cohere-observability

# Cohere Observability ## Overview Set up production observability for Cohere API v2 with Prometheus metrics, OpenTelemetry tracing, and AlertManager rules. Tracks per-endpoint latency, token usage, error rates, and costs. ## Prerequisites - Prometheus or compatible metrics backend - OpenTelemetry SDK installed - `cohere-ai` SDK v7+ ## Instructions ### Step 1: Metrics Collection ```typescript import { Registry, Counter, Histogram, Gauge } from 'prom-client'; const registry = new Registry(); // Per-endpoint request counter const requestCounter = new Counter({ name: 'cohere_requests_total', help: 'Total Cohere API requests', labelNames: ['endpoint', 'model', 'status'], registers: [registry], }); // Latency histogram const requestDuration = new Histogram({ name: 'cohere_request_duration_seconds', help: 'Cohere request duration', labelNames: ['endpoint', 'model'], buckets: [0.1, 0.25, 0.5, 1, 2.5, 5, 10, 30], registers: [registry], }); // Token usage tracking const tokenCounter = new Counter({ name: 'cohere_tokens_total', help: 'Total tokens consumed', labelNames: ['endpoint', 'model', 'direction'], // direction: input|output registers: [registry], }); // Error counter by type const errorCounter = new Counter({ name: 'cohere_errors_total', help: 'Cohere errors by status code', labelNames: ['endpoint', 'status_code'], registers: [registry], }); // Rate limit headroom const rateLimitGauge = new Gauge({ name: 'cohere_rate_limit_remainin...