diff --git a/AUDIT.md b/AUDIT.md
index 96977dc1..fac1abe3 100644
--- a/AUDIT.md
+++ b/AUDIT.md
@@ -95,7 +95,7 @@ Run [`WORKFLOW.md`][workflow]'s methodology against the repo's **own** Actions:
 
 - **General settings** - diff the live repository settings against [`repo-config/settings.json`][repo-config-settings], and confirm the two state-dependent settings: `has_discussions` follows visibility (public on / private off) and `default_branch` is `main`.
 
-  ```sh
+  ```bash
   live=$(gh api "repos/<owner>/<repo>" --jq '{has_wiki,has_projects,allow_merge_commit,allow_squash_merge,allow_rebase_merge,allow_auto_merge,allow_update_branch,delete_branch_on_merge}')
   diff <(jq -S . repo-config/settings.json) <(jq -S . <<<"$live") \
     && echo "settings: in sync" || echo "settings: DRIFT"
@@ -103,7 +103,7 @@ Run [`WORKFLOW.md`][workflow]'s methodology against the repo's **own** Actions:
 
 - **Rulesets** - diff each live ruleset against the committed expected payload with a normalized comparison (sort the order-insensitive `rules[]` on each rule's whole content before diffing, so a reordered but equivalent ruleset does not read as drift). The compared subset is `name`, `target`, `enforcement`, `conditions` and `rules`, and `bypass_actors` sits deliberately outside it, which is the same subset and the same sort key [`spec/audit.py`][audit-runner] uses. Who may bypass a ruleset is a per-repository human decision taken in the UI, no payload declares one, and [`repo-config/configure.sh`][repo-config] treats it that way in both modes, writing the live list back unchanged on `apply` and reporting it without asserting on `check`. Comparing it here would contradict that and report a ruleset finding against every repository that has any bypass actor, which is the field's normal state rather than a deviation:
 
-  ```sh
+  ```bash
   # bypass_actors stays outside the projection, since no payload declares one and jq cannot sort the null that leaves.
   # Rules sort on each rule's whole content, matching the key normalize_ruleset in audit.py sorts by.
   # Sorting on .type alone leaves two rules of one type in input order, so a reordered pair would read as drift.
@@ -135,7 +135,7 @@ Run [`WORKFLOW.md`][workflow]'s methodology against the repo's **own** Actions:
 
 - **Dependabot ecosystem coverage** - for each ecosystem the repo's tree implies, `.github/dependabot.yml` must declare it: `github-actions` when `.github/workflows/` is present (its workflows reference actions, and otherwise those versions go stale and a stood-up merge-bot has no action-update PRs to auto-merge), and `devcontainers` when a `.devcontainer` is present. The mechanical check (`spec/audit.py`) asserts each implied ecosystem's **presence**. A tree-implied ecosystem declared nowhere is a **drift finding** (the file exists, so its absence would instead be a file-presence letter). Then confirm **by inspection** that each declared ecosystem **dual-targets `main` + `develop`** per the [Branching Model][governance-branching-model], since the regex below cannot pair an ecosystem with its `target-branch`. Language ecosystems (`nuget`/`uv`/`npm`) are directory-scoped and audited by inspection too.
 
-  ```sh
+  ```bash
   # Anchor to the line start (optional list dash) so a commented-out '# package-ecosystem:' is not counted.
   dependabot_content=$(gh api "repos/<owner>/<repo>/contents/.github/dependabot.yml?ref=<ground>" --jq '.content') || exit 1
   dependabot_yaml=$(base64 -d <<<"$dependabot_content") || exit 1
diff --git a/scripts/tests/test_release_guards.py b/scripts/tests/test_release_guards.py
index 134eb06b..b6e19fe0 100644
--- a/scripts/tests/test_release_guards.py
+++ b/scripts/tests/test_release_guards.py
@@ -59,6 +59,31 @@ def test_audit_probes_fail_before_local_path_checks(self) -> None:
             audit,
         )
 
+    def test_audit_bash_blocks_are_not_labeled_as_posix_shell(self) -> None:
+        audit_lines = (REPO / "AUDIT.md").read_text(encoding="utf-8").splitlines()
+        bash_only = ("<(", "<<<", "$'", "[[")
+        mislabeled = []
+        fence_label = ""
+        fence_start = 0
+        fence_lines: list[str] = []
+
+        for number, line in enumerate(audit_lines, start=1):
+            stripped = line.strip()
+            if not fence_label and stripped.startswith("```"):
+                fence_label = stripped.removeprefix("```").split(maxsplit=1)[0]
+                fence_start = number
+            elif fence_label and stripped == "```":
+                if fence_label in {"sh", "shell"} and any(
+                    token in "\n".join(fence_lines) for token in bash_only
+                ):
+                    mislabeled.append((fence_start, fence_label))
+                fence_label = ""
+                fence_lines = []
+            elif fence_label:
+                fence_lines.append(line)
+
+        self.assertEqual([], mislabeled)
+
 
 if __name__ == "__main__":
     unittest.main()