diff --git a/custom_components/houseplan/const.py b/custom_components/houseplan/const.py
index ad402474..9d9f054b 100755
--- a/custom_components/houseplan/const.py
+++ b/custom_components/houseplan/const.py
@@ -23,18 +23,15 @@ MAX_SIGN_PATHS = 200
 # its configuration yet (review R3-1).
 PLAN_ORPHAN_TTL_S = 3600
 
-# The scheduled sweep is a different judgement from a commit's. A commit knows
-# it replaced a file; the timer only knows nobody points at one right now — and
-# "nobody points at it" is a normal, reversible state. Detaching a plan (switch
-# a space to "draw") leaves the image on disk on purpose, and re-attaching it
-# later is a thing people do. On 2026-07-28 the hourly rule applied to that case
-# and removed two plans the owner had detached weeks earlier; they were not
-# recoverable. So the timer waits a month, and never touches a plan or an
-# attachment that still belongs to something in the configuration.
+# Kept for compatibility with anything reading it; the collectors no longer use
+# a long grace at all. Every attempt to age files out ended badly — first by
+# deleting detached plans, then by racing the save that was about to reference a
+# retried upload. What is left is deliberately simple: files go when the user's
+# action says so, plus staging folders after PLAN_ORPHAN_TTL_S.
 SCHEDULED_GRACE_S = 30 * 24 * 3600
 FILES_DIR = "houseplan/files"
 CONF_ADMIN_ONLY = "admin_only"
-VERSION = "1.46.5"
+VERSION = "1.46.6"
 
 DEFAULT_CONFIG: dict = {
     "spaces": [],
diff --git a/custom_components/houseplan/frontend/houseplan-card.js b/custom_components/houseplan/frontend/houseplan-card.js
index 477ebbea..c84e4171 100755
--- a/custom_components/houseplan/frontend/houseplan-card.js
+++ b/custom_components/houseplan/frontend/houseplan-card.js
@@ -2561,4 +2561,4 @@ const t=globalThis,e=t.ShadowRoot&&(void 0===t.ShadyCSS||t.ShadyCSS.nativeShadow
               </button>`}
         </div>
       </div>
-    </div>`}}ps.properties={hass:{attribute:!1},_config:{state:!0},_space:{state:!0},_layout:{state:!0},_devices:{state:!0},_tip:{state:!0},_selId:{state:!0},_toast:{state:!0},_serverCfg:{state:!0},_mode:{state:!0},_tool:{state:!0},_path:{state:!0},_cursorPt:{state:!0},_mergeSel:{state:!0},_openingDialog:{state:!0},_openingInfo:{state:!0},_mergeDialog:{state:!0},_splitSel:{state:!0},_decorTool:{state:!0},_decorStyle:{state:!0},_decorDraft:{state:!0},_decorSel:{state:!0},_decorTextDialog:{state:!0},_kioskDialog:{state:!0},_kioskDots:{state:!0},_areaSel:{state:!0},_nameSel:{state:!0},_roomDialog:{state:!0},_roomEditId:{state:!0},_roomFill:{state:!0},_roomTempSrc:{state:!0},_roomHumSrc:{state:!0},_roomSrcOpen:{state:!0},_roomSrcFilter:{state:!0},_roomNameScale:{state:!0},_roomLabelScale:{state:!0},_spaceDialog:{state:!0},_infoCard:{state:!0},_rulesDialog:{state:!0},_settingsDialog:{state:!0},_importDialog:{state:!0},_markerDialog:{state:!0},_zoom:{state:!0},_view:{state:!0}},ps._touchSeen=!1,ps._noHoverMq="undefined"!=typeof window&&"function"==typeof window.matchMedia&&window.matchMedia("(hover: none)").matches,ps.styles=Ui,customElements.get("houseplan-card")||customElements.define("houseplan-card",ps),window.customCards=window.customCards||[],window.customCards.find(t=>"houseplan-card"===t.type)||window.customCards.push({type:"houseplan-card",name:"House Plan Card",description:"Interactive house plan: spaces, rooms and devices with live states and drag layout."}),console.info("%c HOUSEPLAN-CARD %c v1.46.5 ","background:#3ea6ff;color:#04121f;font-weight:700","");
+    </div>`}}ps.properties={hass:{attribute:!1},_config:{state:!0},_space:{state:!0},_layout:{state:!0},_devices:{state:!0},_tip:{state:!0},_selId:{state:!0},_toast:{state:!0},_serverCfg:{state:!0},_mode:{state:!0},_tool:{state:!0},_path:{state:!0},_cursorPt:{state:!0},_mergeSel:{state:!0},_openingDialog:{state:!0},_openingInfo:{state:!0},_mergeDialog:{state:!0},_splitSel:{state:!0},_decorTool:{state:!0},_decorStyle:{state:!0},_decorDraft:{state:!0},_decorSel:{state:!0},_decorTextDialog:{state:!0},_kioskDialog:{state:!0},_kioskDots:{state:!0},_areaSel:{state:!0},_nameSel:{state:!0},_roomDialog:{state:!0},_roomEditId:{state:!0},_roomFill:{state:!0},_roomTempSrc:{state:!0},_roomHumSrc:{state:!0},_roomSrcOpen:{state:!0},_roomSrcFilter:{state:!0},_roomNameScale:{state:!0},_roomLabelScale:{state:!0},_spaceDialog:{state:!0},_infoCard:{state:!0},_rulesDialog:{state:!0},_settingsDialog:{state:!0},_importDialog:{state:!0},_markerDialog:{state:!0},_zoom:{state:!0},_view:{state:!0}},ps._touchSeen=!1,ps._noHoverMq="undefined"!=typeof window&&"function"==typeof window.matchMedia&&window.matchMedia("(hover: none)").matches,ps.styles=Ui,customElements.get("houseplan-card")||customElements.define("houseplan-card",ps),window.customCards=window.customCards||[],window.customCards.find(t=>"houseplan-card"===t.type)||window.customCards.push({type:"houseplan-card",name:"House Plan Card",description:"Interactive house plan: spaces, rooms and devices with live states and drag layout."}),console.info("%c HOUSEPLAN-CARD %c v1.46.6 ","background:#3ea6ff;color:#04121f;font-weight:700","");
diff --git a/custom_components/houseplan/manifest.json b/custom_components/houseplan/manifest.json
index 53b05b2f..87fdb855 100755
--- a/custom_components/houseplan/manifest.json
+++ b/custom_components/houseplan/manifest.json
@@ -16,5 +16,5 @@
   "issue_tracker": "https://github.com/Matysh/houseplan-card/issues",
   "requirements": [],
   "single_config_entry": true,
-  "version": "1.46.5"
+  "version": "1.46.6"
 }
diff --git a/custom_components/houseplan/plans.py b/custom_components/houseplan/plans.py
index a269a04e..b67c6ca2 100644
--- a/custom_components/houseplan/plans.py
+++ b/custom_components/houseplan/plans.py
@@ -14,7 +14,7 @@ import time
 from pathlib import Path
 from typing import Any
 
-from .const import PLAN_ORPHAN_TTL_S, SCHEDULED_GRACE_S
+from .const import PLAN_ORPHAN_TTL_S
 from .validation import MAX_FILENAME, PLAN_EXTENSIONS, sanitize_filename
 
 _LOGGER = logging.getLogger(__name__)
@@ -121,20 +121,25 @@ def collect_attachments(
 ) -> int:
     """The same commit-scoped rule as `collect_plans`, for marker attachments.
 
