diff --git a/.github/workflows/validate.yml b/.github/workflows/validate.yml
new file mode 100644
index 000000000..66b9529b7
--- /dev/null
+++ b/.github/workflows/validate.yml
@@ -0,0 +1,13 @@
+name: validate
+
+on: [push, workflow_dispatch]
+
+# TODO: add linting
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: CarbonSmasher/packtest_runner@9d13d673bf9d3f2fad2b833d036e5e12ff65e056
+        with:
+          packs: 'datapacks/omega-flowey'
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 000000000..e69de29bb
diff --git a/README.md b/README.md
index fffe1f8cc..044a85a86 100644
--- a/README.md
+++ b/README.md
@@ -6,3 +6,13 @@ Back in early 2016 I released `Omega Flowey in Minecraft`.
 - [original thread](https://www.reddit.com/r/Undertale/comments/4a9jht/spoilers_omega_flowey_boss_fight_in_minecraft/)
 
 Since then I've gained a lot of skills both in Minecraft map development and in programming generally. This repo will store any and everything relating to development of a remaster of the original map for modern Minecraft version(s) with better gameplay, performance, and visuals.
+
+## Contributing
+
+### Setup
+
+1. Configure git to automatically update submodules with `git pull`s by defaulting the `submodule.recurse` flag to `true`:
+
+```bash
+git config --global submodule.recurse true
+```
diff --git a/datapacks/omega-flowey/data/utils/functions/math/max.mcfunction b/datapacks/omega-flowey/data/utils/functions/math/max.mcfunction
index 8a80dffb5..e133a9204 100644
--- a/datapacks/omega-flowey/data/utils/functions/math/max.mcfunction
+++ b/datapacks/omega-flowey/data/utils/functions/math/max.mcfunction
@@ -3,7 +3,7 @@
 #   b: int
 # outputs:
 #   out: the higher value between `a` and `b` (Math.max(a, b))
-execute store result score @s math.0 run data get storage utils:math.max a
-execute store result score @s math.1 run data get storage utils:math.max b
-execute store result storage utils:math.max out int 1 run scoreboard players get @s math.0
-execute if score @s math.0 < @s math.1 store result storage utils:math.max out int 1 run scoreboard players get @s math.1
+execute store result score #utils:math.max math.0 run data get storage utils:math.max a
+execute store result score #utils:math.max math.1 run data get storage utils:math.max b
+execute store result storage utils:math.max out int 1 run scoreboard players get #utils:math.max math.0
+execute if score #utils:math.max math.0 < #utils:math.max math.1 store result storage utils:math.max out int 1 run scoreboard players get #utils:math.max math.1
diff --git a/datapacks/omega-flowey/data/utils/functions/math/min.mcfunction b/datapacks/omega-flowey/data/utils/functions/math/min.mcfunction
index 03750166f..02ac31718 100644
--- a/datapacks/omega-flowey/data/utils/functions/math/min.mcfunction
+++ b/datapacks/omega-flowey/data/utils/functions/math/min.mcfunction
@@ -3,7 +3,7 @@
 #   b: int
 # outputs:
 #   out: the lower value between `a` and `b` (Math.min(a, b))
-execute store result score @s math.0 run data get storage utils:math.min a
-execute store result score @s math.1 run data get storage utils:math.min b
-execute store result storage utils:math.min out int 1 run scoreboard players get @s math.0
-execute if score @s math.0 > @s math.1 store result storage utils:math.min out int 1 run scoreboard players get @s math.1
+execute store result score #utils:math.min math.0 run data get storage utils:math.min a
+execute store result score #utils:math.min math.1 run data get storage utils:math.min b
+execute store result storage utils:math.min out int 1 run scoreboard players get #utils:math.min math.0
+execute if score #utils:math.min math.0 > #utils:math.min math.1 store result storage utils:math.min out int 1 run scoreboard players get #utils:math.min math.1
diff --git a/datapacks/omega-flowey/data/utils/tests/math/max.mcfunction b/datapacks/omega-flowey/data/utils/tests/math/max.mcfunction
new file mode 100644
index 000000000..18cd8ae5e
--- /dev/null
+++ b/datapacks/omega-flowey/data/utils/tests/math/max.mcfunction
@@ -0,0 +1,27 @@
+# @batch utils:math
+
+# setup
+data remove storage utils:math.max a
+data remove storage utils:math.max b
+data remove storage utils:math.max out
+scoreboard players reset *
+function omega-flowey:setup
+
+# cases
+data merge storage utils:math.max { a: 10, b: 10 }
+function utils:math/max
+execute store result score #utils:math.max math.0 run data get storage utils:math.max out
+
+assert score #utils:math.max math.0 matches 10
+
+data merge storage utils:math.max { a: 0, b: 1 }
+function utils:math/max
+execute store result score #utils:math.max math.0 run data get storage utils:math.max out
+
+assert score #utils:math.max math.0 matches 1
+
+data merge storage utils:math.max { a: 2, b: 1 }
+function utils:math/max
+execute store result score #utils:math.max math.0 run data get storage utils:math.max out
+
+assert score #utils:math.max math.0 matches 2
diff --git a/datapacks/omega-flowey/data/utils/tests/math/min.mcfunction b/datapacks/omega-flowey/data/utils/tests/math/min.mcfunction
new file mode 100644
index 000000000..88e1cc2dd
--- /dev/null
+++ b/datapacks/omega-flowey/data/utils/tests/math/min.mcfunction
@@ -0,0 +1,27 @@
+# @batch utils:math
+
+# setup
+data remove storage utils:math.min a
+data remove storage utils:math.min b
+data remove storage utils:math.min out
+scoreboard players reset *
+function omega-flowey:setup
+
+# cases
+data merge storage utils:math.min { a: 10, b: 10 }
+function utils:math/min
+execute store result score #utils:math.min math.0 run data get storage utils:math.min out
+
+assert score #utils:math.min math.0 matches 10
+
+data merge storage utils:math.min { a: 0, b: 1 }
+function utils:math/min
+execute store result score #utils:math.min math.0 run data get storage utils:math.min out
+
+assert score #utils:math.min math.0 matches 0
+
+data merge storage utils:math.min { a: 2, b: 1 }
+function utils:math/min
+execute store result score #utils:math.min math.0 run data get storage utils:math.min out
+
+assert score #utils:math.min math.0 matches 1
diff --git a/pull_request_template.md b/pull_request_template.md
index faf617b3d..4de7ebafe 100644
--- a/pull_request_template.md
+++ b/pull_request_template.md
@@ -7,6 +7,13 @@ what is the primary purpose of this PR?
 
 ---
 
+## Test plan
+<!--
+does this PR include any unit tests for its new code?
+if yes, briefly describe them.
+if no, explain why.
+-->
+
 ## Reproducing in-game
 <!--
 how to view the thing you added in-game (Minecraft), if applicable.
diff --git a/world.zip b/world.zip
index 97a2800b5..7c4db556e 100644
Binary files a/world.zip and b/world.zip differ