How to Configure Replit Agent: Skills and Custom Instructions for AI Development

## Replit Agent Can Now Be Customized: What Has Changed? On June 20, 2026, Replit announced the launch of a long-awaited feature—the ability to customize the built-in AI agent using **Skills** and **Custom Instructions**. Now developers can not only rely on the neural network's default behavior but also adapt it to their projects, coding style, and tech stack. This is a significant step forward for the Vibe Coding platform, where AI helps write, debug, and deploy applications. Details of the news are in the official Replit blog: [Source](https://blog.replit.com). ## What Are Custom Instructions and Skills? **Custom Instructions** are text prompts that you set once, and the agent remembers them for the entire work session. For example, you can specify: - "Always use TypeScript with strict mode" - "Write comments in Russian" - "Do not use third-party libraries without my permission" **Skills** are more complex knowledge blocks that can be attached to the agent. They contain code examples, algorithms, links to documentation, and even API keys. Each Skill is essentially a mini-module that expands the AI's knowledge base. ## Why Is This Important for Vibe Coding? Before this feature, the Replit AI agent was universal but not always precise in details. It might suggest a Python solution when you needed Go, or ignore corporate coding standards. Now: - **Project personalization.** You load Skills for a specific framework—React, Django, Flask—and the agent immediately uses best practices. - **Fewer edits.** The agent makes fewer syntax and architecture mistakes because it knows your preferences. - **Faster onboarding.** Newcomers can connect Skills with ready-made templates and avoid spending time learning all the platform's nuances. ## How to Use Custom Instructions in Practice Here are a few scenarios useful for every developer: 1. **Language control.** If you write code in a mix of Python and JavaScript, specify: "For the backend, use Python 3.11; for the frontend, use JavaScript ES2022." The agent won't mix them up. 2. **Security.** Prohibit the agent from using outdated libraries: "Do not use libraries with a version below 2.0 unless explicitly stated." 3. **Code style.** Set a rule: "Always add JSDoc comments to functions." The agent will generate documented code automatically. ## How to Configure Skills for Your Project Skills can be created from ready-made blocks or written from scratch. Suppose you work with **Next.js** and want the agent to always suggest server components. Create a Skill with the description: ```yaml name: Next.js Best Practices description: Use server components by default rules: - prefer server components over client components - use app directory structure - avoid 'use client' unless necessary ``` After connecting this Skill, the agent will automatically follow these rules when generating code. ## Example: Customization for Working with Databases Imagine you are building an application with **Supabase** and **Prisma**. Instead of reminding the agent about the database schema every time, you load a Skill with model descriptions and relationships. The agent will generate migrations and queries that match your data structure. **What does this give you?** - Fewer errors in SQL queries. - Code consistency within the team. - Rapid prototyping without manually entering repetitive settings. ## Practical Tips for Maximum Efficiency - **Combine Instructions and Skills.** Use Custom Instructions for general rules (language, style) and Skills for specialized knowledge (libraries, APIs). - **Test on small projects.** Before implementing customization in a large production environment, check how the agent responds to new instructions in an isolated setting. - **Update Skills regularly.** Technologies change—if you switch to a new framework version, update the corresponding Skill. ## Conclusion The ability to customize

How to Configure Replit Agent: Skills and Custom Instructions for AI Development

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