diff --git a/.forgejo/workflows/alt.yaml b/.forgejo/workflows/alt.yaml
index 8a11c4b..ef1faa4 100644
--- a/.forgejo/workflows/alt.yaml
+++ b/.forgejo/workflows/alt.yaml
@@ -2,6 +2,7 @@ on: [push]
 jobs:
 
   alpine:
+    runs-on: ubuntu-latest
     container:
       image: ${{vars.DOCKER}}alpine:3.19
     steps:
@@ -16,6 +17,7 @@ jobs:
     - run: spcd-browse-workspace
 
   debian:
+    runs-on: ubuntu-latest
     needs: alpine
     if: failure() || success()
     container:
@@ -32,6 +34,7 @@ jobs:
     - run: spcd-browse-workspace
 
   ubuntu:
+    runs-on: ubuntu-latest
     needs: debian
     if: failure() || success()
     container:
@@ -48,6 +51,7 @@ jobs:
     - run: spcd-browse-workspace
 
   arch:
+    runs-on: ubuntu-latest
     needs: ubuntu
     if: failure() || success()
     container:
@@ -64,6 +68,7 @@ jobs:
     - run: spcd-browse-workspace
 
   opensuse:
+    runs-on: ubuntu-latest
     needs: arch
     if: failure() || success()
     container:
@@ -80,6 +85,7 @@ jobs:
     - run: spcd-browse-workspace
 
   fedora:
+    runs-on: ubuntu-latest
     needs: opensuse
     if: failure() || success()
     container:
@@ -96,6 +102,7 @@ jobs:
     - run: spcd-browse-workspace
 
   alma:
+    runs-on: ubuntu-latest
     needs: fedora
     if: failure() || success()
     container:
@@ -112,6 +119,7 @@ jobs:
     - run: spcd-browse-workspace
 
   rocky:
+    runs-on: ubuntu-latest
     needs: alma
     if: failure() || success()
     container:
diff --git a/.forgejo/workflows/main.yaml b/.forgejo/workflows/main.yaml
index 45b1978..05b6e0a 100644
--- a/.forgejo/workflows/main.yaml
+++ b/.forgejo/workflows/main.yaml
@@ -2,6 +2,7 @@ on: [push]
 jobs:
 
   alpine:
+    runs-on: ubuntu-latest
     container:
       image: ${{vars.DOCKER}}alpine:3.20
     steps:
@@ -16,6 +17,7 @@ jobs:
     - run: spcd-browse-workspace
 
   debian:
+    runs-on: ubuntu-latest
     needs: alpine
     if: failure() || success()
     container:
@@ -35,6 +37,7 @@ jobs:
     - run: spcd-synchronize
 
   ubuntu:
+    runs-on: ubuntu-latest
     needs: debian
     if: failure() || success()
     container:
@@ -51,6 +54,7 @@ jobs:
     - run: spcd-browse-workspace
 
   arch:
+    runs-on: ubuntu-latest
     needs: ubuntu
     if: failure() || success()
     container:
@@ -67,6 +71,7 @@ jobs:
     - run: spcd-browse-workspace
 
   opensuse:
+    runs-on: ubuntu-latest
     needs: arch
     if: failure() || success()
     container:
@@ -83,6 +88,7 @@ jobs:
     - run: spcd-browse-workspace
 
   fedora:
+    runs-on: ubuntu-latest
     needs: opensuse
     if: failure() || success()
     container:
@@ -99,6 +105,7 @@ jobs:
     - run: spcd-browse-workspace
 
   alma:
+    runs-on: ubuntu-latest
     needs: fedora
     if: failure() || success()
     container:
@@ -115,6 +122,7 @@ jobs:
     - run: spcd-browse-workspace
 
   rocky:
+    runs-on: ubuntu-latest
     needs: alma
     if: failure() || success()
     container:
diff --git a/pyproject.toml b/pyproject.toml
index 103539a..1436be7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,7 +18,7 @@ dependencies = ["rwx"]
 description = "Shell to Python Continuous Deployment"
 dynamic = ["version"]
 keywords = []
-license-files = { paths = ["license.md"] }
+license-files = ["license.md"]
 name = "spcd"
 readme = "readme.md"
 requires-python = ">= 3.11"
diff --git a/readme.md b/readme.md
index 0728687..552f13d 100644
--- a/readme.md
+++ b/readme.md
@@ -54,9 +54,10 @@ Picture it…
 * [X] installing Git to clone
   * [X] this project
   * [X] its parent framework
-* [X] installing both Python
+* [X] installing Python
   * [X] system environment
   * [X] virtual environment
+  * [ ] managed version
 * [X] generating a Python module to switch context
 
