diff --git a/TESTING.md b/TESTING.md
index 12d9dc87..f81916ab 100644
--- a/TESTING.md
+++ b/TESTING.md
@@ -2594,7 +2594,8 @@ Category". It is built only from the concept's Images parts:
   input[type=checkbox]`); Home, End and the arrow keys still move between titles.
 - `div#library-bulkbar` sits between the toolbar and the caption, empty until something
   is checked, then the concept's `.bulkbar`: "N selected", Set category, Clear (D151
-  adds Add tags before Set category, in the Images bar's order). The
+  adds Add tags before Set category, in the Images bar's order; D152 adds Delete… before
+  Clear, and Restore alone on the archived shelf). The
   selection is a set of prompt ids over the loaded shelf: windowed-out cards keep their
   state, Load more keeps it, and any shelf reload (search, category, sort, tags, a
   write) and leaving the page clear it. Clicking a checkbox toggles it and sets the
@@ -2675,6 +2676,97 @@ during a write); `tests/browser/library-concept.spec.mjs` (the bar comparison no
 Add tags); units `tests/js/workspace-library-selection.test.js`; Python
 `tests/test_bulk_library_tags.py`. A Python change: ComfyUI needs a restart.
 
+### Deleting and archiving selected prompts (#443)
+
+**D152** (beyond the concept, on D148's bar; the concept archives a prompt from its recipe
+editor's "Archive…", `app.js` 976, reviewed in `maintenancePlan`, 953–958, and maps the legacy
+delete to a "reference-safe archive", 783): the Prompt library deletes or archives the
+selected prompts in one reviewed step, replacing the legacy admin page's bulk and single
+Delete, which refuses a whole batch when any prompt belongs to a saved pair (maintainer
+rulings of 2026-10-28):
+
+- The bar reads "N selected", [Select all N loaded], Add tags, Set category, **Delete…**
+  (the concept's `danger` class, as its Images bar's "Remove links…"), Clear.
+- Delete… posts `{prompt_ids, expected_epoch}` to `POST
+  /prompt_manager/library/delete/preview`, which classifies each id in this order: not
+  found (missing or not a Library parent), protected (tagged `__protected__`), already
+  archived, archive (the positive or negative of any saved pair, archived pair or not),
+  delete (everything else). From the press until the review opens, every bar action, Clear
+  too, is `aria-disabled` and Delete… reads "Reviewing…" (a double press sends one preview).
+- The review is the shared record-changing review (`openReviewDialog`), titled "Delete
+  selected prompts", "Archive selected prompts" or "Delete or archive selected prompts", its
+  `dl.meta-grid` rows Delete permanently ("N prompts not in a saved pair") and Archive ("N prompts in a saved
+  pair: hidden, restorable", never negative variants: a pair's prompt with none is archived too) (always), Protected (kept) with up to
+  three titles, Already archived, No longer exist, and, when something is deleted, Image
+  links removed and Backup ("Create and verify before deleting", or "Off: no safety backup
+  (System › Backup & export › Recovery policy)"); then `p.small` sentences: why paired
+  prompts are archived and how to restore them, what a delete removes and that it cannot be
+  undone except by restoring the safety backup (which returns the whole library to that
+  moment; kept among the last 10), that a later scan, new image or node run with the same
+  text adds a deleted prompt again, and how to unprotect. The primary is `danger`: "Delete D
+  prompts", "Archive A prompts" or "Delete D and archive A prompts". When nothing can change,
+  or the disk has no room for the promised backup, the review is close-only with the reason.
+  The concept's "Review maintenance plan" title, its demo note, Scope/Protected/Media on
+  disk rows and `ca-primary` start are replaced by these.
+- Start posts the reviewed lists `{archive_ids, delete_ids, expected_epoch, backup}` to `POST
+  /prompt_manager/library/delete` while Delete… reads "Deleting…" (or "Archiving…"). The
+  server takes a `records` hold ("Delete prompts (Library)", refused 409 `busy` beside a scan,
+  restore, maintenance, move or Optimize), checks the disk (507 `insufficient-space`) and,
+  when a delete remains and the reviewed `backup` was "on" or the policy is on now, takes a
+  verified safety backup (500 `backup-failed`, nothing changed). One `BEGIN IMMEDIATE`
+  transaction then deletes only reviewed deletes still unpaired whose prompt row, tags,
+  title and image links are unchanged since the backup (exactly the legacy rows: image
+  link rows, cascaded tags, Library state and pair links of images, released workflow
+  documents; files never), archives the paired ones and any reviewed delete now paired, and
+  counts the rest (`already_archived`, `not_found`, `changed`). Archiving writes a
+  `prompt_archive` row, the prompt's `updated_at` and, when its stored hash is stale or
+  missing and no other row holds the canonical one, the canonical hash, so scans, the
+  monitor and node saves find the archived row instead of adding a copy. A changed epoch
+  answers 409 `storage-changed`; nothing is written.
+- Outcomes: "Deleted D prompts." "Archived A prompts." with already archived, no longer
+  exist, changed and kept-protected sentences and "Safety backup saved: NAME (System ›
+  Backup & export)."; the shelf, categories, cached Library views and sidebar counts reload.
+  Storage restored: "The library was restored or moved since this page loaded. Nothing was
+  deleted or archived."; busy: "NAME is running. Nothing was changed; try again when it
+  finishes."; a failed backup or a short disk: the server's sentence; no answer, 502, 503 or
+  504: "The server did not confirm the change. The Library was reloaded: check the shelf and
+  Show archived prompts."; other refusals: "The selected prompts could not be changed. Try
+  again.", the selection kept.
+- **Show archived prompts (N)** (heading actions, before Export, `aria-pressed`; N the
+  archived prompts matching the filters, `archived_total`; the shelf counterpart of #235's
+  Show archived) lists only archived prompts (`GET /prompt_manager/library?shelf=archived`,
+  a cursor never crosses shelves), each card with an "Archived" `.chip`, the caption "N
+  archived prompts · M negative variants hidden with them", the bar "N selected", Restore,
+  Clear, and "No archived prompts." / "No archived prompts match." when empty. The pressed
+  state stays with the shelf visit, never in a saved view; Browse and a saved view open the
+  shelf. Restore posts `{prompt_ids, expected_epoch}` to `POST
+  /prompt_manager/library/restore` (every requested archived id, protected or not): "Restored
+  N prompts to the Prompt library."
+- An archived prompt's page shows the concept's `.notice` ("Archived" / "This prompt is archived
+  because it is in a saved pair. It and its N negative variants are hidden from the Prompt library; nothing was
+  removed.", or "It is hidden from…" when it has none) with Restore;
+  everything else on the page works. New prompt or Add negative on an archived prompt's
+  text keeps it archived and toasts "This text is an archived prompt. Restore it to show it
+  in the Prompt library again."
+- Archived prompts: hidden from the shelf, its search, `total`, the sidebar count, Tags &
+  categories' prompt counts (a value only archived prompts hold stays listed with 0) and
+  System › Overview and the restore review's positive counts; still counted by rename and
+  delete impacts and usage statistics; still shown as another prompt's negative variant, on
+  recorded runs and Images, by the legacy pages and the ComfyUI node's search; still reached
+  by run counting, scans and the monitor; never pruned by maintenance (a new protection,
+  "archived in the Library"); exported with `archived: true`. Older builds ignore the table
+  and show them again; the rows stay.
+- Deviation from legacy: a selected `__protected__` prompt is never deleted or archived (the
+  legacy delete removed it); it is listed in the review and the toast.
+
+Tests: `tests/browser/workspace-library-delete.spec.mjs` (mixed review and result on the
+server, Cancel, Show archived prompts and Restore from the bar and the notice, double press,
+failed backup, busy, unconfirmed, restore fence); `tests/browser/library-delete-concept.spec.mjs`
+(the review against the concept's `maintenancePlan`, the bar's Delete… against the concept's
+"Remove links…"); units `tests/js/workspace-library-delete.test.js`; Python
+`tests/test_prompt_archive_schema.py`, `tests/test_bulk_library_delete.py`,
+`tests/test_library_delete_routes.py`. A Python change: ComfyUI needs a restart.
+
 ### No 1–5 prompt rating in the workspace (#447)
 
 **D153** (maintainer ruling 2026-10-28: the star is only for favorites; the concept keeps
@@ -3899,8 +3991,8 @@ the per-section hand-off panel, was retired by S12 (#329): every section is nati
 - **D104** (Backup & export, S9, Q4): Recovery policy keeps the concept's "Proposed" chip.
   "Create a safety backup before maintenance" is the server's `safety_backup`
   (`maintenance.safety_backup`) policy. Its line says what it does ("Keep a verified copy
-  of the database on disk before maintenance, cleanups and LoRA imports change records. A
-  restore always keeps one."); the concept's "Preview a verified backup before applying
+  of the database on disk before maintenance, cleanups, LoRA imports and prompt deletes
+  change records. A restore always keeps one."); the concept's "Preview a verified backup before applying
   operations that change records." describes nothing the server does. It is drafted behind the Save row and saved with
   `expected_revision` (a configuration changed elsewhere is the conflict status); it is
   disabled with "Server settings could not be read." when the read failed. "Scheduled
diff --git a/database/library.py b/database/library.py
index 49f18ac9..25ba6247 100644
--- a/database/library.py
+++ b/database/library.py
@@ -7,6 +7,7 @@ from contextlib import contextmanager
 
 from .library_folders import folder_condition, list_library_folders
 from .library_tokens import library_edit_token
+from .prompt_archive import ARCHIVED, SHELVED
 
 _ELIGIBLE = """(EXISTS(SELECT 1 FROM prompt_pairs ep WHERE ep.positive_prompt_id=p.id)
  OR EXISTS(SELECT 1 FROM generated_images eg WHERE eg.prompt_id=p.id)
@@ -106,6 +107,12 @@ ARCHIVE_SCOPES = {
 }
 
 
+# Shelves (#443): the parents on the shelf, or the archived ones.
+PARENT_SCOPES = {"active": SHELVED, "archived": ARCHIVED}
+# A positive pair owner that is on the shelf, as a condition on alias pp.
+SHELVED_PAIR = SHELVED.replace("p.id", "pp.positive_prompt_id")
+
+
 def _escape(value: str) -> str:
     return value.replace("\\", "\\\\").replace("%", "\\%").replace("_", "\\_")
 
@@ -270,6 +277,8 @@ class LibraryOperations:
         rows = conn.execute(
             "SELECT p.id,p.text,ls.title,p.category,p.rating,p.notes,p.created_at,"
             "p.run_count,p.last_used_at,"
+            + ARCHIVED
+            + " AS archived,"
             + (f"{sort_expression} AS _sort," if sort_expression else "")
             + "(SELECT COUNT(*) FROM prompt_pairs v WHERE v.positive_prompt_id=p.id "
             "AND v.archived=0) AS variant_count,"
@@ -293,6 +302,7 @@ class LibraryOperations:
             # Usage is shown, never compared: the token hashes owner fields only.
             row["run_count"] = row["run_count"] if type(row["run_count"]) is int else 0
             row["last_used_at"] = utc_iso(row["last_used_at"])
+            row["archived"] = bool(row["archived"])
             row["edit_token"] = library_edit_token(epoch, row)
         return result
 
@@ -310,10 +320,13 @@ class LibraryOperations:
         sort: str = "newest",
         limit: int = 40,
         after: dict | None = None,
+        shelf: str = "active",
     ) -> dict:
         _limit(limit)
         if sort not in _ORDERS:
             raise ValueError("Unknown library sort order")
+        if not isinstance(shelf, str) or shelf not in PARENT_SCOPES:
+            raise ValueError("shelf must be active or archived")
         where, params = _filter(
             text, category, [] if tags is None else tags, tag_mode, folder_prefixes
         )
@@ -328,15 +341,18 @@ class LibraryOperations:
             ceiling = after["ceiling"]
         where += " AND p.id<=?"
         params.append(ceiling)
-        # One SELECT counts the filtered parents and their active variants.
-        total, variant_total = conn.execute(
-            "SELECT COUNT(*),COALESCE(SUM((SELECT COUNT(*) FROM prompt_pairs v "
-            "WHERE v.positive_prompt_id=p.id AND v.archived=0)),0) FROM "
-            + _FROM
-            + " WHERE "
-            + where,
+        # One SELECT counts the filtered parents of this scope, their active
+        # variants, and the filtered archived parents (Show archived, #443).
+        scope = PARENT_SCOPES[shelf]
+        total, variant_total, archived_total = conn.execute(
+            f"SELECT COALESCE(SUM({scope}),0),"
+            f"COALESCE(SUM(CASE WHEN {scope} THEN (SELECT COUNT(*) "
+            "FROM prompt_pairs v WHERE v.positive_prompt_id=p.id "
+            "AND v.archived=0) ELSE 0 END),0),"
+            f"COALESCE(SUM({ARCHIVED}),0) FROM " + _FROM + " WHERE " + where,
             params,
         ).fetchone()
+        where += f" AND {scope}"
         expression, direction = _ORDERS[sort]
         if after is not None:
             operator = ">" if direction == "ASC" else "<"
@@ -369,6 +385,7 @@ class LibraryOperations:
             "items": rows,
             "total": total,
             "variant_total": variant_total,
+            "archived_total": archived_total,
             # Echoed so a client can tell this read applied its tag match.
             "tag_mode": tag_mode,
             "has_more": has_more,
@@ -386,6 +403,7 @@ class LibraryOperations:
         sort: str = "newest",
         limit: int = 40,
         after: dict | None = None,
+        shelf: str = "active",
     ) -> dict:
         with self.library_snapshot(include_ceiling=True) as (conn, epoch, ceiling):
             return self._list_library(
@@ -400,6 +418,7 @@ class LibraryOperations:
                 sort=sort,
                 limit=limit,
                 after=after,
+                shelf=shelf,
             )
 
     def _is_library_positive(self, conn: sqlite3.Connection, positive_id: int) -> bool:
@@ -644,7 +663,9 @@ class LibraryOperations:
             owners = {}
             order = []
             for row in conn.execute(
-                "SELECT p.id,p.text,ls.title,p.category,p.rating,p.notes FROM "
+                "SELECT p.id,p.text,ls.title,p.category,p.rating,p.notes,"
+                + ARCHIVED
+                + " AS archived FROM "
                 + _FROM
                 + " WHERE "
                 + _ELIGIBLE
@@ -657,6 +678,7 @@ class LibraryOperations:
                     "tags": [],
                     "rating": row["rating"],
                     "notes": row["notes"],
+                    "archived": bool(row["archived"]),
                     "variants": [],
                 }
                 order.append(row["id"])
@@ -701,8 +723,9 @@ class LibraryOperations:
         """System › Overview counts from one snapshot, writing nothing.
 
         ``positive_prompts`` and ``negative_variants`` are the unfiltered
-        Library's ``total`` and ``variant_total``: eligible parents and active
-        pairs (every pair's positive is eligible). ``images`` counts indexed
+        Library's ``total`` and ``variant_total``: eligible parents on the
+        shelf (not archived, #443) and their active pairs (every pair's
+        positive is eligible). ``images`` counts indexed
         ``generated_images`` rows, not files on disk. An image has no rating
         of its own (it shows its linked prompt's), so ``rated_images`` counts
         the indexed images whose linked prompt is rated. ``review_pending`` is
@@ -710,8 +733,14 @@ class LibraryOperations:
         """
         with self.library_snapshot() as (conn, _epoch, _ceiling):
             row = conn.execute(
-                "SELECT (SELECT COUNT(*) FROM prompts p WHERE " + _ELIGIBLE + "),"
-                "(SELECT COUNT(*) FROM prompt_pairs WHERE archived=0),"
+                "SELECT (SELECT COUNT(*) FROM prompts p WHERE "
+                + _ELIGIBLE
+                + " AND "
+                + SHELVED
+                + "),"
+                "(SELECT COUNT(*) FROM prompt_pairs pp WHERE pp.archived=0 AND "
+                + SHELVED_PAIR
+                + "),"
                 "(SELECT COUNT(*) FROM generated_images),"
                 "(SELECT COUNT(*) FROM generated_images gi JOIN prompts r "
                 "ON r.id=gi.prompt_id WHERE r.rating IS NOT NULL),"
diff --git a/database/library_archive.py b/database/library_archive.py
new file mode 100644
index 00000000..c44aa5e0
--- /dev/null
+++ b/database/library_archive.py
@@ -0,0 +1,289 @@
+"""Delete selected Library prompts; archive the paired ones (#443, D152).
+
+A selected Library parent is classified, in this order, as ``not_found``
+(missing, or not a Library parent), ``protected`` (tagged ``__protected__``;
+never changed), ``already_archived``, ``archive`` (the positive or negative of
+any saved pair, archived pair or not: archiving hides it from the shelf and
+removes nothing) or ``delete`` (in no pair: deleted exactly as the legacy
+delete does, through ``delete_prompt_rows``). Every command checks the
+storage epoch first and runs in one ``BEGIN IMMEDIATE`` transaction.
+
+The write executes what the user reviewed: it is given the reviewed archive
+and delete lists, and deletes only reviewed deletes the route backed up
+(``candidates``) whose fingerprint is unchanged since that backup.
+"""
+
+import sqlite3
+from typing import Iterable
+
+from .library import _ELIGIBLE
+from .library_commands import _validate_bulk_ids, _validate_epoch
+from .models import utc_now_iso
+from .prompt_archive import ARCHIVED as _ARCHIVED
+from .prompt_archive import TABLE as ARCHIVE
+from .workflow_documents import documents_of_rows, release_documents
+
+try:
+    from ..utils.hashing import generate_prompt_hash
+except ImportError:
+    from utils.hashing import generate_prompt_hash
+
+# Ids bound per statement: the pair check binds each id twice, which stays
+# under SQLite's historical 999-variable limit (maintenance.py ID_BATCH).
+ID_BATCH = 400
+_PROTECTED = (
+    "EXISTS(SELECT 1 FROM prompt_tags pt JOIN tags t ON t.id=pt.tag_id "
+    "WHERE pt.prompt_id=p.id AND t.name='__protected__')"
+)
+_PAIRED = (
+    "EXISTS(SELECT 1 FROM prompt_pairs pp "
+    "WHERE pp.positive_prompt_id=p.id OR pp.negative_prompt_id=p.id)"
+)
+# Classes in the order a prompt is tested; the first that holds wins.
+CLASSES = ("not_found", "protected", "already_archived", "archive", "delete")
+
+
+def _batches(ids: list) -> Iterable[list]:
+    for start in range(0, len(ids), ID_BATCH):
+        yield ids[start : start + ID_BATCH]
+
+
+def delete_prompt_rows(conn: sqlite3.Connection, prompt_ids: list[int]) -> int:
+    """Delete prompts and their image link rows; return the prompts deleted.
+
+    The legacy delete's statements (``delete_prompt``, ``bulk_delete_prompts``)
+    in the caller's transaction: image link rows first (``image_prompt_pairs``
+    cascades, review decisions keep a NULL image), then the prompts (tags and
+    Library state cascade), then the workflow documents no row references.
+    Image files are never touched. The caller checks pairs first.
+    """
+    documents = documents_of_rows(conn, "prompt_id", prompt_ids)
+    deleted = 0
+    for chunk in _batches(list(prompt_ids)):
+        marks = ",".join("?" for _ in chunk)
+        conn.execute(
+            f"DELETE FROM generated_images WHERE prompt_id IN ({marks})",  # nosec
+            chunk,
+        )
+        deleted += conn.execute(
+            f"DELETE FROM prompts WHERE id IN ({marks})", chunk  # nosec B608
+        ).rowcount
+    release_documents(conn, documents)
+    return deleted
+
+
+class LibraryArchiveOperations:
+    """PromptDatabase mixin: classify, archive or delete, and restore parents."""
+
+    def _classify_library_delete(
+        self, conn: sqlite3.Connection, prompt_ids: list[int]
+    ) -> dict:
+        found = {}
+        for chunk in _batches(prompt_ids):
+            marks = ",".join("?" for _ in chunk)
+            for row in conn.execute(
+                f"SELECT p.id,{_PROTECTED},{_ARCHIVED},{_PAIRED} "  # nosec B608
+                f"FROM prompts p WHERE p.id IN ({marks}) AND {_ELIGIBLE}",
+                chunk,
+            ):
+                protected, archived, paired = row[1], row[2], row[3]
+                if protected:
+                    found[row[0]] = "protected"
+                elif archived:
+                    found[row[0]] = "already_archived"
+                else:
+                    found[row[0]] = "archive" if paired else "delete"
+        classes = {name: [] for name in CLASSES}
+        for pid in prompt_ids:
+            classes[found.get(pid, "not_found")].append(pid)
+        return classes
+
+    @staticmethod
+    def _image_links(conn: sqlite3.Connection, prompt_ids: list[int]) -> int:
+        total = 0
+        for chunk in _batches(prompt_ids):
+            marks = ",".join("?" for _ in chunk)
+            total += conn.execute(
+                "SELECT COUNT(*) FROM generated_images "  # nosec B608
+                f"WHERE prompt_id IN ({marks})",
+                chunk,
+            ).fetchone()[0]
+        return total
+
+    @staticmethod
+    def _fingerprints(conn: sqlite3.Connection, prompt_ids: list[int]) -> dict:
+        """What a safety backup holds of each prompt a delete would remove.
+
+        The prompt row (usage included), its tag ids, its Library title and
+        its image link rows (count and newest id), as a JSON-safe list.
+        """
+        prints = {}
+        for chunk in _batches(prompt_ids):
+            marks = ",".join("?" for _ in chunk)
+            for row in conn.execute(
+                "SELECT p.id,p.text,p.hash,p.category,p.rating,p.notes,"  # nosec
+                "p.updated_at,p.run_count,p.last_used_at,"
+                "(SELECT group_concat(tag_id) FROM (SELECT tag_id FROM prompt_tags "
+                "WHERE prompt_id=p.id ORDER BY tag_id)),"
+                "(SELECT title FROM prompt_library_state WHERE prompt_id=p.id),"
+                "(SELECT COUNT(*) FROM generated_images WHERE prompt_id=p.id),"
+                "(SELECT MAX(id) FROM generated_images WHERE prompt_id=p.id) "
+                f"FROM prompts p WHERE p.id IN ({marks})",
+                chunk,
+            ):
+                prints[row[0]] = [
+                    value if isinstance(value, (int, str, type(None))) else repr(value)
+                    for value in tuple(row)[1:]
+                ]
+        return prints
+
+    @staticmethod
+    def _checked_ids(prompt_ids: list[int], expected_epoch: str) -> list[int]:
+        _validate_epoch(expected_epoch)
+        _validate_bulk_ids(prompt_ids)
+        return list(dict.fromkeys(prompt_ids))
+
+    def classify_library_delete(
+        self, prompt_ids: list[int], *, expected_epoch: str
+    ) -> dict:
+        """What a delete of ``prompt_ids`` would do now (reads only).
+
+        Returns the id lists per class, in request order, ``image_links``
+        (the image link rows the ``delete`` class would remove) and
+        ``fingerprints`` of the ``delete`` class (``_fingerprints``).
+        """
+        prompt_ids = self._checked_ids(prompt_ids, expected_epoch)
+        with self.library_snapshot() as (conn, _epoch, _ceiling):
+            epoch = self._library_epoch(conn, expected_epoch)
+            classes = self._classify_library_delete(conn, prompt_ids)
+            return {
+                "library_epoch": epoch,
+                **classes,
+                "image_links": self._image_links(conn, classes["delete"]),
+                "fingerprints": self._fingerprints(conn, classes["delete"]),
+            }
+
+    @staticmethod
+    def _repair_hash(conn: sqlite3.Connection, prompt_id: int) -> None:
+        """Give an archived prompt its canonical hash, so ingestion finds it.
+
+        Scans, the monitor and node saves resolve prompts by hash; a stale or
+        missing one would make them insert a visible copy (Q3). When another
+        row already holds the canonical hash, lookups find that row and no new
+        copy is made, so nothing is written.
+        """
+        text, stored = conn.execute(
+            "SELECT text,hash FROM prompts WHERE id=?", (prompt_id,)
+        ).fetchone()
+        canonical = generate_prompt_hash(text) if isinstance(text, str) else None
+        if canonical is None or stored == canonical:
+            return
+        if conn.execute(
+            "SELECT 1 FROM prompts WHERE hash=? AND id!=?", (canonical, prompt_id)
+        ).fetchone():
+            return
+        conn.execute("UPDATE prompts SET hash=? WHERE id=?", (canonical, prompt_id))
+
+    def archive_or_delete_library_prompts(
+        self,
+        archive_ids: list[int],
+        delete_ids: list[int],
+        *,
+        expected_epoch: str,
+        candidates: dict | None,
+    ) -> dict:
+        """Archive and delete what the user reviewed, all or nothing.
+
+        ``archive_ids`` and ``delete_ids`` are the reviewed classes.
+        ``candidates`` maps each reviewed delete the route backed up to its
+        fingerprint then (None: every reviewed delete, unchecked; tests and
+        callers without a backup). A reviewed delete is deleted only when it
+        still classifies ``delete`` and its fingerprint is unchanged; one that
+        is now paired, and a reviewed archive now unpaired, are archived (the
+        restorable direction); anything else is kept and counted.
+        """
+        _validate_epoch(expected_epoch)
+        for ids in (archive_ids, delete_ids):
+            if not isinstance(ids, list) or any(
+                type(pid) is not int or not 1 <= pid <= 2**63 - 1 for pid in ids
+            ):
+                raise ValueError("prompt ids must be lists of positive integers")
+        reviewed_delete = set(delete_ids)
+        if not archive_ids and not delete_ids:
+            raise ValueError("Nothing to delete or archive")
+        if reviewed_delete & set(archive_ids):
+            raise ValueError("A prompt cannot be both archived and deleted")
+        prompt_ids = list(dict.fromkeys([*archive_ids, *delete_ids]))
+        with self._pair_transaction() as conn:
+            epoch = self._library_epoch(conn, expected_epoch)
+            classes = self._classify_library_delete(conn, prompt_ids)
+            now_prints = self._fingerprints(conn, classes["delete"])
+            deletes, archives, changed = [], list(classes["archive"]), 0
+            for pid in classes["delete"]:
+                if pid not in reviewed_delete:
+                    archives.append(pid)  # reviewed as archive, now unpaired
+                elif candidates is None or candidates.get(pid) == now_prints[pid]:
+                    deletes.append(pid)
+                else:
+                    changed += 1
+            changed += len(classes["protected"])
+            image_links = self._image_links(conn, deletes)
+            now = utc_now_iso()
+            for pid in archives:
+                self._repair_hash(conn, pid)
+            conn.executemany(
+                f"INSERT INTO {ARCHIVE}(prompt_id, archived_at) VALUES (?, ?)",
+                [(pid, now) for pid in archives],
+            )
+            # A changed row is the newest edit the restore fingerprint reads.
+            conn.executemany(
+                "UPDATE prompts SET updated_at=? WHERE id=?",
+                [(now, pid) for pid in archives],
+            )
+            deleted = delete_prompt_rows(conn, deletes)
+            return {
+                "library_epoch": epoch,
+                "deleted": deleted,
+                "archived": len(archives),
+                "already_archived": len(classes["already_archived"]),
+                "not_found": len(classes["not_found"]),
+                "changed": changed,
+                "image_links": image_links,
+            }
+
+    def restore_library_prompts(
+        self, prompt_ids: list[int], *, expected_epoch: str
+    ) -> dict:
+        """Put archived prompts back on the shelf, all or nothing.
+
+        Every requested id with an archive row is restored, whatever its
+        protection or Library parent state: restoring only un-hides it.
+        """
+        prompt_ids = self._checked_ids(prompt_ids, expected_epoch)
+        with self._pair_transaction() as conn:
+            epoch = self._library_epoch(conn, expected_epoch)
+            restored, existing = [], set()
+            for chunk in _batches(prompt_ids):
+                marks = ",".join("?" for _ in chunk)
+                for pid, archived in conn.execute(
+                    f"SELECT p.id,{_ARCHIVED} FROM prompts p "  # nosec B608
+                    f"WHERE p.id IN ({marks})",
+                    chunk,
+                ):
+                    existing.add(pid)
+                    if archived:
+                        restored.append(pid)
+            now = utc_now_iso()
+            conn.executemany(
+                f"DELETE FROM {ARCHIVE} WHERE prompt_id=?", [(pid,) for pid in restored]
+            )
+            conn.executemany(
+                "UPDATE prompts SET updated_at=? WHERE id=?",
+                [(now, pid) for pid in restored],
+            )
+            return {
+                "library_epoch": epoch,
+                "restored": len(restored),
+                "unchanged": len(existing) - len(restored),
+                "not_found": len(prompt_ids) - len(existing),
+            }
diff --git a/database/maintenance.py b/database/maintenance.py
index a76d2d9c..c2a5cdd8 100644
--- a/database/maintenance.py
+++ b/database/maintenance.py
@@ -85,6 +85,12 @@ PROTECTIONS = (
         "with Library state (a title or an explicit parent)",
         "with Library state (a title or an explicit parent)",
     ),
+    (
+        # #443: an archived prompt is restorable, never pruned.
+        "EXISTS (SELECT 1 FROM prompt_archive pa WHERE pa.prompt_id = p.id)",
+        "archived in the Library",
+        "archived in the Library",
+    ),
     (
         "p.id IN (SELECT prompt_id FROM live_hint_prompts)",
         "used by recorded runs",
@@ -93,7 +99,8 @@ PROTECTIONS = (
 )
 