-    A file the old revision referenced and the new one does not was superseded
-    by this commit and goes. Otherwise a staging folder (`up_*` — only ever a
-    dialog that was never saved) is collected after PLAN_ORPHAN_TTL_S, and
-    anything else waits out SCHEDULED_GRACE_S. Never raises: it runs behind a
-    durable write.
+    A file the old revision referenced and the new one does not, whose marker
+    still exists, was removed on purpose — the dialog has a trash button and
+    promises nothing. It goes. Everything else is kept, except a staging folder
+    (`up_*`), which by construction only ever holds an upload from a dialog that
+    was never saved: those go after PLAN_ORPHAN_TTL_S. Never raises: it runs
+    behind a durable write.
     """
     new_refs = attachment_refs(new_cfg)
     old_refs = attachment_refs(old_cfg)
+    # Removing an attachment from a device that still exists is the user saying
+    # "drop this one" — a trash button, no promise that anything is kept. A
+    # device that is GONE is a different transition, and its files follow the
+    # same rule as a deleted space's plan: kept.
+    live_markers = {str(m.get("id")) for m in (new_cfg or {}).get("markers") or []}
     # Same distinction as for plans. A staging folder (`up_*`) is different: it
     # only ever holds an upload from a dialog that was never saved, so the short
     # rule is exactly right there even on the timer.
     now_s = time.time() if now is None else now
     staging_cutoff = now_s - PLAN_ORPHAN_TTL_S
-    cutoff = now_s - SCHEDULED_GRACE_S
     removed = 0
     try:
         folders = sorted(p for p in files_dir.iterdir() if p.is_dir()) if files_dir.is_dir() else []
@@ -144,10 +149,8 @@ def collect_attachments(
     removed += sweep_upload_temps(files_dir, now)
     for folder in folders:
         # A staging folder only ever holds an upload from a dialog that was never
-        # saved — unambiguous, so an hour is right. A marker's own folder is not:
-        # removing an attachment is deliberate, but so is re-adding one, and the
-        # file may have been detached rather than abandoned. Give it a month.
-        limit = staging_cutoff if folder.name.startswith("up_") else cutoff
+        # saved — unambiguous, so an hour is right, and no device owns it.
+        staging = folder.name.startswith("up_")
         try:
             items = sorted(p for p in folder.iterdir() if p.is_file())
         except OSError:
@@ -156,9 +159,16 @@ def collect_attachments(
             rel = f"{folder.name}/{item.name}"
             if rel in new_refs:
                 continue
-            if rel not in old_refs:  # not superseded: absence alone is weak evidence
+            dropped = rel in old_refs and folder.name in live_markers
+            if not dropped:
+                if not staging:
+                    # Same rule as for plans: not asked for, so kept. A file in
+                    # a device's folder that the device does not list is an
+                    # upload whose save was rejected — and ageing those out
+                    # raced the retry that was about to reference them.
+                    continue
                 try:
-                    if item.stat().st_mtime >= limit:
+                    if item.stat().st_mtime >= staging_cutoff:
                         continue
                 except OSError:
                     continue
@@ -196,6 +206,14 @@ def plan_refs(cfg: dict[str, Any] | None) -> set[str]:
     return out
 
