Blog/AI Agents/Vibe Coding: What It Is, When It Makes Sense, and When It Kills Your Project

Vibe Coding: What It Is, When It Makes Sense, and When It Kills Your Project

Vibe coding is a new way of working with AI: you write prompts, the model generates code. We explain how it differs from agentic coding, when it makes sense, and when it destroys a project. Plus a comparison of Claude Code, Cursor, and Copilot.

Antoni Seba·14 maja 2026·11 min read

TL;DR

  • Vibe coding is a style of working with an LLM where you write code almost entirely through prompts to the model, treating the editor as a console. The name comes from a February 2025 tweet by Karpathy.
  • It makes sense for prototypes, experiments, internal tools, and MVPs. It stops making sense when a project enters production with real customers and requires tests, CI/CD, and code audits.
  • At Soft Synergy we use Claude Code and Cursor daily, but every production commit goes through review and tests. This is not "vibe coding to master."
  • Best tools in 2026: Claude Code (CLI and IDE), Cursor, GitHub Copilot Pro, Aider, Cline. Each has a different target and philosophy.
  • Anti-Figma: in the era of agentic coding, building a full Figma mockup before writing code is often a week wasted. A better plan is a lo-fi sketch plus an MVP in code.

What Is Vibe Coding, Really?

Vibe coding is a way of working where the developer expresses intent in natural language and the language model (LLM) generates, modifies, and often executes code. The programmer stops writing line by line and starts steering the outcome, accepting or correcting the agent's proposals.

The term doesn't describe a new technology. It describes a change in working habit. The editor starts functioning as a window into dialogue with the model, not a place where a human types every character. Some people in the industry call this "directing programming." Others use the term ironically, because the quality of the resulting code depends heavily on the model and the clarity of the prompt.

In practice, vibe coding looks like this: you open Cursor, write "add client-side and server-side email validation to the form, use Zod," the agent generates changes across three files, you accept or correct them. You repeat. After an hour you have a feature that would have taken a full day to type manually.

Where Did the Term Come From?

The word was coined by Andrej Karpathy, co-founder of OpenAI and former AI Director at Tesla, in February 2025 on X. He wrote, roughly, that there's a new kind of programming where you "fully give in to the vibes and forget that code even exists." The phrase caught on because it captured the new state of mind developers have when working with AI agents.

After Karpathy's post, industry media and tool builders started using the term. Cursor, Claude Code, and Aider entered a phase of rapid growth because they provided multi-file editing, version control, and project memory — not just autocomplete.

Vibe Coding vs Agentic Coding — What's the Difference?

Vibe coding is a style of work; agentic coding is infrastructure. The terms are often used interchangeably, but they're not the same. Vibe coding describes how a human writes code; agentic coding describes how a tool autonomously executes multi-step tasks without constant supervision.

Anthropic, in their research on agents, defines an agent as a system where the LLM "dynamically directs its own processes and tool use, maintaining control over how it accomplishes tasks." A workflow is different: the model and tools are embedded in a rigid, predefined chain of steps.

In practice, a typical vibe coder uses agentic coding tools (Claude Code, Cursor, Aider), but not every agentic coding session is vibe coding. You can run an agent in autonomous mode with a detailed to-do list and step away for 30 minutes. That's not vibe coding — that's supervised delegation. Vibe coding assumes short, dense interaction loops where the model's response time is measured in seconds.

When Does Vibe Coding Work, and When Does It Kill a Project?

Vibe coding works when speed of iteration matters more than guaranteed quality of every line. It works when rolling back a change is easy. It works when there are no customers yet who could be hurt by a regression.

Concrete scenarios where vibe coding gives you an edge:

  • Client prototype in the discovery phase, when you're deciding whether the project makes sense.
  • Internal tool to automate a single operation, used by 1 to 3 people.
  • Experimental script for data analysis, scraping, or testing an API.
  • MVP for the first 5 to 10 paying customers, when you're learning daily what the market wants.
  • UI feature in an existing project where existing tests guard against regressions.

In my experience at Soft Synergy, I've seen dozens of client projects built in "vibe coding to master" mode that had to be scrapped and rewritten from scratch. The classic pattern: someone built a 12-screen SaaS in 3 weeks with Cursor, everything worked in the demo. After connecting the first client it turned out there was no multi-user authentication, sessions leaked, the database had no indexes, and the admin panel had SQL injection. The refactor was more expensive than a rewrite.

Vibe coding stops making sense when:

  • The project goes into production with real data and customers.
  • Compliance is required (GDPR, HL7, PCI DSS).
  • The team has more than one person and the code must be readable for the next developer.
  • The client pays for long-term support and needs guarantees.
  • The cost of a mistake is high (payments, medical data, personal data).

Best Vibe Coding Tools in 2026

The best tools in 2026 are Claude Code, Cursor, GitHub Copilot Pro, Aider, and Cline. Each has a different target and philosophy, so the choice depends on the team's working style, not the vendor's marketing.

Claude Code from Anthropic is a CLI with extensions for VS Code and JetBrains. Strongest for long editing sessions across many files with full project context. Excellent for refactors and writing tests. Available in Pro plans from $20/month and Max from $100/month.

Cursor is a VS Code fork with a deeply integrated agent. Best for people who don't want to leave their familiar editor. Pricing is $20/month for Individual, $40/month for Team. Great repo memory and external documentation integration.

GitHub Copilot from Microsoft and GitHub. Most popular, most "enterprise," deeply integrated with VS Code and JetBrains. Pro from $10/month, Pro+ for $39/month. Weaker at multi-file refactors, stronger at autocomplete.

Aider is an open-source CLI, works through git diffs and is preferred by developers who want control over every commit. Works with any model via API. Free — you only pay for tokens.

Cline (formerly Claude Dev) is a VS Code extension, similar to Cursor but lighter and cheaper if you use your own API key.

Anti-Figma: A Real MVP Starts in Code, Not in a Mockup

The classic software house workflow before AI looked like this: a week of discussions, two weeks in Figma, two weeks of coding, a week of QA, deploy. Six weeks to the first user-facing version. Six weeks where the client doesn't know if anyone will actually buy it.

In 2026 that plan simply doesn't add up. The cost of iteration in code has dropped several times over because the agent generates 70% of the boilerplate. The cost of iteration in Figma stays the same (a human clicks, exports, presents). This creates the strange situation where the mockup becomes the bottleneck — not the code.

The new model: half an hour of a lo-fi sketch, an hour of discussion about priorities, MVP in code in 3 to 5 days, the client clicks on a real product within a week. Product decisions move faster because you can test them on a live object, not a slide.

Figma doesn't disappear. For custom design-driven projects (apps with strong branding, stores with custom UX, enterprise projects), full mockups still make sense. But for the 80% of SMB clients who think they need "Figma design," what they actually need is a fast prototype in code they can see live.

Vibe Coding at Soft Synergy — How Not to Kill the Project

At Soft Synergy we use vibe coding daily, but with a few hard rules. The first MVP is built fast with Claude Code or Cursor, sometimes in 3 to 5 days. Step two is writing tests (also via agent, but reviewed by a human). Step three is setting up CI/CD with a pipeline that blocks merges to master without passing tests.

This is not "vibe coding everything." This is an agentic workflow with a human in the loop at critical points. Specifically:

  • Experiment phase: full vibe coding, accept 90% of agent proposals.
  • MVP phase: vibe coding plus agent-generated tests, reviewed by human.
  • Production phase: code review always, payment integrations written by a human from start to finish, regression tests in the pipeline.
  • Maintenance phase: vibe coding comes back because every change is small and has tests.

What's Next for Vibe Coding in Production?

Vibe coding in production makes sense if the team has prepared the infrastructure for it. Without tests, CI, code review, and alerts it's an airport without a control tower.

Three concrete things worth implementing if you're planning vibe coding seriously in 2026:

  1. CI with unit and e2e tests in every repo. Without this, the agent breaks things you won't notice.
  2. Code review still applies, even if the code was written by an agent. A human reads the diff and approves the merge.
  3. Skills and custom workflows for the agent: teach it project conventions, banned patterns, preferred libraries. A few hours of investment that pays off in every subsequent project.

For teams that want to start with vibe coding tomorrow: install Claude Code or Cursor, connect it to an existing repo, add a project conventions file (e.g., CLAUDE.md), do the first small feature through the agent with a full review. After 5 iterations you'll see whether it scales for your team.

Vibe coding doesn't replace software engineering. It only changes the proportion of time spent writing code versus thinking about what exactly you want to build.

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