make sure it runs.

Can I use Llm Expert in Claude Cowork?

Cowork loads subagents through plugins. If the repository is packaged as a plugin marketplace, add it under Customize → Plugins → Add marketplace and install the plugin that contains this subagent. Otherwise, bundle the file into your own plugin's agents/ folder and upload it from Customize → Plugins.

Is Llm Expert safe to install?

It is a third-party community resource, not reviewed by Anthropic or this site. Read the source file first, check which tools and connectors it uses, and install only from sources you trust.

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Listing data comes from the public GitHub repository and was last checked in September 2026. Excerpts are © their authors and shared under Apache-2.0. This directory is independent and not affiliated with Anthropic or the resource's authors.