diff --git a/CHANGELOG.md b/CHANGELOG.md
index f0f84f6..588bc7a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,8 @@ this project uses date-based 'snapshot' version identifiers.
 
 ### Added
 
+- Support `exhibitfiles` to set files that need to be "exhibited" in the current workspace
+
 - Variable `checkpatterns` (issue \#449)
 
 ### Changed
diff --git a/l3build-clean.lua b/l3build-clean.lua
index 5d82d10..d3d6b3f 100644
--- a/l3build-clean.lua
+++ b/l3build-clean.lua
@@ -64,7 +64,9 @@ function clean()
       end
     end
   end
-
+  for _,i in pairs(exhibitfiles) do
+    rm(currentdir, i)
+  end
   return 0
 end
 
diff --git a/l3build-unpack.lua b/l3build-unpack.lua
index 504642a..e17721e 100644
--- a/l3build-unpack.lua
+++ b/l3build-unpack.lua
@@ -39,6 +39,9 @@ function unpack(sources, sourcedirs)
       return errorlevel
     end
   end
+  for _,i in ipairs(exhibitfiles) do
+    cp(i, unpackdir, maindir)
+  end
   return 0
 end
 
diff --git a/l3build-variables.lua b/l3build-variables.lua
index 46339fa..fa8f95e 100644
--- a/l3build-variables.lua
+++ b/l3build-variables.lua
@@ -85,6 +85,7 @@ docfiles           = docfiles           or { }
 dynamicfiles       = dynamicfiles       or { }
 excludefiles       = excludefiles       or {"*~","build.lua","config-*.lua"}
 exefiles           = exefiles           or { }
+exhibitfiles       = exhibitfiles       or { }
 installfiles       = installfiles       or {"*.sty","*.cls"}
 makeindexfiles     = makeindexfiles     or {"*.ist"}
 scriptfiles        = scriptfiles        or { }
diff --git a/l3build.dtx b/l3build.dtx
index 77f9efb..fd4b9ef 100644
--- a/l3build.dtx
+++ b/l3build.dtx
@@ -89,6 +89,7 @@
 \luavarset{docfiles}          {\{ \}}{Files which are part of the documentation but should not be typeset}
 \luavarset{dynamicfiles}      {\{ \}}{Secondary files to cleared before each test is run}
 \luavarset{excludefiles}      {\{"*\string~","build.lua","config-*.lua"\}}{Files to ignore entirely (default for Emacs backup files)}
+\luavarset{exhibitfiles}      {\{ \}}{Files to \enquote{exhibit} in the current workspace}
 \luavarset{installfiles}      {\{"*.sty","*.cls"\}}{Files to install to the \texttt{tex} area of the \texttt{texmf} tree}
 \luavarset{makeindexfiles}    {\{"*.ist"\}}{MakeIndex files to be included in a TDS-style zip}
 \luavarset{scriptfiles}       {\{ \}}{Files to install to the \texttt{scripts} area of the \texttt{texmf} tree}
@@ -478,7 +479,7 @@
 % When applied to a bundle, the |clean| target is first applied to each
 % embedded modules (listed in |modules|). 
 % In addition, all the files in the directory of |build.lua| are removed
-% when matched by \var{cleanfiles}, while ignoring \var{sourcefiles}. Finally |ctandir| and |tdsdir| are removed.
+% when matched by \var{cleanfiles} and \var{exhibitfiles}, while ignoring \var{sourcefiles}. Finally |ctandir| and |tdsdir| are removed.
 % \end{buildcmd}
 %
 %
@@ -631,6 +632,9 @@
 %
 % If additional support files are required for the unpacking process, these can be enumerated in the \var{unpacksuppfiles} variable.
 % Dependencies for unpacking are defined with \var{unpackdeps}.
+% 
+% If users merged some text files (such as |*.md|) into some source files and the text files need to \enquote{exhibit} in the main directory (to preview on GitHub repository homepage, etc.), these can be enumerated in the \var{exhibitfiles} variable.
+% Then, these files will be copied from \var{unpackdir} to the main directory after unpacking.
 %
 % By default this process allows files to be accessed in all standard |texmf| trees; this can be disabled by setting \var{unpacksearch} to |false|.
 % \end{buildcmd}
@@ -2260,7 +2264,7 @@
 \showboxdepth=\maxdimen
 %    \end{macrocode}
 %
-% \begin{macro}{\logginoutput}
+% \begin{macro}{\loggingoutput}
 %   The |\showoutput| command of \LaTeX{} calls |\loggingoutput| which in turn
 %   calls |\errorstopmode| but we want to continue running without any stops.
 %    \begin{macrocode}