feat(subagent): default continuable delegation to background

2026-08-11 19:28:32 +08:00
parent 43b66c0a74
commit 8344d64363
73 changed files with 491 additions and 286 deletions
@@ -31,12 +31,12 @@
 {"type":"step/end","seq":29,"time":1785730458520,"data":{"turn":1,"step":2}}
 {"type":"step/start","seq":30,"time":1785730458527,"data":{"turn":1,"step":3}}
 {"type":"assistant/chunk","seq":31,"time":1783950000029,"data":{"turn":1,"step":3,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
-{"type":"assistant/chunk","seq":32,"time":1783950000030,"data":{"turn":1,"step":3,"chunk":{"type":"tool-call-delta","index":0,"id":"advanced-direct-child","name":"subagent","argumentsDelta":"{\"description\":\"Check direct child\",\"prompt\":\"Reply with exactly DIRECT_CHILD_OK and nothing else.\"}"}}}
-{"type":"assistant/chunk","seq":33,"time":1785036891179,"data":{"turn":1,"step":3,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"advanced-direct-child","name":"subagent","arguments":"{\"description\":\"Check direct child\",\"prompt\":\"Reply with exactly DIRECT_CHILD_OK and nothing else.\"}"}}}}
+{"type":"assistant/chunk","seq":32,"time":1783950000030,"data":{"turn":1,"step":3,"chunk":{"type":"tool-call-delta","index":0,"id":"advanced-direct-child","name":"subagent","argumentsDelta":"{\"description\":\"Check direct child\",\"prompt\":\"Reply with exactly DIRECT_CHILD_OK and nothing else.\",\"run_in_background\":false}"}}}
+{"type":"assistant/chunk","seq":33,"time":1785036891179,"data":{"turn":1,"step":3,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"advanced-direct-child","name":"subagent","arguments":"{\"description\":\"Check direct child\",\"prompt\":\"Reply with exactly DIRECT_CHILD_OK and nothing else.\",\"run_in_background\":false}"}}}}
 {"type":"assistant/chunk","seq":34,"time":1785498801872,"data":{"turn":1,"step":3,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}
 {"type":"assistant/chunk","seq":35,"time":1785730458531,"data":{"turn":1,"step":3,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":36,"time":1785730458531,"data":{"turn":1,"step":3,"message":{"role":"assistant","content":[{"type":"tool-call","id":"advanced-direct-child","name":"subagent","arguments":"{\"description\":\"Check direct child\",\"prompt\":\"Reply with exactly DIRECT_CHILD_OK and nothing else.\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"51fe1d59-eebc-457b-a072-fe217546ff04"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[31,32,33,34,35],"surfaceOp":"append"}
-{"type":"tool/call","seq":37,"time":1785730458531,"data":{"turn":1,"step":3,"callId":"advanced-direct-child","name":"subagent","arguments":"{\"description\":\"Check direct child\",\"prompt\":\"Reply with exactly DIRECT_CHILD_OK and nothing else.\"}"}}
+{"type":"assistant/message","seq":36,"time":1785730458531,"data":{"turn":1,"step":3,"message":{"role":"assistant","content":[{"type":"tool-call","id":"advanced-direct-child","name":"subagent","arguments":"{\"description\":\"Check direct child\",\"prompt\":\"Reply with exactly DIRECT_CHILD_OK and nothing else.\",\"run_in_background\":false}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"51fe1d59-eebc-457b-a072-fe217546ff04"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[31,32,33,34,35],"surfaceOp":"append"}
+{"type":"tool/call","seq":37,"time":1785730458531,"data":{"turn":1,"step":3,"callId":"advanced-direct-child","name":"subagent","arguments":"{\"description\":\"Check direct child\",\"prompt\":\"Reply with exactly DIRECT_CHILD_OK and nothing else.\",\"run_in_background\":false}"}}
 {"type":"tool/result","seq":38,"time":1785730458562,"data":{"turn":1,"step":3,"message":{"source":{"kind":"tool","callId":"advanced-direct-child"},"content":[{"type":"tool-result","toolCallId":"advanced-direct-child","content":[{"type":"text","text":"DIRECT_CHILD_OK"}],"isError":false}],"role":"user","id":"09028579-5ae5-4d57-955e-02504f4dfc2a"}},"sourceEventSeqs":[37],"surfaceOp":"append"}
 {"type":"step/end","seq":39,"time":1785730458563,"data":{"turn":1,"step":3}}
 {"type":"step/start","seq":40,"time":1785730458572,"data":{"turn":1,"step":4}}
@@ -21,6 +21,8 @@ Use the workflow tool ONLY when the user explicitly asks for a workflow or for l

 Use the ralph tool ONLY when the direct human explicitly asks for a Ralph loop or fresh-agent iterative execution. Each Ralph round starts a fresh child with no conversation seed and uses the shared workspace as durable memory. Completion and blockers are worker reports, not independent evaluation. Use same-session goal tools for ordinary long-running objectives, and plain subagents or workflows for bounded delegation and fan-out.

