diff --git a/CHANGELOG.md b/CHANGELOG.md
index 75684a8fe6..d4b10cb006 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15642,6 +15642,7 @@ with **180 merged pull requests** since the first 2.0 milestone tag.
 [#7017]: https://github.com/bytedance/deer-flow/pull/7017
 [#7018]: https://github.com/bytedance/deer-flow/pull/7018
 [#7020]: https://github.com/bytedance/deer-flow/pull/7020
+[#7022]: https://github.com/bytedance/deer-flow/issues/7022
 [#7023]: https://github.com/bytedance/deer-flow/pull/7023
 [#7024]: https://github.com/bytedance/deer-flow/pull/7024
 [#7031]: https://github.com/bytedance/deer-flow/pull/7031
diff --git a/CHANGELOG_zh.md b/CHANGELOG_zh.md
index 0cc6326a22..85717a9887 100644
--- a/CHANGELOG_zh.md
+++ b/CHANGELOG_zh.md
@@ -12413,6 +12413,7 @@ DeerFlow 2.0 是围绕"超级智能体"框架的彻底重写，核心包含子
 [#7017]: https://github.com/bytedance/deer-flow/pull/7017
 [#7018]: https://github.com/bytedance/deer-flow/pull/7018
 [#7020]: https://github.com/bytedance/deer-flow/pull/7020
+[#7022]: https://github.com/bytedance/deer-flow/issues/7022
 [#7023]: https://github.com/bytedance/deer-flow/pull/7023
 [#7024]: https://github.com/bytedance/deer-flow/pull/7024
 [#7031]: https://github.com/bytedance/deer-flow/pull/7031
diff --git a/backend/tests/test_changelog_reference_links.py b/backend/tests/test_changelog_reference_links.py
new file mode 100644
index 0000000000..62aea8b96e
--- /dev/null
+++ b/backend/tests/test_changelog_reference_links.py
@@ -0,0 +1,70 @@
+"""The change logs must render every ``[#1234]`` mention as a link.
+
+Both change logs list pull requests with reference-style links: the entry text
+carries ``[#1234]`` and a ``[#1234]: <url>`` line at the bottom supplies the
+target. A missing definition renders as the literal characters ``[#1234]``, and a
+definition whose number or repository differs from its key silently points at a
+different page. Neither is visible while reviewing an entry, so pin both here.
+
+These checks read the two files only — no network, no fixtures.
+"""
+
+from __future__ import annotations
+
+import re
+from pathlib import Path
+
+import pytest
+
+REPO_ROOT = Path(__file__).resolve().parents[2]
+CHANGELOGS = ("CHANGELOG.md", "CHANGELOG_zh.md")
+
+_DEFINITION = re.compile(r"^\[\s*#?(?P<key>\d+)\s*\]:\s*(?P<url>\S+)\s*$")
+# ``[#1234]`` used as reference text. A following ``(`` or ``[`` makes it an
+# inline link (``[#1234](url)``), which needs no definition.
+_REFERENCE = re.compile(r"\[#(\d+)\](?![\[(])")
+_SAME_REPO_TARGET = re.compile(r"^https://github\.com/bytedance/deer-flow/(?:pull|issues)/(?P<number>\d+)$")
+_COMMIT_PERMALINK = re.compile(r"^https://github\.com/bytedance/deer-flow/commit/[0-9a-f]{40}$")
+
+
+def _scan(path: Path) -> tuple[set[int], dict[int, str]]:
+    """Return the ``[#n]`` tokens used in prose and the ``[#n]:`` definitions."""
+    used: set[int] = set()
+    defined: dict[int, str] = {}
+    in_fence = False
+    for line in path.read_text(encoding="utf-8").splitlines():
+        stripped = line.strip()
+        if stripped.startswith("```"):
+            in_fence = not in_fence
+            continue
+        definition = _DEFINITION.match(stripped)
+        if definition:
+            defined[int(definition.group("key"))] = definition.group("url")
+            continue
+        if in_fence:
+            continue
+        used.update(int(match.group(1)) for match in _REFERENCE.finditer(line))
+    return used, defined
+
+
+@pytest.mark.parametrize("changelog", CHANGELOGS)
+def test_every_reference_mention_has_a_definition(changelog: str) -> None:
+    used, defined = _scan(REPO_ROOT / changelog)
+
+    missing = sorted(used - set(defined))
+    assert not missing, f"{changelog} mentions {['#' + str(n) for n in missing]} as [#n] reference text without a '[#n]: <url>' definition, so it renders as literal text."
+
+
+@pytest.mark.parametrize("changelog", CHANGELOGS)
+def test_definitions_target_their_own_number_in_this_repository(changelog: str) -> None:
+    _, defined = _scan(REPO_ROOT / changelog)
+
+    drifted = []
+    for number, url in defined.items():
+        same_repo = _SAME_REPO_TARGET.match(url)
+        if same_repo is not None:
+            if int(same_repo.group("number")) != number:
+                drifted.append(f"[#{number}]: {url}")
+        elif _COMMIT_PERMALINK.match(url) is None:
+            drifted.append(f"[#{number}]: {url}")
+    assert not drifted, f"{changelog} defines a reference outside bytedance/deer-flow, or aimed at a different number than its key: {drifted[:5]}"