diff --git a/.github/renovate.json b/.github/renovate.json
index 9eca4f37d..2295bb245 100644
--- a/.github/renovate.json
+++ b/.github/renovate.json
@@ -136,6 +136,7 @@
         "roles/custom/matrix-bridge-mautrix-meta-instagram/defaults/main.yml",
         "roles/custom/matrix-bridge-mautrix-meta-messenger/defaults/main.yml",
         "roles/custom/matrix-bridge-mautrix-signal/defaults/main.yml",
+        "roles/custom/matrix-bridge-mautrix-slack/defaults/main.yml",
         "roles/custom/matrix-bridge-mautrix-telegram/defaults/main.yml",
         "roles/custom/matrix-bridge-mautrix-whatsapp/defaults/main.yml",
         "roles/custom/matrix-bridge-postmoogle/defaults/main.yml",
@@ -159,6 +160,7 @@
         "roles/custom/matrix-bot-honoroit/defaults/main.yml",
         "roles/custom/matrix-bot-meowlnir/defaults/main.yml",
         "roles/custom/matrix-bridge-mautrix-gmessages/defaults/main.yml",
+        "roles/custom/matrix-bridge-mautrix-slack/defaults/main.yml",
         "roles/custom/matrix-element-admin/defaults/main.yml",
         "roles/custom/matrix-static-files/defaults/main.yml",
         "roles/custom/matrix-synapse-auto-compressor/defaults/main.yml"
diff --git a/roles/custom/matrix-bridge-mautrix-slack/molecule/default/converge.yml b/roles/custom/matrix-bridge-mautrix-slack/molecule/default/converge.yml
new file mode 100644
index 000000000..b4e018630
--- /dev/null
+++ b/roles/custom/matrix-bridge-mautrix-slack/molecule/default/converge.yml
@@ -0,0 +1,36 @@
+# SPDX-FileCopyrightText: 2026 Slavi Pantaleev
+#
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+---
+- name: Include roles for mautrix-slack Molecule tests
+  hosts: all
+  become: true
+  vars_files:
+    - "{{ lookup('env', 'MOLECULE_PROJECT_DIRECTORY') }}/../../../molecule-shared/playbook-context.yml"
+  gather_facts: true
+  tasks:
+    - name: Include roles for mautrix-slack Molecule tests
+      ansible.builtin.include_role:
+        name: "{{ role_name }}"
+        public: true
+      loop:
+        - com.devture.ansible.role.playbook_help
+        - com.devture.ansible.role.systemd_docker_base
+        - "custom/{{ lookup('env', 'MOLECULE_PROJECT_DIRECTORY') | basename }}"
+      loop_control:
+        loop_var: role_name
+
+- name: Ensure mautrix-slack is started
+  hosts: all
+  become: true
+  gather_facts: false
+  tasks:
+    - name: Ensure systemd daemon is reloaded
+      ansible.builtin.systemd_service:
+        daemon_reload: true
+
+    - name: Ensure the mautrix-slack systemd service is started
+      ansible.builtin.systemd_service:
+        name: matrix-mautrix-slack.service
+        state: started
diff --git a/roles/custom/matrix-bridge-mautrix-slack/molecule/default/molecule.yml b/roles/custom/matrix-bridge-mautrix-slack/molecule/default/molecule.yml
new file mode 100644
index 000000000..310a49e34
--- /dev/null
+++ b/roles/custom/matrix-bridge-mautrix-slack/molecule/default/molecule.yml
@@ -0,0 +1,103 @@
+# SPDX-FileCopyrightText: 2026 Slavi Pantaleev
+#
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+---
+dependency:
+  name: galaxy
+  options:
+    requirements-file: requirements.yml
+    force: true
+driver:
+  name: docker
+platforms:
+  - name: mautrix-slack-${MOLECULE_DISTRO:-ubuntu2604}-default
+    image: "geerlingguy/docker-${MOLECULE_DISTRO:-ubuntu2604}-ansible:latest"
+    command: ${MOLECULE_DOCKER_COMMAND:-""}
+    volumes:
+      - /sys/fs/cgroup:/sys/fs/cgroup:rw
+    cgroupns_mode: host
+    privileged: true
+    pre_build_image: true
+provisioner:
+  name: ansible
+  config_options:
+    defaults:
+      callback_result_format: yaml
+  inventory:
+    group_vars:
+      all:
+        matrix_bridge_mautrix_slack_container_network: mautrix-slack-molecule
+
+        # The stub prepare.yml starts is not a real homeserver, and the scenario carries
+        # no Slack token, credentials, or workspace. Logged out is the intended boundary.
