diff --git a/.github/scripts/commit-filesize-diff-summary.py b/.github/scripts/commit-filesize-diff-summary.py
new file mode 100755
index 0000000000..90fab82152
--- /dev/null
+++ b/.github/scripts/commit-filesize-diff-summary.py
@@ -0,0 +1,222 @@
+#!/usr/bin/env python3
+import argparse
+import subprocess
+import sys
+from dataclasses import dataclass
+from itertools import chain
+from pathlib import Path
+from typing import Dict, Iterable, List, Literal, Optional, Tuple
+
+
+@dataclass
+class GitDiffTreeRecord:
+    """Represents a line of output from 'git diff-tree'"""
+
+    src_mode: str
+    src_hash: str
+    dst_mode: str
+    dst_hash: str
+    src_path: Path
+    dst_path: Optional[Path]
+    status: Literal["A", "C", "D", "M", "R", "T", "U", "X"]
+    score: Optional[int]
+
+
+@dataclass
+class GitChange:
+    diff_record: GitDiffTreeRecord
+    bytes_changed: int
+
+
+def parse_git_diff_tree_output(output: str) -> List[GitDiffTreeRecord]:
+    """Parses the output of `git diff-tree` as described in the "Raw Output" section
+    of the man page
+    """
+
+    def make_record(line: str) -> GitDiffTreeRecord:
+        src_mode, dst_mode, src_hash, dst_hash, rest = line[1:].split(" ", maxsplit=4)
+        status_score_and_paths = rest.split("\t")
+        return GitDiffTreeRecord(
+            src_mode=src_mode,
+            src_hash=src_hash,
+            dst_mode=dst_mode,
+            dst_hash=dst_hash,
+            status=status_score_and_paths[0][0],
+            score=int(status_score_and_paths[0][1:])
+            if len(status_score_and_paths[0]) > 1
+            else None,
+            src_path=Path(status_score_and_paths[1]),
+            dst_path=Path(status_score_and_paths[2])
+            if len(status_score_and_paths) >= 3
+            else None,
+        )
+
+    return [make_record(line) for line in output.splitlines(keepends=False)]
+
+
+def get_blob_sizes(hashes: Iterable[str]) -> Dict[str, Optional[int]]:
+    """Fetches the sizes, in bytes, of git blobs
+
+    :param hashes: A iterable of git blob hashes
+    :type hashes: Iterable[str]
+
+    :return: A dictionary that mapping blob hashes to their size if the blob exists,
+             or None otherwise
+    :rtype: Dict[str, Optional[int]]
+    """
+    input = "\n".join(set(hashes))
+    cat_file_output = subprocess.run(
+        ["git", "cat-file", "--batch-check"],
+        input=input,
+        check=True,
+        text=True,
+        capture_output=True,
+    ).stdout
+
+    def make_object_size_tuple(line: str) -> Tuple[str, Optional[int]]:
+        hash, *_, size = line.split()
+        return (hash, int(size) if size != "missing" else None)
+
+    return dict(
+        make_object_size_tuple(line)
+        for line in cat_file_output.splitlines(keepends=False)
+    )
+
+
+def get_file_size_differences(commit_range: str) -> Dict[Path, GitChange]:
+    """Computes the size difference, in bytes, of files changed between two commits
+
+    :param commit_range: A git commit range (e.g. HEAD~3..HEAD)
+    :type commit_range: str
+
+    :return: A dictionary mapping paths (relative to repository root) to size differences
+    :rtype: dict[Path, GitChange]
+    """
+    changed_records = parse_git_diff_tree_output(
+        subprocess.run(
+            ["git", "diff-tree", "-r", commit_range],
+            capture_output=True,
+            text=True,
+            check=True,
+        ).stdout
+    )
+
+    sizes = get_blob_sizes(
+        chain.from_iterable((idx.src_hash, idx.dst_hash) for idx in changed_records)
+    )
+
+    assert {"A", "D", "M"}.issuperset(idx.status for idx in changed_records)
+
+    def as_int(maybe_num: Optional[int]) -> int:
+        return maybe_num or 0
+
+    return {
+        x.src_path: GitChange(
+            diff_record=x,
+            bytes_changed=as_int(sizes[x.dst_hash]) - as_int(sizes[x.src_hash]),
