Remove spellcheck, gitstream-cm & pr-labler workflows

[jjw24]

No longer required. coderabbitai will take care of spell check and labelling, and comments from gitstream-cm have become less-effective.

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Summary by cubic

Summary of changes

Removed the repo’s spellcheck and gitStream automations to simplify CI and cut noisy PR comments. Spellchecking is now handled by @coderabbitai, and gitStream comments/labels are no longer used.

• Details
  • Changed: CI no longer runs .github/workflows/spelling.yml (check-spelling/check-spelling) or .github/workflows/gitstream.yml (linear-b/gitstream-github-action); PRs will no longer receive gitStream labels/comments or spellcheck comments.
  • Added: No new workflows or code; spellcheck responsibility moves to @coderabbitai (external).
  • Removed: .cm/gitstream.cm, all .github/actions/spelling/* configs, and both workflows (spelling.yml, gitstream.yml).
  • Memory: No runtime impact; minor reduction in CI minutes and artifact/cache usage.
  • Security: Slightly reduced supply-chain and permissions surface by removing third‑party actions; no new secrets introduced.
  • Tests: No unit tests added or changed (config-only removals).

^{Written for commit a403faa. Summary will update on new commits.}

[cubic-dev-ai]

No issues found across 12 files

[coderabbitai]

📝 Walkthrough

Walkthrough

Removes gitStream automation and the repository spell-checking GitHub Actions workflow plus all associated spell-check configuration and documentation files, disabling those automated PR annotations and spelling checks.

Changes

Cohort / File(s)	Summary
gitStream automation \.cm/gitstream.cm, .github/workflows/gitstream.yml	Deleted gitStream manifest and workflow that produced PR labels, review-time labels, expert-explain comments, TODO detection, and screenshot requests.
Spelling workflow .github/workflows/spelling.yml	Removed the GitHub Actions workflow that ran check-spelling on PRs and posted comments/updates.
Spelling configuration & docs .github/actions/spelling/README.md, .github/actions/spelling/advice.md, .github/actions/spelling/allow.txt, .github/actions/spelling/candidate.patterns, .github/actions/spelling/excludes.txt, .github/actions/spelling/expect.txt, .github/actions/spelling/line_forbidden.patterns, .github/actions/spelling/patterns.txt, .github/actions/spelling/reject.txt	Removed all spell-check configuration files, allowlists/expect lists, regex pattern sets (candidates, patterns, forbidden, excludes), and supporting documentation.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~12 minutes

Possibly related PRs

• Fix false failing spell check rules #3745: Deletes the same spelling configuration files (.github/actions/spelling/expect.txt, patterns.txt, etc.).
• Remove cm percent new code automation & ignore specific branches #2823: Overlaps changes to .cm/gitstream.cm and previously-modified gitStream automations.
• Update gitstream.cm minutes to review trigger rule #2960: Modifies gitstream.cm automations (e.g., estimated review time) that this PR removes.

Suggested reviewers

• Garulf
• Yusyuriv
• taooceros
• VictoriousRaptor
• deefrawley

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Description check	✅ Passed	The PR description accurately describes the changeset: removing spellcheck, gitStream automations, and PR labeler configurations. It explains the rationale and impact clearly.
Title check	✅ Passed	The title accurately describes the main changes: removal of spellcheck, gitstream-cm, and pr-labeler workflows. It is concise, specific, and directly reflects the primary purpose of the changeset.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch remove_spellcheck_gitstream-cm_workflow

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