diff --git a/Makefile b/Makefile
index 63f61458..c1b4ed72 100644
--- a/Makefile
+++ b/Makefile
@@ -29,8 +29,10 @@ build: build-deps
 
 repos:
 	rm -rf _out
+	make -C packages/library check-version-map
 	make -C packages/apps check-version-map
 	make -C packages/extra check-version-map
+	make -C packages/library repo
 	make -C packages/system repo
 	make -C packages/apps repo
 	make -C packages/extra repo
diff --git a/hack/gen_versions_map.sh b/hack/gen_versions_map.sh
index 5169bc2f..60ede8ba 100755
--- a/hack/gen_versions_map.sh
+++ b/hack/gen_versions_map.sh
@@ -16,13 +16,15 @@ if [ ! -f "$file" ] || [ ! -s "$file" ]; then
   exit 0
 fi
 
-miss_map=$(echo "$new_map" | awk 'NR==FNR { nm[$1 " " $2] = $3; next } { if (!($1 " " $2 in nm)) print $1, $2, $3}' - "$file")
+miss_map=$(mktemp)
+trap 'rm -f "$miss_map"' EXIT
+echo -n "$new_map" | awk 'NR==FNR { nm[$1 " " $2] = $3; next } { if (!($1 " " $2 in nm)) print $1, $2, $3}' - "$file" > $miss_map
 
 # search accross all tags sorted by version
 search_commits=$(git ls-remote --tags origin | awk -F/ '$3 ~ /v[0-9]+.[0-9]+.[0-9]+/ {print}' | sort -k2,2 -rV | awk '{print $1}')
 
 resolved_miss_map=$(
-  echo "$miss_map" | while read -r chart version commit; do
+  while read -r chart version commit; do
     # if version is found in HEAD, it's HEAD
     if [ "$(awk '$1 == "version:" {print $2}' ./${chart}/Chart.yaml)" = "${version}" ]; then
       echo "$chart $version HEAD"
@@ -56,7 +58,7 @@ resolved_miss_map=$(
     fi
     
     echo "$chart $version $found_tag"
-  done
+  done < $miss_map
 )
 
 printf "%s\n" "$new_map" "$resolved_miss_map" | sort -k1,1 -k2,2 -V | awk '$1' > "$file"
diff --git a/hack/package_chart.sh b/hack/package_chart.sh
new file mode 100755
index 00000000..f8ab297f
--- /dev/null
+++ b/hack/package_chart.sh
@@ -0,0 +1,65 @@
+#!/bin/sh
+
+set -e
+
+usage() {
+        printf "%s\n" "Usage:" >&2 ;
+        printf -- "%s\n" '---' >&2 ;
+        printf "%s %s\n" "$0" "INPUT_DIR OUTPUT_DIR TMP_DIR [DEPENDENCY_DIR]" >&2 ;
+        printf -- "%s\n" '---' >&2 ;
+        printf "%s\n" "Takes a helm repository from INPUT_DIR, with an optional library repository in" >&2 ;
+        printf "%s\n" "DEPENDENCY_DIR, prepares a view of the git archive at select points in history" >&2 ;
+        printf "%s\n" "in TMP_DIR and packages helm charts, outputting the tarballs to OUTPUT_DIR" >&2 ;
+}
+
+if [ "x$(basename $PWD)" != "xpackages" ]
+then
+        echo "Error: This script must run from the ./packages/ directory" >&2
+        echo >&2
+        usage
+        exit 1
+fi
+
+if [ "x$#" != "x3" ] && [ "x$#" != "x4" ]
+then
+        echo "Error: This script takes 3 or 4 arguments" >&2
+        echo "Got $# arguments:" "$@" >&2
+        echo >&2
+        usage
+        exit 1
+fi
+
+input_dir=$1
+output_dir=$2
+tmp_dir=$3
+
+if [ "x$#" = "x4" ]
+then
+        dependency_dir=$4
+fi
+
+rm -rf "${output_dir:?}"
+mkdir -p "${output_dir}"
+while read package _ commit
+do
+        # this lets devs build the packages from a dirty repo for quick local testing
+        if [ "x$commit" = "xHEAD" ]
+        then
+                helm package "${input_dir}/${package}" -d "${output_dir}"
+                continue
+        fi
+        git archive --format tar "${commit}" "${input_dir}/${package}" | tar -xf- -C "${tmp_dir}/"
+
+        # the library chart is not present in older commits and git archive doesn't fail gracefully if the path is not found
+        if [ "x${dependency_dir}" != "x" ] && git ls-tree --name-only "${commit}" "${dependency_dir}" | grep -qx "${dependency_dir}"
+        then
+                git archive --format tar "${commit}" "${dependency_dir}" | tar -xf- -C "${tmp_dir}/"
+        fi
+        helm package "${tmp_dir}/${input_dir}/${package}" -d "${output_dir}"
+        rm -rf "${tmp_dir:?}/${input_dir:?}/${package:?}"
+        if [ "x${dependency_dir}" != "x" ]
+        then
+                rm -rf "${tmp_dir:?}/${dependency_dir:?}"
+        fi
+done < "${input_dir}/versions_map"
+helm repo index "${output_dir}"
diff --git a/packages/apps/Makefile b/packages/apps/Makefile
index 506c8750..8751a048 100644
--- a/packages/apps/Makefile
+++ b/packages/apps/Makefile
@@ -1,14 +1,8 @@
-OUT=../../_out/repos/apps
-TMP=../../_out/repos/apps/historical
+OUT=../_out/repos/apps
+TMP := $(shell mktemp -d)
 
