{"version":"2.1.21","anchor":"deferred-tool-search-experiment-tengu-tst-kx7","canonical_anchor":"deferred-tool-search-experiment-tengu-tst-kx7","heading":"Deferred Tool Search Experiment (tengu_tst_kx7)","tier":null,"area":null,"scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.21\/e\/deferred-tool-search-experiment-tengu-tst-kx7","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.21","markdown":"### Deferred Tool Search Experiment (tengu_tst_kx7)\n\nAn A\/B test is running to evaluate enabling automatic tool search even when below the token threshold, if deferred tools are present in the context.\n\n**Details**\n\n- Feature flag: `tengu_tst_kx7` (controlled by GrowthBook)\n- Activates when: below normal tool search threshold BUT deferred tools exist\n- Hypothesis: Deferred tools signal potential tool use even at low token counts\n- Logs: `\"Tool search enabled via experiment (tengu_tst_kx7)\"` or `\"disabled via experiment\"`\n- Falls back silently if GrowthBook not ready: `\"tengu_tst_kx7: GrowthBook not ready, skipping\"`\n\n**Evidence**\n\nLine 451507 (experiment check, contains `V4(\"tengu_tst_kx7\", !1)` and `\"via experiment (tengu_tst_kx7): below threshold, deferred tools present\"`)"}