BlogViral

Show HN: FusionCore: ROS 2 sensor fusion that outperforms robot_localization I built sensor fusion for a mobile robot and reached for robot_localization like everyone does. After spending too long fighting navsat_transform, UTM zone boundaries, and YAML covariance tuning, I wrote my own. FusionCore is a 22 state UKF that fuses IMU, wheel encoders, and GPS in ECEF directly (no coordinate projection, no extra node). It estimates IMU bias, adapts its noise covariance automatically from the innovation sequence, and gates outliers with a chi squared test on every sensor. I benchmarked it against robot_localization EKF on 6 sequences from the NCLT public dataset (University of Michigan, real robot, real GPS, RTK ground truth). It wins 5 of 6. On the 6th sequence (fall, degraded GPS over a long period) it loses badly. RL UKF diverged to NaN on all six. Configs, methodology, and full reproduce instructions are in the benchmarks/ folder. https://ift.tt/JRd7SnM April 28, 2026 at 08:46PM

Show HN: Generative UI Library for React https://ift.tt/YHhs6k9 April 30, 2026 at 02:28AM

Show HN: Send your first Peppol e-invoice in 5 minutes (EU mandate live) https://getpeppr.dev/ April 30, 2026 at 12:36AM

Show HN: A new benchmark for testing LLMs for deterministic outputs When building workflows that rely on LLMs, we commonly use structured output for programmatic use cases like converting an invoice into rows or meeting transcripts into tickets or even complex PDFs into database entries. The model may return the schema you want, but with hallucinated values like `invoice_date` being off by 2 months or the transcript array ordered wrongly. The JSON is valid, but the values are not. Structured output today is a big part of using LLMs, especially when building deterministic workflows. Current structured output benchmarks (e.g., JSONSchemaBench) only validate the pass rate for JSON schema and types, and not the actual values within the produced JSON. So we designed the Structured Output Benchmark (SOB) that fixes this by measuring both the JSON schema pass rate, types, and the value accuracy across all three modalities, text, image, and audio. For our test set, every record is paired with ...

Show HN: Open Bias – proxy that enforces agent behavior at runtime https://ift.tt/7ZP1h5T April 29, 2026 at 01:32AM

Join Us May 3: Muni Appreciation Day Kicks Off SF City Football Club's New Season By Danbee Song When you head out for a match, you'll spot the iconic Muni ”worm” logo on SFCFC jerseys.   The 2026 San Francisco City Football Club (SFCFC) season is almost here — and there’s more to celebrate than just soccer. SFCFC is the country’s first — and San Francisco’s only — supporter-owned soccer club. This weekend, it returns with fresh energy, a full home schedule and a continued partnership with Muni. The season kicks off Sunday, May 3 with Muni Appreciation Day. This special match celebrates the riders and employees who help keep San Francisco moving. Whether you're a longtime supporter or a... Published 2026-04-28T00:00:00Z https://ift.tt/3XZscCa