diff --git a/llvm/utils/llvm_push_pr.py b/llvm/utils/llvm_push_pr.py
new file mode 100644
index 0000000000000..bb1cf7e7fb6fa
--- /dev/null
+++ b/llvm/utils/llvm_push_pr.py
@@ -0,0 +1,696 @@
+#!/usr/bin/env python3
+"""A script to automate the creation and landing of a stack of Pull Requests."""
+
+import argparse
+import json
+import os
+import re
+import subprocess
+import sys
+import time
+import urllib.error
+import urllib.request
+
+from typing import List, Optional
+from http.client import HTTPResponse
+from dataclasses import dataclass
+
+# --- Constants --- #
+BASE_BRANCH = "main"
+GITHUB_REMOTE_NAME = "origin"
+UPSTREAM_REMOTE_NAME = "upstream"
+
+LLVM_GITHUB_TOKEN_VAR = "LLVM_GITHUB_TOKEN"
+LLVM_REPO = "llvm/llvm-project"
+GITHUB_API = "https://api.github.com"
+
+MERGE_MAX_RETRIES = 10
+MERGE_RETRY_DELAY = 5  # seconds
+REQUEST_TIMEOUT = 30  # seconds
+
+
+class LlvmPrError(Exception):
+    """Custom exception for errors in the PR automator script."""
+
+
+@dataclass
+class PRAutomatorConfig:
+    """Configuration Data."""
+
+    user_login: str
+    token: str
+    base_branch: str
+    upstream_remote: str
+    prefix: str
+    draft: bool
+    no_merge: bool
+    auto_merge: bool
+
+
+class CommandRunner:
+    """Handles command execution and output.
+    Supports dry runs and verbosity level."""
+
+    def __init__(
+        self, dry_run: bool = False, verbose: bool = False, quiet: bool = False
+    ):
+        self.dry_run = dry_run
+        self.verbose = verbose
+        self.quiet = quiet
+
+    def print(self, message: str, file=sys.stdout) -> None:
+        if self.quiet and file == sys.stdout:
+            return
+        print(message, file=file)
+
+    def verbose_print(self, message: str, file=sys.stdout) -> None:
+        if self.verbose:
+            print(message, file)
+
+    def run_command(
+        self,
+        command: List[str],
+        check: bool = True,
+        capture_output: bool = False,
+        text: bool = False,
+        stdin_input: Optional[str] = None,
+        read_only: bool = False,
+        env: Optional[dict] = None,
+    ) -> subprocess.CompletedProcess:
+        if self.dry_run and not read_only:
+            self.print(f"[Dry Run] Would run: {' '.join(command)}")
+            return subprocess.CompletedProcess(command, 0, "", "")
+
+        self.verbose_print(f"Running: {' '.join(command)}")
+
+        try:
+            return subprocess.run(
+                command,
+                check=check,
+                capture_output=capture_output,
+                text=text,
+                input=stdin_input,
+                env=env,
+            )
+        except FileNotFoundError as e:
+            raise LlvmPrError(
+                f"Command '{command[0]}' not found. Is it installed and in your PATH?"
+            ) from e
+        except subprocess.CalledProcessError as e:
+            self.print(f"Error running command: {' '.join(command)}", file=sys.stderr)
+            if e.stdout:
+                self.print(f"--- stdout ---\n{e.stdout}", file=sys.stderr)
+            if e.stderr:
+                self.print(f"--- stderr ---\n{e.stderr}", file=sys.stderr)
+            raise e
+
+
+class GitHubAPI:
+    """A wrapper for the GitHub API."""
