ADDED Can pass config parameters to compiler and select code based on it. Can also select code based on compiler version.

40 files changed, 710 insertions, 323 deletions

diff --git a/stdlib/source/library/lux.lux b/stdlib/source/library/lux.lux
index 69f555fee..20122f66c 100644
--- a/stdlib/source/library/lux.lux
+++ b/stdlib/source/library/lux.lux
@@ -566,9 +566,10 @@
 
 ... (type: .public Info
 ...   (Record
-...    [#target  Text
-...     #version Text
-...     #mode    Mode]))
+...    [#target        Text
+...     #version       Text
+...     #mode          Mode
+...     #configuration (List [Text Text])]))
 ("lux def type tagged" Info
  {#Named [..prelude_module "Info"]
          {#Product
@@ -577,9 +578,12 @@
           {#Product
            ... version
            Text
-           ... mode
-           Mode}}}
- ["#target" "#version" "#mode"]
+           {#Product
+            ... mode
+            Mode
+            ... configuration
+            {#Apply {#Product Text Text} List}}}}}
+ ["#target" "#version" "#mode" "#configuration"]
  .public)
 
 ... (type: .public Lux
diff --git a/stdlib/source/library/lux/data/collection/dictionary/plist.lux b/stdlib/source/library/lux/data/collection/dictionary/plist.lux
index d646287c8..7eb2f4001 100644
--- a/stdlib/source/library/lux/data/collection/dictionary/plist.lux
+++ b/stdlib/source/library/lux/data/collection/dictionary/plist.lux
@@ -1,16 +1,17 @@
 (.using
-  [library
-   [lux "*"
-    [abstract
-     [equivalence {"+" Equivalence}]]
-    [data
-     ["[0]" product]
-     ["[0]" text ("[1]#[0]" equivalence)]
-     [collection
-      ["[0]" list ("[1]#[0]" functor)]]]
-    [math
-     [number
-      ["n" nat]]]]])
+ [library
+  [lux "*"
+   [abstract
+    [equivalence {"+" Equivalence}]
+    [monoid {"+" Monoid}]]
+   [data
+    ["[0]" product]
+    ["[0]" text ("[1]#[0]" equivalence)]
+    [collection
+     ["[0]" list ("[1]#[0]" functor mix)]]]
+   [math
+    [number
+     ["n" nat]]]]])
 
 ... https://en.wikipedia.org/wiki/Property_list
 (type: .public (PList a)
@@ -97,3 +98,15 @@
   (All (_ a) (-> (Equivalence a) (Equivalence (PList a))))
   (|>> (product.equivalence text.equivalence)
        list.equivalence))
+
+(implementation: .public monoid
+  (All (_ a) (Monoid (PList a)))
+
+  (def: identity
+    ..empty)
+
+  (def: (composite left right)
+    (list#mix (function (_ [key val] it)
+                (..has key val it))
+              right
+              left)))
diff --git a/stdlib/source/library/lux/meta.lux b/stdlib/source/library/lux/meta.lux
index d16ca46b9..8bf80bce5 100644
--- a/stdlib/source/library/lux/meta.lux
+++ b/stdlib/source/library/lux/meta.lux
@@ -665,8 +665,14 @@
       {try.#Failure error}
       {try.#Success [lux {try.#Failure error}]})))
 
-(def: .public target
-  (Meta Text)
-  (function (_ lux)
-    {try.#Success [lux
-                   (value@ [.#info .#target] lux)]}))
+(template [<type> <name> <slot>]
+  [(def: .public <name>
+     (Meta <type>)
+     (function (_ lux)
+       {try.#Success [lux
+                      (value@ [.#info <slot>] lux)]}))]
+
+  [Text target .#target]
+  [Text version .#version]
+  [(List [Text Text]) configuration .#configuration]
+  )
diff --git a/stdlib/source/library/lux/meta/configuration.lux b/stdlib/source/library/lux/meta/configuration.lux
new file mode 100644
index 000000000..057466051
--- /dev/null
+++ b/stdlib/source/library/lux/meta/configuration.lux
@@ -0,0 +1,103 @@
+(.using
+ [library
+  [lux {"-" for}
+   ["[0]" meta]
+   [abstract
+    [equivalence {"+" Equivalence}]
+    [monoid {"+" Monoid}]
+    [monad {"+" do}]]
+   [control
+    ["[0]" maybe ("[1]#[0]" functor)]
+    ["[0]" exception {"+" exception:}]
+    ["<>" parser
+     ["<[0]>" text {"+" Parser}]
+     ["<[0]>" code]]]
+   [data
+    ["[0]" text ("[1]#[0]" equivalence)
+     ["%" format]]
+    [collection
+     ["[0]" list ("[1]#[0]" functor mix)]
+     [dictionary
+      ["/" plist]]]]
+   [macro
+    [syntax {"+" syntax:}]
+    ["[0]" code]]
+   [math
+    [number {"+" hex}]]]])
+
+(type: .public Configuration
+  (/.PList Text))
+
+(def: .public equivalence
+  (Equivalence Configuration)
+  (/.equivalence text.equivalence))
+
+(def: .public monoid
+  (Monoid Configuration)
+  /.monoid)
+
+(def: .public empty
+  Configuration
+  /.empty)
+
+(template [<ascii> <name>]
+  [(def: <name>
+     Text
+     (text.of_char (hex <ascii>)))]
+
+  ["02" start]
+  ["03" end]
+  )
+
+(def: format'
+  (-> Text Text)
+  (text.enclosed [..start ..end]))
+
+(def: .public format
+  (%.Format Configuration)
+  (|>> (list#each (function (_ [feature value])
+                    (%.format (..format' feature) (..format' value))))
+       text.together))
+
+(def: .public parser
+  (Parser Configuration)
+  (let [parser' (: (Parser Text)
+                   (<| (<>.after (<text>.this ..start))
+                       (<>.before (<text>.this ..end))
+                       (<text>.slice (<text>.some! (<text>.none_of! ..end)))))]
+    (<>.some (<>.and parser' parser'))))
+
+(exception: .public invalid)
+
+(def: configuration
+  (<code>.Parser Configuration)
+  (<code>.tuple (<>.some (<>.and <code>.text <code>.text))))
+
+(def: (subsumes? actual expected)
+  (-> Configuration Configuration Bit)
+  (case expected
+    {.#End}
+    true
+
+    {.#Item [feature value] tail}
+    (and (|> actual
+             (/.value feature)
+             (maybe#each (text#= value))
+             (maybe.else false))
+         (subsumes? expected tail))))
+
+(syntax: .public (for [specializations (<code>.tuple (<>.some (<>.and ..configuration <code>.any)))
+                       default (<>.maybe <code>.any)])
+  (do meta.monad
+    [actual meta.configuration]
+    (case (list#mix (function (_ [expected then] choice)
+                      (if (subsumes? actual expected)
+                        {.#Some then}
+                        choice))
+                    default
+                    specializations)
+      {.#Some it}
+      (in (list it))
+      
+      {.#None}
+      (meta.failure (exception.error ..invalid [])))))
diff --git a/stdlib/source/library/lux/meta/version.lux b/stdlib/source/library/lux/meta/version.lux
new file mode 100644
index 000000000..66bf8e6f5
--- /dev/null
+++ b/stdlib/source/library/lux/meta/version.lux
@@ -0,0 +1,47 @@
+(.using
+ [library
+  [lux {"-" for}
+   ["[0]" meta]
+   [abstract
+    [monad {"+" do}]]
+   [control
+    ["[0]" exception {"+" exception:}]
+    ["<>" parser
+     ["<[0]>" code]]]
+   [data
+    ["[0]" text ("[1]#[0]" equivalence)]
+    [collection
+     ["[0]" list ("[1]#[0]" mix)]]]
+   [macro
+    [syntax {"+" syntax:}]
+    ["[0]" code]]
+   [tool
+    [compiler
+     [version {"+" Version}]]]]])
+
+(def: .public latest
+  Version
+  00,06,06)
+
+(syntax: .public (current [])
+  (do meta.monad
+    [it meta.version]
+    (in (list (code.text it)))))
+
+(exception: .public invalid)
+
+(syntax: .public (for [specializations (<code>.tuple (<>.some (<>.and <code>.text <code>.any)))
+                       default (<>.maybe <code>.any)])
+  (do meta.monad
+    [current meta.version]
+    (case (list#mix (function (_ [when then] choice)
+                      (if (text#= when current)
+                        {.#Some then}
+                        choice))
+                    default
+                    specializations)
+      {.#Some it}
+      (in (list it))
+      
+      {.#None}
+      (meta.failure (exception.error ..invalid [])))))
diff --git a/stdlib/source/library/lux/tool/compiler/default/init.lux b/stdlib/source/library/lux/tool/compiler/default/init.lux
index fc7e1b637..7f815abf9 100644
--- a/stdlib/source/library/lux/tool/compiler/default/init.lux
+++ b/stdlib/source/library/lux/tool/compiler/default/init.lux
@@ -18,6 +18,9 @@
      ["[0]" dictionary]
      ["[0]" set]
      ["[0]" sequence ("[1]#[0]" functor)]]]
+   [meta
+    ["[0]" configuration {"+" Configuration}]
+    ["[0]" version]]
    [world
     ["[0]" file]]]]
  ["[0]" // "_"
@@ -26,7 +29,6 @@
    [language
     [lux
      [program {"+" Program}]
-     ["[1][0]" version]
      ["[1][0]" syntax {"+" Aliases}]
      ["[1][0]" synthesis]
      ["[1][0]" directive {"+" Requirements}]
@@ -51,10 +53,11 @@
       ["[0]" descriptor]
       ["[0]" document]]]]]])
 
-(def: .public (state target module expander host_analysis host generate generation_bundle)
+(def: .public (state target module configuration expander host_analysis host generate generation_bundle)
   (All (_ anchor expression directive)
     (-> Target
         descriptor.Module
+        Configuration
         Expander
         ///analysis.Bundle
         (///generation.Host expression directive)
@@ -65,7 +68,7 @@
         generation_state [generation_bundle (///generation.state host module)]
         eval (///analysis/evaluation.evaluator expander synthesis_state generation_state generate)
         analysis_state [(analysisE.bundle eval host_analysis)
-                        (///analysis.state (///analysis.info ///version.version target))]]
+                        (///analysis.state (///analysis.info version.latest target configuration))]]
     [extension.empty
      [///directive.#analysis [///directive.#state analysis_state
                               ///directive.#phase (analysisP.phase expander)]
diff --git a/stdlib/source/library/lux/tool/compiler/default/platform.lux b/stdlib/source/library/lux/tool/compiler/default/platform.lux
index 2ddc8a689..f489c1fb8 100644
--- a/stdlib/source/library/lux/tool/compiler/default/platform.lux
+++ b/stdlib/source/library/lux/tool/compiler/default/platform.lux
@@ -3,7 +3,6 @@
   [lux "*"
    ["@" target]
    ["[0]" debug]
-   ["[0]" meta]
    [abstract
     ["[0]" monad {"+" Monad do}]]
    [control
@@ -27,6 +26,8 @@
      ["[0]" list ("[1]#[0]" monoid functor mix)]]
     [format
      ["_" binary {"+" Writer}]]]
+   ["[0]" meta
+    ["[0]" configuration {"+" Configuration}]]
    [type {"+" :sharing}
     ["[0]" check]]
    [world
@@ -40,7 +41,6 @@
     [lux
      [program {"+" Program}]
      ["$" /]
-     ["[1][0]" version]
      ["[0]" syntax]
      ["[1][0]" synthesis]
      ["[1][0]" generation {"+" Buffer}]
@@ -240,7 +240,7 @@
        (dictionary.merged directives (host_directive_bundle phase_wrapper))])
 
     (def: .public (initialize context module expander host_analysis platform generation_bundle host_directive_bundle program anchorT,expressionT,directiveT extender
-                              import compilation_sources)
+                              import compilation_sources compilation_configuration)
       (All (_ <type_vars>)
         (-> Context
             descriptor.Module
@@ -251,18 +251,19 @@
             (-> ///phase.Wrapper (///directive.Bundle <type_vars>))
             (Program expression directive)
             [Type Type Type] (-> ///phase.Wrapper Extender)
-            Import (List _io.Context)
+            Import (List _io.Context) Configuration
             (Async (Try [<State+> Archive ///phase.Wrapper]))))
       (do [! (try.with async.monad)]
         [.let [state (//init.state (value@ context.#host context)
                                    module
+                                   compilation_configuration
                                    expander
                                    host_analysis
                                    (value@ #host platform)
                                    (value@ #phase platform)
                                    generation_bundle)]
          _ (cache.enable! (value@ #&file_system platform) context)
-         [archive analysis_state bundles] (ioW.thaw (value@ #host platform) (value@ #&file_system platform) context import compilation_sources)
+         [archive analysis_state bundles] (ioW.thaw compilation_configuration (value@ #host platform) (value@ #&file_system platform) context import compilation_sources)
          .let [with_missing_extensions
                (: (All (_ <type_vars>)
                     (-> <Platform> (Program expression directive) <State+>
@@ -753,7 +754,7 @@
       (def: .public (compile phase_wrapper import file_context expander platform compilation context)
         (All (_ <type_vars>)
           (-> ///phase.Wrapper Import Context Expander <Platform> Compilation <Context> <Return>))
-        (let [[host_dependencies libraries compilers sources target module] compilation
+        (let [[host_dependencies libraries compilers sources target module configuration] compilation
               importer (|> (..compiler phase_wrapper expander platform)
                            (serial_compiler import file_context platform sources)
                            (..parallel context))]
diff --git a/stdlib/source/library/lux/tool/compiler/language/lux.lux b/stdlib/source/library/lux/tool/compiler/language/lux.lux
index 566a7afa9..faf7f3b90 100644
--- a/stdlib/source/library/lux/tool/compiler/language/lux.lux
+++ b/stdlib/source/library/lux/tool/compiler/language/lux.lux
@@ -6,9 +6,10 @@
      ["<b>" binary {"+" Parser}]]]
    [data
     [format
-     ["_" binary {"+" Writer}]]]]]
+     ["_" binary {"+" Writer}]]]
+   [meta
+    ["[0]" version]]]]
  ["[0]" / "_"
-  ["[1][0]" version]
   [analysis
    ["[0]" module]]
   [///
@@ -86,5 +87,5 @@
 (def: .public key
   (Key .Module)
   (key.key [signature.#name (symbol ..compiler)
-            signature.#version /version.version]
+            signature.#version version.latest]
            (module.empty 0)))
diff --git a/stdlib/source/library/lux/tool/compiler/language/lux/analysis.lux b/stdlib/source/library/lux/tool/compiler/language/lux/analysis.lux
index 5ac2fda49..650842124 100644
--- a/stdlib/source/library/lux/tool/compiler/language/lux/analysis.lux
+++ b/stdlib/source/library/lux/tool/compiler/language/lux/analysis.lux
@@ -28,7 +28,8 @@
      ["r" rev]
      ["f" frac]]]
    [meta
-    ["[0]" location]]]]
+    ["[0]" location]
+    ["[0]" configuration {"+" Configuration}]]]]
  ["[0]" / "_"
   ["[1][0]" simple {"+" Simple}]
   ["[1][0]" complex {"+" Tuple Variant Complex}]
@@ -356,11 +357,12 @@
    .#var_counter 0
    .#var_bindings (list)])
 
-(def: .public (info version host)
-  (-> Version Text Info)
+(def: .public (info version host configuration)
+  (-> Version Text Configuration Info)
   [.#target host
    .#version (version.format version)
-   .#mode {.#Build}])
+   .#mode {.#Build}
+   .#configuration configuration])
 
 (def: .public (state info)
   (-> Info Lux)
diff --git a/stdlib/source/library/lux/tool/compiler/language/lux/phase/generation/jvm/host.lux b/stdlib/source/library/lux/tool/compiler/language/lux/phase/generation/jvm/host.lux
index c9ad8c0eb..d4c947953 100644
--- a/stdlib/source/library/lux/tool/compiler/language/lux/phase/generation/jvm/host.lux
+++ b/stdlib/source/library/lux/tool/compiler/language/lux/phase/generation/jvm/host.lux
@@ -38,9 +38,6 @@
       ["[0]" descriptor]]]]
    [tool
     [compiler
-     [language
-      [lux
-       [version {"+" version}]]]
      [meta
       [io {"+" lux_context}]
       [archive
diff --git a/stdlib/source/library/lux/tool/compiler/language/lux/phase/generation/jvm/runtime.lux b/stdlib/source/library/lux/tool/compiler/language/lux/phase/generation/jvm/runtime.lux
index fc96c025f..6031ed1db 100644
--- a/stdlib/source/library/lux/tool/compiler/language/lux/phase/generation/jvm/runtime.lux
+++ b/stdlib/source/library/lux/tool/compiler/language/lux/phase/generation/jvm/runtime.lux
@@ -21,6 +21,8 @@
      ["n" nat]
      ["[0]" i32]
      ["[0]" i64]]]
+   [meta
+    ["[0]" version]]
    [target
     ["[0]" jvm "_"
      ["_" bytecode {"+" Label Bytecode}]
@@ -48,7 +50,6 @@
      ["[1]/[0]" count]]]]
   ["//[1]" /// "_"
    [//
-    ["[0]" version]
     ["[0]" synthesis]
     ["[0]" generation]
     [///
@@ -92,7 +93,7 @@
 (def: .public (class_name [module id])
   (-> unit.ID Text)
   (format lux_context
-          "." (%.nat version.version)
+          "." (%.nat version.latest)
           "." (%.nat module)
           "." (%.nat id)))
 
diff --git a/stdlib/source/library/lux/tool/compiler/language/lux/version.lux b/stdlib/source/library/lux/tool/compiler/language/lux/version.lux
deleted file mode 100644
index cc044938c..000000000
--- a/stdlib/source/library/lux/tool/compiler/language/lux/version.lux
+++ /dev/null
@@ -1,9 +0,0 @@
-(.using
-  [library
-   [lux "*"]]
-  [////
-   [version {"+" Version}]])
-
-(def: .public version
-  Version
-  00,06,06)
diff --git a/stdlib/source/library/lux/tool/compiler/meta/cli.lux b/stdlib/source/library/lux/tool/compiler/meta/cli.lux
index 056652661..f13f1596c 100644
--- a/stdlib/source/library/lux/tool/compiler/meta/cli.lux
+++ b/stdlib/source/library/lux/tool/compiler/meta/cli.lux
@@ -18,7 +18,8 @@
    [math
     [number {"+" hex}]]
    [meta
-    ["[0]" symbol]]
+    ["[0]" symbol]
+    ["[0]" configuration {"+" Configuration}]]
    [tool
     [compiler
      [meta
@@ -52,7 +53,8 @@
     #compilers (List Compiler)
     #sources (List Source)
     #target Target
-    #module Module]))
+    #module Module
+    #configuration Configuration]))
 
 (type: .public Interpretation
   ..Compilation)
@@ -77,6 +79,7 @@
   [source_parser "--source" Source <cli>.any]
   [target_parser "--target" Target <cli>.any]
   [module_parser "--module" Module <cli>.any]
+  [configuration_parser "--configuration" Configuration (<text>.then configuration.parser <cli>.any)]
   )
 
 (def: .public service
@@ -88,7 +91,8 @@
                         (<>.some ..compiler_parser)
                         (<>.some ..source_parser)
                         ..target_parser
-                        ..module_parser))]
+                        ..module_parser
+                        ..configuration_parser))]
     ($_ <>.or
         (<>.after (<cli>.this "build")
                   compiler)
diff --git a/stdlib/source/library/lux/tool/compiler/meta/io/archive.lux b/stdlib/source/library/lux/tool/compiler/meta/io/archive.lux
index 4693a7d2f..13e848153 100644
--- a/stdlib/source/library/lux/tool/compiler/meta/io/archive.lux
+++ b/stdlib/source/library/lux/tool/compiler/meta/io/archive.lux
@@ -26,6 +26,9 @@
    [math
     [number
      ["n" nat]]]
+   [meta
+    ["[0]" configuration {"+" Configuration}]
+    ["[0]" version]]
    [world
     ["[0]" file]]]]
  ["[0]" //
@@ -46,7 +49,6 @@
    ["/[1]" // {"+" Input}
     [language
      ["$" lux
-      ["[0]" version]
       ["[0]" analysis]
       ["[0]" synthesis]
       ["[0]" generation]
@@ -145,12 +147,12 @@
       ..module_parser
       registry.parser))
 
-(def: (fresh_analysis_state host)
-  (-> Target .Lux)
-  (analysis.state (analysis.info version.version host)))
+(def: (fresh_analysis_state host configuration)
+  (-> Target Configuration .Lux)
+  (analysis.state (analysis.info version.latest host configuration)))
 
-(def: (analysis_state host archive)
-  (-> Target Archive (Try .Lux))
+(def: (analysis_state host configuration archive)
+  (-> Target Configuration Archive (Try .Lux))
   (do [! try.monad]
     [modules (: (Try (List [descriptor.Module .Module]))
                 (monad.each ! (function (_ module)
@@ -161,7 +163,7 @@
                                                (document.content $.key))]
                                   (in [module content])))
                             (archive.archived archive)))]
-    (in (with@ .#modules modules (fresh_analysis_state host)))))
+    (in (with@ .#modules modules (fresh_analysis_state host configuration)))))
 
 (def: (cached_artifacts fs context module_id)
   (-> (file.System Async) Context module.ID (Async (Try (Dictionary Text Binary))))
@@ -463,9 +465,9 @@
                                    bundles])))))]
     (in it)))
 
-(def: (load_every_reserved_module host_environment fs context import contexts archive)
+(def: (load_every_reserved_module configuration host_environment fs context import contexts archive)
   (All (_ expression directive)
-    (-> (generation.Host expression directive) (file.System Async) Context Import (List //.Context) Archive
+    (-> Configuration (generation.Host expression directive) (file.System Async) Context Import (List //.Context) Archive
         (Async (Try [Archive .Lux Bundles]))))
   (do [! (try.with async.monad)]
     [pre_loaded_caches (..pre_loaded_caches fs context import contexts archive)
@@ -482,7 +484,7 @@
                              (archive.has module entry archive))
                            archive
                            loaded_caches)
-        analysis_state (..analysis_state (value@ context.#host context) archive)]
+        analysis_state (..analysis_state (value@ context.#host context) configuration archive)]
        (in [archive
             analysis_state
             (list#mix (function (_ [_ [+analysers +synthesizers +generators +directives]]
@@ -494,9 +496,9 @@
                       ..empty_bundles
                       loaded_caches)])))))
 
-(def: .public (thaw host_environment fs context import contexts)
+(def: .public (thaw configuration host_environment fs context import contexts)
   (All (_ expression directive)
-    (-> (generation.Host expression directive) (file.System Async) Context Import (List //.Context)
+    (-> Configuration (generation.Host expression directive) (file.System Async) Context Import (List //.Context)
         (Async (Try [Archive .Lux Bundles]))))
   (do async.monad
     [binary (# fs read (..general_descriptor fs context))]
@@ -504,9 +506,9 @@
       {try.#Success binary}
       (do (try.with async.monad)
         [archive (async#in (archive.import ///.version binary))]
-        (..load_every_reserved_module host_environment fs context import contexts archive))
+        (..load_every_reserved_module configuration host_environment fs context import contexts archive))
       
       {try.#Failure error}
       (in {try.#Success [archive.empty
-                         (fresh_analysis_state (value@ context.#host context))
+                         (fresh_analysis_state (value@ context.#host context) configuration)
                          ..empty_bundles]}))))
diff --git a/stdlib/source/library/lux/tool/compiler/meta/packager/ruby.lux b/stdlib/source/library/lux/tool/compiler/meta/packager/ruby.lux
index 1bfd062fe..fb4d43410 100644
--- a/stdlib/source/library/lux/tool/compiler/meta/packager/ruby.lux
+++ b/stdlib/source/library/lux/tool/compiler/meta/packager/ruby.lux
@@ -25,9 +25,6 @@
     ["_" ruby]]
    [world
     ["[0]" file]]]]
- [program
-  [compositor
-   ["[0]" static {"+" Static}]]]
  ["[0]" // {"+" Packager}
   [//
    ["[0]" archive {"+" Output}
diff --git a/stdlib/source/program/aedifex/command/build.lux b/stdlib/source/program/aedifex/command/build.lux
index 8570207be..599887fe4 100644
--- a/stdlib/source/program/aedifex/command/build.lux
+++ b/stdlib/source/program/aedifex/command/build.lux
@@ -6,7 +6,7 @@
     [order {"+" Order}]
     [monad {"+" do}]]
    [control
-    ["[0]" try {"+" Try}]
+    ["[0]" try {"+" Try} ("[1]#[0]" functor)]
     ["[0]" exception {"+" exception:}]
     ["[0]" io {"+" IO}]
     [concurrency
@@ -23,10 +23,13 @@
     [number {"+" hex}
      ["n" nat]
      ["i" int]]]
+   [meta
+    ["[0]" configuration]]
    [tool
     [compiler
      [meta
-      ["[0]" cli]
+      [cli
+       ["[0]" compiler]]
       ["[0]" packager
        ["[0]_[1]" ruby]]]]]
    [world
@@ -238,8 +241,9 @@
 