 repo:
-	rm -rf "$(OUT)"
-	mkdir -p "$(OUT)"
-	awk '$$3 != "HEAD" {print "mkdir -p $(TMP)/" $$1 "-" $$2}' versions_map | sh -ex
-	awk '$$3 != "HEAD" {print "git archive " $$3 " " $$1 " | tar -xf- --strip-components=1 -C $(TMP)/" $$1 "-" $$2 }' versions_map | sh -ex
-	helm package -d "$(OUT)" $$(find . $(TMP) -mindepth 2 -maxdepth 2 -name Chart.yaml | awk 'sub("/Chart.yaml", "")' | sort -V)
-	cd "$(OUT)" && helm repo index . --url http://cozystack.cozy-system.svc/repos/apps
-	rm -rf "$(TMP)"
+	cd .. && ../hack/package_chart.sh apps $(OUT) $(TMP) library
 
 fix-chartnames:
 	find . -maxdepth 2 -name Chart.yaml  | awk -F/ '{print $$2}' | while read i; do sed -i "s/^name: .*/name: $$i/" "$$i/Chart.yaml"; done
diff --git a/packages/apps/clickhouse/Chart.yaml b/packages/apps/clickhouse/Chart.yaml
index 935cf6af..bfb34b34 100644
--- a/packages/apps/clickhouse/Chart.yaml
+++ b/packages/apps/clickhouse/Chart.yaml
@@ -16,7 +16,7 @@ type: application
 # This is the chart version. This version number should be incremented each time you make changes
 # to the chart and its templates, including the app version.
 # Versions are expected to follow Semantic Versioning (https://semver.org/)
-version: 0.8.0
+version: 0.9.0
 