+
+    def __init__(self, runner: CommandRunner, token: str):
+        self.runner = runner
+        self.headers = {
+            "Authorization": f"token {token}",
+            "Accept": "application/vnd.github.v3+json",
+            "User-Agent": "llvm-push-pr",
+        }
+        self.opener = urllib.request.build_opener(
+            urllib.request.HTTPHandler(), urllib.request.HTTPSHandler()
+        )
+
+    def _request(
+        self, method: str, endpoint: str, json_payload: Optional[dict] = None
+    ) -> HTTPResponse:
+        url = f"{GITHUB_API}{endpoint}"
+        self.runner.verbose_print(f"API Request: {method.upper()} {url}")
+        if json_payload:
+            self.runner.verbose_print(f"Payload: {json_payload}")
+
+        data = None
+        headers = self.headers.copy()
+        if json_payload:
+            data = json.dumps(json_payload).encode("utf-8")
+            headers["Content-Type"] = "application/json"
+
+        req = urllib.request.Request(
+            url, data=data, headers=headers, method=method.upper()
+        )
+
+        try:
+            return self.opener.open(req, timeout=REQUEST_TIMEOUT)
+        except urllib.error.HTTPError as e:
+            self.runner.print(
+                f"Error making API request to {url}: {e}", file=sys.stderr
+            )
+            self.runner.verbose_print(
+                f"Error response body: {e.read().decode()}", file=sys.stderr
+            )
+            raise e
+
+    def _request_and_parse_json(
+        self, method: str, endpoint: str, json_payload: Optional[dict] = None
+    ) -> dict:
+        with self._request(method, endpoint, json_payload) as response:
+            # Expect a 200 'OK' or 201 'Created' status on success and JSON body.
+            self._log_unexpected_status([200, 201], response.status)
+
+            response_text = response.read().decode("utf-8")
+            if response_text:
+                return json.loads(response_text)
+            return {}
+
+    def _request_no_content(
+        self, method: str, endpoint: str, json_payload: Optional[dict] = None
+    ) -> None:
+        with self._request(method, endpoint, json_payload) as response:
+            # Expected a 204 No Content status on success, indicating the
+            # operation was successful but there is no body.
+            self._log_unexpected_status([204], response.status)
+
+    def _log_unexpected_status(
+        self, expected_statuses: List[int], actual_status: int
+    ) -> None:
+        if actual_status not in expected_statuses:
+            self.runner.print(
+                f"Warning: Expected status {', '.join(map(str, expected_statuses))}, but got {actual_status}",
+                file=sys.stderr,
+            )
+
+    def get_user_login(self) -> str:
+        return self._request_and_parse_json("GET", "/user")["login"]
+
+    def create_pr(
+        self,
+        head_branch: str,
+        base_branch: str,
+        title: str,
+        body: str,
+        draft: bool,
+    ) -> Optional[str]:
+        self.runner.print(f"Creating pull request for '{head_branch}'...")
+        data = {
+            "title": title,
+            "body": body,
+            "head": head_branch,
+            "base": base_branch,
+            "draft": draft,
+        }
+        response_data = self._request_and_parse_json(
+            "POST", f"/repos/{LLVM_REPO}/pulls", json_payload=data
+        )
+        pr_url = response_data.get("html_url")
+        if not self.runner.dry_run:
+            self.runner.print(f"Pull request created: {pr_url}")
+        return pr_url
+
+    def get_repo_settings(self) -> dict:
+        return self._request_and_parse_json("GET", f"/repos/{LLVM_REPO}")
+
+    def _get_pr_details(self, pr_number: str) -> dict:
+        """Fetches the JSON details for a given pull request number."""
+        return self._request_and_parse_json(
+            "GET", f"/repos/{LLVM_REPO}/pulls/{pr_number}"
+        )
+
+    def _attempt_squash_merge(self, pr_number: str) -> bool:
+        """Attempts to squash merge a PR, returning True on success."""
+        try:
+            self._request_and_parse_json(
+                "PUT",
+                f"/repos/{LLVM_REPO}/pulls/{pr_number}/merge",
+                json_payload={"merge_method": "squash"},
+            )
+            return True
+        except urllib.error.HTTPError as e:
+            # A 405 status code means the PR is not in a mergeable state.
+            if e.code == 405:
+                return False
+            # Re-raise other HTTP errors.
+            raise e
+
+    def merge_pr(self, pr_url: str) -> Optional[str]:
+        if not pr_url:
+            return None
+
+        if self.runner.dry_run:
+            self.runner.print(f"[Dry Run] Would merge {pr_url}")
+            return None
+
+        pr_number_match = re.search(r"/pull/(\d+)", pr_url)
+        if not pr_number_match:
+            raise LlvmPrError(f"Could not extract PR number from URL: {pr_url}")
+        pr_number = pr_number_match.group(1)
+
+        for i in range(MERGE_MAX_RETRIES):
+            self.runner.print(
+                f"Attempting to merge {pr_url} (attempt {i + 1}/{MERGE_MAX_RETRIES})..."
+            )
+
+            pr_data = self._get_pr_details(pr_number)
+            head_branch = pr_data["head"]["ref"]
+
+            if pr_data.get("mergeable_state") == "dirty":
+                raise LlvmPrError("Merge conflict.")
+
+            if pr_data.get("mergeable"):
+                if self._attempt_squash_merge(pr_number):
+                    self.runner.print("Successfully merged.")
+                    time.sleep(2)  # Allow GitHub's API to update.
+                    return head_branch
+
+            self.runner.print(
+                f"PR not mergeable yet (state: {pr_data.get('mergeable_state', 'unknown')}). Retrying in {MERGE_RETRY_DELAY} seconds..."
+            )
+            time.sleep(MERGE_RETRY_DELAY)
+
+        raise LlvmPrError(f"PR was not mergeable after {MERGE_MAX_RETRIES} attempts.")
+
+    def enable_auto_merge(self, pr_url: str) -> None:
+        if not pr_url:
+            return
+
+        if self.runner.dry_run:
+            self.runner.print(f"[Dry Run] Would enable auto-merge for {pr_url}")
+            return
+
+        pr_number_match = re.search(r"/pull/(\d+)", pr_url)
+        if not pr_number_match:
+            raise LlvmPrError(f"Could not extract PR number from URL: {pr_url}")
+        pr_number = pr_number_match.group(1)
+
+        self.runner.print(f"Enabling auto-merge for {pr_url}...")
+        data = {
+            "enabled": True,
+            "merge_method": "squash",
+        }
+        self._request_no_content(
+            "PUT",
+            f"/repos/{LLVM_REPO}/pulls/{pr_number}/auto-merge",
+            json_payload=data,
+        )
+        self.runner.print("Auto-merge enabled.")
+
+    def delete_branch(
+        self, branch_name: str, default_branch: Optional[str] = None
+    ) -> None:
+        if default_branch and branch_name == default_branch:
+            self.runner.print(
+                f"Error: Refusing to delete the default branch '{branch_name}'.",
+                file=sys.stderr,
+            )
+            return
+        try:
+            self._request_no_content(
+                "DELETE", f"/repos/{LLVM_REPO}/git/refs/heads/{branch_name}"
+            )
+        except urllib.error.HTTPError as e:
+            if e.code == 422:
+                self.runner.print(
+                    f"Warning: Remote branch '{branch_name}' was already deleted, skipping deletion.",
+                    file=sys.stderr,
+                )
+            else:
+                raise e
+
+
+class LLVMPRAutomator:
+    """Automates the process of creating and landing a stack of GitHub Pull Requests."""
+
+    def __init__(
+        self,
+        runner: CommandRunner,
+        github_api: "GitHubAPI",
+        config: "PRAutomatorConfig",
+        remote: str,
+    ):
+        self.runner = runner
+        self.github_api = github_api
+        self.config = config
+        self.remote = remote
+        self.original_branch: str = ""
+        self.created_branches: List[str] = []
+        self.repo_settings: dict = {}
+        self._git_askpass_cmd = (
+            f"python3 -c \"import os; print(os.environ['{LLVM_GITHUB_TOKEN_VAR}'])\""
+        )
+
+    def _get_git_env(self) -> dict:
+        git_env = os.environ.copy()
+        git_env["GIT_ASKPASS"] = self._git_askpass_cmd
+        git_env[LLVM_GITHUB_TOKEN_VAR] = self.config.token
+        git_env["GIT_TERMINAL_PROMPT"] = "0"
+        return git_env
+
+    def _run_cmd(
+        self, command: List[str], read_only: bool = False, **kwargs
+    ) -> subprocess.CompletedProcess:
+        return self.runner.run_command(command, read_only=read_only, **kwargs)
+
+    def _get_current_branch(self) -> str:
+        result = self._run_cmd(
+            ["git", "rev-parse", "--abbrev-ref", "HEAD"],
+            capture_output=True,
+            text=True,
+            read_only=True,
+        )
+        return result.stdout.strip()
+
+    def _check_work_tree(self) -> None:
+        result = self._run_cmd(
+            ["git", "status", "--porcelain"],
+            capture_output=True,
+            text=True,
+            read_only=True,
+        )
+        if result.stdout.strip():
+            raise LlvmPrError(
+                "Your working tree is dirty. Please stash or commit your changes."
