diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1e04a346..f13d3ebe 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,14 @@
 
 # Changelog
 
+## Sprint 36 PostgreSQL collation maintenance visibility (2026-06-17)
+
+- Added database collation version reporting to `scripts/live_migration_smoke.sh`.
+- The live smoke now prints `COLLATION_VERSION_MISMATCH` plus the exact `ALTER DATABASE ... REFRESH COLLATION VERSION` acknowledgement command when an old PostGIS volume is reused on a newer runtime.
+- Documented the Unraid maintenance procedure and backup/index review guidance.
+- Added regression coverage for the collation mismatch reporting path.
+- No API contracts, migrations, product features, provider fetching or AI behavior were introduced.
+
 ## Sprint 35 Docker runtime secret hygiene (2026-06-17)
 
 - Removed embedded PostGIS database name/user/password defaults from `deploy/unraid/Dockerfile.all-in-one` image metadata.
diff --git a/backend/tests/test_live_migration_smoke_script.py b/backend/tests/test_live_migration_smoke_script.py
index 1302fab0..039da361 100644
--- a/backend/tests/test_live_migration_smoke_script.py
+++ b/backend/tests/test_live_migration_smoke_script.py
@@ -22,3 +22,13 @@ def test_live_migration_smoke_checks_required_runtime_schema_objects() -> None:
     assert '"public.detections"' in content
     assert '"public.segmentations"' in content
     assert '"public.ix_segmentations_geometry"' in content
+
+
+def test_live_migration_smoke_reports_collation_version_mismatch_without_failing() -> None:
+    script = Path(__file__).resolve().parents[2] / "scripts" / "live_migration_smoke.sh"
+    content = script.read_text(encoding="utf-8")
+
+    assert "pg_database_collation_actual_version(oid)" in content
+    assert "COLLATION_VERSION_MISMATCH" in content
+    assert "REFRESH COLLATION VERSION" in content
+    assert "Database collation version: ok" in content
diff --git a/deploy/unraid/README.md b/deploy/unraid/README.md
index be700c6e..f01f1493 100644
--- a/deploy/unraid/README.md
+++ b/deploy/unraid/README.md
@@ -91,6 +91,22 @@ curl -I "http://192.168.10.150:${GEOINTEL_FRONTEND_PORT:-1202}/geointel-icon.svg
 curl -I "http://192.168.10.150:${GEOINTEL_FRONTEND_PORT:-1202}/geointel-icon.png"
 ```
 
+The live migration smoke also checks PostgreSQL database collation metadata.
+When reusing a PostGIS volume created by an older Debian/glibc runtime, it may
+print `COLLATION_VERSION_MISMATCH`. This is a maintenance warning, not an app
+startup failure. Review backups first, then acknowledge the new runtime
+collation version inside the running container:
+
+```bash
+docker exec -it geointel psql -U "${GEOINTEL_POSTGRES_USER:-geointel}" -d "${GEOINTEL_POSTGRES_DB:-geointel}"
+ALTER DATABASE "geointel" REFRESH COLLATION VERSION;
+```
+
+If you rely on text indexes with locale-specific ordering, plan a maintenance
+window and rebuild the affected indexes before acknowledging the version. The
+current GeoIntel V1 spatial workflows primarily use UUIDs, JSON metadata and
+PostGIS geometry indexes, but the warning should still be tracked explicitly.
+
 ## Change the browser port
 
 Edit `.env`:
diff --git a/docs/CODEX_EXECUTION_LOG.md b/docs/CODEX_EXECUTION_LOG.md
index 53a369b3..015e088b 100644
--- a/docs/CODEX_EXECUTION_LOG.md
+++ b/docs/CODEX_EXECUTION_LOG.md
@@ -1627,3 +1627,30 @@ Limitations:
 
 Next recommended pass:
 - Run release readiness, rebuild/deploy Tower and verify browser/GIS/demo smoke again.
+
+## Sprint 36 PostgreSQL collation maintenance visibility (2026-06-17)
+
+Changed:
+- Added PostgreSQL database collation version reporting to `scripts/live_migration_smoke.sh`.
+- The live smoke now prints `COLLATION_VERSION_MISMATCH` with stored and actual versions when a reused PostGIS volume was created under an older libc/collation runtime.
+- The smoke also prints the exact `ALTER DATABASE "... " REFRESH COLLATION VERSION;` acknowledgement command, but does not run it automatically.
+- Documented the Unraid maintenance procedure and backup/index review guidance.
+- Added regression coverage for the collation reporting path.
+
+Tested:
+- `cd backend && python -m pytest tests/test_live_migration_smoke_script.py -q`
+- `bash -n scripts/live_migration_smoke.sh`
+- `python -m compileall backend/app`
+- `cd backend && python -m pytest -W error::DeprecationWarning`
+- `cd frontend && npm run typecheck`
+- `cd frontend && npm run build`
+- `bash scripts/run_readiness_check.sh`
+
+Open:
+- Run the updated smoke against Tower to confirm whether the reused volume still reports a collation mismatch.
