docs: mark this fork deprecated in favor of mcp-meta-ads-incrementality (#4)

drak-stack-monorepo work should target mharnett/mcp-meta-ads-incrementality
going forward; this fork stays only until its two confirmed capability gaps
(image/video library listing, asset_customization_rules/placement-specific
creative in create_ad_creative) are closed there. Test-first: added a
README-content test asserting the notice, replacement repo name, and both
gaps are present before the title/TOC boundary.

Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com>

Author: mharnett

README.md

@@ -10,6 +10,15 @@ A [Model Context Protocol (MCP)](https://modelcontextprotocol.io/) server for in
 
 mcp-name: co.pipeboard/meta-ads-mcp
 
+> **⚠️ Deprecated (internal use):** For drak-stack-monorepo work, this fork is deprecated
+> in favor of [`mcp-meta-ads-incrementality`](https://github.com/mharnett/mcp-meta-ads-incrementality)
+> (`mharnett/mcp-meta-ads-incrementality`). New work should target that server; this fork
+> is retained only until confirmed capability gaps are closed there:
+>
+> - **Image/video library listing** — no equivalent to this repo's asset-library browsing tools.
+> - **Placement-specific creative** — no equivalent to `asset_customization_rules` /
+>   placement-specific creative support in `create_ad_creative`.
+
 ## Community & Support
 
 - [Discord](https://discord.gg/YzMwQ8zrjr). Join the community.

tests/test_readme_deprecation_notice.py

@@ -0,0 +1,43 @@
+"""README must carry a deprecation notice pointing at mcp-meta-ads-incrementality.
+
+This repo is being retired in favor of `mharnett/mcp-meta-ads-incrementality`
+(drak-stack-monorepo's internal replacement). Anyone opening this README
+should immediately see that it's deprecated, what replaces it, and the two
+confirmed capability gaps the replacement doesn't cover yet, rather than
+silently building against a retired server.
+"""
+import re
+from pathlib import Path
+
+README = (Path(__file__).parent.parent / "README.md").read_text()
+
+
+def _section_between_title_and_toc():
+    """The notice must sit after the title, before the Table of Contents heading."""
+    toc_match = re.search(r"^## Table of Contents", README, re.MULTILINE)
+    assert toc_match, "README has no '## Table of Contents' heading to anchor against"
+    return README[:toc_match.start()]
+
+
+def test_readme_has_deprecation_notice_before_toc():
+    section = _section_between_title_and_toc()
+    assert "deprecat" in section.lower(), (
+        "No deprecation notice found between the title and the Table of Contents"
+    )
+
+
+def test_deprecation_notice_names_the_replacement():
+    section = _section_between_title_and_toc()
+    assert "mcp-meta-ads-incrementality" in section
+    assert "mharnett/mcp-meta-ads-incrementality" in section
+
+
+def test_deprecation_notice_names_both_capability_gaps():
+    section = _section_between_title_and_toc()
+    lowered = section.lower()
+    assert "image" in lowered and "video" in lowered and "librar" in lowered, (
+        "Missing the image/video library listing capability gap"
+    )
+    assert "asset_customization_rules" in section, (
+        "Missing the asset_customization_rules / placement-specific creative gap"
+    )