Simple Modpack Update Checker

update to 26.1

fabric api required

Major Changes

JSON Configuration with Automatic Migration

• Configuration files now use JSON format (simple-modpack-update-checker.json)
• Old .txt configuration files are automatically converted to JSON on first run
• Automatic backup of old configuration as .backup file before deletion
• Configuration versioning for future updates

Minecraft Version Filtering (optional)

• Filter updates by specific Minecraft versions using minecraftVersions array
• example "minecraftVersions": ["1.21.4", "1.21.5"] only shows updates compatible with those versions

Release Channel Support (optional)

• Choose update channels with releaseChannel field
• channels:
  • "release" (default) - Stable releases only
  • "beta" - beta and stable releases
  • "alpha" - alpha, beta, and stable releases

Configuration Options

Field	Required	Description	Default	Example
configVersion	✅	Configuration file version	2	2
localVersion	✅	Current version of your modpack	-	"3.3.3"
identifier	✅	Modrinth project ID or URL	-	"KmiWHzQ4"
minecraftVersions	❌	Specific Minecraft version to track (Modrinth only)	All versions	["1.21.4", "1.21.5"]
releaseChannel	❌	Release channel to follow (Modrinth only)	"release"	"beta", "alpha"

Configuration Examples

Minimal Setup

{
  "configVersion": 2,
  "localVersion": "3.3.3",
  "identifier": "KmiWHzQ4"
}

Advanced Setup

{
  "configVersion": 2,
  "localVersion": "3.3.3",
  "identifier": "KmiWHzQ4",
  "minecraftVersions": ["1.21.4", "1.21.5"],
  "releaseChannel": "beta"
}

Configuration

The configuration file is located at config/simple-modpack-update-checker.txt and should contain two lines:

1. Local Version: The current version of the installed modpack. This can be any string. Quotation marks are not needed
2. Identifier: Either a URL to a text file containing the latest version (formatted as version = "String", eg your pack.toml from packwiz) or the Modrinth project ID.

Examples

Using a URL:

3.3.3
https://raw.githubusercontent.com/SkyblockerMod/Skyblocker-modpack/main/packwiz/pack.toml

Using a Modrinth Project ID:

3.3.3
KmiWHzQ4