 (def: windows?
   Bit
-  (|> (java/lang/System::getProperty "os.name")
+  (|> (java/lang/System::getProperty (ffi.as_string "os.name"))
       io.run!
+      (try#each (|>> ffi.of_string))
       (try.else "")
       text.lower_cased
       (text.starts_with? "windows")))
@@ -306,10 +310,11 @@
                                                         (list "build")
                                                         (..plural "--library" (..libraries fs home resolution))
                                                         (..plural "--host_dependency" host_dependencies)
-                                                        (..plural "--compiler" (list#each cli.compiler_format (value@ ///.#compilers profile)))
+                                                        (..plural "--compiler" (list#each compiler.format (value@ ///.#compilers profile)))
                                                         (..plural "--source" (set.list (value@ ///.#sources profile)))
                                                         (..singular "--target" cache_directory)
-                                                        (..singular "--module" program_module)))]
+                                                        (..singular "--module" program_module)
+                                                        (..singular "--configuration" (configuration.format (value@ ///.#configuration profile)))))]
              process (# shell execute [environment
                                        working_directory
                                        command
diff --git a/stdlib/source/program/aedifex/command/deploy.lux b/stdlib/source/program/aedifex/command/deploy.lux
index f80ed0275..3ceefa7c1 100644
--- a/stdlib/source/program/aedifex/command/deploy.lux
+++ b/stdlib/source/program/aedifex/command/deploy.lux
@@ -1,57 +1,58 @@
 (.using
-  [library
-   [lux "*"
-    [abstract
-     [monad {"+" do}]]
-    [control
-     [pipe {"+" do>}]
-     ["[0]" try {"+" Try}]
-     [concurrency
-      ["[0]" async {"+" Async} ("[1]#[0]" monad)]]
-     ["<>" parser
-      ["<[0]>" xml]]]
-    [data
-     [binary {"+" Binary}]
-     [text
-      ["%" format {"+" format}]
-      [encoding
-       ["[0]" utf8]]]
-     [collection
-      ["[0]" set]]
-     [format
-      ["[0]" binary]
-      ["[0]" tar]
-      ["[0]" xml]]]
-    [time
-     ["[0]" instant {"+" Instant}]]
-    [world
-     ["[0]" file]
-     ["[0]" console {"+" Console}]]]]
-  [program
-   [compositor
-    ["[0]" export]]]
-  ["[0]" // "_"
-   ["[1][0]" clean]
-   ["/[1]" // "_"
-    [command {"+" Command}]
-    ["/" profile]
-    ["[1][0]" action {"+" Action}]
-    ["[1][0]" pom]
-    ["[1][0]" hash]
-    ["[1][0]" package]
-    ["[1][0]" dependency
-     ["[1]/[0]" deployment]
-     ["[1]/[0]" status {"+" Status}]]
-    ["[1][0]" repository {"+" Repository}
-     [identity {"+" Identity}]
-     ["[1]/[0]" remote]
-     ["[1]/[0]" origin]]
-    ["[1][0]" metadata
-     ["[1]/[0]" artifact]
-     ["[1]/[0]" snapshot]]
-    ["[1][0]" artifact {"+" Artifact}
-     ["[1]/[0]" extension {"+" Extension}]
-     ["[1]/[0]" type]]]])
+ [library
+  [lux "*"
+   [abstract
+    [monad {"+" do}]]
+   [control
+    [pipe {"+" do>}]
+    ["[0]" try {"+" Try}]
+    [concurrency
+     ["[0]" async {"+" Async} ("[1]#[0]" monad)]]
+    ["<>" parser
+     ["<[0]>" xml]]]
+   [data
+    [binary {"+" Binary}]
+    [text
+     ["%" format {"+" format}]
+     [encoding
+      ["[0]" utf8]]]
+    [collection
+     ["[0]" set]]
+    [format
+     ["[0]" binary]
+     ["[0]" tar]
+     ["[0]" xml]]]
+   [time
+    ["[0]" instant {"+" Instant}]]
+   [tool
+    [compiler
+     [meta
+      ["[0]" export]]]]
+   [world
+    ["[0]" file]
+    ["[0]" console {"+" Console}]]]]
+ ["[0]" // "_"
+  ["[1][0]" clean]
+  ["/[1]" // "_"
+   [command {"+" Command}]
+   ["/" profile]
+   ["[1][0]" action {"+" Action}]
+   ["[1][0]" pom]
+   ["[1][0]" hash]
+   ["[1][0]" package]
+   ["[1][0]" dependency
+    ["[1]/[0]" deployment]
+    ["[1]/[0]" status {"+" Status}]]
+   ["[1][0]" repository {"+" Repository}
+    [identity {"+" Identity}]
+    ["[1]/[0]" remote]
+    ["[1]/[0]" origin]]
+   ["[1][0]" metadata
+    ["[1]/[0]" artifact]
+    ["[1]/[0]" snapshot]]
+   ["[1][0]" artifact {"+" Artifact}
+    ["[1]/[0]" extension {"+" Extension}]
+    ["[1]/[0]" type]]]])
 
 (def: .public success
   "Successfully deployed the project.")
diff --git a/stdlib/source/program/aedifex/command/install.lux b/stdlib/source/program/aedifex/command/install.lux
index 06f3197f8..a1553e4bd 100644
--- a/stdlib/source/program/aedifex/command/install.lux
+++ b/stdlib/source/program/aedifex/command/install.lux
@@ -1,47 +1,48 @@
 (.using
-  [library
-   [lux "*"
-    [abstract
-     [monad {"+" do}]]
-    [control
-     ["[0]" try {"+" Try}]
-     ["[0]" exception]
-     [concurrency
-      ["[0]" async {"+" Async}]]]
-    [data
-     [binary {"+" Binary}]
-     [text
-      [encoding
-       ["[0]" utf8]]]
-     [collection
-      ["[0]" set]]
-     [format
-      ["[0]" binary]
-      ["[0]" tar]
-      ["[0]" xml]]]
-    [world
-     [program {"+" Program}]
-     ["[0]" file]
-     ["[0]" console {"+" Console}]]]]
-  [program
-   [compositor
-    ["[0]" export]]]
-  ["[0]" // "_"
-   ["[1][0]" clean]
-   ["/[1]" // "_"
-    ["/" profile {"+" Profile}]
-    ["[1][0]" action {"+" Action}]
-    ["[1][0]" command {"+" Command}]
-    ["[1][0]" local]
-    ["[1][0]" pom]
-    ["[1][0]" package]
-    [repository {"+" Repository}
-     ["[1][0]" origin]]
-    ["[1][0]" dependency "_"
-     ["[1]/[0]" deployment]
-     ["[1]/[0]" status]]
-    ["[1][0]" artifact {"+" Artifact}
-     ["[1]/[0]" type]]]])
+ [library
+  [lux "*"
+   [abstract
+    [monad {"+" do}]]
+   [control
+    ["[0]" try {"+" Try}]
+    ["[0]" exception]
+    [concurrency
+     ["[0]" async {"+" Async}]]]
+   [data
+    [binary {"+" Binary}]
+    [text
+     [encoding
+      ["[0]" utf8]]]
+    [collection
+     ["[0]" set]]
+    [format
+     ["[0]" binary]
+     ["[0]" tar]
+     ["[0]" xml]]]
+   [tool
+    [compiler
+     [meta
+      ["[0]" export]]]]
+   [world
+    [program {"+" Program}]
+    ["[0]" file]
+    ["[0]" console {"+" Console}]]]]
+ ["[0]" // "_"
+  ["[1][0]" clean]
+  ["/[1]" // "_"
+   ["/" profile {"+" Profile}]
+   ["[1][0]" action {"+" Action}]
+   ["[1][0]" command {"+" Command}]
+   ["[1][0]" local]
+   ["[1][0]" pom]
+   ["[1][0]" package]
+   [repository {"+" Repository}
+    ["[1][0]" origin]]
+   ["[1][0]" dependency "_"
+    ["[1]/[0]" deployment]
+    ["[1]/[0]" status]]
+   ["[1][0]" artifact {"+" Artifact}
+    ["[1]/[0]" type]]]])
 
 (def: .public success
   "Successfully installed the project locally.")
diff --git a/stdlib/source/program/aedifex/command/version.lux b/stdlib/source/program/aedifex/command/version.lux
index 2a9072c39..c61e796df 100644
--- a/stdlib/source/program/aedifex/command/version.lux
+++ b/stdlib/source/program/aedifex/command/version.lux
@@ -1,21 +1,20 @@
 (.using
-  [library
-   [lux "*"
-    [control
-     [concurrency
-      ["[0]" async {"+" Async}]]]
-    [tool
-     [compiler
-      ["[0]" version]
-      ["[0]" language "_"
-       ["[1]/[0]" lux "_"
-        ["[1]" version]]]]]
-    [world
-     ["[0]" console {"+" Console}]]]]
-  [///
-   [command {"+" Command}]])
+ [library
+  [lux "*"
+   [control
+    [concurrency
+     ["[0]" async {"+" Async}]]]
+   ["[0]" meta "_"
+    ["[1]/[0]" version]]
+   [tool
+    [compiler
+     ["[0]" version]]]
+   [world
+    ["[0]" console {"+" Console}]]]]
+ [///
+  [command {"+" Command}]])
 
 (def: .public (do! console profile)
   (-> (Console Async) (Command Any))
-  (console.write_line (version.format language/lux.version)
+  (console.write_line (version.format meta/version.latest)
                       console))
diff --git a/stdlib/source/program/aedifex/dependency/resolution.lux b/stdlib/source/program/aedifex/dependency/resolution.lux
index ffea5d458..627a3e6ef 100644
--- a/stdlib/source/program/aedifex/dependency/resolution.lux
+++ b/stdlib/source/program/aedifex/dependency/resolution.lux
@@ -86,10 +86,7 @@
     (case ?actual
       {try.#Success actual}
       (in (do [! try.monad]
-            [output (# ! each (for [@.old (|>> (:as java/lang/String)
-                                               java/lang/String::trim
-                                               (:as Text))
-                                    @.jvm (|>> java/lang/String::trim)])
+            [output (# ! each (|>> ffi.as_string java/lang/String::trim ffi.of_string)
                        (# utf8.codec decoded actual))
              actual (|> output
                         (text.all_split_by " ")
diff --git a/stdlib/source/program/aedifex/format.lux b/stdlib/source/program/aedifex/format.lux
index 54e1ed57f..d0628f160 100644
--- a/stdlib/source/program/aedifex/format.lux
+++ b/stdlib/source/program/aedifex/format.lux
@@ -13,7 +13,8 @@
    [tool
     [compiler
      [meta
-      [cli {"+" Compiler}]]]]]]
+      [cli
+       [compiler {"+" Compiler}]]]]]]]
  ["[0]" // "_"
   ["/" profile]
   ["[1][0]" runtime {"+" Runtime}]
diff --git a/stdlib/source/program/aedifex/hash.lux b/stdlib/source/program/aedifex/hash.lux
index 093f5fbe4..30b0cdcee 100644
--- a/stdlib/source/program/aedifex/hash.lux
+++ b/stdlib/source/program/aedifex/hash.lux
@@ -1,25 +1,25 @@
 (.using
-  [library
-   [lux "*"
-    ["[0]" ffi {"+" import:}]
-    [abstract
-     [codec {"+" Codec}]
-     [equivalence {"+" Equivalence}]
-     [monad {"+" do}]]
-    [control
-     ["[0]" try {"+" Try}]
-     ["[0]" exception {"+" exception:}]]
-    [data
-     ["[0]" binary {"+" Binary}]
-     ["[0]" text
-      ["%" format {"+" Format format}]
-      ["[0]" encoding]]]
-    [math
-     [number
-      ["n" nat]
-      ["[0]" i64]]]
-    [type
-     abstract]]])
+ [library
+  [lux "*"
+   ["[0]" ffi {"+" import:}]
+   [abstract
+    [codec {"+" Codec}]
+    [equivalence {"+" Equivalence}]
+    [monad {"+" do}]]
+   [control
+    ["[0]" try {"+" Try}]
+    ["[0]" exception {"+" exception:}]]
+   [data
+    ["[0]" binary {"+" Binary}]
+    ["[0]" text
+     ["%" format {"+" Format format}]
+     ["[0]" encoding]]]
+   [math
+    [number
+     ["n" nat]
+     ["[0]" i64]]]
+   [type
+    abstract]]])
 
 ... TODO: Replace with pure-Lux implementations of these algorithms
 ... https://en.wikipedia.org/wiki/SHA-1#SHA-1_pseudocode
@@ -44,7 +44,7 @@
   (template [<name> <kind> <algorithm>]
     [(def: .public (<name> value)
        (-> Binary (Hash <kind>))
-       (|> (java/security/MessageDigest::getInstance [<algorithm>])
+       (|> (java/security/MessageDigest::getInstance [(ffi.as_string <algorithm>)])
            (java/security/MessageDigest::digest [value])
            :abstraction))]
 
diff --git a/stdlib/source/program/aedifex/parser.lux b/stdlib/source/program/aedifex/parser.lux
index 52a9a292c..097373529 100644
--- a/stdlib/source/program/aedifex/parser.lux
+++ b/stdlib/source/program/aedifex/parser.lux
@@ -9,12 +9,14 @@
    [data
     ["[0]" text]
     [collection
-     ["[0]" dictionary {"+" Dictionary}]
-     ["[0]" set {"+" Set}]]]
+     ["[0]" set {"+" Set}]
+     ["[0]" dictionary {"+" Dictionary}
+      ["[0]" plist {"+" PList}]]]]
    [tool
     [compiler
      [meta
-      [cli {"+" Compiler}]
+      [cli
+       [compiler {"+" Compiler}]]
       [archive
        [module
         [descriptor {"+" Module}]]]]]]
@@ -179,10 +181,14 @@
   <code>.text)
 
 (def: deploy_repository
-  (Parser (List [Text //repository.Address]))
-  (<code>.tuple (<>.some
-                 (<>.and <code>.text
-                         ..repository))))
+  (Parser [Text //repository.Address])
+  (<>.and <code>.text
+          ..repository))
+
+(def: configuration/1
+  (Parser [Text Text])
+  (<>.and <code>.text
+          <code>.text))
 
 (def: runtime
   (Parser Runtime)
@@ -237,7 +243,10 @@
            ^deploy_repositories (: (Parser (Dictionary Text //repository.Address))
                                    (<| (# ! each (dictionary.of_list text.hash))
                                        (<>.else (list))
-                                       (..singular input "deploy_repositories" ..deploy_repository)))
+                                       (..plural input "deploy_repositories" ..deploy_repository)))
+           ^configuration (: (Parser (PList Text))
+                             (<| (<>.else (list))
+                                 (..plural input "configuration" ..configuration/1)))
            ^java (|> ..runtime
                      (..singular input "java")
                      (<>.else //runtime.default_java))
@@ -266,6 +275,7 @@
         ^program
         ^test
         ^deploy_repositories
+        ^configuration
         ^java
         ^js
         ^python
diff --git a/stdlib/source/program/aedifex/profile.lux b/stdlib/source/program/aedifex/profile.lux
index eeabf5f82..43887caa4 100644
--- a/stdlib/source/program/aedifex/profile.lux
+++ b/stdlib/source/program/aedifex/profile.lux
@@ -11,9 +11,10 @@
     ["[0]" product]
     ["[0]" text ("[1]#[0]" equivalence)]
     [collection
-     ["[0]" dictionary {"+" Dictionary}]
      ["[0]" list ("[1]#[0]" monoid)]
-     ["[0]" set {"+" Set}]]]
+     ["[0]" set {"+" Set}]
+     ["[0]" dictionary {"+" Dictionary}
+      ["[0]" plist {"+" PList} ("[1]#[0]" monoid)]]]]
    [macro
     ["[0]" template]]
    [meta
@@ -24,7 +25,8 @@
    [tool
     [compiler
      [meta
-      ["[0]" cli {"+" Compiler}]
+      ["[0]" cli
+       ["[0]" compiler {"+" Compiler}]]
       [archive
        [module
         [descriptor {"+" Module}]]]]]]]]
@@ -173,6 +175,7 @@
     #program (Maybe Module)
     #test (Maybe Module)
     #deploy_repositories (Dictionary Text Address)
+    #configuration (PList Text)
     #java Runtime
     #js Runtime
     #python Runtime
@@ -195,7 +198,7 @@
       ... #lux
       dependency.equivalence
       ... #compilers
-      (list.equivalence cli.compiler_equivalence)
+      (list.equivalence compiler.equivalence)
       ... #sources
       set.equivalence
       ... #target
@@ -206,6 +209,8 @@
       (maybe.equivalence text.equivalence)
       ... #deploy_repositories
       (dictionary.equivalence text.equivalence)
+      ... #configuration
+      (plist.equivalence text.equivalence)
       ... #java
       runtime.equivalence
       ... #js
@@ -233,6 +238,7 @@
      #program {.#None}
      #test {.#None}
      #deploy_repositories (dictionary.empty text.hash)
+     #configuration plist.empty
      #java runtime.default_java
      #js runtime.default_js
      #python runtime.default_python
@@ -260,6 +266,7 @@
        #program (maybe#composite (value@ #program override) (value@ #program baseline))
        #test (maybe#composite (value@ #test override) (value@ #test baseline))
        #deploy_repositories (dictionary.merged (value@ #deploy_repositories override) (value@ #deploy_repositories baseline))
+       #configuration (plist#composite (value@ #configuration override) (value@ #configuration baseline))
        #java (!runtime #java runtime.default_java)
        #js (!runtime #js runtime.default_js)
        #python (!runtime #python runtime.default_python)
diff --git a/stdlib/source/program/aedifex/repository/identity.lux b/stdlib/source/program/aedifex/repository/identity.lux
index 6e058850d..8288f2d74 100644
--- a/stdlib/source/program/aedifex/repository/identity.lux
+++ b/stdlib/source/program/aedifex/repository/identity.lux
@@ -1,15 +1,15 @@
 (.using
-  [library
-   [lux "*"
-    ["[0]" ffi {"+" import:}]
-    [abstract
-     [equivalence {"+" Equivalence}]]
-    [data
-     ["[0]" product]
-     ["[0]" text
-      ["%" format {"+" format}]
-      [encoding
-       ["[0]" utf8]]]]]])
+ [library
+  [lux "*"
+   ["[0]" ffi {"+" import:}]
+   [abstract
+    [equivalence {"+" Equivalence}]]
+   [data
+    ["[0]" product]
+    ["[0]" text
+     ["%" format {"+" format}]
+     [encoding
+      ["[0]" utf8]]]]]])
 
