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The training workspace labels with routeSystem and routeGrammar, and it held its own copies. V-660 changed both. A retyped prompt drifts silently, which is the problem llm/check_prompt_parity.py exists for on the other side. Inert unless MAVEN_DUMP_PROMPT names a directory. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_013ptwopxyo3Z2kwFckHkLvN