diff --git a/README.md b/README.md
index add9590..e4cde22 100644
--- a/README.md
+++ b/README.md
@@ -82,6 +82,29 @@ ANSIBLE_COLLECTIONS_PATH="$PWD/.ansible/collections" \
   ../.venv/bin/ansible-lint .
 ```
 
+## Development and integration validation
+
+Create the workspace virtual environment described by the control repository
+and run the complete local suite from this repository with:
+
+```sh
+tests/integration
+```
+
+The driver installs the pinned collection into the ignored local `.ansible`
+directory, runs static checks, and then mutates the local host using privilege
+escalation. It manages `/usr/local/src/seriatim`,
+`/usr/local/src/seriatim.ansible-build-state`, and
+`/usr/local/bin/seriatim`; do not run it where those paths contain data that
+must be preserved. It verifies convergence, idempotence, platform guards,
+authoritative source cleanup, compiler-version invalidation, and preservation
+of a working installation after a failed build.
+
+The driver uses temporary Go wrappers and removes them on exit. It attempts to
+restore the default role state after a failure. Recovery consists only of
+rerunning `tests/integration` or the default `tests/converge.yml`; no manual
+deletion of managed paths is required.
+
 ## License
 
 BSD-3-Clause
diff --git a/tests/integration b/tests/integration
new file mode 100755
index 0000000..37e6c8b
--- /dev/null
+++ b/tests/integration
@@ -0,0 +1,129 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+repository_root=$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)
+workspace_venv=$(cd "$repository_root/../.venv" && pwd)
+test_tmp=$(mktemp -d)
+
+export ANSIBLE_COLLECTIONS_PATH="$repository_root/.ansible/collections"
+export ANSIBLE_ROLES_PATH="$(dirname "$repository_root")"
+
+playbook="$workspace_venv/bin/ansible-playbook"
+inventory="$repository_root/tests/inventory"
+converge="$repository_root/tests/converge.yml"
+
+run_converge() {
+  "$playbook" -i "$inventory" "$converge" "$@"
+}
+
+restore_default() {
+  run_converge >/dev/null 2>&1
+}
+
+cleanup() {
+  exit_status=$?
+  restore_default || true
+  rm -rf -- "$test_tmp"
+  exit "$exit_status"
+}
+trap cleanup EXIT
+
+require_clean_recap() {
+  recap_file=$1
+  grep -Eq 'changed=0 .*failed=0' "$recap_file"
+}
+
+require_changed_recap() {
+  recap_file=$1
+  grep -Eq 'changed=[1-9][0-9]* .*failed=0' "$recap_file"
+}
+
+binary_digest() {
+  sha256sum /usr/local/bin/seriatim | awk '{print $1}'
+}
+
+state_digest() {
+  sudo sha256sum /usr/local/src/seriatim.ansible-build-state/* |
+    sha256sum | awk '{print $1}'
+}
+
+cd "$repository_root"
+"$workspace_venv/bin/ansible-galaxy" collection install \
+  -p .ansible/collections -r collections/requirements.yml
+"$playbook" -i "$inventory" "$converge" --syntax-check
+"$workspace_venv/bin/ansible-lint" .
