diff --git a/.gitea/workflows/runner-test.yaml b/.gitea/workflows/runner-test.yaml
index e3e7c67..15f1ddf 100644
--- a/.gitea/workflows/runner-test.yaml
+++ b/.gitea/workflows/runner-test.yaml
@@ -1,18 +1,63 @@
-name: Runner smoke test
+
+name: Build LaTeX Assignment
 
 on:
   push:
     branches:
       - main
+  workflow_dispatch:
 
 jobs:
-  runner-test:
+  build:
+    name: Compile and publish PDF
     runs-on: latex-docker
+
     steps:
-      - name: Verify job container
+      - name: Check out source
+        uses: builtin:checkout
+
+      - name: Install Node.js in the job container
         run: |
-          echo "Runner job started"
-          cat /etc/os-release
+          set -eu
+          apt-get update
+          apt-get install -y --no-install-recommends nodejs
+          node --version
+          rm -rf /var/lib/apt/lists/*
+
+      - name: Generate build metadata
+        run: |
+          set -eu
+          printf '\\renewcommand{\\BuildCommit}{%s}\n\\renewcommand{\\BuildRun}{%s}\n' \
+            "$(git rev-parse --short HEAD)" \
+            "${GITEA_RUN_ID:-${GITHUB_RUN_ID:-manual}}" \
+            > build-metadata.tex
+          cat build-metadata.tex
+
+      - name: Verify LaTeX tools
+        run: |
+          set -eu
+          command -v latexmk
           command -v pdflatex
-          pdflatex --version
-          free -h || true
+          command -v pygmentize
+          latexmk -v
+          pygmentize -V
+
+      - name: Compile assignment
+        run: |
+          set -eu
+          latexmk -pdf \
+            -shell-escape \
+            -interaction=nonstopmode \
+            -halt-on-error \
+            devopsAssignment.tex
+
+          test -s devopsAssignment.pdf
+          ls -lh devopsAssignment.pdf
+
+      - name: Upload PDF artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: devopsAssignment-PDF
+          path: devopsAssignment.pdf
+          if-no-files-found: error
+          retention-days: 14
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..109c1ea
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+build-metadata.tex
diff --git a/devopsAssignment.tex b/devopsAssignment.tex
index 53f8778..6fa81f8 100644
--- a/devopsAssignment.tex
+++ b/devopsAssignment.tex
@@ -47,6 +47,11 @@
 \newcommand{\DueDate}{}
 \newcommand{\VERSION}{Version \DocumentVersion}
 
+% Build metadata defaults for local compilation.
+\newcommand{\BuildCommit}{local}
+\newcommand{\BuildRun}{manual}
+\InputIfFileExists{build-metadata.tex}{}{}
+
 \hypersetup{
   pdftitle={\CourseNumber\ --- Assignment \AssignmentNumber: \AssignmentTitle},
   pdfauthor={\Instructor},
@@ -93,6 +98,14 @@
 \pagenumbering{roman}
 \singlespacing
 \include{prologue}
+
+\begin{center}
+\small
+Build commit: \texttt{\BuildCommit}
+\quad
+Actions run: \texttt{\BuildRun}
+\end{center}
+
 \include{devopsIntroduction}
 \include{linuxCommands}
 \include{digitalOceanDocker}