diff --git a/agent/capture_usage_test.go b/agent/capture_usage_test.go
index c76f79c..5b6389c 100644
--- a/agent/capture_usage_test.go
+++ b/agent/capture_usage_test.go
@@ -19,6 +19,17 @@ func (p captureUsageProvider) Stream(ctx context.Context, _ llm.CompletionReques
 	return func(yield func(llm.StreamEvent, error) bool) { p.stream(ctx, yield) }
 }
 
+func (p captureUsageProvider) Complete(ctx context.Context, req llm.CompletionRequest) (llm.Message, string, llm.Usage, error) {
+	acc := llm.NewAccumulator()
+	for ev, err := range p.Stream(ctx, req) {
+		if err != nil {
+			return llm.Message{}, "", llm.Usage{}, err
+		}
+		acc.Add(ev)
+	}
+	return acc.Message(), acc.StopReason, acc.Usage, nil
+}
+
 func TestCaptureRunPersistsUsageOnProviderFailure(t *testing.T) {
 	wantErr := errors.New("provider failed after reporting usage")
 	provider := captureUsageProvider{stream: func(_ context.Context, yield func(llm.StreamEvent, error) bool) {
diff --git a/agent/chat.go b/agent/chat.go
index 41be93b..0f38582 100644
--- a/agent/chat.go
+++ b/agent/chat.go
@@ -6,13 +6,13 @@ import (
 	"path/filepath"
 	"time"
 
+	"github.com/Autumn-27/artex/db"
+	"github.com/Autumn-27/artex/guard"
 	"github.com/Autumn-27/norma/agentcore"
 	"github.com/Autumn-27/norma/llm"
 	"github.com/Autumn-27/norma/permission"
 	actool "github.com/Autumn-27/norma/tool"
 	"github.com/Autumn-27/norma/transcript"
-	"github.com/Autumn-27/artex/db"
-	"github.com/Autumn-27/artex/guard"
 )
 
 // ChatAgent is the generic, task-independent conversational runner behind the chat
@@ -22,21 +22,28 @@ import (
 // LS/Glob/Grep) plus whatever skills/MCP the key is made visible; NO pentest
 // graph/task context is injected (that stays exclusive to MainAgent).
 type ChatAgent struct {
-	prov        llm.Provider
-	model       string
-	workDir     string
-	tx          *transcript.Store
-	window      int
-	proxyAddr   string
-	proxyCACert string
-	webSearch   WebSearchOpts
-	guard       *guard.Guard // optional; nil disables intercept hooks for chat
+	prov           llm.Provider
+	model          string
+	workDir        string
+	tx             *transcript.Store
+	window         int
+	proxyAddr      string
+	proxyCACert    string
+	webSearch      WebSearchOpts
+	guard          *guard.Guard // optional; nil disables intercept hooks for chat
+	nonStreamingFn func() bool  // resolver: use non-streaming (Complete) path? (nil = streaming)
 }
 
 func NewChatAgent(prov llm.Provider, model, workDir string, tx *transcript.Store, window int) *ChatAgent {
 	return &ChatAgent{prov: prov, model: model, workDir: workDir, tx: tx, window: window}
 }
 
+// SetNonStreaming wires a resolver deciding whether chat runs use the
+// non-streaming model path (true = non-streaming). nil/unset = streaming.
+func (c *ChatAgent) SetNonStreaming(fn func() bool) { c.nonStreamingFn = fn }
+
+func (c *ChatAgent) nonStreaming() bool { return c.nonStreamingFn != nil && c.nonStreamingFn() }
+
 // SetProxy points the chat agent's WebFetch/Bash at the recording proxy plus the
 // CA cert it trusts (empty addr = direct). Kept for parity with the other agents.
 func (c *ChatAgent) SetProxy(addr, caCert string) { c.proxyAddr, c.proxyCACert = addr, caCert }
@@ -115,18 +122,19 @@ func (c *ChatAgent) Chat(ctx context.Context, agentKey, sessionID, message strin
 		BraveSearchAPIKey:  ws.BraveKey,
 		TavilySearchAPIKey: ws.TavilyKey,
 		WebSearchProxy:     ws.Proxy,
-		BashEnv:           proxyEnv(c.proxyAddr, c.proxyCACert), // Bash 子命令默认走代理+信任 CA
-		WorkingDir:        sessionWorkDir,
-		MaxTurns:          maxTurns,
-		MaxDuration:       maxDuration,
-		Compaction:        compactionConfig(c.window),
-		Todos:             actool.NewTodoStore(),
+		BashEnv:            proxyEnv(c.proxyAddr, c.proxyCACert), // Bash 子命令默认走代理+信任 CA
+		WorkingDir:         sessionWorkDir,
+		MaxTurns:           maxTurns,
+		MaxDuration:        maxDuration,
+		Compaction:         compactionConfig(c.window),
+		Todos:              actool.NewTodoStore(),
 		// large tool output spills to cmd-output/ under the session dir.
 		// 截断上限用 SDK 默认(tool.Capture 的 30000 字符)。
 		ToolOutputDir: filepath.Join(sessionWorkDir, "cmd-output"),
 		// 命中预算(步数)→ SDK 跑收尾:输出一句总结。Prompt 与收尾轮数按本 agent key 后台可编辑
 		// (自定义 agent 各自一份;留空/0 用通用默认:10 轮)。
-		Settlement: wrapupSettlement(agentKey, nil),
+		Settlement:   wrapupSettlement(agentKey, nil),
+		NonStreaming: c.nonStreaming(), // 该 profile 选非流式时走 Provider.Complete
 	}
 	if c.guard != nil {
 		opts.Hooks = c.guard.Hooks()
diff --git a/agent/goals.go b/agent/goals.go
index 388515a..b98e9fe 100644
--- a/agent/goals.go
+++ b/agent/goals.go
@@ -98,13 +98,13 @@ func DecomposeGoals(ctx context.Context, prov llm.Provider, dataDir, goalText, d
 	if prov == nil {
 		return nil
 	}
-	return DecomposeGoalsWithProvider(ctx, prov, dataDir, goalText, desc, as, ts, taskID, emit)
+	return DecomposeGoalsWithProvider(ctx, prov, dataDir, goalText, desc, as, ts, taskID, false, emit)
 }
 
