{"version":"2.0.1","anchor":"platform-aware-model-migration","canonical_anchor":"platform-aware-model-migration","heading":"Platform-Aware Model Migration","tier":null,"area":null,"scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.0.1\/e\/platform-aware-model-migration","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.0.1","markdown":"### Platform-Aware Model Migration\n\nThe Sonnet 4.5 model migration now intelligently skips execution for Bedrock and Vertex AI users, preserving their platform-specific model configurations.\n\n**What changed:**\n\n- Migration checks if you're using Bedrock (`CLAUDE_CODE_USE_BEDROCK`) or Vertex AI (`CLAUDE_CODE_USE_VERTEX`)\n- Third-party platform users skip the migration entirely, keeping their existing model settings\n- Only Anthropic API (firstParty) users have their model preferences reset\n\n**Why it matters:** Bedrock and Vertex have different model catalogs and naming conventions. This prevents the migration from breaking configurations on those platforms.\n\n**Evidence**\n\n`v4Q() at line 443591` with platform check via `k8() at line 351873`"}