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diff --git a/scripts/gen-deutero.py b/scripts/gen-deutero.py
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+#!/usr/bin/env python3
+# gen-deutero.py -- backfill the deuterocanonical Daniel and Esther additions
+# that the base drb (Douay-Rheims) corpus omits: Daniel 13 (Susanna) & 14 (Bel
+# and the Dragon), and the Greek additions to Esther (chapters 11-16). The base
+# corpus used Hebrew-canon chapter counts (Daniel 1-12, Esther 1-10) even though
+# the Douay-Rheims itself carries these chapters; the EF Lenten lectionary reads
+# them (e.g. Susanna on Saturday of the 3rd week of Lent), so they are required.
+#
+# Source: get.bible v2 "douayrheims" (public domain). Latin (vul) already has
+# them; the Polish Wujek source (biblia.info.pl) uses the truncated 12-chapter
+# Daniel, so wuj cannot be filled from the existing pipeline (Latin fallback
+# covers Polish).
+#
+# Usage (from repo root):
+#   python3 scripts/gen-deutero.py            # print the rows (inspect)
+#   python3 scripts/gen-deutero.py --apply    # append to drb.tsv if not present
+#
+# Row format matches the corpus: Book\tAbbrev\tBookNum\tChapter\tVerse\tText
+import json, sys, urllib.request
+
+DRB = "internal/bible/corpora/drb.tsv"
+# (canonical book name, abbrev, book-number, [chapters]) -- must match drb.tsv.
+TARGETS = [
+    ("Daniel", "Dan", 27, range(13, 15)),   # 13 Susanna, 14 Bel & the Dragon
+    ("Esther", "Est", 17, range(11, 17)),   # 11-16 Greek additions
+]
+
+def get(url):
+    req = urllib.request.Request(url, headers={"User-Agent": "curl/8.0"})
+    with urllib.request.urlopen(req, timeout=25) as r:
+        return json.load(r)
+
+def rows():
+    out = []
+    for name, abbr, nr, chapters in TARGETS:
+        for ch in chapters:
+            d = get(f"https://api.getbible.net/v2/douayrheims/{nr}/{ch}.json")
+            for v in d.get("verses", []):
+                text = " ".join(v["text"].split())  # collapse whitespace, no tabs/newlines
+                out.append(f"{name}\t{abbr}\t{nr}\t{ch}\t{v['verse']}\t{text}")
+    return out
+
+def main():
+    apply = "--apply" in sys.argv[1:]
+    new = rows()
+    if not apply:
+        for r in new:
+            print(r)
+        print(f"# {len(new)} rows (not written; pass --apply to append)", file=sys.stderr)
+        return
+    existing = open(DRB, encoding="utf-8").read()
+    if "\nDaniel\tDan\t27\t13\t" in existing:
+        print("drb.tsv already has Daniel 13 -- refusing to duplicate", file=sys.stderr)
+        sys.exit(1)
+    with open(DRB, "a", encoding="utf-8") as f:
+        if not existing.endswith("\n"):
+            f.write("\n")
+        f.write("\n".join(new) + "\n")
+    print(f"appended {len(new)} rows to {DRB}", file=sys.stderr)
+
+if __name__ == "__main__":
+    main()