 
+def plan_by_space(cfg: dict[str, Any] | None) -> dict[str, str]:
+    """space id -> the plan file it references ('' when it has none)."""
+    return {
+        str(sp.get("id")): plan_basename(sp.get("plan_url"))
+        for sp in (cfg or {}).get("spaces") or []
+    }
+
+
 def is_plan_file(name: str) -> bool:
     """Does this look like a plan we wrote: <space>.<ext> or <space>.<token>.<ext>?"""
     parts = name.split(".")
@@ -242,10 +260,17 @@ def collect_plans(
     # nothing) destroyed two detached plans on 2026-07-28.
     # The short rule fits exactly one case: a space that HAS a plan, where any
     # other file of its own can only be a superseded or rejected upload.
-    spaces = {str(sp.get("id")): sp.get("plan_url") for sp in (new_cfg or {}).get("spaces") or []}
-    now_s = time.time() if now is None else now
-    reject_cutoff = now_s - PLAN_ORPHAN_TTL_S
-    cutoff = now_s - SCHEDULED_GRACE_S
+    old_by_space = plan_by_space(old_cfg)
+    new_by_space = plan_by_space(new_cfg)
+    # A file that left the configuration tells us nothing on its own: replacing a
+    # plan, detaching one and deleting a space all look identical from
+    # `old_refs - new_refs`. Only the first is a deletion the user asked for
+    # (HP-1465-01 — the guards below were written and then never reached,
+    # because the code decided "superseded" before asking why).
+    replaced = {
+        name for space, name in old_by_space.items()
+        if new_by_space.get(space) and new_by_space[space] != name
+    }
     removed = 0
     try:
         items = sorted(plans_dir.iterdir()) if plans_dir.is_dir() else []
@@ -258,24 +283,22 @@ def collect_plans(
     for item in items:
         if not item.is_file() or item.name in new_refs or not is_plan_file(item.name):
             continue
-        superseded = item.name in old_refs
-        if not superseded:
-            space = item.name.split(".")[0]
-            if space in spaces and not spaces[space]:
-                # PRODUCT RULE (owner's decision, 2026-07-28): a detached plan
-                # is never deleted, at any age. The space is there and currently
-                # has no plan — the image was detached, one click undoes that,
-                # and the editor says the file stays. The two errors are not
-                # symmetrical: a few megabytes we did not need can always be
-                # removed by hand, a file we should not have removed cannot be
-                # brought back. When in doubt, keep it.
-                continue
-            limit = reject_cutoff if space in spaces else cutoff
-            try:
-                if item.stat().st_mtime >= limit:
-                    continue
-            except OSError:
-                continue
+        if item.name not in replaced:
+            # PRODUCT RULE (owner's decision, 2026-07-28): a plan file we were
+            # not told to delete is kept, however long it sits there. Detaching
+            # is one click to undo and the editor says the image stays; deleting
+            # a space is deliberate but the image was imported and may be
+            # nowhere else. The errors are not symmetrical — unnecessary
+            # megabytes can be removed by hand, a deleted file cannot be
+            # brought back.
+            #
+            # There is deliberately no age rule here. An earlier version aged
+            # out "rejected uploads" — a file of a space that has a plan, which
+            # was never the plan — and that raced a save: the sweep deleted the
+            # upload from the failed attempt while a retry was committing a
+            # reference to it. A rule that can delete a file somebody is about
+            # to point at is not worth the disk it reclaims.
+            continue
         try:
             item.unlink()
             removed += 1
diff --git a/demo/srv/assets/houseplan-card.js b/demo/srv/assets/houseplan-card.js
index 477ebbea..c84e4171 100755
--- a/demo/srv/assets/houseplan-card.js
+++ b/demo/srv/assets/houseplan-card.js
@@ -2561,4 +2561,4 @@ const t=globalThis,e=t.ShadowRoot&&(void 0===t.ShadyCSS||t.ShadyCSS.nativeShadow
               </button>`}
         </div>
       </div>
-    </div>`}}ps.properties={hass:{attribute:!1},_config:{state:!0},_space:{state:!0},_layout:{state:!0},_devices:{state:!0},_tip:{state:!0},_selId:{state:!0},_toast:{state:!0},_serverCfg:{state:!0},_mode:{state:!0},_tool:{state:!0},_path:{state:!0},_cursorPt:{state:!0},_mergeSel:{state:!0},_openingDialog:{state:!0},_openingInfo:{state:!0},_mergeDialog:{state:!0},_splitSel:{state:!0},_decorTool:{state:!0},_decorStyle:{state:!0},_decorDraft:{state:!0},_decorSel:{state:!0},_decorTextDialog:{state:!0},_kioskDialog:{state:!0},_kioskDots:{state:!0},_areaSel:{state:!0},_nameSel:{state:!0},_roomDialog:{state:!0},_roomEditId:{state:!0},_roomFill:{state:!0},_roomTempSrc:{state:!0},_roomHumSrc:{state:!0},_roomSrcOpen:{state:!0},_roomSrcFilter:{state:!0},_roomNameScale:{state:!0},_roomLabelScale:{state:!0},_spaceDialog:{state:!0},_infoCard:{state:!0},_rulesDialog:{state:!0},_settingsDialog:{state:!0},_importDialog:{state:!0},_markerDialog:{state:!0},_zoom:{state:!0},_view:{state:!0}},ps._touchSeen=!1,ps._noHoverMq="undefined"!=typeof window&&"function"==typeof window.matchMedia&&window.matchMedia("(hover: none)").matches,ps.styles=Ui,customElements.get("houseplan-card")||customElements.define("houseplan-card",ps),window.customCards=window.customCards||[],window.customCards.find(t=>"houseplan-card"===t.type)||window.customCards.push({type:"houseplan-card",name:"House Plan Card",description:"Interactive house plan: spaces, rooms and devices with live states and drag layout."}),console.info("%c HOUSEPLAN-CARD %c v1.46.5 ","background:#3ea6ff;color:#04121f;font-weight:700","");
+    </div>`}}ps.properties={hass:{attribute:!1},_config:{state:!0},_space:{state:!0},_layout:{state:!0},_devices:{state:!0},_tip:{state:!0},_selId:{state:!0},_toast:{state:!0},_serverCfg:{state:!0},_mode:{state:!0},_tool:{state:!0},_path:{state:!0},_cursorPt:{state:!0},_mergeSel:{state:!0},_openingDialog:{state:!0},_openingInfo:{state:!0},_mergeDialog:{state:!0},_splitSel:{state:!0},_decorTool:{state:!0},_decorStyle:{state:!0},_decorDraft:{state:!0},_decorSel:{state:!0},_decorTextDialog:{state:!0},_kioskDialog:{state:!0},_kioskDots:{state:!0},_areaSel:{state:!0},_nameSel:{state:!0},_roomDialog:{state:!0},_roomEditId:{state:!0},_roomFill:{state:!0},_roomTempSrc:{state:!0},_roomHumSrc:{state:!0},_roomSrcOpen:{state:!0},_roomSrcFilter:{state:!0},_roomNameScale:{state:!0},_roomLabelScale:{state:!0},_spaceDialog:{state:!0},_infoCard:{state:!0},_rulesDialog:{state:!0},_settingsDialog:{state:!0},_importDialog:{state:!0},_markerDialog:{state:!0},_zoom:{state:!0},_view:{state:!0}},ps._touchSeen=!1,ps._noHoverMq="undefined"!=typeof window&&"function"==typeof window.matchMedia&&window.matchMedia("(hover: none)").matches,ps.styles=Ui,customElements.get("houseplan-card")||customElements.define("houseplan-card",ps),window.customCards=window.customCards||[],window.customCards.find(t=>"houseplan-card"===t.type)||window.customCards.push({type:"houseplan-card",name:"House Plan Card",description:"Interactive house plan: spaces, rooms and devices with live states and drag layout."}),console.info("%c HOUSEPLAN-CARD %c v1.46.6 ","background:#3ea6ff;color:#04121f;font-weight:700","");
diff --git a/dist/houseplan-card.js b/dist/houseplan-card.js
index 477ebbea..c84e4171 100755
--- a/dist/houseplan-card.js
+++ b/dist/houseplan-card.js
@@ -2561,4 +2561,4 @@ const t=globalThis,e=t.ShadowRoot&&(void 0===t.ShadyCSS||t.ShadyCSS.nativeShadow
               </button>`}
         </div>
       </div>
-    </div>`}}ps.properties={hass:{attribute:!1},_config:{state:!0},_space:{state:!0},_layout:{state:!0},_devices:{state:!0},_tip:{state:!0},_selId:{state:!0},_toast:{state:!0},_serverCfg:{state:!0},_mode:{state:!0},_tool:{state:!0},_path:{state:!0},_cursorPt:{state:!0},_mergeSel:{state:!0},_openingDialog:{state:!0},_openingInfo:{state:!0},_mergeDialog:{state:!0},_splitSel:{state:!0},_decorTool:{state:!0},_decorStyle:{state:!0},_decorDraft:{state:!0},_decorSel:{state:!0},_decorTextDialog:{state:!0},_kioskDialog:{state:!0},_kioskDots:{state:!0},_areaSel:{state:!0},_nameSel:{state:!0},_roomDialog:{state:!0},_roomEditId:{state:!0},_roomFill:{state:!0},_roomTempSrc:{state:!0},_roomHumSrc:{state:!0},_roomSrcOpen:{state:!0},_roomSrcFilter:{state:!0},_roomNameScale:{state:!0},_roomLabelScale:{state:!0},_spaceDialog:{state:!0},_infoCard:{state:!0},_rulesDialog:{state:!0},_settingsDialog:{state:!0},_importDialog:{state:!0},_markerDialog:{state:!0},_zoom:{state:!0},_view:{state:!0}},ps._touchSeen=!1,ps._noHoverMq="undefined"!=typeof window&&"function"==typeof window.matchMedia&&window.matchMedia("(hover: none)").matches,ps.styles=Ui,customElements.get("houseplan-card")||customElements.define("houseplan-card",ps),window.customCards=window.customCards||[],window.customCards.find(t=>"houseplan-card"===t.type)||window.customCards.push({type:"houseplan-card",name:"House Plan Card",description:"Interactive house plan: spaces, rooms and devices with live states and drag layout."}),console.info("%c HOUSEPLAN-CARD %c v1.46.5 ","background:#3ea6ff;color:#04121f;font-weight:700","");
+    </div>`}}ps.properties={hass:{attribute:!1},_config:{state:!0},_space:{state:!0},_layout:{state:!0},_devices:{state:!0},_tip:{state:!0},_selId:{state:!0},_toast:{state:!0},_serverCfg:{state:!0},_mode:{state:!0},_tool:{state:!0},_path:{state:!0},_cursorPt:{state:!0},_mergeSel:{state:!0},_openingDialog:{state:!0},_openingInfo:{state:!0},_mergeDialog:{state:!0},_splitSel:{state:!0},_decorTool:{state:!0},_decorStyle:{state:!0},_decorDraft:{state:!0},_decorSel:{state:!0},_decorTextDialog:{state:!0},_kioskDialog:{state:!0},_kioskDots:{state:!0},_areaSel:{state:!0},_nameSel:{state:!0},_roomDialog:{state:!0},_roomEditId:{state:!0},_roomFill:{state:!0},_roomTempSrc:{state:!0},_roomHumSrc:{state:!0},_roomSrcOpen:{state:!0},_roomSrcFilter:{state:!0},_roomNameScale:{state:!0},_roomLabelScale:{state:!0},_spaceDialog:{state:!0},_infoCard:{state:!0},_rulesDialog:{state:!0},_settingsDialog:{state:!0},_importDialog:{state:!0},_markerDialog:{state:!0},_zoom:{state:!0},_view:{state:!0}},ps._touchSeen=!1,ps._noHoverMq="undefined"!=typeof window&&"function"==typeof window.matchMedia&&window.matchMedia("(hover: none)").matches,ps.styles=Ui,customElements.get("houseplan-card")||customElements.define("houseplan-card",ps),window.customCards=window.customCards||[],window.customCards.find(t=>"houseplan-card"===t.type)||window.customCards.push({type:"houseplan-card",name:"House Plan Card",description:"Interactive house plan: spaces, rooms and devices with live states and drag layout."}),console.info("%c HOUSEPLAN-CARD %c v1.46.6 ","background:#3ea6ff;color:#04121f;font-weight:700","");
diff --git a/docs/ARCHITECTURE.md b/docs/ARCHITECTURE.md
index 9cf1294a..741dea87 100644
--- a/docs/ARCHITECTURE.md
+++ b/docs/ARCHITECTURE.md
@@ -214,14 +214,22 @@ we should not have removed cannot be brought back.** When the evidence is weak,
 keep the file. Owner's decision, 2026-07-28, after the one-hour rule applied to
 every unreferenced file destroyed two detached plans.
 