 #### Python
@@ -95,30 +96,16 @@ Handle project workflows in a unified way:
   * [ ] SourceHut
 
 * whatever the Operating System container
-  * [X] Alma
-    * [X] 9
-    * [X] 8
-  * [X] Alpine
-    * [X] 3.20
-    * [X] 3.19
-  * [X] Arch
-    * [X] 20240818 (.0.255804)
-    * [X] 20240101 (.0.204074)
-  * [X] Debian
-    * [X] Bookworm (12)
-    * [ ] Bullseye (11)
-  * [X] Fedora
-    * [X] 40
-    * [X] 39
-  * [ ] OpenSUSE
-    * [ ] 15.6
-    * [ ] 15.5
-  * [X] Rocky
-    * [X] 9
-    * [X] 8
-  * [X] Ubuntu
-    * [X] Noble (24.04)
-    * [ ] Jammy (22.04)
+| System   | Latest                     | Previous                   |
+|:---------|:---------------------------|:---------------------------|
+| Alma     | * [X] 9                    | * [X] 8                    |
+| Alpine   | * [X] 3.20                 | * [X] 3.19                 |
+| Arch     | * [X] 20240818 (.0.255804) | * [X] 20240101 (.0.204074) |
+| Debian   | * [X] Bookworm (12)        | * [ ] Bullseye (11)        |
+| Fedora   | * [X] 40                   | * [X] 39                   |
+| OpenSUSE | * [ ] 15.6                 | * [ ] 15.5                 |
+| Rocky    | * [X] 9                    | * [X] 8                    |
+| Ubuntu   | * [X] Noble (24.04)        | * [ ] Jammy (22.04)        |
 
 ### Environment variables
 
@@ -129,6 +116,7 @@ Handle project workflows in a unified way:
 | SPCD_GIT_RWX      | RWX Git repository       | rwx                             |
 | SPCD_GIT_SHUNIT   | ShUnit Git repository    | shunit2                         |
 | SPCD_GIT_SPCD     | SPCD Git repository      | spcd                            |
+| SPCD_REF_ARCHIVE  | Archive deployment ref   | old                             |
 | SPCD_REF_FEATURE  | Feature deployment ref   | f                               |
 | SPCD_REF_RELEASE  | Release deployment ref   | main                            |
 | SPCD_REF_STAGING  | Staging deployment ref   | dev                             |
@@ -150,44 +138,40 @@ Handle project workflows in a unified way:
 