+        matrix_bridge_mautrix_slack_homeserver_address: http://matrix.molecule.local:8008
+        matrix_bridge_mautrix_slack_homeserver_domain: molecule.local
+        matrix_bridge_mautrix_slack_homeserver_async_media: true
+
+        # Postgres is the normal deployment path. Non-default database and user names make
+        # the resulting schema evidence that the role composed and supplied this connection.
+        matrix_bridge_mautrix_slack_database_engine: postgres
+        matrix_bridge_mautrix_slack_database_hostname: matrix-postgres-molecule
+        matrix_bridge_mautrix_slack_database_name: molecule_slack
+        matrix_bridge_mautrix_slack_database_username: molecule_slack
+        matrix_bridge_mautrix_slack_database_password: molecule_pg_password_6e95b1
+
+        # Test-only fixtures which must reach both config.yaml and registration.yaml.
+        matrix_bridge_mautrix_slack_appservice_token: molecule_slack_as_token_d1504c
+        matrix_bridge_mautrix_slack_homeserver_token: molecule_slack_hs_token_b873a0
+
+        # All differ from role defaults, allowing parsed checks to prove role rendering.
+        matrix_bridge_mautrix_slack_appservice_bot_username: molecule-slackbot
+        matrix_bridge_mautrix_slack_network_displayname_template: "{% raw %}{{ .Name }} @ {{ .Team.Domain }} (Molecule){% endraw %}"
+        matrix_bridge_mautrix_slack_command_prefix: "!molecule-slack"
+        matrix_bridge_mautrix_slack_bridge_permissions:
+          "*": commands
+          molecule.local: admin
+        matrix_bridge_mautrix_slack_bridge_relay_enabled: true
+        matrix_bridge_mautrix_slack_bridge_relay_admin_only: false
+        matrix_bridge_mautrix_slack_bridge_relay_default_relays:
+          - molecule-workspace/molecule-relay
+        matrix_bridge_mautrix_slack_backfill_enabled: false
+        matrix_bridge_mautrix_slack_backfill_max_initial_messages: 19
+        matrix_bridge_mautrix_slack_backfill_max_catchup_messages: 31
+        matrix_bridge_mautrix_slack_backfill_unread_hours_threshold: 73
+        matrix_bridge_mautrix_slack_backfill_threads_max_initial_messages: 11
+        matrix_bridge_mautrix_slack_provisioning_shared_secret: molecule_provisioning_secret_204c17
+        matrix_bridge_mautrix_slack_public_media_signing_key: molecule_public_media_key_2a593d
+        matrix_bridge_mautrix_slack_double_puppet_secrets_custom:
+          molecule.remote: molecule_double_puppet_secret_a7d210
+        matrix_bridge_mautrix_slack_logging_level: info
+
+        # Traefik is not started. These values exercise both the public address the bridge
+        # consumes and the exposure labels Docker consumes.
+        matrix_bridge_mautrix_slack_exposure_enabled: true
+        matrix_bridge_mautrix_slack_exposure_hostname: slack-api.molecule.local
+        matrix_bridge_mautrix_slack_exposure_path_prefix: /bridges/slack-api
+        matrix_bridge_mautrix_slack_scheme: http
+        matrix_bridge_mautrix_slack_container_labels_traefik_entrypoints: web
+        matrix_bridge_mautrix_slack_container_labels_additional_labels: |
+          molecule.slack.coverage=enabled
+
+        # verify.yml is a separate play, where role defaults are out of scope.
