Agent skill that upgrades LLM code to Claude Opus 5.5, GPT-6, Gemini 3.8 without breaking prod. Fixes breaking changes, then proves it with tests and evals.
benchmarking gemini openai developer-tools cursor gpt codex ai-agents claude breaking-changes llm prompt-engineering llmops anthropic agent-skills claude-code model-migration llm-migration prompt-migration model-upgrade
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Updated
Oct 11, 2026 - Python