Sequential squash-merge of stacked PR chains into an epic branch. Handles dependency-ordered rebase, collision-safe backup tags, CI monitoring (delegates to /watch-ci), and post-merge verification. Use when: merging a chain of stacked PRs into an epic branch, collapsing a linear PR stack into per-PR
Sequential squash-merge of stacked PR chains into an epic branch. Handles dependency-ordered rebase, collision-safe backup tags, CI monitoring (delegates to /watch-ci), and post-merge verification. Use when: merging a chain of stacked PRs into an epic branch, collapsing a linear PR stack into per-PR squash commits, preparing an epic branch for final review. Triggers on: 'merge PRs into epic', 'squ