fix: unique molecule container names per CI runner

When multiple molecule matrix runners share the same Docker host,
they conflict on the container name "ubuntu-2604" (409 Conflict
from Docker). This appends the MATRIX_INDEX as a suffix (e.g.
ubuntu-2604-r3) so each runner gets a unique container name.

Closes DEVX-148

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

.vale/styles/Google/Anthropomorphism.yml

@@ -0,0 +1,12 @@
+extends: existence
+message: "Don't attribute human qualities to software or hardware ('%s')."
+link: https://developers.google.com/style/anthropomorphism
+level: suggestion
+ignorecase: true
+# Limited to the two verbs the guide itself names. Broader lists (wants, knows,
+# thinks) can't tell a software subject from a human one: on a 950-file corpus
+# they produced 8 false positives ('the customer wants', 'your audience knows')
+# for every 2 real ones.
+tokens:
+  - sees
+  - tells

.vale/styles/Google/ExcessiveClaims.yml

@@ -0,0 +1,14 @@
+extends: existence
+message: "Avoid the unverifiable claim '%s'."
+link: https://developers.google.com/style/excessive-claims
+level: suggestion
+ignorecase: true
+# The guide also names 'never', 'always', and 'ensure', but in technical writing
+# those are usually legitimate instructions ('never commit secrets') rather than
+# product claims: they accounted for 125 of 142 hits on a 950-file corpus.
+# 'best practices' is a fixed term, not a superlative.
+tokens:
+  - 'best(?! practices?)'
+  - simplest
+  - fastest
+  - guarantees?

.vale/styles/Google/Jargon.yml

@@ -0,0 +1,13 @@
+extends: existence
+message: "Avoid the jargon '%s'."
+link: https://developers.google.com/style/jargon
+level: suggestion
+ignorecase: true
+# The guide also cites 'solution', 'support', and 'workload' as overloaded
+# terms, but those have ordinary technical meanings and accounted for every hit
+# on a 950-file corpus, so only the unambiguous figurative terms are listed.
+tokens:
+  - break-glass
+  - camel ?case
+  - out-of-the-box
+  - swim ?lane

.vale/styles/Google/Timeless.yml

@@ -0,0 +1,13 @@
+extends: existence
+message: "Avoid time-based words like '%s' in product documentation."
+link: https://developers.google.com/style/timeless-documentation
+level: suggestion
+ignorecase: true
+# The guide also names 'now' and 'new', but both have common senses that aren't
+# time-anchored ('create a new project'): adding them took a 950-file corpus of
+# technical documentation from 14 hits to 117. 'recently' is left out too — every
+# hit in that corpus was the UI idiom 'recently used'.
+tokens:
+  - currently
+  - latest
+  - soon

.vale/styles/Google/WordListCase.yml

@@ -0,0 +1,68 @@
+extends: substitution
+message: "Use '%s' instead of '%s'."
+link: "https://developers.google.com/style/word-list"
+level: warning
+# The case-insensitive half of the word list, so sentence-initial use is caught
+# ('Touch the screen', not only 'touch the screen'). Entries that must stay
+# case-sensitive are in WordList.yml.
+ignorecase: true
+action:
+  name: replace
+swap:
+  "(?:API Console|dev|developer) key": API key
+  "(?:cell ?phone|smart ?phone)": phone|mobile phone
+  "(?:dev|developer|APIs) console": API console
+  "(?:e-mail|Email|E-mail)": email
+  "(?:file ?path|path ?name)": path
+  "(?:kill|terminate|abort)": stop|exit|cancel|end
+  # Longest form first: with the shortest alternative leading, 'OAuth 2' matched
+  # only 'OAuth', so applying the suggestion produced 'OAuth 2.0 2'. The rule is
+  # already case-insensitive, so the inline (?i) is redundant. See issue #41.
+  '\bOauth2\.0\b|\bOAuth ?2\b(?!\.0)|\bOauth\b(?! ?2)': OAuth 2.0
+  "(?:ok|Okay)": OK|okay
+  "(?:WiFi|wifi)": Wi-Fi
+  '[\.]+apk': APK
+  '3\-D': 3D
+  'Google (?:I\-O|IO)': Google I/O
+  "tap (?:&|and) hold": touch & hold
+  "un(?:check|select)": clear
+  above: preceding
+  account name: username
+  action bar: app bar
+  admin: administrator
+  a\.k\.a|aka: or|also known as
+  application: app
+  approx\.: approximately
+  autoupdate: automatically update
+  cellular data: mobile data
+  cellular network: mobile network
+  chapter: documents|pages|sections
+  check box: checkbox
+  click on: click|click in
+  content type: media type
+  curated roles: predefined roles
+  data are: data is
+  disabled?: turn off|off
+  ephemeral IP address: ephemeral external IP address
+  fewer data: less data
+  file name: filename
+  firewalls: firewall rules
+  functionality: capability|feature
+  grayed-out: unavailable
+  in order to: to
+  ingest: import|load
+  long press: touch & hold
+  network IP address: internal IP address
+  omnibox: address bar
+  open-source: open source
+  overview screen: recents screen
+  regex: regular expression
+  sign into: sign in to
+  '(?<!single )sign-?on': single sign-on
+  static IP address: static external IP address
+  stylesheet: style sheet
+  synch: sync
+  tablename: table name
+  tablet: device
+  'touch(?! ?(?:&|and) hold)': tap
+  vs\.: versus

src/devx/molecule/molecule_ci_guard.py

@@ -125,6 +125,11 @@ def build_env_for_pair(pair: str, base_env: dict[str, str]) -> dict[str, str]:
     """Build environment for a single molecule pair."""
     _role, _scenario, platform_name, platform_image, platform_command = parse_pair(pair)
     env = base_env.copy()
+    # Append runner index to platform name when running in CI matrix to avoid
+    # Docker container name conflicts when multiple runners share the same Docker host.
+    matrix_index = env.get("MATRIX_INDEX")
+    if matrix_index:
+        platform_name = f"{platform_name}-r{matrix_index}"
     env["MOLECULE_PLATFORM_NAME"] = platform_name
     env["MOLECULE_PLATFORM_IMAGE"] = platform_image
     if platform_command:

tests/unit/test_molecule_ci_guard.py

@@ -102,6 +102,16 @@ class TestBuildEnvForPair:
         env = build_env_for_pair("default|ubuntu-2204|img:latest|", {"MOLECULE_HOME": "/custom/home"})
         assert env["MOLECULE_HOME"] == "/custom/home"
 
+    def test_appends_matrix_index_to_platform_name(self) -> None:
+        """When MATRIX_INDEX is set, platform name gets a unique suffix."""
+        env = build_env_for_pair("default|ubuntu-2604|img:latest|sleep infinity", {"MATRIX_INDEX": "3"})
+        assert env["MOLECULE_PLATFORM_NAME"] == "ubuntu-2604-r3"
+
+    def test_no_matrix_index_keeps_platform_name(self) -> None:
+        """Without MATRIX_INDEX, platform name is unchanged."""
+        env = build_env_for_pair("default|ubuntu-2604|img:latest|sleep infinity", {})
+        assert env["MOLECULE_PLATFORM_NAME"] == "ubuntu-2604"
+
 
 class TestPollForOtherFailures:
     def test_sets_failed_event_when_other_runner_fails(self) -> None: