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What is PR Chat?

PR Chat lets you interact with Unblocked directly in your pull request by mentioning @unblocked in a comment. Beyond requesting standard reviews and summaries, you can have a conversation with Unblocked to get deeper insight into the code, request targeted re-reviews, or generate visual diagrams. PR Chat understands natural language — not just keywords or fixed commands. A short prompt like @unblocked review works, and so does @unblocked can you review just the python code. You can include arbitrary guidance to shape the response. Unblocked reacts to your comment with 👀 to confirm it’s working, then posts its response when complete.

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Request a focused review

After an initial review, you may want Unblocked to look at your PR again with a different focus. Mention @unblocked with specific instructions to guide the review. Quick review
Provide additional context Give Unblocked more information about intent or constraints so it can refine its feedback:
Focus on a specific area Ask Unblocked to concentrate on a particular aspect of the changes:
Re-review after new commits When you’ve pushed additional commits to address earlier feedback, ask for a fresh look at specific files:
A manually requested review always triggers a new review, even if one already exists for the same commit. Unblocked posts a reply comment when the review completes, linking back to your request.

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Ask questions

Use PR Chat to ask Unblocked questions about the code in your pull request, the broader system, or the intent behind the changes. Unblocked draws on the context connected to your workspace to provide informed answers. Understand the changes
Explore the broader system
Clarify intent or design decisions
Because Unblocked has access to your connected context — including past pull requests, documentation, and team discussions — answers go beyond what’s visible in the diff.

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Get a PR summary

Ask Unblocked to summarize a pull request and it will post a concise explanation of what changed and why, directly in the PR comment thread. This is useful when you want a quick overview before reviewing, or need to catch up on a PR you’ve been tagged on.
You can also narrow the scope:

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Write or update the PR description

Ask Unblocked to write or update the pull request description field itself — not just post a summary in chat. Unblocked generates a description based on the diff and any connected context, then edits the PR description in place. Generated descriptions lead with a Context section — a short, sourced summary of why the change was made, drawn from the linked issues, prior pull requests, design docs, and conversations behind it, with links back to those sources.
This is useful when you’ve opened a PR without a description, or want to replace a placeholder with something more informative before requesting review.

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Request diagrams

Ask Unblocked to generate diagrams that visualize data flows, architecture, or relationships in the codebase. Diagrams are rendered directly in the PR comment thread.
Diagrams are useful for onboarding reviewers, documenting complex flows, and confirming that your mental model matches the actual implementation.