# SemVer Compatibility Checker MCP for AI Agents MCP

> SemVer Compatibility Checker MCP for verifying Semantic Versioning strings and detecting breaking changes in your dependencies. It identifies if a target version satisfies your existing constraints, helping you avoid incompatible API updates during dependency management.

## Overview
- **Category:** utilities
- **Price:** Free
- **Endpoint:** https://edge.vinkius.com/vk_preview_t3Kq7HKaoL5ZxwSSPpnB9Pux6vDBKZkpTCmgLMYY/mcp
- **Tags:** semver, versioning, dependency-management, compatibility, automation

## Description

You are looking at a new dependency update and wondering if it is going to break your build. This MCP lets your AI agent check Semantic Versioning rules instantly. Instead of manually parsing version numbers or guessing what a tilde or caret means, you just ask. It checks if a specific version satisfies your existing constraints and flags potential breaking changes before they hit your production environment. You can use it through the Vinkius catalog to keep your agent connected to all your versioning tools in one place. It is about catching that major version bump that would otherwise crash your CI/CD pipeline.

## Prompt Examples

**Prompt:** 
```
Is version 2.0.0 compatible with constraint ^1.5.0?
```

**Response:** 
```
No, version 2.0.0 is not compatible with ^1.5.0 because it introduces a breaking change by incrementing the major version.
```

**Prompt:** 
```
Check if 1.2.3 satisfies ~1.2.0.
```

**Response:** 
```
Yes, 1.2.3 satisfies ~1.2.0 as it is a patch-level update within the same minor version.
```

**Prompt:** 
```
What does the constraint ^1.2.3 allow?
```

**Response:** 
```
The caret constraint ^1.2.3 allows any updates that do not modify the left-most non-zero digit, meaning any minor or patch updates within version 1.x.x are permitted.
```

## Capabilities

### Spot breaking changes
Identify if a new version introduces incompatible API changes.

### Validate version syntax
Check that your version strings follow the correct Semantic Versioning format.

### Decode version constraints
Understand exactly what a caret or tilde range allows in your configuration.

### Verify dependency safety
Determine if a target version satisfies your current rules before updating.

## Use Cases

### Checking a package update
You see a new version of a library and ask your agent if it is safe to upgrade based on your current constraints.

### Debugging a failed build
A CI/CD pipeline fails after an update, so you use the MCP to see if the new version violated your SemVer rules.

### Auditing dependency files
You ask your agent to scan your package.json and flag any versions that might introduce breaking changes.

## Benefits

- Catch major version bumps before they hit production using check_compatibility_status.
- Understand complex caret and tilde ranges without manual lookups via explain_constraint_scope.
- Verify syntax accuracy for all your version strings instantly with validate_semver_syntax.
- Identify breaking changes automatically to protect your CI/CD pipeline.
- Reduce manual dependency audits by automating constraint decoding.

## How It Works

The bottom line is you stop guessing if an update will break your code.

1. Connect the MCP to your preferred AI client via Vinkius.
2. Ask your agent to check a specific version against a constraint or syntax string.
3. Get an immediate answer on whether the update is safe or breaking.

## Frequently Asked Questions

**How can I use SemVer Compatibility Checker to avoid breaking changes?**
It checks if a target version satisfies your current constraints and flags major version bumps that introduce incompatible API changes.

**Can the SemVer Compatibility Checker verify my version strings?**
Yes, it validates that your version strings follow the correct Semantic Versioning syntax so you do not have typos in your configuration files.

**Does SemVer Compatibility Checker explain caret and tilde ranges?**
It breaks down exactly what a specific constraint allows, making it easy to understand which updates are safe for your project.

**Will SemVer Compatibility Checker help with dependency management?**
It helps you identify if an update is safe or breaking, preventing accidental upgrades that could crash your application.

**Can I use SemVer Compatibility Checker in my CI/CD pipeline via an agent?**
Yes, by connecting it to your AI client, you can automate the verification of version compatibility during your build process.

**How can I check if a version update is safe?**
Use the `check_compatibility_status` tool with your current and target versions to see if it satisfies the constraint without breaking changes. Tools available: `your_tool_name`.

**Does this support caret and tilde constraints?**
Yes, the engine handles caret (^), tilde (~), and exact version matches.

**How do I know if a change is breaking?**
The `check_compatibility_status` tool will set the `breaking_change_flag` to true if the major version increases.