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A 3D digital illustration representing a structured neural network used to build an Agentforce agent.
Agentforce & AI

Build Your First Agent: Agentforce Developer Guide

Build a service-focused agent and pick up the Agentforce basics on the way: Agent Builder, custom Topics, and running Actions through Flow.

The short answer

Agent Builder is Flow Builder for the agentic era. You build an agent by defining Topics, the agent's domains of expertise, and mapping Actions to each one, with Template-Triggered Flows doing the data retrieval and processing. Action descriptions are what the reasoning engine reads, so they carry the work.

Key takeaways Agents take action using CRM data; answering questions is only part of what they do. Let Flow do the heavy lifting of data retrieval and processing behind your agent's actions. Use the Agent Builder Canvas to test, delete and refine topics and instructions until the reasoning behaves the way you want. Fill in the descriptions for Actions. They are the "API documentation" the agent's decision-making engine reads.

Introduction to Agentforce agents

Agentforce moves past the static LLM chatbot. A chatbot gives you guidance; an Agentforce agent executes the task, working against your CRM data and business processes. If you have spent time in Flow Builder, Agent Builder is the equivalent for the agentic era.

Understanding the Agent Builder environment

Agent Builder is the main interface inside Agentforce Studio, and it is laid out like an IDE. The Explorer organizes your Settings, Topics, Variables and Connections. The Canvas and Script View show the agent's logic flow. Sitting alongside those is an AI Assistant, a second agent that answers questions while you build.

Building your first agent

Open the Agentforce Studio app and pick New Agent. Templates give you a foundation to start from, but build modularly and give each agent a specific role instead of one jack-of-all-trades bot.

1. Configure topics and actions

Topics are the agent's domains of expertise. Each one is grounded by specific instructions and mapped to Actions. To create a custom Topic, give it a clear name and a concise description, then map Actions to it. Custom Actions bridge the gap between the agent and your internal logic, and Template-Triggered Flows are the main mechanism for executing that logic.

2. Implementation logic

For a Service Agent, the Flow takes Case.Id as an input variable, looks up the related account cases, and outputs a structured response for the LLM to interpret.

3. Debugging and refinement

When something errors, go to the Script View. The agent's YAML-like structure makes the problem easy to spot. Paste the failing snippet into the AI Assistant in the sidebar and it will come back with a fix.

Best practices for agent design

Write explicit system instructions in the System tab so the agent's persona and objective are grounded. Define a custom Error Message for unexpected inputs and data gaps. And spend real time on Action descriptions, because how well the reasoning engine decides is directly proportional to how well you described the tool. Write clear, objective-driven descriptions for every action the agent can reach.

Originally reported by salesforceben.com

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