+        matrix_bridge_mautrix_slack_base_path: /matrix/mautrix-slack
+        matrix_bridge_mautrix_slack_config_path: /matrix/mautrix-slack/config
+        matrix_bridge_mautrix_slack_data_path: /matrix/mautrix-slack/data
+  env:
+    # Workaround for https://github.com/ansible/molecule/issues/4391
+    ANSIBLE_ROLES_PATH: ${MOLECULE_PROJECT_DIRECTORY}/../..:/.ansible/roles:/usr/share/ansible/roles:/etc/ansible/roles:${ANSIBLE_HOME:-~/.ansible}/roles
+scenario:
+  test_sequence:
+    - dependency
+    - cleanup
+    - destroy
+    - syntax
+    - create
+    - prepare
+    - converge
+    - idempotence
+    - verify
+    - cleanup
+    - destroy
+verifier:
+  name: ansible
diff --git a/roles/custom/matrix-bridge-mautrix-slack/molecule/default/prepare.yml b/roles/custom/matrix-bridge-mautrix-slack/molecule/default/prepare.yml
new file mode 100644
index 000000000..c7faedf61
--- /dev/null
+++ b/roles/custom/matrix-bridge-mautrix-slack/molecule/default/prepare.yml
@@ -0,0 +1,87 @@
+# SPDX-FileCopyrightText: 2026 Slavi Pantaleev
+#
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+---
+- name: Prepare mautrix-slack Molecule tests
+  hosts: all
+  become: true
+  vars_files:
+    - "{{ lookup('env', 'MOLECULE_PROJECT_DIRECTORY') }}/../../../molecule-shared/vars.yml"
+    - "{{ lookup('env', 'MOLECULE_PROJECT_DIRECTORY') }}/../../../molecule-shared/playbook-context.yml"
+  gather_facts: true
+  tasks:
+    - name: Ensure apt cache is updated
+      ansible.builtin.apt:
+        update_cache: true
+        cache_valid_time: 600
+      when: ansible_facts['os_family'] == 'Debian'
+
+    - name: Ensure required packages are installed
+      ansible.builtin.package:
+        name:
+          - python3-requests
+          - fuse-overlayfs
+        state: present
+
+    - name: Ensure Docker is installed
+      ansible.builtin.include_role:
+        name: ansible-role-docker
+      vars:
+        docker_daemon_options:
+          storage-driver: fuse-overlayfs
+
+    - name: Ensure the matrix group exists
+      ansible.builtin.group:
+        name: "{{ matrix_group_name }}"
+        gid: "{{ matrix_user_gid }}"
+        state: present
+
+    - name: Ensure the matrix user exists
+      ansible.builtin.user:
+        name: "{{ matrix_user_name }}"
+        uid: "{{ matrix_user_uid }}"
+        group: "{{ matrix_group_name }}"
+        create_home: false
+        system: true
+        state: present
+
+    - name: Ensure the base data path exists
+      ansible.builtin.file:
+        path: "{{ matrix_base_data_path }}"
+        state: directory
+        owner: "{{ matrix_user_name }}"
+        group: "{{ matrix_group_name }}"
+        mode: "0750"
+
+    # The role creates this during converge, but both dependencies attach to it first.
+    - name: Ensure the container network the role attaches to exists
+      ansible.builtin.command:
+        argv:
+          - docker
+          - network
+          - create
+          - "{{ matrix_bridge_mautrix_slack_container_network }}"
+      register: mautrix_slack_molecule_network
+      changed_when: mautrix_slack_molecule_network.rc == 0
+      failed_when:
+        - mautrix_slack_molecule_network.rc != 0
+        - "'already exists' not in mautrix_slack_molecule_network.stderr"
+
+    - name: Ensure Postgres is running
+      ansible.builtin.include_tasks:
+        file: "{{ lookup('env', 'MOLECULE_PROJECT_DIRECTORY') }}/../../../molecule-shared/tasks/postgres.yml"
+      vars:
+        molecule_shared_postgres_network: "{{ matrix_bridge_mautrix_slack_container_network }}"
+        molecule_shared_postgres_database: "{{ matrix_bridge_mautrix_slack_database_name }}"
+        molecule_shared_postgres_username: "{{ matrix_bridge_mautrix_slack_database_username }}"
+        molecule_shared_postgres_password: "{{ matrix_bridge_mautrix_slack_database_password }}"
+
+    # The logged-out bridge still checks its appservice bot identity during startup.
+    - name: Ensure the homeserver stub is running
+      ansible.builtin.include_tasks:
+        file: "{{ lookup('env', 'MOLECULE_PROJECT_DIRECTORY') }}/../../../molecule-shared/tasks/homeserver-stub.yml"
+      vars:
+        molecule_shared_stub_network: "{{ matrix_bridge_mautrix_slack_container_network }}"
+        molecule_shared_stub_server_name: "{{ matrix_bridge_mautrix_slack_homeserver_domain }}"
+        molecule_shared_stub_user_id: "@{{ matrix_bridge_mautrix_slack_appservice_bot_username }}:{{ matrix_bridge_mautrix_slack_homeserver_domain }}"
diff --git a/roles/custom/matrix-bridge-mautrix-slack/molecule/default/requirements.yml b/roles/custom/matrix-bridge-mautrix-slack/molecule/default/requirements.yml
new file mode 120000
index 000000000..1567a5392
--- /dev/null
+++ b/roles/custom/matrix-bridge-mautrix-slack/molecule/default/requirements.yml
@@ -0,0 +1 @@
+../../../../../molecule-shared/requirements.yml
\ No newline at end of file
diff --git a/roles/custom/matrix-bridge-mautrix-slack/molecule/default/verify.yml b/roles/custom/matrix-bridge-mautrix-slack/molecule/default/verify.yml
new file mode 100644
index 000000000..2a7cefae4
--- /dev/null
+++ b/roles/custom/matrix-bridge-mautrix-slack/molecule/default/verify.yml
@@ -0,0 +1,399 @@
+# SPDX-FileCopyrightText: 2026 Slavi Pantaleev
+#
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+---
+# Proves the logged-out bridge starts, accepts the role-rendered configuration and
+# registration, migrates real Postgres, and opens its appservice listener. Slack
+# credentials and workspace access are deliberately outside the scenario boundary.