+
+run_converge
+"$playbook" -i "$inventory" tests/verify.yml
+run_converge | tee "$test_tmp/default-repeat.log"
+require_clean_recap "$test_tmp/default-repeat.log"
+
+baseline_binary=$(binary_digest)
+baseline_state=$(state_digest)
+for scenario in \
+  '{"test_distribution":"Debian","test_distribution_version":"26.04","test_architecture":"x86_64"}' \
+  '{"test_distribution":"Ubuntu","test_distribution_version":"24.04","test_architecture":"x86_64"}' \
+  '{"test_distribution":"Ubuntu","test_distribution_version":"26.04","test_architecture":"riscv64"}'
+do
+  if "$playbook" -i "$inventory" tests/unsupported.yml -e "$scenario"; then
+    echo "unsupported platform scenario unexpectedly succeeded: $scenario" >&2
+    exit 1
+  fi
+  test "$(binary_digest)" = "$baseline_binary"
+  test "$(state_digest)" = "$baseline_state"
+done
+
+sudo touch /usr/local/src/seriatim/ansible-untracked-test
+sudo sed -i '1s/^/ansible-test-change\n/' /usr/local/src/seriatim/go.mod
+run_converge
+"$playbook" -i "$inventory" tests/verify.yml
+
+compiler_wrapper="$test_tmp/go-version-wrapper"
+sed 's|@GO@|/snap/bin/go|' >"$compiler_wrapper" <<'WRAPPER'
+#!/bin/sh
+if [ "${1:-}" = version ]; then
+  echo 'go version go1.26.99 linux/amd64'
+  exit 0
+fi
+exec @GO@ "$@"
+WRAPPER
+chmod 0755 "$compiler_wrapper"
+
+run_converge -e "seriatim_go_binary=$compiler_wrapper" |
+  tee "$test_tmp/compiler-change.log"
+require_changed_recap "$test_tmp/compiler-change.log"
+run_converge -e "seriatim_go_binary=$compiler_wrapper" |
+  tee "$test_tmp/compiler-repeat.log"
+require_clean_recap "$test_tmp/compiler-repeat.log"
+run_converge | tee "$test_tmp/compiler-restore.log"
+require_changed_recap "$test_tmp/compiler-restore.log"
+run_converge | tee "$test_tmp/compiler-restored-repeat.log"
+require_clean_recap "$test_tmp/compiler-restored-repeat.log"
+
+failure_wrapper="$test_tmp/go-failure-wrapper"
+sed 's|@GO@|/snap/bin/go|' >"$failure_wrapper" <<'WRAPPER'
+#!/bin/sh
+if [ "${1:-}" = version ]; then
+  exec @GO@ version
+fi
+echo 'deliberate integration-test build failure' >&2
+exit 42
+WRAPPER
+chmod 0755 "$failure_wrapper"
+
+baseline_binary=$(binary_digest)
+baseline_state=$(state_digest)
+if run_converge -e "seriatim_go_binary=$failure_wrapper"; then
+  echo 'deliberate build failure unexpectedly succeeded' >&2
+  exit 1
+fi
+test "$(binary_digest)" = "$baseline_binary"
+test "$(state_digest)" = "$baseline_state"
+test "$(/usr/local/bin/seriatim --version)" = 'seriatim version v1.5.0'
+
+run_converge | tee "$test_tmp/final-restore.log"
+require_clean_recap "$test_tmp/final-restore.log"
+"$playbook" -i "$inventory" tests/verify.yml
+
+trap - EXIT
+rm -rf -- "$test_tmp"
diff --git a/tests/unsupported.yml b/tests/unsupported.yml
new file mode 100644
index 0000000..9f39b42
--- /dev/null
+++ b/tests/unsupported.yml
@@ -0,0 +1,12 @@
+---
+- name: Exercise Seriatim platform mutation guard
+  hosts: seriatim
+  gather_facts: false
+  become: true
+  vars:
+    ansible_facts:
+      distribution: "{{ test_distribution }}"
+      distribution_version: "{{ test_distribution_version }}"
+      architecture: "{{ test_architecture }}"
+  roles:
+    - role: ansible-role-seriatim
diff --git a/tests/verify.yml b/tests/verify.yml
new file mode 100644
index 0000000..b471c11
--- /dev/null
+++ b/tests/verify.yml
@@ -0,0 +1,97 @@
+---
+- name: Verify Seriatim installation
+  hosts: seriatim
+  gather_facts: true
+  become: true
+  vars:
+    seriatim_expected_commit: 0fc92f364316c874d366b00cdc884a33e1900b25
+    seriatim_expected_version: v1.5.0
+    seriatim_verify_source_dir: /usr/local/src/seriatim