+The classification is by **owner**, not by "is it referenced". A file leaving
+the configuration looks identical whether the plan was replaced, detached, or
+its space deleted — and only the first is a deletion the user asked for. Reading
+`old_refs - new_refs` and calling it "superseded" deleted a plan the moment it
+was detached, under documentation promising the opposite (HP-1465-01).
+
 | Case | What it means | Rule |
 |---|---|---|
-| In the old revision, not in the new | a save replaced it | removed immediately |
-| Space exists, has **no** plan | detached, one click to undo | **never removed** |
-| Space exists, has a plan | its own rejected upload | `PLAN_ORPHAN_TTL_S` (1 h) |
-| Space no longer exists | deliberate deletion, but people misclick | `SCHEDULED_GRACE_S` (30 d) |
-| Attachment in `up_*` | a dialog that was never saved | `PLAN_ORPHAN_TTL_S` (1 h) |
-| Attachment in a marker folder | unreferenced, but may come back | `SCHEDULED_GRACE_S` (30 d) |
+| Space in both, plan A → plan B | the user picked another image | removed immediately |
+| Space in both, plan → none | detached; one click undoes it | **kept** |
+| Space gone | deliberate, but the image was imported and may be nowhere else | **kept** |
+| Space has a plan, plus another file of its own | an upload whose save was rejected | **kept** — ageing these out raced the retry that referenced them |
+| Marker in both, attachment dropped from its list | a trash button, promising nothing | removed immediately |
+| Marker gone | same call as a deleted space's plan | **kept** |
+| Attachment in `up_*` | a dialog that was never saved; no device owns it | `PLAN_ORPHAN_TTL_S` (1 h) |
+| Marker there, file it never listed | a rejected upload | **kept**, same reason |
 
 **Config writes are serialized** (HP-1454-03). `_writeConfig()` chains onto a
 single promise: one `config/set` in flight, each carrying the revision the
diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index 97f38c27..71e6abf6 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -1,5 +1,26 @@
 # Changelog
 
+## v1.46.6 — 2026-07-28 (the detach promise, actually kept this time)
+- **Switching a space to "draw" no longer deletes its image.** v1.46.4 and
+  v1.46.5 said it did not, and the scheduled cleanup indeed left detached plans
+  alone — but the save itself deleted the file the moment the reference was
+  cleared, before any of those guards were reached. The cause: a file that left
+  the configuration was called "superseded", and from that difference alone
+  replacing a plan, detaching one and deleting its space are indistinguishable.
+  Only the first is a deletion anybody asked for. The transition is now
+  classified by the space that owned the file, and the same distinction applies
+  to attachments: dropping one from a device that still exists removes it,
+  deleting the device keeps its manuals.
+- **A plan whose space was deleted is kept**, rather than the thirty days
+  v1.46.5 promised — thirty days measured from the file's age is meaningless
+  anyway, since it was usually uploaded months earlier.
+- **Nothing is deleted for being old any more**, except a per-dialog staging
+  folder. The rule that aged out "rejected uploads" turned out to race a retry:
+  the cleanup removed the file from a failed save while the next attempt was
+  committing a reference to it. A rule that can delete a file somebody is about
+  to point at is not worth the disk it reclaims. Files therefore go when an
+  action says so, and otherwise stay.
+
 ## v1.46.5 — 2026-07-28 (audit of every automatic deletion)
 - **A detached plan is never deleted, at any age.** v1.46.4 gave it a month;
   this makes it permanent and writes the reason down where the next change will
diff --git a/docs/CHANGELOG.ru.md b/docs/CHANGELOG.ru.md
index 898145a7..3ef92266 100755
--- a/docs/CHANGELOG.ru.md
+++ b/docs/CHANGELOG.ru.md
@@ -6,6 +6,27 @@
 > **Правило проекта:** оба файла пополняются в одном коммите с самим
 > изменением — как и остальная документация (см. docs/STATUS.md).
 
