Agent of the Day – October 15, 2026
Code explains what changed. Almost nothing explains why. Today’s Agent of the Day is Design Decision Gate , the workflow that stands at the pull request door and asks for the reasoning.
Agent of the Day: Design Decision Gate
Section titled “Agent of the Day: Design Decision Gate”Design Decision Gate runs on pull requests. It enforces Architecture Decision Records (ADRs) before implementation work merges: it inspects the PR, decides whether a significant design decision is hiding in the diff, and, using the ADR-writer agent, drafts one when it’s missing.
Here is what the live logs show for the last few hours, all three runs successful:
| Run | Started (UTC) | Duration | Tokens |
|---|---|---|---|
| 38743544914 | Oct 15, 13:32 | 8.8m | 4,977 |
| 38745396329 | Oct 15, 13:45 | 7.3m | 432 |
| 38745652557 | Oct 15, 13:47 | 9.0m | 4,223 |
The third run is the interesting one. On PR #69048, the gate pushed a commit (cda3028) to the PR branch and then left a comment explaining what it did. Not a nag, but an actual contribution the author can edit or reject.
The middle run is a nice contrast: just 432 tokens. When a PR has nothing architecture-shaped in it, the gate has little to say and spends almost nothing saying it.
Why it matters
Section titled “Why it matters”- Decisions get written down while context is fresh, not six months later during an archaeology session.
- Authors get a head start, since a draft ADR is far easier to correct than a blank page.
- Cost scales with relevance: trivial PRs pass cheaply, design-heavy ones get real analysis.
Other agents were busy on the same PR, too. Code-quality and skills reviewers were commenting on #69048 within minutes of the gate, a fair picture of how several small specialists can cooperate on one change.
Try it
Section titled “Try it”Browse the workflow source, adapt the ADR rules to your own team, and let your pull requests explain themselves: github/gh-aw.