Developer shares 5 key lessons from building an AI-powered GitHub PR Chrome extension

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A software developer built PR Focus Pro, a Chrome extension that uses AI to triage GitHub pull requests with risk scoring, after struggling with an unmanaged review queue. After six weeks in production, the developer identified critical technical mistakes made during the build process. A major flaw involved storing state in memory within a Manifest V3 service worker, which Chrome terminates after roughly 30 seconds of inactivity, causing users to see blank screens. Another issue was unintentional bursts of GitHub API calls triggered each time the service worker restarted, which required a throttle mechanism to fix. A reader also flagged a streaming bug where incomplete data chunks caused silent token drops, resolved by implementing a line buffer to carry fragments across reads.

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