 # Exempt references: images, pairs, the __protected__ tag, Library parent
-# state, and live recorded-run hints (computed once, see LIVE_HINT_CTES).
+# state, the Library archive, and live recorded-run hints (computed once,
+# see LIVE_HINT_CTES).
 ORPHANED_PROMPTS_SQL = (
     "WITH "
     + LIVE_HINT_CTES
diff --git a/database/models.py b/database/models.py
index d64cbcba..4c506962 100644
--- a/database/models.py
+++ b/database/models.py
@@ -45,6 +45,7 @@ except ImportError:
     from utils.hashing import register_prompt_functions
 from .image_categories import image_categories_schema_error, migrate_image_categories
 from .image_removal_schema import image_removals_schema_error, migrate_image_removals
+from .prompt_archive import migrate_prompt_archive, prompt_archive_schema_error
 from .workflow_documents import (
     DOCUMENT_ID_COLUMNS,
     migrate_workflow_documents,
@@ -367,6 +368,8 @@ class PromptModel:
         migrate_autotag_state(conn)
         # Image categories (#332): independent of every table above.
         migrate_image_categories(conn)
+        # The Library parent archive (#443): independent of every table above.
+        migrate_prompt_archive(conn)
         # Removal marks (#480): independent of every table above.
         migrate_image_removals(conn)
         # Last: the older generated_images rebuilds run only before file_path.
@@ -1245,6 +1248,11 @@ class PromptModel:
             )
             if categories_error:
                 return False, categories_error
+            archive_error = prompt_archive_schema_error(
+                conn, allow_missing=not require_library_state
+            )
+            if archive_error:
+                return False, archive_error
             removals_error = image_removals_schema_error(
                 conn, allow_missing=not require_library_state
             )
diff --git a/database/operations.py b/database/operations.py
index da5d0ae8..51607876 100644
--- a/database/operations.py
+++ b/database/operations.py
@@ -25,6 +25,7 @@ from .review import ReviewOperations
 from .review_decisions import ReviewDecisionOperations
 from .saved_views import SavedViewOperations
 from .library_commands import LibraryCommandOperations
+from .library_archive import LibraryArchiveOperations, delete_prompt_rows
 from .vocabulary import VocabularyOperations
 from .execution_history import ExecutionHistoryOperations
 from .execution_contexts import ExecutionContextOperations
@@ -449,6 +450,7 @@ class PromptDatabase(
     PairOperations,
     LibraryOperations,
     LibraryCommandOperations,
+    LibraryArchiveOperations,
     VocabularyOperations,
     ExecutionHistoryOperations,
     ExecutionContextOperations,
@@ -2351,16 +2353,10 @@ class PromptDatabase(
         Returns:
             Number of prompts actually deleted.
         """
-        count = 0
         with self._pair_transaction() as conn:
             self._ensure_prompts_unpaired(conn, prompt_ids)
-            documents = documents_of_rows(conn, "prompt_id", prompt_ids)
-            for pid in prompt_ids:
-                conn.execute("DELETE FROM generated_images WHERE prompt_id = ?", (pid,))
-                cursor = conn.execute("DELETE FROM prompts WHERE id = ?", (pid,))
-                if cursor.rowcount > 0:
-                    count += 1
-            release_documents(conn, documents)
+            # The workspace Library's delete runs the same statements (#443).
+            count = delete_prompt_rows(conn, list(dict.fromkeys(prompt_ids)))
             conn.commit()
         return count
 
diff --git a/database/prompt_archive.py b/database/prompt_archive.py
new file mode 100644
index 00000000..9f824361
--- /dev/null
+++ b/database/prompt_archive.py
@@ -0,0 +1,107 @@
+"""Library parent archive (#443, D152): prompts hidden from the shelf, restorable.
+
+A row means the Library parent is archived; no row means it is on the shelf.
+Nothing else about the prompt changes: its text, metadata, tags, run count,
+image links, pairs and recorded runs stay. Restore deletes the row. Deleting
+the prompt (any path) drops the row by cascade.
+
+A table of its own, not a column: ``prompt_library_state`` is validated by its
+exact definition, so a new column there would make older builds refuse the
+upgraded database, while older builds ignore an unknown table (they show the
+archived prompts again and keep the rows). Optional in old backups, required
+once a database is current.
+"""
+
+import re
+import sqlite3
+
+TABLE = "prompt_archive"
+MAX_STAMP_BYTES = 64
+# What ``utc_now_iso`` writes starts with a date; anything else was not written here.
+_STAMP_GLOB = "[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]T*"
+_DDL = (
+    f"CREATE TABLE {TABLE} (prompt_id INTEGER PRIMARY KEY, "
+    "archived_at TEXT NOT NULL, "
+    "FOREIGN KEY(prompt_id) REFERENCES prompts(id) ON DELETE CASCADE)"
+)
+_COLUMNS = (("prompt_id", "INTEGER", 0, 1), ("archived_at", "TEXT", 1, 0))
+_FOREIGN_KEYS = {("prompt_id", "prompts", "id", "CASCADE")}
+# A predicate on ``p`` (the prompts alias): the parent is not archived.
+SHELVED = f"NOT EXISTS(SELECT 1 FROM {TABLE} pa WHERE pa.prompt_id=p.id)"
+ARCHIVED = f"EXISTS(SELECT 1 FROM {TABLE} pa WHERE pa.prompt_id=p.id)"
+
+
+def _compact(sql: str) -> str:
+    return re.sub(r"\s+", "", sql or "").lower()
+
+
+def _structure_error(conn: sqlite3.Connection, allow_missing: bool) -> str | None:
+    objects = conn.execute(
+        "SELECT type,sql FROM sqlite_master WHERE name=? "
+        "OR (type IN ('index','trigger') AND tbl_name=?)",
+        (TABLE, TABLE),
+    ).fetchall()
+    if not objects:
+        return None if allow_missing else "Missing prompt archive schema"
+    tables = [sql for kind, sql in objects if kind == "table"]
+    if len(tables) != 1 or len(objects) != 1:
+        return "Prompt archive name is reserved by an unsupported schema object"
+    if _compact(tables[0]) != _compact(_DDL):
+        return "Prompt archive has an invalid table definition"
+    columns = tuple(
+        (row[1], row[2].upper(), row[3], row[5])
+        for row in conn.execute(f"PRAGMA table_info({TABLE})")
+    )
+    if columns != _COLUMNS:
+        return "Prompt archive has invalid columns"
+    foreign_keys = {
+        (row[3], row[2], row[4], row[6])
+        for row in conn.execute(f"PRAGMA foreign_key_list({TABLE})")
+    }
+    if foreign_keys != _FOREIGN_KEYS:
+        return "Prompt archive has invalid foreign key definitions"
+    return None
+
+
+def prompt_archive_schema_error(
+    conn: sqlite3.Connection, *, allow_missing: bool = True
+) -> str | None:
+    """Reject an unsupported archive schema or values; reads only.
+
+    A missing table is acceptable for backups that predate it unless
+    ``allow_missing`` is false.
+    """
+    error = _structure_error(conn, allow_missing)
+    if error is not None:
+        return error
+    if not conn.execute(
+        "SELECT 1 FROM sqlite_master WHERE type='table' AND name=?", (TABLE,)
+    ).fetchone():
+        return None
+    if conn.execute(f"PRAGMA foreign_key_check({TABLE})").fetchone():
+        return "Prompt archive contains foreign key violations"
+    if conn.execute(
+        f"SELECT 1 FROM {TABLE} WHERE typeof(archived_at)!='text' "  # nosec B608
+        f"OR length(CAST(archived_at AS BLOB))>{MAX_STAMP_BYTES} "
+        f"OR archived_at NOT GLOB '{_STAMP_GLOB}' LIMIT 1"
+    ).fetchone():
+        return "Prompt archive contains invalid values"
+    return None
+
+
+def migrate_prompt_archive(conn: sqlite3.Connection) -> None:
+    """Install the table atomically; validate before and after (no backfill)."""
+    conn.execute("SAVEPOINT prompt_archive_schema")
+    try:
+        error = _structure_error(conn, True)
+        if error:
+            raise sqlite3.DatabaseError(error)
+        conn.execute(_DDL.replace("CREATE TABLE", "CREATE TABLE IF NOT EXISTS", 1))
+        error = _structure_error(conn, False)
+        if error:
+            raise sqlite3.DatabaseError(error)
+        conn.execute("RELEASE prompt_archive_schema")
+    except BaseException:
+        conn.execute("ROLLBACK TO prompt_archive_schema")
+        conn.execute("RELEASE prompt_archive_schema")
+        raise
diff --git a/database/restore_stage.py b/database/restore_stage.py
index 704435bf..1a3a3762 100644
--- a/database/restore_stage.py
+++ b/database/restore_stage.py
@@ -149,6 +149,7 @@ def library_summary(conn: sqlite3.Connection) -> Dict[str, int]:
     collections (#331).
     """
     from .library import _ELIGIBLE
+    from .prompt_archive import SHELVED, TABLE as ARCHIVE
 
     has_state = conn.execute(
         "SELECT 1 FROM sqlite_master WHERE type='table' AND "
@@ -157,9 +158,15 @@ def library_summary(conn: sqlite3.Connection) -> Dict[str, int]:
     has_pairs = conn.execute(
         "SELECT 1 FROM sqlite_master WHERE type='table' AND name='prompt_pairs'"
     ).fetchone()
+    has_archive = conn.execute(
+        "SELECT 1 FROM sqlite_master WHERE type='table' AND name=?", (ARCHIVE,)
+    ).fetchone()
     if has_state and has_pairs:
+        # Archived parents (#443) are off the shelf, as in library_counts.
         positives = conn.execute(
-            "SELECT COUNT(*) FROM prompts p WHERE " + _ELIGIBLE
+            "SELECT COUNT(*) FROM prompts p WHERE "
+            + _ELIGIBLE
+            + (" AND " + SHELVED if has_archive else "")
         ).fetchone()[0]
     else:
         positives = _count(conn, "prompts")
diff --git a/database/vocabulary.py b/database/vocabulary.py
index 5eb22c34..971112bd 100644
--- a/database/vocabulary.py
+++ b/database/vocabulary.py
@@ -20,7 +20,8 @@ counted, hashed into the token and renamed with the prompts and pairs.
 
 import sqlite3
 
-from .library import _ELIGIBLE, UNTAGGED, _escape, _limit
+from .library import _ELIGIBLE, SHELVED_PAIR, UNTAGGED, _escape, _limit
+from .prompt_archive import SHELVED
 from .library_commands import _TOKEN, LibraryCommandError, _validate_epoch
 from .library_tokens import canonical_token
 from .models import utc_now_iso
@@ -40,17 +41,21 @@ _IMAGE_FILES = (
 
 def _tag_rows(page: str, order: str = "page.id") -> str:
     """Count rows for the registry rows selected by ``page`` (id, name)."""
-    # Eligible parent components carrying a tag in the page, plus the
-    # positive parent of every active pair carrying it (always eligible).
+    # Eligible parent components on the shelf carrying a tag in the page,
+    # plus the positive parent of every active pair carrying it (always
+    # eligible) when that parent is on the shelf: archived parents (#443)
+    # are hidden with their pairs, so Browse lists what was counted.
     return (
         "WITH page AS (" + page + "),"
         "owners(tag_id,pid) AS ("
         "SELECT pt.tag_id,p.id FROM prompts p "
         "JOIN prompt_tags pt ON pt.prompt_id=p.id "
         "WHERE pt.tag_id IN (SELECT id FROM page) AND " + _ELIGIBLE + " "
+        "AND " + SHELVED + " "
         "UNION SELECT ppt.tag_id,pp.positive_prompt_id FROM prompt_pairs pp "
         "JOIN prompt_pair_tags ppt ON ppt.pair_id=pp.id "
-        "WHERE pp.archived=0 AND ppt.tag_id IN (SELECT id FROM page)),"
+        "WHERE pp.archived=0 AND " + SHELVED_PAIR + " "
+        "AND ppt.tag_id IN (SELECT id FROM page)),"
         "images(tag_id,n) AS (" + _IMAGE_FILES + " "
         "WHERE mit.tag_id IN (SELECT id FROM page) GROUP BY mit.tag_id) "
         "SELECT page.id,page.name,COUNT(DISTINCT owners.pid) AS prompt_count,"
@@ -79,8 +84,10 @@ _RANKED_TAG_PAGE = (
     "WITH owners(tag_id,pid) AS ("
     "SELECT pt.tag_id,p.id FROM prompts p "
     "JOIN prompt_tags pt ON pt.prompt_id=p.id WHERE " + _ELIGIBLE + " "
+    "AND " + SHELVED + " "
     "UNION SELECT ppt.tag_id,pp.positive_prompt_id FROM prompt_pairs pp "
-    "JOIN prompt_pair_tags ppt ON ppt.pair_id=pp.id WHERE pp.archived=0),"
+    "JOIN prompt_pair_tags ppt ON ppt.pair_id=pp.id WHERE pp.archived=0 "
+    "AND " + SHELVED_PAIR + "),"
     "counted AS (SELECT t.id,t.name,COUNT(DISTINCT o.pid) AS prompt_count "
     "FROM tags t LEFT JOIN owners o ON o.tag_id=t.id WHERE {search} "
     "GROUP BY t.id),"
@@ -94,7 +101,13 @@ _RANKED_TAG_PAGE = (
     "ORDER BY page.prompt_count {direction},page.id"
 )
 _UNTAGGED_COUNT = (
-    "SELECT COUNT(*) FROM prompts p WHERE (" + _ELIGIBLE + ") AND " + UNTAGGED
+    "SELECT COUNT(*) FROM prompts p WHERE ("
+    + _ELIGIBLE
+    + ") AND "
+    + UNTAGGED
+    # Untagged prompts opens the shelf, which hides archived parents (#443).
+    + " AND "
+    + SHELVED
 )
 _TAG_ONE = _tag_rows("SELECT id,name FROM tags WHERE id=?")
 # Every owner kind a tag can sit on, for the delete confirmation.
@@ -134,7 +147,9 @@ def _validate_tag_id(tag_id: object) -> None:
 
 
 # Category values in Tags & categories (#332 §7): the prompt-backed values
-# (nonblank values on eligible parents or on active pairs, grouped exactly, so
+# (nonblank values on eligible parents or on active pairs; ``prompt_count``
+# counts only parents on the shelf, so a value only archived parents (#443)
+# hold stays listed with 0, as a tag does; grouped exactly, so
 # whitespace and case variants stay distinct; /library/options lists the same
 # prompt-backed set with its own query) plus the values only image rows hold.
 # A prompt-backed value is ordered by its oldest owning positive; an image-only
@@ -143,15 +158,17 @@ def _validate_tag_id(tag_id: object) -> None:
 # files missing on disk. No FULL OUTER JOIN, so it runs on SQLite 3.31+.
 _IMAGE_ONLY_FIRST_PID = 2**63 - 1
 _CATEGORY_ROWS = (
-    "WITH owners(value,pid) AS ("
-    "SELECT p.category,p.id FROM prompts p WHERE p.category IS NOT NULL "
-    "AND TRIM(p.category)!='' AND " + _ELIGIBLE + " "
-    "UNION SELECT pp.category,pp.positive_prompt_id FROM prompt_pairs pp "
+    "WITH owners(value,pid,shelved) AS ("
+    "SELECT p.category,p.id," + SHELVED + " FROM prompts p "
+    "WHERE p.category IS NOT NULL AND TRIM(p.category)!='' AND " + _ELIGIBLE + " "
+    "UNION SELECT pp.category,pp.positive_prompt_id," + SHELVED_PAIR + " "
+    "FROM prompt_pairs pp "
     "WHERE pp.archived=0 AND pp.category IS NOT NULL AND TRIM(pp.category)!=''),"
     "image_values(value,image_count) AS ("
     "SELECT category,COUNT(*) FROM image_categories GROUP BY category),"
     "grouped(value,first_pid,prompt_count) AS ("
-    "SELECT value,MIN(pid),COUNT(DISTINCT pid) FROM owners GROUP BY value "
+    "SELECT value,MIN(pid),COUNT(DISTINCT CASE WHEN shelved THEN pid END) "
+    "FROM owners GROUP BY value "
     "UNION ALL SELECT value," + str(_IMAGE_ONLY_FIRST_PID) + ",0 FROM image_values "
     "WHERE value NOT IN (SELECT value FROM owners)),"
     "counted AS (SELECT g.value,g.first_pid,g.prompt_count,"
diff --git a/py/api/__init__.py b/py/api/__init__.py
index f15cce0d..0955bb0c 100644
--- a/py/api/__init__.py
+++ b/py/api/__init__.py
@@ -19,6 +19,7 @@ Split into domain-specific mixins for maintainability:
 - SystemRoutesMixin: System health check, Overview and usage statistics
 - LibraryLocationRoutesMixin: where the library lives, Move library, Keep it here
 - MaintenanceRoutesMixin: reviewed maintenance plans (preview, apply)
+- LibraryDeleteRoutesMixin: the Library's Delete… (archive paired) and Restore
 - WorkflowStorageRoutesMixin: store each workflow once, then Reclaim space
 - DuplicateFilesMixin: duplicate image files as find and removal jobs
 - LoraImportRoutesMixin: the reviewed, staged LoRA reference import job
@@ -43,6 +44,7 @@ from .prompts import PromptRoutesMixin
 from .revalidation import revalidated_response
 from .pairs import PairRoutesMixin
 from .library import LibraryRoutesMixin
+from .library_delete import LibraryDeleteRoutesMixin
 from .vocabulary import VocabularyRoutesMixin
 from .annotations import AnnotationRoutesMixin
 from .review import ReviewRoutesMixin
@@ -315,6 +317,7 @@ async def _gzip_middleware(request, handler):
 class PromptManagerAPI(
     PairRoutesMixin,
     LibraryRoutesMixin,
+    LibraryDeleteRoutesMixin,
     VocabularyRoutesMixin,
     AnnotationRoutesMixin,
     ReviewRoutesMixin,
@@ -700,6 +703,7 @@ class PromptManagerAPI(
 
         self._register_pair_routes(routes)
         self._register_library_routes(routes)
+        self._register_library_delete_routes(routes)
         self._register_vocabulary_routes(routes)
         self._register_annotation_routes(routes)
         self._register_review_routes(routes)
diff --git a/py/api/jobs.py b/py/api/jobs.py
index 52f016be..7196d43b 100644
--- a/py/api/jobs.py
+++ b/py/api/jobs.py
@@ -123,6 +123,9 @@ MODEL_DOWNLOAD_JOB_KIND = "model_download"
 DUPLICATES_JOB_KIND = "duplicates"
 DUPLICATE_GROUP_NAMES = ("groups_found",)
 DUPLICATE_CLEANUP_GROUP_NAMES = ("removed", "kept", "errors")
+# The workspace Library's Delete… (#443, py/api/library_delete.py): a
+# ``records`` hold around its safety backup and write.
+PROMPT_DELETE_JOB_KIND = "prompt_delete"
 IMAGE_DELETE_JOB_KIND = "image_delete"  # #480
 IMAGE_DELETE_GROUP_NAMES = ("trashed", "removed", "not_changed", "errors")
 # The System health check (py/api/system.py): a read-only ``read`` job with
diff --git a/py/api/library.py b/py/api/library.py
index be699e70..02ca0088 100644
--- a/py/api/library.py
+++ b/py/api/library.py
@@ -157,6 +157,13 @@ def _archive_scope(request: web.Request) -> str:
     return value
 
