The DIY path has gotten genuinely good. Anthropic's official Claude Code GitHub Action responds to @claude mentions on issues and PRs, implements changes, and opens pull requests. Codex and other agent CLIs run headless in CI. A cron job or an n8n flow can label-watch a repository and kick off an agent run. If your team is one provider deep and comfortable owning YAML, that may be enough. ProPR can coexist with it.
The DIY stack leaves the product around the loop for you to build. Planning surfaces, context previews, model comparison, retries, permissions, recovery, and unified records all require more workflow code. When something goes wrong at 2am, the record of what the agent saw, did, and cost may live across several CI logs.
ProPR packages that layer and runs on your infrastructure: plan with visible context, run each task in its own Git worktree and Docker workspace, route a supported agent or model per task, refine the PR from GitHub comments, and keep prompts, diffs, logs, cost, and recovery actions attached to every task.