+            )
+
+    def _rebase_current_branch(self) -> None:
+        self._check_work_tree()
+
+        target = f"{self.config.upstream_remote}/{self.config.base_branch}"
+        self.runner.print(
+            f"Fetching from '{self.config.upstream_remote}' and rebasing '{self.original_branch}' on top of '{target}'..."
+        )
+
+        git_env = self._get_git_env()
+
+        https_upstream_url = self._get_https_url_for_remote(self.config.upstream_remote)
+        refspec = f"refs/heads/{self.config.base_branch}:refs/remotes/{self.config.upstream_remote}/{self.config.base_branch}"
+        self._run_cmd(["git", "fetch", https_upstream_url, refspec], env=git_env)
+
+        try:
+            self._run_cmd(["git", "rebase", target], env=git_env)
+        except subprocess.CalledProcessError as e:
+            self.runner.print(
+                "Error: The rebase operation failed, likely due to a merge conflict.",
+                file=sys.stderr,
+            )
+            if e.stdout:
+                self.runner.print(f"--- stdout ---\n{e.stdout}", file=sys.stderr)
+            if e.stderr:
+                self.runner.print(f"--- stderr ---\n{e.stderr}", file=sys.stderr)
+
+            # Check if rebase is in progress before aborting
+            rebase_status_result = self._run_cmd(
+                ["git", "status", "--verify-status=REBASE_HEAD"],
+                check=False,
+                capture_output=True,
+                text=True,
+                read_only=True,
+                env=git_env,
+            )
+
+            # REBASE_HEAD exists, so rebase is in progress
+            if rebase_status_result.returncode == 0:
+                self.runner.print("Aborting rebase...", file=sys.stderr)
+                self._run_cmd(["git", "rebase", "--abort"], check=False, env=git_env)
+            raise LlvmPrError("rebase operation failed.") from e
+
+    def _get_https_url_for_remote(self, remote_name: str) -> str:
+        """Gets the URL for a remote and converts it to HTTPS if necessary."""
+        remote_url_result = self._run_cmd(
+            ["git", "remote", "get-url", remote_name],
+            capture_output=True,
+            text=True,
+            read_only=True,
+        )
+        remote_url = remote_url_result.stdout.strip()
+        if remote_url.startswith("git@github.com:"):
+            return remote_url.replace("git@github.com:", "https://github.com/")
+        if remote_url.startswith("https://github.com/"):
+            return remote_url
+        raise LlvmPrError(
+            f"Unsupported remote URL format for {remote_name}: {remote_url}"
+        )
+
+    def _get_commit_stack(self) -> List[str]:
+        target = f"{self.config.upstream_remote}/{self.config.base_branch}"
+        merge_base_result = self._run_cmd(
+            ["git", "merge-base", "HEAD", target],
+            capture_output=True,
+            text=True,
+            read_only=True,
+        )
+        merge_base = merge_base_result.stdout.strip()
+        if not merge_base:
+            raise LlvmPrError(f"Could not find a merge base between HEAD and {target}.")
+
+        result = self._run_cmd(
+            ["git", "rev-list", "--reverse", f"{merge_base}..HEAD"],
+            capture_output=True,
+            text=True,
+            read_only=True,
+        )
+        return result.stdout.strip().splitlines()
+
+    def _get_commit_details(self, commit_hash: str) -> tuple[str, str]:
+        # Get the subject and body from git show. Insert "\n\n" between to make
+        # parsing simple to do w/ split.
