chore(ci): 🤖 improve changelog parsing

[punkbit]

Why?

The changelog extraction logic was previously embedded directly in the release workflow. This made it difficult to test locally and debug issues without triggering the full CI pipeline, e.g. ops runtime requires going through the pull request review/feedback cycle that can be quite long making it hard to iterate/TIAS. Recently, noticed that changelog descriptionm wasn't properly included in the github release notes. Also, when changelog entries contained contributor mentions like @username, GitHub would tag the user, e.g. @deprecated which @<term> are now escaped.

How?

• Extracts changelog parsing logic from the release workflow into a script
• Adds @username mention escaping to prevent unintended GitHub notifications
• Improves error handling with clear fallback messages when changelog content is unavailable

Preview?

⚠️ Tested in a separate playground environment due to pull request feedback/review loop which is too long for this type of work. While the playground environment tries to be as close as Click UI's repository, there might be differences and further iterations may be required to be addressed separately.

Expected flow

demo-gh-release-changelogs-output--enc.mp4

Expected output A

Expected output B

[changeset-bot]

⚠️ No Changeset found

Latest commit: 79bb73b

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[github-actions]

Claude finished @punkbit's task in 54s —— View job

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PR Review

• Read changed files
• Analyze the implementation
• Post review findings

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Nice work! The refactor is clean and the @mention escaping is a smart catch. The previously flagged stdout/stderr bug has been addressed in commit df6900eb — all error paths in the script now correctly use >&2, so CHANGELOG is empty on failure and the workflow fallback kicks in as intended.

💡 Suggestion (non-blocking)

• .scripts/bash/extract-changelog line 41–42: The grep -v '^## [0-9]' filter is dead code — the while loop already breaks on any ^## [0-9] line, so version headers can never appear in $CHANGELOG by the time this runs. Safe to remove.

  Fix this →

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Otherwise looks good to merge! 🙌

[github-actions]

Claude finished @punkbit's task in 52s —— View job

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PR Review

• Read changed files
• Analyze the implementation
• Post review findings

---

All previously flagged issues have been resolved. The stderr fix from df6900eb is correct — error messages go to >&2, leaving stdout clean so CHANGELOG is empty on failure and the workflow fallback kicks in properly. The dead code (grep -v '^## [0-9]') was removed in 79bb73ba.

✅ Looks great! No issues found — nice work! The refactor is clean, the @mention escaping regex is correct, and the error handling flows as intended. Ready to merge.

[workflow-authentication-public]

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