 // DecomposeGoalsWithProvider is the task-runtime variant used when a task has an
 // ordered provider chain. It preserves the same tools and write behavior while
 // letting the caller own provider selection/failover.
-func DecomposeGoalsWithProvider(ctx context.Context, prov llm.Provider, dataDir, goalText, desc string, as *db.AssetStore, ts *db.ExplorationStore, taskID int64, emit func(db.Activity)) []GoalSpec {
+func DecomposeGoalsWithProvider(ctx context.Context, prov llm.Provider, dataDir, goalText, desc string, as *db.AssetStore, ts *db.ExplorationStore, taskID int64, nonStreaming bool, emit func(db.Activity)) []GoalSpec {
 	if prov == nil {
 		return nil
 	}
@@ -145,7 +145,8 @@ func DecomposeGoalsWithProvider(ctx context.Context, prov llm.Provider, dataDir,
 		PermissionMode:         acperm.ModeBypass,
 		DisableBackgroundTasks: true,
 		// 3 步(抽约束 → 登记范围 → 拆目标)各需一次工具调用,给足回合避免收尾前漏调 set_goals。
-		MaxTurns: 8,
+		MaxTurns:     8,
+		NonStreaming: nonStreaming, // 该 profile 选非流式时走 Provider.Complete
 	}, userMsg, captureEmit)
 	// set_goals persisted the goals directly; read them back so the caller sees what
 	// was written (empty slice ⇒ the LLM produced nothing ⇒ caller falls back).
diff --git a/agent/mainagent.go b/agent/mainagent.go
index 99531df..9c40eca 100644
--- a/agent/mainagent.go
+++ b/agent/mainagent.go
@@ -17,19 +17,26 @@ import (
 // (→planner) or direct high-priority intents (→frontier). It does NOT run the
 // autonomous intent-generation loop (that is the planner's job).
 type MainAgent struct {
-	prov        llm.Provider
-	model       string
-	tx          *transcript.Store // raw LLM conversation persistence (nil = off)
-	window      int               // context window in tokens (for compaction)
-	windowFn    func() int        // optional dynamic task-chain minimum
-	maxTurns    int               // max agent turns per run (0 = unlimited)
-	proxyAddr   string            // recording proxy for WebFetch (empty = direct)
-	proxyCACert string            // recording proxy's CA cert path (HTTPS verify)
-	webSearch   WebSearchOpts     // web_search tool backend selection (off by default)
-	workDir     string            // shared work dir (surfaced in prompt as artifact-output target)
-	steerWork   func(intentID int64, msg string) error // engine callback: steer a running work (nil = off)
+	prov           llm.Provider
+	model          string
+	tx             *transcript.Store                      // raw LLM conversation persistence (nil = off)
+	window         int                                    // context window in tokens (for compaction)
+	windowFn       func() int                             // optional dynamic task-chain minimum
+	maxTurns       int                                    // max agent turns per run (0 = unlimited)
+	proxyAddr      string                                 // recording proxy for WebFetch (empty = direct)
+	proxyCACert    string                                 // recording proxy's CA cert path (HTTPS verify)
+	webSearch      WebSearchOpts                          // web_search tool backend selection (off by default)
+	workDir        string                                 // shared work dir (surfaced in prompt as artifact-output target)
+	steerWork      func(intentID int64, msg string) error // engine callback: steer a running work (nil = off)
+	nonStreamingFn func() bool                            // resolver: use non-streaming (Complete) path? (nil = streaming)
 }
 
