Apps for iPhone, iPad, Mac and the web, and what we learn building them.https://objectgraph.com/en-ushttps://objectgraph.com/blog/iretrophone-3-the-2008-app-done-properly/https://objectgraph.com/blog/iretrophone-3-the-2008-app-done-properly/Our App Store opening-day rotary dialer, rewritten in SwiftUI: a measured Western Electric dial, synthesized clicks, and nothing on the screen the 2008 version did not have.Wed, 09 Sep 2026 00:00:00 GMThttps://objectgraph.com/blog/iseismometer-1-7-home-seismic-network/https://objectgraph.com/blog/iseismometer-1-7-home-seismic-network/A complete rebuild for iPhone, iPad and Mac: a real gravity filter, an event detector, recordings you can open in NumPy, and a Mac that receives every phone in the house. 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Here is the prompt and the result.Fri, 17 Apr 2026 00:00:00 GMThttps://objectgraph.com/blog/introducing-catalyst-ai-platform/https://objectgraph.com/blog/introducing-catalyst-ai-platform/A multi-tenant AI platform with multi-provider models, Python execution, image generation, web search, and more — deployed at catalyst.voov.aiTue, 17 Feb 2026 00:00:00 GMThttps://objectgraph.com/blog/nanochat-dgx-spark/https://objectgraph.com/blog/nanochat-dgx-spark/How I adapted Andrej Karpathy's nanochat to run on NVIDIA DGX Spark with CUDA 13.0 - complete training results includedFri, 21 Nov 2025 00:00:00 GMThttps://objectgraph.com/blog/much-needed-update-geosq/https://objectgraph.com/blog/much-needed-update-geosq/Major updates to GeoSquare including elevation profiles, GPX viewer, and GeoJSON tools for our 10k monthly usersFri, 03 Oct 2025 00:00:00 GMThttps://objectgraph.com/blog/linux-add-swap/https://objectgraph.com/blog/linux-add-swap/How to add Swap to LinuxSat, 26 Jul 2025 00:00:00 GMThttps://objectgraph.com/blog/building-mcp-pyexec-python-execution-server/https://objectgraph.com/blog/building-mcp-pyexec-python-execution-server/Complete guide to building a secure Python execution MCP server with Docker isolation, JWT authentication, session management, and HTTP streaming supportFri, 25 Jul 2025 00:00:00 GMThttps://objectgraph.com/blog/migrating-supabase-jwt-jwks/https://objectgraph.com/blog/migrating-supabase-jwt-jwks/How to upgrade your FastAPI authentication to use Supabase JWKS for better security and performanceMon, 21 Jul 2025 00:00:00 GMThttps://objectgraph.com/blog/how-to-use-mcp-inspector/https://objectgraph.com/blog/how-to-use-mcp-inspector/Use MCP Inspector for HTTP StreamingWed, 16 Jul 2025 00:00:00 GMThttps://objectgraph.com/blog/geo-tracker-gps-tracking/https://objectgraph.com/blog/geo-tracker-gps-tracking/Geo Tracker - 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