fix(worker): search_all_worker_traces 排除调用者自身的意图 trace

之前走 ActivityTraceSearch(nil) 会把 worker 自己这条意图的步骤也搜出来
(纯噪声，本就在其上下文里)。新增 ActivityTraceSearchExcluding(node_id<>x)，
工具传 t.ownerNode：worker=自身意图→排除自己；planner/mainagent 不受影响。

Co-Authored-By: Claude Opus 4.8 <[email protected]>

agent/tools.go

@@ -995,8 +995,9 @@ func (t *ToolSet) getWorkerTrace() actool.CoreTool {
 // summaries (≤100 chars), each tagged with its intent_id for follow-up drill-down.
 func (t *ToolSet) searchAllWorkerTraces() actool.CoreTool {
 	return readTool("search_all_worker_traces",
-		"在【本任务所有 work 的执行过程】里按关键字(q)检索——用于找回某个 worker 见过、却没写进 fact 的东西（某路径/token/报错等）。"+
-			"只返回命中步骤的摘要(summary≤100字)，每条带 intent_id；据此再用 get_worker_trace(intent_id, step_ids=[...]) 取完整内容。不含思考(thinking)步骤。",
+		"【通常不推荐使用，因为系统中已经给了大部分信息了】在【本任务其他 work 的执行过程】里按关键字(q)检索——用于找回某个 worker 见过、却没写进 fact 的东西（某路径/token/报错等）。"+
+			"已自动排除你自己这条意图的步骤（那些本就在你上下文里）。"+
+			"只返回命中步骤的摘要(summary≤100字)，每条带 intent_id；据此再用 get_worker_trace(intent_id, step_ids=[...]) 取完整内容。",
 		obj(map[string]any{
 			"q":     str("关键字（在所有 work 步骤的摘要+完整输出里搜）"),
 			"limit": intp("返回上限，默认 100（可选）"),
@@ -1010,7 +1011,8 @@ func (t *ToolSet) searchAllWorkerTraces() actool.CoreTool {
 			if strings.TrimSpace(a.Q) == "" {
 				return actool.Errorf("q 必填"), nil
 			}
-			acts, err := t.ts.ActivityTraceSearch(nil, a.Q, a.Limit)
+			// 排除调用者自身这条意图的步骤（worker 的自有 trace 已在其上下文里）。
+			acts, err := t.ts.ActivityTraceSearchExcluding(t.ownerNode, a.Q, a.Limit)
 			if err != nil {
 				return actool.Errorf(err.Error()), nil
 			}
@@ -1038,7 +1040,7 @@ func (t *ToolSet) searchAllWorkerTraces() actool.CoreTool {
 // no process to inspect).
 func (t *ToolSet) listWorkerTraces() actool.CoreTool {
 	return readTool("list_worker_traces",
-		"列出本任务里【已跑过的 work（意图）】索引：intent_id + 一句话方向(summary) + 状态。"+
+		"【通常不推荐使用，因为系统中已经给了大部分信息了】列出本任务里【已跑过的 work（意图）】索引：intent_id + 一句话方向(summary) + 状态。"+
 			"你(worker)看不到探索图，用它来发现有哪些 work 值得翻看——再用 get_worker_trace(intent_id) 看其步骤、get_worker_trace(intent_id, step_ids=[...]) 取详情。"+
 			"只列已执行的(running/done/exhausted/blocked/stopped)，不含还没跑的 open。注意：你的任务边界仍是你领到的那条意图，看别的 work 只为复用观察/避免重复劳动。",
 		obj(map[string]any{

db/exploration.go

@@ -615,6 +615,29 @@ AND (summary ILIKE $2 OR detail ILIKE $2) ORDER BY id LIMIT $3`, s.expID, like,
 	return scanTrace(rows)
 }
 
+// ActivityTraceSearchExcluding keyword-searches every node's steps in this
+// exploration EXCEPT one node's own (excludeNodeID) — so a worker's
+// search_all_worker_traces doesn't return its own in-progress trace (which is
+// already in its context). excludeNodeID<=0 → no exclusion (searches all nodes).
+func (s *ExplorationStore) ActivityTraceSearchExcluding(excludeNodeID int64, q string, limit int) ([]Activity, error) {
+	if excludeNodeID <= 0 {
+		return s.ActivityTraceSearch(nil, q, limit)
+	}
+	if limit <= 0 {
+		limit = 100
+	}
+	like := "%" + q + "%"
+	rows, err := s.db.Query(`SELECT `+traceCols+`
+FROM activity WHERE exploration_id=$1 AND node_id IS NOT NULL AND node_id <> $2
+AND kind NOT IN ('thinking','usage')
+AND (summary ILIKE $3 OR detail ILIKE $3) ORDER BY id LIMIT $4`, s.expID, excludeNodeID, like, limit)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	return scanTrace(rows)
+}
+
 // ActivityByIDs loads full detail for specific step ids (the trace drill-down),
 // scoped to this exploration. thinking rows are skipped (never returned, even if
 // their id is asked for). Order is ascending id, not the input order.