Tom Boucher 5237fae537 feat(#759): non-destructive CHANGELOG preview in the rc release job (#763) ...

The rc action publishes a release candidate to @next for testing but
never surfaces the curated CHANGELOG section for the version under test —
render only runs destructively at finalize (#715), so there was no safe
way to preview the upcoming notes during the RC window.

Add a --preview mode to scripts/changeset/cli.cjs cmdRender: it renders
the dated release section to stdout via the existing renderChangelog/
serializeChangelog path (with priorChangelog: null, so only the new
section is emitted), reuses the shared injectEmptyPlaceholder helper for
zero-fragment releases, and returns WITHOUT writing CHANGELOG.md or
deleting any .changeset fragment. Wire a "Preview CHANGELOG" step into
the rc job that renders to a file (standalone command, so a malformed
fragment fails the step) and cats it to the job summary and log.

Closes #759

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

2026-06-07 10:05:21 -04:00

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