 #### Latest
 
-| os | https | up ca | python | graphviz | plantuml | shellcheck | shunit | shfmt | gource | ffmpeg |
-|:----------------|---|---|------------:|------:|-----------:|------:|------:|-----:|-----:|-------:|
-| Arch 20240818   | ☑ | ☑ |        3.12 | 12.0  |  1.2023.13 |  0.10 | 2.1.8 |  3.8 | 0.54 |  7.0.2 |
-| Alpine 3.20     | ☑ | ☐ |        3.12 |  9.0  |  1.2024.4  |  0.10 | 2.1.8 |  3.8 | 0.54 |  6.1.1 |
-| Fedora 40       | ☑ | ☑ | 3.12 → 3.13 |  9.0  |  1.2024.6  |  0.9  | 2.1.6 |  3.7 | 0.55 |  6.1.2 |
-| Debian Bookworm | ☐ | ☐ |        3.11 |  2.42 |  1.2020.2  |  0.9  | 2.1.8 |  3.6 | 0.54 |  5.1.6 |
-| OpenSUSE 15.6   | ☐ | ☑ | 3.6  → 3.12 |  2.48 |  1.2020.9  |  0.8  | 2.1.6 |  3.5 | 0.54 |  4.4.4 |
-| Ubuntu Noble    | ☐ | ☐ |        3.12 | u2.42 | u1.2020.2  | u0.9  | 2.1.8 | u3.8 | 0.54 |  6.1.1 |
-| Alma / Rocky 9  | ☑ | ☑ | 3.9  → 3.12 |  2.44 | e1.2024.6  | e0.8  |       |      |      | e5.1.4 |
+| os | https | up ca | python | ffmpeg | gource | graphviz | plantuml | shellcheck | shfmt | shunit |
+|:----------------|---|---|------------:|-------:|-----:|------:|-----------:|------:|-----:|------:|
+| Arch 20240818   | ☑ | ☑ |        3.12 |  7.0.2 | 0.54 | 12.0  |  1.2023.13 |  0.10 |  3.8 | 2.1.8 |
+| Alpine 3.20     | ☑ | ☐ |        3.12 |  6.1.1 | 0.54 |  9.0  |  1.2024.4  |  0.10 |  3.8 | 2.1.8 |
+| Fedora 40       | ☑ | ☑ | 3.12 → 3.13 |  6.1.2 | 0.55 |  9.0  |  1.2024.6  |  0.9  |  3.7 | 2.1.6 |
+| Debian Bookworm | ☐ | ☐ |        3.11 |  5.1.6 | 0.54 |  2.42 |  1.2020.2  |  0.9  |  3.6 | 2.1.8 |
+| OpenSUSE 15.6   | ☐ | ☑ | 3.6  → 3.12 |  4.4.4 | 0.54 |  2.48 |  1.2020.9  |  0.8  |  3.5 | 2.1.6 |
+| Ubuntu Noble    | ☐ | ☐ |        3.12 |  6.1.1 | 0.54 | u2.42 | u1.2020.2  | u0.9  | u3.8 | 2.1.8 |
+| Alma / Rocky 9  | ☑ | ☑ | 3.9  → 3.12 | e5.1.4 |      |  2.44 | e1.2024.6  | e0.8  |      |       |
 
 #### Previous
 
-| os | https | up ca | python | graphviz | plantuml | shellcheck | shunit | shfmt | gource | ffmpeg |
-|:----------------|---|---|------------:|------:|-----------:|------:|------:|-----:|-----:|-------:|
-| Alpine 3.19     | ☑ | ☐ |        3.11 |  9.0  |  1.2023.12 |  0.9  | 2.1.8 |  3.7 | 0.54 |  6.1.1 |
-| Fedora 39       | ☑ | ☑ | 3.12 → 3.13 |  8.1  |  1.2024.6  |  0.9  | 2.1.6 |  3.5 | 0.55 |  6.1.1 |
-| OpenSUSE 15.5   | ☐ | ☑ | 3.6  → 3.11 |  2.48 |  1.2020.9  |  0.8  | 2.1.6 |  3.5 | 0.54 |  4.4.4 |
-| Alma / Rocky 8  | ☑ | ☑ | 3.6  → 3.12 |  2.40 | e1.2024.6  | e0.6  |       |      |      |        |
+| os | https | up ca | python | ffmpeg | gource | graphviz | plantuml | shellcheck | shfmt | shunit |
+|:----------------|---|---|------------:|-------:|-----:|------:|-----------:|------:|-----:|------:|
+| Alpine 3.19     | ☑ | ☐ |        3.11 |  6.1.1 | 0.54 |  9.0  |  1.2023.12 |  0.9  |  3.7 | 2.1.8 |
+| Fedora 39       | ☑ | ☑ | 3.12 → 3.13 |  6.1.1 | 0.55 |  8.1  |  1.2024.6  |  0.9  |  3.5 | 2.1.6 |
+| OpenSUSE 15.5   | ☐ | ☑ | 3.6  → 3.11 |  4.4.4 | 0.54 |  2.48 |  1.2020.9  |  0.8  |  3.5 | 2.1.6 |
+| Alma / Rocky 8  | ☑ | ☑ | 3.6  → 3.12 |        |      |  2.40 | e1.2024.6  | e0.6  |      |       |
 