+// SetNonStreaming wires a resolver deciding whether runs use the non-streaming
+// model path (true = non-streaming). nil/unset = streaming (default).
+func (m *MainAgent) SetNonStreaming(fn func() bool) { m.nonStreamingFn = fn }
+
+func (m *MainAgent) nonStreaming() bool { return m.nonStreamingFn != nil && m.nonStreamingFn() }
+
 func NewMainAgent(prov llm.Provider, model, workDir string, tx *transcript.Store, window, maxTurns int) *MainAgent {
 	return &MainAgent{prov: prov, model: model, workDir: workDir, tx: tx, window: window, maxTurns: maxTurns}
 }
@@ -128,7 +135,8 @@ func (m *MainAgent) Chat(ctx context.Context, taskID int64, as *db.AssetStore, t
 		Compaction:         compactionConfig(m.compactionWindow()), // long chats stay within the window
 		Todos:              actool.NewTodoStore(),                  // 会话级临时待办（TodoWrite），纯规划用，退出即丢
 		// 命中预算(步数)→ SDK 跑收尾:向用户输出一句进展总结。Prompt 与收尾轮数可后台编辑(默认 10 轮)。
-		Settlement: wrapupSettlement("mainagent", nil),
+		Settlement:   wrapupSettlement("mainagent", nil),
+		NonStreaming: m.nonStreaming(), // 该 profile 选非流式时走 Provider.Complete
 	}
 	if m.tx != nil { // persist raw human↔AI conversation; one accumulating file per task
 		opts.Transcript = m.tx
diff --git a/agent/planner.go b/agent/planner.go
index dfacc91..01c1bb8 100644
--- a/agent/planner.go
+++ b/agent/planner.go
@@ -20,19 +20,20 @@ import (
 // assets, judges whether the task goal is met, and emits 0..N exploration intents
 // into the frontier. It is the sole intent generator.
 type Planner struct {
-	prov        llm.Provider
-	model       string
-	tx          *transcript.Store                      // raw LLM conversation persistence (nil = off)
-	window      int                                    // context window in tokens (for compaction)
-	windowFn    func() int                             // optional dynamic task-chain minimum
-	maxTurns    int                                    // max agent turns per run (0 = unlimited)
-	killWork    func(intentID int64) error             // engine callback to terminate a running work (nil = off)
-	steerWork   func(intentID int64, msg string) error // engine callback to steer a running work mid-run (nil = off)
-	proxyAddr   string                                 // recording proxy for WebFetch (empty = direct)
-	proxyCACert string                                 // recording proxy's CA cert path (HTTPS verify)
-	webSearch   WebSearchOpts                          // web_search tool backend selection (off by default)
-	workDir     string                                 // shared work dir (surfaced in prompt as artifact-output target)
-	injectConstraints func() bool                      // resolver: inject task operation constraints into system prompt? (nil = yes)
+	prov              llm.Provider
+	model             string
+	tx                *transcript.Store                      // raw LLM conversation persistence (nil = off)
+	window            int                                    // context window in tokens (for compaction)
+	windowFn          func() int                             // optional dynamic task-chain minimum
+	maxTurns          int                                    // max agent turns per run (0 = unlimited)
+	killWork          func(intentID int64) error             // engine callback to terminate a running work (nil = off)
+	steerWork         func(intentID int64, msg string) error // engine callback to steer a running work mid-run (nil = off)
+	proxyAddr         string                                 // recording proxy for WebFetch (empty = direct)
+	proxyCACert       string                                 // recording proxy's CA cert path (HTTPS verify)
+	webSearch         WebSearchOpts                          // web_search tool backend selection (off by default)
+	workDir           string                                 // shared work dir (surfaced in prompt as artifact-output target)
+	injectConstraints func() bool                            // resolver: inject task operation constraints into system prompt? (nil = yes)
+	nonStreamingFn    func() bool                            // resolver: use non-streaming (Complete) path? (nil = streaming)
 
 	// todos keeps ONE plan-scratchpad per task (keyed by exploration id) so the
 	// planner's multi-step plan survives across wake-ups — each Plan() is a fresh
@@ -48,6 +49,12 @@ func NewPlanner(prov llm.Provider, model, workDir string, tx *transcript.Store,
 
 func (p *Planner) SetCompactionWindowResolver(fn func() int) { p.windowFn = fn }
 
+// SetNonStreaming wires a resolver deciding whether runs use the non-streaming
+// model path (true = non-streaming). nil/unset = streaming (default).
+func (p *Planner) SetNonStreaming(fn func() bool) { p.nonStreamingFn = fn }
+
+func (p *Planner) nonStreaming() bool { return p.nonStreamingFn != nil && p.nonStreamingFn() }
+
 func (p *Planner) compactionWindow() int {
 	if p.windowFn != nil {
 		return p.windowFn()
@@ -353,7 +360,8 @@ func (p *Planner) Plan(ctx context.Context, taskID int64, as *db.AssetStore, ts
 		// 命中【本轮】步数预算→ SDK 跑收尾:把本轮已想清楚的结论落地(该派的 add_intent、
 		// 能证的 prove_goal、串行链记 TodoWrite),而非停止规划——planner 之后仍会被反复唤醒。
 		// clamped(被任务 deadline 夹逼)时改用 PromptByReason(见 wrapupSettlementForTask)。
-		Settlement: settle,
+		Settlement:   settle,
+		NonStreaming: p.nonStreaming(), // 该 profile 选非流式时走 Provider.Complete
 	}
 	if p.tx != nil { // persist raw LLM conversation; one accumulating file per task's planner
 		opts.Transcript = p.tx
diff --git a/agent/provider.go b/agent/provider.go
index 3a576e7..f14a37d 100644
--- a/agent/provider.go
+++ b/agent/provider.go
@@ -52,6 +52,11 @@ type Config struct {
 	//   "" = 不发送(默认); "low"/"medium"/"high"/"xhigh"/"max" = 对应强度.
 	//   OpenAI 映射为顶层 reasoning_effort;Anthropic 映射为 output_config.effort.
 	ReasoningEffort string
+	// Stream 控制该 profile 是否使用流式(SSE)接口。true(默认)= 流式;false = 真·
+	// 非流式(发 stream:false,一次性拿完整 JSON,走 Provider.Complete)。非流式可绕开
+	// 某些网关糟糕的 SSE 实现(空帧、思考字段丢帧),代价是失去运行中的实时进度/实时
+	// token 计数。映射为 agentcore.Options.NonStreaming = !Stream。
+	Stream bool
 }
 
