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Exact Mielon release files and GeckoLib records

GeckoLib dependencies for Mielon's The Sift

GeckoLib is a required animation library for the checked Mielon releases. The Sift file, Minecraft version and loader must match; Fabric also requires Fabric API. Several October 2 Modrinth dependency records link to a different loader, so use the exact release table and matching GeckoLib file.

Published Sources checked
On this page
  1. Match the animation library to your Sift file
  2. Use an exact release row
  3. Avoid the mismatched dependency links
  4. Check the four labels before launching
  5. Resolve a dependency message before attempting the portal
  6. Sources and verification date
A concept illustration of bookshelves, a map on a stone desk and a sunlit ruined valley accompanies this GeckoLib mod file-matching guide.
Original concept art · imagined setting, not gameplay

Match the animation library to your Sift file

The GeckoLib mod is required by the Mielon releases listed below. Match its Minecraft version and loader to the specific Sift file you are installing. GeckoLib is an animation library used by other mods; adding it alone does not provide Mielon’s dimension or its portal mechanics.

There is an additional reason to check the file carefully: on October 2, 2026, several of Mielon’s Modrinth release records associate GeckoLib with a different loader. The actual Sift package declares the required version range, while the GeckoLib release record identifies which game and loader its file supports.

Use an exact release row

The table follows four specific files checked on October 2, 2026. It is a file reference, not a promise that the same requirements apply to every future release. The Fabric rows use fabric.mod.json; the NeoForge and Forge rows use their packaged mod metadata.

Mielon release and record Minecraft / loader requirement GeckoLib requirement Other declared requirements
1.1.2 Fabric 26.3 — QK8RaspH Minecraft 26.3 branch; Fabric Loader 0.19.5 or later 5.5.6 or later, with a Fabric 26.3 file Java 25 or later; Fabric API 0.160.5+26.3 or later
1.1.2 Fabric 26.2 — FjiiWlMl Minecraft 26.2 branch; Fabric Loader 0.19.3 or later 5.5.3 or later, with a Fabric 26.2 file Java 25 or later; Fabric API required, with no minimum in this package’s declaration
1.1.2 NeoForge 1.21.1 — XH0t8Qsq Minecraft 1.21.1; NeoForge at least 21.1.62 and below 21.2 At least 4.6.6 and below 5, with a NeoForge 1.21.1 file Java 21 branch setup; Fabric API is not declared
1.1.1 Forge 1.20.1 — 5Q29ntDl Minecraft at least 1.20.1 and below 1.20.2; Forge at least 47.2.0 and below 48 At least 4.4.9 and below 5, with a Forge 1.20.1 file Java 17 branch setup; Fabric API is not declared

The two Fabric files also recommend LambDynamicLights: at least 4.13.0 for 26.3 and 4.12.2 for 26.2. Their packages list it separately from required dependencies. Keep that distinction when choosing the minimum set of mods to install.

For Forge and NeoForge, the metadata’s loaderVersion refers to the mod-loading language, not a Java version. Do not read [47,) or [4,) as a Java requirement. The branch-specific NeoForge 1.21.1 documentation identifies Java 21; the Forge 1.20.1 documentation identifies Java 17. These Java references come from the loader documentation, while the Fabric Java 25 requirement comes directly from each Sift package.

The Modrinth API resolves a release’s linked dependency by file ID. The records checked here contain these conflicts:

Sift release record Linked GeckoLib release Conflict Matching file to inspect
QK8RaspH, Fabric 26.3 uGEFXLKA, GeckoLib 5.5.6 The linked file is NeoForge 26.3 GeckoLib 5.5.6 Fabric 26.3 — 1VWnZPbQ
FjiiWlMl, Fabric 26.2 uGEFXLKA, GeckoLib 5.5.6 The linked file is NeoForge 26.3 GeckoLib 5.5.3 Fabric 26.2 — L6bn4TS8
5Q29ntDl, Forge 1.20.1 maatiOOo, GeckoLib 4.4.9 The linked file is NeoForge 1.20.1 GeckoLib 4.4.9 Forge 1.20.1 — RBA7lJaW
XH0t8Qsq, NeoForge 1.21.1 qj2pTqCr, GeckoLib 4.6.6 Game and loader match GeckoLib 4.6.6 NeoForge 1.21.1 — qj2pTqCr

The linked files in the final column meet the named minimum and have the matching game/loader label. This is a metadata check; it does not claim a tested combination in every modpack. When a launcher offers automatic dependency installation, inspect the resolved file’s labels before accepting it.

There is also an optional-dependency conflict in FjiiWlMl: it links LambDynamicLights rylKnJ4M, labeled 26.3, although that Sift file is for 26.2. Choose a matching 26.2 file if you want that recommended library.

Check the four labels before launching

  1. Open your launcher profile and identify its Minecraft version and loader.
  2. Select the Mielon Sift file from the matching row. Keep the release record ID or complete filename with your setup notes.
  3. Open the GeckoLib file page and check Minecraft version, loader and library version. Compare all three with that row’s constraint.
  4. For Fabric, add a matching Fabric API file and satisfy the declared loader and Java requirements. Add recommended libraries only for the same game branch.
  5. Place the chosen mod files in the profile’s mods folder using your launcher’s installation flow, then launch that profile.

If you are setting up a dedicated server, use the same release branch and required compatible libraries. The Forge and NeoForge packages declare GeckoLib on both sides, and the Fabric files declare the mod for all environments. Do not treat the library as a cosmetic client-only addition.

Resolve a dependency message before attempting the portal

If the game reports a missing GeckoLib dependency, check that the library file is in the active profile’s mods folder and matches its game and loader. A downloaded file in another profile does not satisfy this profile’s requirement.

If the message names a version constraint, compare it with the exact row above. Installing a higher major version is not an automatic fix: the checked Forge and NeoForge packages require GeckoLib below version 5. If it names Fabric API, use the Fabric row’s declared requirement.

Keep the exact error text, Sift release ID, loader version and dependency filenames when reporting a problem to the author. Those details distinguish a missing library from the conflicting file association identified here. This page does not reproduce or attribute a crash without an actual error log.

Once the profile launches with the intended files, continue with the Mielon portal sequence or first-trip guide. For a different Sift project, use the compatibility checker and that project’s own author instructions.

Sources and verification date

The library’s role and player installation guidance follow the GeckoLib author page. Release record IDs, supported loaders and dependency associations were checked through Mielon’s release API and the linked individual release records on October 2, 2026. Requirements in the first table come from each named Sift package’s own metadata. Recheck those records when selecting a different release.