diff --git a/internal/httpmock/registry.go b/internal/httpmock/registry.go
index 2bdec941..ef32e45d 100644
--- a/internal/httpmock/registry.go
+++ b/internal/httpmock/registry.go
@@ -25,10 +25,26 @@ type Stub struct {
 	Headers     http.Header // optional full response headers (takes precedence over ContentType)
 	matched     bool
 
+	// BodyFilter (optional): match only when the captured request body satisfies
+	// this predicate. Used to disambiguate multiple stubs that share a URL.
+	BodyFilter func([]byte) bool
+
+	// OnMatch (optional): runs synchronously after the stub matches but before
+	// the response is composed. Used in tests to inject panics or count
+	// in-flight goroutines.
+	OnMatch func(req *http.Request)
+
+	// Reusable (optional): when true, the stub stays available for further
+	// matches after the first hit. Each match appends to CapturedBodies.
+	Reusable bool
+
 	// CapturedHeaders records the request headers of the matched request.
 	// Populated after RoundTrip matches this stub.
 	CapturedHeaders http.Header
 	CapturedBody    []byte
+	// CapturedBodies records every captured request body when Reusable is set.
+	// (CapturedBody continues to record the most recent capture for back-compat.)
+	CapturedBodies [][]byte
 }
 
 // Registry records stubs and implements http.RoundTripper.
@@ -51,8 +67,43 @@ func (r *Registry) Register(s *Stub) {
 func (r *Registry) RoundTrip(req *http.Request) (*http.Response, error) {
 	urlStr := req.URL.String()
 
+	// Read body once up-front so BodyFilter can inspect it without consuming
+	// the original reader; restore for downstream consumers afterwards.
+	// http.RoundTripper requires us to close the original body.
+	var capturedBody []byte
+	if req.Body != nil {
+		var err error
+		capturedBody, err = io.ReadAll(req.Body)
+		_ = req.Body.Close()
+		if err != nil {
+			return nil, fmt.Errorf("httpmock: read request body: %w", err)
+		}
+		req.Body = io.NopCloser(bytes.NewReader(capturedBody))
+	}
+
+	matched := r.match(req, urlStr, capturedBody)
+
+	if matched != nil {
+		// Restore body again in case OnMatch wants to read it.
+		req.Body = io.NopCloser(bytes.NewReader(capturedBody))
+		if matched.OnMatch != nil {
+			matched.OnMatch(req)
+		}
+		resp, err := stubResponse(matched)
+		if err != nil {
+			return nil, fmt.Errorf("httpmock: stub %s %s: %w", matched.Method, matched.URL, err)
+		}
+		return resp, nil
+	}
+	return nil, fmt.Errorf("httpmock: no stub for %s %s", req.Method, req.URL)
+}
+
+// match selects the first stub whose Method/URL/BodyFilter all match the
+// request, mutates its capture state, and returns it. defer-Unlock guarantees
+// a panicking user-supplied BodyFilter cannot leak the mutex.
+func (r *Registry) match(req *http.Request, urlStr string, capturedBody []byte) *Stub {
 	r.mu.Lock()
-	var matched *Stub
+	defer r.mu.Unlock()
 	for _, s := range r.stubs {
 		if s.matched {
 			continue
@@ -63,25 +114,18 @@ func (r *Registry) RoundTrip(req *http.Request) (*http.Response, error) {
 		if s.URL != "" && !strings.Contains(urlStr, s.URL) {
 			continue
 		}
-		s.matched = true
+		if s.BodyFilter != nil && !s.BodyFilter(capturedBody) {
+			continue
+		}
+		if !s.Reusable {
+			s.matched = true
+		}
 		s.CapturedHeaders = req.Header.Clone()
-		if req.Body != nil {
-			s.CapturedBody, _ = io.ReadAll(req.Body)
-			req.Body = io.NopCloser(bytes.NewReader(s.CapturedBody))
-		}
-		matched = s
-		break
+		s.CapturedBody = capturedBody
+		s.CapturedBodies = append(s.CapturedBodies, capturedBody)
+		return s
 	}
-	r.mu.Unlock()
-
-	if matched != nil {
-		resp, err := stubResponse(matched)
-		if err != nil {
-			return nil, fmt.Errorf("httpmock: stub %s %s: %w", matched.Method, matched.URL, err)
-		}
-		return resp, nil
-	}
-	return nil, fmt.Errorf("httpmock: no stub for %s %s", req.Method, req.URL)
+	return nil
 }
 
 // Verify asserts all stubs were matched.
@@ -90,9 +134,14 @@ func (r *Registry) Verify(t testing.TB) {
 	r.mu.Lock()
 	defer r.mu.Unlock()
 	for _, s := range r.stubs {
-		if !s.matched {
-			t.Errorf("httpmock: unmatched stub: %s %s", s.Method, s.URL)
+		if s.matched {
+			continue
 		}
+		// Reusable stubs never set s.matched; treat any captured hit as a match.
+		if s.Reusable && len(s.CapturedBodies) > 0 {
+			continue
+		}
+		t.Errorf("httpmock: unmatched stub: %s %s", s.Method, s.URL)
 	}
 }
 
diff --git a/internal/output/format.go b/internal/output/format.go
index a05a2ea1..7bb4088f 100644
--- a/internal/output/format.go
+++ b/internal/output/format.go
@@ -15,6 +15,7 @@ import (
 var knownArrayFields = []string{
 	"items", "files", "events", "rooms", "records", "nodes",
 	"members", "departments", "calendar_list", "acl_list", "freebusy_list",
+	"users",
 }
 
 // FindArrayField finds the primary array field in a response's data object.
diff --git a/shortcuts/contact/contact_search_user.go b/shortcuts/contact/contact_search_user.go
index b5e72dc2..3aacce14 100644
--- a/shortcuts/contact/contact_search_user.go
+++ b/shortcuts/contact/contact_search_user.go
@@ -123,7 +123,7 @@ type searchUser struct {
 	P2PChatID       string   `json:"p2p_chat_id"`
 	HasChatted      bool     `json:"has_chatted"`
 	Department      string   `json:"department"`
-	Signature       string   `json:"signature"`
+	Signature       string   `json:"signature,omitempty"`
 	ChatRecencyHint string   `json:"chat_recency_hint"`
 	MatchSegments   []string `json:"match_segments"`
 }
@@ -150,18 +150,38 @@ var ContactSearchUser = common.Shortcut{
 		{Name: "left-organization", Type: "bool", Desc: "restrict to users who have left the organization (omit to disable; =false rejected)"},
 		{Name: "lang", Desc: "override locale for localized_name (e.g. zh_cn, en_us)"},
 		{Name: "page-size", Type: "int", Default: "20", Desc: "rows per request, 1-30"},
+		{Name: "queries", Desc: "comma-separated keywords searched in parallel; output is a flat users[] with matched_query plus a queries[] sidecar"},
 	},
 	Tips: []string{
-		"Keyword search: lark-cli contact +search-user --query 'alice' --format json",
-		"Look up by ID (or 'me' for self): lark-cli contact +search-user --user-ids 'ou_xxx,me' --format json",
-		"Filter-only enumeration — users you've chatted with: lark-cli contact +search-user --has-chatted --format json",
+		"Keyword search: lark-cli contact +search-user --query 'alice'",
+		"Look up by ID (or 'me' for self): lark-cli contact +search-user --user-ids 'ou_xxx,me'",
+		"Filter-only enumeration — users you've chatted with: lark-cli contact +search-user --has-chatted",
 		"Refine same-name hits: lark-cli contact +search-user --query '张三' --has-chatted --exclude-external-users",
+		"Multi-name fanout: lark-cli contact +search-user --queries 'alice,bob,张三'",
 		"open_id is the stable identifier for follow-up commands; on has_more=true add filters or tighten --query — there is no auto-pagination.",
 	},
 	Validate: func(ctx context.Context, runtime *common.RuntimeContext) error {
 		return validateSearchUser(runtime)
 	},
 	DryRun: func(ctx context.Context, runtime *common.RuntimeContext) *common.DryRunAPI {
+		if raw := strings.TrimSpace(runtime.Str("queries")); raw != "" {
+			queries := parseAndDedupQueries(raw)
+			filter, err := buildFanoutFilter(runtime)
+			if err != nil {
+				return common.NewDryRunAPI().Set("error", err.Error())
+			}
+			api := common.NewDryRunAPI()
+			for _, q := range queries {
+				body := &searchUserAPIRequest{Query: q}
+				if filter != nil {
+					body.Filter = filter
+				}
+				api.POST(searchUserURL).
+					Params(map[string]interface{}{"page_size": runtime.Int("page-size")}).
+					Body(body)
+			}
+			return api
+		}
 		body, err := buildSearchUserBody(runtime)
 		if err != nil {
 			return common.NewDryRunAPI().Set("error", err.Error())
@@ -175,6 +195,13 @@ var ContactSearchUser = common.Shortcut{
 }
 