 // compaction window resolution bounds (in K tokens). Below the floor the
@@ -117,6 +122,8 @@ func FromEnv() (Config, bool) {
 		BaseURL: os.Getenv("ARTEX_LLM_BASE_URL"),
 		Model:   os.Getenv("ARTEX_LLM_MODEL"),
 		Proxy:   strings.TrimSpace(os.Getenv("ARTEX_LLM_PROXY")),
+		// 默认流式;ARTEX_LLM_STREAM=false/0/off 显式关闭走非流式。
+		Stream: !isFalsy(os.Getenv("ARTEX_LLM_STREAM")),
 	}
 	switch prov {
 	case "openai":
@@ -148,6 +155,7 @@ func ConfigFrom(provider, model, baseURL, apiKey, proxy string) Config {
 		BaseURL: strings.TrimRight(strings.TrimSpace(baseURL), "/"),
 		APIKey:  strings.TrimSpace(apiKey),
 		Proxy:   strings.TrimSpace(proxy),
+		Stream:  true, // 默认流式;调用方按 profile 覆盖
 	}
 	switch strings.TrimSpace(provider) {
 	case "openai":
@@ -168,6 +176,16 @@ func ConfigFrom(provider, model, baseURL, apiKey, proxy string) Config {
 	return c
 }
 
+// isFalsy reports whether an env-var string explicitly requests "off". Empty or
+// unrecognized → false (so an unset var keeps the streaming default).
+func isFalsy(s string) bool {
+	switch strings.ToLower(strings.TrimSpace(s)) {
+	case "0", "false", "off", "no":
+		return true
+	}
+	return false
+}
+
 // Provider returns the short provider name ("anthropic"/"openai").
 func (c Config) Provider() string {
 	if c.Format == llm.FormatOpenAI {
@@ -343,6 +361,7 @@ func TestConnection(ctx context.Context, c Config) (time.Duration, error) {
 		PermissionMode: acperm.ModeBypass,
 		MaxTurns:       1,
 		MaxTokens:      8192,
+		NonStreaming:   !c.Stream, // 用该 profile 的真实收发模式做连接测试
 	}, "ping")
 	return time.Since(start), err
 }
diff --git a/agent/worker.go b/agent/worker.go
index f2e5ce8..b6c6e8c 100644
--- a/agent/worker.go
+++ b/agent/worker.go
@@ -62,8 +62,19 @@ type Worker struct {
 	// injected into the worker system prompt. Read per run so the settings toggle
 	// takes effect without rebuilding the agent. nil = inject (default).
 	injectConstraints func() bool
+	// nonStreamingFn resolves whether this run uses the non-streaming (Complete)
+	// path. Read per run so a profile/task toggle takes effect without rebuilding
+	// the agent. nil = streaming (default).
+	nonStreamingFn func() bool
 }
 
+// SetNonStreaming wires a resolver deciding whether runs use the non-streaming
+// model path (true = non-streaming). nil/unset = streaming (default). Read per
+// run so a profile or task-chain toggle takes effect without rebuilding.
+func (w *Worker) SetNonStreaming(fn func() bool) { w.nonStreamingFn = fn }
+
+func (w *Worker) nonStreaming() bool { return w.nonStreamingFn != nil && w.nonStreamingFn() }
+
 // SetConstraintInject wires a resolver deciding whether this task's operation
 // constraints get injected into the worker system prompt. nil = inject (default).
 func (w *Worker) SetConstraintInject(fn func() bool) { w.injectConstraints = fn }
@@ -337,6 +348,7 @@ func (w *Worker) Execute(ctx context.Context, name string, taskID int64, as *db.
 		ToolOutputDir: cmdOutDir(runDir),
 		Compaction:    compactionConfig(w.compactionWindow()), // long tool-heavy runs stay within the window
 		Todos:         actool.NewTodoStore(),                  // 会话级临时待办（TodoWrite），纯规划用，退出即丢
+		NonStreaming:  w.nonStreaming(),                       // 该 profile 选非流式时走 Provider.Complete
 	}
 	if hooks != nil { // typed-nil guard: only set when concrete (avoids harness panic)
 		opts.Hooks = hooks
diff --git a/db/config.go b/db/config.go
index 40684d6..410994a 100644
--- a/db/config.go
+++ b/db/config.go
@@ -39,18 +39,23 @@ type LLMProfile struct {
 	// usable when an agent/task binds it explicitly, it just never gets picked up
 	// as a fallback target.
 	PoolExclude bool `json:"pool_exclude"`
+	// Streaming selects the wire protocol: true (default) = streaming (SSE);
+	// false = real non-streaming (stream:false, single JSON response via
+	// Provider.Complete). Non-streaming sidesteps flaky gateway SSE at the cost of
+	// live in-run progress. Maps to agent.Config.Stream.
+	Streaming bool `json:"streaming"`
 }
 
 // profileCols is the read column list (hint variant, no api key) shared by the
 // list query; profileColsKey is the same with api_key for the single-row loads.
-const profileCols = `id,name,format,COALESCE(base_url,''),COALESCE(proxy,''),model,COALESCE(api_key_hint,''),rate_per_second,rate_per_minute,context_window_k,COALESCE(reasoning_effort,''),is_default,priority,pool_exclude,COALESCE(thinking_type,'')`
-const profileColsKey = `id,name,format,COALESCE(base_url,''),COALESCE(proxy,''),model,COALESCE(api_key,''),rate_per_second,rate_per_minute,context_window_k,COALESCE(reasoning_effort,''),is_default,priority,pool_exclude,COALESCE(thinking_type,'')`
+const profileCols = `id,name,format,COALESCE(base_url,''),COALESCE(proxy,''),model,COALESCE(api_key_hint,''),rate_per_second,rate_per_minute,context_window_k,COALESCE(reasoning_effort,''),is_default,priority,pool_exclude,COALESCE(thinking_type,''),COALESCE(streaming,true)`
+const profileColsKey = `id,name,format,COALESCE(base_url,''),COALESCE(proxy,''),model,COALESCE(api_key,''),rate_per_second,rate_per_minute,context_window_k,COALESCE(reasoning_effort,''),is_default,priority,pool_exclude,COALESCE(thinking_type,''),COALESCE(streaming,true)`
 
