chore(pre-commit): disallow large files

[jmelahman]

Description

Large files are easy to accidentally check in and very sticky in git history, so let's be intentional about checking them in.

There are currently 2 files over the limit, and neither are expected to be updated regularly,

-rw-r--r-- 1 jamison jamison 1.2M Jan 20 08:22 uv.lock
-rw-r--r-- 1 jamison jamison 4.0M Dec 29 14:11 backend/tests/integration/common_utils/test_files/Sample.pdf
-rw-r--r-- 1 jamison jamison 21M Dec 29 14:11 backend/hello-vmlinux.bin

How Has This Been Tested?

prek run --all-files

Additional Options

• Override Linear Check

---

Summary by cubic

Add a pre-commit hook to block files larger than 1.5 MB from being committed. This prevents accidental large binaries and keeps git history lean.

• New Features

  • Added check-added-large-files (pre-commit-hooks v6.0.0) with --maxkb=1500.

• Migration

  • If a large file is required, use Git LFS or raise the limit; to bypass once, use git commit --no-verify.

^{Written for commit a705943. Summary will update on new commits.}

[cubic-dev-ai]

No issues found across 1 file

[greptile-apps]

Greptile Summary

Added a pre-commit hook to prevent accidentally committing large files (>1MB) to the repository, helping maintain git history cleanliness and repository performance.

• Added check-added-large-files hook from pre-commit/pre-commit-hooks with --maxkb=1000 (1MB limit)
• Hook only checks newly added files, so existing large files (uv.lock, Sample.pdf, hello-vmlinux.bin) are unaffected
• Uses frozen commit hash for reproducibility

Confidence Score: 5/5

• This PR is safe to merge with no risk
• The change is minimal, well-scoped, and adds a standard pre-commit hook with appropriate configuration. The hook only blocks new large files from being committed, not affecting existing files. The 1MB threshold is reasonable and the implementation follows existing patterns in the config file.
• No files require special attention

Important Files Changed

Filename	Overview
.pre-commit-config.yaml	Added check-added-large-files hook with 1MB threshold to prevent accidentally committing large files

Sequence Diagram

sequenceDiagram
    participant Dev as Developer
    participant Git as Git
    participant PreCommit as Pre-commit Framework
    participant Hook as check-added-large-files

    Dev->>Git: git add <files>
    Dev->>Git: git commit
    Git->>PreCommit: Trigger pre-commit hooks
    PreCommit->>Hook: Run check-added-large-files
    Hook->>Hook: Check each added file size
    alt File > 1000KB
        Hook->>PreCommit: Return failure
        PreCommit->>Git: Block commit
        Git->>Dev: Show error message
    else All files ≤ 1000KB
        Hook->>PreCommit: Return success
        PreCommit->>Git: Allow commit
        Git->>Dev: Commit successful
    end

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