diff --git a/Project.toml b/Project.toml
index 820336a319..2d8409a575 100644
--- a/Project.toml
+++ b/Project.toml
@@ -22,6 +22,7 @@ Preferences = "21216c6a-2e73-6563-6e65-726566657250"
 Random = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
 ReactantCore = "a3311ec8-5e00-46d5-b541-4f83e724a433"
 Reactant_jll = "0192cb87-2b54-54ad-80e0-3be72ad8a3c0"
+ScopedSettings = "6ffd3f19-5aa5-475d-9277-f0318686a530"
 ScopedValues = "7e506255-f358-4e82-b7e4-beb19740aa63"
 Scratch = "6c6a2e73-6563-6170-7368-637461726353"
 Sockets = "6462fe0b-24de-5631-8697-dd941f90decc"
@@ -49,6 +50,7 @@ YaoBlocks = "418bc28f-b43b-5e0b-a6e7-61bbc1a2c1df"
 
 [sources]
 ReactantCore = {path = "lib/ReactantCore"}
+ScopedSettings = {url = "https://github.com/avik-pal/ScopedSettings.jl", rev = "ap/union_types"}
 
 [extensions]
 ReactantAbstractFFTsExt = "AbstractFFTs"
@@ -101,6 +103,7 @@ Random = "1.10"
 Random123 = "1.7"
 ReactantCore = "0.1.15"
 Reactant_jll = "0.0.237"
+ScopedSettings = "0.1.1"
 ScopedValues = "1.3.0"
 Scratch = "1.2"
 Sockets = "1.10"
diff --git a/docs/src/api/config.md b/docs/src/api/config.md
index a3915c078c..d6ffcc33a0 100644
--- a/docs/src/api/config.md
+++ b/docs/src/api/config.md
@@ -6,11 +6,6 @@ CollapsedDocStrings = true
 
 ## Scoped Values
 
-!!! warning
-
-    Currently options are scattered in the form of global variables and scoped values. We
-    are in the process of migrating all of them into scoped values.
-
 ```@docs
 Reactant.with_config
 ```
diff --git a/src/Compiler.jl b/src/Compiler.jl
index 2932390a5f..53743ce4ca 100644
--- a/src/Compiler.jl
+++ b/src/Compiler.jl
@@ -27,9 +27,42 @@ import Reactant: OptimizeCommunicationOptions, ShardyPropagationOptions, Compile
 
 import ..ReactantCore: correct_maybe_bcast_call
 
-const DEBUG_PRINT_CODEGEN = Ref(false)
-const DEBUG_DISABLE_RESHARDING = Ref(false)
-const DEBUG_ALIASED_BUFFER_ASSIGNMENT_ERROR = Ref(false)
+using ScopedSettings: ScopedSetting, GetPreference
+
+const DEBUG_PRINT_CODEGEN = ScopedSetting(
+    GetPreference(Reactant, "debug_print_codegen", false)
+)
+const DEBUG_DISABLE_RESHARDING = ScopedSetting(
+    GetPreference(Reactant, "debug_disable_resharding", false)
+)
+const DEBUG_ALIASED_BUFFER_ASSIGNMENT_ERROR = ScopedSetting(
+    GetPreference(Reactant, "debug_aliased_buffer_assignment_error", false)
+)
+const DEBUG_KERNEL = ScopedSetting(GetPreference(Reactant, "debug_kernel", false))
+const DUMP_LLVMIR = ScopedSetting(GetPreference(Reactant, "debug_dump_llvmir", false))
+const DUMP_FAILED_LOCKSTEP = ScopedSetting(
+    GetPreference(Reactant, "debug_dump_failed_lockstep", false)
+)
+const SROA_ATTRIBUTOR = ScopedSetting(GetPreference(Reactant, "sroa_attributor", false))
+
+const WHILE_CONCAT = ScopedSetting(GetPreference(Reactant, "while_concat_passes", false))
+const DUS_TO_CONCAT = ScopedSetting(GetPreference(Reactant, "dus_to_concat_passes", false))
+const SUM_TO_REDUCEWINDOW = ScopedSetting(
+    GetPreference(Reactant, "sum_to_reducewindow_passes", false)
+)
+const SUM_TO_CONV = ScopedSetting(GetPreference(Reactant, "sum_to_conv_passes", false))
+const AGGRESSIVE_SUM_TO_CONV = ScopedSetting(
+    GetPreference(Reactant, "aggressive_sum_to_conv_passes", false)
+)
+const AGGRESSIVE_PROPAGATION = ScopedSetting(
+    GetPreference(Reactant, "aggressive_propagation_passes", false)
+)
+const DUS_SLICE_SIMPLIFY = ScopedSetting(
+    GetPreference(Reactant, "dus_slice_simplify_passes", true)
+)
+const CONCATS_TO_DUS = ScopedSetting(GetPreference(Reactant, "concats_to_dus_passes", true))
+
+const OpenMP = ScopedSetting(GetPreference(Reactant, "lower_jit_to_openmp", true))
 