 # This is the version number of the application being deployed. This version number should be
 # incremented each time you make changes to the application. Versions are not expected to
diff --git a/packages/apps/clickhouse/charts/cozy-lib b/packages/apps/clickhouse/charts/cozy-lib
new file mode 120000
index 00000000..e1813509
--- /dev/null
+++ b/packages/apps/clickhouse/charts/cozy-lib
@@ -0,0 +1 @@
+../../../library/cozy-lib
\ No newline at end of file
diff --git a/packages/apps/clickhouse/templates/clickhouse.yaml b/packages/apps/clickhouse/templates/clickhouse.yaml
index dd4b0fdb..dd97188d 100644
--- a/packages/apps/clickhouse/templates/clickhouse.yaml
+++ b/packages/apps/clickhouse/templates/clickhouse.yaml
@@ -122,9 +122,9 @@ spec:
             - name: clickhouse
               image: clickhouse/clickhouse-server:24.9.2.42
               {{- if .Values.resources }}
-              resources: {{- toYaml .Values.resources | nindent 16 }}
+              resources: {{- include "cozy-lib.resources.sanitize" .Values.resources | nindent 16 }}
               {{- else if ne .Values.resourcesPreset "none" }}
-              resources: {{- include "resources.preset" (dict "type" .Values.resourcesPreset "Release" .Release) | nindent 16 }}
+              resources: {{- include "cozy-lib.resources.preset" .Values.resourcesPreset | nindent 16 }}
               {{- end }}
               volumeMounts:
                 - name: data-volume-template
diff --git a/packages/apps/versions_map b/packages/apps/versions_map
index 89d9990d..776c897d 100644
--- a/packages/apps/versions_map
+++ b/packages/apps/versions_map
@@ -9,7 +9,7 @@ clickhouse 0.6.0 1ec10165
 clickhouse 0.6.1 c62a83a7
 clickhouse 0.6.2 8267072d
 clickhouse 0.7.0 93bdf411
-clickhouse 0.8.0 HEAD
+clickhouse 0.9.0 HEAD
 ferretdb 0.1.0 e9716091
 ferretdb 0.1.1 91b0499a
 ferretdb 0.2.0 6c5cf5bf
diff --git a/packages/extra/Makefile b/packages/extra/Makefile
index 5586c59e..e05e4985 100644
--- a/packages/extra/Makefile
+++ b/packages/extra/Makefile
@@ -1,14 +1,8 @@
-OUT=../../_out/repos/extra
-TMP=../../_out/repos/extra/historical
+OUT=../_out/repos/extra
+TMP := $(shell mktemp -d)
 
 repo:
-	rm -rf "$(OUT)"
-	mkdir -p "$(OUT)"
-	awk '$$3 != "HEAD" {print "mkdir -p $(TMP)/" $$1 "-" $$2}' versions_map | sh -ex
-	awk '$$3 != "HEAD" {print "git archive " $$3 " " $$1 " | tar -xf- --strip-components=1 -C $(TMP)/" $$1 "-" $$2 }' versions_map | sh -ex
-	helm package -d "$(OUT)" $$(find . $(TMP) -mindepth 2 -maxdepth 2 -name Chart.yaml | awk 'sub("/Chart.yaml", "")' | sort -V)
-	cd "$(OUT)" && helm repo index . --url http://cozystack.cozy-system.svc/repos/extra
-	rm -rf "$(TMP)"
+	cd .. && ../hack/package_chart.sh extra $(OUT) $(TMP) library
 