 // scanProfile reads one row in the profileCols / profileColsKey column order. The
 // 7th column lands in APIKeyHint or APIKey depending on which list the caller used.
 func scanProfile(sc interface{ Scan(...any) error }, into *string, p *LLMProfile) error {
 	return sc.Scan(&p.ID, &p.Name, &p.Format, &p.BaseURL, &p.Proxy, &p.Model, into,
-		&p.RatePerSecond, &p.RatePerMinute, &p.ContextWindowK, &p.ReasoningEffort, &p.IsDefault, &p.Priority, &p.PoolExclude, &p.ThinkingType)
+		&p.RatePerSecond, &p.RatePerMinute, &p.ContextWindowK, &p.ReasoningEffort, &p.IsDefault, &p.Priority, &p.PoolExclude, &p.ThinkingType, &p.Streaming)
 }
 
 func (d *DB) ListProfiles() ([]*LLMProfile, error) {
@@ -123,18 +128,18 @@ func (d *DB) SaveProfile(p *LLMProfile) (int64, error) {
 	}
 	if p.ID == 0 {
 		var id int64
-		err := d.QueryRow(`INSERT INTO llm_profiles(name,format,base_url,proxy,model,api_key,api_key_hint,rate_per_second,rate_per_minute,context_window_k,reasoning_effort,priority,pool_exclude,thinking_type)
-VALUES ($1,$2,NULLIF($3,''),NULLIF($4,''),$5,NULLIF($6,''),NULLIF($7,''),$8,$9,$10,$11,$12,$13,$14) RETURNING id`,
-			p.Name, p.Format, p.BaseURL, p.Proxy, p.Model, p.APIKey, hint, p.RatePerSecond, p.RatePerMinute, p.ContextWindowK, p.ReasoningEffort, p.Priority, p.PoolExclude, p.ThinkingType).Scan(&id)
+		err := d.QueryRow(`INSERT INTO llm_profiles(name,format,base_url,proxy,model,api_key,api_key_hint,rate_per_second,rate_per_minute,context_window_k,reasoning_effort,priority,pool_exclude,thinking_type,streaming)
+VALUES ($1,$2,NULLIF($3,''),NULLIF($4,''),$5,NULLIF($6,''),NULLIF($7,''),$8,$9,$10,$11,$12,$13,$14,$15) RETURNING id`,
+			p.Name, p.Format, p.BaseURL, p.Proxy, p.Model, p.APIKey, hint, p.RatePerSecond, p.RatePerMinute, p.ContextWindowK, p.ReasoningEffort, p.Priority, p.PoolExclude, p.ThinkingType, p.Streaming).Scan(&id)
 		return id, err
 	}
 	if p.APIKey == "" {
-		_, err := d.Exec(`UPDATE llm_profiles SET name=$1,format=$2,base_url=NULLIF($3,''),proxy=NULLIF($4,''),model=$5,rate_per_second=$6,rate_per_minute=$7,context_window_k=$8,reasoning_effort=$9,priority=$10,pool_exclude=$11,thinking_type=$12 WHERE id=$13`,
-			p.Name, p.Format, p.BaseURL, p.Proxy, p.Model, p.RatePerSecond, p.RatePerMinute, p.ContextWindowK, p.ReasoningEffort, p.Priority, p.PoolExclude, p.ThinkingType, p.ID)
+		_, err := d.Exec(`UPDATE llm_profiles SET name=$1,format=$2,base_url=NULLIF($3,''),proxy=NULLIF($4,''),model=$5,rate_per_second=$6,rate_per_minute=$7,context_window_k=$8,reasoning_effort=$9,priority=$10,pool_exclude=$11,thinking_type=$12,streaming=$13 WHERE id=$14`,
+			p.Name, p.Format, p.BaseURL, p.Proxy, p.Model, p.RatePerSecond, p.RatePerMinute, p.ContextWindowK, p.ReasoningEffort, p.Priority, p.PoolExclude, p.ThinkingType, p.Streaming, p.ID)
 		return p.ID, err
 	}
-	_, err := d.Exec(`UPDATE llm_profiles SET name=$1,format=$2,base_url=NULLIF($3,''),proxy=NULLIF($4,''),model=$5,api_key=$6,api_key_hint=$7,rate_per_second=$8,rate_per_minute=$9,context_window_k=$10,reasoning_effort=$11,priority=$12,pool_exclude=$13,thinking_type=$14 WHERE id=$15`,
-		p.Name, p.Format, p.BaseURL, p.Proxy, p.Model, p.APIKey, hint, p.RatePerSecond, p.RatePerMinute, p.ContextWindowK, p.ReasoningEffort, p.Priority, p.PoolExclude, p.ThinkingType, p.ID)
+	_, err := d.Exec(`UPDATE llm_profiles SET name=$1,format=$2,base_url=NULLIF($3,''),proxy=NULLIF($4,''),model=$5,api_key=$6,api_key_hint=$7,rate_per_second=$8,rate_per_minute=$9,context_window_k=$10,reasoning_effort=$11,priority=$12,pool_exclude=$13,thinking_type=$14,streaming=$15 WHERE id=$16`,
+		p.Name, p.Format, p.BaseURL, p.Proxy, p.Model, p.APIKey, hint, p.RatePerSecond, p.RatePerMinute, p.ContextWindowK, p.ReasoningEffort, p.Priority, p.PoolExclude, p.ThinkingType, p.Streaming, p.ID)
 	return p.ID, err
 }
 