+- name: Verify mautrix-slack
+  hosts: all
+  become: true
+  vars_files:
+    - "{{ lookup('env', 'MOLECULE_PROJECT_DIRECTORY') }}/../../../molecule-shared/vars.yml"
+    - "{{ lookup('env', 'MOLECULE_PROJECT_DIRECTORY') }}/../../../molecule-shared/playbook-context.yml"
+  vars:
+    mautrix_slack_config: "{{ mautrix_slack_config_file.content | b64decode | from_yaml }}"
+    mautrix_slack_registration: "{{ mautrix_slack_registration_file.content | b64decode | from_yaml }}"
+    mautrix_slack_labels_rendered: "{{ mautrix_slack_labels_file.content | b64decode }}"
+    mautrix_slack_expected_public_address: http://slack-api.molecule.local/bridges/slack-api
+  gather_facts: false
+
+  tasks:
+    # A Renovate bump changes this source of truth and therefore the image expectation.
+    - name: Load the role's defaults under a separate name
+      ansible.builtin.include_vars:
+        file: "{{ lookup('env', 'MOLECULE_PROJECT_DIRECTORY') }}/defaults/main.yml"
+        name: mautrix_slack_role_defaults
+
+    - name: Wait for the mautrix-slack service to become active
+      ansible.builtin.systemd_service:
+        name: matrix-mautrix-slack.service
+      register: mautrix_slack_service
+      until: mautrix_slack_service.status.ActiveState == 'active'
+      retries: 30
+      delay: 5
+      failed_when: false
+
+    # Restart=always makes ActiveState insufficient for detecting a crash loop.
+    - name: Assert the service is active and has not been restarting
+      ansible.builtin.assert:
+        that:
+          - mautrix_slack_service.status.ActiveState == 'active'
+          - mautrix_slack_service.status.NRestarts is defined
+          - mautrix_slack_service.status.NRestarts | int == 0
+        fail_msg: >-
+          matrix-mautrix-slack.service is
+          {{ mautrix_slack_service.status.ActiveState | default('unknown') }} after
+          {{ mautrix_slack_service.status.NRestarts | default('?') }} restart(s)
+        success_msg: "matrix-mautrix-slack.service is active and has not restarted"
+
+    - name: Wait for the bridge liveness endpoint
+      ansible.builtin.command:
+        argv:
+          - docker
+          - run
+          - --rm
+          - --network={{ matrix_bridge_mautrix_slack_container_network }}
+          - "{{ molecule_shared_image_curl }}"
+          - --silent
+          - --output
+          - /dev/null
+          - --write-out
+          - "HTTP_STATUS=%{http_code}"
+          - http://matrix-mautrix-slack:8080/_matrix/mau/live
+      register: mautrix_slack_live
+      changed_when: false
+      until: mautrix_slack_live.rc == 0 and mautrix_slack_live.stdout == 'HTTP_STATUS=200'
+      retries: 24
+      delay: 5
+      failed_when: false
+
+    - name: Wait for the bridge readiness endpoint
+      ansible.builtin.command:
+        argv:
+          - docker
+          - run
+          - --rm
+          - --network={{ matrix_bridge_mautrix_slack_container_network }}
+          - "{{ molecule_shared_image_curl }}"
+          - --silent
+          - --output
+          - /dev/null
+          - --write-out
+          - "HTTP_STATUS=%{http_code}"
+          - http://matrix-mautrix-slack:8080/_matrix/mau/ready
+      register: mautrix_slack_ready
+      changed_when: false
+      until: mautrix_slack_ready.rc == 0 and mautrix_slack_ready.stdout == 'HTTP_STATUS=200'
+      retries: 24
+      delay: 5
+      failed_when: false
+
+    - name: Assert the bridge is live and ready on the configured appservice port
+      ansible.builtin.assert:
+        that:
+          - mautrix_slack_live.rc == 0
+          - mautrix_slack_live.stdout == 'HTTP_STATUS=200'
+          - mautrix_slack_ready.rc == 0
+          - mautrix_slack_ready.stdout == 'HTTP_STATUS=200'
+        fail_msg: >-
+          Health probes returned live={{ mautrix_slack_live.stdout | default('none') }}
+          (rc={{ mautrix_slack_live.rc | default('?') }}) and
+          ready={{ mautrix_slack_ready.stdout | default('none') }}
+          (rc={{ mautrix_slack_ready.rc | default('?') }})
+        success_msg: "The bridge is live and ready on the configured appservice port"
+
+    # This authenticated endpoint exercises the provisioning middleware and the network
+    # connector's login-flow API without starting a Slack login or carrying credentials.
