You Shall Not Climb!
by SyberiaK
You Shall Not Climb! is a server-side Fabric and NeoForge mod that stops mobs from climbing ladders.
What it does
The mod removes the ability of mobs to climb ladders, a behavior that the author describes as a side effect rather than an intended design. The change is limited to ladder climbing and leaves other mob movement alone. Only the server needs the mod, so players join without installing anything. Fabric API is optional on Fabric and the license is MIT, which makes the code open source.
Key features
Ladder climbing disabled
Mobs no longer climb ladders, which the author treats as a fix for the Mojang bug report MC-148545.
Mob movement left intact
Only the ability to climb ladders is removed, while other mob movement continues as before.
Public issue tracker
Bug reports and changes are handled through a public issue tracker linked from the mod page.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Optional 1
How it compares
Trapdoors and Ladders is a Fabric-only server-side mod for 1.20.1 – 1.21.3 under All rights reserved, so its source is not open. Right Click Ladder is a NeoForge mod for 1.21.1 – 1.21.8 with client and server parts, released under the MIT License.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| You Shall Not Climb! | Fabric and NeoForge | 1.20.5 – 1.21 | Server-side only | 2024-06-14 |
| Trapdoors and Ladders | Fabric | 1.20.1 – 1.21.3 | Server-side only | 2024-10-31 |
| Right Click Ladder | NeoForge | 1.21.1 – 1.21.8 | Client and server | 2025-09-01 |
Questions
Does You Shall Not Climb! need Fabric API?
Do players need the mod installed?
Which game versions are supported?
In the catalog
You Shall Not Climb! is one of 11,058 Mobs mods on ModsFinder, and one of 5,189 Mobs mods for Fabric. 15,770 mods support Minecraft 1.21.
More from SyberiaK
Similar mods
What the author says
"You Shall Not Climb!" (YSNC) is a Fabric server-side mod that takes away an ability to climb ladders from mobs that are not supposed to have it. MC-148545 "Mobs can climb ladders" was labeled by Mojang as "Works As Intended".
Official listing
- Modrinth page
- modrinth.com/mod/ysnc
- Owner
- SyberiaK
- Published
- 2024-06-14
- Updated on Modrinth
- 2024-06-14
- Facts verified
- 2026-10-15