 func executeSearchUser(ctx context.Context, runtime *common.RuntimeContext) error {
+	if strings.TrimSpace(runtime.Str("queries")) != "" {
+		return executeSearchUserFanout(ctx, runtime)
+	}
+	return executeSearchUserSingle(ctx, runtime)
+}
+
+func executeSearchUserSingle(ctx context.Context, runtime *common.RuntimeContext) error {
 	body, err := buildSearchUserBody(runtime)
 	if err != nil {
 		return err
@@ -347,10 +374,32 @@ func rowFromItem(item *searchUserAPIItem, lang string, brand core.LarkBrand) sea
 func validateSearchUser(runtime *common.RuntimeContext) error {
 	if !hasAnySearchInput(runtime) {
 		return common.FlagErrorf(
-			"specify at least one of --query, --user-ids, --has-chatted, --has-enterprise-email, --exclude-external-users, --left-organization",
+			"specify at least one of --query, --queries, --user-ids, --has-chatted, --has-enterprise-email, --exclude-external-users, --left-organization",
 		)
 	}
 
+	queriesRaw := strings.TrimSpace(runtime.Str("queries"))
+	if queriesRaw != "" {
+		if strings.TrimSpace(runtime.Str("query")) != "" {
+			return common.FlagErrorf("--query and --queries are mutually exclusive")
+		}
+		if strings.TrimSpace(runtime.Str("user-ids")) != "" {
+			return common.FlagErrorf("--user-ids and --queries are mutually exclusive")
+		}
+		queries := parseAndDedupQueries(queriesRaw)
+		if len(queries) == 0 {
+			return common.FlagErrorf("--queries: no valid query parsed from %q (separate entries with ',')", queriesRaw)
+		}
+		if len(queries) > maxFanoutQueries {
+			return common.FlagErrorf("--queries: must be at most %d entries (got %d)", maxFanoutQueries, len(queries))
+		}
+		for _, q := range queries {
+			if utf8.RuneCountInString(q) > maxSearchUserQueryChars {
+				return common.FlagErrorf("--queries: entry %q exceeds %d characters", q, maxSearchUserQueryChars)
+			}
+		}
+	}
+
 	if q := strings.TrimSpace(runtime.Str("query")); q != "" {
 		if utf8.RuneCountInString(q) > maxSearchUserQueryChars {
 			return common.FlagErrorf("--query: length must be between 1 and %d characters", maxSearchUserQueryChars)
@@ -399,6 +448,9 @@ func hasAnySearchInput(runtime *common.RuntimeContext) bool {
 	if strings.TrimSpace(runtime.Str("query")) != "" {
 		return true
 	}
+	if strings.TrimSpace(runtime.Str("queries")) != "" {
+		return true
+	}
 	if strings.TrimSpace(runtime.Str("user-ids")) != "" {
 		return true
 	}
diff --git a/shortcuts/contact/contact_search_user_fanout.go b/shortcuts/contact/contact_search_user_fanout.go
new file mode 100644
index 00000000..ec1d5e84
--- /dev/null
+++ b/shortcuts/contact/contact_search_user_fanout.go
@@ -0,0 +1,275 @@
+// Copyright (c) 2026 Lark Technologies Pte. Ltd.
+// SPDX-License-Identifier: MIT
+
+package contact
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"strconv"
+	"strings"
+	"sync"
+
+	"github.com/larksuite/cli/internal/output"
+	"github.com/larksuite/cli/shortcuts/common"
+	larkcore "github.com/larksuite/oapi-sdk-go/v3/core"
+)
+
+const (
+	maxFanoutQueries  = 20
+	fanoutConcurrency = 5
+)
+
+// parseAndDedupQueries splits the raw CSV, trims whitespace, drops empty
+// entries, and deduplicates case-sensitively while preserving first-occurrence
+// order.
+func parseAndDedupQueries(raw string) []string {
+	parts := common.SplitCSV(raw)
+	seen := make(map[string]bool, len(parts))
+	out := make([]string, 0, len(parts))
+	for _, p := range parts {
+		p = strings.TrimSpace(p)
+		if p == "" || seen[p] {
+			continue
+		}
+		seen[p] = true
+		out = append(out, p)
+	}
+	return out
+}
+
+type fanoutResult struct {
+	Index   int
+	Query   string
+	Users   []searchUser
+	HasMore bool
+	ErrMsg  string // empty = success
+	ErrCode int    // 0 = success or unknown; otherwise an HTTP status or Lark API code corresponding to the first error
+}
+
+// isFanoutSummaryFormat gates the per-fanout stderr summary line. Includes csv
+// because that summary lives on stderr and never corrupts the csv stream on
+// stdout — single-query mode keeps the narrower isHumanReadableFormat predicate
+// for its refine hint, so adding csv here doesn't regress that path.
+func isFanoutSummaryFormat(format string) bool {
+	return format == "pretty" || format == "table" || format == "csv"
+}
+
+// runOneQuery converts every failure mode (transport, HTTP status, parse,
+// API code) into an ErrMsg string instead of returning a Go error. The
+// fanout dispatcher (Task 6) relies on this so a single failed query never
+// short-circuits the remaining workers.
+func runOneQuery(ctx context.Context, runtime *common.RuntimeContext, index int, query string,
+	filter *searchUserAPIFilter) fanoutResult {
+	// Pre-check ctx so queued workers see cancellation before issuing a
+	// request; in-flight workers continue until DoAPI returns.
+	if err := ctx.Err(); err != nil {
+		return fanoutResult{Index: index, Query: query, ErrMsg: err.Error()}
+	}
+
+	body := &searchUserAPIRequest{Query: query}
+	if filter != nil {
+		body.Filter = filter
+	}
+
+	apiResp, err := runtime.DoAPI(&larkcore.ApiReq{
+		HttpMethod:  http.MethodPost,
+		ApiPath:     searchUserURL,
+		Body:        body,
+		QueryParams: larkcore.QueryParams{"page_size": []string{strconv.Itoa(runtime.Int("page-size"))}},
+	})
+	if err != nil {
+		return fanoutResult{Index: index, Query: query, ErrMsg: err.Error()}
+	}
+	if apiResp.StatusCode != http.StatusOK {
+		body := strings.TrimSpace(string(apiResp.RawBody))
+		const maxBody = 200
+		if len(body) > maxBody {
+			body = body[:maxBody] + "..."
+		}
+		msg := fmt.Sprintf("HTTP %d %s", apiResp.StatusCode, http.StatusText(apiResp.StatusCode))
+		if body != "" {
+			msg = fmt.Sprintf("%s: %s", msg, body)
+		}
+		return fanoutResult{Index: index, Query: query,
+			ErrMsg:  msg,
+			ErrCode: apiResp.StatusCode}
+	}
+
+	var resp searchUserAPIEnvelope
+	if err := json.Unmarshal(apiResp.RawBody, &resp); err != nil {
+		return fanoutResult{Index: index, Query: query,
+			ErrMsg: fmt.Sprintf("parse response failed: %v", err)}
+	}
+	if resp.Code != 0 {
+		return fanoutResult{Index: index, Query: query,
+			ErrMsg:  fmt.Sprintf("API %d: %s", resp.Code, resp.Msg),
+			ErrCode: resp.Code}
+	}
+
+	users, hasMore := projectUsers(resp.Data, runtime.Str("lang"), runtime.Config.Brand)
+	return fanoutResult{Index: index, Query: query, Users: users, HasMore: hasMore}
+}
+
+type fanoutUser struct {
+	searchUser
+	MatchedQuery string `json:"matched_query"`
+}
+
+type querySummary struct {
+	Query   string `json:"query"`
+	Error   string `json:"error,omitempty"`
+	HasMore bool   `json:"has_more"`
+}
+
+type fanoutResponse struct {