 const DEBUG_BUFFER_POINTERS_STORE_DICT = Base.IdDict()
 
@@ -684,15 +717,6 @@ function create_result(
     return Meta.quot(tocopy)
 end
 
-const WHILE_CONCAT = Ref(false)
-const DUS_TO_CONCAT = Ref(false)
-const SUM_TO_REDUCEWINDOW = Ref(false)
-const SUM_TO_CONV = Ref(false)
-const AGGRESSIVE_SUM_TO_CONV = Ref(false)
-const AGGRESSIVE_PROPAGATION = Ref(false)
-const DUS_SLICE_SIMPLIFY = Ref(true)
-const CONCATS_TO_DUS = Ref(false)
-
 # Optimization passes via transform dialect
 function optimization_passes(
     compile_options::CompileOptions;
@@ -1436,12 +1460,6 @@ function cubinFeatures()
     return "+ptx$ptx"
 end
 
-const DEBUG_KERNEL = Ref{Bool}(false)
-const DUMP_LLVMIR = Ref{Bool}(false)
-const DUMP_FAILED_LOCKSTEP = Ref{Bool}(false)
-const OpenMP = Ref{Bool}(true)
-const SROA_ATTRIBUTOR = Ref{Bool}(true)
-
 function activate_raising!(is_raising::Bool)
     stack = get!(task_local_storage(), :reactant_is_raising) do
         Bool[]
diff --git a/src/Configuration.jl b/src/Configuration.jl
index 5b0eaa00af..11a81f9c17 100644
--- a/src/Configuration.jl
+++ b/src/Configuration.jl
@@ -1,4 +1,4 @@
-using ScopedValues: ScopedValues, ScopedValue
+using ScopedValues: ScopedValues
 
 export with_config
 export DotGeneralAlgorithmPreset, PrecisionConfig, DotGeneralAlgorithm
@@ -63,8 +63,12 @@ function with_config(
 end
 
 # Lower to ApproxTopK
-const LOWER_PARTIALSORT_TO_APPROX_TOP_K = ScopedValue(false)
-const FALLBACK_APPROX_TOP_K_LOWERING = ScopedValue(true)
+const LOWER_PARTIALSORT_TO_APPROX_TOP_K = ScopedSetting(
+    GetPreference(Reactant, "lower_partialsort_to_approx_top_k", false)
+)
+const FALLBACK_APPROX_TOP_K_LOWERING = ScopedSetting(
+    GetPreference(Reactant, "fallback_approx_top_k_lowering", true)
+)
 
 # DotGeneral Attributes Configuration
 """
@@ -88,13 +92,13 @@ end
 
 Base.@deprecate_binding DotGeneralPrecision PrecisionConfig
 
-const DOT_GENERAL_PRECISION = ScopedValue{
+const DOT_GENERAL_PRECISION = ScopedSetting{
     Union{PrecisionConfig.T,Nothing,Tuple{PrecisionConfig.T,PrecisionConfig.T}}
 }(
     PrecisionConfig.DEFAULT
 )
 
-const CONVOLUTION_PRECISION = ScopedValue{
+const CONVOLUTION_PRECISION = ScopedSetting{
     Union{PrecisionConfig.T,Nothing,Tuple{PrecisionConfig.T,PrecisionConfig.T}}
 }(
     PrecisionConfig.DEFAULT
@@ -224,7 +228,7 @@ The following functions are available:
     TF32_TF32_F32_X3
 end
 
