release from main only

AI Prompts:
claude-sonnet-4-6: <ide_opened_file>The user opened the file ./release in the IDE. This may or may not be related to the current task.</ide_opened_file> make sure that ./release operated on main and push main before tagging

Author: niccokunzmann

release

@@ -32,6 +32,17 @@ def main() -> None:
     if version.startswith("v"):
         die(f"version must not start with 'v', got: {version!r}")
 
+    # ensure we're on main
+    branch = subprocess.run(
+        ["git", "rev-parse", "--abbrev-ref", "HEAD"],
+        capture_output=True,
+        text=True,
+        check=True,
+        cwd=ROOT,
+    ).stdout.strip()
+    if branch != "main":
+        die(f"must be on main branch, currently on: {branch!r}")
+
     print(f"releasing {version}")
 
     # pyproject.toml
@@ -73,6 +84,7 @@ def main() -> None:
         print("\nworking tree has changes — commit them, then re-run to tag and push")
     else:
         tag = f"v{version}"
+        subprocess.run(["git", "push", "origin", "main"], check=True, cwd=ROOT)
         subprocess.run(["git", "tag", "-a", tag, "-m", f"Release {tag}"], check=True, cwd=ROOT)
         print(f"  tagged {tag}")
         subprocess.run(["git", "push", "origin", tag], check=True, cwd=ROOT)