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The Sync State panel only ever showed Connected and Full. Two causes:
1. state_tracking{metric="state_value"} is emitted with values 0-6, where
5 is FULL+validating and 6 is FULL+proposing, but the panel declared
max: 4 with value mappings for 0-4 only. Values above 4 were pinned to
the axis ceiling and rendered unmapped. Most nodes sit at 6, so the
majority of series were clipped.
2. The gauge samples the instantaneous mode on a 10s export tick, so
states shorter than one tick fall between samples. A real sync showed
SYNCING for a single scrape and skipped TRACKING entirely. This is the
sampling hazard already noted on StateAccounting in NetworkOPs.h.
Extend the panel domain to 0-6 with Validating and Proposing mappings and
matching threshold steps, and add a colour-coded state-timeline panel where
each band's width is the time spent in that state, so brief states appear
as thin slivers rather than disappearing. The timeline reads
server_info{metric="server_state"} (raw OperatingMode 0-4) rather than
state_value, which folds 5 and 6 onto FULL and would split one Full band
into three colours.
Panel layout below the insertion point shifts down by 6 rows.
Note this makes short states legible, not lossless: exporting
StateAccounting's per-state duration accumulators is the sampling-immune
fix and is left as follow-up.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>