 (type: .public User
   Text)
@@ -42,4 +42,5 @@
   (let [credentials (# utf8.codec encoded (format user ":" password))]
     (|> (java/util/Base64::getEncoder)
         (java/util/Base64$Encoder::encodeToString credentials)
+        ffi.of_string
         (format "Basic "))))
diff --git a/stdlib/source/program/aedifex/repository/remote.lux b/stdlib/source/program/aedifex/repository/remote.lux
index 9e50e71a6..7f1a735b8 100644
--- a/stdlib/source/program/aedifex/repository/remote.lux
+++ b/stdlib/source/program/aedifex/repository/remote.lux
@@ -1,34 +1,33 @@
 (.using
-  [library
-   [lux "*"
-    [abstract
-     [monad {"+" do}]]
-    [control
-     ["[0]" io {"+" IO}]
-     ["[0]" try {"+" Try}]
-     ["[0]" exception {"+" exception:}]]
-    [data
-     ["[0]" product]
-     [text
-      ["%" format {"+" format}]]]
-    [tool
-     [compiler
-      ["[0]" version]
-      ["[0]" language "_"
-       ["[1]/[0]" lux "_"
-        ["[1]" version]]]]]
-    [world
-     [net {"+" URL}
-      [uri {"+" URI}]
-      ["[0]" http "_"
-       ["[1]" client]
-       ["[1]/[0]" status]
-       ["@[1]" /]]]]]]
-  ["[0]" //
-   ["[1][0]" identity {"+" Identity}]
-   ["/[1]" // "_"
-    ["[1][0]" artifact {"+" Version Artifact}
-     [extension {"+" Extension}]]]])
+ [library
+  [lux "*"
+   [abstract
+    [monad {"+" do}]]
+   [control
+    ["[0]" io {"+" IO}]
+    ["[0]" try {"+" Try}]
+    ["[0]" exception {"+" exception:}]]
+   [data
+    ["[0]" product]
+    [text
+     ["%" format {"+" format}]]]
+   ["[0]" meta "_"
+    ["[1]/[0]" version]]
+   [tool
+    [compiler
+     ["[0]" version]]]
+   [world
+    [net {"+" URL}
+     [uri {"+" URI}]
+     ["[0]" http "_"
+      ["[1]" client]
+      ["[1]/[0]" status]
+      ["@[1]" /]]]]]]
+ ["[0]" //
+  ["[1][0]" identity {"+" Identity}]
+  ["/[1]" // "_"
+   ["[1][0]" artifact {"+" Version Artifact}
+    [extension {"+" Extension}]]]])
 
 (type: .public Address
   URL)
@@ -49,7 +48,7 @@
   (format (///artifact.uri version_template artifact) extension))
 
 (def: .public user_agent
-  (format "LuxAedifex/" (version.format language/lux.version)))
+  (format "LuxAedifex/" (version.format meta/version.latest)))
 
 (def: base_headers
   (List [Text Text])
diff --git a/stdlib/source/program/compositor.lux b/stdlib/source/program/compositor.lux
index 7df24358b..250f184bd 100644
--- a/stdlib/source/program/compositor.lux
+++ b/stdlib/source/program/compositor.lux
@@ -152,7 +152,7 @@
         (<| (or_crash! "Compilation failed:")
             ..timed
             (do (try.with async.monad)
-              [.let [[compilation_host_dependencies compilation_libraries compilation_compilers compilation_sources compilation_target compilation_module] compilation]
+              [.let [[compilation_host_dependencies compilation_libraries compilation_compilers compilation_sources compilation_target compilation_module compilation_configuration] compilation]
                import (import.import (value@ platform.#&file_system platform) compilation_libraries)
                [state archive phase_wrapper] (:sharing [<parameters>]
                                                        (Platform <parameters>)
@@ -162,7 +162,7 @@
                                                                     Archive
                                                                     phase.Wrapper]))
                                                        (:expected (platform.initialize file_context compilation_module expander host_analysis platform generation_bundle host_directive_bundle program anchorT,expressionT,directiveT extender
-                                                                                       import compilation_sources)))
+                                                                                       import compilation_sources compilation_configuration)))
                [archive state] (:sharing [<parameters>]
                                          (Platform <parameters>)
                                          platform
diff --git a/stdlib/source/test/lux/macro.lux b/stdlib/source/test/lux/macro.lux
index ef7463d4e..f2e29ec1a 100644
--- a/stdlib/source/test/lux/macro.lux
+++ b/stdlib/source/test/lux/macro.lux
@@ -66,9 +66,10 @@
            current_module (symbol.module (symbol .._))]]
     (in [seed
          symbol_prefix
-         [.#info            [.#target  ""
+         [.#info            [.#target ""
                              .#version ""
-                             .#mode    {.#Build}]
+                             .#mode {.#Build}
+                             .#configuration (list)]
           .#source          [location.dummy 0 ""]
           .#location         location.dummy
           .#current_module  {.#Some current_module}
diff --git a/stdlib/source/test/lux/macro/syntax/definition.lux b/stdlib/source/test/lux/macro/syntax/definition.lux
index 82fc97e3e..faf667534 100644
--- a/stdlib/source/test/lux/macro/syntax/definition.lux
+++ b/stdlib/source/test/lux/macro/syntax/definition.lux
@@ -34,9 +34,10 @@
       ))
 
 (def: compiler
-  [.#info            [.#target  "FAKE"
+  [.#info            [.#target "FAKE"
                       .#version "0.0.0"
-                      .#mode    {.#Build}]
+                      .#mode {.#Build}
+                      .#configuration (list)]
    .#source          [location.dummy 0 ""]
    .#location        location.dummy
    .#current_module  {.#None}
diff --git a/stdlib/source/test/lux/meta.lux b/stdlib/source/test/lux/meta.lux
index 914e02d92..871cc155c 100644
--- a/stdlib/source/test/lux/meta.lux
+++ b/stdlib/source/test/lux/meta.lux
@@ -32,7 +32,9 @@
   ["[0]" /]]
  ["[0]" / "_"
   ["[1][0]" location]
-  ["[1][0]" symbol]])
+  ["[1][0]" symbol]
+  ["[1][0]" configuration]
+  ["[1][0]" version]])
 
 (template: (!expect <pattern> <value>)
   [(case <value>
@@ -50,9 +52,10 @@
      expected_seed random.nat
      expected random.nat
      dummy (random.only (|>> (n.= expected) not) random.nat)
-     .let [expected_lux [.#info            [.#target  target
+     .let [expected_lux [.#info            [.#target target
                                             .#version version
-                                            .#mode    {.#Build}]
+                                            .#mode {.#Build}
+                                            .#configuration (list)]
                          .#source          [location.dummy 0 source_code]
                          .#location         location.dummy
                          .#current_module  {.#Some expected_current_module}
@@ -98,9 +101,10 @@
      expected random.nat
      dummy (random.only (|>> (n.= expected) not) random.nat)
      expected_error (random.ascii/upper 1)
-     .let [expected_lux [.#info            [.#target  target
+     .let [expected_lux [.#info            [.#target target
                                             .#version version
-                                            .#mode    {.#Build}]
+                                            .#mode {.#Build}
+                                            .#configuration (list)]
                          .#source          [location.dummy 0 source_code]
                          .#location         location.dummy
                          .#current_module  {.#Some expected_current_module}
@@ -203,9 +207,10 @@
                                    expected_module]
                                   [imported_module_name
                                    imported_module])
-           expected_lux [.#info            [.#target  target
+           expected_lux [.#info            [.#target target
                                             .#version version
-                                            .#mode    {.#Build}]
+                                            .#mode {.#Build}
+                                            .#configuration (list)]
                          .#source          [location.dummy 0 source_code]
                          .#location         location.dummy
                          .#current_module  {.#Some expected_current_module}
@@ -304,9 +309,10 @@
      .let [type_context [.#ex_counter 0
                          .#var_counter 0
                          .#var_bindings (list)]
-           expected_lux [.#info            [.#target  target
+           expected_lux [.#info            [.#target target
                                             .#version version
-                                            .#mode    {.#Build}]
+                                            .#mode {.#Build}
+                                            .#configuration (list)]
                          .#source          [location.dummy 0 source_code]
                          .#location         expected_location
                          .#current_module  {.#Some expected_current_module}
@@ -382,9 +388,10 @@
                                          (list)))]
                   [current_globals
                    macro_globals
-                   [.#info            [.#target  ""
+                   [.#info            [.#target ""
                                        .#version ""
-                                       .#mode    {.#Build}]
+                                       .#mode {.#Build}
+                                       .#configuration (list)]
                     .#source          [location.dummy 0 ""]
                     .#location         location.dummy
                     .#current_module  {.#Some expected_current_module}
@@ -497,9 +504,10 @@
                                          (list)))]
                   [current_globals
                    macro_globals
-                   [.#info            [.#target  ""
+                   [.#info            [.#target ""
                                        .#version ""
-                                       .#mode    {.#Build}]
+                                       .#mode {.#Build}
+                                       .#configuration (list)]
                     .#source          [location.dummy 0 ""]
                     .#location         location.dummy
                     .#current_module  {.#Some expected_current_module}
@@ -670,9 +678,10 @@
            
            expected_lux
            (: Lux
-              [.#info            [.#target  ""
+              [.#info            [.#target ""
                                   .#version ""
-                                  .#mode    {.#Build}]
+                                  .#mode {.#Build}
+                                  .#configuration (list)]
                .#source          [location.dummy 0 ""]
                .#location        location.dummy
                .#current_module  {.#Some current_module}
@@ -821,9 +830,10 @@
                                      .#mappings (list)]])]
      .let [expected_lux
            (: Lux
-              [.#info            [.#target  ""
+              [.#info            [.#target ""
                                   .#version ""
-                                  .#mode    {.#Build}]
+                                  .#mode {.#Build}
+                                  .#configuration (list)]
                .#source          [location.dummy 0 ""]
                .#location        location.dummy
                .#current_module  {.#Some current_module}
@@ -933,9 +943,10 @@
              expected random.nat
              dummy (random.only (|>> (n.= expected) not) random.nat)
              expected_location ..random_location
-             .let [expected_lux [.#info            [.#target  target
+             .let [expected_lux [.#info            [.#target target
                                                     .#version version
-                                                    .#mode    {.#Build}]
+                                                    .#mode {.#Build}
+                                                    .#configuration (list)]
                                  .#source          [expected_location 0 source_code]
                                  .#location         expected_location
                                  .#current_module  {.#Some expected_current_module}
@@ -991,4 +1002,6 @@
           