 #### Older Python
 
-| os | https | up ca | python | graphviz | plantuml | shellcheck | shunit | shfmt | gource | ffmpeg |
-|:----------------|---|---|------------:|------:|-----------:|------:|------:|-----:|-----:|-------:|
-| Ubuntu Jammy    | ☐ | ☐ |        3.10 | u2.42 | u1.2020.2  | u0.8  | 2.1.6 | u3.4 | 0.51 |  4.4.2 |
-| Debian Bullseye | ☐ | ☐ |        3.9  |  2.42 |  1.2020.2  |  0.7  | 2.1.6 |      | 0.51 |  4.3.7 |
+| os | https | up ca | python | ffmpeg | gource | graphviz | plantuml | shellcheck | shfmt | shunit |
+|:----------------|---|---|------------:|-------:|-----:|------:|-----------:|------:|-----:|------:|
+| Ubuntu Jammy    | ☐ | ☐ |        3.10 |  4.4.2 | 0.51 | u2.42 | u1.2020.2  | u0.8  | u3.4 | 2.1.6 |
+| Debian Bullseye | ☐ | ☐ |        3.9  |  4.3.7 | 0.51 |  2.42 |  1.2020.2  |  0.7  |      | 2.1.6 |
 
 ---
 
 ## Who
 
-### By
+### Author
 
 * [Marc Beninca](https://marc.beninca.link)
 
-### For
-
-* People feeling the need to aim for consistency in the CI / CD universe
-
 ---
 
 ## Where
@@ -290,5 +274,7 @@ Handle project workflows in a unified way:
 * rpm fusion
 * tex
 * translate to french
-* try to support nix
+* try to support
+  * guix
+  * nix
 * uv
diff --git a/spcd/__init__.py b/spcd/__init__.py
index 4b9b6a5..31cd594 100644
--- a/spcd/__init__.py
+++ b/spcd/__init__.py
@@ -10,12 +10,13 @@ from rwx import fs
 from rwx.log import stream as log
 from rwx.ps import run
 
-from spcd import cmd
+from spcd import act, commands
 from spcd.ci import project, projects
 from spcd.shell import env
 from spcd.util import browse, cat, split, step
 
 COMMANDS_PREFIX = "spcd-"
+ENTRY_POINT = "__main__.py"
 
 
 def clone_project_branch() -> None:
@@ -44,6 +45,45 @@ def clone_project_branch() -> None:
         )
 
 
+def install_actions() -> None:
+    """Make actions usable in workflows."""
+    step("Install actions")
+    name = "action.yaml"
+    root = project.root / "act"
+    vpy = Path(env.SPCD_PYTHON_VENV_BINARIES) / "python"
+    for action in ("action", "synchronize"):
+        log.info(action)
+        directory = root / action
+        fs.make_directory(directory)
+        match action:
+            case "action":
+                inputs = """\
+  arg_1:
+    required: true
+  arg_2:
+    required: true
+  arg_3:
+    required: true
+  arg_4:
+    default: '"placeholder"'
+"""
+            case "synchronize":
+                inputs = """\
+  source:
+    default: out
+    required: false
+"""
+        yaml = f"""\
+runs:
+  using: composite
+  steps:
+  - run: {vpy} -m spcd {action}
+inputs:
+{inputs}"""
+        fs.write(directory / name, yaml)
+        cat(directory / name)
+
+
 def install_commands(path: Path) -> None:
     """Make commands callable in the operating system.
 
@@ -52,12 +92,12 @@ def install_commands(path: Path) -> None:
     """
     step("Install commands")
     user = Path("/usr/local/bin")
-    for command in [
+    for command in (
         "browse-workspace",
         "build-project",
         "check-project",
         "synchronize",
-    ]:
+    ):
         log.info(command)
         (user / f"{COMMANDS_PREFIX}{command}").symlink_to(path)
 
