Developer Builds AI Agent to Automate Real Estate Comps, Shares What Works

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A real estate investor and developer documented their hands-on experience building an AI agent to automate property comparable analysis, a process traditionally requiring hours of manual spreadsheet work. Early attempts using a basic LangChain agent with web scraping tools repeatedly failed with silent timeouts and no useful output. Switching to LangGraph provided more structured control by defining explicit states for data retrieval, filtering, adjustment calculation, and report generation. The developer also experimented with CrewAI's multi-agent setup, separating data analysis and property valuation roles, though this introduced additional failure points. Key lessons included building robust edge-case handling, structured JSON outputs, and pre-filtering steps to reduce API token costs.

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pictostl Turns Photos Into 3D-Printable Meshes via Browser Tool

pictostl is a browser-based tool that converts JPG, PNG, or WebP images into 3D meshes suitable for printing and modeling workflows. Users can upload images up to 10 MB, optionally add multiple views, and select from Basic, Pro, or Ultra quality tiers. The tool exports meshes in STL, GLB, OBJ, and PLY formats, with an interactive preview and adjustable dimensions before download. New verified accounts receive two free credits, covering one Basic generation and STL export, while additional generations require purchased credits. Since unseen surfaces are algorithmically inferred, the developers recommend reviewing all generated meshes carefully before sending them to a printer.

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ProgrammingDEV Community ·

Silent Cron Job Failure Left Production Monitor Dead for Five Days Undetected

A developer running WhatsApp automation for businesses discovered that a watchdog cron job, designed to alert when messaging sessions dropped silently, had never executed once despite appearing correctly configured. The crontab stored the job as expected, and a separate log file showed recent successful entries — but those entries turned out to be from manual test runs on installation day, not scheduled executions. The root cause was a sudo permission or output-redirect issue causing the cron job to emit errors on stderr every ten minutes, which cron attempted to email but discarded silently due to no mail server being installed. A key diagnostic clue was the syslog message 'No MTA installed, discarding output' appearing alongside every CMD entry, indicating the job was running but failing to capture output as intended. The incident highlights that a populated log file and a visible crontab entry do not confirm a scheduled job is actually executing successfully.

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ProgrammingDEV Community ·

Union Alpha AI Model Revealed as Pareto by unbiased.ai, Free Access Ends Early

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ProgrammingDEV Community ·

BCA Student Builds Python CLI Contact Book App with Local JSON Storage

A second-year BCA student has developed a command-line contact book application built entirely in Python as their fourth personal project. The app supports full CRUD operations — adding, viewing, searching, and deleting contacts — through an interactive menu interface. All contact data is stored locally in a JSON file, ensuring persistence between sessions, while input validation enforces 10-digit phone numbers and proper email formats. The project also incorporates try-except error handling to prevent crashes from bad or missing inputs. The student has published the full codebase on GitHub and is seeking community feedback on potential next steps, such as adding an edit feature or migrating to a SQLite database.

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