-const DOT_GENERAL_ALGORITHM = ScopedValue{
+const DOT_GENERAL_ALGORITHM = ScopedSetting{
     Union{DotGeneralAlgorithmPreset.T,Nothing,DotGeneralAlgorithm}
 }(
     DotGeneralAlgorithmPreset.DEFAULT
diff --git a/src/Ops.jl b/src/Ops.jl
index 805126ab46..dfa1fbf054 100644
--- a/src/Ops.jl
+++ b/src/Ops.jl
@@ -99,10 +99,16 @@ function mlir_type(::Type{<:MissingTracedValue})::MLIR.IR.Type
     return MLIR.IR.TensorType(Int[], MLIR.IR.Type(Bool))
 end
 
-const DEBUG_MODE::Ref{Bool} = Ref(false)
-const LARGE_CONSTANT_THRESHOLD = Ref(100 << 20) # 100 MiB
-const LARGE_CONSTANT_RAISE_ERROR = Ref(true)
-const GATHER_GETINDEX_DISABLED = Ref(false)
+const DEBUG_MODE = ScopedSetting(false)
+const LARGE_CONSTANT_THRESHOLD = ScopedSetting(
+    GetPreference(Reactant, "large_constant_threshold", 100 << 20) # 100 MiB
+)
+const LARGE_CONSTANT_RAISE_ERROR = ScopedSetting(
+    GetPreference(Reactant, "large_constant_raise_error", true)
+)
+const GATHER_GETINDEX_DISABLED = ScopedSetting(
+    GetPreference(Reactant, "gather_getindex_disabled", false)
+)
 
 function with_debug(f)
     old = DEBUG_MODE[]
diff --git a/src/Reactant.jl b/src/Reactant.jl
index d6da2c92dd..4100846f85 100644
--- a/src/Reactant.jl
+++ b/src/Reactant.jl
@@ -11,6 +11,8 @@ using Functors: Functors, @leaf
 using Adapt: Adapt, WrappedArray
 using GPUArraysCore: GPUArraysCore, @allowscalar, allowscalar # keep this import to allow users to do `Reactant.allowscalar(false)`
 
+using ScopedSettings: ScopedSetting, GetPreference
+
 export @allowscalar # re-exported from GPUArraysCore
 
 is_extension_loaded(::Val) = false
diff --git a/src/mlir/IR/IR.jl b/src/mlir/IR/IR.jl
index 3d429aeaf5..e948e6b25b 100644
--- a/src/mlir/IR/IR.jl
+++ b/src/mlir/IR/IR.jl
@@ -26,6 +26,8 @@ export @affinemap
 
 using Random: randstring
 
+using ScopedSettings: ScopedSetting, GetPreference
+
 function mlirIsNull(val)
     return val.ptr == C_NULL
 end
diff --git a/src/mlir/IR/Pass.jl b/src/mlir/IR/Pass.jl
index d0e69d7fdb..2523716dd1 100644
--- a/src/mlir/IR/Pass.jl
+++ b/src/mlir/IR/Pass.jl
@@ -65,9 +65,11 @@ function enable_verifier!(pm, enable=true)
 end
 
 # Where to dump the MLIR modules
-const DUMP_MLIR_DIR = Ref{Union{Nothing,String}}(nothing)
+const DUMP_MLIR_DIR = ScopedSetting{Union{Nothing,String}}(
+    GetPreference(Reactant, "dump_mlir_dir", nothing)
+)
 # Whether to always dump MLIR, regardless of failure
-const DUMP_MLIR_ALWAYS = Ref{Bool}(false)
+const DUMP_MLIR_ALWAYS = ScopedSetting(GetPreference(Reactant, "dump_mlir_always", false))
 # Counter for dumping MLIR modules
 const MLIR_DUMP_COUNTER = Threads.Atomic{Int}(0)
 
diff --git a/src/utils.jl b/src/utils.jl
index bed592af38..882736efdc 100644
--- a/src/utils.jl
+++ b/src/utils.jl
@@ -525,7 +525,7 @@ function safe_print(name, x)
     return ccall(:jl_, Cvoid, (Any,), name * " " * string(x))
 end
 
-const DEBUG_INTERP = Ref(false)
+const DEBUG_INTERP = ScopedSetting(GetPreference(Reactant, "debug_interpreter", false))
 
 # Rewrite type unstable calls to recurse into call_with_reactant to ensure
 # they continue to use our interpreter. Reset the derived return type