+## v1.46.6 — 2026-07-28 (обещание про отцепление, теперь выполненное)
+- **Переключение пространства в «нарисовать» больше не удаляет его картинку.**
+  v1.46.4 и v1.46.5 утверждали, что не удаляет, и плановая уборка действительно
+  отцеплённые планы не трогала — но само сохранение удаляло файл в тот момент,
+  когда снималась ссылка, ещё до всех этих проверок. Причина: файл, покинувший
+  конфигурацию, считался «заменённым», а по одной этой разнице замену плана,
+  отцепление и удаление пространства различить невозможно. Удалением, о котором
+  просили, является только первое. Теперь переход классифицируется по
+  пространству-владельцу, и та же разница применяется к вложениям: убрали файл у
+  существующего устройства — он удаляется, удалили устройство — его инструкции
+  остаются.
+- **План удалённого пространства сохраняется**, а не тридцать дней, как обещала
+  v1.46.5: тридцать дней по возрасту файла всё равно бессмысленны — обычно он
+  загружен месяцы назад.
+- **По возрасту больше не удаляется ничего**, кроме промежуточной папки диалога.
+  Правило, которое вычищало «отвергнутые загрузки», оказалось в гонке с
+  повторной попыткой: уборка удаляла файл неудавшегося сохранения ровно тогда,
+  когда следующая попытка коммитила ссылку на него. Правило, способное удалить
+  файл, на который кто-то вот-вот сошлётся, не стоит освобождаемого места.
+  Файлы уходят по действию, в остальных случаях остаются.
+
 ## v1.46.5 — 2026-07-28 (ревизия всех автоматических удалений)
 - **Отцеплённый план не удаляется никогда, ни в каком возрасте.** В v1.46.4 ему
   давался месяц; теперь это навсегда, и причина записана там, где её увидит
diff --git a/docs/STATUS.md b/docs/STATUS.md
index 8cc50314..5d1d0fdb 100644
--- a/docs/STATUS.md
+++ b/docs/STATUS.md
@@ -15,12 +15,12 @@
 
 | Item | State |
 |---|---|
-| Version | **v1.46.5** everywhere (manifest, const.py, package.json, CARD_VERSION); deployed to the home instance |
+| Version | **v1.46.6** everywhere (manifest, const.py, package.json, CARD_VERSION); deployed to the home instance |
 | Workflow | Since 2026-07-22: minor changes go to branch **`dev`** (build + smokes → deploy home → commit → push, NO release); releases are batched on the owner's command (merge dev→main, one tag, one release with a summary changelog, CI checked on dev beforehand) |
 | GitHub | https://github.com/Matysh/houseplan-card — **`main` carries every published release, the latest tag is the current version above**; `dev` is where work lands and is merged into `main` at release time (so `dev` is normally equal to or ahead of `main`, never behind). Push via SSH key `ha_jb` (remote git@github.com:…); API releases via the fine-grained PAT in `~/.git-credentials` (Contents R/W, issued 2026-07-23) |
 | CI | validate.yml (hacs + hassfest + frontend + backend) green; release.yml attaches the bundle on release publish |
 | HACS | Custom repository works. **Inclusion PR: hacs/default#9004** — open, valid, labeled; ~864 older open PRs but merge rate ≈180/mo; realistic ETA 1–3 months (checked 2026-07-24) |
-| Home instance | ha.jbstudio.pro (SSH port 323, key `ha_jb`), deployed **v1.46.5** via direct copy (HACS custom repo also installed) |
+| Home instance | ha.jbstudio.pro (SSH port 323, key `ha_jb`), deployed **v1.46.6** via direct copy (HACS custom repo also installed) |
 | Localization | UI en/ru (src/i18n/*.json), everything user-visible localized incl. kiosk popover |
 | Tests | Four layers: frontend unit (`npm test`, node:test over `test-build/`), pure backend (`pytest tests_backend`, runs anywhere), HA-harness backend (same folder, CI only — needs py3.13 + pytest-homeassistant-custom-component), and browser smokes (`demo/smoke_*.mjs`, headless chromium). **Counts are not written down here** — they went stale within two releases while the version line beside them was kept current, which reads as less coverage than exists (review R5-2). Run `npm run inventory` for the current numbers, or read them off the last CI run |
 | Community | **Telegram chat: https://t.me/ha_houseplan** (created 2026-07-27) — the primary user-facing support channel; GitHub issues stay for bugs/features. Link it from any new release notes and posts |
diff --git a/docs/TESTING.md b/docs/TESTING.md
index 3484da85..411d8c5d 100644
--- a/docs/TESTING.md
+++ b/docs/TESTING.md
@@ -239,11 +239,14 @@ Run the *core flows* (marked ★ below) in each environment at least once per mi
       on the plan after a reload. Same for each tap action and each fill mode
       [auto: backend test_every_display_mode_the_editor_offers_is_accepted and
       neighbours, test_a_marker_showing_its_value_can_be_saved]
-- [ ] Detaching a plan keeps the file (v1.46.4/v1.46.5): switch a space to
-      "draw", restart, wait — the image stays in `config/houseplan/plans/`
-      indefinitely and can be re-attached. Replacing a plan still removes the one
-      it replaced, immediately
-      [auto: unit: test_scheduled_collection_never_takes_a_detached_plan]
+- [ ] Detaching a plan keeps the file (v1.46.6): switch a space to "draw" and
+      SAVE — the image is still in `config/houseplan/plans/` right afterwards,
+      and after a restart, and can be re-attached. Deleting the space keeps it
+      too. Replacing a plan still removes the one it replaced, immediately.
+      Check straight after the save: the earlier bug deleted the file at that
+      moment, while every scheduled-pass test passed
+      [auto: unit: test_plan_collection_matrix, test_attachment_collection_matrix,
+      backend test_detaching_a_plan_keeps_the_file]
 - [ ] Rebinding a device does not eat its manuals (v1.46.5): attach two files to
       a device, rebind it to another HA device — both are readable afterwards.
       If a copy failed, the file it failed on is still there rather than deleted
diff --git a/package.json b/package.json
index 1ab7c4f9..b61d0b02 100755
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "houseplan-card",
-  "version": "1.46.5",
+  "version": "1.46.6",
   "description": "Interactive house plan Lovelace card for Home Assistant",
   "license": "MIT",
   "type": "module",
diff --git a/src/houseplan-card.ts b/src/houseplan-card.ts
index 294a1ca1..6de53401 100755
--- a/src/houseplan-card.ts
+++ b/src/houseplan-card.ts
@@ -35,7 +35,7 @@ import './space-card';
 import { cardStyles } from './styles';
 import { langOf, t, type I18nKey } from './i18n';
 
-const CARD_VERSION = '1.46.5';
+const CARD_VERSION = '1.46.6';
 const LS_KEY = 'houseplan_card_layout_v1';
 const LS_CFG = 'houseplan_card_cfg_v1'; // cache of the server config+layout for instant rendering
 const LS_ZOOM = 'houseplan_card_zoom_v1';
diff --git a/tests_backend/test_ha_websocket.py b/tests_backend/test_ha_websocket.py
index d364f181..e8bbd0b1 100644
--- a/tests_backend/test_ha_websocket.py
+++ b/tests_backend/test_ha_websocket.py
@@ -342,35 +342,41 @@ async def test_commit_does_not_collect_another_client_s_uncommitted_upload(
     assert not (plans / pa).exists()
 
 
-async def test_abandoned_uploads_are_collected_once_old(
+async def test_a_rejected_upload_is_kept_not_aged_out(
     hass: HomeAssistant, hass_ws_client: WebSocketGenerator
 ) -> None:
-    """A rejected upload must not accumulate forever — but only age may free it."""
+    """v1.46.6: age is never a reason to delete a plan file.
+
+    It used to be, for "a file of a space that has a plan and never was one" —
+    an upload whose save had failed. That raced the retry: the sweep removed the
+    file while the next save was committing a reference to it. Keeping it costs
+    a few megabytes nobody can lose.
+    """
     import os
     import time
-    from pathlib import Path
 
