diff --git a/.github/workflows/maven-extension-jar.yml b/.github/workflows/maven-extension-jar.yml
deleted file mode 100644
index 258dc331c..000000000
--- a/.github/workflows/maven-extension-jar.yml
+++ /dev/null
@@ -1,46 +0,0 @@
-name: Maven extension jar
-
-# Builds (and smoke-tests) the Maven manifest extension jar in CI, separately
-# from release. Uses only allowlisted actions — notably NOT actions/setup-java
-# (the org allowlist forbids it), so it relies on a JDK pre-installed on the
-# runner via JAVA_HOME_17_X64, the same approach provenance.yml uses to build
-# the jar at release. Runs on changes to the extension and on demand.
-
-on:
-  pull_request:
-    paths:
-      - 'src/commands/manifest/scripts/maven-extension/**'
-      - 'src/commands/manifest/scripts/test/maven-compat/**'
-      - '.github/workflows/maven-extension-jar.yml'
-  workflow_dispatch:
-
-permissions:
-  contents: read
-
-jobs:
-  build:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-        with:
-          persist-credentials: false
-      - name: Build the Maven extension jar (pre-installed JDK; no setup-java)
-        run: |
-          if [ -n "${JAVA_HOME_17_X64:-}" ]; then
-            export JAVA_HOME="$JAVA_HOME_17_X64"
-          fi
-          java -version
-          bash src/commands/manifest/scripts/maven-extension/build-jar.sh
-      - name: Verify the jar was produced
-        run: test -f src/commands/manifest/scripts/maven-extension/coana-maven-extension.jar
-      - name: Smoke-test the extension on Maven 3.9.9
-        run: |
-          if [ -n "${JAVA_HOME_17_X64:-}" ]; then
-            export JAVA_HOME="$JAVA_HOME_17_X64"
-          fi
-          ver=3.9.9
-          curl -fsSL "https://archive.apache.org/dist/maven/maven-3/$ver/binaries/apache-maven-$ver-bin.zip" -o maven.zip
-          unzip -q maven.zip
-          bash src/commands/manifest/scripts/test/maven-compat/smoke-test.sh \
-            "$PWD/apache-maven-$ver/bin/mvn" \
-            "$PWD/src/commands/manifest/scripts/maven-extension/coana-maven-extension.jar"