From 261eb8f086fa984756f7798f90ed2bb6456ae110 Mon Sep 17 00:00:00 2001
From: CHOMPStation2StaffMirrorBot
 <94713762+CHOMPStation2StaffMirrorBot@users.noreply.github.com>
Date: Sun, 8 Feb 2026 06:51:34 -0700
Subject: [PATCH] [MIRROR] Partial revert of previous SSchem change (#12389)

Co-authored-by: Will <7099514+Willburd@users.noreply.github.com>
---
 code/controllers/subsystems/chemistry.dm | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/code/controllers/subsystems/chemistry.dm b/code/controllers/subsystems/chemistry.dm
index df2b23bf0a..80dab74121 100644
--- a/code/controllers/subsystems/chemistry.dm
+++ b/code/controllers/subsystems/chemistry.dm
@@ -63,6 +63,9 @@ SUBSYSTEM_DEF(chemistry)
 					LAZYINITLIST(chemical_reactions_by_product[D.result])
 					chemical_reactions_by_product[D.result] |= D // for reverse lookup
 
+			// we want to maintain original chemistry behavior, but still document all reactions above, only add to this list with the first reagent
+			if(i > 1)
+				continue
 			LAZYINITLIST(add_to[reagent_id])
 			add_to[reagent_id] |= D