-    from custom_components.houseplan.const import PLANS_DIR, PLAN_ORPHAN_TTL_S
+    from custom_components.houseplan.const import PLANS_DIR, SCHEDULED_GRACE_S
+    from custom_components.houseplan.store import get_data
 
     await _setup(hass)
     client = await hass_ws_client(hass)
-    plans = Path(hass.config.path(PLANS_DIR))
-    plans.mkdir(parents=True, exist_ok=True)
-    for stale in plans.glob("r3.*"):
-        stale.unlink()
+    plans = hass.config.path(PLANS_DIR)
 
     url0, p0 = await _upload(client, "r3", b"zero")
     rev = (await _save(client, await _cfg([{"id": "r3", "plan_url": url0}]), 0))["result"]["rev"]
 
-    _url, orphan = await _upload(client, "r3", b"abandoned")
-    old = time.time() - PLAN_ORPHAN_TTL_S - 60
-    os.utime(plans / orphan, (old, old))
-    # r3 still HAS a plan, so this really is a rejected upload — collectable
+    _url, orphan = await _upload(client, "r3", b"never saved")
+    old = time.time() - SCHEDULED_GRACE_S * 12
+    os.utime(os.path.join(plans, orphan), (old, old))
 
-    ok = await _save(client, await _cfg([{"id": "r3", "plan_url": url0}]), rev)
-    assert ok["success"]
-    assert not (plans / orphan).exists(), "an aged, unreferenced upload is collected"
-    assert (plans / p0).is_file(), "the referenced plan is never touched"
+    # a commit, and the scheduled pass, and any amount of age: it stays
+    assert (await _save(client, await _cfg([{"id": "r3", "plan_url": url0}]), rev))["success"]
+    data = get_data(hass)
+    await data.sweep()
+    await hass.async_block_till_done()
+
+    assert await hass.async_add_executor_job(os.path.isfile, os.path.join(plans, orphan))
+    assert await hass.async_add_executor_job(os.path.isfile, os.path.join(plans, p0))
 
 
 async def test_collection_ignores_files_that_are_not_plans(
@@ -889,7 +895,9 @@ def _paths(hass):
         "kept_file": os.path.join(files, "m5", "kept.pdf"),
         "kept_plan": os.path.join(plans, "s5.tok.png"),
         "orphan_file": os.path.join(files, "up_cancelled", "manual.pdf"),
-        "orphan_plan": os.path.join(plans, "deleted_space.orphan.png"),
+        # a plan file is never collected by age any more; keep one around and
+        # assert exactly that
+        "kept_reject": os.path.join(plans, "s5.reject.png"),
     }
 
 
@@ -907,8 +915,12 @@ async def _assert_swept(hass, p) -> None:
 
     assert await hass.async_add_executor_job(os.path.isfile, p["kept_file"]), "referenced file kept"
     assert await hass.async_add_executor_job(os.path.isfile, p["kept_plan"]), "referenced plan kept"
-    assert not await hass.async_add_executor_job(os.path.isfile, p["orphan_file"])
-    assert not await hass.async_add_executor_job(os.path.isfile, p["orphan_plan"])
+    assert not await hass.async_add_executor_job(os.path.isfile, p["orphan_file"]), (
+        "a staging folder from a dialog nobody saved is the one thing age collects"
+    )
+    assert await hass.async_add_executor_job(os.path.isfile, p["kept_reject"]), (
+        "a plan file is never removed for being old"
+    )
 
 
 async def test_startup_sweep_collects_what_no_commit_will(
@@ -991,19 +1003,25 @@ async def test_sweep_and_a_config_write_do_not_race(
     cfg2 = await _referenced_config()
     cfg2["spaces"][0]["plan_url"] = "/api/houseplan/content/plans/_/s5.newcomer.png"
 
-    entry = hass.config_entries.async_entries(DOMAIN)[0]
-    await asyncio.gather(
-        hass.config_entries.async_reload(entry.entry_id),   # runs the sweep
-        _save(client, cfg2, rev),
-    )
+    # Drive the sweep directly rather than through a reload: an entry reload has
+    # an unload window in which any WS call legitimately answers `not_ready`, so
+    # a save racing THAT proves nothing about the lock and fails at random.
+    from custom_components.houseplan.store import get_data
+
+    data = get_data(hass)
+    assert data is not None and data.sweep is not None
+    _swept, saved = await asyncio.gather(data.sweep(), _save(client, cfg2, rev))
     await hass.async_block_till_done()
 
+    # assert the CONCRETE outcome: a save that came back `not_ready` would leave
+    # the old config pointing at the old file and satisfy a vaguer check
+    assert saved["success"], saved.get("error")
     await client.send_json_auto_id({"type": "houseplan/config/get"})
     stored = (await client.receive_json())["result"]["config"]
-    referenced = stored["spaces"][0]["plan_url"].rsplit("/", 1)[-1]
+    assert stored["spaces"][0]["plan_url"].endswith("s5.newcomer.png")
     assert await hass.async_add_executor_job(
-        os.path.isfile, os.path.join(plans, referenced)
-    ), f"the accepted config points at {referenced}, which must exist"
+        os.path.isfile, os.path.join(plans, "s5.newcomer.png")
+    ), "the file the accepted config points at must exist"
 
