diff --git a/ci/README.md b/ci/README.md
index cc6f1f4..9711b0c 100644
--- a/ci/README.md
+++ b/ci/README.md
@@ -35,7 +35,7 @@ And for each crate there should exist a directory `REPO_DIR/CRATE/contrib/` cont
 
 If the repository is not a workspace then per crate files go directly in `REPO_ROOT/contrib/`.
 
-(See [Crates`](#crates) below.)
+(See [Crates](#crates) below.)
 
 ## Lock file
 
@@ -102,22 +102,22 @@ EXAMPLES=""
 #### The `EXAMPLES` variable
 
 ```bash
-EXAPMLES="example:feature"
+EXAMPLES="example:feature"
 ```
 
 ```bash
-EXAPMLES="example:feature1,feature2"
+EXAMPLES="example:feature1,feature2"
 ```
 
 ```bash
-EXAPMLES="example_a:feature1,feature2 example_b:feature1"
+EXAMPLES="example_a:feature1,feature2 example_b:feature1"
 ```
 
 
 Tip: if your example does not require any features consider using "default".
 
 ```bash
-EXAPMLES="example_a:default"
+EXAMPLES="example_a:default"
 ```
 
 ### Additional crate specific tests
@@ -212,8 +212,7 @@ jobs:
       - name: "Checkout maintainer tools"
         uses: actions/checkout@v4
         with:
-          repository: tcharding/rust-bitcoin-maintainer-tools
-          ref: 05-02-ci
+          repository: rust-bitcoin/rust-bitcoin-maintainer-tools
           path: maintainer-tools
       - name: "Select toolchain"
         uses: dtolnay/rust-toolchain@v1
diff --git a/ci/run_task.sh b/ci/run_task.sh
index ebe4ea2..c05c157 100755
--- a/ci/run_task.sh
+++ b/ci/run_task.sh
@@ -5,15 +5,23 @@
 # Shellcheck can't search dynamic paths
 # shellcheck source=/dev/null
 
-set -euox pipefail
+set -euo pipefail
 
 REPO_DIR=$(git rev-parse --show-toplevel)
 
-# Make all cargo invocations verbose.
-export CARGO_TERM_VERBOSE=true
-
-# Set to false to turn off verbose output.
-flag_verbose=true
+# Make cargo invocations verbose unless in quiet mode.
+# Also control bash debug output based on log level.
+case "${MAINTAINER_TOOLS_LOG_LEVEL:-verbose}" in
+    quiet)
+        export CARGO_TERM_VERBOSE=false
+        export CARGO_TERM_QUIET=true
+        ;;
+    *)
+        export CARGO_TERM_VERBOSE=true
+        export CARGO_TERM_QUIET=false
+        set -x
+        ;;
+esac
 
 # Use the current `Cargo.lock` file without updating it.
 cargo="cargo --locked"
@@ -22,7 +30,7 @@ usage() {
     cat <<EOF
 Usage:
 
-    ./run_task.sh CRATE TASK
+    ./run_task.sh TASK
 
 TASK
   - stable          Run tests with stable toolchain.
@@ -32,6 +40,11 @@ TASK
   - docs            Build docs with stable toolchain.
   - docsrs          Build docs with nightly toolchain.
   - bench           Run the bench tests.
+
+Environment Variables:
+  MAINTAINER_TOOLS_LOG_LEVEL    Control script and cargo output verbosity.
+    verbose (default)           Show all script and cargo messages.
+    quiet                       Suppress script messages, reduce cargo output.
 EOF
 }
 
@@ -161,7 +174,7 @@ do_test() {
 
     if [ -e ./contrib/extra_tests.sh ];
     then
-        ./contrib/extra_tests.sh
+        . ./contrib/extra_tests.sh
     fi
 }
 
@@ -241,7 +254,7 @@ do_lint_crates() {
     for crate in $CRATES; do
         pushd "$REPO_DIR/$crate" > /dev/null
         if [ -e ./contrib/extra_lints.sh ]; then
-            ./contrib/extra_lints.sh
+            . ./contrib/extra_lints.sh
         fi
         popd > /dev/null
     done
@@ -285,7 +298,7 @@ do_dup_deps() {
 
     if [ "$duplicate_dependencies" -ne 0 ]; then
         cargo tree  --target=all --all-features --duplicates
-        say_err "Dependency tree is broken, contains duplicates"
+        err "Dependency tree is broken, contains duplicates"
     fi
 
     set -o pipefail
@@ -332,14 +345,15 @@ say() {
     echo "run_task: $1"
 }
 
-say_err() {
-    say "$1" >&2
-}
-
 verbose_say() {
-    if [ "$flag_verbose" = true ]; then
-        say "$1"
-    fi
+    case "${MAINTAINER_TOOLS_LOG_LEVEL:-verbose}" in
+        quiet)
+            # Suppress verbose output.
+            ;;
+        *)
+            say "$1"
+            ;;
+    esac
 }
 
 err() {