Systems engineering, research, and design for mission-critical software.https://limina.agency/enhttps://limina.agency/research/01-offline-first-architecture/https://limina.agency/research/01-offline-first-architecture/Most software treats offline capability as a degraded mode. We argue it should be the default — and show how designing for zero infrastructure from day one produces fundamentally different, more resilient systems.Mon, 06 Apr 2026 00:00:00 GMTOffline-FirstP2PCRDTDistributed SystemsResilienceAnton Krupkohttps://limina.agency/research/02-terramechanics-in-real-time/https://limina.agency/research/02-terramechanics-in-real-time/How soil mechanics models developed for NASA's Lunar Roving Vehicle program became the foundation of a real-time terrain traversability system for disaster response — and why physics beats pixels for terrain classification.Mon, 06 Apr 2026 00:00:00 GMTTerramechanicsBekker-WongGPU ComputeMachine LearningPathfindingwgpuAnton Krupkohttps://limina.agency/research/03-five-prototypes-failed/https://limina.agency/research/03-five-prototypes-failed/The honest story of building ARES — a P2P command-and-control platform. Five months of research, one month of Python, five structural failures, and the design principles that emerged from each one.Mon, 06 Apr 2026 00:00:00 GMTRustPythonArchitecturePrototypingLessons LearnedP2PAnton Krupkohttps://limina.agency/research/04-polymorphic-mesh-networking/https://limina.agency/research/04-polymorphic-mesh-networking/Most mesh networks pick one transport. ARES runs them all at once — LoRa for constrained radio, QUIC for high-bandwidth, with automatic link promotion between them. Here's how polymorphic networking works and why it matters for field operations.Mon, 06 Apr 2026 00:00:00 GMTMesh NetworkingLoRaMeshtasticP2PQUICIrohRadioAnton Krupkohttps://limina.agency/research/05-cloud-as-transport-data-as-yours/https://limina.agency/research/05-cloud-as-transport-data-as-yours/What happens when you treat cloud infrastructure as a relay layer instead of a custody layer? You get P2P apps where users own their data structurally — not by policy, but by cryptographic design.Mon, 06 Apr 2026 00:00:00 GMTP2PKoraPrivacyEncryptionCRDTDecentralizationAnton Krupkohttps://limina.agency/research/06-semantic-voxel-encoding/https://limina.agency/research/06-semantic-voxel-encoding/How we designed a 16-bit voxel format that encodes material class, severity, elevation, road presence, lethality, and data provenance — giving pathfinding algorithms everything they need in 8 kilobytes per tile.Mon, 06 Apr 2026 00:00:00 GMTSSVGVoxelGPU ComputePathfindingData StructureswgpuAnton Krupkohttps://limina.agency/research/07-gpu-wave-propagation-pathfinding/https://limina.agency/research/07-gpu-wave-propagation-pathfinding/A* builds graphs. FIM* solves physics. How a wave propagation algorithm from computational physics replaced graph-based pathfinding for unstructured disaster terrain — and why it produces globally optimal paths that A* cannot.Mon, 06 Apr 2026 00:00:00 GMTPathfindingGPU ComputeEikonalFIM*wgpuWGSLA*Anton Krupkohttps://limina.agency/research/08-confidence-driven-sensor-fusion/https://limina.agency/research/08-confidence-driven-sensor-fusion/Maps show what was true last year. ML inference shows what might be true now. When they disagree, who wins? We built a GPU shader pipeline that resolves this question using confidence thresholds, hazard asymmetry, and entropy penalties.Mon, 06 Apr 2026 00:00:00 GMTSensor FusionMachine LearningSegFormerGPU ComputeONNXTerrain ClassificationAnton Krupkohttps://limina.agency/research/09-crdt-sync-over-constrained-radio/https://limina.agency/research/09-crdt-sync-over-constrained-radio/How