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swarm-grafana: distinct subagents by agent, over time

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mara: "the subagent should already stamp the agent on the metric. so i want
to see count of distinct subagent names per agent name over time" — it
does. New timeseries panel-46 on the subagents tab: one line per parent
agent, counting distinct subagent label values with a turn in the trailing
$__rate_interval at each point. Rolling, not cumulative — can fall as well
as rise, same shape as any other rate()-derived panel here.

Placed at y:15, below where #4491's panel-45 (stat tile, y:11-15) sits once
merged, and numbered panel-46 rather than reusing panel-45 — argus caught
that this PR and #4491 both independently added a panel-45 in the same grid
slot from a shared unmerged base, which would have collided on whichever
merged second.

Narrower than a true concurrency gauge (subagents open at this exact
instant) — that needs hive-subagent-mcp to publish its own metric, which
nothing does today; noted as a separate, harder ask on #4488.
This commit is contained in:
iris 2026-09-18 01:48:30 +02:00 • committed by mara
commit e95e988965
1 changed files with 87 additions and 0 deletions
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87
nix/host-modules/swarm-grafana/dashboards/agents.json
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@ -1404,6 +1404,80 @@
}
}
}
},
"panel-46": {
"kind": "Panel",
"spec": {
"id": 46,
"title": "Distinct subagents by agent, over time",
"description": "mara: \"the subagent should already stamp the agent on the metric. so i want to see count of distinct subagent names per agent name over time\" — it does (claude_code.session.count carries both agent and subagent labels on a subagent's own turns). One line per parent agent: at each point, how many differently-named subagents had at least one turn in the trailing $__rate_interval window. This is a ROLLING distinct count, not a running total — it can go back down once a batch of subagents stops running, same shape as any other rate()-style panel on this board. A true concurrent-right-now count (subagents open at this exact instant, able to rise and fall between scrapes) would need hive-subagent-mcp to publish its own gauge on start/stop; nothing does today, and that's a different, harder ask than this one.",
"links": [],
"data": {
"kind": "QueryGroup",
"spec": {
"queries": [
{
"kind": "PanelQuery",
"spec": {
"query": {
"kind": "DataQuery",
"group": "prometheus",
"version": "v0",
"datasource": {
"name": "@datasourceUid@"
},
"spec": {
"expr": "count by (agent) (count by (agent, subagent) (increase({__name__=\"claude_code.session.count\", hive=~\"$hive\", agent=~\"$agent\", subagent!=\"\"}[$__rate_interval]) > 0))",
"legendFormat": "{{agent}}"
}
},
"refId": "A",
"hidden": false
}
}
],
"transformations": [],
"queryOptions": {}
}
},
"vizConfig": {
"kind": "VizConfig",
"group": "timeseries",
"version": "",
"spec": {
"options": {
"legend": {
"calcs": [],
"displayMode": "list",
"placement": "bottom",
"showLegend": true
},
"tooltip": {
"mode": "multi",
"sort": "desc"
}
},
"fieldConfig": {
"defaults": {
"unit": "short",
"decimals": 0,
"color": {
"mode": "palette-classic"
},
"custom": {
"axisSoftMin": 0,
"drawStyle": "line",
"fillOpacity": 0,
"lineWidth": 1,
"showPoints": "never",
"spanNulls": false
}
},
"overrides": []
}
}
}
}
}
},
"layout": {
@ -1690,6 +1764,19 @@
"name": "panel-45"
}
}
},
{
"kind": "GridLayoutItem",
"spec": {
"x": 0,
"y": 15,
"width": 24,
"height": 8,
"element": {
"kind": "ElementReference",
"name": "panel-46"
}
}
}
]
}