+        result = self._run_cmd(
+            ["git", "show", "-s", "--format=%B", commit_hash],
+            capture_output=True,
+            text=True,
+            read_only=True,
+        )
+        parts = [item.strip() for item in result.stdout.split("\n", 1)]
+        title = parts[0]
+        body = parts[1] if len(parts) > 1 else ""
+        return title, body
+
+    def _sanitize_branch_name(self, text: str) -> str:
+        sanitized = re.sub(r"[^\w\s-]", "", text).strip().lower()
+        sanitized = re.sub(r"[-\s]+", "-", sanitized)
+        # Use "auto-pr" as a fallback.
+        return sanitized or "auto-pr"
+
+    def _validate_merge_config(self, num_commits: int) -> None:
+        if num_commits > 1:
+            if self.config.auto_merge:
+                raise LlvmPrError("--auto-merge is only supported for a single commit.")
+
+            if self.config.no_merge:
+                raise LlvmPrError(
+                    "--no-merge is only supported for a single commit. "
+                    "For stacks, the script must merge sequentially."
+                )
+
+        self.runner.print(f"Found {num_commits} commit(s) to process.")
+
+    def _create_and_push_branch_for_commit(
+        self, commit_hash: str, base_branch_name: str, index: int
+    ) -> str:
+        branch_name = f"{self.config.prefix}{base_branch_name}-{index + 1}"
+        commit_title, _ = self._get_commit_details(commit_hash)
+        self.runner.print(f"Processing commit {commit_hash[:7]}: {commit_title}")
+        self.runner.print(f"Pushing commit to temporary branch '{branch_name}'")
+
+        git_env = self._get_git_env()
+
+        https_remote_url = self._get_https_url_for_remote(self.remote)
+
+        push_command = [
+            "git",
+            "push",
+            https_remote_url,
+            f"{commit_hash}:refs/heads/{branch_name}",
+        ]
+        self._run_cmd(push_command, env=git_env)
+        self.created_branches.append(branch_name)
+        return branch_name
+
+    def _process_commit(
+        self, commit_hash: str, base_branch_name: str, index: int
+    ) -> None:
+        commit_title, commit_body = self._get_commit_details(commit_hash)
+
+        temp_branch = self._create_and_push_branch_for_commit(
+            commit_hash, base_branch_name, index
+        )
+        pr_url = self.github_api.create_pr(
+            head_branch=f"{self.config.user_login}:{temp_branch}",
+            base_branch=self.config.base_branch,
+            title=commit_title,
+            body=commit_body,
+            draft=self.config.draft,
+        )
+
+        if self.config.no_merge:
+            return
+
+        if self.config.auto_merge:
+            self.github_api.enable_auto_merge(pr_url)
+        else:
+            merged_branch = self.github_api.merge_pr(pr_url)
+            if merged_branch and not self.repo_settings.get("delete_branch_on_merge"):
+                # After a merge, the branch should be deleted.
+                self.github_api.delete_branch(merged_branch)
+
+        if temp_branch in self.created_branches:
+            # If the branch was successfully merged, it should not be deleted
+            # again during cleanup.
+            self.created_branches.remove(temp_branch)
+
+    def run(self) -> None:
+        self.repo_settings = self.github_api.get_repo_settings()
+        self.original_branch = self._get_current_branch()
+        self.runner.print(f"On branch: {self.original_branch}")
+
+        try:
+            commits = self._get_commit_stack()
+            if not commits:
+                self.runner.print("No new commits to process.")
+                return
+
+            self._validate_merge_config(len(commits))
+            branch_base_name = self.original_branch
+            if self.original_branch == "main":
+                first_commit_title, _ = self._get_commit_details(commits[0])
+                branch_base_name = self._sanitize_branch_name(first_commit_title)
+
+            for i in range(len(commits)):
+                if not commits:
+                    self.runner.print("Success! All commits have been landed.")
+                    break
+                self._process_commit(commits[0], branch_base_name, i)
+                self._rebase_current_branch()
+                # After a rebase, the commit hashes can change, so we need to
+                # get the latest commit stack.
+                commits = self._get_commit_stack()
+
+        finally:
+            self._cleanup()
+
+    def _cleanup(self) -> None:
+        self.runner.print(f"Returning to original branch: {self.original_branch}")
+        self._run_cmd(["git", "checkout", self.original_branch], capture_output=True)
+        if self.created_branches:
+            self.runner.print("Cleaning up temporary remote branches...")
