metric_aggregation_engine.md

metric aggregation engine

Language: Python · Sphere: programming · Category: Monitoring

What it does

Metric Aggregation Engine

A complete metric aggregation system supporting counters, gauges, and histograms with label support and quantile computation.

Guarantee

When it runs, metric aggregation engine guarantees requests.get(labels={'endpoint': '/users'}) == 4; requests.get(labels={'endpoint': '/users'}) + requests.get(labels={'endpoint': '/orders'}) == 5; conns.get() == 42 (proven by run).

Checkable constraints:

• requests.get(labels={'endpoint': '/users'}) == 4
• requests.get(labels={'endpoint': '/orders'}) == 1
• requests.get(labels={'endpoint': '/users'}) + requests.get(labels={'endpoint': '/orders'}) == 5
• conns.get() == 42
• latency.get_count(labels={'ep': '/u'}) == 5
• abs(latency.get_sum(labels={'ep': '/u'}) - 3.35) < 1e-12
• buckets.get(0.1) == 1
• buckets.get(0.5) == 2

Verification evidence

• Green-run: ✓ passes (re-run under the extractor's gate)
• Constraint strength: recovery (truth-pinned)
• Independent oracle: — none yet (green-run candidate; not an axiom under the frozen ruler)
• Peer review: unreviewed

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