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JevMade field notes / Configuration and migration guide

The Claude Opus 5.5 Setup Guide: How to Get Maximum Quality for Minimum Cost (Exact Config Inside)

A Claude Opus 5.5 migration checklist covering effort settings, prompt caching, response-block handling, API compatibility, and prompts for long-running coding agents.

Original by darkzodchiAgent workflowsX articleOriginal published Source reviewed

Before you dive in

What you’ll find in the original

  1. Start at medium effort and compare quality, latency, token usage, and cache reads on your own workload instead of carrying an old high-effort setting forward.
  2. Check thinking and tool-choice settings, computer-use tool versions, and response-block rendering before migrating an agent harness.
  3. Make the agent’s stopping conditions explicit, review subagent evidence, and keep human approval for destructive actions even when prompts encourage autonomous progress.
Worth knowing

This covers Claude, not Jev. Prices, model comparisons, compatibility details, and prompt effects are attributed to the author; check current Anthropic documentation and your own traces before adopting the configuration.