fix sup: tags to use human-readable YEAR_PFS_{FR|PR|CR} slugs instead of opaque item keys

src/bib/spider.py

@@ -32,7 +32,7 @@ from typing import TYPE_CHECKING
 
 from bib import translate
 from bib.item import Source
-from bib.tag import Tag
+from bib.tag import Tag, rule_slug
 
 if TYPE_CHECKING:
     from bib.store import Store
@@ -304,12 +304,14 @@ def _translate_url(url: str) -> Source | None:
     return None
 
 
-def _link_existing(store: Store, url: str, parent_key: str) -> None:
-    """Add a ``sup:{parent_key}`` tag to an existing item by URL."""
+def _link_existing(store: Store, url: str, parent_slug: str) -> None:
+    """Add a ``sup:{slug}`` tag to an existing item by URL."""
+    if not parent_slug:
+        return
     con = store._con()
     row = con.execute("SELECT key FROM items WHERE url = ?", (url,)).fetchone()
     if row:
-        store.add_tag(row["key"], Tag.sup(parent_key).label)
+        store.add_tag(row["key"], Tag.sup(parent_slug).label)
 
 
 # ── Main crawl ────────────────────────────────────────────────────
@@ -385,7 +387,9 @@ def crawl(
     for t in item.tags:
         if t.startswith("module:") or t.startswith("year:"):
             inherit_tags.append(Tag.from_label(t))
-    inherit_tags.append(Tag.sup(key))
+    slug = rule_slug(item.title)
+    if slug:
+        inherit_tags.append(Tag.sup(slug))
     inherit_tags.append(Tag.source("spider"))
 
     sup_col = _get_sup_collection(store, item)
@@ -393,7 +397,7 @@ def crawl(
     discovered: list[str] = []
     for url in all_urls:
         if url in _seen:
-            _link_existing(store, url, key)
+            _link_existing(store, url, slug)
             continue
         _seen.add(url)
 

src/bib/tag.py

@@ -33,6 +33,11 @@ Namespaces
     ``file:rvu``, ``file:gpci``, ``file:pe-labor``,
     ``file:pe-supply``, ``file:pe-equipment``, ``file:carrier``
 
+``sup``
+    Supplemental link to a parent rule using a human-readable
+    slug (``YEAR_ASSET_VERSION``):
+    ``sup:2023_PFS_PR``, ``sup:2026_PFS_FR``
+
 Usage::
 
     from bib.tag import Tag
@@ -53,6 +58,8 @@ Usage::
 
 from __future__ import annotations
 
+import re
+
 from pydantic import BaseModel
 
 
@@ -113,9 +120,40 @@ class Tag(BaseModel):
         return cls(namespace="file", value=file_type)
 
     @classmethod
-    def sup(cls, parent_key: str) -> Tag:
-        """Tag linking a supplemental item back to its parent."""
-        return cls(namespace="sup", value=parent_key)
+    def sup(cls, slug: str) -> Tag:
+        """Tag linking a supplemental item back to its parent rule.
+
+        Parameters
+        ----------
+        slug : str
+            Human-readable identifier, e.g. ``2023_PFS_PR``.
+            Use :func:`rule_slug` to derive from a rule title.
+        """
+        return cls(namespace="sup", value=slug)
+
+
+_RULE_KIND = {"Final": "FR", "Proposed": "PR", "Correction": "CR"}
+
+# Match "CY YYYY PFS Final Rule" (or Proposed/Correction)
+_RULE_RE = re.compile(r"CY\s+(\d{4})\s+PFS\s+(Final|Proposed|Correction)")
+
+
+def rule_slug(title: str) -> str:
+    """Derive a human-readable slug from a Federal Register rule title.
+
+    Examples::
+
+        >>> rule_slug("Medicare Program; CY 2023 PFS Proposed Rule")
+        '2023_PFS_PR'
+        >>> rule_slug("Medicare Program; CY 2017 PFS Final Rule")
+        '2017_PFS_FR'
+        >>> rule_slug("Something else entirely")
+        ''
+    """
+    m = _RULE_RE.search(title)
+    if not m:
+        return ""
+    return f"{m.group(1)}_PFS_{_RULE_KIND[m.group(2)]}"
 
 
 def filter_tags(