TYPO3 Extensions or Vibe Coding: Which Is better in 2026?

AI-assisted development tools can generate PHP classes, TCA configurations, Fluid templates and even complete TYPO3 extensions within minutes. This raises a new question for many TYPO3 projects in 2026:

Should you use an existing TYPO3 extension or develop the required functionality yourself with the help of vibe coding?

The simple answer is this: for standard functionality, an established extension is usually the better choice. For individual business processes, a custom extension may make more sense. Vibe coding should not be seen as a replacement for professional development, but as a tool that can accelerate it.

Why this decision is especially important in 2026

Since 21 April 2026, TYPO3 v14 LTS has been the current long-term support release. It receives bug fixes until 31 December 2027 and security updates until 30 June 2029. Regular support for TYPO3 v12, on the other hand, ended on 30 April 2026.

For new TYPO3 projects, this means extensions should not only work today. They must also remain compatible with TYPO3 v14, current PHP versions and future Core updates.

TYPO3 v14 also requires a valid composer.json file for every extension, including installations that are not managed entirely through Composer. TYPO3 generally recommends Composer for managing dependencies and extensions.

The decisive question is therefore not only:

How quickly can I implement this functionality?

It is also:

Who will maintain, test and update this functionality over the next three to five years?

Three ways to add new functionality to TYPO3

In practice, there are three common approaches.

1. Use an existing TYPO3 extension

An existing extension from the TYPO3 Extension Repository, Packagist or a commercial provider solves a requirement that is already well understood.

This often makes sense for functionality such as:

• News and blog posts
• Forms
• Redirects
• SEO metadata
• Sitemaps
• Cookie and consent solutions
• Search functionality
• Location or address directories
• Standardised integrations

The biggest advantage is not merely faster installation. An established extension has usually already been used in several projects, documented and adapted to different configurations.

Nevertheless, an extension should not be installed based on its download count alone. Its current maintenance status, TYPO3 v14 compatibility, documentation, dependencies and update history are what matter.

2. Develop a custom TYPO3 extension

A custom extension makes sense when the functionality is directly connected to an individual business process.

Typical examples include:

• Synchronisation with an internal CRM or ERP
• Custom approval and editorial workflows
• Product or customer data with a dedicated data model
• Automated document generation
• Industry-specific calculations
• Custom import and export processes
• Portals with roles, permissions and customer-specific areas
• Integrations with existing enterprise systems

In these cases, adapting a large standard extension often creates more complexity than developing a small, focused solution.

A good custom extension contains only the functionality that is actually required. This can make it clearer, more performant and easier to integrate into the existing system architecture.

The disadvantage is that the organisation assumes responsibility for maintenance, testing, documentation and future TYPO3 upgrades.

3. Generate the extension with vibe coding

With vibe coding, the required functionality is described in natural language and an AI tool generates large parts of the code.

A prompt might look like this:

Create a TYPO3 v14 extension that manages event records, provides a backend module and renders the entries through a Fluid template.

The AI can then generate components including:

• The extension structure
• composer.json
• PHP namespaces
• Models and repositories
• TCA configuration
• Database definitions
• Controllers
• Fluid templates
• Event listeners
• Unit tests
• Documentation

At first, this may sound like an alternative to conventional extension development. In reality, vibe coding is not an architectural decision in itself.

It is simply a method of generating code.

Whether that code is secure, maintainable and compliant with TYPO3 best practices still needs to be verified.

Vibe coding is an accelerator, not a maintenance strategy

Vibe coding is excellent for prototypes, recurring structures and clearly scoped tasks. It becomes problematic when generated code is moved directly into production without anyone understanding its architecture and impact.

A 2026 study shows that developers with different levels of experience generally recognise the limitations of vibe coding. However, the ability to review generated code, find defects and assess its quality reliably depends heavily on existing development experience.

Another recent study of vibe coding and test-driven development concludes that fully automated approaches can introduce additional implementation decisions that were not explicitly requested. This can create areas of the system that are not covered by tests.

This problem is particularly relevant in TYPO3. An extension can appear to work while still creating long-term risks:

• Outdated TYPO3 APIs
• Incorrectly configured permissions
• Unnecessary database queries
• Unsafe input handling
• Incorrect caching configuration
• Missing language and workspace support
• Undocumented dependencies
• Problems during the next TYPO3 upgrade

The browser may display the expected result. That does not mean the extension is ready for production.

When an existing TYPO3 extension is the better choice

An existing extension is normally the right decision when the requirement occurs in many other TYPO3 projects.

A newsletter form, news output or redirect management is not a competitive advantage. Developing these features from scratch primarily creates additional maintenance work.

Before installing an extension, at least the following points should be reviewed:

Does the extension support TYPO3 v14?

An extension that supports only TYPO3 v11 or v12 should not be used in a new v14 project without a technical review.

Is it still actively maintained?

The date of the latest release is not always decisive on its own. Nevertheless, unresolved security issues, unanswered issues and missing compatibility updates should be treated as warning signs.

How many dependencies does it introduce?

An extension may require additional extensions or PHP packages. Every additional dependency increases the technical surface area of the project.

Is the documentation sufficient?

A well-documented extension is easier to configure, update and hand over to other developers.

Can it be removed cleanly?

A good solution should not permanently tie large parts of the website architecture to a single extension.

When a custom TYPO3 extension makes more sense

A custom extension is particularly useful when at least one of the following applies:

1. The process is specific to the organisation.
2. The website needs to communicate with internal systems.
3. A standard extension would require extensive overrides.
4. Only a small part of a large extension is needed.
5. Performance or scalability is especially important.
6. The data model and permissions are project-specific.
7. The functionality provides a genuine business advantage.