 fix-chartnames:
 	find . -maxdepth 2 -name Chart.yaml | awk -F/ '{print $$2}' | while read i; do sed -i "s/^name: .*/name: $$i/" "$$i/Chart.yaml"; done
diff --git a/packages/library/Makefile b/packages/library/Makefile
new file mode 100644
index 00000000..664771cf
--- /dev/null
+++ b/packages/library/Makefile
@@ -0,0 +1,15 @@
+OUT=../_out/repos/library
+TMP := $(shell mktemp -d)
+
+repo:
+	cd .. && ../hack/package_chart.sh library $(OUT) $(TMP)
+
+fix-chartnames:
+	find . -maxdepth 2 -name Chart.yaml  | awk -F/ '{print $$2}' | while read i; do sed -i "s/^name: .*/name: $$i/" "$$i/Chart.yaml"; done
+
+gen-versions-map: fix-chartnames
+	../../hack/gen_versions_map.sh
+
+check-version-map: gen-versions-map
+	git diff --exit-code -- versions_map
+
diff --git a/packages/library/cozy-lib/.helmignore b/packages/library/cozy-lib/.helmignore
new file mode 100644
index 00000000..0e8a0eb3
--- /dev/null
+++ b/packages/library/cozy-lib/.helmignore
@@ -0,0 +1,23 @@
+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*.orig
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj
+.vscode/
diff --git a/packages/library/cozy-lib/Chart.yaml b/packages/library/cozy-lib/Chart.yaml
new file mode 100644
index 00000000..81a3634d
--- /dev/null
+++ b/packages/library/cozy-lib/Chart.yaml
@@ -0,0 +1,18 @@
+apiVersion: v2
+name: cozy-lib
+description: Common Cozystack templates
+
+# A chart can be either an 'application' or a 'library' chart.
+#
+# Application charts are a collection of templates that can be packaged into versioned archives
+# to be deployed.
+#
+# Library charts provide useful utilities or functions for the chart developer. They're included as
+# a dependency of application charts to inject those utilities and functions into the rendering
+# pipeline. Library charts do not define any templates and therefore cannot be deployed.
+type: library
+
+# This is the chart version. This version number should be incremented each time you make changes
+# to the chart and its templates, including the app version.
+# Versions are expected to follow Semantic Versioning (https://semver.org/)
+version: 0.1.0
diff --git a/packages/library/cozy-lib/Makefile b/packages/library/cozy-lib/Makefile
new file mode 100644
index 00000000..fa0142de
--- /dev/null
+++ b/packages/library/cozy-lib/Makefile
@@ -0,0 +1,6 @@
+include ../../../scripts/common-envs.mk
+include ../../../scripts/package.mk
+
+generate:
+	readme-generator -v values.yaml -s values.schema.json -r README.md
+
diff --git a/packages/library/cozy-lib/README.md b/packages/library/cozy-lib/README.md
new file mode 100644
index 00000000..d4bf18ad
--- /dev/null
+++ b/packages/library/cozy-lib/README.md
@@ -0,0 +1 @@
+## Parameters
diff --git a/packages/library/cozy-lib/templates/_resourcepresets.tpl b/packages/library/cozy-lib/templates/_resourcepresets.tpl
new file mode 100644
index 00000000..f6ecef3f
--- /dev/null
+++ b/packages/library/cozy-lib/templates/_resourcepresets.tpl
@@ -0,0 +1,49 @@
+{{/*
+Copyright Broadcom, Inc. All Rights Reserved.
+SPDX-License-Identifier: APACHE-2.0
+*/}}
+
+{{/* vim: set filetype=mustache: */}}
+
+{{/*
+Return a resource request/limit object based on a given preset.
+These presets are for basic testing and not meant to be used in production
+{{ include "cozy-lib.resources.preset" "nano" -}}
+*/}}
+{{- define "cozy-lib.resources.preset" -}}
+{{- $presets := dict 
+  "nano" (dict 
+      "requests" (dict "cpu" "100m" "memory" "128Mi" "ephemeral-storage" "50Mi")
+      "limits" (dict "memory" "128Mi" "ephemeral-storage" "2Gi")
+   )
+  "micro" (dict 
+      "requests" (dict "cpu" "250m" "memory" "256Mi" "ephemeral-storage" "50Mi")
+      "limits" (dict "memory" "256Mi" "ephemeral-storage" "2Gi")
+   )
+  "small" (dict 
