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Stamp

A minimal, client-side Fabric utility mod for Minecraft 1.21.1 designed for automated sign text repetition on anarchy servers like 2B2T.

Stamp intercepts outgoing chat commands, caches manually entered sign text, and automatically pre-fills and submits subsequent signs with a safety cooldown to avoid server-side packet filters.

Features

• Client-Side Commands: Commands (.stamp on, .stamp off, .stamp) are intercepted inside the client's network handler before packets are constructed, making them completely invisible to server-side chat logs or plugins.
• Vanilla-Compliant Packet Flow: Stamp modifies the GUI's native messages array during initialization. The text is submitted using Minecraft's own finishEditing pipeline, maintaining perfect vanilla packet compliance to bypass strict anti-cheat heuristics.
• Cooldown-Based Auto-Submit: Once the sign screen opens pre-filled, the mod waits 500ms before triggering submission. This delay prevents rapid-packet rate-limit kicks on high-frequency server filters.
• Survival Hand Detection: Intelligently handles survival placing where placing the last sign in a stack leaves the hand empty before the GUI initializes, ensuring the auto-signer does not deactivate prematurely.

!demo

Usage

1. Type .stamp on in chat to enable the utility.
2. Place a sign and write your text manually. Pressing Done caches the lines.
3. Every next sign placed will open pre-filled with the cached text and automatically submit after a 500ms delay.
4. Type .stamp off to disable the mod and clear the cache. Re-enabling starts with a fresh cache.

Chat Commands

• .stamp on - Enables the mod and readies the cache.
• .stamp off - Disables the mod and clears the active cache.
• .stamp - Prints the help usage locally.