Haven Rehab Coach for Post-Mastectomy Patients Wins Tiger Data Award

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Haven is a home rehabilitation coach designed to guide patients through shoulder exercises after breast cancer surgery, using a laptop camera and a wearable armband. The system keeps patients within movement limits set by their physical therapist and gives clinicians a detailed view of recovery between visits. The author built the backend, a Node.js and TypeScript API running on Vercel, with a time-series data layer on Tiger Cloud, Gemini-generated reports, and Auth0 sign-in. Because the armband streams arm angle data many times per second, the database schema uses hypertables, columnstore compression, and continuous aggregates to keep dashboards fast as data grows. The team's guiding principle is that deterministic code handles all safety checks while the AI only generates the wording.

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Developer shares standalone GitHub editions of open source tools he uses daily

A full-stack developer has published standalone editions of several well-known open source projects in his own GitHub account. The projects include public-apis, free-for-dev, markitdown, and ui-ux-pro-max-skill, each credited to its upstream source. He says he maintains these copies so his workflow keeps working if upstream repositories change, lets him pin specific versions, and applies consistent docs, dependency updates, CI, and linting. He encourages readers to star the original projects first and invites feedback on how others handle upstream updates.

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ProgrammingDEV Community ·

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ProgrammingDEV Community ·

Tenant-Aware Batch Processing for Document Summarization With Usage Accounting

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ProgrammingDEV Community ·

Previewing a Site on a New Server Without Editing the Hosts File

Migrating a website typically involves editing the local hosts file to test it on a new server before changing DNS records. This works because browsers still send the real domain name in the HTTP Host header and TLS SNI, so the server responds as it would after a live DNS change. Visiting the server's bare IP address instead fails because the server cannot tell which site is requested. The approach has practical drawbacks: entries are local and hard to share with colleagues, wildcard subdomains are unsupported, and stock mobile devices cannot be edited. Firefox's DNS over HTTPS can also bypass the hosts file entirely, while Chrome generally still respects it.

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