diff --git a/db/schema.sql b/db/schema.sql
index b1a53fe..8875d83 100644
--- a/db/schema.sql
+++ b/db/schema.sql
@@ -303,6 +303,8 @@ CREATE TABLE IF NOT EXISTS llm_profiles (
     --   pool_exclude true=不作为故障转移目标(仍可被 agent/任务显式绑定使用)。
     priority         INTEGER NOT NULL DEFAULT 0,
     pool_exclude     BOOLEAN NOT NULL DEFAULT false,
+    -- streaming=true(默认)走流式 SSE；false 走真·非流式(stream:false，一次性 JSON)。
+    streaming        BOOLEAN NOT NULL DEFAULT true,
     created_at       TIMESTAMPTZ NOT NULL DEFAULT now(),
     updated_at       TIMESTAMPTZ NOT NULL DEFAULT now()
 );
@@ -313,6 +315,8 @@ CREATE TRIGGER trg_llm_upd BEFORE UPDATE ON llm_profiles
 -- 轮询顺位/排除标记；补旧库。默认 0 / false = 全部配置都参与轮询。
 ALTER TABLE llm_profiles ADD COLUMN IF NOT EXISTS priority     INTEGER NOT NULL DEFAULT 0;
 ALTER TABLE llm_profiles ADD COLUMN IF NOT EXISTS pool_exclude BOOLEAN NOT NULL DEFAULT false;
+-- 流式开关；补旧库。默认 true = 保持既有的流式行为，旧配置无感升级。
+ALTER TABLE llm_profiles ADD COLUMN IF NOT EXISTS streaming    BOOLEAN NOT NULL DEFAULT true;
 
 -- 思考开关字段 thinking_type，从旧的单一 reasoning_effort 语义一次性拆分而来。
 -- schema.sql 每次启动都执行，故迁移必须只跑一次：仅当该列尚不存在时才回填，
diff --git a/go.mod b/go.mod
index d56340a..481403a 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,7 @@ module github.com/Autumn-27/artex
 go 1.26.3
 
 require (
-	github.com/Autumn-27/norma v0.2.9
+	github.com/Autumn-27/norma v0.3.0
 	github.com/golang-jwt/jwt/v5 v5.3.1
 	github.com/jackc/pgx/v5 v5.10.0
 	github.com/lqqyt2423/go-mitmproxy v1.9.2
diff --git a/go.sum b/go.sum
index 835017c..06acf18 100644
--- a/go.sum
+++ b/go.sum
@@ -1,5 +1,5 @@
-github.com/Autumn-27/norma v0.2.9 h1:VTt8Oe7XoiV85Dc+QOPu+zQ7IykQRm2aDTEbLEzbBe4=
-github.com/Autumn-27/norma v0.2.9/go.mod h1:BudWrf7iHl96FgHqFr/HwN3mKYmGjJDt+xL2ZHXfFZw=
+github.com/Autumn-27/norma v0.3.0 h1:nbaoeLj65ElFwWdy44U0QCXPe0idaw8tdyyuU/Sdbuw=
+github.com/Autumn-27/norma v0.3.0/go.mod h1:BudWrf7iHl96FgHqFr/HwN3mKYmGjJDt+xL2ZHXfFZw=
 github.com/andybalholm/brotli v1.2.1 h1:R+f5xP285VArJDRgowrfb9DqL18yVK0gKAW/F+eTWro=
 github.com/andybalholm/brotli v1.2.1/go.mod h1:rzTDkvFWvIrjDXZHkuS16NPggd91W3kUSvPlQ1pLaKY=
 github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2 h1:DklsrG3dyBCFEj5IhUbnKptjxatkF07cF2ak3yi77so=
diff --git a/llmpool/pool.go b/llmpool/pool.go
index 30b3665..be0ddff 100644
--- a/llmpool/pool.go
+++ b/llmpool/pool.go
@@ -122,6 +122,44 @@ func (p *Pool) Stream(ctx context.Context, req llm.CompletionRequest) iter.Seq2[
 	}
 }
 
+// Complete implements llm.Provider with failover for non-streaming calls. A
+// non-streaming request is atomic — it never delivers partial output — so every
+// failover-eligible failure lands in the safe window and the next member can be
+// tried without risk of duplicated output. Mirrors Stream's health-tripping and
+// chain-exhaustion behavior.
+func (p *Pool) Complete(ctx context.Context, req llm.CompletionRequest) (llm.Message, string, llm.Usage, error) {
+	order := p.order(req)
+	var lastErr error
+	for i, m := range order {
+		msg, sr, usage, err := m.Prov.Complete(ctx, req)
+		if err == nil {
+			p.health.Pass(m.ID)
+			return msg, sr, usage, nil
+		}
+		if !shouldFailover(ctx, err) {
+			// Non-failover error (e.g. ctx cancel, deterministic 4xx): surface as-is
+			// without tripping health, matching Stream's non-failover path.
+			p.health.Pass(m.ID)
+			return llm.Message{}, "", llm.Usage{}, err
+		}
+		lastErr = err
+		hard := isHardFailure(err)
+		if p.health.Trip(m.ID, trimErr(err), hard) {
+			log.Printf("[llmpool] 配置 %q(%s) 已熔断：%s", m.Name, m.Model, trimErr(err))
+		}
+		if i+1 < len(order) {
+			n := order[i+1]
+			log.Printf("[llmpool] LLM 故障转移：%q(%s) → %q(%s)，原因：%s",
+				m.Name, m.Model, n.Name, n.Model, trimErr(err))
+		}
+	}
+	if lastErr == nil {
+		lastErr = ErrExhausted
+	}
+	log.Printf("[llmpool] 轮询链已耗尽(%d 个配置全部失败)，最后错误：%s", len(order), trimErr(lastErr))
+	return llm.Message{}, "", llm.Usage{}, fmt.Errorf("%w：%v", ErrExhausted, lastErr)
+}
+
 // order picks the members to try, in order: skip those in a cooling-off window
 // and those whose context window can't hold this request, then rotate within each
 // equal-priority group so same-priority profiles share the load. Never returns an
diff --git a/llmpool/pool_test.go b/llmpool/pool_test.go
index b1e69c8..21b7568 100644
--- a/llmpool/pool_test.go
+++ b/llmpool/pool_test.go
@@ -55,6 +55,17 @@ func (f *fakeProv) Stream(ctx context.Context, req llm.CompletionRequest) iter.S
 	}
 }
 