           /location.test
           /symbol.test
+          /configuration.test
+          /version.test
           )))
diff --git a/stdlib/source/test/lux/meta/configuration.lux b/stdlib/source/test/lux/meta/configuration.lux
new file mode 100644
index 000000000..9776472d5
--- /dev/null
+++ b/stdlib/source/test/lux/meta/configuration.lux
@@ -0,0 +1,90 @@
+(.using
+ [library
+  [lux "*"
+   ["_" test {"+" Test}]
+   ["[0]" meta]
+   [abstract
+    [monad {"+" do}]
+    [\\specification
+     ["$[0]" equivalence]
+     ["$[0]" monoid]]]
+   [control
+    ["[0]" try ("[1]#[0]" functor)]
+    ["[0]" exception]
+    ["<>" parser
+     ["<[0]>" text]
+     ["<[0]>" code]]]
+   [data
+    ["[0]" text]
+    [collection
+     ["[0]" list]]]
+   ["[0]" macro
+    [syntax {"+" syntax:}]
+    ["[0]" code]]
+   [math
+    ["[0]" random {"+" Random} ("[1]#[0]" monad)]]]]
+ [\\library
+  ["[0]" /]])
+
+(def: .public (random amount)
+  (-> Nat (Random /.Configuration))
+  (case amount
+    0 (random#in /.empty)
+    _ (do [! random.monad]
+        [feature (random.ascii/upper amount)
+         value (random.ascii/lower amount)]
+        (# ! each (|>> (list& [feature value]))
+           (random (-- amount))))))
+
+(syntax: (failure [it <code>.any])
+  (function (_ lux)
+    (case (macro.expansion it lux)
+      {try.#Failure error}
+      {try.#Success [lux (list (code.text error))]}
+      
+      {try.#Success _}
+      {try.#Failure ""})))
+
+(def: .public test
+  Test
+  (<| (_.covering /._)
+      (_.for [/.Configuration])
+      (do [! random.monad]
+        [expected (..random 5)]
+        ($_ _.and
+            (_.for [/.equivalence]
+                   ($equivalence.spec /.equivalence (..random 5)))
+            (_.for [/.monoid]
+                   ($monoid.spec /.equivalence /.monoid (..random 5)))
+
+            (_.cover [/.empty]
+                     (list.empty? /.empty))
+            (_.cover [/.format /.parser]
+                     (|> expected
+                         /.format
+                         (<text>.result /.parser)
+                         (try#each (# /.equivalence = expected))
+                         (try.else false)))
+            (_.cover [/.for]
+                     (and (and (/.for [["left" "<<<"
+                                        "right" ">>>"]
+                                       true]
+                                      false)
+                               (/.for [["left" "<<<"]
+                                       true]
+                                      false)
+                               (/.for [["right" ">>>"]
+                                       true]
+                                      false))
+                          (and (/.for [["yolo" ""]
+                                       false]
+                                      true)
+                               (/.for [["left" "yolo"]
+                                       false]
+                                      true))))
+            (_.cover [/.invalid]
+                     (and (text.contains? (value@ exception.#label /.invalid)
+                                          (..failure (/.for [])))
+                          (text.contains? (value@ exception.#label /.invalid)
+                                          (..failure (/.for [["left" "yolo"] false])))))
+            ))))
diff --git a/stdlib/source/test/lux/meta/version.lux b/stdlib/source/test/lux/meta/version.lux
new file mode 100644
index 000000000..a279158ab
--- /dev/null
+++ b/stdlib/source/test/lux/meta/version.lux
@@ -0,0 +1,55 @@
+(.using
+ [library
+  [lux "*"
+   ["_" test {"+" Test}]
+   ["[0]" static]
+   ["[0]" meta]
+   [abstract
+    [monad {"+" do}]]
+   [control
+    ["[0]" try]
+    ["[0]" exception]
+    [parser
+     ["<[0]>" code]]]
+   [data
+    ["[0]" text]]
+   ["[0]" macro
+    [syntax {"+" syntax:}]
+    ["[0]" code]]
+   [math
+    ["[0]" random]
+    [number
+     ["n" nat]]]]]
+ [\\library
+  ["[0]" /]])
+
+(syntax: (failure [it <code>.any])
+  (function (_ lux)
+    (case (macro.expansion it lux)
+      {try.#Failure error}
+      {try.#Success [lux (list (code.text error))]}
+      
+      {try.#Success _}
+      {try.#Failure ""})))
+
+(def: .public test
+  Test
+  (<| (_.covering /._)
+      (with_expansions [<current> (/.current)
+                        <fake> (static.random code.text (random.ascii/lower 1))])
+      ($_ _.and
+          (_.cover [/.latest]
+                   (n.> 0 /.latest))
+          (_.cover [/.current]
+                   (not (text.empty? (/.current))))
+          (_.cover [/.for]
+                   (and (/.for [<current> true]
+                               false)
+                        (/.for [<fake> false]
+                               true)))
+          (_.cover [/.invalid]
+                   (and (text.contains? (value@ exception.#label /.invalid)
+                                        (..failure (/.for [])))
+                        (text.contains? (value@ exception.#label /.invalid)
+                                        (..failure (/.for [<fake> false])))))
+          )))
diff --git a/stdlib/source/test/lux/tool/compiler/language/lux/analysis.lux b/stdlib/source/test/lux/tool/compiler/language/lux/analysis.lux
index 75f0d5d1c..ee058760a 100644
--- a/stdlib/source/test/lux/tool/compiler/language/lux/analysis.lux
+++ b/stdlib/source/test/lux/tool/compiler/language/lux/analysis.lux
@@ -23,7 +23,10 @@
    [math
     ["[0]" random {"+" Random} ("[1]#[0]" monad)]
     [number
-     ["f" frac]]]]]
+     ["f" frac]]]
+   [meta
+    ["[0]" configuration "_"
+     ["$[1]" \\test]]]]]
  ["[0]" / "_"
   ["[1][0]" complex]
   ["[1][0]" inference]
@@ -249,10 +252,11 @@
        expected_error (random.ascii/lower 10)
        location/0 /location.random
        location/1 /location.random
+       configuration ($configuration.random 5)
        .let [state/0 (with@ .#location location/0
-                            (/.state (/.info version/0 host/0)))
+                            (/.state (/.info version/0 host/0 configuration)))
              state/1 (with@ .#location location/1
-                            (/.state (/.info version/1 host/1)))]]
+                            (/.state (/.info version/1 host/1 configuration)))]]
       ($_ _.and
           (_.cover [/.set_state]
                    (|> (do phase.monad
@@ -330,18 +334,20 @@
      expected_file (random.ascii/lower 12)
      expected_code (random.ascii/lower 13)
 
+     configuration ($configuration.random 5)
      .let [state (with@ .#location location
-                        (/.state (/.info version host)))]]
+                        (/.state (/.info version host configuration)))]]
     ($_ _.and
         (_.cover [/.info]
-                 (let [it (/.info version host)]
+                 (let [it (/.info version host configuration)]
                    (and (text#= (version.format version)
                                 (value@ .#version it))
                         (same? host
                                (value@ .#target it))
-                        (..tagged? .#Build (value@ .#mode it)))))
+                        (..tagged? .#Build (value@ .#mode it))
+                        (same? configuration (value@ .#configuration it)))))
         (_.cover [/.state]
-                 (let [info (/.info version host)
+                 (let [info (/.info version host configuration)
                        it (/.state info)]
                    (and (same? info
                                (value@ .#info it))
diff --git a/stdlib/source/test/lux/tool/compiler/language/lux/analysis/inference.lux b/stdlib/source/test/lux/tool/compiler/language/lux/analysis/inference.lux
index 3eec3a5b4..63038413d 100644
--- a/stdlib/source/test/lux/tool/compiler/language/lux/analysis/inference.lux
+++ b/stdlib/source/test/lux/tool/compiler/language/lux/analysis/inference.lux
@@ -22,6 +22,8 @@
      ["n" nat]]]
    [meta
     ["[0]" symbol "_"
+     ["$[1]" \\test]]
+    ["[0]" configuration "_"
      ["$[1]" \\test]]]
    ["[0]" type ("[1]#[0]" equivalence)
     ["[0]" check {"+" Check}]]]]
@@ -56,8 +58,9 @@
   (Random Lux)
   (do random.monad
     [version random.nat
-     host (random.ascii/lower 1)]
-    (in (//.state (//.info version host)))))
+     host (random.ascii/lower 1)
+     configuration ($configuration.random 5)]
+    (in (//.state (//.info version host configuration)))))
 