+    - name: Query the authenticated provisioning login flows
+      ansible.builtin.command:
+        argv:
+          - docker
+          - run
+          - --rm
+          - --network={{ matrix_bridge_mautrix_slack_container_network }}
+          - "{{ molecule_shared_image_curl }}"
+          - --silent
+          - --show-error
+          - --fail-with-body
+          - --header
+          - "Authorization: Bearer {{ matrix_bridge_mautrix_slack_provisioning_shared_secret }}"
+          - "http://matrix-mautrix-slack:8080/_matrix/provision/v3/login/flows?user_id=%40alice%3Amolecule.local"
+      register: mautrix_slack_login_flows
+      changed_when: false
+
+    - name: Query the provisioning API with an invalid secret
+      ansible.builtin.command:
+        argv:
+          - docker
+          - run
+          - --rm
+          - --network={{ matrix_bridge_mautrix_slack_container_network }}
+          - "{{ molecule_shared_image_curl }}"
+          - --silent
+          - --output
+          - /dev/null
+          - --write-out
+          - "HTTP_STATUS=%{http_code}"
+          - --header
+          - "Authorization: Bearer definitely-wrong-molecule-secret"
+          - "http://matrix-mautrix-slack:8080/_matrix/provision/v3/login/flows?user_id=%40alice%3Amolecule.local"
+      register: mautrix_slack_login_flows_unauthorized
+      changed_when: false
+      failed_when: false
+
+    - name: Assert the live provisioning API enforces auth and advertises login flows
+      ansible.builtin.assert:
+        that:
+          - mautrix_slack_login_flows.rc == 0
+          - (mautrix_slack_login_flows.stdout | from_json).flows is sequence
+          - (mautrix_slack_login_flows.stdout | from_json).flows | length > 0
+          - mautrix_slack_login_flows_unauthorized.rc == 0
+          - mautrix_slack_login_flows_unauthorized.stdout == 'HTTP_STATUS=401'
+        fail_msg: "The provisioning API did not enforce its secret or return Slack login flows"
+        success_msg: "The provisioning API enforces its secret and returns Slack login flows"
+
+    - name: Read the configuration the role rendered
+      ansible.builtin.slurp:
+        src: "{{ matrix_bridge_mautrix_slack_config_path }}/config.yaml"
+      register: mautrix_slack_config_file
+
+    - name: Assert the rendered configuration carries the appservice identity
+      ansible.builtin.assert:
+        that:
+          - mautrix_slack_config.homeserver.address == matrix_bridge_mautrix_slack_homeserver_address
+          - mautrix_slack_config.homeserver.domain == matrix_bridge_mautrix_slack_homeserver_domain
+          - mautrix_slack_config.homeserver.async_media
+          - mautrix_slack_config.appservice.id == 'slack'
+          - mautrix_slack_config.appservice.address == 'http://matrix-mautrix-slack:8080'
+          - mautrix_slack_config.appservice.public_address == mautrix_slack_expected_public_address
+          - mautrix_slack_config.appservice.bot.username == matrix_bridge_mautrix_slack_appservice_bot_username
+          - mautrix_slack_config.appservice.as_token == matrix_bridge_mautrix_slack_appservice_token
+          - mautrix_slack_config.appservice.hs_token == matrix_bridge_mautrix_slack_homeserver_token
+        fail_msg: "The rendered configuration does not carry the scenario's appservice identity"
+        success_msg: "The rendered configuration carries the scenario's appservice identity"
+
+    - name: Assert the rendered configuration carries non-default Slack behavior
+      ansible.builtin.assert:
+        that:
+          - mautrix_slack_config.network.displayname_template == matrix_bridge_mautrix_slack_network_displayname_template
+          - mautrix_slack_config.bridge.command_prefix == matrix_bridge_mautrix_slack_command_prefix
+          - mautrix_slack_config.bridge.permissions['*'] == 'commands'
+          - mautrix_slack_config.bridge.permissions[matrix_bridge_mautrix_slack_homeserver_domain] == 'admin'
+          - mautrix_slack_config.bridge.relay.enabled
+          - not mautrix_slack_config.bridge.relay.admin_only
+          - mautrix_slack_config.bridge.relay.default_relays == ['molecule-workspace/molecule-relay']
+          - mautrix_slack_config.logging.min_level == matrix_bridge_mautrix_slack_logging_level
+        fail_msg: "The rendered configuration does not carry the scenario's Slack behavior"
+        success_msg: "The rendered configuration carries the scenario's Slack behavior"
+
+    - name: Assert the rendered configuration carries integration secrets