 
 async def test_files_cleanup_keeps_referenced_files(
@@ -1048,3 +1066,49 @@ async def test_files_cleanup_keeps_referenced_files(
         "a file the configuration still references survives a cleanup of its folder"
     )
     assert not await hass.async_add_executor_job(os.path.isfile, os.path.join(folder, "orphan.pdf"))
+
+
+async def test_detaching_a_plan_keeps_the_file(
+    hass: HomeAssistant, hass_ws_client: WebSocketGenerator
+) -> None:
+    """HP-1465-01, through the real save — where the earlier tests never looked.
+
+    Every check for this lived in the pure collector with old and new config
+    equal, i.e. the scheduled pass. The transition that matters is a save, and
+    there the file was deleted the moment the reference was cleared.
+    """
+    import os
+
+    from custom_components.houseplan.const import PLANS_DIR
+
+    await _setup(hass)
+    client = await hass_ws_client(hass)
+    plans = hass.config.path(PLANS_DIR)
+
+    url, name = await _upload(client, "d1", b"PLAN", ext="png")
+    rev = (await _save(client, await _cfg([{"id": "d1", "plan_url": url}]), 0))["result"]["rev"]
+    assert await hass.async_add_executor_job(os.path.isfile, os.path.join(plans, name))
+
+    # detach: the space stays, its plan does not
+    rev = (await _save(client, await _cfg([{"id": "d1", "plan_url": None}]), rev))["result"]["rev"]
+    assert await hass.async_add_executor_job(os.path.isfile, os.path.join(plans, name)), (
+        "the editor says the image stays on disk — it has to actually stay"
+    )
+
+    # a restart does not change its mind either
+    entry = hass.config_entries.async_entries(DOMAIN)[0]
+    assert await hass.config_entries.async_reload(entry.entry_id)
+    await hass.async_block_till_done()
+    assert await hass.async_add_executor_job(os.path.isfile, os.path.join(plans, name))
+
+    # re-attach, then replace: THAT removes the one it replaced
+    rev = (await _save(client, await _cfg([{"id": "d1", "plan_url": url}]), rev))["result"]["rev"]
+    url2, name2 = await _upload(client, "d1", b"NEWPLAN", ext="png")
+    rev = (await _save(client, await _cfg([{"id": "d1", "plan_url": url2}]), rev))["result"]["rev"]
+    assert await hass.async_add_executor_job(os.path.isfile, os.path.join(plans, name2))
+    assert not await hass.async_add_executor_job(os.path.isfile, os.path.join(plans, name))
+
+    # and deleting the space keeps its plan
+    await _save(client, await _cfg([]), rev)
+    await hass.async_block_till_done()
+    assert await hass.async_add_executor_job(os.path.isfile, os.path.join(plans, name2))
diff --git a/tests_backend/test_validation.py b/tests_backend/test_validation.py
index bed59412..d193c030 100644
--- a/tests_backend/test_validation.py
+++ b/tests_backend/test_validation.py
@@ -265,17 +265,6 @@ def test_collect_plans_keeps_a_fresh_unreferenced_upload(tmp_path):
     assert (d / "f1.inflight.png").is_file()
 
 
-def test_collect_plans_takes_an_aged_orphan(tmp_path):
-    collect_plans = plans.collect_plans
-
-    d = _plans(tmp_path, ["f1.keep.png"])
-    # past the long grace, and belonging to no space in the config
-    _plans(tmp_path, ["f1.abandoned.png"], age=const.SCHEDULED_GRACE_S + 60)
-    removed = collect_plans(d, _cfg("/p/f1.keep.png"), _cfg("/p/f1.keep.png"))
-    assert removed == 1
-    assert (d / "f1.keep.png").is_file() and not (d / "f1.abandoned.png").exists()
-
-
 def test_collect_plans_never_touches_a_referenced_or_foreign_file(tmp_path):
     PLAN_ORPHAN_TTL_S = const.PLAN_ORPHAN_TTL_S
     collect_plans = plans.collect_plans
@@ -477,31 +466,6 @@ def test_attachment_refs_reads_marker_urls():
     assert plans.attachment_refs(cfg) == set()
 
 
-def test_collect_attachments_supersedes_and_ages(tmp_path):
-    import os
-    import time
-
-    collect_attachments = plans.collect_attachments
-    files = tmp_path / "files"
-    (files / "m1").mkdir(parents=True)
-    for n in ("old.pdf", "new.pdf", "cancelled.pdf"):
-        (files / "m1" / n).write_bytes(b"x")
-
-    # the commit swapped old.pdf for new.pdf; cancelled.pdf is a fresh upload
-    # nobody saved — it may belong to a dialog that is still open
-    removed = collect_attachments(files, _acfg("m1/old.pdf"), _acfg("m1/new.pdf"))
-    assert removed == 1
-    assert not (files / "m1" / "old.pdf").exists()
-    assert (files / "m1" / "new.pdf").is_file()
-    assert (files / "m1" / "cancelled.pdf").is_file()
-
-    old = time.time() - const.SCHEDULED_GRACE_S - 60
-    os.utime(files / "m1" / "cancelled.pdf", (old, old))
-    assert collect_attachments(files, _acfg("m1/new.pdf"), _acfg("m1/new.pdf")) == 1
-    assert not (files / "m1" / "cancelled.pdf").exists()
-    assert (files / "m1" / "new.pdf").is_file()
-
-
 def test_collect_attachments_removes_the_empty_folder_and_never_raises(tmp_path):
     import os
     import time
@@ -554,83 +518,151 @@ def test_legacy_segments_are_dropped_by_the_server():
     assert "segments" not in out
 
 
-def test_scheduled_collection_never_takes_a_detached_plan(tmp_path):
-    """2026-07-28, on the author's own instance: two plans were deleted.
-
-    Detaching a plan (switching a space to "draw") is reversible and the editor
-    says the file stays on disk. The timer only knows "nothing points at it",
-    applied the one-hour orphan rule, and removed images that had been detached
-    weeks earlier. A commit may still collect what it superseded — it knows it
-    replaced something. The timer may not.
-    """
+def _aged(path, seconds):
     import os
     import time
 
+    t = time.time() - seconds
+    os.utime(path, (t, t))
+
+
+def _sp(sid, url):
+    return {"id": sid, "plan_url": f"/api/houseplan/content/plans/_/{url}" if url else None}
+
+
+def test_plan_collection_matrix(tmp_path):
+    """Which config transition means "the user asked for this file to go"?
+
+    `old_refs - new_refs` cannot tell replace, detach and delete-space apart —
+    they look identical. v1.46.4/v1.46.5 added guards for detach and only ever
+    reached them on the scheduled pass, so the commit itself still deleted a
+    detached plan the moment it was detached (HP-1465-01). One case is a
+    deletion the user asked for; the rest are kept.
+    """
+    collect = plans.collect_plans
     d = tmp_path / "plans"
     d.mkdir()
-    for n in ("f1.svg", "f2.tok.png", "gone.old.png"):
-        (d / n).write_bytes(b"x")
-        t = time.time() - const.SCHEDULED_GRACE_S - 60
-        os.utime(d / n, (t, t))
 
-    cfg = {"spaces": [{"id": "f1", "plan_url": None},          # detached, space alive
-                      {"id": "f2", "plan_url": None}]}         # same
-    assert plans.collect_plans(d, cfg, cfg) == 1
-    assert (d / "f1.svg").is_file(), "a detached plan of a live space is kept, at any age"
-    assert (d / "f2.tok.png").is_file()
-    assert not (d / "gone.old.png").exists(), "a plan of a deleted space ages out after a month"
+    def seed(*names):
+        for n in names:
+            (d / n).write_bytes(b"x")
+            _aged(d / n, const.SCHEDULED_GRACE_S * 2)  # old enough for any rule
 
-    # a space that HAS a plan: its other files can only be its own rejects
-    import os
-    import time
+    # 1. replace: the user picked a different image for the same space
+    seed("f1.old.png", "f1.new.png")
+    assert collect(d, {"spaces": [_sp("f1", "f1.old.png")]},
+                      {"spaces": [_sp("f1", "f1.new.png")]}) == 1
+    assert not (d / "f1.old.png").exists() and (d / "f1.new.png").is_file()
 
