diff --git a/templates/commands/specify.md b/templates/commands/specify.md
index e32fd48971..54151e8b42 100644
--- a/templates/commands/specify.md
+++ b/templates/commands/specify.md
@@ -139,9 +139,9 @@ Given that feature description, do this:
     7. Identify Key Entities (if data involved)
     8. Return: SUCCESS (spec ready for planning)
 
-6. Write the specification to SPEC_FILE using the template structure, replacing placeholders with concrete details derived from the feature description (arguments) while preserving section order and headings.
+7. Write the specification to SPEC_FILE using the template structure, replacing placeholders with concrete details derived from the feature description (arguments) while preserving section order and headings.
 
-7. **Specification Quality Validation**: After writing the initial spec, validate it against quality criteria:
+8. **Specification Quality Validation**: After writing the initial spec, validate it against quality criteria:
 
    a. **Create Spec Quality Checklist**: Generate a checklist file at `SPECIFY_FEATURE_DIRECTORY/checklists/requirements.md` using the checklist template structure with these validation items:
 
diff --git a/tests/test_specify_template_numbering.py b/tests/test_specify_template_numbering.py
new file mode 100644
index 0000000000..21b50fb624
--- /dev/null
+++ b/tests/test_specify_template_numbering.py
@@ -0,0 +1,59 @@
+"""Regression test for duplicate top-level step numbers in specify.md.
+
+Covers #2407: two consecutive items were both labelled ``6.``, which caused
+a self-referencing ``proceed to step 7`` inside the section already numbered 7.
+"""
+
+import re
+from pathlib import Path
+
+REPO_ROOT = Path(__file__).parent.parent
+SPECIFY_MD = REPO_ROOT / "templates" / "commands" / "specify.md"
+
+
+def _main_execution_ordinals(text: str) -> list[int]:
+    """Return ordinals from the main execution list (items 1-N at column 0).
+
+    The file contains several distinct numbered lists; we only care about the
+    primary execution steps that span the first ~250 lines and whose first item
+    starts with ``1. **Generate``.
+    """
+    ordinals: list[int] = []
+    in_main_list = False
+    for line in text.splitlines():
+        m = re.match(r"^(\d+)\. ", line)
+        if m:
+            n = int(m.group(1))
+            if n == 1 and not in_main_list:
+                # Start of the main execution list
+                in_main_list = True
+                ordinals = [n]
+            elif in_main_list:
+                if n == 1:
+                    # A new list restarts — stop here
+                    break
+                ordinals.append(n)
+    return ordinals
+
+
+def test_no_duplicate_top_level_ordinals():
+    """The main numbered list in specify.md must have no duplicate ordinals."""
+    text = SPECIFY_MD.read_text(encoding="utf-8")
+    ordinals = _main_execution_ordinals(text)
+    duplicates = [n for n in ordinals if ordinals.count(n) > 1]
+    assert not duplicates, (
+        f"Duplicate top-level ordinals found in templates/commands/specify.md: "
+        f"{sorted(set(duplicates))}"
+    )
+
+
+def test_main_execution_list_is_sequential():
+    """The main execution steps must run 1, 2, 3, … without gaps or duplicates."""
+    text = SPECIFY_MD.read_text(encoding="utf-8")
+    ordinals = _main_execution_ordinals(text)
+    assert ordinals, "Could not find the main execution list in specify.md"
+    expected = list(range(1, len(ordinals) + 1))
+    assert ordinals == expected, (
+        f"Main execution steps are not sequential in templates/commands/specify.md. "
+        f"Got: {ordinals}, expected: {expected}"
+    )