+      ansible.builtin.assert:
+        that:
+          - mautrix_slack_config.provisioning.shared_secret == matrix_bridge_mautrix_slack_provisioning_shared_secret
+          - mautrix_slack_config.public_media.signing_key == matrix_bridge_mautrix_slack_public_media_signing_key
+          - mautrix_slack_config.double_puppet.secrets['molecule.remote'] == 'molecule_double_puppet_secret_a7d210'
+        fail_msg: "The rendered configuration does not carry the scenario's integration secrets"
+        success_msg: "The rendered configuration carries the scenario's integration secrets"
+
+    - name: Assert the rendered configuration carries the non-default backfill policy
+      ansible.builtin.assert:
+        that:
+          - not mautrix_slack_config.backfill.enabled
+          - mautrix_slack_config.backfill.max_initial_messages == 19
+          - mautrix_slack_config.backfill.max_catchup_messages == 31
+          - mautrix_slack_config.backfill.unread_hours_threshold == 73
+          - mautrix_slack_config.backfill.threads.max_initial_messages == 11
+        fail_msg: "The rendered configuration does not carry the scenario's backfill policy"
+        success_msg: "The rendered configuration carries the scenario's backfill policy"
+
+    - name: Assert the configuration points at the scenario's Postgres database
+      ansible.builtin.assert:
+        that:
+          - mautrix_slack_config.database.type == matrix_bridge_mautrix_slack_database_engine
+          - matrix_bridge_mautrix_slack_database_username in mautrix_slack_config.database.uri
+          - matrix_bridge_mautrix_slack_database_hostname in mautrix_slack_config.database.uri
+          - matrix_bridge_mautrix_slack_database_name in mautrix_slack_config.database.uri
+        fail_msg: >-
+          database.uri is {{ mautrix_slack_config.database.uri | default('unset') }}, which
+          was not composed from the scenario's connection settings
+        success_msg: "The configuration points at the scenario's Postgres database"
+
+    - name: Read the appservice registration the role rendered
+      ansible.builtin.slurp:
+        src: "{{ matrix_bridge_mautrix_slack_config_path }}/registration.yaml"
+      register: mautrix_slack_registration_file
+
+    - name: Assert the registration carries the configured handshake values
+      ansible.builtin.assert:
+        that:
+          - mautrix_slack_registration.id == 'slack'
+          - mautrix_slack_registration.as_token == matrix_bridge_mautrix_slack_appservice_token
+          - mautrix_slack_registration.hs_token == matrix_bridge_mautrix_slack_homeserver_token
+          - mautrix_slack_registration.sender_localpart == '_bot_' + matrix_bridge_mautrix_slack_appservice_bot_username
+          - mautrix_slack_registration.url == 'http://matrix-mautrix-slack:8080'
+        fail_msg: "The registration does not carry the configured handshake values"
+        success_msg: "The registration carries the configured handshake values"
+
+    - name: Assert the registration namespaces cover only Slack ghosts and the bridge bot
+      ansible.builtin.assert:
+        that:
+          - mautrix_slack_ghost_regex | length > 0
+          - mautrix_slack_bot_regex | length > 0
+          - mautrix_slack_ghost_mxid is match(mautrix_slack_ghost_regex)
+          - mautrix_slack_wrong_ghost_mxid is not match(mautrix_slack_ghost_regex)
+          - mautrix_slack_bot_mxid is match(mautrix_slack_bot_regex)
+        fail_msg: "The registration namespaces do not cover only Slack ghosts and the bot"
+        success_msg: "The registration namespaces cover only Slack ghosts and the bot"
+      vars:
+        mautrix_slack_user_regexes: "{{ mautrix_slack_registration.namespaces.users | map(attribute='regex') | list }}"
+        mautrix_slack_ghost_regex: "{{ mautrix_slack_user_regexes | select('search', 'slack_') | first | default('') }}"
+        mautrix_slack_bot_regex: "{{ mautrix_slack_user_regexes | reject('search', 'slack_') | first | default('') }}"
+        mautrix_slack_ghost_mxid: "@slack_T12345-U67890:{{ matrix_bridge_mautrix_slack_homeserver_domain }}"
+        mautrix_slack_wrong_ghost_mxid: "@discord_T12345-U67890:{{ matrix_bridge_mautrix_slack_homeserver_domain }}"
+        mautrix_slack_bot_mxid: "@{{ matrix_bridge_mautrix_slack_appservice_bot_username }}:{{ matrix_bridge_mautrix_slack_homeserver_domain }}"
+
+    # Tables can appear only after hostname resolution, authentication, and real migrations.