@@ -108,15 +148,20 @@ def main(main_file: Path) -> None:
     if env.SPCD_PYTHON_VENV_BINARIES not in paths:
         environ["PATH"] = pathsep.join([env.SPCD_PYTHON_VENV_BINARIES, *paths])
     path, *arguments = sys.argv
-    name = Path(path).name
-    if name == "__main__.py":
-        list_environment_variables()
-        clone_project_branch()
-        set_ssh()
-        install_commands(main_file)
-        install_python_packages()
+    if (name := Path(path).name) == ENTRY_POINT:
+        if arguments:
+            name, *arguments = arguments
+            f = getattr(act, name)
+            f(*arguments)
+        else:
+            list_environment_variables()
+            clone_project_branch()
+            set_ssh()
+            install_actions()
+            install_commands(main_file)
+            install_python_packages()
     else:
-        f = getattr(cmd, name.replace("-", "_"))
+        f = getattr(commands, name.replace("-", "_"))
         f(*arguments)
 
 
diff --git a/spcd/act.py b/spcd/act.py
new file mode 100644
index 0000000..7886bbe
--- /dev/null
+++ b/spcd/act.py
@@ -0,0 +1,62 @@
+"""Actions available for workflows."""
+
+from __future__ import annotations
+
+import os
+from ast import literal_eval
+from pathlib import Path
+
+from rwx import ps
+from rwx.log import stream as log
+
+from spcd.ci import project, projects
+from spcd.shell import env
+
+PREFIX = "INPUT_"
+
+
+def action() -> None:
+    """Display action inputs."""
+    for variable, value in parse_inputs().items():
+        log.info("%s = %s", variable, value)
+
+
+def parse_inputs() -> dict[str, object]:
+    """Parse inputs as a dictionary.
+
+    :return: name & value pairs
+    :rtype: dict[str, object]
+    """
+    inputs = {}
+    for variable, value in sorted(projects.environment.items()):
+        if variable.startswith(PREFIX):
+            name = variable.removeprefix(PREFIX).lower()
+            inputs[name] = literal_eval(value)
+    return inputs
+
+
+def synchronize(source: str | None = None, target: str | None = None) -> None:
+    """Synchronize output towards a target.
+
+    :param source: where to deploy from
+    :type source: str | None
+    :param target: where to deploy to
+    :type target: str | None
+    """
+    if not target:
+        user = "cd"
+        host = env.SPCD_PROJECT_PATH
+        root = (
+            Path(os.sep) / user / projects.group / project.name / project.branch
+        )
+        target = f"{user}@{host}:{root}"
+    if not source:
+        source = "out"
+    ps.run(
+        "rsync",
+        "--archive",
+        "--delete-before",
+        "--verbose",
+        f"{source}/",
+        f"{target}/",
+    )
diff --git a/spcd/bootstrap.sh b/spcd/bootstrap.sh
index b9b1702..3ce4993 100644
--- a/spcd/bootstrap.sh
+++ b/spcd/bootstrap.sh
@@ -1,5 +1,3 @@
-#! /usr/bin/env sh
-
 # ╭───────────────╮
 # │ __ = internal │
 # ╰───────────────╯
@@ -386,6 +384,7 @@ spcd_e_default() {
 
 	[ -n "${SPCD_GIT_SHUNIT}" ] || SPCD_GIT_SHUNIT="shunit2"
 