+      "requests" (dict "cpu" "500m" "memory" "512Mi" "ephemeral-storage" "50Mi")
+      "limits" (dict "memory" "512Mi" "ephemeral-storage" "2Gi")
+   )
+  "medium" (dict 
+      "requests" (dict "cpu" "500m" "memory" "1Gi" "ephemeral-storage" "50Mi")
+      "limits" (dict "memory" "1Gi" "ephemeral-storage" "2Gi")
+   )
+  "large" (dict 
+      "requests" (dict "cpu" "1" "memory" "2Gi" "ephemeral-storage" "50Mi")
+      "limits" (dict "memory" "2Gi" "ephemeral-storage" "2Gi")
+   )
+  "xlarge" (dict 
+      "requests" (dict "cpu" "2" "memory" "4Gi" "ephemeral-storage" "50Mi")
+      "limits" (dict "memory" "4Gi" "ephemeral-storage" "2Gi")
+   )
+  "2xlarge" (dict 
+      "requests" (dict "cpu" "4" "memory" "8Gi" "ephemeral-storage" "50Mi")
+      "limits" (dict "memory" "8Gi" "ephemeral-storage" "2Gi")
+   )
+ }}
+{{- if hasKey $presets . -}}
+{{- index $presets . | toYaml -}}
+{{- else -}}
+{{- printf "ERROR: Preset key '%s' invalid. Allowed values are %s" . (join "," (keys $presets)) | fail -}}
+{{- end -}}
+{{- end -}}
diff --git a/packages/library/cozy-lib/templates/_resources.tpl b/packages/library/cozy-lib/templates/_resources.tpl
new file mode 100644
index 00000000..34ed9ca2
--- /dev/null
+++ b/packages/library/cozy-lib/templates/_resources.tpl
@@ -0,0 +1,53 @@
+{{- /*
+  A sanitized resource map is a dict with resource-name => resource-quantity.
+  If not in such a form, requests are used, then limits. All resources are set
+  to have equal requests and limits, except CPU, that has only requests. The
+  template expects to receive a dict {"requests":{...}, "limits":{...}} as
+  input, e.g. {{ include "cozy-lib.resources.sanitize" .Values.resources }}.
+  Example input:
+  ==============
+  limits:
+    cpu: 100m
+    memory: 1024Mi
+  requests:
+    cpu: 200m
+    memory: 512Mi
+  memory: 256Mi
+  devices.com/nvidia: "1"
+
+  Example output:
+  ===============
+  limits:
+    devices.com/nvidia: "1"
+    memory: 256Mi
+  requests:
+    cpu: 200m
+    devices.com/nvidia: "1"
+    memory: 256Mi
+*/}}
+{{- define "cozy-lib.resources.sanitize" }}
+{{-   $sanitizedMap := dict }}
+{{-   if hasKey . "limits" }}
+{{-     range $k, $v := .limits }}
+{{-       $_ := set $sanitizedMap $k $v }}
+{{-     end }}
+{{-   end }}
+{{-   if hasKey . "requests" }}
+{{-     range $k, $v := .requests }}
+{{-       $_ := set $sanitizedMap $k $v }}
+{{-     end }}
+{{-   end }}
+{{-   range $k, $v := . }}
+{{-     if not (or (eq $k "requests") (eq $k "limits")) }}
+{{-       $_ := set $sanitizedMap $k $v }}
+{{-     end }}
+{{-   end }}
+{{-   $output := dict "requests" dict "limits" dict }}
+{{-   range $k, $v := $sanitizedMap }}
+{{-     $_ := set $output.requests $k $v }}
+{{-     if not (eq $k "cpu") }}
+{{-       $_ := set $output.limits $k $v }}
+{{-     end }}
+{{-   end }}
+{{-   $output | toYaml }}
+{{- end  }}
diff --git a/packages/library/cozy-lib/values.schema.json b/packages/library/cozy-lib/values.schema.json
new file mode 100644
index 00000000..decc79aa
--- /dev/null
+++ b/packages/library/cozy-lib/values.schema.json
@@ -0,0 +1,5 @@
+{
+    "title": "Chart Values",
+    "type": "object",
+    "properties": {}
+}
\ No newline at end of file
diff --git a/packages/library/cozy-lib/values.yaml b/packages/library/cozy-lib/values.yaml
new file mode 100644
index 00000000..0967ef42
--- /dev/null
+++ b/packages/library/cozy-lib/values.yaml
@@ -0,0 +1 @@
+{}
diff --git a/packages/library/testfile b/packages/library/testfile
new file mode 100644
index 00000000..e69de29b
diff --git a/packages/library/versions_map b/packages/library/versions_map
new file mode 100644
index 00000000..63834fdd
--- /dev/null
+++ b/packages/library/versions_map
@@ -0,0 +1 @@
+cozy-lib 0.1.0 HEAD