docs(standards): rebase cross-kind wiki links via MkDocs hook

The standards wiki links to the sibling library reference with ../lib/... paths. Add src/hooks.py and enable it in mkdocs.wiki.yml so those links climb to the repo root and resolve to /standards/lib/... under directory URLs.

standards/src/hooks.py

@@ -0,0 +1,36 @@
+"""MkDocs hook: rebase cross-kind links to the repository root.
+
+The standards wiki links to the sibling library reference with
+source-relative paths such as ``../lib/13_library_registry/``. MkDocs only
+rewrites links whose target lives inside ``docs_dir``, so those links are
+emitted verbatim and, under ``use_directory_urls``, resolve into
+``/standards/wiki/lib/...`` and break.
+
+This hook rewrites ``../lib/``, ``../api/`` and ``../wiki/`` links to climb to
+the repository root, so they resolve to ``/<repo>/<kind>/`` regardless of how
+deeply the page is nested. It mirrors the ``docforge-linkfix`` MkDocs plugin.
+"""
+
+from __future__ import annotations
+
+import re
+
+_CROSS_KIND_LINK = re.compile(r"\]\((?:\.\./)+(lib|api|wiki)/")
+
+
+def on_page_markdown(markdown, *, page, config, files):
+    """Prefix cross-kind links with the depth required to reach the repo root.
+
+    Args:
+        markdown (str): The raw Markdown source of the current page.
+        page: The page being rendered; its destination URI determines how many
+            directory levels the output sits below the site root.
+        config: The active MkDocs configuration (unused).
+        files: The collection of files in the site (unused).
+
+    Returns:
+        str: The Markdown with cross-kind links rebased to the repo root.
+    """
+    depth = page.file.dest_uri.count("/")
+    prefix = "../" * (depth + 1)
+    return _CROSS_KIND_LINK.sub(lambda match: f"]({prefix}{match.group(1)}/", markdown)

standards/src/mkdocs.wiki.yml

@@ -4,6 +4,9 @@ docs_dir: wiki
 site_dir: ../wiki
 use_directory_urls: true
 
+hooks:
+  - hooks.py
+
 theme:
   name: material
   palette: