diff --git a/abi-diff.sh b/abi-diff.sh
new file mode 100755
index 0000000..80080a6
--- /dev/null
+++ b/abi-diff.sh
@@ -0,0 +1,63 @@
+#!/bin/sh
+set -e -x
+
+# need abi-dumper vtable-dumper abi-compliance-checker ctags-universal
+# circa >= Debian 11
+
+die() {
+    echo "$1" >&1
+    exit 1
+}
+
+OLD="$1"
+NEW="${2:-HEAD}"
+
+# default to tag before $NEW
+[ "$OLD" ] || OLD="$(git describe --abbrev=0 "$NEW")"
+
+[ "$OLD" -a "$NEW" ] || die "usage: $0 <oldrev> <newrev>"
+
+echo "Diff $OLD -> $NEW"
+
+TDIR=`mktemp -d`
+trap 'rm -rf "$TDIR"' EXIT INT QUIT TERM
+
+# abi-dumper is very particular about ctags variant
+install -d "$TDIR/bin"
+ln -s "$(which ctags-universal)" "$TDIR/bin/ctags"
+PATH="$TDIR/bin:$PATH"
+
+which ctags
+ctags --version
+
+# $1 rev
+# $2 dir
+setupsrc() {
+    mkdir "$2"
+
+    git archive "$1" | tar -C "$2" -xv
+    # would be nice to use clone, and get sub-modules.
+    # but no such luck...
+    #git clone --branch "$1" --depth 1 --recurse-submodules --shallow-submodules --reference file://$PWD file://$PWD "$2"
+
+    [ -f configure/RELEASE.local ] && cp configure/RELEASE.local "$2/configure/"
+    [ -f configure/CONFIG_SITE.local ] && cp configure/CONFIG_SITE.local "$2/configure/"
+
+    sed -i -e "s|\$(TOP)|$(pwd)|g" -e 's|-Werror||g' "$2/configure"/*.local
+
+    # assume host libevent_core is available
+    #make -C "$2/bundle" libevent -j8
+    make -C "$2" CROSS_COMPILER_TARGET_ARCHS= OPT_CFLAGS='-g -Og' OPT_CXXFLAGS='-g -Og' src -j8
+
+    nm -g "$2"/lib/linux-*/libpvxs.so.* |sed -e 's|^[0-9a-f]*\s*||' > "$TDIR/$1.nm"
+
+    abi-dumper "$2"/lib/linux-*/libpvxs.so.* -o "$TDIR/$1.dump" -public-headers "$2/include" -lver "$1"
+}
+
+setupsrc "$OLD" "$TDIR/old"
+setupsrc "$NEW" "$TDIR/new"
+
+# I don't totally trust abicc, so let's have a second opinion...
+diff -u "$TDIR/$OLD.nm" "$TDIR/$NEW.nm" || true
+
+abi-compliance-checker -l libpvxs -old "$TDIR/$OLD.dump" -new "$TDIR/$NEW.dump"
diff --git a/coverage.sh b/coverage.sh
new file mode 100755
index 0000000..5a28cfe
--- /dev/null
+++ b/coverage.sh
@@ -0,0 +1,38 @@
+#!/bin/sh
+set -e -u -x
+
+# needs 'gcov' executable and gcovr script installed
+# as well https://github.com/gcovr/gcovr
+
+gcovr --version
+
+REV="${1:-HEAD}"
+
+TDIR=`mktemp -d`
+trap 'rm -rf "$TDIR"' EXIT INT QUIT TERM
+
+git archive "$REV" | tar -C "$TDIR" -xv
+
+[ -f configure/RELEASE.local ] && cp configure/RELEASE.local "$TDIR/configure/"
+[ -f configure/CONFIG_SITE.local ] && cp configure/CONFIG_SITE.local "$TDIR/configure/"
+
+sed -i -e "s|\$(TOP)|$(pwd)|g" -e 's|-Werror||g' "$TDIR/configure"/*.local
+
+make -C "$TDIR" -j8 \
+ CROSS_COMPILER_TARGET_ARCHS= \
+ CMD_CXXFLAGS='-fprofile-arcs -ftest-coverage -O0' \
+ CMD_LDFLAGS='-fprofile-arcs -ftest-coverage' \
+ test
+
+make -C "$TDIR" -j8 \
+ CROSS_COMPILER_TARGET_ARCHS= \
+ CMD_CXXFLAGS='-fprofile-arcs -ftest-coverage -O0' \
+ CMD_LDFLAGS='-fprofile-arcs -ftest-coverage' \
+ runtests
+
+OUTDIR="$PWD"
+cd "$TDIR"/src/O.linux-*
+
+gcovr -v -r .. --html --html-details -o coverage.html
+
+tar -cavf "$OUTDIR"/coverage.tar.bz2 coverage*.html
diff --git a/release.md b/release.md
new file mode 100644
index 0000000..d42e998
--- /dev/null
+++ b/release.md
@@ -0,0 +1,17 @@
+# Release Process
+
+1. Check version number in configure/CONFIG_PVXS_VERSION
+2. Remove pre-release suffix in setup.py
+3. Finalize section in documentation/releasenotes.rst
+4. Search/replace `UNRELEASED` tags in doxygen comments
+
+  git grep -l UNRELEASED */pvxs/*.h documentation/*.rst | xargs sed -i -e 's|UNRELEASED|0.0.0|g'
+
+Don't change in details.rst and releasenotes.rst
+
+## Post Release
+
+1. Update configure/CONFIG_PVXS_VERSION
+   Increment PVXS_MAINTENANCE_VERSION and add new PVXS_#_#_#
+2. Add pre-release suffix in setup.py
+3. New section in documentation/releasenotes.rst