do you synchronize a collaborative CRDT document over LoRa radio with a 233-byte MTU and 1-5 kbps throughput? With custom fragmentation, BLAKE3 verification, and privacy-preserving routing — all designed for the worst network on Earth.Mon, 06 Apr 2026 00:00:00 GMTCRDTLoroLoRaMeshtasticRadioSyncFragmentationAnton Krupkohttps://limina.agency/research/10-designing-for-gloves-and-glare/https://limina.agency/research/10-designing-for-gloves-and-glare/When your user is strapped to a harness on a rooftop wearing gloves in strong glare, 'good UX' means something different. How we reduced installation time from 7 minutes to under 3 — and NASA-TLX workload by 40% — by designing for exposure time, not tap count.Mon, 06 Apr 2026 00:00:00 GMTField UXIoTEmergency ServicesNASA-TLXOne-Handed DesignBLEQR CodesAnton Krupkohttps://limina.agency/research/11-keyboard-first-beats-mouse-first/https://limina.agency/research/11-keyboard-first-beats-mouse-first/A supervisory dashboard for hybrid sea-air drone logistics. Keyboard+mouse parity cut time-to-acknowledge by 50% and overall NASA-TLX workload by 47%. Here's the evidence and the design patterns.Mon, 06 Apr 2026 00:00:00 GMTKeyboard-FirstDashboard UXNASA-TLXDroneSupervisory SystemsAccessibilityAnton Krupkohttps://limina.agency/research/12-european-digital-sovereignty/https://limina.agency/research/12-european-digital-sovereignty/The argument for European digital sovereignty in critical infrastructure isn't nationalism — it's architecture. Zero-server, GDPR-native, open-protocol systems are structurally more sovereign than closed platforms regardless of where they're built.Mon, 06 Apr 2026 00:00:00 GMTEuropean SovereigntyGDPRDefense TechATAKNATOCritical InfrastructureAnton Krupkohttps://limina.agency/research/13-disaster-response-to-consumer-software/https://limina.agency/research/13-disaster-response-to-consumer-software/We built P2P mesh networking for mountain rescue. Then we used the same architecture to build a password manager and a notes app. The extreme constraints of disaster response produced infrastructure that's better for everyday use — here's why.Mon, 06 Apr 2026 00:00:00 GMTP2PKoraARESArchitectureProduct StrategyConsumer SoftwareAnton Krupkohttps://limina.agency/blog/webgpu-terrain-lod/https://limina.agency/blog/webgpu-terrain-lod/How we moved terrain level-of-detail processing from the CPU to the GPU using WebGPU compute shaders, achieving a 21× speedup and enabling million-triangle terrain rendering in the browser.Thu, 15 Jan 2026 00:00:00 GMTWebGPU3D RenderingPerformanceCompute ShadersLimina Systemshttps://limina.agency/systems/ares-unified/legacy/https://limina.agency/systems/ares-unified/legacy/The original Project ARES: 5 months of research into disaster-zone pathfinding, the AI/physics pipeline, and the Python prototype that proved the concept — and revealed the five structural failures that demanded a Rust rewrite.Sun, 07 Dec 2025 00:00:00 GMTProduct DesignSystems ThinkingMachine LearningUX ResearchFull-StackGEOINTPathfindingReal-Time SystemsLimina Systemshttps://limina.agency/blog/building-ares-geoint/https://limina.agency/blog/building-ares-geoint/How we designed a geospatial intelligence platform that combines satellite imagery, drone data, and physics-based AI to guide humanitarian convoys through post-disaster terrain.Fri, 05 Dec 2025 00:00:00 GMTGeospatialAIHumanitarianSystems EngineeringLimina Systemshttps://limina.agency/research/terrain-lod/https://limina.agency/research/terrain-lod/GPU-driven continuous level-of-detail system for large-scale terrain visualization. Compute shader evaluates screen-space error per