Ilker ManapandClaude Opus 5
c6df0659af
CI / test (push) Successful in 1m50s
The dashboard charted what the cluster had been billed for — requests, tokens, spend, all from llmgw's own store — and nothing about whether it was healthy. Saturation, queue depth, cache occupancy and replica counts were numbers in a table at the instant the page loaded, with no way to see that one of them had been climbing for an hour. Four line charts now, read back from wherever the metrics were scraped to. Read back rather than kept twice. llmgw publishes these already; what a gauge cannot do is remember, and a ring buffer in this process would be a rival copy of the same numbers with its own retention, lost on every restart and disagreeing with the one an operator has on screen elsewhere. monitoring.prometheus is empty by default and the panels are then absent rather than empty. One axis per chart, always. Two measures of different scale belong in two charts: a second y-axis lets any two lines be made to cross wherever the author likes and the reader cannot tell it happened. Four colours, handed out in fixed order, never cycled. A fifth series is summed into "other" and drawn in grey — dropping it would make a chart that does not add up, and inventing a hue for it would put two lines on the page that nobody can tell apart. The fold is by timestamp, not by position: the tail's series do not share sample times, and adding them by index slides points sideways onto each other's clock. A legend for every chart with more than one line, because colour alone is not an encoding a reader can rely on. A flat zero is drawn along the bottom rather than left blank: nothing happening is a real answer, and an empty frame reads as a broken chart. A single sample is not a line and says so instead of putting a dot in the corner. One failed query fails all four panels. Three drawn and one blank invites reading the blank one as "nothing is happening there". NaN is dropped rather than plotted. Prometheus sends it as a string for a sample it has no value for, Go's ParseFloat accepts it happily, and one NaN coordinate is an SVG path that does not draw at all — taking the rest of the line with it. Axis maxima are rounded to a number a person would pick. An axis topping out at 0.8347 makes every gridline unreadable, and the shape is what a chart is for. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>