diff --git a/PostgreSQL/build_rdbms_01/Readme.md b/PostgreSQL/build_rdbms_01/Readme.md
index 3fec5e1..815eb26 100644
--- a/PostgreSQL/build_rdbms_01/Readme.md
+++ b/PostgreSQL/build_rdbms_01/Readme.md
@@ -48,6 +48,7 @@ The orchestrator runs the installers in this order:
 11. pgvector
 12. HypoPG
 13. pg_hint_plan
+14. wal2json
 
 After a successful run, the orchestrator:
 
@@ -76,6 +77,7 @@ Each component can also be installed independently. The PostgreSQL installation
 ./install_pgvector.sh --version 18.6
 ./install_hypopg.sh --version 18.6
 ./install_pg_hint_plan.sh --version 18.6
+./install_wal2json.sh --version 18.6
 ```
 
 Each installer also accepts `-v 18.6` and the previous positional form (`./install_pg_cron.sh 18.6`). The all-in-one orchestrator passes its complete `--version` value to every component installer.
@@ -169,6 +171,10 @@ Builds and installs HypoPG against the selected PostgreSQL installation. Create
 
 Builds and installs the pg_hint_plan tag matching the PostgreSQL major version when available. Create it in each database where it will be used with `CREATE EXTENSION pg_hint_plan`.
 
+### `install_wal2json.sh`
+
+Builds and installs wal2json as a PostgreSQL logical decoding output plugin. It does not use `CREATE EXTENSION` or require `shared_preload_libraries`; configure PostgreSQL with `wal_level = logical` and restart the server before creating a logical replication slot that uses the `wal2json` plugin.
+
 ### `install_common.sh`
 
 Shared helper functions used by the installers, including:
@@ -201,6 +207,7 @@ The following environment variables can override defaults:
 | `PGVECTOR_TAG` | Latest release/tag | pgvector source tag |
 | `HYPOPG_TAG` | Latest release/tag | HypoPG source tag |
 | `PG_HINT_PLAN_TAG` | PostgreSQL-major-compatible tag | pg_hint_plan source tag |
+| `WAL2JSON_TAG` | Latest release/tag | wal2json source tag |
 
 Repository variables can also be overridden when using a custom mirror:
 
@@ -214,6 +221,7 @@ PG_STAT_MONITOR_REPOSITORY=owner/repository
 PGVECTOR_REPOSITORY=owner/repository
 HYPOPG_REPOSITORY=owner/repository
 PG_HINT_PLAN_REPOSITORY=owner/repository
+WAL2JSON_REPOSITORY=owner/repository
 ```
 
 Example:
@@ -233,7 +241,7 @@ When `CONFIG_FILE` is supplied, the orchestrator adds the modules and extensions
 shared_preload_libraries = 'pg_cron,timescaledb,pgaudit,pg_stat_statements,pg_stat_monitor,passwordcheck'
 ```
 
-`pg_repack`, pgvector, HypoPG, and `set_user` do not require `shared_preload_libraries`. `auto_explain` and pg_hint_plan can be loaded per session or configured for server startup; they are not added automatically. `passwordcheck` and `auto_explain` are PostgreSQL contrib modules (not SQL extensions), and `pg_stat_activity` is a built-in PostgreSQL system view.
+`pg_repack`, pgvector, HypoPG, `set_user`, and wal2json do not require `shared_preload_libraries`. `auto_explain` and pg_hint_plan can be loaded per session or configured for server startup; they are not added automatically. wal2json is a logical decoding output plugin and requires `wal_level = logical` plus a server restart before use. `passwordcheck` and `auto_explain` are PostgreSQL contrib modules (not SQL extensions), and `pg_stat_activity` is a built-in PostgreSQL system view.
 
 ## Prerequisites
 
@@ -276,7 +284,8 @@ ls \
   /app/postgres/rdbms/18.6/lib/pg_stat_monitor.so \
   /app/postgres/rdbms/18.6/lib/auto_explain.so \
   /app/postgres/rdbms/18.6/lib/hypopg.so \
-  /app/postgres/rdbms/18.6/lib/pg_hint_plan.so
+  /app/postgres/rdbms/18.6/lib/pg_hint_plan.so \
+  /app/postgres/rdbms/18.6/lib/wal2json.so
 ```
 
 The extension SQL objects still need to be created in each target database with PostgreSQL's `CREATE EXTENSION` command.
diff --git a/PostgreSQL/build_rdbms_01/install_postgresql_extensions.sh b/PostgreSQL/build_rdbms_01/install_postgresql_extensions.sh
index 5aae6d2..a2067d2 100644
--- a/PostgreSQL/build_rdbms_01/install_postgresql_extensions.sh
+++ b/PostgreSQL/build_rdbms_01/install_postgresql_extensions.sh
@@ -159,6 +159,7 @@ mkdir -p "$SOURCES_DIR"
 "$SCRIPT_DIR/install_pgvector.sh" --version "$POSTGRES_VERSION"
 "$SCRIPT_DIR/install_hypopg.sh" --version "$POSTGRES_VERSION"
 "$SCRIPT_DIR/install_pg_hint_plan.sh" --version "$POSTGRES_VERSION"
+"$SCRIPT_DIR/install_wal2json.sh" --version "$POSTGRES_VERSION"
 