 (def: primitive
   (Random Type)
diff --git a/stdlib/source/test/lux/tool/compiler/language/lux/analysis/macro.lux b/stdlib/source/test/lux/tool/compiler/language/lux/analysis/macro.lux
index b976dab87..d3f1ff62d 100644
--- a/stdlib/source/test/lux/tool/compiler/language/lux/analysis/macro.lux
+++ b/stdlib/source/test/lux/tool/compiler/language/lux/analysis/macro.lux
@@ -2,7 +2,6 @@
  [library
   [lux "*"
    ["_" test {"+" Test}]
-   ["[0]" meta]
    [abstract
     [monad {"+" do}]
     [\\specification
@@ -22,7 +21,10 @@
    [math
     ["[0]" random {"+" Random} ("[1]#[0]" monad)]
     [number
-     ["n" nat]]]]]
+     ["n" nat]]]
+   ["[0]" meta
+    ["[0]" configuration "_"
+     ["$[1]" \\test]]]]]
  ["$" /////// "_"
   [macro
    ["[1][0]" code]]
@@ -36,8 +38,9 @@
   (Random Lux)
   (do random.monad
     [version random.nat
-     host (random.ascii/lower 1)]
-    (in (//.state (//.info version host)))))
+     host (random.ascii/lower 1)
+     configuration ($configuration.random 5)]
+    (in (//.state (//.info version host configuration)))))
 
 (def: (expander macro inputs state)
   /.Expander
diff --git a/stdlib/source/test/lux/tool/compiler/language/lux/analysis/module.lux b/stdlib/source/test/lux/tool/compiler/language/lux/analysis/module.lux
index d5cc7e0b8..69e7970f8 100644
--- a/stdlib/source/test/lux/tool/compiler/language/lux/analysis/module.lux
+++ b/stdlib/source/test/lux/tool/compiler/language/lux/analysis/module.lux
@@ -2,7 +2,6 @@
  [library
   [lux "*"
    ["_" test {"+" Test}]
-   ["[0]" meta]
    [abstract
     ["[0]" monad {"+" do}]]
    [control
@@ -18,7 +17,10 @@
    [math
     ["[0]" random {"+" Random}]
     [number
-     ["n" nat]]]]]
+     ["n" nat]]]
+   ["[0]" meta
+    ["[0]" configuration "_"
+     ["$[1]" \\test]]]]]
  [\\library
   ["[0]" /
    ["/[1]" //
@@ -32,8 +34,9 @@
   (Random Lux)
   (do random.monad
     [version random.nat
-     host (random.ascii/lower 1)]
-    (in (//.state (//.info version host)))))
+     host (random.ascii/lower 1)
+     configuration ($configuration.random 5)]
+    (in (//.state (//.info version host configuration)))))
 
 (def: primitive
   (Random Type)
diff --git a/stdlib/source/test/lux/tool/compiler/language/lux/analysis/type.lux b/stdlib/source/test/lux/tool/compiler/language/lux/analysis/type.lux
index 867ef7e5a..a5f1b5797 100644
--- a/stdlib/source/test/lux/tool/compiler/language/lux/analysis/type.lux
+++ b/stdlib/source/test/lux/tool/compiler/language/lux/analysis/type.lux
@@ -11,6 +11,9 @@
     ["[0]" product]]
    [math
     ["[0]" random {"+" Random}]]
+   [meta
+    ["[0]" configuration "_"
+     ["$[1]" \\test]]]
    ["[0]" type ("[1]#[0]" equivalence)
     ["[0]" check]]]]
  [\\library
@@ -27,8 +30,9 @@
   (Random Lux)
   (do random.monad
     [version random.nat
-     host (random.ascii/lower 1)]
-    (in (//.state (//.info version host)))))
+     host (random.ascii/lower 1)
+     configuration ($configuration.random 5)]
+    (in (//.state (//.info version host configuration)))))
 
 (def: primitive
   (Random Type)
diff --git a/stdlib/source/test/lux/tool/compiler/language/lux/phase/analysis/complex.lux b/stdlib/source/test/lux/tool/compiler/language/lux/phase/analysis/complex.lux
index 21813bb01..e7f6a5093 100644
--- a/stdlib/source/test/lux/tool/compiler/language/lux/phase/analysis/complex.lux
+++ b/stdlib/source/test/lux/tool/compiler/language/lux/phase/analysis/complex.lux
@@ -26,6 +26,8 @@
      ["f" frac]]]
    [meta
     ["[0]" symbol
+     ["$[1]" \\test]]
+    ["[0]" configuration "_"
      ["$[1]" \\test]]]
    ["[0]" type ("[1]#[0]" equivalence)
     ["[0]" check]]]]
@@ -61,8 +63,9 @@
   (Random Lux)
   (do random.monad
     [version random.nat
-     host (random.ascii/lower 1)]
-    (in (//analysis.state (//analysis.info version host)))))
+     host (random.ascii/lower 1)
+     configuration ($configuration.random 5)]
+    (in (//analysis.state (//analysis.info version host configuration)))))
 
 (def: primitive
   (Random Type)
diff --git a/stdlib/source/test/lux/tool/compiler/language/lux/phase/analysis/simple.lux b/stdlib/source/test/lux/tool/compiler/language/lux/phase/analysis/simple.lux
index 45c22f1ec..86f813b1d 100644
--- a/stdlib/source/test/lux/tool/compiler/language/lux/phase/analysis/simple.lux
+++ b/stdlib/source/test/lux/tool/compiler/language/lux/phase/analysis/simple.lux
@@ -11,7 +11,10 @@
    [data
     ["[0]" product]]
    [math
-    ["[0]" random]]]]
+    ["[0]" random]]
+   [meta
+    ["[0]" configuration "_"
+     ["$[1]" \\test]]]]]
  [\\library
   ["[0]" /
    [///
@@ -75,7 +78,8 @@
         [version random.nat
          host (random.ascii/lower 1)
          module (random.ascii/lower 2)
-         .let [state (/analysis.state (/analysis.info version host))]]
+         configuration ($configuration.random 5)
+         .let [state (/analysis.state (/analysis.info version host configuration))]]
         (`` ($_ _.and
                 (_.cover [/.unit]
                          (..analysis state module .Any /.unit
diff --git a/stdlib/source/test/lux/tool/compiler/meta/cli.lux b/stdlib/source/test/lux/tool/compiler/meta/cli.lux
index 15441533e..b90b8a0b3 100644
--- a/stdlib/source/test/lux/tool/compiler/meta/cli.lux
+++ b/stdlib/source/test/lux/tool/compiler/meta/cli.lux
@@ -20,6 +20,8 @@
      ["n" nat]]]
    [meta
     ["[0]" symbol "_"
+     ["$[1]" \\test]]
+    ["[0]" configuration ("[1]#[0]" equivalence)
      ["$[1]" \\test]]]]]
  [\\library
   ["[0]" /
@@ -40,13 +42,15 @@
          target (random.ascii/lower 4)
          module (random.ascii/lower 5)
          compilers (random.list amount $/compiler.random)
+         configuration ($configuration.random 5)
          .let [compilation' ($_ list#composite
                                 (list#conjoint (list#each (|>> (list "--host_dependency")) host_dependencies))
                                 (list#conjoint (list#each (|>> (list "--library")) libraries))
                                 (list#conjoint (list#each (|>> /compiler.format (list "--compiler")) compilers))
                                 (list#conjoint (list#each (|>> (list "--source")) sources))
-                                (list "--target" target)
-                                (list "--module" module))
+                                (list "--target" target
+                                      "--module" module
+                                      "--configuration" (configuration.format configuration)))
                export ($_ list#composite
                           (list#conjoint (list#each (|>> (list "--source")) sources))
                           (list "--target" target))]]
@@ -72,6 +76,7 @@
                                  [/.Source /.#sources (list#= sources)]
                                  [/.Target /.#target (same? target)]
                                  [/.Module /.#module (same? module)]
+                                 [configuration.Configuration /.#configuration (configuration#= configuration)]
                                  ))
                            )))
             (_.cover [/.Interpretation]
@@ -93,6 +98,7 @@
                                     [/.#sources (list#= sources)]
                                     [/.#target (same? target)]
                                     [/.#module (same? module)]
+                                    [/.#configuration (configuration#= configuration)]
                                     )))))
             (_.cover [/.Export]
                      (`` (and (~~ (template [<side> <?>]
@@ -119,13 +125,15 @@
                                                       /.#compilers compilers
                                                       /.#sources sources
                                                       /.#target target
-                                                      /.#module module]}]
+                                                      /.#module module
+                                                      /.#configuration configuration]}]
                                     [{/.#Interpretation [/.#host_dependencies host_dependencies
                                                          /.#libraries libraries
                                                          /.#compilers compilers
                                                          /.#sources sources
                                                          /.#target target
-                                                         /.#module module]}]
+                                                         /.#module module
+                                                         /.#configuration configuration]}]
                                     [{/.#Export [sources target]}]
                                     )))))