diff --git a/.github/ISSUE_TEMPLATE/bug_report.yml b/.github/ISSUE_TEMPLATE/bug_report.yml
index 3834b79d6..acde630ef 100644
--- a/.github/ISSUE_TEMPLATE/bug_report.yml
+++ b/.github/ISSUE_TEMPLATE/bug_report.yml
@@ -26,6 +26,18 @@ body:
         - label: I am running the latest code from the `dev` branch (the default branch you get on clone, where fixes land first) and the bug still reproduces there. Please `git pull` the latest `dev` before filing.
           required: true
 
+  - type: input
+    id: revision
+    attributes:
+      label: Odysseus Revision
+      description: |
+        From the repository root (on the host when using Docker), run
+        `git show -s --abbrev=12 --format='%h (%cs)' HEAD`
+        and paste the output exactly.
+      placeholder: "1fef4929cf1d (2026-08-11)"
+    validations:
+      required: true
+
   - type: dropdown
     id: install-method
     attributes:
diff --git a/.github/scripts/check-issue-description.js b/.github/scripts/check-issue-description.js
index 63162b0d7..2c96de122 100644
--- a/.github/scripts/check-issue-description.js
+++ b/.github/scripts/check-issue-description.js
@@ -41,6 +41,14 @@ module.exports = async ({ github, context, core }) => {
       break;
 
     case 'bug': {
+      const revisionText = section('Odysseus Revision');
+      if (!/^[0-9a-f]{12} \(\d{4}-\d{2}-\d{2}\)$/i.test(revisionText)) {
+        failures.push(
+          '**Odysseus Revision** — paste the 12-character commit SHA and date, ' +
+          'for example `1fef4929cf1d (2026-08-11)`',
+        );
+      }
+
       if (!section('Install Method')) {
         failures.push('**Install Method** — select how you installed Odysseus');
       }
diff --git a/tests/test_issue_description_check.py b/tests/test_issue_description_check.py
index 196f21cfc..ed52e429c 100644
--- a/tests/test_issue_description_check.py
+++ b/tests/test_issue_description_check.py
@@ -6,10 +6,12 @@ import subprocess
 from pathlib import Path
 
 import pytest
+import yaml
 
 
 _REPO = Path(__file__).resolve().parent.parent
 _CHECKER = _REPO / ".github" / "scripts" / "check-issue-description.js"
+_BUG_TEMPLATE = _REPO / ".github" / "ISSUE_TEMPLATE" / "bug_report.yml"
 _WORKFLOW = _REPO / ".github" / "workflows" / "issue-description-check.yml"
 pytestmark = pytest.mark.skipif(not shutil.which("node"), reason="node not on PATH")
 
@@ -66,11 +68,114 @@ checkIssueDescription({ github, context, core })
     return json.loads(proc.stdout)
 
 
+def _run_bug_issue(revision):
+    body = f"""# Odysseus Revision
+{revision}
+
+# Install Method
+Docker
+
+# Operating System
+Linux
+
+# Steps to Reproduce
+1. Start Odysseus.
+
+# Expected Behaviour
+The application starts normally.
+
+# Actual Behaviour
+The application exits unexpectedly.
+"""
+    harness = r"""
+const checkIssueDescription = require(process.argv[1]);
+const body = process.argv[2];
+const calls = [];
+
+const github = {
+  rest: {
+    issues: {
+      removeLabel: async (params) => calls.push({ method: 'removeLabel', params }),
+      getLabel: async () => ({}),
+      addLabels: async (params) => calls.push({ method: 'addLabels', params }),
+      listComments: async () => ({ data: [] }),
+      createComment: async (params) => calls.push({ method: 'createComment', params }),
+      updateComment: async (params) => calls.push({ method: 'updateComment', params }),
+      deleteComment: async (params) => calls.push({ method: 'deleteComment', params }),
+    },
+  },
+};
+const context = {
+  payload: {
+    action: 'opened',
+    issue: { number: 42, state: 'open', body, labels: [{ name: 'bug' }] },
+  },
+  repo: { owner: 'odysseus-dev', repo: 'odysseus' },
+};
+const core = {
+  warning: (message) => calls.push({ method: 'warning', message }),
+  setFailed: (message) => calls.push({ method: 'setFailed', message }),
+};
+
+checkIssueDescription({ github, context, core })
+  .then(() => process.stdout.write(JSON.stringify(calls)))
+  .catch((error) => {
+    console.error(error);
+    process.exitCode = 1;
+  });
+"""
+    proc = subprocess.run(
+        ["node", "-e", harness, str(_CHECKER), body],
+        capture_output=True,
+        text=True,
+        cwd=str(_REPO),
+        timeout=30,
+    )
+    assert proc.returncode == 0, proc.stderr
+    return json.loads(proc.stdout)
+
+
 def test_workflow_handles_issue_closures():
     workflow = _WORKFLOW.read_text()
     assert "types: [opened, edited, reopened, closed]" in workflow
 
 
+def test_bug_template_requires_exact_revision():
+    template = yaml.safe_load(_BUG_TEMPLATE.read_text())
+    revision = next(item for item in template["body"] if item.get("id") == "revision")
+    assert revision["type"] == "input"
+    assert revision["attributes"]["label"] == "Odysseus Revision"
+    assert "git show -s --abbrev=12 --format='%h (%cs)' HEAD" in revision["attributes"]["description"]
+    assert revision["attributes"]["placeholder"] == "1fef4929cf1d (2026-08-11)"
+    assert revision["validations"]["required"] is True
+
+
+def test_bug_checker_accepts_exact_revision():
+    calls = _run_bug_issue("1fef4929cf1d (2026-08-11)")
+    assert not any(call["method"] in {"createComment", "setFailed"} for call in calls)
+    assert any(
+        call["method"] == "addLabels" and call["params"]["labels"] == ["ready for review"]
+        for call in calls
+    )
+
+
+@pytest.mark.parametrize(
+    "revision",
+    [
+        "",
+        "1fef492",
+        "1fef4929cf1d",
+        "1fef4929cf1d (11 August 2026)",
+        "1fef4929cf1d (2026-08-11) extra",
+    ],
+)
+def test_bug_checker_rejects_missing_or_malformed_revision(revision):
+    calls = _run_bug_issue(revision)
+    comment = next(call["params"]["body"] for call in calls if call["method"] == "createComment")
+    assert "**Odysseus Revision**" in comment
+    assert any(call["method"] == "setFailed" for call in calls)
+
+
 @pytest.mark.parametrize("action", ["closed", "edited"])
 def test_closed_issue_only_drops_ready_for_review(action):
     assert _run_closed_issue(action) == [