 
+def _shelf(request: web.Request) -> str:
+    value = request.query.get("shelf", "active")
+    if value not in ("active", "archived"):
+        raise ValueError("shelf must be active or archived")
+    return value
+
+
 def _missing() -> web.Response:
     return web.json_response(
         {"success": False, "error": "Positive prompt not found"}, status=404
@@ -332,6 +339,9 @@ class LibraryRoutesMixin:
             "tags": sorted(set(request.query.getall("tag", []))),
             "tag_mode": request.query.get("tag_mode", "all"),
             "sort": request.query.get("sort", "newest"),
+            # #443: which shelf; part of the cursor scope, so a cursor never
+            # crosses shelves. Not the variant ``archive`` scope of /{id}.
+            "shelf": _shelf(request),
         }
         limit = _page_limit(request)
         cursor = request.query.get("cursor")
diff --git a/py/api/library_delete.py b/py/api/library_delete.py
new file mode 100644
index 00000000..34038e04
--- /dev/null
+++ b/py/api/library_delete.py
@@ -0,0 +1,263 @@
+"""Delete or archive selected Library prompts, and restore archived ones (#443).
+
+The workspace Prompt library's Delete… (D152). The legacy ``POST
+/prompt_manager/bulk/delete`` and ``DELETE /prompt_manager/delete/{id}`` are
+separate and unchanged.
+
+- ``POST /prompt_manager/library/delete/preview {prompt_ids, expected_epoch}``
+  classifies the selection (reads only, under a lease): the ids to ``delete``
+  (in no saved pair), to ``archive`` (paired), the ``protected`` ones (tagged
+  ``__protected__``, kept), counts of ``already_archived`` and ``not_found``,
+  the ``image_links`` a delete removes, the safety ``backup`` policy and,
+  when a backup would be taken, the ``disk`` it needs.
+- ``POST /prompt_manager/library/delete {archive_ids, delete_ids,
+  expected_epoch, backup}`` executes that review under a ``records`` hold
+  (refused 409 ``busy`` beside a scan, restore, maintenance, move or
+  Optimize). When a delete remains and a backup was promised (the reviewed
+  ``backup`` was "on" or the policy is on now) it checks the disk (507
+  ``insufficient-space``) and takes a verified safety backup (500
+  ``backup-failed``); then one transaction deletes the reviewed deletes whose
+  fingerprint is unchanged since the backup and archives the paired ones.
+- ``POST /prompt_manager/library/restore {prompt_ids, expected_epoch}``
+  removes the archive mark (under a lease).
+
+A changed storage epoch answers 409 ``storage-changed``; nothing is written.
+"""
+
+import sqlite3
+
+from aiohttp import web
+
+try:
+    from ...database.library_commands import LibraryCommandError
+    from ...database.safety_backup import SafetyBackupFailed
+except ImportError:
+    from database.library_commands import LibraryCommandError
+    from database.safety_backup import SafetyBackupFailed
+
+from . import maintenance as _maintenance
+from .admin import _prune_safety_backups
+from .job_routes import busy_response
+from .jobs import PROMPT_DELETE_JOB_KIND, JobBusy
+from .prompts import parse_bulk_prompt_ids
+
+PREVIEW_URL = "/prompt_manager/library/delete/preview"
+DELETE_URL = "/prompt_manager/library/delete"
+RESTORE_URL = "/prompt_manager/library/restore"
+DELETE_TITLE = "Delete prompts (Library)"
+_SELECTION_KEYS = frozenset({"prompt_ids", "expected_epoch"})
+_DELETE_KEYS = frozenset({"archive_ids", "delete_ids", "expected_epoch", "backup"})
+STORAGE_CHANGED = "Prompt storage was restored; refresh the library"
+
+
+def _failure(status, code, error, **extra):
+    return web.json_response(
+        {"success": False, "code": code, "error": error, **extra}, status=status
+    )
+
+
+def _invalid(message):
+    return _failure(400, "invalid-request", message)
+
+
+def _storage_changed(exc):
+    return _failure(409, exc.code, STORAGE_CHANGED, library_epoch=exc.epoch)
+
+
+async def _body(request, keys):
+    """The JSON object with exactly ``keys``, or raise ValueError."""
+    try:
+        data = await request.json()
+    except ValueError:
+        raise ValueError("Expected a JSON object") from None
+    if not isinstance(data, dict):
+        raise ValueError("Expected a JSON object")
+    if set(data) != keys:
+        raise ValueError("Request must contain exactly " + ", ".join(sorted(keys)))
+    return data
+
+
+def _reviewed_ids(value, name):
+    """A reviewed id list: possibly empty, else as ``parse_bulk_prompt_ids``."""
+    if value == []:
+        return []
+    try:
+        return parse_bulk_prompt_ids(value)
+    except ValueError as exc:
+        raise ValueError(str(exc).replace("prompt_ids", name)) from None
+
+
+class LibraryDeleteRoutesMixin:
+    """Mixin providing the workspace Library's delete, archive and restore."""
+
+    def _register_library_delete_routes(self, routes):
+        routes.post(PREVIEW_URL)(self.preview_library_delete)
+        routes.post(DELETE_URL)(self.delete_library_prompts)
+        routes.post(RESTORE_URL)(self.restore_library_prompts)
+
+    async def preview_library_delete(self, request):
+        try:
+            data = await _body(request, _SELECTION_KEYS)
+            ids = parse_bulk_prompt_ids(data["prompt_ids"])
+        except ValueError as exc:
+            return _invalid(str(exc))
+        db = self.db
+        policy = self._safety_backup_policy()
+        try:
+            async with self._jobs.lease("Library delete review"):
+                review = await self._run_in_executor(
+                    db.classify_library_delete,
+                    ids,
+                    expected_epoch=data["expected_epoch"],
+                )
+                disk = None
+                if review["delete"] and policy == "on":
+                    public, short, _size = await self._run_in_executor(
+                        _maintenance.disk_plan,
+                        db.model.db_path,
+                        backup=True,
+                        vacuum=False,
+                    )
+                    disk = {
+                        **public,
+                        "message": (
+                            None
+                            if short is None
+                            else _maintenance.short_space_message(short)
+                        ),
+                    }
+        except JobBusy as busy:
+            return busy_response(busy)
+        except LibraryCommandError as exc:
+            return _storage_changed(exc)
+        except ValueError as exc:
+            return _invalid(str(exc))
+        except (OSError, sqlite3.Error):
+            self.logger.exception("Library delete review failed")
+            return _failure(500, "review-failed", "The delete could not be reviewed")
+        return web.json_response(
+            {
+                "success": True,
+                "library_epoch": review["library_epoch"],
+                "delete": review["delete"],
+                "archive": review["archive"],
+                "protected": review["protected"],
+                "already_archived": len(review["already_archived"]),
+                "not_found": len(review["not_found"]),
+                "image_links": review["image_links"],
+                "backup": policy,
+                "disk": disk,
+            }
+        )
+
+    async def delete_library_prompts(self, request):
+        try:
+            data = await _body(request, _DELETE_KEYS)
+            archive_ids = _reviewed_ids(data["archive_ids"], "archive_ids")
+            delete_ids = _reviewed_ids(data["delete_ids"], "delete_ids")
+            if not archive_ids and not delete_ids:
+                raise ValueError("Nothing to delete or archive")
+            if len(archive_ids) + len(delete_ids) > 1000:
+                raise ValueError("At most 1000 prompts can be changed at once")
+            if set(archive_ids) & set(delete_ids):
+                raise ValueError("A prompt cannot be both archived and deleted")
+            if data["backup"] not in ("on", "off"):
+                raise ValueError("backup must be on or off")
+        except ValueError as exc:
+            return _invalid(str(exc))
+        busy = self._jobs.blocker(PROMPT_DELETE_JOB_KIND, admission="records")
+        if busy is not None:
+            return busy_response(JobBusy(busy))
+        try:
+            async with self._jobs.hold(
+                PROMPT_DELETE_JOB_KIND, DELETE_TITLE, admission="records"
+            ) as job:
+                response = await self._held_library_delete(
+                    self.db, data, archive_ids, delete_ids
+                )
+                if response.status >= 400:
+                    job.finish("failed")
+                return response
+        except JobBusy as busy:
+            return busy_response(busy)
+
+    async def _held_library_delete(self, db, data, archive_ids, delete_ids):
+        epoch = data["expected_epoch"]
+        promised = data["backup"] == "on" or self._safety_backup_policy() == "on"
+        backup = None
+        try:
+            candidates = None
+            if delete_ids:
+                review = await self._run_in_executor(
+                    db.classify_library_delete, delete_ids, expected_epoch=epoch
+                )
+                candidates = review["fingerprints"]
+                if candidates and promised:
+                    _disk, short, _size = await self._run_in_executor(
+                        _maintenance.disk_plan,
+                        db.model.db_path,
+                        backup=True,
+                        vacuum=False,
+                    )
+                    if short is not None:
+                        return _failure(
+                            507,
+                            "insufficient-space",
+                            _maintenance.short_space_message(short),
+                        )
+                    backup = await self._run_in_executor(
+                        _maintenance.take_safety_backup, db.model
+                    )
+            result = await self._run_in_executor(
+                db.archive_or_delete_library_prompts,
+                archive_ids,
+                delete_ids,
+                expected_epoch=epoch,
+                candidates=candidates if candidates is not None else {},
+            )
+        except LibraryCommandError as exc:
+            return _storage_changed(exc)
+        except SafetyBackupFailed as error:
+            self.logger.error("Safety backup before a Library delete failed")
+            return _failure(
+                500, "backup-failed", _maintenance.backup_failed_message(error)
+            )
+        except ValueError as exc:
+            return _invalid(str(exc))
+        except (OSError, sqlite3.Error):
+            self.logger.exception("Library delete failed")
+            return _failure(500, "delete-failed", "The prompts could not be changed")
+        finally:
+            if backup is not None:
+                await self._prune_after_delete(db)
+        return web.json_response({"success": True, **result, "backup": backup})
+
+    async def _prune_after_delete(self, db):
+        try:
+            await self._run_in_executor(_prune_safety_backups, db.model.db_path)
+        except Exception:  # pruning old copies never fails the delete
+            self.logger.exception("Could not prune old safety backups")
+
+    async def restore_library_prompts(self, request):
+        try:
+            data = await _body(request, _SELECTION_KEYS)
+            ids = parse_bulk_prompt_ids(data["prompt_ids"])
+        except ValueError as exc:
+            return _invalid(str(exc))
+        try:
+            async with self._jobs.lease("Library restore"):
+                result = await self._run_in_executor(
+                    self.db.restore_library_prompts,
+                    ids,
+                    expected_epoch=data["expected_epoch"],
+                )
+        except JobBusy as busy:
+            return busy_response(busy)
+        except LibraryCommandError as exc:
+            return _storage_changed(exc)
+        except ValueError as exc:
+            return _invalid(str(exc))
+        except (OSError, sqlite3.Error):
+            self.logger.exception("Library restore failed")
+            return _failure(500, "restore-failed", "The prompts could not be restored")
+        return web.json_response({"success": True, **result})
diff --git a/tests/browser/library-concept.spec.mjs b/tests/browser/library-concept.spec.mjs
index be8bf28e..d7387aaf 100644
--- a/tests/browser/library-concept.spec.mjs
+++ b/tests/browser/library-concept.spec.mjs
@@ -44,7 +44,12 @@ export function mapLibraryConcept(reference) {
         // "4 runs" and "Used today". The two-line clamp is
         // applied below through `clampedCards`, measured on the concept with `CLAMP_CSS` (its samples wrap at 390px).
         footer:card.footer}));
-    return {...reference,library:{...library,toolbar,
+    // D152 (#443): Show archived prompts (N) comes first in the heading actions, a plain button like Export (the concept
+    // fixture has nothing archived, so N is 0).
+    const actions=reference.heading.actions;
+    const plain=actions.buttons.find(button=>!button.primary);
+    const heading={...reference.heading,actions:{...actions,buttons:[{...plain,text:'Show archived prompts (0)'},...actions.buttons]}};
+    return {...reference,heading,library:{...library,toolbar,
         // D35: the caption uses the singular for one.
         caption:{...library.caption,top:library.caption.top-rise,spans:library.caption.spans.map(span=>({...span,text:countCopy(span.text)}))},
         ...(({grid,cards:clamped})=>({grid:{...grid,top:grid.top-rise},cards:clamped}))(clampedCards({grid:library.grid,cards})),
diff --git a/tests/browser/library-delete-concept.spec.mjs b/tests/browser/library-delete-concept.spec.mjs
new file mode 100644
index 00000000..6f373449
--- /dev/null
+++ b/tests/browser/library-delete-concept.spec.mjs
@@ -0,0 +1,147 @@
+import { startCoverage, saveCoverage } from '../../tools/vendor/browser-coverage.mjs';
+import { test, expect } from './fixtures.mjs';
+import { SIZES, THEMES, seedConcept, openConcept, openProduction, diffInventory, mutate } from './concept-inventory.mjs';
+
+// #443 D152: the Library's Delete… review against the concept's own reviewed archive: the recipe editor's "Archive…"
+// (app.js 976), which opens `maintenancePlan("archive <title>")` (953–958, 1309–1310). The concept's shell, grid tokens,
+// `p.small` and actions are kept; its title, demo note, rows, note text and `ca-primary` start are replaced by D152's,
+// and the start takes the concept's `danger` class, measured on the editor's own "Archive…". The bar's Delete… is
+// compared with the concept Images bar's danger action, "Remove links…" (app.js 432).
+test.use({ locale: 'en-US', timezoneId: 'UTC' });
+
+test.beforeEach(async ({ page, request, browserName }) => {
+    await startCoverage(page, browserName);
+    await seedConcept(request);
+    page.conceptErrors = [];
+    page.on('pageerror', error => page.conceptErrors.push(error.message));
+});
+test.afterEach(async ({ page, browserName }) => {
+    await saveCoverage(page, browserName);
+    expect(page.conceptErrors).toEqual([]);
+});
+
+/** Runs in the page: the open review dialog's title, body tree, grid, notes and actions with the concept's tokens. */
+function measureReview() {
+    const dialog = document.querySelector('dialog#modal[open]');
+    const css = (node, ...keys) => node ? Object.fromEntries(keys.map(key => [key, getComputedStyle(node)[key]])) : null;
+    const name = node => [node.localName, ...[...node.classList].sort()].join('.');
+    const text = node => node?.textContent.trim() ?? null;
+    const body = dialog.querySelector('#modal-body');
+    const grid = body.querySelector(':scope > dl.meta-grid');
+    const notes = [...body.querySelectorAll(':scope > p.small')];
+    const actions = body.querySelector(':scope > .dialog-actions');
+    return {
+        title: text(dialog.querySelector('#modal-title')),
+        tree: [...body.children].map(name).filter(item => item !== 'p.demo-note' && item !== 'h3'),
+        grid: { rows: [...grid.children].map(row => [text(row.querySelector('dt')), text(row.querySelector('dd'))]),
+            ...css(grid, 'display', 'gridTemplateColumns', 'columnGap', 'rowGap'),
+            dt: css(grid.querySelector('dt'), 'fontSize', 'color', 'textTransform'), dd: css(grid.querySelector('dd'), 'fontSize', 'color') },
+        notes: notes.map(note => ({ text: text(note), ...css(note, 'fontSize', 'color', 'marginTop') })),
+        actions: { tree: [...actions.children].map(name), ...css(actions, 'display', 'justifyContent', 'columnGap', 'marginTop'),
+            buttons: [...actions.children].map(item => ({ text: text(item), className: item.className,
+                ...css(item, 'backgroundColor', 'color', 'fontSize', 'paddingTop', 'paddingLeft', 'borderTopColor') })) },
+    };
+}
+
+/** Runs in the page: a button's class and tokens (the concept's danger button, or production's). */
+function measureButton(selector) {
+    const node = document.querySelector(selector);
+    const style = getComputedStyle(node);
+    return { className: node.className, ...Object.fromEntries(['backgroundColor', 'color', 'fontSize', 'fontWeight', 'paddingTop',
+        'paddingLeft', 'borderTopColor', 'borderTopLeftRadius', 'height'].map(key => [key, key === 'height'
+        ? `${Math.round(node.getBoundingClientRect().height * 100) / 100}px` : style[key]])) };
+}
+
+async function conceptReview(page, theme) {
+    await openConcept(page, 'prompt/alpine', theme);
+    await page.locator('#main .heading-actions').getByRole('button', { name: 'Edit metadata', exact: true }).click();
+    const archive = page.locator('dialog#modal[open] .dialog-actions button', { hasText: 'Archive…' });
+    await expect(archive).toBeVisible();await page.mouse.move(0, 0);
+    const danger = await page.evaluate(measureButton, 'dialog#modal[open] .dialog-actions button.danger');
+    await archive.click();
+    await expect(page.locator('dialog#modal[open] #modal-title')).toHaveText('Review maintenance plan');
+    await page.mouse.move(0, 0);
+    return { danger, review: await page.evaluate(measureReview) };
+}
+
+async function seedMixed(request) {
+    // One unpaired prompt beside the concept's paired ones, so the review deletes one and archives one.
+    await expect(await request.post('/prompt_manager/save', { data: { text: 'Unpaired study', category: 'Studies' } })).toBeOK();
+    const items = (await (await request.get('/prompt_manager/library?limit=100')).json()).items;
+    return { unpaired: items.find(item => item.text === 'Unpaired study'), paired: items.find(item => item.variant_count > 0) };
+}
+
+async function productionReview(page, request, theme) {
+    const { unpaired, paired } = await seedMixed(request);
+    await openProduction(page, 'library', theme);
+    for (const item of [unpaired, paired]) await page.locator(`article[data-prompt-id="${item.id}"] .image-overlays input`).check();
+    await page.locator('#library-bulkbar .bulkbar').getByRole('button', { name: 'Delete…', exact: true }).click();
+    await expect(page.locator('dialog#modal[open] #modal-title')).toHaveText('Delete or archive selected prompts');
+    await page.mouse.move(0, 0);
+    return page.evaluate(measureReview);
+}
+
+/** D152's changes to the concept's review; everything else must equal the concept. */
+function mapDeleteConcept({ danger, review }) {
+    const [cancel] = review.actions.buttons;
+    const note = review.notes.at(-1);
+    return {
+        ...review,
+        title: 'Delete or archive selected prompts',
+        tree: ['dl.meta-grid', 'p.small', 'p.small', 'div.dialog-actions'],
+        grid: { ...review.grid, rows: [['Delete permanently', '1 prompt not in a saved pair'],
+            ['Archive', '1 prompt in a saved pair: hidden, restorable'],
+            ['Image links removed', '0 images will no longer show these prompts (files stay on disk)'],
+            ['Backup', 'Create and verify before deleting']] },
+        notes: [
+            { ...note, text: 'Prompts in a saved pair, as its positive or its negative, are archived instead of deleted, so the '
+                + 'pair and its runs stay intact. Archived prompts cannot be deleted. To bring them back, press Show archived prompts, '
+                + 'select them and press Restore.' },
+            // A second paragraph takes the concept's own `p + p` margin (style.css 93-95).
+            { ...note, marginTop: '10px', text: "Deleting removes each prompt's text, title, category, tags, rating, notes, run count, last use and "
+                + 'image links. Deleted prompts cannot be brought back one by one: the only way back is to restore the safety '
+                + 'backup taken first (System › Backup & export), which returns the whole library to that moment. It is kept '
+                + 'among the last 10 safety backups. Image files, favorites, collections and recorded runs stay. A later scan, a '
+                + 'new image or a node run with the same text adds it again as a new prompt.' },
+        ],
+        actions: { ...review.actions, tree: [review.actions.tree[0], 'button.danger'], buttons: [cancel, { text: 'Delete 1 and archive 1 prompt', className: danger.className,
+            backgroundColor: danger.backgroundColor, color: danger.color, fontSize: danger.fontSize, paddingTop: danger.paddingTop,
+            paddingLeft: danger.paddingLeft, borderTopColor: danger.borderTopColor }] },
+    };
+}
+
+for (const theme of THEMES) for (const [width, height] of SIZES) {
+    test(`the Delete… review matches the concept's reviewed archive ${theme} ${width}x${height}`, async ({ page, request }, testInfo) => {
+        await page.setViewportSize({ width, height });
+        const concept = await conceptReview(page, theme);
+        expect(concept.review.tree).toEqual(['dl.meta-grid', 'p.small', 'div.dialog-actions']);
+        await page.screenshot({ path: testInfo.outputPath(`concept-archive-review-${theme}-${width}.png`) });
+        const production = await productionReview(page, request, theme);
+        await page.screenshot({ path: testInfo.outputPath(`production-delete-review-${theme}-${width}.png`) });
+        expect(diffInventory(mapDeleteConcept(concept), production)).toEqual([]);
+    });
+}
+
+test('the Delete… review comparison detects mutations', async ({ page, request }) => {
+    await page.setViewportSize({ width: 1600, height: 1100 });
+    const concept = await conceptReview(page, 'dark');
+    await productionReview(page, request, 'dark');
+    const expected = mapDeleteConcept(concept);
+    const paths = async () => diffInventory(expected, await page.evaluate(measureReview)).map(item => item.path);
+    expect(await paths()).toEqual([]);
+    await mutate(page, { css: '#modal-body .dialog-actions .danger { padding-left: 2px }' });
+    expect(await paths()).toContain('actions.buttons.1.paddingLeft');
+});
+
+test('the bar\'s Delete… matches the concept Images bar\'s danger action', async ({ page, request }) => {
+    await page.setViewportSize({ width: 1600, height: 1100 });
+    await openConcept(page, 'images', 'dark');
+    await page.locator('#image-grid .media-card').first().locator('input[data-select]').check();
+    await expect(page.locator('#bulkbar .bulkbar')).toBeVisible();await page.mouse.move(0, 0);
+    const reference = await page.evaluate(measureButton, '#bulkbar .bulkbar button.danger');
+    const { paired } = await seedMixed(request);
+    await openProduction(page, 'library', 'dark');
+    await page.locator(`article[data-prompt-id="${paired.id}"] .image-overlays input`).check();
+    await expect(page.locator('#library-bulkbar .bulkbar')).toBeVisible();await page.mouse.move(0, 0);
+    expect(await page.evaluate(measureButton, '#library-bulkbar .bulkbar button.danger')).toEqual(reference);
+});
diff --git a/tests/browser/system-backups-concept.spec.mjs b/tests/browser/system-backups-concept.spec.mjs
index 8655d621..a2c06b1d 100644
--- a/tests/browser/system-backups-concept.spec.mjs
+++ b/tests/browser/system-backups-concept.spec.mjs
@@ -87,8 +87,8 @@ function measureBackups(mainSelector) {
 }
 
 const SCHEDULE_REASON = 'Daily and Weekly are not available yet: back up with Back up whenever you choose.';
-const SAFETY_DESCRIPTION = 'Keep a verified copy of the database on disk before maintenance, cleanups and LoRA imports change ' +
-    'records. A restore always keeps one.';
+const SAFETY_DESCRIPTION = 'Keep a verified copy of the database on disk before maintenance, cleanups, LoRA imports and ' +
+    'prompt deletes change records. A restore always keeps one.';
 
