{"version":"2.1.219","anchor":"managed-agents-docs-mid-session-system-message-model-gate-wi","canonical_anchor":"managed-agents-docs-mid-session-system-message-model-gate-wi","heading":"Managed-agents docs: mid-session system.message model gate widened, plus two path\/method typo fixes","tier":"notice","area":"Elsewhere","scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.219\/e\/managed-agents-docs-mid-session-system-message-model-gate-wi","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.219","markdown":"### Managed-agents docs: mid-session `system.message` model gate widened, plus two path\/method typo fixes\n\nMid-session system messages now work with more models, and two doc references were corrected.\n\n**What**\n\nThe documented model gate for mid-session system messages now covers more models, and two incorrect references were corrected.\n\n**Details**\n\n- The gate list adds the previous Opus alongside the new one, Sonnet, Fable and Mythos; the rejection error name is unchanged.\n- The polling troubleshooting note now names `GET \/v1\/sessions\/{id}\/events\/stream` as the endpoint you may have hit by mistake, where it previously named the paginated endpoint twice.\n- The overview's SDK advice corrects `session.events.list()` to `sessions.events.list()`.\n\n**Evidence**\n\n`model_does_not_support_mid_conversation_system`\n\n- Area: Elsewhere\n- Names: `sessions.events.list()`\n- Tier: You'll notice\n- Useful: 2\/5\n- Signal: 0\/5"}