diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..d4aaec9
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,17 @@
+name: CI
+on: [push, pull_request]
+jobs:
+  test:
+    strategy:
+      matrix:
+        pg: [17, 16, 15, 14, 13, 12, 11, 10]
+    name: 🐘 PostgreSQL ${{ matrix.pg }}
+    runs-on: ubuntu-latest
+    container: pgxn/pgxn-tools
+    steps:
+      - name: Start PostgreSQL ${{ matrix.pg }}
+        run: pg-start ${{ matrix.pg }}
+      - name: Check out the repo
+        uses: actions/checkout@v4
+      - name: Test on PostgreSQL ${{ matrix.pg }}
+        run: pg-build-test
diff --git a/META.in.json b/META.in.json
index 6bfa55c..c730255 100644
--- a/META.in.json
+++ b/META.in.json
@@ -16,7 +16,7 @@
     "name": "count_nulls",
 
     "X_comment": "REQUIRED. Version of the distribution. http://pgxn.org/spec/#version",
-    "version": "0.9.7",
+    "version": "1.0.0",
 
     "X_comment": "REQUIRED. Short description of distribution.",
     "abstract": "Count the number of null arguments",
@@ -43,7 +43,7 @@
             "file": "sql/count_nulls.sql",
 
             "X_comment": "REQUIRED. Version the extension is at.",
-            "version": "0.9.6",
+            "version": "1.0.0",
 
             "X_comment": "Optional: \"abstract\": Description of the extension.",
             "abstract": "Count the number of null arguments",
diff --git a/META.json b/META.json
index 4bfc36b..19c84e1 100644
--- a/META.json
+++ b/META.json
@@ -16,7 +16,7 @@
     "name": "count_nulls",
 
     "X_comment": "REQUIRED. Version of the distribution. http://pgxn.org/spec/#version",
-    "version": "0.9.7",
+    "version": "1.0.0",
 
     "X_comment": "REQUIRED. Short description of distribution.",
     "abstract": "Count the number of null arguments",
@@ -43,7 +43,7 @@
             "file": "sql/count_nulls.sql",
 
             "X_comment": "REQUIRED. Version the extension is at.",
-            "version": "0.9.6",
+            "version": "1.0.0",
 
             "X_comment": "Optional: \"abstract\": Description of the extension.",
             "abstract": "Count the number of null arguments",
diff --git a/count_nulls.control b/count_nulls.control
index 14eaa22..c5c5c28 100644
--- a/count_nulls.control
+++ b/count_nulls.control
@@ -1,4 +1,4 @@
 # count_nulls extension
 comment = 'Count the number of null arguments'
-default_version = '0.9.6'
+default_version = '1.0.0'
 relocatable = false
diff --git a/sql/count_nulls--0.9.6--1.0.0.sql b/sql/count_nulls--0.9.6--1.0.0.sql
new file mode 100644
index 0000000..dc73d7b
--- /dev/null
+++ b/sql/count_nulls--0.9.6--1.0.0.sql
@@ -0,0 +1 @@
+-- No actual SQL changes to this version bump
diff --git a/sql/count_nulls--1.0.0.sql b/sql/count_nulls--1.0.0.sql
new file mode 100644
index 0000000..b6dc949
--- /dev/null
+++ b/sql/count_nulls--1.0.0.sql
@@ -0,0 +1,89 @@
+/* DO NOT EDIT - AUTO-GENERATED FILE */
+SET client_min_messages = WARNING;
+
+CREATE OR REPLACE FUNCTION null_count(
+  VARIADIC argument anyarray
+) RETURNS int LANGUAGE sql IMMUTABLE AS $body$
+  SELECT sum( CASE WHEN a IS NULL THEN 1 ELSE 0 END )::int
+    FROM unnest( $1 ) a
+$body$;
+
+CREATE OR REPLACE FUNCTION null_count(
+  argument jsonb
+) RETURNS int LANGUAGE sql IMMUTABLE AS $body$
+SELECT count(*)::int
+  FROM jsonb_each_text( $1 ) a
+  WHERE value IS NULL
+$body$;
+CREATE OR REPLACE FUNCTION null_count(
+  argument json
+) RETURNS int LANGUAGE sql IMMUTABLE AS 'SELECT @extschema@.null_count($1::jsonb)';
+
+CREATE OR REPLACE FUNCTION null_count_trigger(
+) RETURNS trigger LANGUAGE plpgsql IMMUTABLE AS $body$
+DECLARE
+  c_msg CONSTANT text := coalesce(
+    nullif( TG_ARGV[1], 'null' )
+    , format( '%s must contain %s NULL fields', TG_RELID::regclass, TG_ARGV[0] )
+  );
+BEGIN
+  IF TG_NARGS NOT BETWEEN 1 AND 2 THEN
+    RAISE '% usage: number of NULL columns[, error message]', TG_NAME;
+  END IF;
+  -- Casing intentional for cut/paste/replace/
+  IF nullif(TG_ARGV[0], 'null') IS null THEN
+    RAISE '%: first argument must not be null', TG_NAME;
+  END IF;
+
+  IF @extschema@.null_count( row_to_json(NEW) ) <> TG_ARGV[0]::int THEN
+    RAISE '%', c_msg;
+  END IF;
+
+  RETURN NEW;
+END
+$body$;
+
+
+CREATE OR REPLACE FUNCTION not_null_count(
+  VARIADIC argument anyarray
+) RETURNS int LANGUAGE sql IMMUTABLE AS $body$
+  SELECT sum( CASE WHEN a IS NOT NULL THEN 1 ELSE 0 END )::int
+    FROM unnest( $1 ) a
+$body$;
+
+CREATE OR REPLACE FUNCTION not_null_count(
+  argument jsonb
+) RETURNS int LANGUAGE sql IMMUTABLE AS $body$
+SELECT count(*)::int
+  FROM jsonb_each_text( $1 ) a
+  WHERE value IS NOT NULL
+$body$;
+CREATE OR REPLACE FUNCTION not_null_count(
+  argument json
+) RETURNS int LANGUAGE sql IMMUTABLE AS 'SELECT @extschema@.not_null_count($1::jsonb)';
+
+CREATE OR REPLACE FUNCTION not_null_count_trigger(
+) RETURNS trigger LANGUAGE plpgsql IMMUTABLE AS $body$
+DECLARE
+  c_msg CONSTANT text := coalesce(
+    nullif( TG_ARGV[1], 'null' )
+    , format( '%s must contain %s NOT NULL fields', TG_RELID::regclass, TG_ARGV[0] )
+  );
+BEGIN
+  IF TG_NARGS NOT BETWEEN 1 AND 2 THEN
+    RAISE '% usage: number of NOT NULL columns[, error message]', TG_NAME;
+  END IF;
+  -- Casing intentional for cut/paste/replace/
+  IF nullif(TG_ARGV[0], 'null') IS null THEN
+    RAISE '%: first argument must not be null', TG_NAME;
+  END IF;
+
+  IF @extschema@.not_null_count( row_to_json(NEW) ) <> TG_ARGV[0]::int THEN
+    RAISE '%', c_msg;
+  END IF;
+
+  RETURN NEW;
+END
+$body$;
+
+-- vi: expandtab sw=2 ts=2