diff --git a/backend/src/routes/admin.ts b/backend/src/routes/admin.ts
index dd3cfd8..fe9d129 100755
--- a/backend/src/routes/admin.ts
+++ b/backend/src/routes/admin.ts
@@ -340,6 +340,18 @@ router.get('/items', asyncRoute(async (req: Request, res: Response) => {
     return res.status(400).json({ error: 'favorites is not a valid inventory filter' });
   }
 
+  // S2077 flags every query below that assembles its SQL as a template literal,
+  // and this is the one where that is more than a formality: `where` really is
+  // built at run time. What makes it safe is that buildItemFilterSql composes
+  // only string literals written in itemFilters.ts. The single interpolation
+  // inside any of them is `$${next}` — a placeholder index, a number, seeded
+  // from the startIndex argument and incremented locally. It is never derived
+  // from a filter value.
+  //
+  // So a caller chooses which of six fixed fragments are joined, and supplies
+  // every value in `params`, and neither of those becomes SQL. parseItemFilters
+  // rejects malformed input above, but that is defence in depth rather than the
+  // reason this holds — the clause literals would be safe without it.
   const { clauses, params } = buildItemFilterSql(filters, 1, null);
   const where = clauses.length ? `WHERE ${clauses.join(' AND ')}` : '';
   const { rows } = await pool.query<AdminItemRow>(`${ADMIN_ITEM_SELECT} ${where} ORDER BY i.created_at DESC`, params);
@@ -367,6 +379,11 @@ router.post('/items', uploadImages, asyncRoute(async (req: Request, res: Respons
       await setItemTags(client, item.id, await resolveTagIds(client, tagNames));
     }
     await client.query('COMMIT');
+    // S2077 again, and here the template is a module constant plus a literal:
+    // ADMIN_ITEM_SELECT interpolates nothing of its own, and the id is bound as
+    // $1 rather than formatted in. Same shape as the update route below, where
+    // the bound value is caller-supplied — which is precisely why it is a
+    // parameter.
     const { rows: full } = await pool.query<AdminItemRow>(`${ADMIN_ITEM_SELECT} WHERE i.id = $1`, [item.id]);
     res.json(requireRow(full, 'the item just inserted'));
   } catch (err) {
@@ -415,6 +432,9 @@ router.put('/items/:id', uploadImages, asyncRoute(async (req: Request, res: Resp
       await insertItemImages(client, Number(req.params.id), files, nextSort);
     }
     await client.query('COMMIT');
+    // S2077, the same constant-plus-$1 shape as the create route above.
+    // req.params.id is caller-controlled and goes through the driver as a bound
+    // parameter; it never reaches the query text.
     const { rows: full } = await pool.query<AdminItemRow>(`${ADMIN_ITEM_SELECT} WHERE i.id = $1`, [req.params.id]);
     res.json(full[0]);
   } catch (err) {