500 years of Joseon court omens as an observability dashboard
In plain words
This observability dashboard presents historical Korean court records from the Joseon dynasty (1392-1910) as a system monitoring interface. Designed for developers and historians interested in temporal data visualization, it transforms centuries of documented omens and celestial observations into an interactive dashboard format. The tool allows users to explore patterns in historical records using modern observability principles, making ancient Korean administrative documentation accessible through contemporary technical frameworks.
written from the facts on this page · September 2026
Does the same job
all alternatives →




- ATA Tree-Based Way to Navigate Browsing History2015 · joeltg.github.io · ▲43
More dev tools this month
the category →



Open-source GTM skills for technical founders
Dev tools · 29d ago · gtmcofounder.com

OpenTrailPaper is open-source bike computer firmware for the LilyGO T5S3 4.7" E-Paper PRO. It supports offline maps, GPX routes, FIT recording and Bluetooth sensors.
Dev tools · 2d ago · opentrailpaper.com

Launched alongside, May 2026
the whole month →

Parallel agents, diff reviewer, and multi-model comparisons
Dev tools · May 2026 · kilo.ai


- NW
Hey HN, Henry here from Cactus. We open-sourced Needle, a 26M parameter function-calling (tool use) model. It runs at 6000 tok/s prefill and 1200 tok/s decode on consumer devices. We were always frustrated by the little effort made towards building agentic models that run on budget phones, so we conducted investigations that led to an observation: agentic experiences are built upon tool calling, and massive models are overkill for it. Tool calling is fundamentally retrieval-and-assembly (match query to tool name, extract argument values, emit JSON), not reasoning. Cross-attention…
Life & fun · May 2026 · github.com
- FM
Dev tools · May 2026 · github.com