 /**
  * D103: "Back up" (the concept's "Simulate backup"), the status line from /backup/status, "Export JSON" (its "Export
diff --git a/tests/browser/workspace-library-delete.spec.mjs b/tests/browser/workspace-library-delete.spec.mjs
new file mode 100644
index 00000000..59b72af8
--- /dev/null
+++ b/tests/browser/workspace-library-delete.spec.mjs
@@ -0,0 +1,215 @@
+import {startCoverage,saveCoverage} from '../../tools/vendor/browser-coverage.mjs';
+import {test,expect} from './fixtures.mjs';
+import {armUnseenRestores,unseenRestore} from './unseen-restore.mjs';
+
+// #443 D152: Delete… on the Library bar deletes unpaired prompts, archives paired ones (restorable), keeps protected ones.
+const route='/prompt_manager/workspace#/library';
+const PREVIEW='/prompt_manager/library/delete/preview';
+const DELETE='/prompt_manager/library/delete';
+const cards=page=>page.locator('article[data-prompt-id]');
+const card=(page,id)=>page.locator(`article[data-prompt-id="${id}"]`);
+const box=(page,id)=>card(page,id).locator('.image-overlays input[type="checkbox"]');
+const bar=page=>page.locator('#library-bulkbar > .bulkbar');
+const toast=page=>page.locator('.toast');
+const review=page=>page.getByRole('dialog');
+const showArchived=page=>page.locator('#workspace-main .heading-actions').getByRole('button',{name:/^Show archived prompts/});
+
+async function items(request,shelf='active') {
+    const query=shelf==='archived'?'&shelf=archived':'';
+    return (await(await request.get(`/prompt_manager/library?limit=100${query}`)).json()).items;
+}
+const byText=(list,text)=>list.find(item=>item.text===text);
+function recordPosts(page,path) {
+    const posts=[];
+    page.on('request',item=>{if(item.method()==='POST'&&new URL(item.url()).pathname===path)posts.push(item.postDataJSON());});
+    return posts;
+}
+async function openReview(page) {
+    await bar(page).getByRole('button',{name:'Delete…',exact:true}).click();
+    await expect(review(page)).toBeVisible();
+}
+
+test.beforeEach(async({page,request,browserName})=>{
+    await startCoverage(page,browserName);await expect(await request.post('/__test__/reset',{data:{native_library:true,extra_prompts:2}})).toBeOK();
+    page.libraryErrors=[];page.on('pageerror',error=>page.libraryErrors.push(error.message));
+});
+test.afterEach(async({page,browserName})=>{await saveCoverage(page,browserName);expect(page.libraryErrors).toEqual([]);});
+
+test('Delete… reviews the selection, deletes the unpaired, archives the paired and keeps the protected',async({page,request})=>{
+    const before=await items(request);
+    const dog=byText(before,'Dog landscape'),cat=byText(before,'Cat portrait'),guarded=byText(before,'Library extra 0000');
+    await expect(await request.post('/prompt_manager/bulk/tags',{data:{prompt_ids:[guarded.id],tags:['__protected__']}})).toBeOK();
+    const previews=recordPosts(page,PREVIEW),writes=recordPosts(page,DELETE);
+    await page.goto(route);await expect(cards(page)).toHaveCount(before.length);
+    for(const item of [dog,cat,guarded]) await box(page,item.id).check();
+    await expect(bar(page).getByRole('button')).toHaveText([`Select all ${before.length} loaded`,'Add tags','Set category','Delete…','Clear']);
+    await expect(bar(page).getByRole('button',{name:'Delete…',exact:true})).toHaveClass(/danger/);
+    await openReview(page);
+    await expect(review(page)).toHaveAccessibleName('Delete or archive selected prompts');
+    const grid=review(page).locator('dl.meta-grid > div');
+    await expect(grid.locator('dt')).toHaveText(['Delete permanently','Archive','Protected (kept)','Image links removed','Backup']);
+    await expect(grid.locator('dd')).toHaveText(['1 prompt not in a saved pair','1 prompt in a saved pair: hidden, restorable',
+        '1: Library extra 0000','0 images will no longer show these prompts (files stay on disk)','Create and verify before deleting']);
+    await expect(review(page).locator('p.small')).toHaveCount(3);
+    await expect(review(page).getByRole('button',{name:'Delete 1 and archive 1 prompt',exact:true})).toHaveClass(/danger/);
+    // Cancel writes nothing and releases the bar.
+    await review(page).getByRole('button',{name:'Cancel',exact:true}).click();
+    await expect(review(page)).toHaveCount(0);expect(writes).toEqual([]);
+    await expect(bar(page).getByRole('button',{name:'Delete…',exact:true})).not.toHaveAttribute('aria-disabled','true');
+    await openReview(page);
+    await review(page).getByRole('button',{name:'Delete 1 and archive 1 prompt',exact:true}).click();
+    await expect(toast(page)).toHaveText(/^Deleted 1 prompt\. Archived 1 prompt\. 1 protected prompt was kept\. Safety backup saved: \S+\.backup_\S+ \(System › Backup & export\)\.$/);
+    await expect(page.locator('#library-bulkbar')).toBeEmpty();
+    await expect(card(page,dog.id)).toHaveCount(0);await expect(card(page,cat.id)).toHaveCount(0);await expect(card(page,guarded.id)).toHaveCount(1);
+    const epoch=(await(await request.get('/prompt_manager/library/options')).json()).library_epoch;
+    // One preview per review opened (Cancel, then Delete…).
+    const reviewed={prompt_ids:[dog.id,cat.id,guarded.id],expected_epoch:epoch};
+    expect(previews).toEqual([reviewed,reviewed]);
+    expect(writes).toEqual([{archive_ids:[cat.id],delete_ids:[dog.id],expected_epoch:epoch,backup:'on'}]);
+    const after=await items(request);
+    expect(byText(after,'Dog landscape')).toBeUndefined();expect(byText(after,'Cat portrait')).toBeUndefined();
+    expect((await items(request,'archived')).map(item=>item.id)).toEqual([cat.id]);
+    await expect(showArchived(page)).toHaveText('Show archived prompts (1)');
+});
+
+test('Show archived prompts lists archived prompts, and Restore on its bar returns them',async({page,request})=>{
+    const before=await items(request);const cat=byText(before,'Cat portrait'),dual=byText(before,'Dual role portrait');
+    await page.goto(route);await expect(cards(page)).toHaveCount(before.length);
+    await box(page,cat.id).check();await box(page,dual.id).check();
+    await openReview(page);
+    await expect(review(page)).toHaveAccessibleName('Archive selected prompts');
+    // The archive reason is the saved pair, for one or many prompts (live note on #470): never negative variants.
+    await expect(review(page).locator('dl.meta-grid > div').filter({hasText:'Archive'}).locator('dd')).toHaveText('2 prompts in a saved pair: hidden, restorable');
+    await review(page).getByRole('button',{name:'Archive 2 prompts',exact:true}).click();
+    await expect(toast(page)).toHaveText('Archived 2 prompts.');
+    await expect(cards(page)).toHaveCount(before.length-2);
+    await expect(showArchived(page)).toHaveAttribute('aria-pressed','false');
+    await showArchived(page).click();
+    await expect(showArchived(page)).toHaveAttribute('aria-pressed','true');
+    await expect(cards(page)).toHaveCount(2);
+    await expect(page.locator('.section-caption > span').first()).toHaveText(/^2 archived prompts · \d+ negative variants? hidden with them$/);
+    await expect(card(page,cat.id).locator('.card-title .chip',{hasText:'Archived'})).toHaveCount(1);
+    await box(page,cat.id).check();
+    await expect(bar(page).getByRole('button')).toHaveText(['Select all 2 loaded','Restore','Clear']);
+    await bar(page).getByRole('button',{name:'Restore',exact:true}).click();
+    await expect(toast(page)).toHaveText('Restored 1 prompt to the Prompt library.');
+    await expect(cards(page)).toHaveCount(1);
+    await showArchived(page).click();
+    await expect(cards(page)).toHaveCount(before.length-1);
+    await expect(card(page,cat.id)).toHaveCount(1);
+    expect((await items(request,'archived')).map(item=>item.id)).toEqual([dual.id]);
+    // An empty archived view says so.
+    await showArchived(page).click();await box(page,dual.id).check();
+    await bar(page).getByRole('button',{name:'Restore',exact:true}).click();
+    await expect(page.locator('.library-status')).toHaveText('No archived prompts.');
+});
+
+test('an archived prompt\'s page says so and restores it from its notice',async({page,request})=>{
+    const cat=byText(await items(request),'Cat portrait');
+    const epoch=(await(await request.get('/prompt_manager/library/options')).json()).library_epoch;
+    await expect(await request.post(DELETE,{data:{archive_ids:[cat.id],delete_ids:[],expected_epoch:epoch,backup:'off'}})).toBeOK();
+    await page.goto(`/prompt_manager/workspace#/library/${cat.id}`);
+    const notice=page.locator('.library-archived-notice');
+    await expect(notice.locator('h2')).toHaveText('Archived');
+    // The notice says why (the saved pair) and counts the prompt's negative variants (live note on #470).
+    expect(cat.variant_count).toBeGreaterThan(1);
+    await expect(notice.locator('p').first()).toHaveText(`This prompt is archived because it is in a saved pair. It and its ${cat.variant_count} negative variants are hidden from the Prompt library; nothing was removed.`);
+    await notice.getByRole('button',{name:'Restore this prompt to the Prompt library'}).click();
+    await expect(toast(page)).toHaveText('Restored 1 prompt to the Prompt library.');
+    await expect(notice).toHaveCount(0);
+    expect(byText(await items(request),'Cat portrait')?.id).toBe(cat.id);
+});
+
+// #443: a starved renderer (headless WebKit under CPU load, a background tab) can hold animation frames for
+// seconds; a loaded page of prompts is shown without waiting for one, on first load and after a delete.
+async function holdAnimationFrames(page) {
+    await page.addInitScript(()=>{
+        const request=window.requestAnimationFrame.bind(window),cancel=window.cancelAnimationFrame.bind(window);
+        const held=new Map(),real=new Map();let holding=true,next=0;
+        window.requestAnimationFrame=callback=>{const id=--next;if(holding)held.set(id,callback);else real.set(id,request(callback));return id;};
+        window.cancelAnimationFrame=id=>{held.delete(id);if(real.has(id))cancel(real.get(id));real.delete(id);};
+        window.__releaseAnimationFrames=()=>{holding=false;for(const [id,callback] of held)real.set(id,request(callback));held.clear();};
+    });
+}
+test('a held animation frame does not hide the loaded prompts, on first load or after a delete',async({page,request})=>{
+    const before=await items(request);const dog=byText(before,'Dog landscape');
+    await holdAnimationFrames(page);
+    await page.goto(route);await expect(cards(page)).toHaveCount(before.length);
+    await box(page,dog.id).check();await openReview(page);
+    await review(page).getByRole('button',{name:'Delete 1 prompt',exact:true}).click();
+    await expect(toast(page)).toHaveText(/^Deleted 1 prompt\./);
+    await expect(cards(page)).toHaveCount(before.length-1);await expect(card(page,dog.id)).toHaveCount(0);
+    await page.evaluate(()=>window.__releaseAnimationFrames());
+    await expect(cards(page)).toHaveCount(before.length-1);
+});
+
+test('a double press sends one preview, and the bar holds while it is reviewed',async({page,request})=>{
+    const dog=byText(await items(request),'Dog landscape');
+    const previews=recordPosts(page,PREVIEW);
+    let release;const held=new Promise(resolve=>{release=resolve;});
+    await page.route(`**${PREVIEW}`,async item=>{await held;await item.fallback();});
+    await page.goto(route);await box(page,dog.id).check();
+    const remove=bar(page).getByRole('button',{name:/^(Delete…|Reviewing…)$/});
+    await remove.click();
+    await expect(remove).toHaveText('Reviewing…');await expect(remove).toHaveAttribute('aria-disabled','true');
+    await expect(bar(page).getByRole('button',{name:'Clear',exact:true})).toHaveAttribute('aria-disabled','true');
+    await remove.click({force:true});
+    release();
+    await expect(review(page)).toHaveAccessibleName('Delete selected prompts');
+    expect(previews).toHaveLength(1);
+    await review(page).getByRole('button',{name:'Cancel',exact:true}).click();
+    await expect(bar(page).getByRole('button',{name:'Delete…',exact:true})).not.toHaveAttribute('aria-disabled','true');
+});
+
+test('a restore since the page loaded, a failed backup, a busy job and an unconfirmed answer each say what happened',async({page,request})=>{
+    const before=await items(request);const dog=byText(before,'Dog landscape');
+    await armUnseenRestores(page);
+    await page.goto(route);await expect(cards(page)).toHaveCount(before.length);
+    // Failed backup: nothing changed, the selection stays.
+    await page.route(`**${DELETE}`,item=>item.fulfill({status:500,contentType:'application/json',
+        body:JSON.stringify({success:false,code:'backup-failed',error:'The safety backup could not be taken and verified; nothing was changed.'})}));
+    await box(page,dog.id).check();await openReview(page);
+    await review(page).getByRole('button',{name:'Delete 1 prompt',exact:true}).click();
+    await expect(toast(page)).toHaveText('The safety backup failed. The safety backup could not be taken and verified; nothing was changed.');
+    await expect(box(page,dog.id)).toBeChecked();
+    // Busy: names the job, nothing changed.
+    await page.unroute(`**${DELETE}`);
+    await page.route(`**${DELETE}`,item=>item.fulfill({status:409,contentType:'application/json',
+        body:JSON.stringify({success:false,code:'busy',error:'busy',running:{id:'abc',title:'Scan'}})}));
+    await openReview(page);await review(page).getByRole('button',{name:'Delete 1 prompt',exact:true}).click();
+    await expect(toast(page)).toHaveText('Scan is running. Nothing was changed; try again when it finishes.');
+    // Unconfirmed: the shelf reloads.
+    await page.unroute(`**${DELETE}`);
+    await page.route(`**${DELETE}`,item=>item.abort());
+    await openReview(page);await review(page).getByRole('button',{name:'Delete 1 prompt',exact:true}).click();
+    await expect(toast(page)).toHaveText('The server did not confirm the change. The Library was reloaded: check the shelf and Show archived prompts.');
+    await expect(page.locator('#library-bulkbar')).toBeEmpty();
+    await page.unroute(`**${DELETE}`);
+    // A restore the page has not seen: the review opened before it is refused on the server.
+    await box(page,dog.id).check();await openReview(page);
+    const backup=await request.get('/prompt_manager/backup');await expect(backup).toBeOK();const buffer=await backup.body();
+    const restore=await unseenRestore(page,()=>request.post('/prompt_manager/restore',{multipart:{database_file:{name:'library.db',mimeType:'application/octet-stream',buffer}}}));
+    await expect(restore).toBeOK();
+    await review(page).getByRole('button',{name:'Delete 1 prompt',exact:true}).click();
+    await expect(toast(page)).toHaveText('The library was restored or moved since this page loaded. Nothing was deleted or archived.');
+    expect(byText(await items(request),'Dog landscape')).toBeDefined();
+});
+
+test('a failed review keeps the selection, and a selection nothing can change opens the close-only review',async({page,request})=>{
+    const before=await items(request);const guarded=byText(before,'Library extra 0000');
+    await expect(await request.post('/prompt_manager/bulk/tags',{data:{prompt_ids:[guarded.id],tags:['__protected__']}})).toBeOK();
+    await page.goto(route);await expect(cards(page)).toHaveCount(before.length);
+    await box(page,guarded.id).check();
+    await page.route(`**${PREVIEW}`,item=>item.fulfill({status:500,contentType:'application/json',body:JSON.stringify({success:false,code:'review-failed',error:'x'})}),{times:1});
+    await bar(page).getByRole('button',{name:'Delete…',exact:true}).click();
+    await expect(toast(page)).toHaveText('The selected prompts could not be reviewed. Try again.');
+    await expect(box(page,guarded.id)).toBeChecked();
+    await expect(bar(page).getByRole('button',{name:'Delete…',exact:true})).not.toHaveAttribute('aria-disabled','true');
+    await openReview(page);
+    await expect(review(page)).toHaveAccessibleName('Delete selected prompts');
+    await expect(review(page).locator('p.small').last()).toHaveText('None of the selected prompts can be deleted or archived.');
+    await expect(review(page).locator('.dialog-actions > button')).toHaveText(['Close']);
+    await review(page).getByRole('button',{name:'Close',exact:true}).click();
+    await expect(bar(page).getByRole('button',{name:'Delete…',exact:true})).not.toHaveAttribute('aria-disabled','true');
+    expect(byText(await items(request),'Library extra 0000')).toBeDefined();
+});
diff --git a/tests/browser/workspace-library-editor.spec.mjs b/tests/browser/workspace-library-editor.spec.mjs
index 42def0d0..2a17b3e3 100644
--- a/tests/browser/workspace-library-editor.spec.mjs
+++ b/tests/browser/workspace-library-editor.spec.mjs
@@ -493,13 +493,15 @@ test('a restore seen finishing keeps New prompt open and reloads the Library aft
 test('library heading offers Export then + New prompt, and New opens the saved prompt history',async({page,request})=>{
     await page.goto(`${workspace}#/library`);await expect(page.locator('article[data-prompt-id]').first()).toBeVisible();
     const actions=headingActions(page).locator('button');
-    expect(await visibleNames(actions)).toEqual(['Export','+ New prompt']);
+    // D152 (#443): Show archived prompts (N) comes first, a plain toggle.
+    expect(await visibleNames(actions)).toEqual(['Show archived prompts (0)','Export','+ New prompt']);
+    await expect(actions.nth(0)).toHaveAttribute('aria-pressed','false');await expect(actions.nth(0)).not.toHaveClass(/ca-primary/);
     // One image is counted in the singular.
     const f=page.fixture;await expect(page.locator(`article[data-prompt-id="${f.positive_id}"]`).getByText('1 image',{exact:true})).toHaveCount(1);
-    await expect(actions.nth(0)).toHaveAccessibleName('Export full Library JSON');await expect(actions.nth(0)).not.toHaveClass(/ca-primary/);
-    await expect(actions.nth(1)).toHaveClass(/\bca-primary\b/);
-    for(const index of [0,1])expect((await actions.nth(index).boundingBox()).height).toBeGreaterThanOrEqual(32);
-    await actions.nth(1).click();const dialog=editorDialog(page);await expect(dialog.getByRole('heading',{name:'New prompt',exact:true})).toBeVisible();await ready(dialog);
+    await expect(actions.nth(1)).toHaveAccessibleName('Export full Library JSON');await expect(actions.nth(1)).not.toHaveClass(/ca-primary/);
+    await expect(actions.nth(2)).toHaveClass(/\bca-primary\b/);
+    for(const index of [0,1,2])expect((await actions.nth(index).boundingBox()).height).toBeGreaterThanOrEqual(32);
+    await actions.nth(2).click();const dialog=editorDialog(page);await expect(dialog.getByRole('heading',{name:'New prompt',exact:true})).toBeVisible();await ready(dialog);
     await field(dialog,'Title').fill('Harbor at dawn');await field(dialog,'Positive prompt').fill('A quiet harbor at dawn');await field(dialog,'Negative prompt (optional)').fill('fog, noise');
     await button(dialog,'Save').click();await expect(dialog).toHaveCount(0);
     const created=(await(await request.get('/prompt_manager/library?text=quiet%20harbor')).json()).items[0];
diff --git a/tests/browser/workspace-library-selection.spec.mjs b/tests/browser/workspace-library-selection.spec.mjs
index d92eeb76..517973db 100644
--- a/tests/browser/workspace-library-selection.spec.mjs
+++ b/tests/browser/workspace-library-selection.spec.mjs
@@ -62,7 +62,8 @@ test('Set category writes the selected prompts on the server, reloads the shelf
     await box(page,first.id).check();await expect(bar(page).locator('strong')).toHaveText('1 selected');
     await box(page,second.id).check();await expect(bar(page).locator('strong')).toHaveText('2 selected');
     // Two of three loaded are checked, so Select all N loaded follows the count (D151, #444 ruling).
-    await expect(bar(page).getByRole('button')).toHaveText([`Select all ${items.length} loaded`,'Add tags','Set category','Clear']);
+    // D152 (#443) adds Delete… before Clear.
+    await expect(bar(page).getByRole('button')).toHaveText([`Select all ${items.length} loaded`,'Add tags','Set category','Delete…','Clear']);
     await setCategory(page,'  Studio set  ');
     await expect(toast(page)).toHaveText('Category “Studio set” set on 2 prompts.');
     await expect(dialog(page)).toHaveCount(0);
@@ -287,7 +288,7 @@ test('Ctrl/Cmd+A and Select all N loaded select every loaded prompt, windowed on
     let release;const held=new Promise(resolve=>{release=resolve;});
     await page.route('**/prompt_manager/bulk/tags',async route=>{await held;await route.continue();},{times:1});
     await addTags(page,'everyone');
-    for(const name of ['Add tags','Set category',`Select all ${all} loaded`]) await expect(bar(page).getByRole('button',{name,exact:true})).toHaveAttribute('aria-disabled','true');
+    for(const name of ['Add tags','Set category','Delete…','Clear',`Select all ${all} loaded`]) await expect(bar(page).getByRole('button',{name,exact:true})).toHaveAttribute('aria-disabled','true');
     release();
     await expect(toast(page)).toHaveText(`Added “everyone” to ${all-1} prompts.`);
     expect(writes).toHaveLength(1);expect(new Set(writes[0].prompt_ids).size).toBe(all-1);
diff --git a/tests/browser/workspace-system-backups.spec.mjs b/tests/browser/workspace-system-backups.spec.mjs
index 3a0404d4..fecbdbcc 100644
--- a/tests/browser/workspace-system-backups.spec.mjs
+++ b/tests/browser/workspace-system-backups.spec.mjs
@@ -11,8 +11,8 @@ const STATUS_URL = '/prompt_manager/backup/status';
 const PREVIEW_URL = '/prompt_manager/restore/preview';
 const APPLY_URL = '/prompt_manager/restore/apply';
 const WHEN = { dateStyle: 'medium', timeStyle: 'short' };
-const SAFETY_DESCRIPTION = 'Keep a verified copy of the database on disk before maintenance, cleanups and LoRA imports change ' +
-    'records. A restore always keeps one.';
+const SAFETY_DESCRIPTION = 'Keep a verified copy of the database on disk before maintenance, cleanups, LoRA imports and ' +
+    'prompt deletes change records. A restore always keeps one.';
 
 test.use({ locale: 'en-US', timezoneId: 'UTC' });
 
diff --git a/tests/fixtures/legacy_contract_snapshot.json b/tests/fixtures/legacy_contract_snapshot.json
index 4d3dc248..1bed157e 100644
--- a/tests/fixtures/legacy_contract_snapshot.json
+++ b/tests/fixtures/legacy_contract_snapshot.json
@@ -132,6 +132,9 @@
     "POST /prompt_manager/jobs/thumbnails",
     "POST /prompt_manager/jobs/{job_id}/cancel",
     "POST /prompt_manager/library",
+    "POST /prompt_manager/library/delete",
+    "POST /prompt_manager/library/delete/preview",
+    "POST /prompt_manager/library/restore",
     "POST /prompt_manager/library/{positive_id}/variants",
     "POST /prompt_manager/logs/config",
     "POST /prompt_manager/logs/truncate",
diff --git a/tests/js/workspace-library-delete.test.js b/tests/js/workspace-library-delete.test.js
new file mode 100644
index 00000000..b80eb68e
--- /dev/null
+++ b/tests/js/workspace-library-delete.test.js
@@ -0,0 +1,150 @@
+const test = require('node:test');
+const assert = require('node:assert/strict');
+
+// #443 D152: the Prompt library's Delete… review (delete unpaired, archive paired, keep protected) and Restore.
+const source = import('../../web/js/workspace/library-delete.mjs');
+
+const preview = (patch = {}) => ({success: true, library_epoch: 'e', delete: [], archive: [], protected: [],
+    already_archived: 0, not_found: 0, image_links: 0, backup: 'on', disk: null, ...patch});
+
+test('the routes are the workspace ones, never the legacy bulk delete', async () => {
+    const {PREVIEW_URL, DELETE_URL, RESTORE_URL} = await source;
+    assert.equal(PREVIEW_URL, '/prompt_manager/library/delete/preview');
+    assert.equal(DELETE_URL, '/prompt_manager/library/delete');
+    assert.equal(RESTORE_URL, '/prompt_manager/library/restore');
+});
+
+test('the title, primary and body follow what the review will do', async () => {
+    const {reviewOf, reviewTitle, primaryLabel, deleteBody} = await source;
+    const both = reviewOf(preview({delete: [1, 2], archive: [3]}));
+    assert.equal(reviewTitle(both), 'Delete or archive selected prompts');
+    assert.equal(primaryLabel(both), 'Delete 2 and archive 1 prompt');
+    assert.deepEqual(deleteBody(both), {archive_ids: [3], delete_ids: [1, 2], expected_epoch: 'e', backup: 'on'});
+    const onlyDelete = reviewOf(preview({delete: [1]}));
+    assert.equal(reviewTitle(onlyDelete), 'Delete selected prompts');
+    assert.equal(primaryLabel(onlyDelete), 'Delete 1 prompt');
+    const onlyArchive = reviewOf(preview({archive: [4, 5]}));
+    assert.equal(reviewTitle(onlyArchive), 'Archive selected prompts');
+    assert.equal(primaryLabel(onlyArchive), 'Archive 2 prompts');
+});
+
+test('the grid shows each row only when it applies, with protected titles in selection order', async () => {
+    const {reviewOf, reviewGrid} = await source;
+    const names = {7: 'Seven', 8: 'Eight', 9: 'Nine', 10: 'Ten'};
+    const review = reviewOf(preview({delete: [1], archive: [2], protected: [7, 8, 9, 10], already_archived: 1,
+        not_found: 2, image_links: 3}));
+    assert.deepEqual(reviewGrid(review, id => names[id]), [
+        ['Delete permanently', '1 prompt not in a saved pair'],
+        ['Archive', '1 prompt in a saved pair: hidden, restorable'],
+        ['Protected (kept)', '4: Seven, Eight, Nine and 1 more'],
+        ['Already archived', '1'],
+        ['No longer exist', '2'],
+        ['Image links removed', '3 images will no longer show these prompts (files stay on disk)'],
+        ['Backup', 'Create and verify before deleting'],
+    ]);
+    const archiveOnly = reviewOf(preview({archive: [2]}));
+    assert.deepEqual(reviewGrid(archiveOnly).map(([term]) => term), ['Delete permanently', 'Archive']);
+    const off = reviewOf(preview({delete: [1], backup: 'off'}));
+    assert.equal(reviewGrid(off).at(-1)[1], 'Off: no safety backup (System › Backup & export › Recovery policy)');
+});
+
+test('the Archive row names the saved pair, never negative variants, for one or many prompts', async () => {
+    const {reviewOf, reviewGrid} = await source;
+    // A saved-pair prompt with 0 negative variants (live prompt 7901) is archive-only for its pair, not for variants.
+    const one = reviewGrid(reviewOf(preview({archive: [2]}))).find(([term]) => term === 'Archive');
+    assert.deepEqual(one, ['Archive', '1 prompt in a saved pair: hidden, restorable']);
+    const many = reviewGrid(reviewOf(preview({archive: [2, 3, 4]}))).find(([term]) => term === 'Archive');
+    assert.deepEqual(many, ['Archive', '3 prompts in a saved pair: hidden, restorable']);
+    for (const [, value] of [one, many]) assert.doesNotMatch(value, /variant/);
+});
+
+test('the sentences explain archive, irreversibility per backup policy, re-creation and protection', async () => {
+    const {reviewOf, reviewSentences} = await source;
+    const [archive, remove, guarded] = reviewSentences(reviewOf(preview({delete: [1], archive: [2], protected: [3]})));
+    // Live test (#470): the archive reason is the saved pair, which a prompt with 0 negative variants has too.
+    assert.match(archive, /^Prompts in a saved pair, as its positive or its negative, are archived instead of deleted, so the pair and its runs stay intact\./);
+    assert.doesNotMatch(archive, /variant/);
+    assert.match(archive, /Archived prompts cannot be deleted\. To bring them back, press Show archived prompts/);
+    assert.match(remove, /the only way back is to restore the safety backup taken first \(System › Backup & export\), which returns the whole library to that moment\. It is kept among the last 10 safety backups\./);
+    assert.match(remove, /A later scan, a new image or a node run with the same text adds it again as a new prompt\.$/);
+    assert.equal(guarded, 'Protected prompts are tagged __protected__; remove the tag to delete them.');
+    const [off] = reviewSentences(reviewOf(preview({delete: [1], backup: 'off'})));
+    assert.match(off, /Deleted prompts cannot be brought back\. Image files/);
+    assert.doesNotMatch(off, /safety backup/);
+});
+
+test('a review that cannot start says why: nothing to change, or no room for the backup', async () => {
+    const {reviewOf, blockedReason, COPY} = await source;
+    assert.equal(blockedReason(reviewOf(preview({protected: [1]}))), COPY.none);
+    assert.equal(blockedReason(reviewOf(preview({delete: [1], disk: {sufficient: false, message: 'Not enough. Nothing was changed.'}}))),
+        'Not enough. Nothing was changed.');
+    assert.match(blockedReason(reviewOf(preview({delete: [1], disk: {sufficient: false}}))), /not enough free space/);
+    assert.equal(blockedReason(reviewOf(preview({delete: [1], disk: {sufficient: true}}))), null);
+    assert.equal(blockedReason(reviewOf(preview({archive: [1]}))), null);
+});
+
+test('a delete outcome counts each part, singular and plural, and names the backup', async () => {
+    const {reviewOf, deleteOutcome} = await source;
+    const review = reviewOf(preview({delete: [1, 2], archive: [3], protected: [9]}));
+    assert.deepEqual(deleteOutcome({success: true, deleted: 2, archived: 3, already_archived: 0, not_found: 0, changed: 0,
+        backup: 'prompts.db.backup_x'}, null, review), {committed: true, reload: true,
+        toast: 'Deleted 2 prompts. Archived 3 prompts. 1 protected prompt was kept. Safety backup saved: prompts.db.backup_x (System › Backup & export).'});
+    assert.equal(deleteOutcome({success: true, deleted: 1, archived: 0, already_archived: 1, not_found: 1, changed: 1,
+        backup: null}, null, reviewOf(preview())).toast,
+    'Deleted 1 prompt. 1 was already archived. 1 no longer exists. 1 changed since the review and was kept.');
+    assert.equal(deleteOutcome({success: true, deleted: 0, archived: 0, already_archived: 2, not_found: 3, changed: 2,
+        backup: null}, null, reviewOf(preview({protected: [1, 2]}))).toast,
+    'Nothing was deleted or archived. 2 were already archived. 3 no longer exist. 2 changed since the review and were kept. 2 protected prompts were kept. The Library was reloaded.');
+    assert.equal(deleteOutcome({success: true, deleted: 0, archived: 0}, null, reviewOf(preview())).committed, false);
+});
+
+test('a failed delete says nothing changed, or that it may have, and keeps or reloads the selection', async () => {
+    const {deleteOutcome, COPY} = await source;
+    assert.deepEqual(deleteOutcome(null, {status: 409, code: 'storage-changed'}), {toast: COPY.storage, committed: false, reload: true});
+    assert.equal(COPY.storage, 'The library was restored or moved since this page loaded. Nothing was deleted or archived.');
+    assert.deepEqual(deleteOutcome(null, {status: 409, code: 'busy', running: {title: 'Scan'}}),
+        {toast: 'Scan is running. Nothing was changed; try again when it finishes.', committed: false, reload: false});
+    assert.deepEqual(deleteOutcome(null, {status: 500, code: 'backup-failed', message: 'The safety backup could not be taken and verified; nothing was changed.'}),
+        {toast: 'The safety backup failed. The safety backup could not be taken and verified; nothing was changed.', committed: false, reload: false});
+    assert.deepEqual(deleteOutcome(null, {status: 507, code: 'insufficient-space', message: 'Not enough free disk space. Nothing was changed.'}),
+        {toast: 'Not enough free disk space. Nothing was changed.', committed: false, reload: false});
+    for (const failure of [new TypeError('Failed to fetch'), {status: 502}, {status: 503}, {status: 504}]) {
+        assert.deepEqual(deleteOutcome(null, failure), {toast: COPY.unconfirmed, committed: true, reload: true});
+    }
+    assert.deepEqual(deleteOutcome(null, {status: 400}), {toast: COPY.failed, committed: false, reload: false});
+});
+
+test('a failed preview reloads only after a restore; Restore outcomes have their own words', async () => {
+    const {previewOutcome, restoreOutcome, COPY} = await source;
+    assert.deepEqual(previewOutcome({status: 409, code: 'storage-changed'}), {toast: COPY.storage, committed: false, reload: true});
+    assert.deepEqual(previewOutcome({status: 500}), {toast: COPY.reviewFailed, committed: false, reload: false});
+    assert.equal(previewOutcome({status: 409, code: 'busy', running: {title: 'Optimize'}}).toast,
+        'Optimize is running. Nothing was changed; try again when it finishes.');
+    assert.deepEqual(restoreOutcome({success: true, restored: 2, unchanged: 1, not_found: 1}, null),
+        {toast: 'Restored 2 prompts to the Prompt library. 1 was not archived. 1 no longer exists.', committed: true, reload: true});
+    assert.deepEqual(restoreOutcome({success: true, restored: 0, unchanged: 2, not_found: 0}, null),
+        {toast: 'No prompt was restored. 2 were not archived.', committed: false, reload: true});
+    assert.deepEqual(restoreOutcome(null, {status: 409, code: 'storage-changed'}), {toast: COPY.restoreStorage, committed: false, reload: true});
+    assert.deepEqual(restoreOutcome(null, {status: 503}), {toast: COPY.restoreUnconfirmed, committed: true, reload: true});
+    assert.deepEqual(restoreOutcome(null, {status: 400}), {toast: COPY.restoreFailed, committed: false, reload: false});
+});
+
+test('reviewOf keeps only well-formed ids and counts from an answer', async () => {
+    const {reviewOf} = await source;
+    const review = reviewOf({library_epoch: 3, delete: [1, 'x', -2, 2], archive: null, protected: [1.5], already_archived: -1,
+        not_found: 'x', image_links: 2, backup: 'maybe'});
+    assert.deepEqual(review, {epoch: null, delete: [1, 2], archive: [], protected: [], alreadyArchived: 0, notFound: 0,
+        imageLinks: 2, backup: 'on', disk: null});
+});
+
+test('the archived notice says why (the saved pair) and names negative variants only when there are any', async () => {
+    const {archivedNoticeText} = await source;
+    assert.equal(archivedNoticeText(0), 'This prompt is archived because it is in a saved pair. It is hidden from the Prompt ' +
+        'library; nothing was removed.');
+    assert.equal(archivedNoticeText(1), 'This prompt is archived because it is in a saved pair. It and its 1 negative variant ' +
+        'are hidden from the Prompt library; nothing was removed.');
+    assert.equal(archivedNoticeText(3), 'This prompt is archived because it is in a saved pair. It and its 3 negative variants ' +
+        'are hidden from the Prompt library; nothing was removed.');
+    // An unknown count (an older server) never claims variants.
+    assert.equal(archivedNoticeText(undefined), archivedNoticeText(0));
+});
diff --git a/tests/test_bulk_library_delete.py b/tests/test_bulk_library_delete.py
new file mode 100644
index 00000000..35b9abe6
--- /dev/null
+++ b/tests/test_bulk_library_delete.py
@@ -0,0 +1,525 @@
+"""#443 (D152): delete selected Library prompts; paired ones are archived.
+
+The DB commands, and what every reader does with an archived parent.
+"""
+
+import re
+import sqlite3
+import tempfile
+import unittest
+from pathlib import Path
+
+from database.execution_history_schema import rotate_history_epoch
+from database.library_commands import LibraryCommandError
+from database.library_folders import folder_prefixes
+from database.operations import PromptDatabase
+from database.prompt_archive import TABLE as ARCHIVE
+from utils.hashing import generate_prompt_hash
+
+
+def save(db, text, **metadata):
+    return db.save_prompt(text, prompt_hash=generate_prompt_hash(text), **metadata)
+
+
+def rows(db, sql, params=()):
+    with db.model.get_connection() as conn:
+        return [tuple(row) for row in conn.execute(sql, params).fetchall()]
+
+
+def archived_ids(db):
+    return sorted(row[0] for row in rows(db, f"SELECT prompt_id FROM {ARCHIVE}"))
+
+
+def prompt_ids(db):
+    return sorted(row[0] for row in rows(db, "SELECT id FROM prompts"))
+
+
+_STAMP = re.compile(r"^\d{4}-\d{2}-\d{2}[T ]\d{2}:\d{2}:\d{2}")
+
+
+def _stable(value):
+    return "<time>" if isinstance(value, str) and _STAMP.match(value) else value
+
+
+def table_dump(db):
+    """Every row of every table (times masked), to compare two databases."""
+    tables = [
+        row[0]
+        for row in rows(
+            db,
+            "SELECT name FROM sqlite_master WHERE type='table' "
+            "AND name NOT LIKE 'sqlite_%' AND name!='execution_history_metadata' "
+            "ORDER BY name",
+        )
+    ]
+    dump = {}
+    for table in tables:
+        dump[table] = sorted(
+            (tuple(map(_stable, row)) for row in rows(db, f"SELECT * FROM {table}")),
+            key=repr,
+        )
+    return dump
+
+
+class LibraryDeleteCase(unittest.TestCase):
+    def setUp(self):
+        self.temp = tempfile.TemporaryDirectory()
+        self.root = Path(self.temp.name)
+        self.db = PromptDatabase(str(self.root / "delete.db"))
+        self.epoch = self.db.get_library_options()["library_epoch"]
+
+    def tearDown(self):
+        self.db.close_all()
+        self.temp.cleanup()
+
+    def paired(self, positive, negative="blur"):
+        pair = self.db.save_prompt_pair(positive, negative)
+        found = self.db.get_prompt_pair(pair)
+        return found["positive_prompt_id"], found["negative_prompt_id"], pair
+
+    def image(self, prompt_id, name):
+        path = self.root / name
+        path.write_bytes(b"png")
+        return self.db.link_image_to_prompt(prompt_id, str(path))
+
+    def apply(self, ids, epoch=None, review=None):
+        """Review ``ids`` (or use ``review``), then write what was reviewed."""
+        review = review or self.classify(ids)
+        return self.db.archive_or_delete_library_prompts(
+            review["archive"],
+            review["delete"],
+            expected_epoch=epoch or self.epoch,
+            candidates=review["fingerprints"],
+        )
+
+    def classify(self, ids, epoch=None):
+        return self.db.classify_library_delete(ids, expected_epoch=epoch or self.epoch)
+
+    def restore(self, ids, epoch=None):
+        return self.db.restore_library_prompts(ids, expected_epoch=epoch or self.epoch)
+
+
+class TestClassifyAndApply(LibraryDeleteCase):
+    def test_each_class_in_order(self):
+        plain = save(self.db, "Plain")
+        protected = save(self.db, "Guarded", tags=["__protected__"])
+        protected_paired, _neg, _pair = self.paired("Guarded pair")
+        self.db.bulk_add_tags([protected_paired], ["__protected__"])
+        positive, negative_only, _pair = self.paired("Cat", "only negative")
+        both = save(self.db, "Both roles")
+        self.image(both, "both.png")  # a parent through its image
+        self.db.save_prompt_pair("Other", "Both roles")
+        archived_pair_positive, _n, old_pair = self.paired("Old")
+        self.db.archive_prompt_pair(old_pair, True)
+        already, _n2, _p2 = self.paired("Already")
+        self.apply([already])
+        self.image(plain, "plain.png")
+        ids = [
+            plain,
+            protected,
+            protected_paired,
+            positive,
+            negative_only,
+            both,
+            archived_pair_positive,
+            already,
+            99999,
+        ]
+        result = self.classify(ids)
+        self.assertEqual(
+            result,
+            {
+                "library_epoch": self.epoch,
+                "delete": [plain],
+                "archive": [positive, both, archived_pair_positive],
+                "protected": [protected, protected_paired],
+                "already_archived": [already],
+                "not_found": [negative_only, 99999],
+                "image_links": 1,
+                "fingerprints": result["fingerprints"],
+            },
+        )
+        self.assertEqual(list(result["fingerprints"]), [plain])
+
+    def test_apply_archives_paired_deletes_unpaired_and_skips_protected(self):
+        plain = save(self.db, "Plain", tags=["red"])
+        protected = save(self.db, "Guarded", tags=["__protected__"])
+        positive, negative, pair = self.paired("Cat")
+        self.image(plain, "a.png")
+        self.image(positive, "b.png")
+        before = rows(self.db, "SELECT updated_at FROM prompts WHERE id=?", (positive,))
+        result = self.apply([plain, protected, positive, 99999])
+        self.assertEqual(
+            result,
+            {
+                "library_epoch": self.epoch,
+                "deleted": 1,
+                "archived": 1,
+                "already_archived": 0,
+                "not_found": 0,
+                "changed": 0,
+                "image_links": 1,
+            },
+        )
+        self.assertEqual(prompt_ids(self.db), sorted([protected, positive, negative]))
+        self.assertEqual(archived_ids(self.db), [positive])
+        # Archive keeps everything: the pair, its image link and the prompt row.
+        self.assertEqual(
+            len(rows(self.db, "SELECT 1 FROM prompt_pairs WHERE id=?", (pair,))), 1
+        )
+        self.assertEqual(
+            len(
+                rows(
+                    self.db,
+                    "SELECT 1 FROM generated_images WHERE prompt_id=?",
+                    (positive,),
+                )
+            ),
+            1,
+        )
+        after = rows(self.db, "SELECT updated_at FROM prompts WHERE id=?", (positive,))
+        self.assertNotEqual(before, after)
+        # The image file stays on disk.
+        self.assertTrue((self.root / "a.png").exists())
+
+    def test_delete_has_exactly_the_legacy_row_effects(self):
+        twin = PromptDatabase(str(self.root / "twin.db"))
+        self.addCleanup(twin.close_all)
+        twin_epoch = twin.get_library_options()["library_epoch"]
+        for db in (self.db, twin):
+            a = save(db, "Alpha", tags=["x", "y"], category="c")
+            save(db, "Beta")
+            path = self.root / "shared.png"
+            path.write_bytes(b"png")
+            db.link_image_to_prompt(a, str(path), {"workflow": {"nodes": []}})
+        self.db.bulk_delete_prompts([a])
+        twin.archive_or_delete_library_prompts(
+            [], [a], expected_epoch=twin_epoch, candidates=None
+        )
+        self.assertEqual(table_dump(self.db), table_dump(twin))
+
+    def test_already_archived_and_restore(self):
+        positive, _neg, _pair = self.paired("Cat")
+        self.apply([positive])
+        again = self.classify([positive])
+        self.assertEqual(
+            (again["archive"], again["already_archived"]), ([], [positive])
+        )
+        # Archived between the review and the write: counted, not archived twice.
+        other, _n, _p = self.paired("Dog")
+        review = self.classify([other])
+        self.apply([other])
+        late = self.apply([], review=review)
+        self.assertEqual((late["archived"], late["already_archived"]), (0, 1))
+        plain = save(self.db, "Plain")
+        result = self.restore([positive, plain, 99999])
+        self.assertEqual(
+            result,
+            {
+                "library_epoch": self.epoch,
+                "restored": 1,
+                "unchanged": 1,
+                "not_found": 1,
+            },
+        )
+        self.assertEqual(archived_ids(self.db), [other])
+
+    def test_the_write_executes_only_what_was_reviewed(self):
+        plain = save(self.db, "Plain")
+        guarded = save(self.db, "Guarded later")
+        touched = save(self.db, "Touched later")
+        review = self.classify([plain, guarded, touched])
+        # Between the review and the write: one becomes protected, one is used.
+        self.db.bulk_add_tags([guarded], ["__protected__"])
+        self.db.record_prompt_use(touched)
+        result = self.apply([], review=review)
+        self.assertEqual((result["deleted"], result["changed"]), (1, 2))
+        self.assertEqual(prompt_ids(self.db), sorted([guarded, touched]))
+        self.assertEqual(archived_ids(self.db), [])
+
+    def test_a_new_image_link_after_the_review_keeps_the_prompt(self):
+        plain = save(self.db, "Plain")
+        review = self.classify([plain])
+        self.image(plain, "late.png")
+        self.assertEqual(self.apply([], review=review)["changed"], 1)
+        self.assertIn(plain, prompt_ids(self.db))
+
+    def test_reviewed_deletes_without_a_backup_are_kept(self):
+        plain = save(self.db, "Plain")
+        review = self.classify([plain])
+        result = self.db.archive_or_delete_library_prompts(
+            [], [plain], expected_epoch=self.epoch, candidates={}
+        )
+        self.assertEqual((result["deleted"], result["changed"]), (0, 1))
+        self.assertEqual(review["delete"], [plain])
+
+    def test_a_reviewed_delete_that_became_paired_is_archived(self):
+        plain = save(self.db, "Plain")
+        review = self.classify([plain])
+        self.db.save_prompt_pair("Plain", "late negative")
+        result = self.apply([], review=review)
+        self.assertEqual((result["deleted"], result["archived"]), (0, 1))
+
+    def test_a_reviewed_archive_that_lost_its_pair_is_archived_not_deleted(self):
+        positive, _negative, pair = self.paired("Cat")
+        review = self.classify([positive])
+        self.db.delete_prompt_pair(pair)
+        result = self.apply([], review=review)
+        self.assertEqual((result["deleted"], result["archived"]), (0, 1))
+        self.assertEqual(archived_ids(self.db), [positive])
+
+    def test_one_id_in_both_lists_or_no_ids_is_refused(self):
+        plain = save(self.db, "Plain")
+        for archive, delete in (([plain], [plain]), ([], [])):
+            with self.subTest(archive=archive, delete=delete):
+                with self.assertRaises(ValueError):
+                    self.db.archive_or_delete_library_prompts(
+                        archive, delete, expected_epoch=self.epoch, candidates=None
+                    )
+
+    def test_archiving_repairs_a_missing_or_stale_hash(self):
+        missing, _n1, _p1 = self.paired("Hashless")
+        stale, _n2, _p2 = self.paired("Stale hash")
+        with self.db.model.get_connection() as conn:
+            conn.execute("UPDATE prompts SET hash=NULL WHERE id=?", (missing,))
+            conn.execute("UPDATE prompts SET hash='stale' WHERE id=?", (stale,))
+        self.apply([missing, stale])
+        for pid, text in ((missing, "Hashless"), (stale, "Stale hash")):
+            self.assertEqual(
+                rows(self.db, "SELECT hash FROM prompts WHERE id=?", (pid,)),
+                [(generate_prompt_hash(text),)],
+            )
+            # So every ingestion lookup finds the archived row.
+            self.assertEqual(save(self.db, text), pid)
+
+    def test_a_canonical_hash_another_row_holds_is_left_alone(self):
+        stale, _n, _p = self.paired("Twin text")
+        with self.db.model.get_connection() as conn:
+            conn.execute("UPDATE prompts SET hash='stale' WHERE id=?", (stale,))
+        twin = save(self.db, "twin text")
+        self.apply([stale])
+        self.assertEqual(
+            rows(self.db, "SELECT hash FROM prompts WHERE id=?", (stale,)), [("stale",)]
+        )
+        self.assertEqual(save(self.db, "Twin text"), twin)
+
+    def test_restore_unhides_protected_and_non_parent_archived_prompts(self):
+        guarded, _n, _p = self.paired("Guarded")
+        self.apply([guarded])
+        self.db.bulk_add_tags([guarded], ["__protected__"])
+        negative_only = save(self.db, "Only a negative")
+        self.db.save_prompt_pair("Owner", "Only a negative")
+        with self.db.model.get_connection() as conn:
+            conn.execute(
+                f"INSERT INTO {ARCHIVE} VALUES (?, '2026-10-28T00:00:00+00:00')",
+                (negative_only,),
+            )
+        result = self.restore([guarded, negative_only])
+        self.assertEqual(result["restored"], 2)
+        self.assertEqual(archived_ids(self.db), [])
+
+    def test_restored_storage_changes_nothing(self):
+        plain = save(self.db, "Plain")
+        positive, _neg, _pair = self.paired("Cat")
+        rotate_history_epoch(self.db.model.get_connection())
+        for call in (
+            lambda: self.apply([plain, positive]),
+            lambda: self.classify([plain]),
+            lambda: self.restore([positive]),
+        ):
+            with self.assertRaises(LibraryCommandError) as caught:
+                call()
+            self.assertEqual(caught.exception.code, "storage-changed")
+        self.assertIn(plain, prompt_ids(self.db))
+        self.assertEqual(archived_ids(self.db), [])
+
+    def test_a_failure_mid_write_rolls_everything_back(self):
+        plain = save(self.db, "Plain")
+        positive, _neg, _pair = self.paired("Cat")
+        with self.db.model.get_connection() as conn:
+            conn.execute(
+                "CREATE TRIGGER fail_delete BEFORE DELETE ON prompts "
+                "BEGIN SELECT RAISE(ABORT, 'boom'); END"
+            )
+        with self.assertRaises(sqlite3.DatabaseError):
+            self.apply([positive, plain])
+        self.assertIn(plain, prompt_ids(self.db))
+        self.assertEqual(archived_ids(self.db), [])
+
+    def test_many_ids_are_handled_in_batches(self):
+        ids = [save(self.db, f"Many {i}") for i in range(1000)]
+        result = self.apply(ids)
+        self.assertEqual(result["deleted"], 1000)
+
+    def test_rejects_invalid_arguments(self):
+        plain = save(self.db, "Plain")
+        for ids, epoch in (([], self.epoch), ([True], self.epoch), ([plain], "x")):
+            for call in (self.apply, self.classify, self.restore):
+                with self.subTest(ids=ids, epoch=epoch, call=call.__name__):
+                    with self.assertRaises(ValueError):
+                        call(ids, epoch)
+
+
+class TestArchivedReaders(LibraryDeleteCase):
+    """What each reader does with an archived parent (design §4.4)."""
+
+    def setUp(self):
+        super().setUp()
+        self.kept, _kn, _kp = self.paired("Kept cat", "kept blur")
+        self.gone, _gn, _gp = self.paired("Gone cat", "gone blur")
+        for pid, category, tag in ((self.kept, "keep", "k"), (self.gone, "gone", "g")):
+            self.db.update_prompt_metadata(pid, category=category, tags=[tag])
+        self.apply([self.gone])
+
+    def ids_of(self, page):
+        return [item["id"] for item in page["items"]]
+
+    def test_listing_search_and_totals(self):
+        active = self.db.list_library()
+        self.assertEqual(self.ids_of(active), [self.kept])
+        self.assertEqual(
+            (active["total"], active["variant_total"], active["archived_total"]),
+            (1, 1, 1),
+        )
+        archived = self.db.list_library(shelf="archived")
+        self.assertEqual(self.ids_of(archived), [self.gone])
+        self.assertEqual((archived["total"], archived["variant_total"]), (1, 1))
+        self.assertEqual(self.ids_of(self.db.list_library(text="Gone")), [])
+        self.assertEqual(
+            self.ids_of(self.db.list_library(text="Gone", shelf="archived")),
+            [self.gone],
+        )
+        self.assertEqual(self.ids_of(self.db.list_library(tags=["g"])), [])
+        self.assertEqual(self.db.list_library(category="gone")["archived_total"], 1)
+        with self.assertRaises(ValueError):
+            self.db.list_library(shelf="all")
+
+    def test_the_444_filters_and_tag_counts_hide_it(self):
+        # #444's folder filter, tag match and tag ranking keep #443's shelves.
+        bare, _bn, _bp = self.paired("Bare cat", "bare blur")
+        self.apply([bare])
+        folder = self.root / "out" / "cats"
+        folder.mkdir(parents=True)
+        for pid, name in ((self.kept, "kept.png"), (self.gone, "gone.png")):
+            self.image(pid, str(Path("out") / "cats" / name))
+        prefixes = folder_prefixes([str(self.root / "out")], "cats")
+        self.assertEqual(
+            self.ids_of(self.db.list_library(folder_prefixes=prefixes)), [self.kept]
+        )
+        self.assertEqual(
+            self.ids_of(
+                self.db.list_library(folder_prefixes=prefixes, shelf="archived")
+            ),
+            [self.gone],
+        )
+        self.assertEqual(
+            self.ids_of(self.db.list_library(tags=["k", "g"], tag_mode="any")),
+            [self.kept],
+        )
+        self.assertEqual(self.ids_of(self.db.list_library(tag_mode="untagged")), [])
+        self.assertEqual(
+            self.ids_of(self.db.list_library(tag_mode="untagged", shelf="archived")),
+            [bare],
+        )
+        tags = self.db.list_vocabulary_tags(sort="prompts")
+        self.assertEqual(
+            {row["name"]: row["prompt_count"] for row in tags["tags"]},
+            {"k": 1, "g": 0},
+        )
+        self.assertEqual(tags["untagged_count"], 0)
+        self.assertEqual(
+            self.db.list_vocabulary_tags(search="g", sort="prompts")["tags"][0][
+                "prompt_count"
+            ],
+            0,
+        )
+
+    def test_detail_and_options(self):
+        self.assertTrue(self.db.get_library_positive(self.gone)["positive"]["archived"])
+        self.assertFalse(
+            self.db.get_library_positive(self.kept)["positive"]["archived"]
+        )
+        # Suggestions keep archived parents' categories: the archived view
+        # filters by them.
+        self.assertEqual(self.db.get_library_options()["categories"], ["gone", "keep"])
+
+    def test_counts(self):
+        self.assertEqual(self.db.library_counts()["positive_prompts"], 1)
+        self.assertEqual(self.db.library_counts()["negative_variants"], 1)
+        tags = {
+            row["name"]: row["prompt_count"]
+            for row in self.db.list_vocabulary_tags()["tags"]
+        }
+        self.assertEqual((tags["k"], tags["g"]), (1, 0))
+        categories = {
+            row["value"]: row["prompt_count"]
+            for row in self.db.list_vocabulary_categories()["categories"]
+        }
+        # A value only archived parents hold stays listed with 0, as a tag does.
+        self.assertEqual(categories, {"keep": 1, "gone": 0})
+
+    def test_restore_summary_and_export(self):
+        from database.restore_stage import library_summary
+
+        summary = library_summary(self.db.model.get_connection())
+        self.assertEqual(summary["positives"], 1)
+        exported = {
+            item["positive_text"]: item["archived"]
+            for item in self.db.export_library()["positives"]
+        }
+        self.assertEqual(exported, {"Kept cat": False, "Gone cat": True})
+
+    def test_usage_statistics_keep_archived_runs(self):
+        self.db.record_prompt_use(self.gone, 3)
+        runs = {row["category"]: row["runs"] for row in self.db.usage_by_category()}
+        self.assertEqual(runs["gone"], 3)
+
+    def test_runs_node_saves_and_new_prompt_find_the_archived_row(self):
+        count = len(prompt_ids(self.db))
+        self.assertTrue(self.db.record_prompt_use(self.gone, 2))
+        existing = self.db.get_prompt_by_hash(generate_prompt_hash("Gone cat"))
+        self.assertEqual(existing["id"], self.gone)
+        self.assertEqual(save(self.db, "Gone cat"), self.gone)
+        self.db.save_prompt_pair("Gone cat", "new blur")
+        self.assertEqual(len(prompt_ids(self.db)), count + 1)  # only the new negative
+        self.assertEqual(archived_ids(self.db), [self.gone])
+
+    def test_legacy_reads_still_list_it_and_legacy_delete_still_refuses(self):
+        from database.pairs import PairDependencyError
+
+        texts = [p["text"] for p in self.db.get_recent_prompts(limit=50)["prompts"]]
+        self.assertIn("Gone cat", texts)
+        with self.assertRaises(PairDependencyError):
+            self.db.bulk_delete_prompts([self.gone])
+
+    def test_as_another_parents_negative_it_stays_a_visible_variant(self):
+        owner, _neg, pair = self.paired("Owner cat", "Gone cat")
+        detail = self.db.get_library_positive(owner)
+        self.assertEqual([v["id"] for v in detail["variants"]], [pair])
+        self.assertEqual(self.ids_of(self.db.list_library(text="Gone")), [owner])
+
+    def test_maintenance_never_prunes_an_archived_prompt(self):
+        lonely = save(self.db, "Lonely")
+        with self.db.model.get_connection() as conn:
+            conn.execute(
+                f"INSERT INTO {ARCHIVE} VALUES (?, '2026-10-28T00:00:00+00:00')",
+                (lonely,),
+            )
+            orphaned = [row[0] for row in conn.execute(self.orphaned_sql()).fetchall()]
+        self.assertNotIn(lonely, orphaned)
+
+    @staticmethod
+    def orphaned_sql():
+        from database.maintenance import ORPHANED_PROMPTS_SQL
+
+        return ORPHANED_PROMPTS_SQL
+
+    def test_bulk_metadata_writes_still_reach_an_archived_parent(self):
+        result = self.db.bulk_set_library_category(
+            [self.gone], "moved", expected_epoch=self.epoch
+        )
+        self.assertEqual(result["updated"], 1)
+
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/tests/test_history_reads.py b/tests/test_history_reads.py
index 73994f3c..29814572 100644
--- a/tests/test_history_reads.py
+++ b/tests/test_history_reads.py
@@ -400,6 +400,32 @@ class HistoryReadTests(unittest.TestCase):
                 pass
         self.assertFalse(conn.in_transaction)
 
+    def test_a_deleted_negative_is_unavailable_and_a_negative_only_one_is_not(self):
+        # #443: a Library delete can remove an unpaired prompt a run used as
+        # its negative. The run's prompt ids are live hints, so a deleted one
+        # reads unavailable; a negative-only prompt stays available.
+        db = self.database()
+        self.saved(db)
+        self.saved(db, "negative", 2)
+        start = self.capture(db)
+        with db.recorded_history_snapshot():
+            context = db.get_history_run(start.run_id)["contexts"][0]
+        self.assertTrue(context["navigation"]["negative_available"])
+        with db.model.get_connection() as conn:
+            conn.execute(
+                "INSERT INTO prompt_pairs(id,positive_prompt_id,negative_prompt_id) "
+                "VALUES(9,1,2)"
+            )
+        with db.recorded_history_snapshot():
+            context = db.get_history_run(start.run_id)["contexts"][0]
+        self.assertTrue(context["navigation"]["negative_available"])
+        with db.model.get_connection() as conn:
+            conn.execute("DELETE FROM prompt_pairs WHERE id=9")
+            conn.execute("DELETE FROM prompts WHERE id=2")
+        with db.recorded_history_snapshot():
+            context = db.get_history_run(start.run_id)["contexts"][0]
+        self.assertFalse(context["navigation"]["negative_available"])
+
     def test_detail_preserves_full_text_snapshots_hints_and_archive(self):
         db = self.database()
         self.saved(db)
diff --git a/tests/test_library.py b/tests/test_library.py
index ef7566c0..24540f24 100644
--- a/tests/test_library.py
+++ b/tests/test_library.py
@@ -345,7 +345,8 @@ class TestLibrary(unittest.TestCase):
         self.assertEqual(
             (parent["title"], parent["notes"]), ("Portrait", "keep\nnotes")
         )
-        self.assertNotIn("archived", parent)
+        # The parent's own archive state (#443), never a pair's.
+        self.assertIs(parent["archived"], False)
         self.assertRegex(parent["edit_token"], r"^[0-9a-f]{64}$")
         self.assertEqual(page["items"][1]["title"], " \t\u00a0\u3000")
         self.assertEqual(self.db.list_library(text="Portrait")["total"], 1)
@@ -1520,6 +1521,7 @@ class TestLibrary(unittest.TestCase):
                     "tags",
                     "rating",
                     "notes",
+                    "archived",
                     "variants",
                 },
             )
diff --git a/tests/test_library_delete_routes.py b/tests/test_library_delete_routes.py
new file mode 100644
index 00000000..6bf68d88
--- /dev/null
+++ b/tests/test_library_delete_routes.py
@@ -0,0 +1,353 @@
+"""#443 (D152): the Library delete, archive and restore routes, and ingestion after."""
+
+import json
+import os
+from unittest.mock import patch
+
+from tests.test_api_admin import AdminAPITestCase  # first: it stubs ComfyUI
+from database.execution_history_schema import rotate_history_epoch  # noqa: E402
+from database.prompt_archive import TABLE as ARCHIVE  # noqa: E402
+from database.safety_backup import SafetyBackupFailed  # noqa: E402
+from py.config import PromptManagerConfig  # noqa: E402
+from utils.hashing import generate_prompt_hash  # noqa: E402
+
+PREVIEW = "/prompt_manager/library/delete/preview"
+DELETE = "/prompt_manager/library/delete"
+RESTORE = "/prompt_manager/library/restore"
+
+
+def graph(positive, negative="blur"):
+    return {
+        "1": {"class_type": "CLIPTextEncode", "inputs": {"text": positive}},
+        "2": {"class_type": "CLIPTextEncode", "inputs": {"text": negative}},
+        "3": {
+            "class_type": "KSampler",
+            "inputs": {"positive": ["1", 0], "negative": ["2", 0]},
+        },
+    }
+
+
+class LibraryDeleteRouteCase(AdminAPITestCase):
+    def epoch(self):
+        return self.api.db.get_library_options()["library_epoch"]
+
+    def save(self, text, **metadata):
+        return self.api.db.save_prompt(
+            text, prompt_hash=generate_prompt_hash(text), **metadata
+        )
+
+    def paired(self, positive, negative="blur"):
+        pair = self.api.db.save_prompt_pair(positive, negative)
+        return self.api.db.get_prompt_pair(pair)["positive_prompt_id"]
+
+    def rows(self, sql, params=()):
+        with self.api.db.model.get_connection() as conn:
+            return [tuple(row) for row in conn.execute(sql, params).fetchall()]
+
+    def ids(self):
+        return sorted(row[0] for row in self.rows("SELECT id FROM prompts"))
+
+    def archived(self):
+        return sorted(row[0] for row in self.rows(f"SELECT prompt_id FROM {ARCHIVE}"))
+
+    def backups(self):
+        folder = os.path.dirname(self.api.db.model.db_path)
+        return sorted(name for name in os.listdir(folder) if ".backup_" in name)
+
+    async def post(self, url, body):
+        response = await self.client.request("POST", url, json=body)
+        return response.status, await response.json()
+
+    async def review(self, ids):
+        status, body = await self.post(
+            PREVIEW, {"prompt_ids": ids, "expected_epoch": self.epoch()}
+        )
+        self.assertEqual(status, 200, body)
+        return body
+
+    async def confirm(self, review, backup=None):
+        return await self.post(
+            DELETE,
+            {
+                "archive_ids": review["archive"],
+                "delete_ids": review["delete"],
+                "expected_epoch": review["library_epoch"],
+                "backup": backup or review["backup"],
+            },
+        )
+
+    def policy(self, on):
+        previous = PromptManagerConfig.SAFETY_BACKUP
+        PromptManagerConfig.SAFETY_BACKUP = on
+        self.addCleanup(setattr, PromptManagerConfig, "SAFETY_BACKUP", previous)
+
+
+class TestLibraryDeleteRoutes(LibraryDeleteRouteCase):
+    async def test_preview_then_delete_archives_deletes_and_backs_up(self):
+        self.policy(True)
+        plain = self.save("Plain")
+        guarded = self.save("Guarded", tags=["__protected__"])
+        positive = self.paired("Cat")
+        review = await self.review([plain, guarded, positive, 99999])
+        self.assertEqual(
+            {
+                key: review[key]
+                for key in ("delete", "archive", "protected", "not_found")
+            },
+            {
+                "delete": [plain],
+                "archive": [positive],
+                "protected": [guarded],
+                "not_found": 1,
+            },
+        )
+        self.assertEqual(review["backup"], "on")
+        self.assertTrue(review["disk"]["sufficient"])
+        status, body = await self.confirm(review)
+        self.assertEqual(status, 200, body)
+        self.assertEqual(
+            (body["deleted"], body["archived"], body["changed"]), (1, 1, 0)
+        )
+        self.assertEqual(self.backups(), [body["backup"]])
+        self.assertNotIn(os.sep, body["backup"])
+        self.assertNotIn(plain, self.ids())
+        self.assertEqual(self.archived(), [positive])
+        # The backup still holds the deleted prompt.
+        import sqlite3
+
+        path = os.path.join(os.path.dirname(self.api.db.model.db_path), body["backup"])
+        with sqlite3.connect(path) as copy:
+            self.assertEqual(
+                copy.execute(
+                    "SELECT COUNT(*) FROM prompts WHERE id=?", (plain,)
+                ).fetchone()[0],
+                1,
+            )
+        copy.close()
+        # The hold ended: nothing is listed as running.
+        self.assertEqual(self.api._jobs.running(), [])
+
+    async def test_archive_only_takes_no_backup(self):
+        self.policy(True)
+        positive = self.paired("Cat")
+        review = await self.review([positive])
+        self.assertIsNone(review["disk"])
+        status, body = await self.confirm(review)
+        self.assertEqual((status, body["archived"], body["backup"]), (200, 1, None))
+        self.assertEqual(self.backups(), [])
+
+    async def test_policy_off_takes_none_unless_the_review_promised_one(self):
+        plain = self.save("Plain")
+        other = self.save("Other")
+        self.policy(False)
+        review = await self.review([plain])
+        self.assertEqual((review["backup"], review["disk"]), ("off", None))
+        status, body = await self.confirm(review)
+        self.assertEqual((status, body["deleted"], body["backup"]), (200, 1, None))
+        # Reviewed with the policy on, turned off before the confirm: kept.
+        review = await self.review([other])
+        status, body = await self.confirm(review, backup="on")
+        self.assertEqual(status, 200)
+        self.assertIsNotNone(body["backup"])
+
+    async def test_a_failed_backup_changes_nothing(self):
+        self.policy(True)
+        plain = self.save("Plain")
+        positive = self.paired("Cat")
+        review = await self.review([plain, positive])
+        with patch(
+            "py.api.maintenance.take_safety_backup",
+            side_effect=SafetyBackupFailed("x"),
+        ):
+            status, body = await self.confirm(review)
+        self.assertEqual((status, body["code"]), (500, "backup-failed"))
+        self.assertIn("nothing was changed", body["error"])
+        self.assertIn(plain, self.ids())
+        self.assertEqual(self.archived(), [])
+
+    async def test_a_short_disk_refuses_before_any_change(self):
+        self.policy(True)
+        plain = self.save("Plain")
+        from py.api import maintenance
+
+        with patch.object(maintenance, "_free_bytes", return_value=0):
+            review = await self.review([plain])
+            self.assertFalse(review["disk"]["sufficient"])
+            self.assertIn("Nothing was changed", review["disk"]["message"])
+            status, body = await self.confirm(review)
+        self.assertEqual((status, body["code"]), (507, "insufficient-space"))
+        self.assertIn(plain, self.ids())
+
+    async def test_busy_beside_a_record_changing_job(self):
+        plain = self.save("Plain")
+        review = await self.review([plain])
+        async with self.api._jobs.hold("scan", "Scan", admission="records"):
+            status, body = await self.confirm(review)
+        self.assertEqual((status, body["code"]), (409, "busy"))
+        self.assertEqual(body["running"]["title"], "Scan")
+        self.assertIn(plain, self.ids())
+
+    async def test_restored_storage_answers_409_on_every_route(self):
+        plain = self.save("Plain")
+        review = await self.review([plain])
+        rotate_history_epoch(self.api.db.model.get_connection())
+        status, body = await self.confirm(review)
+        self.assertEqual((status, body["code"]), (409, "storage-changed"))
+        for url in (PREVIEW, RESTORE):
+            status, body = await self.post(
+                url, {"prompt_ids": [plain], "expected_epoch": review["library_epoch"]}
+            )
+            self.assertEqual((status, body["code"]), (409, "storage-changed"))
+        self.assertIn(plain, self.ids())
+
+    async def test_restore_route(self):
+        positive = self.paired("Cat")
+        await self.confirm(await self.review([positive]))
+        status, body = await self.post(
+            RESTORE, {"prompt_ids": [positive, 99999], "expected_epoch": self.epoch()}
+        )
+        self.assertEqual(status, 200)
+        self.assertEqual((body["restored"], body["not_found"]), (1, 1))
+        self.assertEqual(self.archived(), [])
+
+    async def test_bodies_are_validated(self):
+        plain = self.save("Plain")
+        epoch = self.epoch()
+        selection = {"prompt_ids": [plain], "expected_epoch": epoch}
+        for url, body in (
+            (PREVIEW, {**selection, "extra": 1}),
+            (PREVIEW, {"prompt_ids": [], "expected_epoch": epoch}),
+            (PREVIEW, {"prompt_ids": [True], "expected_epoch": epoch}),
+            (PREVIEW, {"prompt_ids": list(range(1, 1002)), "expected_epoch": epoch}),
+            (PREVIEW, {"prompt_ids": [plain], "expected_epoch": "nope"}),
+            (RESTORE, {"prompt_ids": [plain]}),
+            (DELETE, {**selection}),
+            (
+                DELETE,
+                {
+                    "archive_ids": [],
+                    "delete_ids": [],
+                    "expected_epoch": epoch,
+                    "backup": "on",
+                },
+            ),
+            (
+                DELETE,
+                {
+                    "archive_ids": [plain],
+                    "delete_ids": [plain],
+                    "expected_epoch": epoch,
+                    "backup": "on",
+                },
+            ),
+            (
+                DELETE,
+                {
+                    "archive_ids": [],
+                    "delete_ids": [plain],
+                    "expected_epoch": epoch,
+                    "backup": "maybe",
+                },
+            ),
+            (
+                DELETE,
+                {
+                    "archive_ids": list(range(1, 600)),
+                    "delete_ids": list(range(600, 1100)),
+                    "expected_epoch": epoch,
+                    "backup": "off",
+                },
+            ),
+        ):
+            with self.subTest(url=url, body=body):
+                status, answer = await self.post(url, body)
+                self.assertEqual(status, 400, answer)
+                self.assertFalse(answer["success"])
+        for url in (PREVIEW, DELETE, RESTORE):
+            response = await self.client.request(
+                "POST", url, data="[1]", headers={"Content-Type": "application/json"}
+            )
+            self.assertEqual(response.status, 400)
+        self.assertIn(plain, self.ids())
+
+    async def test_the_legacy_bulk_delete_is_unchanged(self):
+        plain = self.save("Plain")
+        positive = self.paired("Cat")
+        response = await self.client.request(
+            "POST", "/prompt_manager/bulk/delete", json={"prompt_ids": [positive]}
+        )
+        self.assertEqual(response.status, 409)
+        response = await self.client.request(
+            "POST", "/prompt_manager/bulk/delete", json={"prompt_ids": [plain]}
+        )
+        self.assertEqual((await response.json())["deleted_count"], 1)
+        self.assertEqual(self.archived(), [])
+
+    async def test_shelf_parameter_and_cursor_scope(self):
+        kept = [self.paired(f"Kept {i}") for i in range(3)]
+        gone = [self.paired(f"Gone {i}") for i in range(3)]
+        await self.confirm(await self.review(gone))
+        response = await self.client.request(
+            "GET", "/prompt_manager/library?limit=2&shelf=active"
+        )
+        page = await response.json()
+        self.assertEqual(page["archived_total"], 3)
+        self.assertTrue(set(item["id"] for item in page["items"]) <= set(kept))
+        response = await self.client.request(
+            "GET",
+            "/prompt_manager/library?limit=2&shelf=archived"
+            f"&cursor={page['next_cursor']}",
+        )
+        self.assertEqual(response.status, 400)
+        response = await self.client.request(
+            "GET", "/prompt_manager/library?shelf=archived"
+        )
+        archived = await response.json()
+        self.assertEqual(sorted(item["id"] for item in archived["items"]), gone)
+        self.assertTrue(all(item["archived"] for item in archived["items"]))
+        response = await self.client.request("GET", "/prompt_manager/library?shelf=all")
+        self.assertEqual(response.status, 400)
+
+
+class TestIngestionAfterArchive(LibraryDeleteRouteCase):
+    def scan(self, name, positive, negative="blur"):
+        meta = {"prompt": json.dumps(graph(positive, negative))}
+        path = self.output_dir / name
+        path.write_bytes(b"png")
+        return self.api._ingest_scanned_file(path, meta)
+
+    async def test_a_scan_after_archive_creates_no_duplicate_and_keeps_it_archived(
+        self,
+    ):
+        self.assertEqual(self.scan("first.png", "Sunset"), "added")
+        positive = self.api.db.get_prompt_by_hash(generate_prompt_hash("Sunset"))["id"]
+        await self.confirm(await self.review([positive]))
+        before = self.ids()
+        self.scan("second.png", "Sunset")
+        self.scan("third.png", "  sunset ", "other negative")
+        self.assertEqual(
+            [i for i in self.ids() if i not in before],
+            [
+                self.api.db.get_prompt_by_hash(generate_prompt_hash("other negative"))[
+                    "id"
+                ]
+            ],
+        )
+        self.assertEqual(self.archived(), [positive])
+        linked = self.rows(
+            "SELECT COUNT(*) FROM generated_images WHERE prompt_id=?", (positive,)
+        )
+        self.assertEqual(linked, [(3,)])
+        response = await self.client.request("GET", "/prompt_manager/library")
+        self.assertNotIn(
+            positive, [item["id"] for item in (await response.json())["items"]]
+        )
+
+    async def test_a_scan_after_delete_creates_the_prompt_again(self):
+        plain = self.save("Lonely sunset")
+        await self.confirm(await self.review([plain]))
+        self.assertEqual(self.scan("again.png", "Lonely sunset"), "added")
+        again = self.api.db.get_prompt_by_hash(generate_prompt_hash("Lonely sunset"))
+        self.assertIsNotNone(again)
+        self.assertNotEqual(again["id"], plain)
+        self.assertEqual(self.archived(), [])
diff --git a/tests/test_prompt_archive_schema.py b/tests/test_prompt_archive_schema.py
new file mode 100644
index 00000000..c23180fd
--- /dev/null
+++ b/tests/test_prompt_archive_schema.py
@@ -0,0 +1,196 @@
+"""#443: the Library parent archive table, its migration and its validation."""
+
+import shutil
+import sqlite3
+import tempfile
+import unittest
+from pathlib import Path
+
+from database.models import PromptModel
+from database.operations import PromptDatabase
+from database.prompt_archive import (
+    TABLE,
+    migrate_prompt_archive,
+    prompt_archive_schema_error,
+)
+from utils.hashing import generate_prompt_hash
+
+
+def _tables(conn):
+    return {
+        row[0]
+        for row in conn.execute("SELECT name FROM sqlite_master WHERE type='table'")
+    }
+
+
+class TestPromptArchiveSchema(unittest.TestCase):
+    def setUp(self):
+        self.temp = tempfile.TemporaryDirectory()
+        self.path = str(Path(self.temp.name) / "archive.db")
+        self.db = PromptDatabase(self.path)
+
+    def tearDown(self):
+        self.db.close_all()
+        self.temp.cleanup()
+
+    def conn(self):
+        return self.db.model.get_connection()
+
+    def save(self, text):
+        return self.db.save_prompt(text, prompt_hash=generate_prompt_hash(text))
+
+    def test_startup_creates_the_table_and_it_validates(self):
+        self.assertIn(TABLE, _tables(self.conn()))
+        self.assertIsNone(prompt_archive_schema_error(self.conn(), allow_missing=False))
+
+    def test_migration_is_idempotent(self):
+        conn = self.conn()
+        migrate_prompt_archive(conn)
+        migrate_prompt_archive(conn)
+        self.assertIsNone(prompt_archive_schema_error(conn, allow_missing=False))
+
+    def test_a_missing_table_is_accepted_only_when_allowed(self):
+        conn = sqlite3.connect(":memory:")
+        self.addCleanup(conn.close)
+        self.assertIsNone(prompt_archive_schema_error(conn))
+        self.assertEqual(
+            prompt_archive_schema_error(conn, allow_missing=False),
+            "Missing prompt archive schema",
+        )
+
+    def test_deleting_a_prompt_drops_its_archive_row(self):
+        pid = self.save("Archived then deleted")
+        conn = self.conn()
+        conn.execute(
+            f"INSERT INTO {TABLE}(prompt_id, archived_at) VALUES (?, ?)",
+            (pid, "2026-10-28T00:00:00+00:00"),
+        )
+        conn.commit()
+        self.db.delete_prompt(pid)
+        self.assertEqual(conn.execute(f"SELECT COUNT(*) FROM {TABLE}").fetchone()[0], 0)
+
+    def _broken(self, *statements):
+        conn = sqlite3.connect(":memory:")
+        self.addCleanup(conn.close)
+        conn.execute("CREATE TABLE prompts (id INTEGER PRIMARY KEY)")
+        for statement in statements:
+            conn.execute(statement)
+        return conn
+
+    def test_unsupported_structures_are_refused(self):
+        good = (
+            f"CREATE TABLE {TABLE} (prompt_id INTEGER PRIMARY KEY, "
+            "archived_at TEXT NOT NULL, "
+            "FOREIGN KEY(prompt_id) REFERENCES prompts(id) ON DELETE CASCADE)"
+        )
+        cases = {
+            "other definition": (
+                f"CREATE TABLE {TABLE} (prompt_id INTEGER PRIMARY KEY, "
+                "archived_at TEXT)",
+            ),
+            "no cascade": (
+                f"CREATE TABLE {TABLE} (prompt_id INTEGER PRIMARY KEY, "
+                "archived_at TEXT NOT NULL, "
+                "FOREIGN KEY(prompt_id) REFERENCES prompts(id))",
+            ),
+            "extra index": (good, f"CREATE INDEX x ON {TABLE}(archived_at)"),
+            "trigger": (
+                good,
+                f"CREATE TRIGGER t AFTER INSERT ON {TABLE} BEGIN SELECT 1; END",
+            ),
+            "view name": (f"CREATE VIEW {TABLE} AS SELECT 1",),
+        }
+        for name, statements in cases.items():
+            with self.subTest(name):
+                self.assertIsNotNone(
+                    prompt_archive_schema_error(self._broken(*statements))
+                )
+
+    def test_invalid_values_and_dangling_rows_are_refused(self):
+        good = (
+            f"CREATE TABLE {TABLE} (prompt_id INTEGER PRIMARY KEY, "
+            "archived_at TEXT NOT NULL, "
+            "FOREIGN KEY(prompt_id) REFERENCES prompts(id) ON DELETE CASCADE)"
+        )
+        for name, row in {
+            "number": "(1, 5)",
+            "blob": "(1, x'00')",
+            "long": f"(1, '{'x' * 65}')",
+            "dangling": "(99, '2026-10-28T00:00:00+00:00')",
+        }.items():
+            with self.subTest(name):
+                conn = self._broken(good, "INSERT INTO prompts(id) VALUES (1)")
+                conn.execute(f"INSERT INTO {TABLE} VALUES {row}")
+                self.assertIsNotNone(prompt_archive_schema_error(conn))
+
+    def test_a_refused_structure_stops_the_migration_without_changes(self):
+        conn = self._broken(
+            f"CREATE TABLE {TABLE} (prompt_id INTEGER PRIMARY KEY, archived_at TEXT)"
+        )
+        with self.assertRaises(sqlite3.DatabaseError):
+            migrate_prompt_archive(conn)
+        sql = conn.execute(
+            "SELECT sql FROM sqlite_master WHERE name=?", (TABLE,)
+        ).fetchone()[0]
+        self.assertNotIn("NOT NULL", sql)
+
+
+class TestPromptArchiveBackups(unittest.TestCase):
+    """Restore validation accepts an older backup and refuses a damaged table."""
+
+    def setUp(self):
+        self.temp = tempfile.TemporaryDirectory()
+        self.root = Path(self.temp.name)
+        self.db = PromptDatabase(str(self.root / "live.db"))
+
+    def tearDown(self):
+        self.db.close_all()
+        self.temp.cleanup()
+
+    def copy(self, name):
+        target = self.root / name
+        self.db.model.backup_database(str(target))
+        return str(target)
+
+    def test_a_backup_without_the_table_verifies_and_migrates(self):
+        path = self.copy("old.db")
+        with sqlite3.connect(path) as conn:
+            conn.execute(f"DROP TABLE {TABLE}")
+        conn.close()
+        ok, reason = self.db.model.verify_database_file(path)
+        self.assertTrue(ok, reason)
+        model = PromptModel(path)
+        try:
+            self.assertIn(TABLE, _tables(model.get_connection()))
+        finally:
+            model.close_all()
+
+    def test_a_backup_with_a_damaged_table_is_refused(self):
+        path = self.copy("bad.db")
+        with sqlite3.connect(path) as conn:
+            conn.execute(f"DROP TABLE {TABLE}")
+            conn.execute(f"CREATE TABLE {TABLE} (prompt_id INTEGER, archived_at TEXT)")
+        conn.close()
+        ok, reason = self.db.model.verify_database_file(path)
+        self.assertFalse(ok)
+        self.assertIn("archive", reason.lower())
+
+    def test_an_archived_prompt_survives_a_backup_copy(self):
+        pid = self.db.save_prompt("Kept", prompt_hash=generate_prompt_hash("Kept"))
+        conn = self.db.model.get_connection()
+        conn.execute(
+            f"INSERT INTO {TABLE}(prompt_id, archived_at) VALUES (?, ?)",
+            (pid, "2026-10-28T00:00:00+00:00"),
+        )
+        conn.commit()
+        path = self.copy("copy.db")
+        shutil.copy(path, path + ".2")
+        with sqlite3.connect(path + ".2") as other:
+            self.assertEqual(
+                other.execute(f"SELECT prompt_id FROM {TABLE}").fetchall(), [(pid,)]
+            )
+        other.close()
+
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/tools/vendor/frontend-coverage-baseline.json b/tools/vendor/frontend-coverage-baseline.json
index 7c18907f..8b5daf2e 100644
--- a/tools/vendor/frontend-coverage-baseline.json
+++ b/tools/vendor/frontend-coverage-baseline.json
@@ -73,7 +73,7 @@
   },
   "metadata-autocomplete.js": {
     "lines": 98,
-    "branches": 82,
+    "branches": 83,
     "functions": 85,
     "statements": 98
   },
@@ -371,6 +371,12 @@
     "functions": 98,
     "statements": 98
   },
+  "workspace/library-delete.mjs": {
+    "lines": 98,
+    "branches": 95,
+    "functions": 92,
+    "statements": 98
+  },
   "workspace/library-editor-state.mjs": {
     "lines": 96,
     "branches": 92,
@@ -397,8 +403,8 @@
   },
   "workspace/library-selection.mjs": {
     "lines": 98,
-    "branches": 86,
-    "functions": 84,
+    "branches": 87,
+    "functions": 89,
     "statements": 98
   },
   "workspace/library-state.mjs": {
@@ -410,7 +416,7 @@
   "workspace/library.mjs": {
     "lines": 96,
     "branches": 85,
-    "functions": 96,
+    "functions": 97,
     "statements": 96
   },
   "workspace/local-inspection.mjs": {
@@ -553,7 +559,7 @@
   },
   "workspace/system-backups.mjs": {
     "lines": 95,
-    "branches": 88,
+    "branches": 89,
     "functions": 94,
     "statements": 95
   },
diff --git a/web/js/workspace/library-delete.mjs b/web/js/workspace/library-delete.mjs
new file mode 100644
index 00000000..51de4868
--- /dev/null
+++ b/web/js/workspace/library-delete.mjs
@@ -0,0 +1,207 @@
+import { countOf } from './plural.mjs';
+import { openCloseOnlyReview, openReviewDialog } from './workspace-dialogs.mjs';
+
+/**
+ * The Prompt library's Delete… review and outcomes (#443, D152, beyond the concept). The concept maps the legacy prompt
+ * delete to a "reference-safe archive" reviewed in its `maintenancePlan` dialog; the workspace offers Delete… on the
+ * D148 bar, whose review (the shared `openReviewDialog`) says what happens to each selected prompt: deleted (in no saved
+ * pair), archived (paired: hidden, restorable) or kept (tagged `__protected__`). The server executes the reviewed
+ * lists (`POST /prompt_manager/library/delete`), taking a verified safety backup before any delete when the policy is
+ * on. Restore (`/library/restore`) puts archived prompts back on the shelf.
+ */
+export const PREVIEW_URL = '/prompt_manager/library/delete/preview';
+export const DELETE_URL = '/prompt_manager/library/delete';
+export const RESTORE_URL = '/prompt_manager/library/restore';
+export const REVIEWING = 'Reviewing…';
+export const DELETE_LABEL = 'Delete…';
+export const RESTORE_LABEL = 'Restore';
+// Answers that may follow a committed write: no status, or a gateway's.
+const UNCONFIRMED_STATUSES = new Set([502, 503, 504]);
+const NOTHING = 'Nothing was deleted or archived.';
+export const COPY = Object.freeze({
+    reviewFailed: 'The selected prompts could not be reviewed. Try again.',
+    storage: `The library was restored or moved since this page loaded. ${NOTHING}`,
+    unconfirmed: 'The server did not confirm the change. The Library was reloaded: check the shelf and Show archived prompts.',
+    failed: 'The selected prompts could not be changed. Try again.',
+    nothing: `${NOTHING} The Library was reloaded.`,
+    none: 'None of the selected prompts can be deleted or archived.',
+    restoreStorage: 'The library was restored or moved since this page loaded. No prompt was returned to the Library.',
+    restoreUnconfirmed: 'Returning the prompts could not be confirmed. The Library was reloaded.',
+    restoreFailed: 'The prompts could not be returned to the Library. Try again.',
+    archivedText: 'This text is an archived prompt. Restore it to show it in the Prompt library again.',
+});
+
+const count = value => (Number.isSafeInteger(value) && value >= 0 ? value : 0);
+const ids = value => (Array.isArray(value) ? value.filter(id => Number.isSafeInteger(id) && id > 0) : []);
+const were = (value, singular, plural) => `${value.toLocaleString('en-US')} ${value === 1 ? singular : plural}`;
+
+/** The preview's classes as counts and id lists, whatever else the answer holds. */
+export function reviewOf(preview) {
+    return {
+        epoch: typeof preview?.library_epoch === 'string' ? preview.library_epoch : null,
+        delete: ids(preview?.delete), archive: ids(preview?.archive), protected: ids(preview?.protected),
+        alreadyArchived: count(preview?.already_archived), notFound: count(preview?.not_found),
+        imageLinks: count(preview?.image_links), backup: preview?.backup === 'off' ? 'off' : 'on',
+        disk: preview?.disk && typeof preview.disk === 'object' ? preview.disk : null,
+    };
+}
+
+export function reviewTitle(review) {
+    if (!review.archive.length) return 'Delete selected prompts';
+    if (!review.delete.length) return 'Archive selected prompts';
+    return 'Delete or archive selected prompts';
+}
+
+/** "Title A, Title B, Title C and 2 more": the protected prompts the page has loaded, in selection order. */
+export function protectedNames(review, titleOf) {
+    const names = review.protected.map(titleOf).filter(name => typeof name === 'string' && name);
+    const shown = names.slice(0, 3).join(', ');
+    const more = review.protected.length - Math.min(3, names.length);
+    return more > 0 ? `${shown}${shown ? ' and ' : ''}${more.toLocaleString('en-US')} more` : shown;
+}
+
+/** An archived prompt's page notice: why it is archived, and its negative variants only when it has any. */
+export function archivedNoticeText(variantCount) {
+    const hidden = Number.isSafeInteger(variantCount) && variantCount > 0
+        ? `It and its ${countOf(variantCount, 'negative variant')} are hidden`
+        : 'It is hidden';
+    return `This prompt is archived because it is in a saved pair. ${hidden} from the Prompt library; nothing was removed.`;
+}
+
+/** The review's `[term, value]` rows (design §7.2); rows that do not apply are left out. */
+export function reviewGrid(review, titleOf = () => null) {
+    const rows = [
+        ['Delete permanently', `${countOf(review.delete.length, 'prompt')} not in a saved pair`],
+        // The archive reason is the saved pair (a pair's positive or negative), with or without negative variants.
+        ['Archive', `${countOf(review.archive.length, 'prompt')} in a saved pair: hidden, restorable`],
+    ];
+    if (review.protected.length) {
+        const names = protectedNames(review, titleOf);
+        rows.push(['Protected (kept)', `${review.protected.length.toLocaleString('en-US')}${names ? `: ${names}` : ''}`]);
+    }
+    if (review.alreadyArchived) rows.push(['Already archived', review.alreadyArchived.toLocaleString('en-US')]);
+    if (review.notFound) rows.push(['No longer exist', review.notFound.toLocaleString('en-US')]);
+    if (review.delete.length) {
+        rows.push(['Image links removed', `${countOf(review.imageLinks, 'image')} will no longer show these prompts (files stay on disk)`]);
+        rows.push(['Backup', review.backup === 'on' ? 'Create and verify before deleting'
+            : 'Off: no safety backup (System › Backup & export › Recovery policy)']);
+    }
+    return rows;
+}
+
+/** The review's sentences, in order, each when it applies. */
+export function reviewSentences(review) {
+    const sentences = [];
+    if (review.archive.length) {
+        sentences.push('Prompts in a saved pair, as its positive or its negative, are archived instead of deleted, so the ' +
+            'pair and its runs stay intact. Archived prompts cannot be deleted. To bring them back, press Show archived prompts, ' +
+            'select them and press Restore.');
+    }
+    if (review.delete.length) {
+        const undo = review.backup === 'on'
+            ? ' Deleted prompts cannot be brought back one by one: the only way back is to restore the safety backup taken ' +
+              'first (System › Backup & export), which returns the whole library to that moment. It is kept among the last ' +
+              '10 safety backups.'
+            : ' Deleted prompts cannot be brought back.';
+        sentences.push("Deleting removes each prompt's text, title, category, tags, rating, notes, run count, last use and " +
+            `image links.${undo} Image files, favorites, collections and recorded runs stay. A later scan, a new image or a ` +
+            'node run with the same text adds it again as a new prompt.');
+    }
+    if (review.protected.length) sentences.push('Protected prompts are tagged __protected__; remove the tag to delete them.');
+    return sentences;
+}
+
+export function primaryLabel(review) {
+    const deletes = review.delete.length, archives = review.archive.length;
+    if (deletes && archives) return `Delete ${deletes.toLocaleString('en-US')} and archive ${countOf(archives, 'prompt')}`;
+    return deletes ? `Delete ${countOf(deletes, 'prompt')}` : `Archive ${countOf(archives, 'prompt')}`;
+}
+
+/** Why a review cannot start, or null: nothing to change, or no room for the promised backup. */
+export function blockedReason(review) {
+    if (!review.delete.length && !review.archive.length) return COPY.none;
+    if (review.delete.length && review.disk && review.disk.sufficient === false) {
+        return typeof review.disk.message === 'string' && review.disk.message
+            ? review.disk.message : 'There is not enough free space for the safety backup. Nothing was changed.';
+    }
+    return null;
+}
+
+/**
+ * Open the review for `review` (`reviewOf`). `titleOf(id)` names a loaded prompt. A review that cannot start is the
+ * close-only review (`onDismiss` runs at once, as nothing is pending); otherwise Start calls `onStart()` and any other
+ * close `onDismiss()`.
+ */
+export function openDeleteReview({ scope, trigger, review, titleOf, onStart, onDismiss }) {
+    const title = reviewTitle(review), grid = reviewGrid(review, titleOf);
+    const options = reviewSentences(review).map(text => Object.assign(document.createElement('p'), { className: 'small', textContent: text }));
+    const blocked = blockedReason(review);
+    if (blocked) {
+        onDismiss();
+        openCloseOnlyReview({ scope, trigger, title, grid, options, sentence: blocked });
+        return;
+    }
+    openReviewDialog({ scope, trigger, title, grid, options, cancelLabel: 'Cancel',
+        primary: { label: primaryLabel(review), danger: true }, onStart, onDismiss });
+}
+
+/** The write's body: the reviewed lists, the epoch and the reviewed backup promise. */
+export function deleteBody(review) {
+    return { archive_ids: review.archive, delete_ids: review.delete, expected_epoch: review.epoch, backup: review.backup };
+}
+
+function failureOutcome(failure, copy) {
+    if (failure?.code === 'storage-changed') return { toast: copy.storage, committed: false, reload: true };
+    if (failure?.code === 'busy') {
+        const name = failure.running?.title || 'Another job';
+        return { toast: `${name} is running. Nothing was changed; try again when it finishes.`, committed: false, reload: false };
+    }
+    const status = failure?.status;
+    if (!Number.isInteger(status) || UNCONFIRMED_STATUSES.has(status)) return { toast: copy.unconfirmed, committed: true, reload: true };
+    // The server's own refusals that name their reason (backup-failed, insufficient-space) say "Nothing was changed".
+    if (['backup-failed', 'insufficient-space'].includes(failure?.code) && typeof failure.message === 'string' && failure.message) {
+        const lead = failure.code === 'backup-failed' ? 'The safety backup failed. ' : '';
+        return { toast: `${lead}${failure.message}`, committed: false, reload: false };
+    }
+    return { toast: copy.failed, committed: false, reload: false };
+}
+
+/** What a settled delete means: the toast, whether it may have `committed` and whether the shelf must `reload`. */
+export function deleteOutcome(result, failure, review) {
+    if (failure !== null || !result?.success) {
+        return failureOutcome(failure, { storage: COPY.storage, unconfirmed: COPY.unconfirmed, failed: COPY.failed });
+    }
+    const deleted = count(result.deleted), archived = count(result.archived);
+    const parts = [];
+    if (deleted) parts.push(`Deleted ${countOf(deleted, 'prompt')}.`);
+    if (archived) parts.push(`Archived ${countOf(archived, 'prompt')}.`);
+    if (!parts.length) parts.push(NOTHING);
+    const already = count(result.already_archived), missing = count(result.not_found), changed = count(result.changed);
+    if (already) parts.push(`${were(already, 'was', 'were')} already archived.`);
+    if (missing) parts.push(`${missing.toLocaleString('en-US')} no longer ${missing === 1 ? 'exists' : 'exist'}.`);
+    if (changed) parts.push(`${changed.toLocaleString('en-US')} changed since the review and ${changed === 1 ? 'was' : 'were'} kept.`);
+    const kept = review?.protected?.length || 0;
+    if (kept) parts.push(`${countOf(kept, 'protected prompt')} ${kept === 1 ? 'was' : 'were'} kept.`);
+    if (typeof result.backup === 'string' && result.backup) parts.push(`Safety backup saved: ${result.backup} (System › Backup & export).`);
+    if (!deleted && !archived) parts.push('The Library was reloaded.');
+    return { toast: parts.join(' '), committed: deleted + archived > 0, reload: true };
+}
+
+/** What a settled restore means (the same shape as `deleteOutcome`). */
+export function restoreOutcome(result, failure) {
+    if (failure !== null || !result?.success) {
+        return failureOutcome(failure, { storage: COPY.restoreStorage, unconfirmed: COPY.restoreUnconfirmed, failed: COPY.restoreFailed });
+    }
+    const restored = count(result.restored), unchanged = count(result.unchanged), missing = count(result.not_found);
+    const parts = [restored ? `Restored ${countOf(restored, 'prompt')} to the Prompt library.` : 'No prompt was restored.'];
+    if (unchanged) parts.push(`${unchanged.toLocaleString('en-US')} ${unchanged === 1 ? 'was' : 'were'} not archived.`);
+    if (missing) parts.push(`${missing.toLocaleString('en-US')} no longer ${missing === 1 ? 'exists' : 'exist'}.`);
+    return { toast: parts.join(' '), committed: restored > 0, reload: true };
+}
+
+/** A failed preview: a restored storage reloads the shelf; anything else keeps the selection. */
+export function previewOutcome(failure) {
+    if (failure?.code === 'storage-changed') return { toast: COPY.storage, committed: false, reload: true };
+    if (failure?.code === 'busy') return failureOutcome(failure, {});
+    return { toast: COPY.reviewFailed, committed: false, reload: false };
+}
diff --git a/web/js/workspace/library-selection.mjs b/web/js/workspace/library-selection.mjs
index 27f2b883..9a7af623 100644
--- a/web/js/workspace/library-selection.mjs
+++ b/web/js/workspace/library-selection.mjs
@@ -6,6 +6,8 @@ import { NO_TAGS, parseBulkTags } from './images-tagging-bulk.mjs';
 import { openInputDialog } from './workspace-dialogs.mjs';
 import { countOf } from './plural.mjs';
 import { showWorkspaceToast } from './toast.mjs';
+import { COPY as DELETE_COPY, DELETE_LABEL, DELETE_URL, PREVIEW_URL, REVIEWING, RESTORE_LABEL, RESTORE_URL, deleteBody, deleteOutcome,
+    openDeleteReview, previewOutcome, restoreOutcome, reviewOf } from './library-delete.mjs';
 
 /**
  * The Prompt library's selection and its bulk actions (D148, D151, beyond the concept): "Add tags" (#442, D151) and "Set
@@ -19,6 +21,10 @@ import { showWorkspaceToast } from './toast.mjs';
  * Apply posts `{prompt_ids, category|tags, expected_epoch}` to `POST /prompt_manager/bulk/category` or `/bulk/tags`:
  * the epoch the shelf was read under, so a restored storage answers 409 `storage-changed` and nothing is written.
  * Add tags writes prompt tags only, never image tags or auto-tags.
+ *
+ * Delete… (#443, D152) previews the selection, opens its review (`library-delete.mjs`) and posts the reviewed lists:
+ * unpaired prompts are deleted, paired ones archived, protected ones kept. On the archived shelf (`getShelf()` is
+ * 'archived') the bar offers Restore instead of the other actions.
  */
 export const CATEGORY_URL = '/prompt_manager/bulk/category';
 export const PROMPT_CATEGORY_DIALOG = Object.freeze({ ...CATEGORY_DIALOG, title: 'Categorize selected prompts' });
@@ -123,29 +129,34 @@ export function categoryProblem(value) {
  * to `focusFallback` when it was on the bar the reload hides.
  */
 export function mountLibrarySelection({ scope, api, grid, getItems, getEpoch, getCategories, focusFallback, onCommitted,
-    onReload }) {
+    onReload, getShelf = () => 'active', nameOf = () => null }) {
     let checked = Object.freeze(new Set()), anchor = null, shiftBox = null, writing = false;
     const element = el('div');
     element.id = 'library-bulkbar';
     const bulk = el('div', undefined, 'bulkbar'), count = el('strong');
     const addTags = createButton('Add tags');
     const setCategory = createButton('Set category');
+    const deleteButton = createButton(DELETE_LABEL, 'danger');
+    const restoreButton = createButton(RESTORE_LABEL);
     const clearButton = createButton('Clear');
     const selectLoaded = createButton('');
-    const actions = [addTags, setCategory, selectLoaded];
-    bulk.append(count, addTags, setCategory, clearButton);
+    // Every bar action is aria-disabled while a review or a write runs (D148, D151, D152), Clear too.
+    const actions = [addTags, setCategory, deleteButton, restoreButton, selectLoaded, clearButton];
+    let shownShelf = null;
     scope.listen(selectLoaded, 'click', () => {
         if (writing) return;
         selectAll();
         // The pressed offer left the bar: focus moves to its first action, as after D135's offer.
-        addTags.focus({ preventScroll: true });
+        (shownShelf === 'archived' ? restoreButton : addTags).focus({ preventScroll: true });
     });
     scope.listen(addTags, 'click', () => openTags());
     scope.listen(setCategory, 'click', () => openCategory());
-    scope.listen(clearButton, 'click', () => { clear(); focusFallback.focus({ preventScroll: true }); });
+    scope.listen(deleteButton, 'click', () => openDelete());
+    scope.listen(restoreButton, 'click', () => restoreSelected());
+    scope.listen(clearButton, 'click', () => { if (writing) return; clear(); focusFallback.focus({ preventScroll: true }); });
     // Escape in the bar clears the selection; the bar hides, so focus moves to the page heading as after Clear.
     scope.listen(element, 'keydown', event => {
-        if (event.key !== 'Escape' || !checked.size) return;
+        if (event.key !== 'Escape' || !checked.size || writing) return;
         event.preventDefault();
         clear();
         focusFallback.focus({ preventScroll: true });
@@ -154,6 +165,11 @@ export function mountLibrarySelection({ scope, api, grid, getItems, getEpoch, ge
     const ids = () => getItems().map(item => item.id);
     function render() {
         if (!checked.size) { bulk.remove(); return; }
+        const shelf = getShelf() === 'archived' ? 'archived' : 'active';
+        if (shelf !== shownShelf) {
+            shownShelf = shelf;
+            bulk.replaceChildren(count, ...(shelf === 'archived' ? [restoreButton] : [addTags, setCategory, deleteButton]), clearButton);
+        }
         const label = selectionLabel(checked.size);
         if (count.textContent !== label) count.textContent = label;
         const keys = ids();
@@ -240,20 +256,62 @@ export function mountLibrarySelection({ scope, api, grid, getItems, getEpoch, ge
         openInputDialog({ scope, trigger: addTags, ...PROMPT_TAGS_DIALOG, suggestions, validate: tagsProblem,
             onApply: text => write(TAGS_URL, { ...chosen, tags: parseBulkTags(text) }, 'tags') });
     }
-    /** The write carries no page signal: once sent it completes even if the page is left. A failure keeps the selection. */
-    async function write(url, body, kind) {
+    /** Hold every bar action while a review or write runs; `label` is what Delete… reads meanwhile. */
+    function lock(label = null) {
         writing = true;
         for (const button of actions) button.setAttribute('aria-disabled', 'true');
+        if (label !== null) deleteButton.textContent = label;
+    }
+    function unlock() {
+        writing = false;
+        for (const button of actions) button.removeAttribute('aria-disabled');
+        deleteButton.textContent = DELETE_LABEL;
+    }
+    /** Delete… (#443): preview the selection, then review it; Start posts what the review showed. */
+    async function openDelete() {
+        const chosen = target(DELETE_COPY.reviewFailed);
+        if (!chosen) return;
+        lock(REVIEWING);
+        let preview = null, failure = null;
+        try {
+            preview = await api.post(PREVIEW_URL, chosen, { signal: scope.signal });
+        } catch (error) {
+            failure = error;
+        }
+        if (scope.signal.aborted) return;
+        if (failure !== null || !preview?.success) {
+            unlock();
+            const outcome = previewOutcome(failure);
+            showWorkspaceToast(outcome.toast);
+            if (outcome.reload) onReload();
+            return;
+        }
+        const review = { ...reviewOf(preview), epoch: chosen.expected_epoch };
+        // The review is open: the bar stays held behind it, under its own name again.
+        deleteButton.textContent = DELETE_LABEL;
+        openDeleteReview({ scope, trigger: deleteButton, review, titleOf: nameOf,
+            onDismiss: unlock,
+            onStart: () => write(DELETE_URL, deleteBody(review), 'delete', (result, error) => deleteOutcome(result, error, review),
+                review.delete.length ? 'Deleting…' : 'Archiving…') });
+    }
+    /** Restore (#443): the selected archived prompts go back on the shelf. */
+    function restoreSelected() {
+        const chosen = target(DELETE_COPY.restoreFailed);
+        if (!chosen) return;
+        write(RESTORE_URL, chosen, 'restore', restoreOutcome);
+    }
+    /** The write carries no page signal: once sent it completes even if the page is left. A failure keeps the selection. */
+    async function write(url, body, kind, outcomeOf = (result, failure) => writeOutcome(result, failure, kind), label = null) {
+        lock(label);
         let result = null, failure = null;
         try {
             result = await api.post(url, body);
         } catch (error) {
             failure = error;
         } finally {
-            writing = false;
-            for (const button of actions) button.removeAttribute('aria-disabled');
+            unlock();
         }
-        const outcome = writeOutcome(result, failure, kind);
+        const outcome = outcomeOf(result, failure);
         // A left page still invalidates what it cached, so a return never shows the old categories.
         if (outcome.committed) onCommitted(kind, result?.success ? result : { phase: 'unconfirmed' });
         if (scope.signal.aborted) return;
@@ -274,7 +332,9 @@ export function mountLibrarySelection({ scope, api, grid, getItems, getEpoch, ge
         selectAll,
         /** A loaded batch: the count and the offer follow it. */
         listingChanged: () => { if (checked.size) render(); },
-        /** Whether a Set category write is still in flight. */
+        /** Whether a review or a write is still in flight. */
         writing: () => writing,
+        /** The shelf changed (Show archived prompts): the bar's actions follow it. */
+        shelfChanged: () => { shownShelf = null; render(); },
     };
 }
diff --git a/web/js/workspace/library-state.mjs b/web/js/workspace/library-state.mjs
index 596f82f7..ebaa2760 100644
--- a/web/js/workspace/library-state.mjs
+++ b/web/js/workspace/library-state.mjs
@@ -19,7 +19,12 @@ function parameters(filters,limit) {
     if(typeof folder!=='string' || folder.length>1024) throw new TypeError('Invalid library folder');
     if(tagMode!=='all') query.set('tag_mode',tagMode);
     if(folder) query.set('folder',folder);
-    query.set('sort',sort);return query;
+    query.set('sort',sort);
+    // #443 D152: the archived shelf; the default shelf sends nothing, as before.
+    const shelf=filters.shelf || 'active';
+    if(!['active','archived'].includes(shelf)) throw new TypeError('Invalid library shelf');
+    if(shelf==='archived') query.set('shelf','archived');
+    return query;
 }
 /** The Library's tag match values (#444); the first is the default, sent as no parameter. */
 export const LIBRARY_TAG_MODES=Object.freeze(['all','any','untagged']);
@@ -31,7 +36,7 @@ function validatePage(page,cursor,query) {
     if(!page || !Array.isArray(page.items) || page.items.some(item=>!parent(item)) || !Number.isSafeInteger(page.total) || page.total<0 || !Number.isSafeInteger(page.variant_total) || page.variant_total<0 || typeof page.has_more!=='boolean' || !(page.next_cursor===null || (typeof page.next_cursor==='string' && page.next_cursor.length)) || page.has_more!==(page.next_cursor!==null) || (page.has_more && cursor===page.next_cursor)) throw new TypeError('Invalid library page');
 }
 export function createLibraryStream({api,onChange=()=>{},restore}) {
-    let state=Object.freeze({items:Object.freeze([]),total:0,variantTotal:null,cursor:null,hasMore:true,loading:false,error:null,epoch:null});
+    let state=Object.freeze({items:Object.freeze([]),total:0,variantTotal:null,archivedTotal:null,cursor:null,hasMore:true,loading:false,error:null,epoch:null});
     let query=parameters({},40),request,disposed=false,seen=new Set();
     if(restore) {
         query=parameters(restore.filters,40);const saved=restore.state;
@@ -57,11 +62,13 @@ export function createLibraryStream({api,onChange=()=>{},restore}) {
             const incoming=[];const added=new Set();
             for(const item of page.items) if(!seen.has(item.id) && !added.has(item.id)) {added.add(item.id);incoming.push(Object.freeze({...item}));}
             for(const value of added) seen.add(value);
-            request=null;emit({items:incoming.length?Object.freeze([...state.items,...incoming]):state.items,epoch:state.epoch ?? epoch,total:page.total,variantTotal:page.variant_total,cursor:page.next_cursor,hasMore:page.has_more,loading:false,error:null});return incoming.length;
+            // #443: the archived parents matching the filters (Show archived prompts); null from an older server.
+            const archivedTotal=Number.isSafeInteger(page.archived_total) && page.archived_total>=0?page.archived_total:null;
+            request=null;emit({items:incoming.length?Object.freeze([...state.items,...incoming]):state.items,epoch:state.epoch ?? epoch,total:page.total,variantTotal:page.variant_total,archivedTotal,cursor:page.next_cursor,hasMore:page.has_more,loading:false,error:null});return incoming.length;
         } catch(error) {if(!disposed && current===request) {request=null;emit({loading:false,error});}return 0;}
     }
     return {get state(){return state;},loadMore,async reset(filters={}) {
-        if(disposed) return 0;const next=parameters(filters,40);request?.abort();request=null;query=next;seen=new Set();emit({items:Object.freeze([]),total:0,variantTotal:null,cursor:null,hasMore:true,loading:false,error:null,epoch:null});return loadMore();
+        if(disposed) return 0;const next=parameters(filters,40);request?.abort();request=null;query=next;seen=new Set();emit({items:Object.freeze([]),total:0,variantTotal:null,archivedTotal:state.archivedTotal ?? null,cursor:null,hasMore:true,loading:false,error:null,epoch:null});return loadMore();
     },dispose(){disposed=true;request?.abort();request=null;}};
 }
 /**
diff --git a/web/js/workspace/library.mjs b/web/js/workspace/library.mjs
index 82c12dc2..712f8fd7 100644
--- a/web/js/workspace/library.mjs
+++ b/web/js/workspace/library.mjs
@@ -17,6 +17,7 @@ import {libraryFilters,libraryViewState} from './saved-views.mjs';
 import {openRefineDialog,openContentDialog} from './workspace-dialogs.mjs';
 import {mountLibrarySelection} from './library-selection.mjs';
 import {fallBackToOriginal,replaceOnError,showsThumbnail,thumbnailSource} from './thumbnail-support.mjs';
+import {COPY as DELETE_COPY,RESTORE_URL,archivedNoticeText,restoreOutcome} from './library-delete.mjs';
 
