diff --git a/apps/api/scripts/convert_doenetml_0.7dev_to_0.7.ts b/apps/api/scripts/convert_doenetml_0.7dev_to_0.7.ts
new file mode 100644
index 000000000..39a24917e
--- /dev/null
+++ b/apps/api/scripts/convert_doenetml_0.7dev_to_0.7.ts
@@ -0,0 +1,102 @@
+// One-off migration: move a single user's documents off the `0.7dev`
+// DoenetML version and onto the released `0.7` version.
+//
+// Prisma is used (rather than a raw SQL query against prod) so that the
+// version rows are looked up by their `displayedVersion` string instead of a
+// hard-coded id, and so there is no chance of a typo in a manual UPDATE.
+//
+// It resolves the source version (`0.7dev`) and target version (`0.7`) by
+// their `displayedVersion`, finds the requested owner by `username`, and
+// repoints every `content` row that user owns from the source to the target
+// version id.
+//
+// Usage:
+//   Local dev (tsx available), DATABASE_URL pointed at the target DB:
+//     npx tsx scripts/convert_doenetml_0.7dev_to_0.7.ts <username> [--dry-run]
+//   Inside the prod/dev3 container (devDeps pruned, run the compiled JS from
+//   the apps/api WORKDIR; reach a shell via infra/scripts/exec.sh -s <stack>):
+//     node dist/scripts/convert_doenetml_0.7dev_to_0.7.js <username> [--dry-run]
+//
+// --dry-run reports how many rows would change and exits without writing.
+// Always run --dry-run first against a new environment (especially prod).
+
+import { PrismaClient } from "@prisma/client";
+
+const prisma = new PrismaClient();
+
+const FROM_VERSION = "0.7dev";
+const TO_VERSION = "0.7";
+
+async function main() {
+  const args = process.argv.slice(2);
+  const dryRun = args.includes("--dry-run");
+  const username = args.find((a) => !a.startsWith("--"));
+
+  if (!username) {
+    console.error(
+      "Usage: convert_doenetml_0.7dev_to_0.7 <username> [--dry-run]",
+    );
+    process.exit(1);
+  }
+
+  const fromVersion = await prisma.doenetmlVersions.findUnique({
+    where: { displayedVersion: FROM_VERSION },
+  });
+  const toVersion = await prisma.doenetmlVersions.findUnique({
+    where: { displayedVersion: TO_VERSION },
+  });
+
+  if (!fromVersion) {
+    console.error(
+      `No doenetmlVersions row with displayedVersion="${FROM_VERSION}".`,
+    );
+    process.exit(1);
+  }
+  if (!toVersion) {
+    console.error(
+      `No doenetmlVersions row with displayedVersion="${TO_VERSION}".`,
+    );
+    process.exit(1);
+  }
+
+  const user = await prisma.users.findUnique({
+    where: { username },
+    select: { userId: true },
+  });
+  if (!user) {
+    console.error(`No users row with username="${username}".`);
+    process.exit(1);
+  }
+
+  const where = {
+    ownerId: user.userId,
+    doenetmlVersionId: fromVersion.id,
+  };
+
+  const count = await prisma.content.count({ where });
+  console.log(
+    `${username}: ${count} content row(s) at "${FROM_VERSION}" (id=${fromVersion.id}) ` +
+      `to move to "${TO_VERSION}" (id=${toVersion.id}).`,
+  );
+
+  if (dryRun) {
+    console.log(`[dry-run] would update ${count} row(s). No changes made.`);
+    return;
+  }
+
+  const result = await prisma.content.updateMany({
+    where,
+    data: { doenetmlVersionId: toVersion.id },
+  });
+  console.log(`Done. Updated ${result.count} content row(s).`);
+}
+
+main()
+  .then(async () => {
+    await prisma.$disconnect();
+  })
+  .catch(async (e) => {
+    console.error(e);
+    await prisma.$disconnect();
+    process.exit(1);
+  });