◉CLAUDE LABJP
●2.1.296 — Sonnet 5.5 cache reads drop to $0.10/Mtok (was $0.20), and the MCP description limit rises to 4,096 characters●2.1.295 — Hooks gain onFailure: "block", so a failed or timed-out hook no longer lets the action through●SONNET 4.5 — Retires on the Claude API on 11/30, 51 days left. Migrate to Sonnet 5.5●Q&A — A long-running report: the console jumps back to the top of history whenever output is appended●HAIKU 5.5 — Code written for Haiku 4.5 hits a 400 error on budget_tokens●NEW — When first requests keep missing, hand over a one-page description of your work first●2.1.296 — Sonnet 5.5 cache reads drop to $0.10/Mtok (was $0.20), and the MCP description limit rises to 4,096 characters●2.1.295 — Hooks gain onFailure: "block", so a failed or timed-out hook no longer lets the action through●SONNET 4.5 — Retires on the Claude API on 11/30, 51 days left. Migrate to Sonnet 5.5●Q&A — A long-running report: the console jumps back to the top of history whenever output is appended●HAIKU 5.5 — Code written for Haiku 4.5 hits a 400 error on budget_tokens●NEW — When first requests keep missing, hand over a one-page description of your work first
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OpenTelemetry

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⟐ Claude Code/2026-04-29Advanced

Observability for Claude Code with OpenTelemetry — A Production-Grade Tracing Guide for Agentic Workflows

Trace Claude Code agent runs end to end with OpenTelemetry. Hook integration, per-tool spans, MCP propagation, cost attribution, and sampling patterns that survive thousands of runs per day.

⟐ Claude Code/2026-07-15Advanced

Choosing Dynamic Workflow Size and Effort From a Ledger, Not a Hunch

Dynamic Workflows went generally available, handing you the workflow size and effort dials. After a week of picking large and watching only the bill grow, here is how to turn Claude Code's OpenTelemetry console output into a ledger and assign size and effort per task type.

⬡ API & SDK/2026-05-29Advanced

Rewiring Claude API Observability with OpenTelemetry GenAI Conventions — A Design Memo for Model Migrations and Cost Audits

An implementation memo for rewiring production observability around Claude API to match the OpenTelemetry GenAI semantic conventions — span attributes, metrics, cost tracking, and model-migration replay — written from running this in indie services for six months.

⬡ API & SDK/2026-03-27Advanced

Building AI Application Observability with Claude API and OpenTelemetry

Learn how to integrate OpenTelemetry with your Claude API applications for unified tracing, metrics, and logging. Covers token usage visualization, latency monitoring, cost alerting, and distributed tracing for agent workflows.