diff --git a/realtime-box/README.md b/realtime-box/README.md
new file mode 100644
index 00000000..5d7104d0
--- /dev/null
+++ b/realtime-box/README.md
@@ -0,0 +1,7 @@
+# Realtime Box
+
+Workflow templates for **Treasure AI RT 2.0** features.
+
+## Contents
+
+- [Lookup Catalog Sync](./lookup-catalog-sync) — Sync tables from `cdp_lookup_catalog` to RT 2.0 internal storage for use in real-time personalization.
diff --git a/realtime-box/lookup-catalog-sync/README.md b/realtime-box/lookup-catalog-sync/README.md
new file mode 100644
index 00000000..14726d1b
--- /dev/null
+++ b/realtime-box/lookup-catalog-sync/README.md
@@ -0,0 +1,21 @@
+# Lookup Catalog Sync Workflow
+
+Digdag workflow templates to sync tables from the `cdp_lookup_catalog` database to RT 2.0 internal storage. Only changed records are uploaded on each run (hash-based change detection).
+
+## Variants
+
+| Variant | When to use |
+|---------|-------------|
+| [manual/](./manual) | Fewer than 5 tables, schemas change infrequently, or you need explicit control over column selection. |
+| [table-discovery/](./table-discovery) | 5 or more tables, schemas change frequently, or you prefer zero-maintenance automatic table detection. Requires an additional feature flag — contact Treasure AI Support. |
+
+## Common Requirements
+
+- A `cdp_lookup_catalog` database must exist in Data Workbench with lookup tables already created.
+- Each lookup table must have its primary key as the **first column** (unique, non-null, not named `time`, type `string`/`int`/`long`).
+- A TD API key must be stored in the workflow project's Secrets as `td.apikey`.
+- The `reactor_importer_endpoint` and `reactor_instance` values must be obtained from Treasure AI Support or your Customer Success Manager.
+
+## Documentation
+
+See the [Lookup Catalog Sync Workflow](https://docs.treasuredata.com/products/customer-data-platform/real-time/lookup-catalog-workflow) page in the Treasure AI documentation portal for full setup instructions, scheduling recommendations, and troubleshooting.
diff --git a/realtime-box/lookup-catalog-sync/manual/README.md b/realtime-box/lookup-catalog-sync/manual/README.md
new file mode 100644
index 00000000..2aa5c2c8
--- /dev/null
+++ b/realtime-box/lookup-catalog-sync/manual/README.md
@@ -0,0 +1,23 @@
+# Lookup Catalog Sync — Manual Configuration
+
+Use this variant when you have a small number of tables and want explicit control over which columns are synced.
+
+## Setup
+
+1. Copy this directory into your TD Workflow project.
+2. Edit `lookup_catalog_sync.dig`:
+   - Set `reactor_importer_endpoint` (obtain from Treasure AI Support).
+   - Set `reactor_instance` (obtain from Treasure AI Support).
+   - Define each table under `tables:` with `name`, `key_column`, and `col_expr`.
+3. Store your TD API key in Secrets as `td.apikey`.
+4. Set a schedule and run once manually to verify the initial upload.
+
+## Files
+
+| File | Description |
+|------|-------------|
+| `lookup_catalog_sync.dig` | Main workflow — iterates over configured tables |
+| `queries/initialize_digest.sql` | Creates digest tracking table if not exists |
+| `queries/extract_updated.sql` | Extracts changed records by hash comparison |
+| `queries/check_count.sql` | Counts changed records |
+| `queries/update_digest.sql` | Updates digest table after upload |
diff --git a/realtime-box/lookup-catalog-sync/manual/lookup_catalog_sync.dig b/realtime-box/lookup-catalog-sync/manual/lookup_catalog_sync.dig
new file mode 100644
index 00000000..382fe0b3
--- /dev/null
+++ b/realtime-box/lookup-catalog-sync/manual/lookup_catalog_sync.dig
@@ -0,0 +1,91 @@
+_export:
+  # Obtain these values from Treasure AI Support or your Customer Success Manager
+  reactor_importer_endpoint: "https://<your-endpoint>"
+  reactor_instance: "<your-reactor-instance>"
+
+  td:
+    database: cdp_lookup_catalog
+
+  # Define each table to sync.
+  # key_column: primary key column name (must be the first column in the table)
+  # col_expr: SQL expression for each non-key column to include in the JSON payload
+  tables:
+    - name: limited_time_sale
+      key_column: product_id
+      col_expr: >-
+        '"discount_rate":' || json_format(cast(discount_rate AS json)),
+        '"sale_end":' || json_format(cast(sale_end AS json)),
+        '"banner_html":' || json_format(cast(banner_html AS json))
+
+    # Add more tables as needed:
+    # - name: user_product_coupon
+    #   key_column: user_product_id
+    #   col_expr: >-
+    #     '"has_coupon":' || json_format(cast(has_coupon AS json)),
+    #     '"coupon_code":' || json_format(cast(coupon_code AS json))
+
++sync_all_tables:
+  for_each>:
+    table_config: ${tables}
+  _parallel:
+    limit: 2
+  _do:
+    +log_start:
+      echo>: "Processing ${table_config.name}"
+
+    +init_digests:
+      td>: queries/initialize_digest.sql
+      database: ${td.database}
+
+    +extract_updated:
+      td>: queries/extract_updated.sql
+      database: ${td.database}
+
+    +check_count:
+      td>: queries/check_count.sql
+      database: ${td.database}
+      store_last_results: true
+
+    +upload_if_needed:
+      if>: ${td.last_results.row_count > 0}
+      _do:
+        +log_upload:
+          echo>: "Uploading ${td.last_results.row_count} changed records for ${table_config.name}"
+
+        +upload:
+          td>:
+          database: ${td.database}
+          query: |
+            SELECT
+              ${table_config.key_column},
+              payload
+            FROM _wf_${table_config.name}_updated
+          result_url: |
+            {
+              "type": "rest",
+              "method": "POST",
+              "authorization": "${secret:td.apikey}",
+              "endpoint": "${reactor_importer_endpoint}/internal/lookup-catalog/bulk-load",
+              "headers": "{\"x-reactor-instance-name\": \"${reactor_instance}\", \"x-lookup-table-name\":\"${table_config.name}\"}",
+              "parallelism": "10",
+              "page_size": 1000
+            }
+
+        +update_digests:
+          td>: queries/update_digest.sql
+          database: ${td.database}
+
+        +rename_digests:
+          td_ddl>:
+            rename_tables:
+              - from: _wf_${table_config.name}_digests_new
+                to: _wf_${table_config.name}_digests
+
+      _else_do:
+        +log_no_updates:
+          echo>: "No changes for ${table_config.name}"
+
+    +cleanup:
+      td_ddl>:
+        drop_tables:
+          - _wf_${table_config.name}_updated
diff --git a/realtime-box/lookup-catalog-sync/manual/queries/check_count.sql b/realtime-box/lookup-catalog-sync/manual/queries/check_count.sql
new file mode 100644
index 00000000..c90924db
--- /dev/null
+++ b/realtime-box/lookup-catalog-sync/manual/queries/check_count.sql
@@ -0,0 +1,2 @@
+SELECT COUNT(*) AS row_count
+FROM _wf_${table_config.name}_updated
diff --git a/realtime-box/lookup-catalog-sync/manual/queries/extract_updated.sql b/realtime-box/lookup-catalog-sync/manual/queries/extract_updated.sql
new file mode 100644
index 00000000..8e37483c
--- /dev/null
+++ b/realtime-box/lookup-catalog-sync/manual/queries/extract_updated.sql
@@ -0,0 +1,19 @@
+DROP TABLE IF EXISTS _wf_${table_config.name}_updated;
+
+CREATE TABLE _wf_${table_config.name}_updated AS
+WITH src AS (
+  SELECT
+    ${table_config.key_column},
+    '{' || array_join(ARRAY[${table_config.col_expr}], ',') || '}' AS payload
+  FROM cdp_lookup_catalog.${table_config.name}
+)
+SELECT
+  src.${table_config.key_column},
+  src.payload
+FROM src
+WHERE NOT EXISTS (
+  SELECT 1
+  FROM _wf_${table_config.name}_digests dig
+  WHERE dig.${table_config.key_column} = src.${table_config.key_column}
+    AND dig.payload_xxhash64 = from_big_endian_64(xxhash64(to_utf8(src.payload)))
+)
diff --git a/realtime-box/lookup-catalog-sync/manual/queries/initialize_digest.sql b/realtime-box/lookup-catalog-sync/manual/queries/initialize_digest.sql
new file mode 100644
index 00000000..544b1ecd
--- /dev/null
+++ b/realtime-box/lookup-catalog-sync/manual/queries/initialize_digest.sql
@@ -0,0 +1,5 @@
+CREATE TABLE IF NOT EXISTS _wf_${table_config.name}_digests AS
+SELECT
+  CAST(NULL AS VARCHAR) AS ${table_config.key_column},
+  CAST(NULL AS BIGINT) AS payload_xxhash64
+LIMIT 0
diff --git a/realtime-box/lookup-catalog-sync/manual/queries/update_digest.sql b/realtime-box/lookup-catalog-sync/manual/queries/update_digest.sql
new file mode 100644
index 00000000..0dd54217
--- /dev/null
+++ b/realtime-box/lookup-catalog-sync/manual/queries/update_digest.sql
@@ -0,0 +1,12 @@
+DROP TABLE IF EXISTS _wf_${table_config.name}_digests_new;
+
+CREATE TABLE _wf_${table_config.name}_digests_new AS
+SELECT
+  ${table_config.key_column},
+  COALESCE(
+    from_big_endian_64(xxhash64(to_utf8(upd.payload))),
+    dig.payload_xxhash64
+  ) AS payload_xxhash64
+FROM _wf_${table_config.name}_updated upd
+FULL OUTER JOIN _wf_${table_config.name}_digests dig
+  USING (${table_config.key_column})
diff --git a/realtime-box/lookup-catalog-sync/table-discovery/README.md b/realtime-box/lookup-catalog-sync/table-discovery/README.md
new file mode 100644
index 00000000..9da528d5
--- /dev/null
+++ b/realtime-box/lookup-catalog-sync/table-discovery/README.md
@@ -0,0 +1,23 @@
+# Lookup Catalog Sync — Table Discovery
+
+Use this variant when you manage many tables or want the workflow to automatically detect new tables added to `cdp_lookup_catalog`.
+
+**Requires an additional feature flag.** Contact Treasure AI Support to enable it before using this variant.
+
+## Setup
+
+1. Copy this directory into your TD Workflow project.
+2. Edit `lookup_catalog_sync.dig`:
+   - Set `reactor_importer_endpoint` (obtain from Treasure AI Support).
+   - Set `reactor_instance` (obtain from Treasure AI Support).
+3. Store your TD API key in Secrets as `td.apikey`.
+4. Set a schedule and run once manually to verify the initial upload.
+
+## Files
+
+| File | Description |
+|------|-------------|
+| `lookup_catalog_sync.dig` | Main workflow — discovers and syncs all tables automatically |
+| `sync_table.dig` | Reusable single-table sync logic called by the main workflow |
+| `scripts/generate_sql.py` | Python script that generates type-aware extract SQL per table |
+| `queries/discover_tables.sql` | Discovers eligible tables, excludes `_wf_*` internal tables |
diff --git a/realtime-box/lookup-catalog-sync/table-discovery/lookup_catalog_sync.dig b/realtime-box/lookup-catalog-sync/table-discovery/lookup_catalog_sync.dig
new file mode 100644
index 00000000..0d0e1b82
--- /dev/null
+++ b/realtime-box/lookup-catalog-sync/table-discovery/lookup_catalog_sync.dig
@@ -0,0 +1,44 @@
+_export:
+  # Obtain these values from Treasure AI Support or your Customer Success Manager
+  reactor_importer_endpoint: "https://<your-endpoint>"
+  reactor_instance: "<your-reactor-instance>"
+
+  td:
+    database: cdp_lookup_catalog
+
+  # Leave empty to sync all discovered tables.
+  # Set to a specific table name to sync only that table (useful for testing).
+  p_table_name: ""
+
+  batch_size: 1000
+  parallelism: 10
+
++main:
+  +init_digest_tables:
+    td_for_each>: queries/discover_tables.sql
+    _do:
+      +create_digest:
+        td>:
+        database: ${td.database}
+        query: |
+          CREATE TABLE IF NOT EXISTS _wf_${td.each.table_name}_digests (
+            _key varchar,
+            payload_xxhash64 bigint,
+            time bigint
+          )
+
+  +sync_tables:
+    if>: ${p_table_name != ""}
+    _do:
+      +sync_single:
+        call>: sync_table.dig
+        _export:
+          table_name: ${p_table_name}
+    _else_do:
+      +sync_all:
+        td_for_each>: queries/discover_tables.sql
+        _do:
+          +sync_each:
+            call>: sync_table.dig
+            _export:
+              table_name: ${td.each.table_name}
diff --git a/realtime-box/lookup-catalog-sync/table-discovery/queries/discover_tables.sql b/realtime-box/lookup-catalog-sync/table-discovery/queries/discover_tables.sql
new file mode 100644
index 00000000..8cddca8c
--- /dev/null
+++ b/realtime-box/lookup-catalog-sync/table-discovery/queries/discover_tables.sql
@@ -0,0 +1,8 @@
+-- Discover all eligible tables in cdp_lookup_catalog.
+-- Excludes internal workflow tables (_wf_* prefix).
+SELECT table_name
+FROM information_schema.tables
+WHERE table_schema = '${td.database}'
+  AND table_name NOT LIKE '_wf_%'
+  AND table_type = 'BASE TABLE'
+ORDER BY table_name
diff --git a/realtime-box/lookup-catalog-sync/table-discovery/scripts/generate_sql.py b/realtime-box/lookup-catalog-sync/table-discovery/scripts/generate_sql.py
new file mode 100644
index 00000000..40486ea7
--- /dev/null
+++ b/realtime-box/lookup-catalog-sync/table-discovery/scripts/generate_sql.py
@@ -0,0 +1,132 @@
+"""
+Generates type-aware extract SQL for Lookup Catalog sync.
+
+Each column is serialized to JSON with type-specific handling:
+  - array(varchar): JSON array of strings with NULL element preservation
+  - array(bigint/integer): JSON array of integers
+  - array(double/real): JSON array of clean decimals (avoids floating-point artifacts)
+  - double/real (scalar): clean decimal (avoids floating-point artifacts)
+  - Other unsupported array types: raises ValueError
+  - All other types: string with quote escaping, NULL-safe
+
+The key column (first column) and the 'time' column are excluded from the payload.
+"""
+
+import json
+import digdag
+
+
+def _sql_null_wrap(col, inner_expr):
+    return f"CASE WHEN {col} IS NULL THEN 'null' ELSE {inner_expr} END"
+
+
+def _sql_string_expr(col):
+    return _sql_null_wrap(
+        col,
+        f"'\"' || replace(CAST({col} AS VARCHAR), '\"', '\\\\\"') || '\"'"
+    )
+
+
+def _sql_numeric_expr(col):
+    return _sql_null_wrap(col, f"CAST({col} AS VARCHAR)")
+
+
+def _sql_float_expr(col):
+    safe_cast = f"TRY(CAST({col} AS DECIMAL(30,10)))"
+    return _sql_null_wrap(
+        col,
+        f"COALESCE(regexp_replace(CAST({safe_cast} AS VARCHAR), '\\.?0+$', ''), CAST({col} AS VARCHAR))"
+    )
+
+
+def _sql_array_varchar_expr(col):
+    elem = "CASE WHEN x IS NULL THEN 'null' ELSE '\"' || replace(x, '\"', '\\\\\"') || '\"' END"
+    return _sql_null_wrap(col, f"'[' || array_join(transform({col}, x -> {elem}), ',') || ']'")
+
+
+def _sql_array_integer_expr(col):
+    elem = "CASE WHEN x IS NULL THEN 'null' ELSE CAST(x AS VARCHAR) END"
+    return _sql_null_wrap(col, f"'[' || array_join(transform({col}, x -> {elem}), ',') || ']'")
+
+
+def _sql_array_float_expr(col):
+    safe = "TRY(CAST(x AS DECIMAL(30,10)))"
+    elem = f"CASE WHEN x IS NULL THEN 'null' ELSE COALESCE(regexp_replace(CAST({safe} AS VARCHAR), '\\.?0+$', ''), CAST(x AS VARCHAR)) END"
+    return _sql_null_wrap(col, f"'[' || array_join(transform({col}, x -> {elem}), ',') || ']'")
+
+
+def _sql_expr_for_type(col, data_type):
+    t = data_type.lower()
+    if t.startswith("array(varchar"):
+        return _sql_array_varchar_expr(col)
+    if t.startswith(("array(bigint", "array(integer")):
+        return _sql_array_integer_expr(col)
+    if t.startswith(("array(double", "array(real")):
+        return _sql_array_float_expr(col)
+    if t.startswith("array("):
+        raise ValueError(f"Unsupported array column type '{data_type}' for column '{col}'. Flatten before ingestion.")
+    if t in ("double", "real"):
+        return _sql_float_expr(col)
+    # Default: string with quote escaping
+    return _sql_null_wrap(
+        col,
+        f"CASE WHEN TRY(CAST({col} AS DOUBLE)) IS NOT NULL THEN CAST({col} AS VARCHAR) "
+        f"ELSE '\"' || replace(CAST({col} AS VARCHAR), '\"', '\\\\\"') || '\"' END"
+    )
+
+
+def generate_extract_sql(database, table_name, columns, column_types=None, **kwargs):
+    if isinstance(columns, str):
+        columns = json.loads(columns)
+    if isinstance(column_types, str):
+        column_types = json.loads(column_types)
+
+    if not columns:
+        raise ValueError(f"No columns found for table {table_name}")
+
+    if column_types and len(column_types) != len(columns):
+        raise ValueError(
+            f"column_types length ({len(column_types)}) does not match "
+            f"columns length ({len(columns)}) for table {table_name}"
+        )
+
+    key_column = columns[0]
+    excluded = {key_column.lower(), "time"}
+
+    json_parts = []
+    for i, col in enumerate(columns):
+        if col.lower() in excluded:
+            continue
+        data_type = column_types[i] if column_types else "varchar"
+        expr = _sql_expr_for_type(col, data_type)
+        json_parts.append(f"            '\"{col}\":' || {expr}")
+
+    payload_expr = ",\n".join(json_parts)
+
+    sql = f"""DROP TABLE IF EXISTS _wf_{table_name}_updated;
+
+CREATE TABLE _wf_{table_name}_updated AS
+SELECT
+  {key_column},
+  payload
+FROM (
+  SELECT
+    {key_column},
+    '{{' || array_join(
+      ARRAY[
+{payload_expr}
+      ],
+      ','
+    ) || '}}' AS payload
+  FROM {database}.{table_name}
+) src
+WHERE NOT EXISTS (
+  SELECT 1
+  FROM _wf_{table_name}_digests dig
+  WHERE dig._key = src.{key_column}
+    AND dig.payload_xxhash64 = from_big_endian_64(xxhash64(to_utf8(src.payload)))
+)
+"""
+
+    digdag.env.store({"extract_sql": sql, "key_column": key_column})
+    return {"extract_sql": sql, "key_column": key_column}
diff --git a/realtime-box/lookup-catalog-sync/table-discovery/sync_table.dig b/realtime-box/lookup-catalog-sync/table-discovery/sync_table.dig
new file mode 100644
index 00000000..2afdb2b2
--- /dev/null
+++ b/realtime-box/lookup-catalog-sync/table-discovery/sync_table.dig
@@ -0,0 +1,78 @@
+# Reusable single-table sync logic.
+# Parameters:
+#   table_name: Name of the table to sync (set by the calling workflow)
+
++get_columns:
+  td>:
+  database: ${td.database}
+  store_last_results: true
+  query: |
+    SELECT
+      array_agg(column_name ORDER BY ordinal_position) AS columns,
+      array_agg(data_type ORDER BY ordinal_position) AS column_types
+    FROM information_schema.columns
+    WHERE table_schema = '${td.database}'
+      AND table_name = '${table_name}'
+
++generate_sql:
+  py>: scripts.generate_sql.generate_extract_sql
+  database: ${td.database}
+  table_name: ${table_name}
+  columns: ${td.last_results.columns}
+  column_types: ${td.last_results.column_types}
+  docker:
+    image: "digdag/digdag-python:3.10.1"
+
++extract_updated:
+  td>:
+  database: ${td.database}
+  query: ${extract_sql}
+
++count_updated:
+  td>:
+  database: ${td.database}
+  store_last_results: true
+  query: |
+    SELECT COUNT(*) AS row_count FROM _wf_${table_name}_updated
+
++upload_if_needed:
+  if>: ${td.last_results.row_count > 0}
+  _do:
+    +log_upload:
+      echo>: "Uploading ${td.last_results.row_count} changed records for ${table_name}"
+
+    +upload:
+      td>:
+      database: ${td.database}
+      query: |
+        SELECT ${key_column}, payload FROM _wf_${table_name}_updated
+      result_url: |
+        {
+          "type": "rest",
+          "method": "POST",
+          "authorization": "${secret:td.apikey}",
+          "endpoint": "${reactor_importer_endpoint}/internal/lookup-catalog/bulk-load",
+          "headers": "{\"x-reactor-instance-name\": \"${reactor_instance}\", \"x-lookup-table-name\": \"${table_name}\"}",
+          "parallelism": ${parallelism},
+          "page_size": ${batch_size}
+        }
+
+    +update_digests:
+      td>:
+      database: ${td.database}
+      query: |
+        INSERT INTO _wf_${table_name}_digests (_key, payload_xxhash64, time)
+        SELECT
+          ${key_column},
+          from_big_endian_64(xxhash64(to_utf8(payload))) AS payload_xxhash64,
+          CAST(to_unixtime(current_timestamp) AS bigint) AS time
+        FROM _wf_${table_name}_updated
+
+  _else_do:
+    +log_no_updates:
+      echo>: "No changes for ${table_name}"
+
++cleanup:
+  td_ddl>:
+    drop_tables:
+      - _wf_${table_name}_updated