+	Users   []fanoutUser   `json:"users"`
+	Queries []querySummary `json:"queries"`
+}
+
+// buildFanoutResponse walks results by Index (input order), flattens users[]
+// with matched_query, lists every input in queries[] (including successes),
+// and returns an error only when every query failed. The error wraps the
+// first failing query's ErrMsg so the CLI exits non-zero on full failure.
+func buildFanoutResponse(queries []string, results []fanoutResult) (*fanoutResponse, error) {
+	indexed := make([]fanoutResult, len(queries))
+	for _, r := range results {
+		indexed[r.Index] = r
+	}
+
+	out := &fanoutResponse{
+		Users:   make([]fanoutUser, 0),
+		Queries: make([]querySummary, 0, len(queries)),
+	}
+	failed := 0
+	var firstErrMsg, firstErrQuery string
+	var firstErrCode int
+	for i, r := range indexed {
+		out.Queries = append(out.Queries, querySummary{
+			Query:   queries[i],
+			Error:   r.ErrMsg,
+			HasMore: r.HasMore,
+		})
+		if r.ErrMsg != "" {
+			failed++
+			if firstErrMsg == "" {
+				firstErrMsg = r.ErrMsg
+				firstErrQuery = queries[i]
+				firstErrCode = r.ErrCode
+			}
+			continue
+		}
+		for _, u := range r.Users {
+			out.Users = append(out.Users, fanoutUser{searchUser: u, MatchedQuery: queries[i]})
+		}
+	}
+	if failed == len(queries) && len(queries) > 0 {
+		msg := fmt.Sprintf("all %d queries failed; first: %s (query=%q)",
+			len(queries), firstErrMsg, firstErrQuery)
+		// Only the HTTP-status / Lark-API-code branches in runOneQuery populate
+		// ErrCode; transport, parse, panic, and ctx-canceled stay at 0. Code 0
+		// means success in the Lark protocol, so don't pretend it's an API error
+		// when we have nothing structured to report.
+		if firstErrCode != 0 {
+			return nil, output.ErrAPI(firstErrCode, msg, "")
+		}
+		return nil, output.ErrWithHint(output.ExitInternal, "fanout", msg, "")
+	}
+	return out, nil
+}
+
+func executeSearchUserFanout(ctx context.Context, runtime *common.RuntimeContext) error {
+	queries := parseAndDedupQueries(runtime.Str("queries"))
+
+	filter, err := buildFanoutFilter(runtime)
+	if err != nil {
+		return err
+	}
+
+	results := make([]fanoutResult, len(queries))
+	var wg sync.WaitGroup
+	sem := make(chan struct{}, fanoutConcurrency)
+
+	for i, q := range queries {
+		wg.Add(1)
+		sem <- struct{}{}
+		go func(i int, q string) {
+			defer wg.Done()
+			defer func() { <-sem }()
+			defer func() {
+				if r := recover(); r != nil {
+					results[i] = fanoutResult{
+						Index:  i,
+						Query:  q,
+						ErrMsg: fmt.Sprintf("internal error: %v", r),
+					}
+				}
+			}()
+			results[i] = runOneQuery(ctx, runtime, i, q, filter)
+		}(i, q)
+	}
+	wg.Wait()
+
+	resp, err := buildFanoutResponse(queries, results)
+	if err != nil {
+		return err
+	}
+
+	failed, hasMoreCount := 0, 0
+	for _, qs := range resp.Queries {
+		if qs.Error != "" {
+			failed++
+		}
+		if qs.HasMore {
+			hasMoreCount++
+		}
+	}
+
+	runtime.OutFormat(resp, &output.Meta{Count: len(resp.Users)}, func(w io.Writer) {
+		if len(resp.Users) == 0 {
+			fmt.Fprintln(w, "No users found.")
+			return
+		}
+		output.PrintTable(w, prettyFanoutUserRows(resp.Users))
+	})
+
+	if isFanoutSummaryFormat(runtime.Format) {
+		fmt.Fprintf(runtime.IO().ErrOut, "\n%d queries, %d total users; %d failed, %d with has_more\n",
+			len(queries), len(resp.Users), failed, hasMoreCount)
+	}
+	return nil
+}
+
+func buildFanoutFilter(runtime *common.RuntimeContext) (*searchUserAPIFilter, error) {
+	filter := &searchUserAPIFilter{}
+	hasFilter := false
+	for _, bf := range searchUserBoolFilters {
+		if runtime.Cmd.Flags().Changed(bf.Flag) && runtime.Bool(bf.Flag) {
+			bf.Apply(filter)
+			hasFilter = true
+		}
+	}
+	if !hasFilter {
+		return nil, nil
+	}
+	return filter, nil
+}
+
+func prettyFanoutUserRows(users []fanoutUser) []map[string]interface{} {
+	rows := make([]map[string]interface{}, 0, len(users))
+	for _, u := range users {
+		rows = append(rows, map[string]interface{}{
+			"matched_query":     u.MatchedQuery,
+			"localized_name":    u.LocalizedName,
+			"department":        common.TruncateStr(u.Department, 50),
+			"enterprise_email":  u.EnterpriseEmail,
+			"has_chatted":       u.HasChatted,
+			"chat_recency_hint": u.ChatRecencyHint,
+			"open_id":           u.OpenID,
+		})
+	}
+	return rows
+}
diff --git a/shortcuts/contact/contact_search_user_test.go b/shortcuts/contact/contact_search_user_test.go
index fc6b24b1..a3fd4e1a 100644
--- a/shortcuts/contact/contact_search_user_test.go
+++ b/shortcuts/contact/contact_search_user_test.go
@@ -5,10 +5,14 @@ package contact
 
 import (
 	"bytes"
+	"context"
 	"encoding/json"
 	"fmt"
+	"net/http"
 	"strings"
+	"sync/atomic"
 	"testing"
+	"time"
 	"unicode/utf8"
 
 	"github.com/larksuite/cli/internal/cmdutil"
@@ -620,6 +624,46 @@ func TestSearchUser_Integration_JSONStructuredFields(t *testing.T) {
 	}
 }
 
+// Most users have no signature; the field is omitempty so an empty value
+// must not appear at all in the JSON, not as "" — agents shouldn't have to
+// distinguish "absent" from "empty string".
+func TestSearchUser_Integration_EmptySignatureOmitted(t *testing.T) {
+	f, stdout, _, reg := cmdutil.TestFactory(t, searchUserDefaultConfig())
+	reg.Register(&httpmock.Stub{
+		Method: "POST", URL: "/open-apis/contact/v3/users/search",
+		Body: map[string]interface{}{
+			"code": 0, "msg": "ok",
+			"data": map[string]interface{}{
+				"items": []interface{}{
+					map[string]interface{}{
+						"id": "ou_a",
+						"meta_data": map[string]interface{}{
+							"i18n_names":   map[string]interface{}{"zh_cn": "无签名用户"},
+							"mail_address": "x@example.com",
+							"description":  "",
+						},
+					},
+				},
+				"has_more": false,
+			},
+		},
+	})
+
+	err := mountAndRun(t, ContactSearchUser, []string{"+search-user", "--query", "x", "--format", "json", "--as", "user"}, f, stdout)
+	if err != nil {
+		t.Fatalf("execute: %v", err)
+	}
+	var got map[string]interface{}
+	if err := json.Unmarshal(stdout.Bytes(), &got); err != nil {
+		t.Fatalf("json: %v\nstdout=%s", err, stdout.String())
+	}
+	users := got["data"].(map[string]interface{})["users"].([]interface{})
+	u := users[0].(map[string]interface{})
+	if _, present := u["signature"]; present {
+		t.Errorf(`signature must be absent (not "") when empty; got %v`, u["signature"])
+	}
+}
+
 func TestSearchUser_Integration_NDJSONHasNoRefineHint(t *testing.T) {
 	f, stdout, stderr, reg := cmdutil.TestFactory(t, searchUserDefaultConfig())
 	reg.Register(&httpmock.Stub{
@@ -808,6 +852,345 @@ func TestSearchUser_Integration_PageSizeFlowsToQuery(t *testing.T) {
 	reg.Verify(t)
 }
 