+    - name: List the tables the bridge created in Postgres
+      ansible.builtin.command:
+        argv:
+          - docker
+          - exec
+          - matrix-postgres-molecule
+          - psql
+          - --username={{ matrix_bridge_mautrix_slack_database_username }}
+          - --dbname={{ matrix_bridge_mautrix_slack_database_name }}
+          - --tuples-only
+          - --no-align
+          - "--command=SELECT tablename FROM pg_tables WHERE schemaname = 'public'"
+      register: mautrix_slack_tables
+      changed_when: false
+
+    - name: Assert the bridge migrated its schema into the configured database
+      ansible.builtin.assert:
+        that:
+          - mautrix_slack_tables.rc == 0
+          - "'version' in mautrix_slack_table_names"
+          - "'portal' in mautrix_slack_table_names"
+          - "'user_login' in mautrix_slack_table_names"
+          - "'message' in mautrix_slack_table_names"
+          - "'slack_version' in mautrix_slack_table_names"
+          - "'emoji' in mautrix_slack_table_names"
+          - mautrix_slack_table_names | length > 12
+        fail_msg: >-
+          The bridge did not migrate its schema into {{ matrix_bridge_mautrix_slack_database_name }}
+          (found {{ mautrix_slack_table_names | length }} table(s))
+        success_msg: "The bridge migrated its schema into the configured database"
+      vars:
+        mautrix_slack_table_names: "{{ mautrix_slack_tables.stdout_lines | select | list }}"
+
+    - name: Read the labels the role rendered
+      ansible.builtin.slurp:
+        src: "{{ matrix_bridge_mautrix_slack_base_path }}/labels"
+      register: mautrix_slack_labels_file
+
+    - name: Assert the labels route the public endpoint to the appservice port
+      ansible.builtin.assert:
+        that:
+          - "'traefik.enable=true' in mautrix_slack_labels_rendered"
+          - "'traefik.docker.network=' + matrix_bridge_mautrix_slack_container_network in mautrix_slack_labels_rendered"
+          - "'traefik.http.services.matrix-mautrix-slack-exposure.loadbalancer.server.port=8080' in mautrix_slack_labels_rendered"
+          - "'traefik.http.routers.matrix-mautrix-slack-exposure.rule=Host(`slack-api.molecule.local`) && PathPrefix(`/bridges/slack-api`)' in mautrix_slack_labels_rendered"
+          - "'traefik.http.middlewares.matrix-mautrix-slack-exposure-strip-prefix.stripprefix.prefixes=/bridges/slack-api' in mautrix_slack_labels_rendered"
+          - "'traefik.http.routers.matrix-mautrix-slack-exposure.entrypoints=web' in mautrix_slack_labels_rendered"
+          - "'traefik.http.routers.matrix-mautrix-slack-exposure.tls=false' in mautrix_slack_labels_rendered"
+          - "'molecule.slack.coverage=enabled' in mautrix_slack_labels_rendered"
+        fail_msg: "The rendered labels do not carry the scenario's exposure configuration"
+        success_msg: "The rendered labels carry the scenario's exposure configuration"
+
+    - name: Inspect the running bridge container
+      ansible.builtin.command:
+        argv:
+          - docker
+          - container
+          - inspect
+          - matrix-mautrix-slack
+      register: mautrix_slack_container_inspect
+      changed_when: false
+
+    - name: Parse the running bridge container inspection
+      ansible.builtin.set_fact:
+        mautrix_slack_container: "{{ (mautrix_slack_container_inspect.stdout | from_json) | first }}"
+
+    - name: Assert the running container uses the exact image pinned by the role
+      ansible.builtin.assert:
+        that:
+          - mautrix_slack_container.Config.Image == mautrix_slack_expected_image
+        fail_msg: >-
+          The running container uses {{ mautrix_slack_container.Config.Image }}, expected
+          {{ mautrix_slack_expected_image }}
+        success_msg: "The running container uses the exact image pinned by the role"
+      vars:
+        mautrix_slack_expected_image: >-
+          {{ mautrix_slack_role_defaults.matrix_bridge_mautrix_slack_container_image_registry_prefix_upstream_default }}mautrix/slack:{{ mautrix_slack_role_defaults.matrix_bridge_mautrix_slack_version }}
