diff --git a/constitution.py b/constitution.py
index f819007252f435680b8356fb4da83469b21e33af..4dd5b9dfbba231d46289c490f91b1dd5b1018bcf 100644
--- a/constitution.py
+++ b/constitution.py
@@ -119,6 +119,9 @@ JSONL_PATH = pathlib.Path(os.environ.get("JSONL_PATH", "/data/ledger.jsonl"))
 
 GITHUB_CLIENT_ID = os.environ.get("GITHUB_CLIENT_ID", "")
 GITHUB_CLIENT_SECRET = os.environ.get("GITHUB_CLIENT_SECRET", "")
+GITHUB_API_BASE_URL = os.environ.get(
+    "GITHUB_API_BASE_URL", "https://api.github.com"
+).rstrip("/")
 
 OPENROUTER_API_KEY = os.environ.get("OPENROUTER_API_KEY", "")
 OPENROUTER_BASE_URL = os.environ.get("OPENROUTER_BASE_URL", "https://openrouter.ai").rstrip("/")