+        )
+        for x in changed_records
+    }
+
+
+def main(
+    commit_range: str,
+    quiet: bool = False,
+    limit: Optional[int] = None,
+    show_n_largest_files: int = 30,
+) -> Literal[0, 1]:
+    size_differences = get_file_size_differences(commit_range)
+    cumulative_size_difference = sum(x.bytes_changed for x in size_differences.values())
+    exceeds_limit = limit is not None and cumulative_size_difference > limit
+
+    def bytes_diff(num):
+        return ("+" if num >= 0 else "") + human_friendly_bytes(num)
+
+    if not quiet:
+        print(f"Total file size difference for commit range '{commit_range}': ")
+        print(f"\t{bytes_diff(cumulative_size_difference)}", end="")
+        print(f" (Exceeds set limit of {bytes_diff(limit)})" if exceeds_limit else "")
+
+        largest_n_sizes = sorted(
+            size_differences.items(), key=lambda x: x[1].bytes_changed, reverse=True
+        )[:show_n_largest_files]
+
+        if largest_n_sizes:
+            print("")
+            print(f"Largest {len(largest_n_sizes)} filesize differences:")
+
+        for path, val in largest_n_sizes:
+            print(f"\t{bytes_diff(val.bytes_changed)}\t{path}")
+
+    return 1 if exceeds_limit else 0
+
+
+def num_bytes(arg: str) -> int:
+    """Converts a string to a number of bytes"""
+    error = argparse.ArgumentTypeError(
+        f"'{arg}' cannot be parsed into a number of bytes"
+    )
+    try:
+        return int(arg)
+    except ValueError:
+        pass
+
+    if len(arg) < 3:
+        raise error
+
+    num, suffix = (arg[:-2], arg[-2:])
+    shift_values = {
+        "KB": 1,
+        "MB": 2,
+        "GB": 3,
+        "TB": 4,
+        "PB": 5,
+        "EB": 6,
+        "ZB": 7,
+        "YB": 8,
+    }
+
+    shift = shift_values.get(suffix, None)
+
+    if shift is None:
+        raise error
+    try:
+        return int(num) << (shift * 10)
+    except ValueError:
+        raise error
+
+
+def human_friendly_bytes(num: int) -> str:
+    """Prints a number of bytes as a human friendly string"""
+    for prefix in ["", "K", "M", "G", "T", "P", "E", "Z"]:
+        if abs(num) < 1024.0:
+            return f"{num:.1f}{prefix}B"
+        num /= 1024.0
+    return f"{num:.1f}YB"
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(
+        description="A program that summarizes the file size "
+        + "differences between two git commits."
+    )
+    parser.add_argument(
+        "commit_range",
+        default="HEAD^..HEAD",
+        type=str,
+        help="Commit range to commit the diff for (e.g. HEAD~3..HEAD)",
+    )
+    parser.add_argument("--quiet", action="store_true", help="Silence all output")
+    parser.add_argument(
+        "--limit",
+        type=num_bytes,
+        help="Exit non-zero if total changes exceeds this value. "
+        + "Can be a raw number of bytes (e.g. 65536) or a suffixed value (e.g 2MB)",
+    )
+    parser.add_argument(
+        "--show-n-largest-files",
+        type=int,
+        help="Show this many of the largest files in diff",
+        default=30,
+    )
+    sys.exit(main(**vars(parser.parse_args())))
diff --git a/.github/workflows/code-quality.yml b/.github/workflows/code-quality.yml
new file mode 100644
index 0000000000..156d4d7642
--- /dev/null
+++ b/.github/workflows/code-quality.yml
@@ -0,0 +1,21 @@
+name: Code Quality Checks
+
+on:
+  workflow_dispatch:
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  pull_request:
+    if: github.event_name == 'pull_request'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: "3.9"
+      - name: Check Pull Request Size
+        run: |
+          git fetch origin ${{ github.event.pull_request.base.ref }} --quiet # Need to manually fetch base branch in CI
+          python ./.github/scripts/commit-filesize-diff-summary.py --limit 2MB origin/${{ github.event.pull_request.base.ref }}..HEAD