Owlsys: Create page for Flap

2026-03-14T11:35:48Z

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Flap is a javaagent allowing for pre-launch cross-intermediary remapping of mods.

=== Installation ===

Flap is currently shipped by the native [[Ornithe Installer]] by default. It is not included by the java-based installer as of 2026-03-14.

=== Supported Intermediaries ===

Flap supports the following intermediary variants out of the box:

* Official (Upstream Fabric)
* LegacyFabric (Version 1 & Version 2)
* Babric (Old Format & New Format)
* Ornithe (Version 1 & Version 2)
* Antiquity (obfuscated)

=== Configuration ===

Should Flap not detect a mod's variant correctly it is possible to override it.

==== Config File ====

Flap will read a config file at <code>config/flap/mod_variants.json</code>

Example:

{
"modid": "ORNITHE_V2"
}

==== JVM Properties ====

Flap will also check system properties at <code>flap.intermediary_variant_fallback.modid</code>.

Example:

-Dflap.intermediary_variant_fallback.modid=ORNITHE_V2

Flap - Revision history

Owlsys: Create page for Flap