+	[ -n "${SPCD_REF_ARCHIVE}" ] || SPCD_REF_ARCHIVE="old"
 	[ -n "${SPCD_REF_FEATURE}" ] || SPCD_REF_FEATURE="f"
 	[ -n "${SPCD_REF_RELEASE}" ] || SPCD_REF_RELEASE="main"
 	[ -n "${SPCD_REF_STAGING}" ] || SPCD_REF_STAGING="dev"
@@ -513,7 +512,8 @@ ${SPCD_PROJECT_ROOT}$(basename "${GITHUB_SERVER_URL}")"
 	fi
 	# check project variables
 	case "${SPCD_PROJECT_BRANCH}" in
-	"${SPCD_REF_RELEASE}" | \
+	"${SPCD_REF_ARCHIVE}" | \
+		"${SPCD_REF_RELEASE}" | \
 		"${SPCD_REF_STAGING}" | \
 		"${SPCD_REF_FEATURE}") ;;
 	*) spcd_error_ci "SPCD_PROJECT_BRANCH" ;;
@@ -796,6 +796,15 @@ spcd_f_pkg() {
 	"${SPCD_OS_ALMA}" | "${SPCD_OS_ROCKY}") ;;
 	*) spcd_f_pm_pkg_install "gource" ;;
 	esac
+	# gpg
+	spcd_step "GnuPG"
+	case "${SPCD_OS_ID}" in
+	"${SPCD_OS_DEBIAN}")
+		spcd_f_pm_pkg_install "gpg"
+		;;
+	# TODO other operating systems
+	*) ;;
+	esac
 	# graphviz
 	spcd_step "GraphViz"
 	spcd_f_pm_pkg_install "graphviz"
@@ -817,6 +826,9 @@ spcd_f_pkg() {
 	# plantuml
 	spcd_step "PlantUML"
 	spcd_f_pm_pkg_install "plantuml"
+	# qrencode
+	spcd_step "QRencode"
+	spcd_f_pm_pkg_install "qrencode"
 	# rsync
 	spcd_step "Rsync"
 	spcd_f_pm_pkg_install "rsync"
@@ -840,6 +852,20 @@ spcd_f_pkg() {
 		;;
 	*) spcd_f_pm_pkg_install "shfmt" ;;
 	esac
+	# tex
+	spcd_step "TeX"
+	case "${SPCD_OS_ID}" in
+	"${SPCD_OS_DEBIAN}")
+		spcd_f_pm_pkg_install "texlive-xetex"
+		spcd_f_pm_pkg_install "texlive-lang-french"
+		spcd_f_pm_pkg_install "texlive-plain-generic"
+		spcd_f_pm_pkg_install "texlive-bibtex-extra"
+		spcd_f_pm_pkg_install "texlive-fonts-recommended"
+		spcd_f_pm_pkg_install "biber"
+		;;
+	# TODO other operating systems
+	*) ;;
+	esac
 	spcd_step_out
 }
 
@@ -1379,6 +1405,7 @@ index-url = ${SPCD_URL_PYTHON}/simple
 	spcd_step "Activate"
 	export PATH="${SPCD_PYTHON_VENV_BINARIES}:${PATH}"
 	export VIRTUAL_ENV="${SPCD_PYTHON_VENV}"
+	pip install "PyYAML"
 	spcd_step_out
 }
 
diff --git a/spcd/cmd.py b/spcd/commands.py
similarity index 64%
rename from spcd/cmd.py
rename to spcd/commands.py
index 188d191..cc1a944 100644
--- a/spcd/cmd.py
+++ b/spcd/commands.py
@@ -1,6 +1,8 @@
 """Commands available for workflows."""
 
-import os
+from __future__ import annotations
+
+from os import sep
 from pathlib import Path
 
 from rwx import ps
@@ -17,8 +19,8 @@ def spcd_browse_workspace() -> None:
 
 def spcd_build_project() -> None:
     """Perform the actual building process."""
-    for extension in ["py", "sh"]:
-        path = project.root / f"build.{extension}"
+    for extension in ("py", "sh"):
+        path = project.root / f"render.{extension}"
         if path.exists():
             ps.run(str(path))
             break
@@ -26,11 +28,25 @@ def spcd_build_project() -> None:
 
 def spcd_check_project() -> None:
     """Check the project for anything wrong."""
-    ps.run("ruff", "check")
+    ps.run(
+        "ruff",
+        "check",
+        ("--ignore", "D203,D213"),
+        "--isolated",
+        ("--select", "ALL"),
+    )
+    ps.run(
+        "ruff",
+        "format",
+        "--diff",
+        "--isolated",
+        ("--line-length", "80"),
+    )
 
 
 def spcd_synchronize(
-    source: str | None = None, target: str | None = None
+    source: str | None = None,
+    target: str | None = None,
 ) -> None:
     """Synchronize output towards a target.
 
@@ -42,9 +58,7 @@ def spcd_synchronize(
     if not target:
         user = "cd"
         host = env.SPCD_PROJECT_PATH
-        root = (
-            Path(os.sep) / user / projects.group / project.name / project.branch
-        )
+        root = Path(sep) / user / projects.group / project.name / project.branch
         target = f"{user}@{host}:{root}"
     if not source:
         source = "out"
@@ -53,6 +67,6 @@ def spcd_synchronize(
         "--archive",
         "--delete-before",
         "--verbose",
-        f"{source}/",
-        f"{target}/",
+        f"{source}{sep}",
+        f"{target}{sep}",
     )