+Use subagent's continuable background route by default. Start independent delegations together in one assistant message and continue useful work while they run. Set `run_in_background: false` only when you cannot take your next action without that subagent's result. When a background run settles, the runtime sends you a notice containing its outcome and any final assistant message.
+
 ## Writing code for run_code

 Pass `run_code` the body of an async TypeScript function (erasable syntax only — no `enum` or namespaces; type annotations are advisory, the code runs type-stripped). Inside the program:
@@ -132,16 +134,16 @@ interface ToolArgsMap {
    /** The exact skill name from the available skills list. */
    name: string;
  } & Record<string, JsonValue>;
-  /** Delegate a self-contained task to a subagent (a separate agent that works in its own context) and return its final result. Use this to offload focused, independent work — research, a scoped implementation, an analysis — so it does not consume this conversation's context. The subagent runs to completion and you receive only its final answer, not its intermediate steps. Give it a complete, standalone prompt: it does not see this conversation. Set `run_in_background: true` to start a background subagent that keeps its conversation: this call returns only its subagent id, and the subagent works on its own from there. You are told when it finishes, so never poll or wait on it; `send_message` sends it more work. */
+  /** Delegate a self-contained task to a subagent (a separate agent that works in its own context) to offload focused, independent work — research, a scoped implementation, an analysis — so it does not consume this conversation's context. The subagent returns its result, not its intermediate steps. Give it a complete, standalone prompt: it does not see this conversation. This tool uses its continuable background route by default and immediately returns a durable subagent id. When that run settles, the runtime sends the parent a notice containing its outcome and any final assistant message; `send_message` starts a later turn in the same child conversation. Set `run_in_background: false` to use a foreground run only when you must receive its result before taking your next action. */
  subagent: {
    /** A short (3-5 word) description of the delegated task, for display. */
    description: string;
    /** The complete, self-contained task for the subagent. It does not share this conversation's context, so include everything it needs. */
    prompt: string;
-    /** Run as a background subagent that keeps its conversation and return only its subagent id. This call does not wait for it; you are told when it finishes. Send it more work with send_message. */
+    /** Whether to use the continuable background route. Defaults to true. Set false to run in the foreground and wait only when your next action depends on its result. */
    run_in_background?: boolean;
  } & Record<string, JsonValue>;
-  /** Delegate a task to a subagent that inherits this conversation: a child agent seeded with all completed turns so far (it does not see the current in-flight turn), returning only its final result. Use this when the subtask builds on this conversation's context — a follow-up analysis, a review, a continuation — without consuming this conversation's context for the work itself. You receive only its final answer, not its intermediate steps. */
+  /** Delegate a task to a subagent that inherits this conversation: a child agent seeded with all completed turns so far (it does not see the current in-flight turn). Use this when the subtask builds on this conversation's context — a follow-up analysis, a review, a continuation — without consuming this conversation's context for the work itself. You receive its result, not its intermediate steps. This call waits for the subagent and returns its result. */
  subagent_fork: {
    /** A short (3-5 word) description of the delegated task, for display. */
    description: string;
@@ -309,7 +309,7 @@
    },
    {
      "name": "subagent",
-      "description": "Delegate a self-contained task to a subagent (a separate agent that works in its own context) and return its final result. Use this to offload focused, independent work — research, a scoped implementation, an analysis — so it does not consume this conversation's context. The subagent runs to completion and you receive only its final answer, not its intermediate steps. Give it a complete, standalone prompt: it does not see this conversation. Set `run_in_background: true` to start a background subagent that keeps its conversation: this call returns only its subagent id, and the subagent works on its own from there. You are told when it finishes, so never poll or wait on it; `send_message` sends it more work.",
+      "description": "Delegate a self-contained task to a subagent (a separate agent that works in its own context) to offload focused, independent work — research, a scoped implementation, an analysis — so it does not consume this conversation's context. The subagent returns its result, not its intermediate steps. Give it a complete, standalone prompt: it does not see this conversation. This tool uses its continuable background route by default and immediately returns a durable subagent id. When that run settles, the runtime sends the parent a notice containing its outcome and any final assistant message; `send_message` starts a later turn in the same child conversation. Set `run_in_background: false` to use a foreground run only when you must receive its result before taking your next action.",
      "parameters": {
        "type": "object",
        "properties": {
@@ -323,7 +323,7 @@
          },
          "run_in_background": {
            "type": "boolean",
-            "description": "Run as a background subagent that keeps its conversation and return only its subagent id. This call does not wait for it; you are told when it finishes. Send it more work with send_message."
+            "description": "Whether to use the continuable background route. Defaults to true. Set false to run in the foreground and wait only when your next action depends on its result."
          }
        },
        "required": [
@@ -334,7 +334,7 @@
    },
    {
      "name": "subagent_fork",
-      "description": "Delegate a task to a subagent that inherits this conversation: a child agent seeded with all completed turns so far (it does not see the current in-flight turn), returning only its final result. Use this when the subtask builds on this conversation's context — a follow-up analysis, a review, a continuation — without consuming this conversation's context for the work itself. You receive only its final answer, not its intermediate steps.",
+      "description": "Delegate a task to a subagent that inherits this conversation: a child agent seeded with all completed turns so far (it does not see the current in-flight turn). Use this when the subtask builds on this conversation's context — a follow-up analysis, a review, a continuation — without consuming this conversation's context for the work itself. You receive its result, not its intermediate steps. This call waits for the subagent and returns its result.",
      "parameters": {
        "type": "object",
        "properties": {