{"version":"2.1.219","anchor":"subagent-delegation-nudges-can-now-be-suppressed-by-the-mode","canonical_anchor":"subagent-delegation-nudges-can-now-be-suppressed-by-the-mode","heading":"Subagent-delegation nudges can now be suppressed by the model itself","tier":"use","area":"System Prompt","scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.219\/e\/subagent-delegation-nudges-can-now-be-suppressed-by-the-mode","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.219","markdown":"### Subagent-delegation nudges can now be suppressed by the model itself\n\nSubagent delegation nudges are now switched off for Opus 5; you can also control them by env var.\n\n**What**\n\nThe prompt block that nudges Claude to delegate to subagents can be turned off based on the model, not just by env var, client data or remote config.\n\n**Details**\n\n- resolution order was env `CLAUDE_CODE_THISTLE_GREBE`, then client data, then growthbook; a fourth model-derived resolver was added\n- the model resolver returns `no_nudges` for models carrying the opus_5_prompt_bundle capability, suppressing the \"## Delegating to subagents\" block\n- telemetry reports `source: \"model\"` when this path decides\n\n**Evidence**\n\n`tengu_subagent_steer_applied`\n\n- Area: System Prompt\n- Names: `CLAUDE_CODE_THISTLE_GREBE`\n- Tier: Use it now\n- Useful: 3\/5\n- Signal: 0\/5"}