diff --git a/justfile b/justfile
new file mode 100644
index 000000000..e9bc922ab
--- /dev/null
+++ b/justfile
@@ -0,0 +1,47 @@
+# justfile is from SkywardMC https://github.com/skywardmc/.github
+alias e := export
+alias r := refresh
+alias u := update
+
+set windows-shell := ["powershell.exe", "-NoLogo", "-Command"]
+
+default:
+    @just --list
+
+[private]
+[windows]
+_batchcmd cmd loader:
+    Get-ChildItem -Path versions\{{ if loader == "all" { "*\\*" } else { loader } }} -Directory | % { \
+      Set-Location $_.FullName; \
+      Write-Host "running {{ cmd }} in" versions\loader\$_; \
+      Invoke-Expression "{{ cmd }}"; \
+      Pop-Location; \
+    }
+
+[linux]
+[macos]
+[private]
+_batchcmd cmd loader:
+    for d in versions/{{ if loader == "all" { "*" } else { loader } }}/*/; do \
+      pushd "$d" &> /dev/null; \
+      echo "running {{ cmd }} in $d..."; \
+      {{ cmd }}; \
+      popd &> /dev/null; \
+    done
+
+# all versions of <loader> (or "all") will be exported as a modrinth modpack
+[linux]
+[macos]
+export loader: && (_batchcmd "packwiz modrinth export; mv *.mrpack ../../../build/" loader)
+    -mkdir -p build/
+
+# all versions of <loader> (or "all") will be exported as a modrinth modpack
+[windows]
+export loader: && (_batchcmd "packwiz modrinth export; Move-Item -Force -Path *.mrpack -Destination ../../../build/" loader)
+    -New-Item -Force -Type Directory -Path build/
+
+# all versions of <loader> (or "all") will have pack.toml & index.toml refreshed
+refresh loader: && (_batchcmd "packwiz refresh" loader)
+
+# all versions of <loader> (or "all") will be updated
+update loader: && (_batchcmd "packwiz update --all" loader)