When a pull request opens, an agent can read the diff, pull the linked ticket for context, and post a summary that tells the reviewer what actually changed, what's risky, and what test coverage looks like — before a human ever opens the file tree. This isn't a substitute for a real code review; it's the difference between a reviewer starting cold on a 40-file diff versus starting with a two-paragraph brief that already flags "this touches the auth middleware and has no new tests." Teams that adopt this cut review latency because reviewers can triage which PRs need deep attention right now versus which are safe to skim, and stale reviews get a nudge before they quietly block a release.
Large or busy engineering teams lose real days to PRs that sit unreviewed simply because nobody skimmed them fast enough to know they were urgent. A twelve-file refactor and a one-line config change look identical in a Slack notification, so reviewers triage by gut feel or by whoever opened the PR, not by actual risk. The other cost is context loss: a reviewer has to open the linked ticket, re-read the original spec, then diff the code against it manually to check if the implementation actually matches what was asked for — and half the time the ticket link is missing or stale. Nobody's actively tracking review SLA either, so a PR that should've been reviewed same-day quietly sits for four, blocking a release train nobody notices until it's already late. An agent removes the triage and context-gathering step entirely, and it's the one thing that doesn't get skipped when the team is heads-down.
A webhook fires the moment a PR opens or is marked ready for review, giving the agent the diff, target branch, and author.
Integration: github
It resolves the linked ticket from the PR description or branch name and reads the original spec so the summary can note whether the implementation matches intent.
Integration: linear
The agent writes a plain-language summary of what changed, calling out anything touching auth, payments, migrations, or other high-blast-radius code paths.
The summary lands directly on the PR and simultaneously in the team's review channel so reviewers see it without switching context.
Integration: slack
If the PR sits unreviewed past the team's agreed threshold, the agent pings the assigned reviewer directly rather than letting it silently age.
Once the PR merges, the agent updates the ticket status and links the merge commit, closing the loop without the author doing it manually.
No. It only summarizes, flags risk, and tracks SLA — every approval and merge decision stays with a human reviewer.
The agent notes the missing link in its summary and still summarizes the diff itself; it doesn't block or reject PRs for missing ticket references.
Risk flags are configurable per repo — typically file paths (auth, payments, migrations), diff size, and whether new code paths lack corresponding tests.
Yes, the same summary format applies across every connected repo, so reviewers get a consistent brief regardless of which service the PR lives in.
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