+func (f *fakeProv) Complete(ctx context.Context, req llm.CompletionRequest) (llm.Message, string, llm.Usage, error) {
+	acc := llm.NewAccumulator()
+	for ev, err := range f.Stream(ctx, req) {
+		if err != nil {
+			return llm.Message{}, "", llm.Usage{}, err
+		}
+		acc.Add(ev)
+	}
+	return acc.Message(), acc.StopReason, acc.Usage, nil
+}
+
 // ok builds a provider that always succeeds with one text delta.
 func okProv(name, text string) *fakeProv {
 	return &fakeProv{name: name, events: [][]llm.StreamEvent{{{Type: llm.SETextDelta, Text: text}}}}
diff --git a/llmrec/llmrec.go b/llmrec/llmrec.go
index 5fc77d1..3dbdd90 100644
--- a/llmrec/llmrec.go
+++ b/llmrec/llmrec.go
@@ -39,10 +39,10 @@ func TaskIDFrom(ctx context.Context) string {
 
 // Recorder wraps an llm.Provider and records every completion call.
 type Recorder struct {
-	inner   llm.Provider
-	pg      *db.DB
-	model   string // model name (from config, not in CompletionRequest)
-	prof    string // LLM profile name (from llm_profiles)
+	inner llm.Provider
+	pg    *db.DB
+	model string // model name (from config, not in CompletionRequest)
+	prof  string // LLM profile name (from llm_profiles)
 	// thinkingType / reasoningEffort 是配置级思考参数(思考开关 / 思考强度)。它们在
 	// norma 的 buildBody() 里从 provider 配置注入真正的 HTTP body,不出现在
 	// CompletionRequest 上,故 Recorder 需在此单独带一份,序列化时写进录制。
@@ -185,6 +185,58 @@ func (r *Recorder) Stream(ctx context.Context, req llm.CompletionRequest) iter.S
 	}
 }
 
