Reapply "Reject unsupported YAML tags in check-yaml (#2656)"

[j178]

• Revert "Bump version to 0.5.2 (Bump version to 0.5.2 #2671)"
• Revert "Revert unsupported YAML tag rejection in check-yaml (Revert unsupported YAML tag rejection in check-yaml #2670)"
• Reapply "Reject unsupported YAML tags in check-yaml (Reject unsupported YAML tags in check-yaml #2656)"

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-09-01T06:33:12.134591Z	628fff4	PR opened

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[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: 628fff4357

ℹ️ About Codex in GitHub

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• Open a pull request for review
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• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

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[Copilot]

🟡 Changes recommended

The new inline snapshot test likely fails due to a trailing newline mismatch, and the repo-wide --unsafe hook configuration weakens YAML validation more broadly than necessary.

Once you've addressed the issues Copilot identified, you can request another Copilot review.

Pull request overview

This PR reverts the repository back to version 0.5.1 and re-applies stricter check-yaml behavior by rejecting unsupported YAML tags during load, while documenting/using --unsafe as an escape hatch for tag-heavy YAML (notably mkdocs.yml).

Changes:

• Revert version references from 0.5.2 back to 0.5.1 across Rust/Python metadata, lockfiles, docs, and issue templates.
• Re-enable unsupported YAML tag rejection in check-yaml and add a regression test for unknown tags requiring --unsafe.
• Update repo hook config to run check-yaml with --unsafe.

File summaries

File	Description
uv.lock	Reverts locked package version to 0.5.1.
README.md	Updates installer URLs to v0.5.1.
pyproject.toml	Reverts Python project version to 0.5.1.
prek.toml	Enables check-yaml with --unsafe in the repo hook config.
docs/integrations.md	Updates container image examples to 0.5.1 tags.
crates/prek/src/hooks/pre_commit_hooks/check_yaml.rs	Re-enables unsupported tag rejection and adds a test covering unsafe vs load behavior.
CHANGELOG.md	Removes 0.5.2 entry, leaving 0.5.1 as the latest.
Cargo.toml	Reverts workspace/package versions to 0.5.1.
Cargo.lock	Reverts crate versions to 0.5.1.
.github/ISSUE_TEMPLATE/bug_report.yaml	Updates “current version” label to 0.5.1.

Review details

• Files reviewed: 8/10 changed files
• Comments generated: 2
• Review effort level: Lite

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.10%. Comparing base (ed225b1) to head (628fff4).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2672   +/-   ##
=======================================
  Coverage   94.10%   94.10%           
=======================================
  Files         141      141           
  Lines       30035    30043    +8     
=======================================
+ Hits        28265    28273    +8     
  Misses       1770     1770           

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