-    (d / "f9.current.png").write_bytes(b"x")
-    (d / "f9.reject.png").write_bytes(b"x")
-    hour = time.time() - const.PLAN_ORPHAN_TTL_S - 60
-    os.utime(d / "f9.reject.png", (hour, hour))
-    live = {"spaces": [{"id": "f1", "plan_url": None}, {"id": "f2", "plan_url": None},
-                       {"id": "f9", "plan_url": "/p/f9.current.png"}]}
-    assert plans.collect_plans(d, live, live) == 1
-    assert (d / "f9.current.png").is_file()
-    assert not (d / "f9.reject.png").exists()
+    # 2. detach: same space, switched to "draw"
+    seed("f2.png")
+    assert collect(d, {"spaces": [_sp("f2", "f2.png")]},
+                      {"spaces": [_sp("f2", None)]}) == 0
+    assert (d / "f2.png").is_file(), "the editor says the file stays — it stays"
 
-    # a commit still removes what it SUPERSEDED — that it knows for certain
-    old = {"spaces": [{"id": "f1", "plan_url": "/p/f1.svg"}, {"id": "f2", "plan_url": None}]}
-    new = {"spaces": [{"id": "f1", "plan_url": "/p/f1.new.png"}, {"id": "f2", "plan_url": None}]}
-    (d / "f1.new.png").write_bytes(b"x")
-    assert plans.collect_plans(d, old, new) == 1
-    assert not (d / "f1.svg").exists()
-    assert (d / "f2.tok.png").is_file(), "and still touches nothing else of a live space"
+    # 3. the space is deleted outright
+    seed("f3.png")
+    assert collect(d, {"spaces": [_sp("f3", "f3.png")]}, {"spaces": []}) == 0
+    assert (d / "f3.png").is_file()
+
+    # 4. the scheduled pass, later, still keeps both
+    cfg = {"spaces": [_sp("f2", None)]}
+    assert collect(d, cfg, cfg) == 0
+    assert (d / "f2.png").is_file() and (d / "f3.png").is_file()
+
+    # 5. an upload whose save was rejected is kept too, at any age. Ageing those
+    #    out raced the retry: the sweep deleted a file the save was committing a
+    #    reference to (caught by test_sweep_and_a_config_write_do_not_race).
+    seed("f4.current.png", "f4.reject.png")
+    live = {"spaces": [_sp("f4", "f4.current.png")]}
+    assert collect(d, live, live) == 0
+    assert (d / "f4.current.png").is_file() and (d / "f4.reject.png").is_file()
+
+    # 6. the same file still referenced by another space is never touched
+    seed("shared.png")
+    assert collect(d, {"spaces": [_sp("a", "shared.png"), _sp("b", "shared.png")]},
+                      {"spaces": [_sp("a", None), _sp("b", "shared.png")]}) == 0
+    assert (d / "shared.png").is_file()
 
 
-def test_attachment_grace_is_a_month_outside_a_staging_folder(tmp_path):
-    """A staging folder is unambiguous; a marker folder is not.
+def test_attachment_collection_matrix(tmp_path):
+    """Removing an attachment is a trash button; deleting the device is not."""
+    collect = plans.collect_attachments
 
-    `up_*` only ever holds an upload from a dialog that was never saved, so an
-    hour is right there. A marker's own folder may hold a file that is merely
-    unreferenced at the moment, and one hour of that turned out to be a way to
-    lose data (2026-07-28).
-    """
+    def case(name):
+        d = tmp_path / name
+        d.mkdir()
+        return d
+
+    def seed(root, folder, fname, age=None):
+        (root / folder).mkdir(parents=True, exist_ok=True)
+        p = root / folder / fname
+        p.write_bytes(b"x")
+        if age:
+            _aged(p, age)
+        return p
+
+    def cfg(*markers):
+        return {"markers": [
+            {"id": mid, "pdfs": [{"url": f"/api/houseplan/content/files/{mid}/{n}"} for n in names]}
+            for mid, names in markers
+        ]}
+
+    # 1. the user removed one attachment from a device that still exists
+    d = case("dropped")
+    seed(d, "m1", "dropped.pdf")
+    seed(d, "m1", "kept.pdf")
+    assert collect(d, cfg(("m1", ["dropped.pdf", "kept.pdf"])), cfg(("m1", ["kept.pdf"]))) == 1
+    assert not (d / "m1" / "dropped.pdf").exists()
+    assert (d / "m1" / "kept.pdf").is_file()
+
+    # 2. the device itself is gone: its manuals are not ours to throw away
+    d = case("device_gone")
+    seed(d, "m2", "manual.pdf", age=const.SCHEDULED_GRACE_S * 2)
+    assert collect(d, cfg(("m2", ["manual.pdf"])), cfg()) == 0
+    assert (d / "m2" / "manual.pdf").is_file()
+    # and the scheduled pass, later, agrees
+    assert collect(d, cfg(), cfg()) == 0
+    assert (d / "m2" / "manual.pdf").is_file()
+
+    # 3. a dialog that was never saved, in its own staging folder
+    d = case("staging")
+    seed(d, "up_x", "manual.pdf", age=const.PLAN_ORPHAN_TTL_S + 60)
+    assert collect(d, cfg(), cfg()) == 1
+    assert not (d / "up_x").exists()
+
+    # 4. an upload into a live device's folder whose save was rejected: kept,
+    #    for the same reason as a plan's — a retry may be about to reference it
+    d = case("reject")
+    seed(d, "m3", "current.pdf")
+    seed(d, "m3", "rejected.pdf", age=const.SCHEDULED_GRACE_S + 60)
+    live = cfg(("m3", ["current.pdf"]))
+    assert collect(d, live, live) == 0
+    assert (d / "m3" / "current.pdf").is_file()
+    assert (d / "m3" / "rejected.pdf").is_file()
+
+
+def test_only_a_staging_folder_ages_out(tmp_path):
+    """The one age rule left. Everything else waits for the user to say so."""
     import os
     import time
 
     files = tmp_path / "files"
     (files / "m1").mkdir(parents=True)
     (files / "up_abandoned").mkdir(parents=True)
+    ancient = time.time() - const.SCHEDULED_GRACE_S * 12
     hour_ago = time.time() - const.PLAN_ORPHAN_TTL_S - 60
-    month_ago = time.time() - const.SCHEDULED_GRACE_S - 60
 
     for path, when in (
-        ((files / "m1" / "recent.pdf"), hour_ago),
-        ((files / "m1" / "ancient.pdf"), month_ago),
+        ((files / "m1" / "ancient.pdf"), ancient),
         ((files / "up_abandoned" / "manual.pdf"), hour_ago),
     ):
         path.write_bytes(b"x")
         os.utime(path, (when, when))
 
     cfg = {"markers": [{"id": "m1", "pdfs": []}]}
-    removed = plans.collect_attachments(files, cfg, cfg)
-    assert (files / "m1" / "recent.pdf").is_file(), "an hour is not enough for a marker file"
-    assert not (files / "m1" / "ancient.pdf").exists(), "a month is"
-    assert not (files / "up_abandoned").exists(), "a cancelled dialog still goes after an hour"
-    assert removed == 2
+    assert plans.collect_attachments(files, cfg, cfg) == 1
+    assert (files / "m1" / "ancient.pdf").is_file(), "age alone is never a reason"
+    assert not (files / "up_abandoned").exists(), "a cancelled dialog goes after an hour"
+
+