better unpushed_commits detection

workspaces.py

@@ -644,30 +644,39 @@ def find_repo_for_worktree(
 
 def has_unpushed_commits(repo_path: Path, branch: str) -> bool:
     """
-    Detect if branch has commits not on its upstream.
-    Uses 'git rev-list @{u}..HEAD'; if non-empty, there are unpushed commits.
+    Detect if `branch` has commits not on its upstream.
+
+    If no upstream is configured, we *do not* treat that as "unpushed" anymore,
+    just "can't check", and return False (so rm won't block on it).
     """
-    # Check if upstream exists
-    code, _, _ = run_cmd(
+    # Find upstream ref, e.g. origin/branch
+    code, out, _ = run_cmd(
         ["git", "rev-parse", "--abbrev-ref", "--symbolic-full-name", "@{u}"],
         cwd=repo_path,
     )
     if code != 0:
-        # No upstream configured; treat as unpushed work.
-        return True
+        # No upstream configured; assume "not able to check", *not* a blocker.
+        return False
 
+    upstream = out.strip()
+    if not upstream or upstream == "@{u}":
+        return False
+
+    # Number of commits on HEAD that are not in upstream
     code, out, _ = run_cmd(
-        ["git", "rev-list", "@{u}..HEAD", "--count"],
+        ["git", "rev-list", "--count", f"{upstream}..{branch}"],
         cwd=repo_path,
     )
     if code != 0:
-        return True
+        # If we can't check, don't block
+        return False
+
     try:
         count = int(out.strip() or "0")
     except ValueError:
-        return True
-    return count > 0
+        return False
 
+    return count > 0
 
 def is_branch_integrated_into_main(
     repo_path: Path,