+func newSearchUserTestCommandWithQueries() *cobra.Command {
+	cmd := newSearchUserTestCommand()
+	cmd.Flags().String("queries", "", "")
+	return cmd
+}
+
+func TestValidateQueries_QueryAndQueriesMutex(t *testing.T) {
+	cmd := newSearchUserTestCommandWithQueries()
+	_ = cmd.Flags().Set("query", "alice")
+	_ = cmd.Flags().Set("queries", "bob,carol")
+	rt := common.TestNewRuntimeContext(cmd, searchUserDefaultConfig())
+	err := validateSearchUser(rt)
+	if err == nil || !strings.Contains(err.Error(), "--query and --queries are mutually exclusive") {
+		t.Fatalf("expected mutex error, got %v", err)
+	}
+}
+
+func TestValidateQueries_UserIDsAndQueriesMutex(t *testing.T) {
+	cmd := newSearchUserTestCommandWithQueries()
+	_ = cmd.Flags().Set("user-ids", "ou_a")
+	_ = cmd.Flags().Set("queries", "bob")
+	rt := common.TestNewRuntimeContext(cmd, searchUserDefaultConfig())
+	err := validateSearchUser(rt)
+	if err == nil || !strings.Contains(err.Error(), "--user-ids and --queries are mutually exclusive") {
+		t.Fatalf("expected mutex error, got %v", err)
+	}
+}
+
+func TestValidateQueries_AllSeparators_Errors(t *testing.T) {
+	for _, raw := range []string{",,,", " , , ", ","} {
+		cmd := newSearchUserTestCommandWithQueries()
+		_ = cmd.Flags().Set("queries", raw)
+		rt := common.TestNewRuntimeContext(cmd, searchUserDefaultConfig())
+		err := validateSearchUser(rt)
+		if err == nil || !strings.Contains(err.Error(), "no valid query parsed") {
+			t.Fatalf("raw=%q: expected 'no valid query parsed' error, got %v", raw, err)
+		}
+	}
+}
+
+func TestValidateQueries_OverLength_Errors(t *testing.T) {
+	cmd := newSearchUserTestCommandWithQueries()
+	long := strings.Repeat("a", 51)
+	_ = cmd.Flags().Set("queries", "short,"+long)
+	rt := common.TestNewRuntimeContext(cmd, searchUserDefaultConfig())
+	err := validateSearchUser(rt)
+	if err == nil || !strings.Contains(err.Error(), "exceeds 50 characters") {
+		t.Fatalf("expected length error mentioning 50, got %v", err)
+	}
+}
+
+func TestValidateQueries_Over20_Errors(t *testing.T) {
+	cmd := newSearchUserTestCommandWithQueries()
+	parts := make([]string, 21)
+	for i := range parts {
+		parts[i] = fmt.Sprintf("q%02d", i)
+	}
+	_ = cmd.Flags().Set("queries", strings.Join(parts, ","))
+	rt := common.TestNewRuntimeContext(cmd, searchUserDefaultConfig())
+	err := validateSearchUser(rt)
+	if err == nil || !strings.Contains(err.Error(), "must be at most 20 entries") {
+		t.Fatalf("expected 20-cap error, got %v", err)
+	}
+}
+
+func TestParseQueries_TrimAndSkipEmpty(t *testing.T) {
+	got := parseAndDedupQueries("a, ,b ,")
+	want := []string{"a", "b"}
+	if len(got) != len(want) || got[0] != want[0] || got[1] != want[1] {
+		t.Errorf("parseAndDedupQueries: got %v, want %v", got, want)
+	}
+}
+
+func TestParseQueries_DedupCaseSensitive(t *testing.T) {
+	got := parseAndDedupQueries("alice,Alice,alice")
+	want := []string{"alice", "Alice"}
+	if len(got) != 2 || got[0] != want[0] || got[1] != want[1] {
+		t.Errorf("got %v, want %v (case-sensitive dedup keeps first-occurrence order)", got, want)
+	}
+}
+
+func TestExecuteSingleQuery_OutputUnchanged(t *testing.T) {
+	f, stdout, _, reg := cmdutil.TestFactory(t, searchUserDefaultConfig())
+	reg.Register(searchUserStub())
+
+	err := mountAndRun(t, ContactSearchUser, []string{"+search-user", "--query", "张三", "--format", "json", "--as", "user"}, f, stdout)
+	if err != nil {
+		t.Fatalf("execute: %v", err)
+	}
+
+	var got map[string]interface{}
+	if err := json.Unmarshal(stdout.Bytes(), &got); err != nil {
+		t.Fatalf("json: %v", err)
+	}
+	data, _ := got["data"].(map[string]interface{})
+	if _, hasQueries := data["queries"]; hasQueries {
+		t.Errorf("single-query mode must NOT emit data.queries; got=%v", data)
+	}
+	users, _ := data["users"].([]interface{})
+	if len(users) != 1 {
+		t.Fatalf("users len = %d, want 1", len(users))
+	}
+	u, _ := users[0].(map[string]interface{})
+	if _, hasMatched := u["matched_query"]; hasMatched {
+		t.Errorf("single-query mode users[] must NOT carry matched_query; got=%v", u)
+	}
+	if _, hasTopHasMore := data["has_more"]; !hasTopHasMore {
+		t.Errorf("single-query mode must keep top-level data.has_more; data=%v", data)
+	}
+}
+
+// runOneQueryRuntime wires a Factory-backed RuntimeContext bound to the test
+// command's flag set, so runOneQuery can be exercised directly without going
+// through the cobra dispatcher. Mirrors what mountAndRun would build, minus
+// the parent-command plumbing the worker doesn't need.
+func runOneQueryRuntime(t *testing.T) (*common.RuntimeContext, *httpmock.Registry) {
+	t.Helper()
+	f, _, _, reg := cmdutil.TestFactory(t, searchUserDefaultConfig())
+	cmd := newSearchUserTestCommand()
+	rt := common.TestNewRuntimeContextForAPI(context.Background(), cmd, searchUserDefaultConfig(), f, core.AsUser)
+	return rt, reg
+}
+
+func TestRunOneQuery_Success(t *testing.T) {
+	rt, reg := runOneQueryRuntime(t)
+	reg.Register(searchUserStub())
+
+	got := runOneQuery(context.Background(), rt, 0, "张三", nil)
+	if got.ErrMsg != "" {
+		t.Fatalf("unexpected ErrMsg: %q", got.ErrMsg)
+	}
+	if got.Index != 0 || got.Query != "张三" {
+		t.Errorf("Index/Query mismatch: %+v", got)
+	}
+	if len(got.Users) != 1 || got.Users[0].OpenID != "ou_a" {
+		t.Errorf("Users mismatch: %+v", got.Users)
+	}
+	if got.HasMore {
+		t.Errorf("HasMore should be false")
+	}
+}
+
+func TestRunOneQuery_APINonZeroCode(t *testing.T) {
+	rt, reg := runOneQueryRuntime(t)
+	reg.Register(&httpmock.Stub{
+		Method: "POST",
+		URL:    searchUserURL,
+		Body:   map[string]interface{}{"code": 99991663, "msg": "rate limited"},
+	})
+
+	got := runOneQuery(context.Background(), rt, 3, "alice", nil)
+	if got.Index != 3 || got.Query != "alice" {
+		t.Errorf("Index/Query mismatch: %+v", got)
+	}
+	if got.ErrMsg != "API 99991663: rate limited" {
+		t.Errorf("ErrMsg = %q, want 'API 99991663: rate limited'", got.ErrMsg)
+	}
+	if got.Users != nil || got.HasMore {
+		t.Errorf("on error, Users/HasMore must be zero values; got %+v", got)
+	}
+}
+
+func TestRunOneQuery_HTTPNon200(t *testing.T) {
+	rt, reg := runOneQueryRuntime(t)
+	reg.Register(&httpmock.Stub{
+		Method: "POST",
+		URL:    searchUserURL,
+		Status: 503,
+		Body:   map[string]interface{}{"reason": "upstream_unavailable"},
+	})
+
+	got := runOneQuery(context.Background(), rt, 1, "bob", nil)
+	if !strings.HasPrefix(got.ErrMsg, "HTTP 503 Service Unavailable: ") {
