feat(send_message,agents): live_fallback_mode + cueapi_create_agent w/ parent_agent_id — agent-id-split refactor port#37
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…/ parent_agent_id (agent-id-split refactor 2026-05-12) Additive port of the agent-id-split substrate refactor. `cueapi_send_message`: - New optional field `live_fallback_mode: 'live_only' | 'fallback_to_background'` - Default-omit on wire when value matches the substrate default (`fallback_to_background`); pre-refactor senders see unchanged wire format. Same default-omit shape as `mode: 'auto'`. `cueapi_create_agent` (NEW tool — additive write surface on agents): - display_name (required), slug, webhook_url, metadata, parent_agent_id - Mirrors cueapi-cli `agents create --parent-agent-id` (#56) and the substrate POST /v1/agents schema. - `parent_agent_id` is the new FK field for the agent-id-split refactor: pass the BG sibling's id when creating a Live sibling so substrate can fall back from Live to BG via this link when the Live session is silent. - Historical "agents are read-only via MCP" stance lifted only for create (the workflow that needs `parent_agent_id` exposed); update and delete remain dashboard-only for now. 9 new tests (158/158 total pass): - live_fallback_mode default-omitted, explicit-default-omitted, live_only pass-through, Zod-enum rejects unknown - cueapi_create_agent: minimal POST → /v1/agents, parent_agent_id default-omit, parent_agent_id pass-through, webhook_url+metadata pass-through, display_name required (Zod gate) Substrate spec: - live_fallback_mode: Optional[Literal['live_only','fallback_to_background']] = 'fallback_to_background' - parent_agent_id: Optional[String] (FK to agents.id) Design Dock: https://trydock.ai/workspaces/agent-id-split-refactor-2026-05-12 Backlog: cmp2zi9tl001w04jxcxw3ank1 Part 2 of 3 in the Layer 4 SDK additive port (PR 1: cueapi-cli #56; PR 3 next: cueapi-action flag forwarding). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Summary
Additive port of the 2026-05-12 agent-id-split substrate refactor — one new field on
cueapi_send_message+ one new toolcueapi_create_agentwith the new FK exposed.Changes
cueapi_send_message—live_fallback_modeOptional enum
'live_only' | 'fallback_to_background'. Default-omit on the wire when value matches substrate default (fallback_to_background) so pre-refactor senders see unchanged wire format. Same default-omit shape asmode: 'auto'.fallback_to_background— substrate looks up the BG sibling viaparent_agent_idand routes there when the Live session is silent. Default.live_only— message queues against the Live agent until that specific Live session attaches.cueapi_create_agent(NEW tool)Additive write surface on agents. Mirrors
cueapi-cli agents create(#56) and substrate POST/v1/agents. Exposesparent_agent_idfrom day 1.Fields:
display_name(required)slug,webhook_url,metadata(optional, pass-through)parent_agent_id— optional FK to a parent (BG-sibling) agent for the agent-id-split refactorThe historical "agents are read-only via MCP" stance is lifted only for create — the workflow that needs
parent_agent_idexposed. Update and delete remain dashboard-only for now.Substrate contract pin
Design Dock: https://trydock.ai/workspaces/agent-id-split-refactor-2026-05-12
Tests (9 new, 158/158 passing)
live_fallback_mode:
mode: 'auto')live_onlypass-throughcueapi_create_agent:
/v1/agentsparent_agent_iddefault-omitparent_agent_idpass-through (Live-sibling create scenario)webhook_url+metadatapass-throughdisplay_namerequired (Zod gate)Layer 4 PR stack
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