◉CLAUDE LABJP
●2.1.301 — Adds the vim % motion, LaTeX math rendering in the VS Code panel, and a retry-watchdog limit for usage-limit waits (10/15)●2.1.299 — Conversations over 200K tokens left idle about 54 minutes get compacted; MCP allow rules now match only the server they name●SONNET 4.5 — Retires on the Claude API on 11/30, 45 days left. Migrate to Sonnet 5.5●WINDOWS — Reports say hooks break silently only on Japanese-locale Windows; check the character encoding first●FAST MODE — Opus 5.5 fast mode is out of research preview and no longer needs the beta header (10/15)●NEW — I Put a Ten-Line Promise File at the To…●2.1.301 — Adds the vim % motion, LaTeX math rendering in the VS Code panel, and a retry-watchdog limit for usage-limit waits (10/15)●2.1.299 — Conversations over 200K tokens left idle about 54 minutes get compacted; MCP allow rules now match only the server they name●SONNET 4.5 — Retires on the Claude API on 11/30, 45 days left. Migrate to Sonnet 5.5●WINDOWS — Reports say hooks break silently only on Japanese-locale Windows; check the character encoding first●FAST MODE — Opus 5.5 fast mode is out of research preview and no longer needs the beta header (10/15)●NEW — I Put a Ten-Line Promise File at the To…
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claude-agent-sdk

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⬡ API & SDK/2026-05-07Advanced

Implementing the Transactional Outbox Pattern with Claude Agent SDK — Eliminating Lost Side Effects in Production

Stop the 'the row was inserted but the email never went out' class of bugs in Claude Agent SDK apps. A production-grade walkthrough of the Transactional Outbox pattern using Postgres and Cloudflare Queues.

⬡ API & SDK/2026-04-24Advanced

Shadow Mode with Claude Agent SDK — Measuring Agent Accuracy on Live Traffic Without Touching Users

You want to ship an AI agent to production, but you can't measure its real accuracy without exposing real users. Shadow mode solves that paradox. This guide shows how to run a Claude Agent SDK agent alongside your existing workflow, log the deltas, and promote it step by step.

⬡ API & SDK/2026-04-22Advanced

Implementing Progressive Delivery with the Claude Agent SDK: Canary, Feature Flags, and Automatic Rollback Patterns for Production

Production-grade patterns for safely rolling out AI agents built with the Claude Agent SDK. Combines canary traffic splitting, feature flags, and SLO-driven automatic rollback with runnable TypeScript/Hono implementation code.

⬡ API & SDK/2026-06-15Advanced

On the day the billing change took effect, I added per-stage cost metering to my headless runs

The June 15 billing change moved headless runs and agent delegation onto monthly credits. Here is a thin metering layer that records token usage per stage tag from response.usage and emits a daily cost report, with working code.

⬡ API & SDK/2026-06-14Advanced

Making Claude Agent SDK Tools Idempotent — Stopping Double Execution with Deterministic Keys and an Outbox

An implementation log for stopping a Claude Agent SDK retry or session resume from processing the same payment twice. Three patterns — deterministic idempotency keys, an outbox, and a lightweight wrapper — with runnable code and production metrics.

⬡ API & SDK/2026-05-08Advanced

Implementing the Saga Pattern in Claude Agent SDK — Compensating Transactions and Idempotency

A practical guide to building safe multi-step Claude Agent SDK workflows. We cover compensating transactions, idempotency keys, and partial-failure state recovery, all from patterns that have run in production.