Create OR update a pull request using the JellyRock template at `.github/pull_request_template.md`. Detects an existing open PR for the current branch and routes to update-mode (diff body, ask, then `gh pr edit`) instead of duplicating; aborts cleanly on merged/closed PRs. Scans branch + commits for related issues, falls back to `gh` issue search, surfaces architecture docs whose related-files were touched, and runs the four-pillar judgment passes (tech-debt scan, decision-shape detect, followup capture) so journal hygiene is part of shipping rather than a separate manual step. Required for all PRs in this repo — supersedes any default PR-creation flow.