docs: correct stale comments and the nav type alias

The social plugin is not handled by the scripts under scripts/docs/ — it was
dropped (Zensical has no social-card support; the cards were gated on an env
var no workflow set). The NavItem alias excluded the {title: url} page shape
it mostly holds.

Author: maxisbey

.gitignore

@@ -144,7 +144,7 @@ venv.bak/
 # documentation
 /site
 /.worktrees/
-# Generated at build time by docs/hooks/ (the API reference tree and the
+# Generated at build time by scripts/docs/ (the API reference tree and the
 # concrete Zensical config spliced from mkdocs.yml).
 /docs/api/
 /mkdocs.gen.yml

mkdocs.yml

@@ -11,7 +11,7 @@ site_url: https://py.sdk.modelcontextprotocol.io/v2/
 
 # The "API Reference" entry is a placeholder: `scripts/docs/gen_ref_pages.py`
 # generates the `docs/api/` tree and `scripts/docs/build_config.py` splices the
-# real nested nav in before the build. See `scripts/build-docs.sh`.
+# real nested nav in before the build. See `scripts/docs/build.sh`.
 nav:
   - MCP Python SDK: index.md
   - "What's new in v2": whats-new.md
@@ -165,9 +165,11 @@ markdown_extensions:
   - sane_lists # this means you can start a list from any number
 
 # Zensical natively re-implements `search`, `glightbox` and `mkdocstrings`; it
-# does not run arbitrary MkDocs plugins or hooks, so the former `gen-files`,
-# `literate-nav`, `social` and `llms_txt` hook are handled by the standalone
-# scripts under `scripts/docs/` invoked around the build (see build-docs.sh).
+# does not run arbitrary MkDocs plugins or hooks. The former `gen-files`,
+# `literate-nav` and `llms_txt` hook are handled by the standalone scripts
+# under `scripts/docs/` (see scripts/docs/build.sh). The `social` plugin was
+# dropped: Zensical has no social-card support, and the cards were gated on
+# ENABLE_SOCIAL_CARDS, which no workflow ever set.
 plugins:
   - search
   - glightbox

scripts/docs/gen_ref_pages.py

@@ -18,8 +18,7 @@
 # A MkDocs/Zensical nav is a list of entries, each either ``{title: url}`` for a
 # page or ``{title: [children]}`` for a section (a bare ``url`` string attaches
 # a section index page, courtesy of the ``navigation.indexes`` feature).
-NavItem = "str | dict[str, NavList]"
-NavList = "list[NavItem]"
+NavItem = "str | dict[str, str | list[NavItem]]"
 
 ROOT = Path(__file__).parent.parent.parent
 API_DIR = ROOT / "docs" / "api"
@@ -39,15 +38,15 @@ def to_nav(self, title: str) -> NavItem:
         if not self.children:
             assert self.url is not None
             return {title: self.url}
-        items: NavList = []
+        items: list[NavItem] = []
         if self.url is not None:
             items.append(self.url)
         for name in sorted(self.children):
             items.append(self.children[name].to_nav(name))
         return {title: items}
 
 
-def generate() -> NavList:
+def generate() -> list[NavItem]:
     """Write ``docs/api/**.md`` stubs and return the API-section navigation."""
     if API_DIR.exists():
         shutil.rmtree(API_DIR)