 readonly CONFIG_FILE="${CONFIG_FILE:-}"
 readonly SHARED_PRELOAD_LIBRARIES="pg_cron,timescaledb,pgaudit,pg_stat_statements,pg_stat_monitor,passwordcheck"
@@ -217,6 +218,7 @@ printf '  pg_stat_monitor: %s\n' "$(extension_version pg_stat_monitor)"
 printf '  pgvector: %s\n' "$(extension_version vector)"
 printf '  hypopg: %s\n' "$(extension_version hypopg)"
 printf '  pg_hint_plan: %s\n' "$(extension_version pg_hint_plan)"
+printf '  wal2json: logical decoding output plugin\n'
 printf "  shared_preload_libraries = '%s'\n" "$SHARED_PRELOAD_LIBRARIES"
 
 rm -f -- "$ENGINE_ARCHIVE"
diff --git a/PostgreSQL/build_rdbms_01/install_wal2json.sh b/PostgreSQL/build_rdbms_01/install_wal2json.sh
new file mode 100644
index 0000000..6eb0fba
--- /dev/null
+++ b/PostgreSQL/build_rdbms_01/install_wal2json.sh
@@ -0,0 +1,50 @@
+#!/usr/bin/env bash
+
+set -Eeuo pipefail
+
+SCRIPT_DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
+# shellcheck source=install_common.sh
+source "$SCRIPT_DIR/install_common.sh"
+
+readonly STAGING_DIR="${STAGING_DIR:-$SCRIPT_DIR/tmp}"
+readonly POSTGRES_ROOT="${POSTGRES_ROOT:-/app/postgres/rdbms}"
+readonly WAL2JSON_REPOSITORY="${WAL2JSON_REPOSITORY:-eulerto/wal2json}"
+
+if [[ "${1:-}" == "--help" || "${1:-}" == "-h" ]]; then
+  show_help "$0" "Build and install wal2json for an existing PostgreSQL installation."
+  exit 0
+fi
+
+POSTGRES_VERSION="$(parse_postgresql_version "$@")"
+readonly POSTGRES_VERSION
+require_tools curl tar make
+readonly PREFIX="${PREFIX:-$POSTGRES_ROOT/$POSTGRES_VERSION}"
+readonly PG_CONFIG="$PREFIX/bin/pg_config"
+require_postgresql_installation "$PREFIX"
+reset_staging_dir "$STAGING_DIR"
+
+readonly WAL2JSON_TAG="${WAL2JSON_TAG:-$(latest_tag "$WAL2JSON_REPOSITORY")}"
+[[ -n "$WAL2JSON_TAG" ]] || die "could not determine the latest wal2json release"
+readonly WAL2JSON_DIR="$STAGING_DIR/wal2json-$WAL2JSON_TAG"
+
+printf 'Building wal2json %s\n' "$WAL2JSON_TAG"
+download_source "$STAGING_DIR" "$WAL2JSON_REPOSITORY" "$WAL2JSON_TAG" \
+  "wal2json-$WAL2JSON_TAG.tar.gz" "$WAL2JSON_DIR"
+cd "$WAL2JSON_DIR"
+make -j"${JOBS:-$(nproc)}" USE_PGXS=1 PG_CONFIG="$PG_CONFIG"
+make install USE_PGXS=1 PG_CONFIG="$PG_CONFIG"
+test -f "$PREFIX/lib/wal2json.so"
+
+readonly SAVED_SOURCE_DIR="$(copy_install_source "$WAL2JSON_DIR" "$PREFIX" "wal2json-$WAL2JSON_TAG")"
+write_install_recipe "$SAVED_SOURCE_DIR" "$POSTGRES_VERSION" "$PREFIX" <<'RECIPE'
+cd "$SCRIPT_DIR"
+
+# Configure
+# wal2json uses PGXS directly and does not require a separate configure step.
+
+# Make
+make -j"$JOBS" USE_PGXS=1 PG_CONFIG="$PG_CONFIG"
+
+# Make install
+make install USE_PGXS=1 PG_CONFIG="$PG_CONFIG"
+RECIPE
diff --git a/PostgreSQL/build_rdbms_01/wrapper.sh b/PostgreSQL/build_rdbms_01/wrapper.sh
index 110a7b0..6b9b72f 100644
--- a/PostgreSQL/build_rdbms_01/wrapper.sh
+++ b/PostgreSQL/build_rdbms_01/wrapper.sh
@@ -1,5 +1,5 @@
 ./install_postgresql_extensions.sh \
-	--version 17.11 \
-	--prefix /app/staging_area/postgres/rdbms/17.11 \
-	--options="--with-ssl=openssl,--with-ls4"
+	--version 18.6 \
+	--prefix /app/staging_area/postgres/rdbms/18.6 \
+	--options="--with-ssl=openssl,--with-lz4"
 
diff --git a/divers/vminfo.txt b/divers/vminfo.txt
index 11dba69..1e887ab 100644
--- a/divers/vminfo.txt
+++ b/divers/vminfo.txt
@@ -6,7 +6,9 @@ exegol          OEL9 - ogg21
 helska          OEL9 - ogg21
 
 # raxus           PostgreSQL
-belasco         PostgreSQL
+# belasco         PostgreSQL
+
+mobus		Rocky Linux 9, for Copilot
 
 jakku     	Windows 7 - Ciel Compta 
 utapau    	Windows 11 (vplesnila/secret)