Peninsula school district in Washington state is using AI-powered “vibe coding” to build classroom and district tools, aiming to cut costs while tailoring functionality to local needs. The district created LessonLens, which lets teachers film instruction and upload lessons into an AI platform for feedback, including whether they provided students enough time to think before intervening. District technology leaders said the tool was created in-house using Claude Code, avoiding subscription products that would otherwise require higher spending for incremental improvements. The reporting described that AI coding can reduce development time so that fixes that were previously too expensive to address can be iterated quickly. Beyond LessonLens, Peninsula said it has used the approach for other operational tools such as accounting support, human resources, and workflow components like electronic signatures. District leaders estimated potential annual savings of about $220,000 by reducing purchases and shifting to bespoke development. For higher education professionals watching K-12 practice, the case illustrates how AI development is moving from experimentation to operational procurement decisions—especially for districts trying to translate funding constraints into faster, localized technology delivery.