+            for branch in self.created_branches:
+                self.github_api.delete_branch(branch)
+
+
+def check_prerequisites(runner: CommandRunner) -> None:
+    runner.print("Checking prerequisites...")
+    runner.run_command(["git", "--version"], capture_output=True, read_only=True)
+    result = runner.run_command(
+        ["git", "rev-parse", "--is-inside-work-tree"],
+        check=False,
+        capture_output=True,
+        text=True,
+        read_only=True,
+    )
+
+    if result.returncode != 0 or result.stdout.strip() != "true":
+        raise LlvmPrError("This script must be run inside a git repository.")
+    runner.print("Prerequisites met.")
+
+
+def main() -> None:
+    parser = argparse.ArgumentParser(
+        description="Create and land a stack of Pull Requests."
+    )
+
+    command_runner = CommandRunner()
+    token = os.getenv(LLVM_GITHUB_TOKEN_VAR)
+    if not token:
+        raise LlvmPrError(f"{LLVM_GITHUB_TOKEN_VAR} environment variable not set.")
+
+    parser.add_argument(
+        "--base",
+        default=BASE_BRANCH,
+        help=f"Base branch to target (default: {BASE_BRANCH})",
+    )
+    parser.add_argument(
+        "--remote",
+        default=GITHUB_REMOTE_NAME,
+        help=f"Remote for your fork to push to (default: {GITHUB_REMOTE_NAME})",
+    )
+    parser.add_argument(
+        "--upstream-remote",
+        default=UPSTREAM_REMOTE_NAME,
+        help=f"Remote for the upstream repository (default: {UPSTREAM_REMOTE_NAME})",
+    )
+    parser.add_argument(
+        "--login",
+        default=None,
+        help="The user login to use. If not provided this will be queried from the TOKEN",
+    )
+    parser.add_argument(
+        "--prefix",
+        default=None,
+        help="Prefix for temporary branches (default: users/<username>)",
+    )
+    parser.add_argument(
+        "--draft", action="store_true", help="Create pull requests as drafts."
+    )
+    group = parser.add_mutually_exclusive_group()
+    group.add_argument(
+        "--no-merge", action="store_true", help="Create PRs but do not merge them."
+    )
+    group.add_argument(
+        "--auto-merge",
+        action="store_true",
+        help="Enable auto-merge for each PR instead of attempting to merge immediately.",
+    )
+    parser.add_argument(
+        "--dry-run", action="store_true", help="Print commands without executing them."
+    )
+    group = parser.add_mutually_exclusive_group()
+    group.add_argument(
+        "-v", "--verbose", action="store_true", help="Print all commands being run."
+    )
+    group.add_argument(
+        "-q",
+        "--quiet",
+        action="store_true",
+        help="Print only essential output and errors.",
+    )
+
+    args = parser.parse_args()
+
+    command_runner = CommandRunner(
+        dry_run=args.dry_run, verbose=args.verbose, quiet=args.quiet
+    )
+    check_prerequisites(command_runner)
+
+    github_api = GitHubAPI(command_runner, token)
+    if not args.login:
+        try:
+            args.login = github_api.get_user_login()
+        except urllib.error.HTTPError as e:
+            raise LlvmPrError(f"Could not fetch user login from GitHub: {e}") from e
+
+    if not args.prefix:
+        args.prefix = f"users/{args.login}/"
+
+    if not args.prefix.endswith("/"):
+        args.prefix += "/"
+
+    try:
+        config = PRAutomatorConfig(
+            user_login=args.login,
+            token=token,
+            base_branch=args.base,
+            upstream_remote=args.upstream_remote,
+            prefix=args.prefix,
+            draft=args.draft,
+            no_merge=args.no_merge,
+            auto_merge=args.auto_merge,
+        )
+        automator = LLVMPRAutomator(
+            runner=command_runner,
+            github_api=github_api,
+            config=config,
+            remote=args.remote,
+        )
+        automator.run()
+    except LlvmPrError as e:
+        sys.exit(f"Error: {e}")
+
+
+if __name__ == "__main__":
+    main()