+		t.Errorf("ErrMsg should start with status line; got %q", got.ErrMsg)
+	}
+	if !strings.Contains(got.ErrMsg, "upstream_unavailable") {
+		t.Errorf("ErrMsg should include response body for diagnosis; got %q", got.ErrMsg)
+	}
+	if got.ErrCode != 503 {
+		t.Errorf("ErrCode = %d, want 503", got.ErrCode)
+	}
+}
+
+func TestRunOneQuery_HTTPNon200_BodyTruncated(t *testing.T) {
+	rt, reg := runOneQueryRuntime(t)
+	long := strings.Repeat("x", 1000)
+	reg.Register(&httpmock.Stub{
+		Method: "POST",
+		URL:    searchUserURL,
+		Status: 500,
+		Body:   map[string]interface{}{"detail": long},
+	})
+
+	got := runOneQuery(context.Background(), rt, 0, "alice", nil)
+	if !strings.HasSuffix(got.ErrMsg, "...") {
+		t.Errorf("oversized body should be truncated with '...' suffix; got %q", got.ErrMsg)
+	}
+	if len(got.ErrMsg) > 300 {
+		t.Errorf("ErrMsg %d chars exceeds reasonable budget; got %q", len(got.ErrMsg), got.ErrMsg)
+	}
+}
+
+// SDK-level transport / envelope-unmarshal failures arrive as Go errors from
+// runtime.DoAPI; the worker converts them by calling err.Error() rather than
+// adding its own prefix, so the assertion here is "ErrMsg is non-empty and
+// preserves the underlying message" — the exact text comes from the SDK.
+func TestRunOneQuery_TransportError(t *testing.T) {
+	rt, reg := runOneQueryRuntime(t)
+	reg.Register(&httpmock.Stub{
+		Method:  "POST",
+		URL:     searchUserURL,
+		RawBody: []byte("{not-json"),
+	})
+
+	got := runOneQuery(context.Background(), rt, 2, "carol", nil)
+	if got.ErrMsg == "" {
+		t.Fatalf("expected non-empty ErrMsg for malformed body")
+	}
+	if got.Index != 2 || got.Query != "carol" {
+		t.Errorf("Index/Query mismatch: %+v", got)
+	}
+	if got.Users != nil || got.HasMore {
+		t.Errorf("on error, Users/HasMore must be zero values; got %+v", got)
+	}
+}
+
+func TestFanoutAssemble_OrderAndShape(t *testing.T) {
+	results := []fanoutResult{
+		{Index: 1, Query: "bob", Users: []searchUser{{OpenID: "ou_b"}}, HasMore: true},
+		{Index: 0, Query: "alice", Users: []searchUser{{OpenID: "ou_a1"}, {OpenID: "ou_a2"}}, HasMore: false},
+		{Index: 2, Query: "carol", ErrMsg: "API 1: nope"},
+	}
+	resp, err := buildFanoutResponse([]string{"alice", "bob", "carol"}, results)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if len(resp.Users) != 3 {
+		t.Fatalf("Users length: got %d, want 3 (carol failed → 0 users)", len(resp.Users))
+	}
+	if resp.Users[0].OpenID != "ou_a1" || resp.Users[0].MatchedQuery != "alice" {
+		t.Errorf("Users[0]: got %+v", resp.Users[0])
+	}
+	if resp.Users[1].OpenID != "ou_a2" || resp.Users[1].MatchedQuery != "alice" {
+		t.Errorf("Users[1]: got %+v", resp.Users[1])
+	}
+	if resp.Users[2].OpenID != "ou_b" || resp.Users[2].MatchedQuery != "bob" {
+		t.Errorf("Users[2]: got %+v", resp.Users[2])
+	}
+	if len(resp.Queries) != 3 {
+		t.Fatalf("Queries length: got %d, want 3 (full enumeration)", len(resp.Queries))
+	}
+	want := []querySummary{
+		{Query: "alice", Error: "", HasMore: false},
+		{Query: "bob", Error: "", HasMore: true},
+		{Query: "carol", Error: "API 1: nope", HasMore: false},
+	}
+	for i, w := range want {
+		if resp.Queries[i] != w {
+			t.Errorf("Queries[%d]: got %+v, want %+v", i, resp.Queries[i], w)
+		}
+	}
+}
+
+func TestFanoutAssemble_AllFailed_ReturnsError(t *testing.T) {
+	results := []fanoutResult{
+		{Index: 0, Query: "alice", ErrMsg: "API 99991663: rate limit"},
+		{Index: 1, Query: "bob", ErrMsg: "HTTP 500 Internal Server Error"},
+	}
+	_, err := buildFanoutResponse([]string{"alice", "bob"}, results)
+	if err == nil {
+		t.Fatalf("expected error when all queries failed")
+	}
+	if !strings.Contains(err.Error(), "rate limit") {
+		t.Errorf("expected first error (rate limit) to be returned; got %v", err)
+	}
+	// Document the count is part of the message — agents grep for it.
+	if !strings.Contains(err.Error(), "all 2 queries failed") {
+		t.Errorf("expected 'all 2 queries failed' substring; got %v", err)
+	}
+}
+
+// Codes from the first failure must propagate through output.ErrAPI so the
+// CLI's exit-code classifier sees the real signal (e.g., 99991663 rate limit)
+// instead of 0, which would mean "success" in the Lark protocol.
+func TestFanoutAssemble_AllFailed_PropagatesFirstCode(t *testing.T) {
+	results := []fanoutResult{
+		{Index: 0, Query: "alice", ErrMsg: "API 99991663: rate limit", ErrCode: 99991663},
+		{Index: 1, Query: "bob", ErrMsg: "HTTP 500", ErrCode: 500},
+	}
+	_, err := buildFanoutResponse([]string{"alice", "bob"}, results)
+	if err == nil {
+		t.Fatalf("expected error")
+	}
+	if !strings.Contains(err.Error(), "rate limit") {
+		t.Errorf("error should contain first ErrMsg; got %v", err)
+	}
+}
+
+func TestFanoutAssemble_PartialFailureOK(t *testing.T) {
+	results := []fanoutResult{
+		{Index: 0, Query: "alice", Users: []searchUser{{OpenID: "ou_a"}}},
+		{Index: 1, Query: "bob", ErrMsg: "API 5: not found"},
+	}
+	resp, err := buildFanoutResponse([]string{"alice", "bob"}, results)
+	if err != nil {
+		t.Fatalf("partial failure must NOT be a hard error; got %v", err)
+	}
+	if len(resp.Users) != 1 {
+		t.Errorf("Users: got %d, want 1", len(resp.Users))
+	}
+	if resp.Queries[1].Error != "API 5: not found" {
+		t.Errorf("Queries[1].Error: got %q", resp.Queries[1].Error)
+	}
+}
+
+func TestFanoutAssemble_NoTopLevelHasMore(t *testing.T) {
+	results := []fanoutResult{
+		{Index: 0, Query: "alice", HasMore: true},
+	}
+	resp, err := buildFanoutResponse([]string{"alice"}, results)
+	if err != nil {
+		t.Fatalf("unexpected: %v", err)
+	}
+	raw, _ := json.Marshal(resp)
+	var asMap map[string]interface{}
+	if err := json.Unmarshal(raw, &asMap); err != nil {
+		t.Fatalf("unmarshal: %v", err)
+	}
+	if _, ok := asMap["has_more"]; ok {
+		t.Errorf("fanoutResponse must not have top-level has_more; got %v", asMap)
+	}
+	if _, ok := asMap["users"]; !ok {
+		t.Errorf("fanoutResponse missing users")
+	}
+	if _, ok := asMap["queries"]; !ok {
+		t.Errorf("fanoutResponse missing queries")
+	}
+}
+
 // Verifies that with the auto-pagination flags removed, --page-all / --page-limit
 // are no longer accepted. cobra must reject the unknown flag at parse time —
 // no stub is registered because the command should never reach the API.
@@ -827,3 +1210,341 @@ func TestSearchUser_Integration_NoAutoPaginationFlags(t *testing.T) {
 		})
 	}
 }
+
+func TestFanout_FilterAppliedToEachQuery(t *testing.T) {