patch and emits variable-density index buffers in a single dispatch.Mon, 20 Oct 2025 00:00:00 GMTWebGPUCompute Shaders3D RenderingLODLimina Systemshttps://limina.agency/systems/sensor-install/https://limina.agency/systems/sensor-install/Mobile app and system design enabling quick field sensor installation and server pairing via QR codes and Bluetooth Low Energy (BLE).Fri, 10 Oct 2025 00:00:00 GMTProduct DesignMobile AppIoTBLEQR CodesOnboardingUXCADSystem DesignLimina Systemshttps://limina.agency/blog/offline-first-field-apps/https://limina.agency/blog/offline-first-field-apps/Connectivity assumptions that work in urban environments fail catastrophically in field deployments. Here's why offline-first architecture isn't optional for sensor networks — and how CRDTs make it practical.Sat, 20 Sep 2025 00:00:00 GMTOffline-FirstIoTDistributed SystemsCRDTLimina Systemshttps://limina.agency/research/rf-denoising/https://limina.agency/research/rf-denoising/Wavelet-domain neural denoising pipeline for HF/VHF radio receivers operating below noise floor. Achieves 8dB effective SNR gain on COTS SDR hardware through learned spectral priors.Fri, 15 Aug 2025 00:00:00 GMTSignal ProcessingMachine LearningRadio SystemsEdge ComputingLimina Systemshttps://limina.agency/systems/drone-monitoring-dashboard/https://limina.agency/systems/drone-monitoring-dashboard/Keyboard-first, map-centric supervisory dashboard for a hybrid sea-air (UAV + maritime) delivery network in Hong Kong.Thu, 31 Jul 2025 00:00:00 GMTSystems UXIoT/RoboticsMaritimeUAVKeyboard-FirstAccessibilityLimina Systemshttps://limina.agency/research/offline-sync/https://limina.agency/research/offline-sync/CRDT-based synchronization protocol for field-deployed sensor networks with intermittent connectivity. Guarantees eventual consistency with sub-second merge on reconnect across 500+ node clusters.Tue, 10 Jun 2025 00:00:00 GMTCRDTDistributed SystemsOffline-FirstIoTLimina Systemshttps://limina.agency/systems/kora/apps/https://limina.agency/systems/kora/apps/Kora Vault (P2P password manager) and Kora Notes (collaborative editing) — two apps that prove the framework.Sun, 01 Jun 2025 00:00:00 GMTRustTauriP2PPassword ManagerCollaborative EditingCRDTE2E EncryptionLimina Systemshttps://limina.agency/systems/kora/technical/https://limina.agency/systems/kora/technical/8-crate Rust workspace: Iroh QUIC transport, vector-clock CRDT sync, Ed25519 identity mesh, E2E encryption pipeline.Sun, 01 Jun 2025 00:00:00 GMTRustIrohLoroCRDTQUICEd25519ChaCha20WASMP2PLimina Systemshttps://limina.agency/systems/kora/vision/https://limina.agency/systems/kora/vision/Why the cloud custody model is broken, how P2P can fix it, and the design decisions behind Kora.Sun, 01 Jun 2025 00:00:00 GMTRustP2PIrohCRDTE2E EncryptionSystems DesignPrivacy-FirstLimina Systemshttps://limina.agency/systems/ares-unified/journey/https://limina.agency/systems/ares-unified/journey/From GPS failure in disaster zones to a production P2P mesh C2 platform: the full story of ARES — why it was built, what the prototype discovered, what it could not do, and how the 18-crate Rust rewrite resolved every structural failure.Sat, 01 Feb 2025 00:00:00 GMTRustTauriP2P MeshIrohLoroSystems DesignOffline-FirstProduct DesignLimina Systemshttps://limina.agency/systems/ares-unified/technical/https://limina.agency/systems/ares-unified/technical/Complete technical documentation: 18-crate Rust workspace, Iroh P2P mesh, Loro CRDT sync, TVPE voxel encoding, FIM* GPU pathfinding, OSM+ML material fusion, radio transport, ATAK interop, and every implementation detail.Sat, 01 Feb 2025 00:00:00 GMTRustIrohLorowgpuCRDTP2PFIM*SSVGONNXTauriMAVLinkMeshtasticLimina Systems