+    seriatim_verify_binary_path: /usr/local/bin/seriatim
+    seriatim_verify_state_dir: /usr/local/src/seriatim.ansible-build-state
+  tasks:
+    - name: Inspect Seriatim source directory
+      ansible.builtin.stat:
+        path: "{{ seriatim_verify_source_dir }}"
+      register: seriatim_verify_source_stat
+
+    - name: Inspect installed Seriatim binary
+      ansible.builtin.stat:
+        path: "{{ seriatim_verify_binary_path }}"
+        checksum_algorithm: sha256
+      register: seriatim_verify_binary_stat
+
+    - name: Inspect Seriatim build state directory
+      ansible.builtin.stat:
+        path: "{{ seriatim_verify_state_dir }}"
+      register: seriatim_verify_state_stat
+
+    - name: Resolve installed Seriatim source commit
+      ansible.builtin.command:
+        argv:
+          - /usr/bin/git
+          - -C
+          - "{{ seriatim_verify_source_dir }}"
+          - rev-parse
+          - HEAD
+      register: seriatim_verify_commit
+      changed_when: false
+
+    - name: Inspect installed Seriatim source cleanliness
+      ansible.builtin.command:
+        argv:
+          - /usr/bin/git
+          - -C
+          - "{{ seriatim_verify_source_dir }}"
+          - status
+          - --porcelain
+          - --untracked-files=all
+          - --ignored
+      register: seriatim_verify_source_status
+      changed_when: false
+
+    - name: Read installed Seriatim version
+      ansible.builtin.command:
+        argv:
+          - "{{ seriatim_verify_binary_path }}"
+          - --version
+      register: seriatim_verify_version
+      changed_when: false
+
+    - name: Read stored Seriatim build inputs
+      ansible.builtin.slurp:
+        src: "{{ seriatim_verify_state_dir }}/build-inputs.json"
+      register: seriatim_verify_inputs
+
+    - name: Read stored Seriatim fingerprint
+      ansible.builtin.slurp:
+        src: "{{ seriatim_verify_state_dir }}/fingerprint.sha256"
+      register: seriatim_verify_fingerprint
+
+    - name: Read stored Seriatim checksum
+      ansible.builtin.slurp:
+        src: "{{ seriatim_verify_state_dir }}/binary.sha256"
+      register: seriatim_verify_checksum
+
+    - name: Require valid Seriatim installation state
+      ansible.builtin.assert:
+        that:
+          - ansible_facts.distribution == 'Ubuntu'
+          - ansible_facts.distribution_version is version('26.04', '==')
+          - ansible_facts.architecture in ['x86_64', 'aarch64']
+          - seriatim_verify_source_stat.stat.isdir
+          - seriatim_verify_source_stat.stat.pw_name == 'root'
+          - seriatim_verify_source_stat.stat.gr_name == 'root'
+          - seriatim_verify_binary_stat.stat.isreg
+          - seriatim_verify_binary_stat.stat.pw_name == 'root'
+          - seriatim_verify_binary_stat.stat.gr_name == 'root'
+          - seriatim_verify_binary_stat.stat.mode == '0755'
+          - seriatim_verify_state_stat.stat.isdir
+          - seriatim_verify_state_stat.stat.pw_name == 'root'
+          - seriatim_verify_state_stat.stat.gr_name == 'root'
+          - seriatim_verify_commit.stdout == seriatim_expected_commit
+          - seriatim_verify_source_status.stdout == ''
+          - seriatim_verify_version.stdout == 'seriatim version ' ~ seriatim_expected_version
+          - (seriatim_verify_inputs.content | b64decode | trim | hash('sha256')) == (seriatim_verify_fingerprint.content | b64decode | trim)
+          - seriatim_verify_binary_stat.stat.checksum == (seriatim_verify_checksum.content | b64decode | trim)
+        fail_msg: Installed Seriatim source, binary, or build state is inconsistent.