+	f, stdout, _, reg := cmdutil.TestFactory(t, searchUserDefaultConfig())
+	stub := &httpmock.Stub{
+		Method:   "POST",
+		URL:      "/open-apis/contact/v3/users/search",
+		Reusable: true,
+		Body: map[string]interface{}{"code": 0, "msg": "ok",
+			"data": map[string]interface{}{"items": []interface{}{}, "has_more": false}},
+	}
+	reg.Register(stub)
+
+	err := mountAndRun(t, ContactSearchUser, []string{
+		"+search-user", "--queries", "alice,bob", "--has-chatted",
+		"--format", "json", "--as", "user",
+	}, f, stdout)
+	if err != nil {
+		t.Fatalf("execute: %v", err)
+	}
+	if len(stub.CapturedBodies) < 2 {
+		t.Fatalf("expected ≥2 captured request bodies, got %d", len(stub.CapturedBodies))
+	}
+	bodyByQuery := map[string]map[string]interface{}{}
+	for i, raw := range stub.CapturedBodies {
+		var body map[string]interface{}
+		if err := json.Unmarshal(raw, &body); err != nil {
+			t.Fatalf("unmarshal req %d: %v", i, err)
+		}
+		bodyByQuery[body["query"].(string)] = body
+		filter, _ := body["filter"].(map[string]interface{})
+		if filter == nil || filter["has_contact"] != true {
+			t.Errorf("req %d (query=%v): expected filter.has_contact=true; got body=%v", i, body["query"], body)
+		}
+	}
+	if _, ok := bodyByQuery["alice"]; !ok {
+		t.Errorf("missing request for query=alice; captured=%v", bodyByQuery)
+	}
+	if _, ok := bodyByQuery["bob"]; !ok {
+		t.Errorf("missing request for query=bob; captured=%v", bodyByQuery)
+	}
+}
+
+func TestFanout_PartialFailure_ExitZero(t *testing.T) {
+	f, stdout, _, reg := cmdutil.TestFactory(t, searchUserDefaultConfig())
+	reg.Register(&httpmock.Stub{
+		Method: "POST", URL: "/open-apis/contact/v3/users/search",
+		BodyFilter: func(b []byte) bool { return strings.Contains(string(b), `"alice"`) },
+		Body: map[string]interface{}{"code": 0, "msg": "ok",
+			"data": map[string]interface{}{
+				"items":    []interface{}{map[string]interface{}{"id": "ou_a"}},
+				"has_more": false,
+			}},
+	})
+	reg.Register(&httpmock.Stub{
+		Method: "POST", URL: "/open-apis/contact/v3/users/search",
+		BodyFilter: func(b []byte) bool { return strings.Contains(string(b), `"bob"`) },
+		Status:     500,
+		Body:       map[string]interface{}{},
+	})
+	err := mountAndRun(t, ContactSearchUser, []string{
+		"+search-user", "--queries", "alice,bob", "--format", "json", "--as", "user",
+	}, f, stdout)
+	if err != nil {
+		t.Fatalf("partial failure should NOT propagate as error; got %v", err)
+	}
+
+	var got map[string]interface{}
+	if err := json.Unmarshal(stdout.Bytes(), &got); err != nil {
+		t.Fatalf("json: %v\nstdout=%s", err, stdout.String())
+	}
+	data := got["data"].(map[string]interface{})
+	users := data["users"].([]interface{})
+	if len(users) != 1 {
+		t.Errorf("users: expected 1 (alice), got %d; stdout=%s", len(users), stdout.String())
+	}
+	queries := data["queries"].([]interface{})
+	if len(queries) != 2 {
+		t.Fatalf("queries: expected 2, got %d", len(queries))
+	}
+	q1 := queries[1].(map[string]interface{})
+	if !strings.HasPrefix(q1["error"].(string), "HTTP 500") {
+		t.Errorf("queries[1].error: got %q", q1["error"])
+	}
+}
+
+func TestFanout_AllFailed_ExitNonZero(t *testing.T) {
+	f, stdout, _, reg := cmdutil.TestFactory(t, searchUserDefaultConfig())
+	reg.Register(&httpmock.Stub{
+		Method: "POST", URL: "/open-apis/contact/v3/users/search",
+		Reusable: true,
+		Status:   500, Body: map[string]interface{}{"reason": "boom"},
+	})
+	err := mountAndRun(t, ContactSearchUser, []string{
+		"+search-user", "--queries", "alice,bob", "--format", "json", "--as", "user",
+	}, f, stdout)
+	if err == nil {
+		t.Fatalf("expected error when all queries failed")
+	}
+	// First failure's HTTP code (500) and a digestible reason must propagate
+	// so agents can classify (vs. a generic ExitInternal masking the upstream).
+	msg := err.Error()
+	if !strings.Contains(msg, "500") {
+		t.Errorf("error must propagate first failure's HTTP 500 code; got %q", msg)
+	}
+	if !strings.Contains(msg, "all 2 queries failed") {
+		t.Errorf("error must indicate the all-failed mode; got %q", msg)
+	}
+}
+
+func TestFanout_ConcurrencyLimitFive(t *testing.T) {
+	f, stdout, _, reg := cmdutil.TestFactory(t, searchUserDefaultConfig())
+
+	var inFlight, peak int32
+	reg.Register(&httpmock.Stub{
+		Method:   "POST",
+		URL:      "/open-apis/contact/v3/users/search",
+		Reusable: true,
+		OnMatch: func(req *http.Request) {
+			cur := atomic.AddInt32(&inFlight, 1)
+			defer atomic.AddInt32(&inFlight, -1)
+			for {
+				p := atomic.LoadInt32(&peak)
+				if cur <= p || atomic.CompareAndSwapInt32(&peak, p, cur) {
+					break
+				}
+			}
+			time.Sleep(50 * time.Millisecond)
+		},
+		Body: map[string]interface{}{"code": 0, "msg": "ok",
+			"data": map[string]interface{}{"items": []interface{}{}, "has_more": false}},
+	})
+
+	queries := []string{"a", "b", "c", "d", "e", "f", "g", "h", "i", "j"}
+	err := mountAndRun(t, ContactSearchUser, []string{
+		"+search-user", "--queries", strings.Join(queries, ","),
+		"--format", "json", "--as", "user",
+	}, f, stdout)
+	if err != nil {
+		t.Fatalf("execute: %v", err)
+	}
+	if peak > 5 {
+		t.Errorf("concurrency peak = %d, want ≤ 5", peak)
+	}
+	if peak < 2 {
+		t.Errorf("concurrency peak = %d, want ≥ 2 (test should observe parallelism)", peak)
+	}
+}
+
+func TestFanout_PanicRecovery(t *testing.T) {
+	f, stdout, stderr, reg := cmdutil.TestFactory(t, searchUserDefaultConfig())
+
+	reg.Register(&httpmock.Stub{
+		Method: "POST", URL: "/open-apis/contact/v3/users/search",
+		BodyFilter: func(b []byte) bool { return strings.Contains(string(b), `"boom"`) },
+		OnMatch: func(req *http.Request) {
+			panic("synthetic test panic")
+		},
+		Body: map[string]interface{}{},
+	})
+	reg.Register(&httpmock.Stub{
+		Method:   "POST",
+		URL:      "/open-apis/contact/v3/users/search",
+		Reusable: true,
+		Body: map[string]interface{}{"code": 0, "msg": "ok",
+			"data": map[string]interface{}{"items": []interface{}{}, "has_more": false}},
+	})
+
+	err := mountAndRun(t, ContactSearchUser, []string{
+		"+search-user", "--queries", "ok,boom,fine", "--format", "json", "--as", "user",
+	}, f, stdout)
+	if err != nil {
+		t.Fatalf("partial panic must not bubble; got %v", err)
+	}
+	var got map[string]interface{}
+	_ = json.Unmarshal(stdout.Bytes(), &got)
+	queries := got["data"].(map[string]interface{})["queries"].([]interface{})
+	q1 := queries[1].(map[string]interface{})
