clade-observability

# Anthropic Observability ## Overview Every `messages.create` call should be instrumented. Track tokens, latency, cost, model, and errors. ## Logging Wrapper ```typescript import Anthropic from '@claude-ai/sdk'; const client = new Anthropic(); async function trackedCreate(params: Anthropic.MessageCreateParams) { const start = performance.now(); try { const message = await client.messages.create(params); const durationMs = Math.round(performance.now() - start); const log = { timestamp: new Date().toISOString(), model: message.model, input_tokens: message.usage.input_tokens, output_tokens: message.usage.output_tokens, cache_read_tokens: message.usage.cache_read_input_tokens || 0, duration_ms: durationMs, stop_reason: message.stop_reason, estimated_cost: estimateCost(message.model, message.usage), }; console.log('anthropic_request', JSON.stringify(log)); return message; } catch (err) { const durationMs = Math.round(performance.now() - start); console.error('anthropic_error', JSON.stringify({ timestamp: new Date().toISOString(), model: params.model, error_type: err instanceof Anthropic.APIError ? err.error?.type : 'unknown', status: err instanceof Anthropic.APIError ? err.status : null, request_id: err instanceof Anthropic.APIError ? err.headers?.['request-id'] : null, duration_ms: durationMs, })); throw err; } } function estimateCost(model: s...