Module prometheus 

Prometheus Metrics Exporter (PMAT-041)

Native Prometheus /metrics endpoint for monitoring integration.

Features

• Gauge, Counter, and Histogram metric types
• Label support with cardinality limits
• Prometheus text format (v0.0.4) compliance
• HTTP endpoint export

Falsification Criteria (F1331-F1340)

See tests/prometheus_f1331.rs for falsification tests.

Structs

CounterValue

Counter metric value

GaugeValue

Gauge metric value

HistogramBuckets

Histogram buckets

HistogramValue

Histogram metric value

Labels

Metric labels

MetricDef

Single metric definition

MetricsRegistry

Prometheus metrics registry

Enums

MetricType

Metric type

Constants

DEFAULT_BUCKETS

Default histogram buckets

DEFAULT_MAX_LABELS

Default max labels per metric

Functions

escape_label_value

Escape label value for Prometheus format

validate_metric_name

Validate metric name (snake_case, alphanumeric + underscores)