{"version":"2.1.251","anchor":"subagent-model-lookup-restructured-around-a-single-resolver","canonical_anchor":"subagent-model-lookup-restructured-around-a-single-resolver","heading":"Subagent model lookup restructured around a single resolver","tier":"internal","area":"Subagents","scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.251\/e\/subagent-model-lookup-restructured-around-a-single-resolver","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.251","markdown":"### Subagent model lookup restructured around a single resolver\n\nSubagent model inheritance runs through one resolver, with a Bedrock family mapping check added.\n\n**What**\n\nThe code deciding which model a subagent inherits was consolidated into one resolver, replacing the previous two-step flow, with an added check for Bedrock model family mapping before falling back.\n\n**Details**\n\n- The `CLAUDE_CODE_SUBAGENT_MODEL` environment variable is still honored.\n\n**Evidence**\n\n`CLAUDE_CODE_SUBAGENT_MODEL`\n\n- Area: Subagents\n- Tier: Under the hood\n- Useful: 2\/5\n- Signal: 2\/5"}