diff --git a/.gitignore b/.gitignore
index f958544..c1a80aa 100644
--- a/.gitignore
+++ b/.gitignore
@@ -108,4 +108,5 @@ ENV/
 
 foo.scad
 BOSL2.wiki
+/ref/
 
diff --git a/githooks/pre-commit b/githooks/pre-commit
new file mode 100755
index 0000000..28c0139
--- /dev/null
+++ b/githooks/pre-commit
@@ -0,0 +1,17 @@
+#!/bin/sh
+
+VERFILE="version.scad"
+
+vernums=$(grep ^BOSL_VERSION "$VERFILE" | sed 's/^.*[[]\([0-9,]*\)[]].*$/\1/')
+major=$(echo "$vernums" | awk -F, '{print $1}')
+minor=$(echo "$vernums" | awk -F, '{print $2}')
+revision=$(echo "$vernums" | awk -F, '{print $3}')
+
+newrev=$(($revision+1))
+echo "Current Version: $major.$minor.$revision"
+echo "New Version: $major.$minor.$newrev"
+
+sed -i '' 's/^BOSL_VERSION = .*$/BOSL_VERSION = ['"$major,$minor,$newrev];/g" $VERFILE
+
+exec git add version.scad
+
diff --git a/githooks/pre-merge-commit b/githooks/pre-merge-commit
new file mode 100755
index 0000000..28c0139
--- /dev/null
+++ b/githooks/pre-merge-commit
@@ -0,0 +1,17 @@
+#!/bin/sh
+
+VERFILE="version.scad"
+
+vernums=$(grep ^BOSL_VERSION "$VERFILE" | sed 's/^.*[[]\([0-9,]*\)[]].*$/\1/')
+major=$(echo "$vernums" | awk -F, '{print $1}')
+minor=$(echo "$vernums" | awk -F, '{print $2}')
+revision=$(echo "$vernums" | awk -F, '{print $3}')
+
+newrev=$(($revision+1))
+echo "Current Version: $major.$minor.$revision"
+echo "New Version: $major.$minor.$newrev"
+
+sed -i '' 's/^BOSL_VERSION = .*$/BOSL_VERSION = ['"$major,$minor,$newrev];/g" $VERFILE
+
+exec git add version.scad
+
diff --git a/scripts/make_all_docs.sh b/scripts/make_all_docs.sh
index a4f45a4..83c8a3e 100755
--- a/scripts/make_all_docs.sh
+++ b/scripts/make_all_docs.sh
@@ -17,7 +17,7 @@ done
 if [[ "$FILES" != "" ]]; then
     PREVIEW_LIBS="$FILES"
 else
-    PREVIEW_LIBS="common errors attachments math arrays vectors affine coords geometry triangulation quaternions strings stacks queues structs vnf skin hull constants edges transforms primitives shapes masks shapes2d paths beziers rounding walls cubetruss metric_screws threading partitions involute_gears sliders joiners linear_bearings nema_steppers wiring phillips_drive torx_drive polyhedra knurling cubetruss debug"
+    PREVIEW_LIBS="version common errors attachments math arrays vectors affine coords geometry triangulation quaternions strings stacks queues structs vnf skin hull constants edges transforms primitives shapes masks shapes2d paths beziers rounding walls cubetruss metric_screws threading partitions involute_gears sliders joiners linear_bearings nema_steppers wiring phillips_drive torx_drive polyhedra knurling cubetruss debug"
 fi
 
 dir="$(basename $PWD)"
diff --git a/std.scad b/std.scad
index 3c23352..ffb2881 100644
--- a/std.scad
+++ b/std.scad
@@ -9,6 +9,8 @@
 
 assert(version_num()>=20190301, "BOSL2 requires OpenSCAD version 2019.03.01 or later.");
 
+include <version.scad>
+
 include <constants.scad>
 include <edges.scad>
 include <common.scad>
diff --git a/version.scad b/version.scad
new file mode 100644
index 0000000..fbf7de1
--- /dev/null
+++ b/version.scad
@@ -0,0 +1,136 @@
+//////////////////////////////////////////////////////////////////////
+// LibFile: version.scad
+//   File that provides functions to manage versioning.
+//   To use, add the following lines to the beginning of your file:
+//   ```
+//   include <BOSL2/std.scad>
+//   ```
+//////////////////////////////////////////////////////////////////////
+
+
+BOSL_VERSION = [2,0,1];
+
+
+// Section: BOSL Library Version Functions
+
+
+// Function: bosl_version()
+// Usage:
+//   ver = bosl_version();
+// Description:
+//   Returns a list with three integer elements, [MAJOR,MINOR,REV],
+//   representing the Major, Minor, and Build Revision numbers.
+//   For example, version 2.1.43 will be returned as `[2,1,43]`.
+function bosl_version() = BOSL_VERSION;
+
+
+// Function: bosl_version_num()
+// Usage:
+//   ver = bosl_version_num();
+// Description:
+//   Returns a floating point number of the version, formatted like M.mmrrrr where M is the major version number,
+//   each m is a zero-padded digit of the minor version number, and each r is a zero-padded digit of the build
+//   revision number.  For example, version 2.1.43 will be returned as `2.010043`.
+function bosl_version_num() = version_to_num(BOSL_VERSION);
+
+
+// Function: bosl_version_str()
+// Usage:
+//   ver = bosl_version_str();
+// Description:
+//   Returns a string of the version, formatted like "MAJOR.MINOR.REV".
+//   For example, version 2.1.43 will be returned as `"2.1.43"`.
+function bosl_version_str() = version_to_str(BOSL_VERSION);
+
+
+// Module: bosl_required()
+// Usage:
+//   bosl_required(x);
+// Description:
+//   Given a version as a list, number, or string, asserts that the currently installed BOSL library is at least the given version.
+module bosl_required(target) {
+	assert(
+		version_cmp(bosl_version(), target) >= 0,
+		str(
+			"BOSL ", bosl_version_str(), " is installed, but BOSL ",
+			version_to_str(target), " or better is required."  
+		)
+	);
+}
+
+
+// Section: Generic Version Functions
+
+function _version_split_str(x, _i=0, _out=[], _num=0) =
+	_i>=len(x)? concat(_out,[_num]) :
+	let(
+		cval = ord(x[_i]) - ord("0"),
+		numend = cval<0 || cval>9,
+		_out = numend? concat(_out, [_num]) : _out,
+		_num = numend? 0 : (10*_num + cval)
+	)
+	_version_split_str(x, _i=_i+1, _out=_out, _num=_num);
+
+
+// Function: version_to_list()
+// Usage:
+//   ver = version_to_list(x);
+// Description:
+//   Given a version string, number, or list, returns the list of version integers [MAJOR,MINOR,REVISION].
+// Example:
+//   v1 = version_to_list("2.1.43");  // Returns: [2,1,43]
+//   v2 = version_to_list(2.120234);  // Returns: [2,12,234]
+//   v3 = version_to_list([2,3,4]);   // Returns: [2,3,4]
+//   v4 = version_to_list([2,3,4,5]); // Returns: [2,3,4]
+function version_to_list(x) =
+	is_list(x)? x :
+	is_string(x)? _version_split_str(x) :
+	is_num(x)? [int(x), int(x*100%100), int(x*1000000%1000000)] :
+	assert(is_num(x) || is_vector(x) || is_string(x)) 0;
+
+
+// Function: version_to_str()
+// Usage:
+//   str = version_to_str(x);
+// Description:
+//   Takes a version string, number, or list, and returns the properly formatter version string for it.
+// Example:
+//   v1 = version_to_str([2,1,43]);  // Returns: "2.1.43"
+//   v2 = version_to_str(2.010043);  // Returns: "2.1.43"
+//   v3 = version_to_str(2.340789);  // Returns: "2.34.789"
+//   v4 = version_to_str("2.3.89");  // Returns: "2.3.89"
+function version_to_str(x) =
+	let(x = version_to_list(x))
+	str(x[0],".",x[1],".",x[2]);
+
+
+// Function: version_to_num()
+// Usage:
+//   str = version_to_num(x);
+// Description:
+//   Takes a version string, number, or list, and returns the properly formatter version number for it.
+// Example:
+//   v1 = version_to_num([2,1,43]);   // Returns: 2.010043
+//   v2 = version_to_num([2,34,567]); // Returns: 2.340567
+//   v3 = version_to_num(2.120567);   // Returns: 2.120567
+//   v4 = version_to_num("2.6.79");   // Returns: 2.060079
+function version_to_num(x) =
+	let(x = version_to_list(x))
+	x[0] + x[1]/100 + x[2]/1000000;
+
+
+// Function: version_cmp()
+// Usage:
+//   cmp = version_cmp(a,b);
+// Description:
+//   Given a pair of versions, in any combination of string, integer, or list, compares them, and returns the relative value of them.
+//   Returns an integer <0 if a<b.  Returns 0 if a==b.  Returns an integer >0 if a>b.
+// Example:
+//   cmp1 = version_cmp(2.010034, "2.1.33");  // Returns: >0
+//   cmp2 = version_cmp(2.010034, "2.1.34");  // Returns: 0
+//   cmp3 = version_cmp(2.010034, "2.1.35");  // Returns: <0
+function version_cmp(a,b) =
+	list_compare(version_to_list(a), version_to_list(b));
+
+
+// vim: noexpandtab tabstop=4 shiftwidth=4 softtabstop=4 nowrap