diff --git a/README.md b/README.md
index 12af421..8473097 100644
--- a/README.md
+++ b/README.md
@@ -64,12 +64,15 @@ service.
 
 ## Validation
 
-The repository-local integration suite installs its pinned collection, runs
-syntax checking and production-profile lint, and applies the default role. It
-uses an offline native profile inspection with the managed configuration, then
-requires clean repeated convergence. It mutates only the managed source,
-binary, configuration, and a private temporary directory, then restores the
-default deployment during cleanup.
+The repository-local integration suite installs its pinned collection and runs
+syntax checking and production-profile lint. It applies the default role, uses
+an offline native profile inspection with the managed configuration, and then
+requires clean repeated convergence. It also combines missing-binary recovery
+with a caller-supplied Go executable while dependency management is disabled,
+and covers one representative configuration with null omission, intentional
+zero and false values, backend pass-through, and offline native inspection. It
+mutates only the managed source, binary, configuration, and a private temporary
+directory, then restores the default deployment during cleanup.
 
 ```sh
 tests/integration
diff --git a/tests/integration b/tests/integration
index b27fe2f..b9f29d8 100755
--- a/tests/integration
+++ b/tests/integration
@@ -11,6 +11,7 @@ export ANSIBLE_ROLES_PATH="$(dirname "$repository_root")"
 
 inventory="$repository_root/tests/inventory"
 converge="$repository_root/tests/converge.yml"
+verify_config="$repository_root/tests/verify-config.yml"
 ansible_playbook="$workspace_venv/bin/ansible-playbook"
 binary_path=/usr/local/bin/scriptorium
 config_path=/usr/local/etc/scriptorium/config.yml
@@ -31,7 +32,8 @@ require_clean_recap() {
 
 run_converge() {
   output_file=$1
-  "$ansible_playbook" -i "$inventory" "$converge" | tee "$output_file"
+  shift
+  "$ansible_playbook" -i "$inventory" "$@" "$converge" | tee "$output_file"
 }
 
 mkdir -p "$profile_dir"
@@ -39,13 +41,17 @@ printf '%s\n' \
   'id: endpoint-profile' \
   'endpoint: http://127.0.0.1:8000/v1' \
   'model: offline-fixture' > "$profile_dir/endpoint-profile.yml"
+printf '%s\n' \
+  'id: backend-profile' \
+  'backend: fixture-backend' \
+  'model: offline-fixture' > "$profile_dir/backend-profile.yml"
 
 cd "$repository_root"
 "$workspace_venv/bin/ansible-galaxy" collection install \
   -r collections/requirements.yml \
   -p "$ANSIBLE_COLLECTIONS_PATH"
 "$ansible_playbook" -i "$inventory" --syntax-check "$converge"
-"$workspace_venv/bin/ansible-lint" "$converge"
+"$workspace_venv/bin/ansible-lint" "$converge" "$verify_config"
 
 baseline_log="$test_tmp/baseline.log"
 run_converge "$baseline_log"
@@ -54,3 +60,40 @@ run_converge "$baseline_log"
 baseline_repeat_log="$test_tmp/baseline-repeat.log"
 run_converge "$baseline_repeat_log"
 require_clean_recap "$baseline_repeat_log"
+
+custom_go_binary="$test_tmp/go"
+custom_go_invocations="$test_tmp/go-invocations.log"
+printf '%s\n' \
+  '#!/usr/bin/env bash' \
+  'set -euo pipefail' \
+  "printf '%s\\n' \"\$*\" >> $custom_go_invocations" \
+  'exec /snap/bin/go "$@"' > "$custom_go_binary"
+chmod 0755 "$custom_go_binary"
+sudo rm -f -- "$binary_path"
+recovery_log="$test_tmp/recovery.log"
+run_converge "$recovery_log" \
+  -e '{"scriptorium_manage_build_dependencies": false}' \
+  -e "scriptorium_go_binary=$custom_go_binary"
+grep -q . "$custom_go_invocations"
+"$binary_path" inspect profile --config "$config_path" \
+  --profile-dir "$profile_dir" --profile endpoint-profile
+recovery_repeat_log="$test_tmp/recovery-repeat.log"
+run_converge "$recovery_repeat_log" \
+  -e '{"scriptorium_manage_build_dependencies": false}' \
+  -e "scriptorium_go_binary=$custom_go_binary"
+require_clean_recap "$recovery_repeat_log"
+
+representative_log="$test_tmp/representative.log"
+run_converge "$representative_log" \
+  -e "scriptorium_profile_dir=$profile_dir" \
+  -e 'scriptorium_server_addr=127.0.0.1:18080' \
+  -e '{"scriptorium_server_max_request_bytes": 0, "scriptorium_server_artifact_root": null, "scriptorium_schema_dir": null, "scriptorium_defaults_render_format": "json", "scriptorium_backends": {"fixture-backend": {"endpoint": "http://127.0.0.1:8000/v1", "concurrency_limit": 1, "queue_capacity": 0, "extra_params": {"stream": false}}}}'
+"$binary_path" inspect profile --config "$config_path" --profile backend-profile
+"$ansible_playbook" -i "$inventory" \
+  -e "scriptorium_test_profile_dir=$profile_dir" "$verify_config"
+representative_repeat_log="$test_tmp/representative-repeat.log"
+run_converge "$representative_repeat_log" \
+  -e "scriptorium_profile_dir=$profile_dir" \
+  -e 'scriptorium_server_addr=127.0.0.1:18080' \
+  -e '{"scriptorium_server_max_request_bytes": 0, "scriptorium_server_artifact_root": null, "scriptorium_schema_dir": null, "scriptorium_defaults_render_format": "json", "scriptorium_backends": {"fixture-backend": {"endpoint": "http://127.0.0.1:8000/v1", "concurrency_limit": 1, "queue_capacity": 0, "extra_params": {"stream": false}}}}'
+require_clean_recap "$representative_repeat_log"
diff --git a/tests/verify-config.yml b/tests/verify-config.yml
new file mode 100644
index 0000000..2fe508e
--- /dev/null
+++ b/tests/verify-config.yml
@@ -0,0 +1,31 @@
+---
+- name: Verify representative Scriptorium configuration
+  hosts: localhost
+  gather_facts: false
+  vars:
+    scriptorium_config_path: /usr/local/etc/scriptorium/config.yml
+  tasks:
+    - name: Read the managed configuration
+      ansible.builtin.slurp:
+        src: "{{ scriptorium_config_path }}"
+      register: scriptorium_config_file
+
+    - name: Parse the managed configuration
+      ansible.builtin.set_fact:
+        scriptorium_config: "{{ scriptorium_config_file.content | b64decode | from_yaml }}"
+
+    - name: Verify representative configuration mappings
+      ansible.builtin.assert:
+        that:
+          - scriptorium_config.profile_dir == scriptorium_test_profile_dir
+          - scriptorium_config.server.addr == "127.0.0.1:18080"
+          - scriptorium_config.server.max_request_bytes == 0
+          - "'artifact_root' not in scriptorium_config.server"
+          - "'max_artifact_bytes' not in scriptorium_config.server"
+          - "'prompt_dir' not in scriptorium_config"
+          - "'schema_dir' not in scriptorium_config"
+          - scriptorium_config.defaults.render_format == "json"
+          - scriptorium_config.backends["fixture-backend"].endpoint == "http://127.0.0.1:8000/v1"
+          - scriptorium_config.backends["fixture-backend"].concurrency_limit == 1
+          - scriptorium_config.backends["fixture-backend"].queue_capacity == 0
+          - scriptorium_config.backends["fixture-backend"].extra_params.stream == false