Migrating to Claude Opus 5.5: a cheat sheet for the API and Claude Code
Effort defaults, the four breaking changes, silent progress updates, and the prompt and CLAUDE.md lines worth changing when you move from Opus 5 to 5.5.
I build with AI, Laravel, and TypeScript for a living. This is where I write about what the tools change and where they fall short.
Effort defaults, the four breaking changes, silent progress updates, and the prompt and CLAUDE.md lines worth changing when you move from Opus 5 to 5.5.
My open-source Agent Skills bundle gives coding agents a shared story bible format — and a deterministic CLI that catches dead characters walking, payoffs before setups, and unfired Chekhov guns.
Meta's Muse, xAI's Grok Bot, and the open-source route (OpenClaw and Hermes Agent) are all fighting to be your always-on AI assistant. They disagree on who does the setup, whose model you get, and where your data lives.
Trimming your instruction file won't stop agents ignoring the rules. Compliance decays as the work proceeds, and only mechanical gates survive it.
GPT-5.6 Sol, Kimi K3, and Claude Opus 5 trade coding wins. An early comparison of capability, cost, availability, and agent workflows.
Skills like Caveman and tools like RTK save tokens, but their benchmarks rarely measure whether the agent still completes the work correctly.