A custom CRM integration is a good example.

A general integration extension may be able to transfer data. As soon as custom rules are required for customer groups, status changes, duplicates, error handling and approvals, a focused custom extension is usually easier to understand.

Decision matrix for TYPO3 projects

Requirement	Recommended approach
Standardised functionality	Existing extension or TYPO3 Core
One-off internal prototype	AI-assisted development
Custom business process	Custom TYPO3 extension
Security-critical functionality	Reviewed extension or professionally developed custom solution
CRM, ERP or API integration	Custom extension with a clear integration architecture
Small backend utility	AI-assisted custom extension
Functionality with no long-term internal maintenance owner	Established and actively maintained extension
Strongly differentiating product functionality	Custom extension

The most practical approach in 2026: hybrid instead of either-or

In 2026, the best solution often combines all of these approaches.

Step 1: Check the TYPO3 Core

Many features that previously required an additional extension are now available in the TYPO3 Core. Among other improvements, TYPO3 v14 includes dedicated modules for short URLs and QR codes as well as enhancements to the Form Framework.

Every dependency you can avoid reduces future maintenance work.

Step 2: Review existing extensions

If the functionality is not available in the Core, look for an actively maintained extension.

Do not review only whether the required feature exists. It is equally important to assess how well the extension fits the existing architecture.

Step 3: Define requirements and acceptance criteria

Before AI generates any code, the requirements must be unambiguous.

This includes questions such as:

• Which users may use the functionality?
• What data will be stored?
• How will errors be handled?
• Does the functionality need to be multilingual?
• Are workspaces required?
• What happens if an import is interrupted?
• Which data may be deleted?
• Which tests must pass?

The more precise the requirements are, the more effectively generated code can be reviewed.

Step 4: Use AI for clearly scoped tasks

AI can accelerate development particularly well for recurring tasks:

• The basic extension structure
• Basic TCA configuration
• Data objects and repositories
• Test cases
• PHPDoc and documentation
• Refactoring
• Upgrade preparation
• Simple migrations

Architecture, data modelling, security and final code quality should still remain the responsibility of an experienced TYPO3 developer.

Step 5: Review the code systematically

An AI-generated extension should go through the same quality process as manually written code.

At a minimum, this should include:

• Code review
• TYPO3 Coding Standards
• PHPStan or comparable static analysis
• Unit and integration tests
• Permission checks
• Security review
• Tests with realistic data
• Architecture documentation
• An upgrade and maintenance strategy

Only after these checks should the extension be deployed to production.

Is a custom extension built with vibe coding cheaper?

Initially, it often is. Over the long term, not necessarily.

AI primarily reduces the time required to write recurring code. It does not eliminate the cost of:

• Requirements analysis
• Architecture
• Testing
• Bug fixing
• Deployment
• Documentation
• Security updates
• TYPO3 upgrades
• PHP upgrades
• Changes to external APIs

An extension generated in two hours can later require many days of debugging and upgrade work.

Conversely, a small, well-planned custom extension may be cheaper over time than a large standard extension that needs to be adapted after every update.

The decisive factor is therefore not only the initial development cost, but the total cost of ownership over several years.

My recommendation for TYPO3 projects in 2026

For standard functionality, check the TYPO3 Core first and then review the existing extension ecosystem.

A custom extension makes sense when the requirement is individual, business-critical or closely connected to other systems.

Vibe coding should be used selectively to accelerate professional development. It should never result in unreviewed code being deployed to production TYPO3 systems.

The most practical order is therefore:

Check the Core → review extensions → plan custom development → use AI selectively → test and document the code.

This allows organisations to benefit from the speed of modern AI tools without compromising the stability, security and long-term upgradeability of their TYPO3 system.

Frequently asked questions

Can an entire TYPO3 extension be created with AI?

Technically, yes. The result may be sufficient for prototypes or small internal functions. On production websites, however, the generated code should be reviewed, tested and documented by an experienced TYPO3 developer.

Are extensions from the TYPO3 Extension Repository automatically secure?

No. The repository is an important source of TYPO3 extensions, but it does not automatically guarantee that every extension is actively maintained, secure or compatible with the current TYPO3 version. Version support, maintenance status, documentation and dependencies need to be reviewed individually.

When is a custom TYPO3 extension worthwhile?

A custom extension is particularly worthwhile for individual business processes, specialised data models, CRM or ERP integrations and functionality that provides direct business value.

Is vibe coding suitable for TYPO3 beginners?

Vibe coding lowers the barrier to entry and can produce working prototypes. Without TYPO3 and PHP knowledge, however, it is difficult to identify architectural problems, security risks and outdated APIs reliably.

What changed for extensions in TYPO3 v14?

Among other changes, TYPO3 v14 requires every extension to provide a valid composer.json file. This makes dependencies, compatibility and package information even more important.

Conclusion

The question in 2026 is not whether TYPO3 extensions or vibe coding are fundamentally better.

The right question is:

Which solution creates the lowest long-term effort for this specific functionality while providing sufficient security, maintainability and flexibility?

Existing extensions are ideal for established standard requirements. Custom extensions are suited to individual and business-critical processes. Vibe coding can accelerate both approaches, provided the generated code is reviewed professionally.

When this decision is based on more than initial development speed, the result is a TYPO3 system that remains reliable after future Core, PHP and security updates.