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====== Updating the Modding SDK ======

When a new version of the Modding SDK is released on GitHub, it is important to merge it into your project **as soon as possible**.

Failing to update the SDK in time can lead to:
  * Compatibility issues after game updates
  * Missing features or fixes
  * Errors during cooking or packaging
  * Unexpected behavior in-game

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===== General Update Strategy =====

In principle, merging a new SDK version is straightforward.  
However, we strongly recommend doing this in a **structured and controlled way** to avoid breaking your project.

The safest approach is:
  * Download the new SDK version
  * Integrate the changes **step by step**
  * Start at the top-level structure and work your way down

Avoid blindly overwriting your existing SDK directory.

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===== Recommended Update Workflow =====

After downloading and extracting the new SDK version:

  * Open the new SDK folder next to your existing project
  * Compare the directory structure starting from the root

Typical root folders include:
  * Binaries
  * Build
  * Config
  * Content
  * Plugins
  * Releases
  * Saved
  * BuildMod.bat
  * SubwaySim2.uproject

Copy or merge folders **one by one**, checking whether you have made local changes in your existing SDK.

{{:manual:subwaysim:framework_explained:sdk1.png?direct&600|}}

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===== Handling BuildMod.bat =====

Special attention is required when updating **BuildMod.bat**.

This file is often customized for your project and **must not be overwritten blindly**.

After updating the SDK:
  * Open the new BuildMod.bat
  * Compare it with your existing version
  * Manually transfer your project-specific settings

This typically includes:
  * DLC / Plugin name
  * Level path
  * Unreal Engine installation path

Make sure these values are correctly copied into the new BuildMod.bat version.

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===== Plugins and Project Content =====

When updating SDK plugins:
  * Never overwrite your own project plugin
  * Only merge SDK-provided plugins
  * Leave your custom plugin folders untouched

Always verify that:
  * Plugin names remain unchanged
  * No references to your custom content are lost

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===== Final Checks =====

After merging the new SDK version:

  * Open **SubwaySim2.uproject**
  * Let Unreal Engine recompile shaders if required
  * Check the Output Log for warnings or errors
  * Run **BuildMod.bat** once to verify that cooking still works

If everything completes without errors, the SDK update was successful.

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Keeping your Modding SDK up to date ensures long-term compatibility with SubwaySim 2 and prevents issues when new game updates are released.

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