 let shelfVisit=null;
 // Every confirmed receipt advances this; a shelf mounted before it never restores its cached stream.
@@ -109,6 +110,8 @@ export function rememberLibraryResult(result) {
 function outcomeMessage(result,outcome) {
     const {kind,receipt}=result.commit;
     if(kind==='metadata') return 'Saved.';
+    // #443: a save that reused an archived prompt leaves it archived; say how to bring it back.
+    if((kind==='create' || kind==='add-negative') && result.detail?.positive?.archived===true) return DELETE_COPY.archivedText;
     if(kind==='archive-pair') return ARCHIVED_MESSAGE;
     if(kind!=='create' && kind!=='add-negative') return null;
     if(receipt.positive_created) return 'Saved.';
@@ -160,7 +163,8 @@ export function mountLibrary(main,api,parentScope,{positiveId,savedState=null,on
         const visit=saved?null:shelfVisit, mountedGeneration=writeGeneration;
         // An invalidated visit keeps only filters and anchor: the stream restarts and heights are measured again.
         const restorable=visit?.state?visit:null;
-        const filters={text:'',category:'',tags:[],sort:'newest',tagMode:'all',folder:'',...visit?.filters,...saved};
+        // #443 D152: `shelf` ('active' or 'archived', Show archived prompts) lives in the visit's filters, never in a saved view.
+        const filters={text:'',category:'',tags:[],sort:'newest',tagMode:'all',folder:'',shelf:'active',...visit?.filters,...saved};
         // D153: a sort the shelf no longer offers (an older "Highest rated" visit) reads as Recently added.
         if(!LIBRARY_SORTS.some(([value])=>value===filters.sort)) filters.sort='newest';
         const section=el('section',undefined,'library-shelf');section.setAttribute('aria-label','Prompt library');
@@ -182,14 +186,22 @@ export function mountLibrary(main,api,parentScope,{positiveId,savedState=null,on
         // #437 D148: select prompts and set their category (the legacy admin's Set Category); a write reloads the shelf.
         let categoryNames=[];
         const selection=mountLibrarySelection({scope,api,grid,getItems:()=>state?.items ?? [],getEpoch:()=>state?.epoch ?? null,
-            getCategories:()=>categoryNames,focusFallback:{focus:()=>focusHeading(main)},
+            getCategories:()=>categoryNames,focusFallback:{focus:()=>focusHeading(main)},getShelf:()=>filters.shelf,
+            nameOf:id=>{const item=state?.items.find(entry=>entry.id===id);return item?displayTitle(item):null;},
             onCommitted:(kind,receipt)=>invalidateLibraryAfterWrite({kind:`bulk-${kind}`,receipt}),onReload:()=>{loadCategories();reset();}});
         const message=el('p','','library-status');message.setAttribute('role','status');
         const continuation=el('div',undefined,'library-continuation');
         const more=createButton('Load more prompts');const retry=createButton('Retry prompt library');retry.hidden=true;
         const actions=headingActions(main,section);
         const exportButton=createButton('Export');exportButton.setAttribute('aria-label','Export full Library JSON');
-        const newPrompt=createButton('+ New prompt','ca-primary');actions.append(exportButton,newPrompt);
+        // #443 D152: the shelf's counterpart of Negative variants' Show archived (#235); N follows the filters.
+        const showArchived=createButton('Show archived prompts');showArchived.setAttribute('aria-pressed',String(filters.shelf==='archived'));
+        const newPrompt=createButton('+ New prompt','ca-primary');actions.append(showArchived,exportButton,newPrompt);
+        scope.listen(showArchived,'click',()=>{
+            if(selection.writing()) return;
+            filters.shelf=filters.shelf==='archived'?'active':'archived';showArchived.setAttribute('aria-pressed',String(filters.shelf==='archived'));
+            reset();selection.shelfChanged();
+        });
         const exportStatus=el('p','','library-options-status');exportStatus.hidden=true;exportStatus.setAttribute('role','alert');
         const editor=createNewPromptEditor(api,scope,main);
         scope.listen(newPrompt,'click',()=>editor.open({mode:'new',trigger:newPrompt}));
@@ -244,6 +256,7 @@ export function mountLibrary(main,api,parentScope,{positiveId,savedState=null,on
             const content=el('div',undefined,'card-content');
             const heading=el('div',undefined,'card-title');const open=createButton(name);open.dataset.history='';
             heading.append(open,el('span',item.category || 'Uncategorized','chip'));
+            if(item.archived===true) heading.append(el('span','Archived','chip'));
             const prompts=el('div');
             const blocks=mountPromptBlocks(prompts,{prompts:{positive:{status:'resolved',text:item.text,source:'library'}},sender,parentScope:scope,roles:['positive'],title:name});
             const meta=el('div',undefined,'card-meta');
@@ -391,11 +404,16 @@ export function mountLibrary(main,api,parentScope,{positiveId,savedState=null,on
             // A loaded batch: the selection bar's count and Select all N loaded follow it (D151).
             if(batch) selection.listingChanged();
             if(next.variantTotal!==null) {
-                const count=`${countOf(next.total,'positive prompt')} · ${countOf(next.variantTotal,'negative variant')}`;
+                const count=filters.shelf==='archived'?`${countOf(next.total,'archived prompt')} · ${countOf(next.variantTotal,'negative variant')} hidden with them`
+                    :`${countOf(next.total,'positive prompt')} · ${countOf(next.variantTotal,'negative variant')}`;
                 if(captionCount.textContent!==count) captionCount.textContent=count;caption.hidden=false;
             }
+            const archivedLabel=next.archivedTotal===null?'Show archived prompts':`Show archived prompts (${next.archivedTotal.toLocaleString('en-US')})`;
+            if(showArchived.textContent!==archivedLabel) showArchived.textContent=archivedLabel;
+            const filtered=Boolean(filters.text || filters.category || filters.tags.length || filters.folder || filters.tagMode!=='all');
+            const empty=filters.shelf==='archived'?(filtered?'No archived prompts match.':'No archived prompts.'):'No matching prompts. Try changing the filters.';
             const hidden=hiddenSave!==null && !next.loading && !next.error && !next.hasMore && !next.items.some(item=>item.id===hiddenSave)?' The saved prompt is hidden by the current filters.':'';
-            message.textContent=(next.error?'Prompt library could not be loaded. Retry.':next.loading?'Loading prompt library…':!next.items.length?'No matching prompts. Try changing the filters.':!next.hasMore?'You’re all caught up.':'')+hidden;
+            message.textContent=(next.error?'Prompt library could not be loaded. Retry.':next.loading?'Loading prompt library…':!next.items.length?empty:!next.hasMore?'You’re all caught up.':'')+hidden;
             message.setAttribute('role',next.error?'alert':'status');retry.hidden=!next.error;more.hidden=!next.hasMore || !!next.error;more.setAttribute('aria-disabled',String(next.loading));
             // #464: a loaded page is laid out now, not on the next frame: a starved renderer (a background tab, headless
             // WebKit under load) can hold frames for seconds, which left a loaded shelf empty. Measurements still flush per frame.
@@ -490,6 +508,26 @@ export function mountLibrary(main,api,parentScope,{positiveId,savedState=null,on
             if(current) current.apply(result);else loader.load(positiveId);
             focusHeading(main);
         }
+        /** The Archived notice: Restore takes the prompt off the archive, then the page reads it again. */
+        function archivedNotice(content,shown) {
+            const notice=el('div',undefined,'notice library-archived-notice'),copy=el('div'),row=el('div',undefined,'row-actions');
+            const status=el('p','','small');status.setAttribute('role','status');status.hidden=true;
+            const restore=createButton('Restore');restore.setAttribute('aria-label','Restore this prompt to the Prompt library');
+            copy.append(el('h2','Archived'),el('p',archivedNoticeText(shown.positive.variant_count)),status);row.append(restore);notice.append(copy,row);
+            content.listen(restore,'click',async()=>{
+                if(restore.getAttribute('aria-disabled')==='true') return;
+                restore.setAttribute('aria-disabled','true');status.hidden=true;
+                let result=null,failure=null;
+                try {result=await api.post(RESTORE_URL,{prompt_ids:[shown.positive.id],expected_epoch:shown.library_epoch});} catch(error) {failure=error;}
+                const outcome=restoreOutcome(result,failure);
+                if(outcome.committed) invalidateLibraryAfterWrite({kind:'bulk-restore',receipt:result?.success?result:{phase:'unconfirmed'}});
+                if(content.signal.aborted) return;
+                restore.removeAttribute('aria-disabled');
+                if(outcome.reload) {showWorkspaceToast(outcome.toast);detail=null;loader.load(positiveId);focusHeading(main);return;}
+                status.textContent=outcome.toast;status.hidden=false;
+            });
+            return notice;
+        }
         /** Explicit exit after restored storage: dispose the recorded view, then remount with a fresh visit. */
         function reloadView() {
             writeGeneration++;shelfVisit=shelfVisit && {filters:shelfVisit.filters,anchor:null};
@@ -667,6 +705,8 @@ export function mountLibrary(main,api,parentScope,{positiveId,savedState=null,on
             const gallery=el('section',undefined,'history-gallery');gallery.setAttribute('aria-label','Shared gallery');gallery.append(galleryHeading);
             const images=el('div',undefined,'library-linked-images');gallery.append(images);
             const recorded=el('div',undefined,'library-recorded-container');
+            // #443 D152: an archived prompt's page says so first, with Restore (the concept's `.notice`).
+            if(detail.positive.archived===true) body.append(archivedNotice(content,detail));
             body.append(summary,variants,gallery,recorded);
             const recordFor=pairId=>detail.variants.find(variant=>variant.id===pairId) || archivedList().find(variant=>variant.id===pairId) || (separate()?.id===pairId?separate():null);
             const archivedSelection=pairId=>archivedList().some(variant=>variant.id===pairId) || (separate()?.id===pairId && separate().archived===true);
diff --git a/web/js/workspace/system-backups.mjs b/web/js/workspace/system-backups.mjs
index a2893624..015f318d 100644
--- a/web/js/workspace/system-backups.mjs
+++ b/web/js/workspace/system-backups.mjs
@@ -56,8 +56,8 @@ export const HOST_UNAVAILABLE = 'Server settings could not be read.';
 export const SCHEDULE_REASON = 'Daily and Weekly are not available yet: back up with Back up whenever you choose.';
 export const WARNING_NOTE = 'Restores are staged, migrated and validated before replacing live data.';
 // D104 (M2): what the safety-backup policy does (the concept's "Preview a verified backup…" line misstates it).
-export const SAFETY_DESCRIPTION = 'Keep a verified copy of the database on disk before maintenance, cleanups and LoRA ' +
-    'imports change records. A restore always keeps one.';
+export const SAFETY_DESCRIPTION = 'Keep a verified copy of the database on disk before maintenance, cleanups, LoRA ' +
+    'imports and prompt deletes change records. A restore always keeps one.';
 // I1: a third review while two are held (another window's): what the user can do about it.
 export const REVIEWS_FULL = 'Two restores are already being reviewed in another window. Discard one there, or try again ' +
     'when it expires (15 minutes after it was reviewed).';