NexAgentLens

IDE for AI Agents

A VS Code extension that visualizes AI agent workflows defined in YAML and enhances prompt markdown files with token awareness and validation.

Workflow Visualization

Workflow Errors Visualization

Prompt Viewer

Prompt Errors Viewer

Features

• YAML Workflow Visualization — Open any *.agent.yaml file to see a graph of workflow steps rendered with React Flow
• Prompt Markdown Enhancement — Open any *.prompt.md file to see role detection, token estimation, and validation
• Validation Engine — Detects duplicate IDs, missing references, cycles, guardrail violations, and more

Usage

1. Install the extension
2. Open a .agent.yaml or .prompt.md file
3. The AgentLens panel opens automatically in a side panel

YAML Spec (v1)

agent:
  name: my-agent
  steps:
    - id: step1
      type: llm
      max_tokens: 1000
      next: step2
    - id: step2
      type: tool

Prompt Spec

## System
You are a helpful assistant.

## User
Tell me a joke.

## Tools
- search