+
+    - name: Assert the running container uses the playbook-supplied runtime
+      ansible.builtin.assert:
+        that:
+          - mautrix_slack_container.Config.User == (matrix_user_uid | string) + ':' + (matrix_user_gid | string)
+          - mautrix_slack_container.Config.WorkingDir == '/data'
+          - mautrix_slack_container.Config.Cmd == ['/usr/bin/mautrix-slack', '-c', '/config/config.yaml', '-r', '/config/registration.yaml', '--no-update']
+          - mautrix_slack_container.HostConfig.RestartPolicy.Name == 'no'
+          - mautrix_slack_container.HostConfig.AutoRemove
+          - mautrix_slack_container.HostConfig.LogConfig.Type == 'none'
+        fail_msg: "The running container does not use the role's exact identity and command"
+        success_msg: "The running container uses the role's exact identity and command"
+
+    - name: Assert the running container has the intended privilege isolation
+      ansible.builtin.assert:
+        that:
+          - "'ALL' in mautrix_slack_container.HostConfig.CapDrop"
+          - not mautrix_slack_container.HostConfig.Privileged
+        fail_msg: "The running container does not have the intended privilege isolation"
+        success_msg: "The running container drops all capabilities and is unprivileged"
+
+    - name: Assert the running container carries the role's exact bind mounts
+      ansible.builtin.assert:
+        that:
+          - mautrix_slack_config_mount | length > 0
+          - mautrix_slack_config_mount.Source == matrix_bridge_mautrix_slack_config_path
+          - not mautrix_slack_config_mount.RW
+          - mautrix_slack_data_mount | length > 0
+          - mautrix_slack_data_mount.Source == matrix_bridge_mautrix_slack_data_path
+          - mautrix_slack_data_mount.RW
+          - mautrix_slack_container.Mounts | length == 2
+        fail_msg: "The running container does not carry the role's exact config and data mounts"
+        success_msg: "The running container carries read-only config and writable data mounts"
+      vars:
+        mautrix_slack_config_mount: >-
+          {{ mautrix_slack_container.Mounts
+             | selectattr('Destination', 'equalto', '/config')
+             | first | default({}) }}
+        mautrix_slack_data_mount: >-
+          {{ mautrix_slack_container.Mounts
+             | selectattr('Destination', 'equalto', '/data')
+             | first | default({}) }}
+
+    - name: Assert the rendered labels are attached to the running container
+      ansible.builtin.assert:
+        that:
+          - mautrix_slack_container.Config.Labels['traefik.enable'] == 'true'
+          - mautrix_slack_container.Config.Labels['traefik.docker.network'] == matrix_bridge_mautrix_slack_container_network
+          - mautrix_slack_container.Config.Labels['traefik.http.services.matrix-mautrix-slack-exposure.loadbalancer.server.port'] == '8080'
+          - mautrix_slack_container.Config.Labels['molecule.slack.coverage'] == 'enabled'
+        fail_msg: "The running container does not carry the labels the role rendered"
+        success_msg: "The running container carries the labels the role rendered"
+
+    - name: Assert the running container has the exact network and port exposure
+      ansible.builtin.assert:
+        that:
+          - mautrix_slack_container.HostConfig.NetworkMode == matrix_bridge_mautrix_slack_container_network
+          - matrix_bridge_mautrix_slack_container_network in mautrix_slack_container.NetworkSettings.Networks
+          - mautrix_slack_container.NetworkSettings.Networks | length == 1
+          - mautrix_slack_container.HostConfig.PortBindings | default({}, true) | length == 0
+        fail_msg: >-
+          The container has unexpected networks or host ports:
+          networks={{ mautrix_slack_container.NetworkSettings.Networks.keys() | list }},
+          ports={{ mautrix_slack_container.HostConfig.PortBindings | default({}) }}
+        success_msg: "The container uses only its dedicated network and publishes no host ports"