+	if !strings.HasPrefix(q1["error"].(string), "internal error:") {
+		t.Errorf("queries[1].error: expected 'internal error:' prefix, got %q", q1["error"])
+	}
+	for _, marker := range []string{"goroutine ", ".go:", "runtime."} {
+		if strings.Contains(stderr.String(), marker) {
+			t.Errorf("stderr leaked stack-trace marker %q; got=%s", marker, stderr.String())
+		}
+	}
+}
+
+func TestFanout_MatchedQueryFidelity(t *testing.T) {
+	f, stdout, _, reg := cmdutil.TestFactory(t, searchUserDefaultConfig())
+	reg.Register(&httpmock.Stub{
+		Method:   "POST",
+		URL:      "/open-apis/contact/v3/users/search",
+		Reusable: true,
+		Body: map[string]interface{}{"code": 0, "msg": "ok",
+			"data": map[string]interface{}{
+				"items":    []interface{}{map[string]interface{}{"id": "ou_x"}},
+				"has_more": false,
+			}},
+	})
+	err := mountAndRun(t, ContactSearchUser, []string{
+		"+search-user", "--queries", "张三,Alice 王", "--format", "json", "--as", "user",
+	}, f, stdout)
+	if err != nil {
+		t.Fatalf("execute: %v", err)
+	}
+	var got map[string]interface{}
+	_ = json.Unmarshal(stdout.Bytes(), &got)
+	users := got["data"].(map[string]interface{})["users"].([]interface{})
+	if len(users) != 2 {
+		t.Fatalf("users: got %d, want 2", len(users))
+	}
+	want := []string{"张三", "Alice 王"}
+	for i, w := range want {
+		mq := users[i].(map[string]interface{})["matched_query"]
+		if mq != w {
+			t.Errorf("users[%d].matched_query: got %v, want %q (must be original input verbatim)", i, mq, w)
+		}
+	}
+}
+
+func TestFanout_NDJSONStdoutClean(t *testing.T) {
+	f, stdout, stderr, reg := cmdutil.TestFactory(t, searchUserDefaultConfig())
+	reg.Register(&httpmock.Stub{
+		Method:   "POST",
+		URL:      "/open-apis/contact/v3/users/search",
+		Reusable: true,
+		Body: map[string]interface{}{"code": 0, "msg": "ok",
+			"data": map[string]interface{}{
+				"items":    []interface{}{map[string]interface{}{"id": "ou_a"}},
+				"has_more": false,
+			}},
+	})
+	err := mountAndRun(t, ContactSearchUser, []string{
+		"+search-user", "--queries", "a,a,b", "--format", "ndjson", "--as", "user",
+	}, f, stdout)
+	if err != nil {
+		t.Fatalf("execute: %v", err)
+	}
+	for _, marker := range []string{"queries,", "total users", "with has_more"} {
+		if strings.Contains(stdout.String(), marker) {
+			t.Errorf("ndjson stdout must not contain %q; got=%q", marker, stdout.String())
+		}
+	}
+	_ = stderr
+}
+
+func TestFanout_CSVHasMatchedQueryColumn(t *testing.T) {
+	f, stdout, stderr, reg := cmdutil.TestFactory(t, searchUserDefaultConfig())
+	reg.Register(&httpmock.Stub{
+		Method:   "POST",
+		URL:      "/open-apis/contact/v3/users/search",
+		Reusable: true,
+		Body: map[string]interface{}{"code": 0, "msg": "ok",
+			"data": map[string]interface{}{
+				"items":    []interface{}{map[string]interface{}{"id": "ou_a"}},
+				"has_more": false,
+			}},
+	})
+	err := mountAndRun(t, ContactSearchUser, []string{
+		"+search-user", "--queries", "alice,bob", "--format", "csv", "--as", "user",
+	}, f, stdout)
+	if err != nil {
+		t.Fatalf("execute: %v", err)
+	}
+	if !strings.Contains(stdout.String(), "matched_query") {
+		t.Errorf("csv stdout must include matched_query column; got=%q", stdout.String())
+	}
+	if !strings.Contains(stderr.String(), "queries") || !strings.Contains(stderr.String(), "total users") {
+		t.Errorf("csv summary should land on stderr; got=%q", stderr.String())
+	}
+}
+
+func TestFanout_DryRun(t *testing.T) {
+	f, stdout, _, _ := cmdutil.TestFactory(t, searchUserDefaultConfig())
+
+	err := mountAndRun(t, ContactSearchUser, []string{
+		"+search-user", "--queries", "alice,bob", "--has-chatted", "--dry-run", "--as", "user",
+	}, f, stdout)
+	if err != nil {
+		t.Fatalf("execute: %v", err)
+	}
+	out := stdout.String()
+	for _, want := range []string{"alice", "bob", "POST", "/contact/v3/users/search", "has_contact"} {
+		if !strings.Contains(out, want) {
+			t.Errorf("dry-run output missing %q; got=%q", want, out)
+		}
+	}
+	// One DryRunAPI description per query.
+	if strings.Count(out, "/contact/v3/users/search") < 2 {
+		t.Errorf("dry-run should describe ≥2 API calls (one per query); got=%q", out)
+	}
+}
+
+// Spec §7 promises single-query --query mode is "零变化". The fanout summary
+// hint was broadened to csv (good — stderr can carry it without corrupting
+// the csv stream on stdout); the single-query refine hint must NOT inherit
+// that broadening, since pre-fanout it only fired on pretty/table.
+func TestSearchUser_Integration_CSVSingleQueryNoRefineHint(t *testing.T) {
+	f, stdout, stderr, reg := cmdutil.TestFactory(t, searchUserDefaultConfig())
+	reg.Register(&httpmock.Stub{
+		Method: "POST", URL: "/open-apis/contact/v3/users/search",
+		Body: map[string]interface{}{
+			"code": 0, "msg": "ok",
+			"data": map[string]interface{}{
+				"items":      []interface{}{map[string]interface{}{"id": "ou_a"}},
+				"has_more":   true,
+				"page_token": "tok_next",
+			},
+		},
+	})
+	err := mountAndRun(t, ContactSearchUser, []string{"+search-user", "--query", "x", "--format", "csv", "--as", "user"}, f, stdout)
+	if err != nil {
+		t.Fatalf("execute: %v", err)
+	}
+	if strings.Contains(stderr.String(), "refine") {
+		t.Errorf("single-query --format csv must NOT emit the refine hint; got stderr=%q", stderr.String())
+	}
+}
+
+// A pre-canceled ctx must be observed by runOneQuery before it dispatches the
+// HTTP call. The error string is exactly "context canceled" because that's
+// what context.Context.Err().Error() returns — agents may grep for it.
+func TestRunOneQuery_CtxCanceledEarly(t *testing.T) {
+	rt, _ := runOneQueryRuntime(t)
+	// Deliberately register no stub: runOneQuery must short-circuit before
+	// touching the transport, so the absence of a stub is the assertion.
+
+	ctx, cancel := context.WithCancel(context.Background())
+	cancel()
+
+	got := runOneQuery(ctx, rt, 0, "alice", nil)
+	if got.ErrMsg != "context canceled" {
+		t.Errorf("ErrMsg: got %q, want %q", got.ErrMsg, "context canceled")
+	}
+	if got.Index != 0 || got.Query != "alice" {
+		t.Errorf("Index/Query mismatch: %+v", got)
+	}
+}
diff --git a/skills/lark-contact/references/lark-contact-search-user.md b/skills/lark-contact/references/lark-contact-search-user.md
index a7f692d0..ed346da4 100644
--- a/skills/lark-contact/references/lark-contact-search-user.md
+++ b/skills/lark-contact/references/lark-contact-search-user.md
@@ -12,13 +12,14 @@
 
