diff --git a/.claude/settings.json b/.claude/settings.json
new file mode 100644
index 0000000..245d950
--- /dev/null
+++ b/.claude/settings.json
@@ -0,0 +1,8 @@
+{
+  "permissions": {
+    "additionalDirectories": [
+      "../pgxntool/",
+      "../pgxntool-test/"
+    ]
+  }
+}
diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..e976821
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,3 @@
+.gitattributes export-ignore
+.claude/ export-ignore
+.DS_Store export-ignore
diff --git a/CLAUDE.md b/CLAUDE.md
new file mode 100644
index 0000000..a77a726
--- /dev/null
+++ b/CLAUDE.md
@@ -0,0 +1,27 @@
+# CLAUDE.md
+
+## Repository Status: DEPRECATED
+
+**This repository is deprecated and no longer used.** It is kept only to preserve its commit history.
+
+## What Happened
+
+The template extension files that used to live in this repository have been moved to `../pgxntool-test/template/`. The test harness now creates fresh test repositories directly from that template directory, eliminating the need for a separate template repository.
+
+## Migration
+
+If you need the template files, they are now located at:
+- **../pgxntool-test/template/**
+
+The test harness (`../pgxntool-test/`) contains all testing infrastructure and template files in a single repository.
+
+## Two-Repository Pattern
+
+The pgxntool project now uses a simpler two-repository pattern:
+
+1. **../pgxntool/** - The framework code that gets embedded into extension projects
+2. **../pgxntool-test/** - The test harness (includes template files in `template/` directory)
+
+## Historical Context
+
+This repository previously served as a minimal "dummy" PostgreSQL extension used as a test subject. Tests would clone this repository and manipulate it to validate pgxntool's functionality. This approach has been replaced with a simpler method of creating fresh test repositories from template files stored directly in the test harness.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..9f89aef
--- /dev/null
+++ b/README.md
@@ -0,0 +1,35 @@
+# pgxntool-test-template
+
+## ⚠️ DEPRECATED REPOSITORY
+
+**This repository is no longer used and exists only to preserve its commit history.**
+
+## What Happened
+
+The template extension files that used to live here have been moved to:
+- **[pgxntool-test/template/](https://github.com/decibel/pgxntool-test/tree/master/template)**
+
+The test harness now creates fresh test repositories directly from that template directory, eliminating the need for a separate template repository.
+
+## Current Architecture
+
+The pgxntool project now uses a two-repository pattern:
+
+1. **[pgxntool](https://github.com/decibel/pgxntool)** - The framework code
+2. **[pgxntool-test](https://github.com/decibel/pgxntool-test)** - The test harness with template files
+
+## Migration Guide
+
+If you were using this repository:
+- Template files are now in `pgxntool-test/template/`
+- Tests create repositories directly from those template files
+- No changes needed to existing workflows using `pgxntool-test`
+
+## Historical Context
+
+This repository served as a minimal PostgreSQL extension that was cloned and manipulated during testing. The approach has been simplified to use template files stored directly in the test harness repository.
+
+---
+
+**Repository archived on:** 2026-01-08
+**Reason:** Consolidated into pgxntool-test repository
diff --git a/pgxntool-test.control b/pgxntool-test.control
deleted file mode 100644
index 35142c0..0000000
--- a/pgxntool-test.control
+++ /dev/null
@@ -1 +0,0 @@
-default_version = '0.1.0'
diff --git a/t/.gitignore b/t/.gitignore
deleted file mode 100644
index 2f5184c..0000000
--- a/t/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-.*.swp
-.DS_Store
diff --git a/t/TEST_DOC.asc b/t/TEST_DOC.asc
deleted file mode 100644
index 9a01daf..0000000
--- a/t/TEST_DOC.asc
+++ /dev/null
@@ -1 +0,0 @@
-This is just a test file.
diff --git a/t/doc/adoc_doc.adoc b/t/doc/adoc_doc.adoc
deleted file mode 100644
index e69de29..0000000
diff --git a/t/doc/asc_doc.asc b/t/doc/asc_doc.asc
deleted file mode 100644
index e69de29..0000000
diff --git a/t/doc/asciidoc_doc.asciidoc b/t/doc/asciidoc_doc.asciidoc
deleted file mode 100644
index e69de29..0000000
diff --git a/t/doc/other.html b/t/doc/other.html
deleted file mode 100644
index e69de29..0000000
diff --git a/t/sql/pgxntool-test--0.1.0--0.1.1.sql b/t/sql/pgxntool-test--0.1.0--0.1.1.sql
deleted file mode 100644
index e69de29..0000000
diff --git a/t/sql/pgxntool-test.sql b/t/sql/pgxntool-test.sql
deleted file mode 100644
index 3cea3d8..0000000
--- a/t/sql/pgxntool-test.sql
+++ /dev/null
@@ -1,8 +0,0 @@
-CREATE FUNCTION "pgxntool-test"(
-  a int
-  , b int
-) RETURNS int LANGUAGE sql IMMUTABLE AS $body$
-SELECT $1 + $2 -- 9.1 doesn't support named sql language parameters
-$body$;
-
--- vi: expandtab ts=2 sw=2
diff --git a/t/test/input/pgxntool-test.source b/t/test/input/pgxntool-test.source
deleted file mode 100644
index d076ebd..0000000
--- a/t/test/input/pgxntool-test.source
+++ /dev/null
@@ -1,12 +0,0 @@
-\i @abs_srcdir@/pgxntool/setup.sql
-
-SELECT plan(1);
-
-SELECT is(
-  "pgxntool-test"(1,2)
-  , 3
-);
-
-\i @abs_srcdir@/pgxntool/finish.sql
-
--- vi: expandtab ts=2 sw=2