+
+Limitations:
+- The smoke reports and documents the maintenance action. It intentionally does not mutate collation metadata automatically.
+
+Next recommended pass:
+- Run release readiness, deploy Tower and decide whether to manually acknowledge the current collation version.
diff --git a/docs/TODO.md b/docs/TODO.md
index a72fa776..c89c6b60 100644
--- a/docs/TODO.md
+++ b/docs/TODO.md
@@ -13,6 +13,7 @@ This file now starts with the current implementation status. Older preparation/b
 - [x] Add Unraid Compose template assets with editable ports, storage path and app icon.
 - [x] Add single-container Unraid runtime with embedded PostGIS, backend and frontend.
 - [x] Remove embedded PostGIS password defaults from all-in-one Docker image metadata.
+- [x] Report reused-volume PostgreSQL collation mismatches in live migration smoke.
 
 ## Current implementation status
 
diff --git a/scripts/live_migration_smoke.sh b/scripts/live_migration_smoke.sh
index 2b662c6a..9a89ed55 100755
--- a/scripts/live_migration_smoke.sh
+++ b/scripts/live_migration_smoke.sh
@@ -69,6 +69,26 @@ required_objects = [
 with get_engine().connect() as connection:
     postgis_version = connection.execute(text("SELECT PostGIS_Version()")).scalar()
     print(f"PostGIS version: {postgis_version}")
+    collation_row = connection.execute(
+        text(
+            "SELECT datname, datcollversion, pg_database_collation_actual_version(oid) AS actual_version "
+            "FROM pg_database WHERE datname = current_database()"
+        )
+    ).mappings().one()
+    stored_version = collation_row["datcollversion"]
+    actual_version = collation_row["actual_version"]
+    if stored_version != actual_version:
+        database_name = str(collation_row["datname"]).replace('"', '""')
+        print(
+            "COLLATION_VERSION_MISMATCH: "
+            f"database={collation_row['datname']} stored={stored_version} actual={actual_version}"
+        )
+        print(
+            "After reviewing backups and indexes, acknowledge with: "
+            f'ALTER DATABASE "{database_name}" REFRESH COLLATION VERSION;'
+        )
+    else:
+        print("Database collation version: ok")
 
     missing = [
         object_name
@@ -154,6 +174,26 @@ required_objects = [
 with get_engine().connect() as connection:
     postgis_version = connection.execute(text("SELECT PostGIS_Version()")).scalar()
     print(f"PostGIS version: {postgis_version}")
+    collation_row = connection.execute(
+        text(
+            "SELECT datname, datcollversion, pg_database_collation_actual_version(oid) AS actual_version "
+            "FROM pg_database WHERE datname = current_database()"
+        )
+    ).mappings().one()
+    stored_version = collation_row["datcollversion"]
+    actual_version = collation_row["actual_version"]
+    if stored_version != actual_version:
+        database_name = str(collation_row["datname"]).replace('"', '""')
+        print(
+            "COLLATION_VERSION_MISMATCH: "
+            f"database={collation_row['datname']} stored={stored_version} actual={actual_version}"
+        )
+        print(
+            "After reviewing backups and indexes, acknowledge with: "
+            f'ALTER DATABASE "{database_name}" REFRESH COLLATION VERSION;'
+        )
+    else:
+        print("Database collation version: ok")
 
     missing = [
         object_name
@@ -267,6 +307,26 @@ required_objects = [
 with get_engine().connect() as connection:
     postgis_version = connection.execute(text("SELECT PostGIS_Version()")).scalar()
     print(f"PostGIS version: {postgis_version}")
+    collation_row = connection.execute(
+        text(
+            "SELECT datname, datcollversion, pg_database_collation_actual_version(oid) AS actual_version "
+            "FROM pg_database WHERE datname = current_database()"
+        )
+    ).mappings().one()
+    stored_version = collation_row["datcollversion"]
+    actual_version = collation_row["actual_version"]
+    if stored_version != actual_version:
+        database_name = str(collation_row["datname"]).replace('"', '""')
+        print(
+            "COLLATION_VERSION_MISMATCH: "
+            f"database={collation_row['datname']} stored={stored_version} actual={actual_version}"
+        )
+        print(
+            "After reviewing backups and indexes, acknowledge with: "
+            f'ALTER DATABASE "{database_name}" REFRESH COLLATION VERSION;'
+        )
+    else:
+        print("Database collation version: ok")
 
     missing = [
         object_name