 ## 关键 flag
 
-`--query` / `--user-ids` / 4 个 bool filter 至少传一个,否则报错。完整 flag 看 `lark-cli contact +search-user --help`。
+`--query` / `--queries` / `--user-ids` / bool filter 至少传一个。bool filter 显式传 `=false` 会报错——不传等于不过滤。
 
 | Flag | 作用 |
 |---|---|
-| `--query <text>` | 关键词(姓名 / 邮箱 / 手机号),≤ 64 rune |
-| `--user-ids <csv>` | open_id 列表,逗号分隔,≤ 100;支持 `me` 表示自己;与 `--query` 同传时把搜索范围限定在该集合 |
-| `--has-chatted` | 仅搜聊过天的(opt-in;**显式 `=false` 会被拒**,下同) |
+| `--query <text>` | 关键词(姓名 / 邮箱 / 手机号),≤ 50 rune |
+| `--queries <csv>` | 多个关键词并行搜,**最多 20 条**;与 `--query` / `--user-ids` 互斥;输出新 shape(见下) |
+| `--user-ids <csv>` | open_id 列表,≤ 100;支持 `me` 表示自己;与 `--query` 同传时把搜索范围限定在该集合 |
+| `--has-chatted` | 仅搜聊过天的 |
 | `--has-enterprise-email` | 仅搜有企业邮箱的 |
 | `--exclude-external-users` | 仅搜同租户(排除外部联系人) |
 | `--left-organization` | 仅搜已离职的 |
@@ -47,6 +48,30 @@ lark-cli contact +search-user --query "王" --exclude-external-users --has-enter
 lark-cli contact +search-user --has-chatted --left-organization
 ```
 
+## 批量并行查询 (fanout)
+
+一次查多个名字:
+
+```bash
+lark-cli contact +search-user --queries "Alice,Bob,张三"
+```
+
+- 每行 user 带 `matched_query`,标识来自哪个 query
+- `queries[]` 每个输入一条 `{query, error?, has_more}`,失败的有 `error`
+- 部分失败不影响其它 query;全部失败才 exit 非 0
+
+```bash
+# bool filter 对每个 query 都生效
+lark-cli contact +search-user --queries "Alice,Bob" --has-chatted
+
+# 与 --query / --user-ids 互斥
+lark-cli contact +search-user --queries "a" --query "b"   # ❌ exit 2
+```
+
+约束:
+- 最多 20 条; 每条 ≤ 50 字符
+- 重复条目静默去重;全空 csv (`,,,`) 报错
+
 ## 同名 disambiguation
 
 搜常见姓名常返回多条同名结果。后续操作若有副作用(发消息、邀请会议等),把候选列给用户挑;**不要擅自选**。
@@ -61,28 +86,39 @@ lark-cli contact +search-user --query "张三" \
 
 ## 注意事项
 
-- **不会自动翻页**。`has_more=true` 表示要 refine query,不是叫你翻页。
-- **bool filter 显式传 `=false` 会报错**:不传等于不过滤;启用就传 flag(不带值)。
+- **不会自动翻页**。`has_more=true` 表示需要 refine query。
 - **`--lang` 只影响输出展示名**,不影响匹配字段。
-- **`--query` 与 `--user-ids` 同时设**:`--user-ids` 进 `filter.user_ids`(限定搜索范围),`--query` 进顶层(关键字),按服务端 filter 语义在该 ID 集合内匹配;请求结构可 `--dry-run` 确认。
+- **`--query` 与 `--user-ids` 同时设**:`--user-ids` 限定搜索范围,`--query` 在该集合内匹配。
 
 ## 输出字段 contract
 
-`data.users[]` 的字段集合稳定,可直接 jq / 反序列化。跨租户用户(`is_cross_tenant=true`)按飞书可见性规则,业务字段可能为空字符串 —— 下游做空值兜底,不要当成"字段缺失"。
+跨租户用户(`is_cross_tenant=true`)的业务字段可能为空字符串,需做空值兜底。
 
 | 字段 | 类型 | 说明 | 跨租户 |
 |---|---|---|---|
-| `open_id` | string | 稳定标识,后续命令以此为准 | 始终非空 |
-| `localized_name` | string | 按 `--lang` / brand 选出的展示名;想换语言重查时传 `--lang en_us` 等 | 始终非空(兜底为 open_id) |
+| `open_id` | string | 稳定标识,后续命令的输入 | 始终非空 |
+| `localized_name` | string | 按 `--lang` / brand 选出的展示名 | 始终非空(兜底为 open_id) |
 | `email` | string | 个人邮箱 | 可能为空 |
 | `enterprise_email` | string | 企业邮箱 | 可能为空 |
 | `is_activated` | bool | 是否已激活飞书账号(未激活也可投递消息,但用户可能看不到) | 可能 false |
 | `is_cross_tenant` | bool | 是否跨租户用户(同公司=false,外部联系人=true) | — |
-| `p2p_chat_id` | string | 与当前用户的现有 P2P 会话 ID(`oc_...`);空表示从未私聊过。可作为任何接受 `--chat-id` 的 IM 命令的输入 | 可能为空 |
+| `p2p_chat_id` | string | 与当前用户的 P2P 会话 ID(`oc_...`);空表示从未私聊过。可作为接受 `--chat-id` 的 IM 命令的输入 | 可能为空 |
 | `has_chatted` | bool | `p2p_chat_id != ""` 的派生字段 | — |
 | `department` | string | 部门路径,服务端可能用 `-` 拼层级,层级数不固定。**按可子串匹配的字符串处理** | 可能为空 |
-| `signature` | string | 用户个性签名(API 原名 `description`,本 CLI 重命名以反映真实语义)。同名 disambiguation 时可作为辅助信号 | 可能为空 |
-| `chat_recency_hint` | string | 最近联系提示文案,如 `"Contacted 2 days ago"`;空表示无近期联系 | 可能为空 |
+| `signature` | string (optional) | 用户个性签名;空时字段不出现 | 可能不出现 |
+| `chat_recency_hint` | string | 最近联系的提示文案,仅供展示 | 可能为空 |
 | `match_segments` | string[] | 关键词命中的字符串片段,用于高亮展示;无命中则为空数组 | — |
 
-表中字段即本 shortcut 的输出契约,移除或改名按 breaking change 处理。
+### `--queries` 模式额外字段
+
+`data.users[]` 每条多 `matched_query` (string),指明本行来自哪个 query。
+
+`data.queries[]` 按输入顺序、dedup 后每个 query 一条:
+
+| 字段 | 类型 | 说明 |
+|---|---|---|
+| `query` | string | 该输入 |
+| `error` | string (optional) | 失败原因;成功时不出现 |
+| `has_more` | bool | 该 query 还有更多结果 |
+
+fanout 模式无顶层 `data.has_more`。