Ramnique Singh b62ed6a2f4 feat(x): spawn-agent — run sub-agents as headless child turns ... Adds the agent-as-tool capability deferred in turn-runtime-design §29.2: a `spawn-agent` builtin that runs a sub-agent in its own standalone headless turn and returns its final answer to the parent. Multiple spawn calls in one assistant batch run concurrently (previous commit). - RequestedAgent is now a union: by-id (unchanged shape) | inline {name, instructions, model?, tools?}. Inline definitions persist verbatim in turn_created and resolve to the same immutable snapshot. - Agent resolution splits by variant: DispatchingAgentResolver narrows the union once; InlineAgentResolver materializes inline specs (builtin catalog validation, headless default profile when tools are omitted); RealAgentResolver keeps the by-id path byte-identical. The builtin→ToolDescriptor conversion is extracted to a shared helper. - The spawn handler (RealToolRegistry branch → runSpawnedAgent) runs the child via HeadlessAgentRunner on the parent's model by default, clamps the model-call budget at 20, cascades the parent's abort signal, and records {kind:"subagent", childTurnId} as durable tool progress — the only parent→child link; no parentTurnId is added to the schema. Task-level failures return as conversational isError results, never terminal. - Depth is capped at 1: both resolvers strip spawn-agent from children (inline always; by-id via the new subagent composition flag) and the handler refuses child-shaped parents outright. - Renderer: spawn-agent calls render as a SubAgentBlock — a collapsed status card that expands to the child's live transcript (CompactConversation over sessions:getTurn, polled at 1s while running; standalone child turns don't reach the session bus). - The BuiltinTools entry gives copilot (and other catalog-attached agents) the tool automatically; its execute is the degraded legacy path only, since the turn runtime intercepts builtin:spawn-agent. Schema note: RequestedAgent widened under schemaVersion 1 (pre-release) — requires wiping ~/.rowboat/storage. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>		2026-07-08 23:31:41 +05:30
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core	feat(x): spawn-agent — run sub-agents as headless child turns	2026-07-08 23:31:41 +05:30
shared	feat(x): spawn-agent — run sub-agents as headless child turns	2026-07-08 23:31:41 +05:30