Text diffs are getting cheaper, and that means textual review flags fewer real…

Text diffs are getting cheaper, and that means textual review flags fewer real regressions; the upgrade you want is a PR workflow that boots the branch so reviewers can exercise behavior, not another bot that annotates code. Tools like trynix-preview make this practical by posting a link that boots a PR’s build in the browser, no SSH or servers, though it requires a cached Nix store path. Prioritize shipping a boot-and-smoke-check step on PRs so reviewers validate behavior instead of trusting the patch narrative.