+// Complete implements llm.Provider for non-streaming calls, recording the same
+// metering + body trace as Stream. Metering (token usage) is always written;
+// the heavy request/response body trace is gated by the llm_record setting. The
+// raw wire bodies are captured by the shared HTTP transport (via NewCapture on
+// ctx), identical to the streaming path — a non-streaming response is a single
+// JSON body the transport tees just the same.
+func (r *Recorder) Complete(ctx context.Context, req llm.CompletionRequest) (llm.Message, string, llm.Usage, error) {
+	recordBodies := r.enabled == nil || r.enabled()
+	start := time.Now()
+	session := transcript.SessionIDFrom(ctx)
+	parsedID, worker := parseSession(session)
+	expID := db.ParseExpID(parsedID)
+	taskID := TaskIDFrom(ctx)
+	if taskID == "" {
+		taskID = parsedID
+	}
+
+	reqBody := ""
+	var capt *Capture
+	if recordBodies {
+		reqBody = r.serializeRequest(req)
+		ctx, capt = NewCapture(ctx)
+	}
+
+	msg, stopReason, usage, err := r.inner.Complete(ctx, req)
+
+	status := "ok"
+	if err != nil {
+		status = "error"
+	}
+	// Lightweight metering row — always written.
+	r.recordUsage(taskID, expID, worker, usage, int(time.Since(start).Milliseconds()), status)
+	// Heavy trace row — only when body recording is on.
+	if recordBodies {
+		text, thinking := msg.Text(), thinkingText(msg)
+		r.record(req, session, taskID, worker, reqBody, capt, start, text, thinking, usage, stopReason, err)
+	}
+	return msg, stopReason, usage, err
+}
+
+// thinkingText concatenates the thinking blocks of a message (the non-streaming
+// counterpart of the streaming path's accumulated thinkingBuf).
+func thinkingText(msg llm.Message) string {
+	var b strings.Builder
+	for _, bl := range msg.Content {
+		if bl.Type == llm.BlockThinking && bl.Thinking != "" {
+			b.WriteString(bl.Thinking)
+		}
+	}
+	return b.String()
+}
+
 // recordUsage appends one lightweight metering row to llm_usage (no bodies). Skips
 // zero-token calls with no model, which carry nothing worth metering.
 func (r *Recorder) recordUsage(taskID string, expID int64, worker string, usage llm.Usage, latencyMs int, status string) {
diff --git a/server/goals.go b/server/goals.go
index dbc497d..c8e6d98 100644
--- a/server/goals.go
+++ b/server/goals.go
@@ -383,7 +383,8 @@ func (s *Server) createGoals(ctx context.Context, t *Task, emit func(db.Activity
 	}
 	taskID, _ := strconv.ParseInt(t.ID, 10, 64)
 	s.engine.BeginLLMCall(t.ID)
-	decomposed := agent.DecomposeGoalsWithProvider(ctx, s.agentsForTask(t).runtime, s.m.dir, t.Goal, t.Description, as, t.Store, taskID, emit)
+	goalRuntime := s.agentsForTask(t).runtime
+	decomposed := agent.DecomposeGoalsWithProvider(ctx, goalRuntime, s.m.dir, t.Goal, t.Description, as, t.Store, taskID, goalRuntime.nonStreaming(), emit)
 	s.engine.EndLLMCall(t.ID)
 	for _, g := range decomposed {
 		if strings.TrimSpace(g.Text) != "" {
diff --git a/server/server.go b/server/server.go
index 999fcb6..461b4a4 100644
--- a/server/server.go
+++ b/server/server.go
@@ -305,6 +305,7 @@ func (s *Server) loadLLMConfig() (agent.Config, bool) {
 	cfg.ContextWindowK = p.ContextWindowK
 	cfg.ThinkingType = p.ThinkingType
 	cfg.ReasoningEffort = p.ReasoningEffort
+	cfg.Stream = p.Streaming
 	if cfg.APIKey == "" {
 		return cfg, false
 	}
@@ -322,14 +323,15 @@ func (s *Server) saveLLMConfig(cfg agent.Config) error {
 	}
 	var id int64
 	// agent.Config carries no failover fields, so carry the stored ones forward —
-	// otherwise this legacy endpoint would silently reset the profile's priority
-	// and pool_exclude to zero values on every save.
+	// otherwise this legacy endpoint would silently reset the profile's priority,
+	// pool_exclude, and streaming to zero values on every save.
 	var priority int
 	var poolExclude bool
+	streaming := true // 旧库/新建默认流式
 	if profs, _ := s.m.pg.ListProfiles(); profs != nil {
 		for _, p := range profs {
 			if p.Name == "default" {
-				id, priority, poolExclude = p.ID, p.Priority, p.PoolExclude
+				id, priority, poolExclude, streaming = p.ID, p.Priority, p.PoolExclude, p.Streaming
 				break
 			}
 		}
@@ -338,7 +340,7 @@ func (s *Server) saveLLMConfig(cfg agent.Config) error {
 		ID: id, Name: "default", Format: format, Model: cfg.Model, BaseURL: cfg.BaseURL, Proxy: cfg.Proxy,
 		APIKey: cfg.APIKey, RatePerSecond: cfg.RatePerSecond, RatePerMinute: cfg.RatePerMinute,
 		ContextWindowK: cfg.ContextWindowK, ThinkingType: cfg.ThinkingType, ReasoningEffort: cfg.ReasoningEffort, IsDefault: true,
-		Priority: priority, PoolExclude: poolExclude,
+		Priority: priority, PoolExclude: poolExclude, Streaming: streaming,
 	})
 	if err != nil {
 		return err
@@ -388,6 +390,7 @@ func (s *Server) buildPlannerWorker(pinID *int64, gProv llm.Provider, gCfg agent
 	wk.SetMemory(memory.NewStore(filepath.Join(s.m.dir, "memory")))
 	wk.SetWebSearch(s.webSearchFor("worker"))
 	wk.SetConstraintInject(s.constraintInjectWorker) // 操作约束注入 worker(可配置,默认开;每轮读)
+	wk.SetNonStreaming(nonStreamingResolver(wCfg))   // 该 profile 选非流式时走 Provider.Complete
 	pProv, pCfg := s.providerForAgent("planner", pinID, gProv, gCfg)
 	pl := agent.NewPlanner(pProv, pCfg.Model, s.m.dir, tx, pCfg.CompactionWindow(), s.agentMaxTurns("planner"))
 	pl.SetKillWork(s.engine.KillWork)               // planner kill_work → terminate a running work
@@ -395,9 +398,18 @@ func (s *Server) buildPlannerWorker(pinID *int64, gProv llm.Provider, gCfg agent
 	pl.SetProxy(s.m.ProxyAddr(), s.m.ProxyCACert()) // WebFetch through the recording proxy
 	pl.SetWebSearch(s.webSearchFor("planner"))
 	pl.SetConstraintInject(s.constraintInjectPlanner) // 操作约束注入 planner(可配置,默认开;每轮读)
+	pl.SetNonStreaming(nonStreamingResolver(pCfg))    // 该 profile 选非流式时走 Provider.Complete
 	return pl, wk
 }
 
+// nonStreamingResolver returns a resolver capturing a profile's streaming choice.
+// The agents read it per run; a profile change rebuilds the agents (applyLLM),
+// so the captured value is always the one in effect for this build.
+func nonStreamingResolver(cfg agent.Config) func() bool {
+	nonStreaming := !cfg.Stream
+	return func() bool { return nonStreaming }
+}
+
 // applyLLM (re)builds the planner/worker/main-agent from cfg and installs them on
 // the running engine as the GLOBAL active pair. Safe to call at runtime (UI configures LLM).
 func (s *Server) applyLLM(cfg agent.Config) error {
@@ -441,12 +453,14 @@ func (s *Server) applyLLM(cfg agent.Config) error {
 	s.mainAgent.SetProxy(s.m.ProxyAddr(), s.m.ProxyCACert()) // WebFetch through the recording proxy
 	s.mainAgent.SetWebSearch(s.webSearchFor("mainagent"))
 	s.mainAgent.SetSteerWork(s.engine.SteerWork) // steer_work：人对运行中 work 实时纠偏
+	s.mainAgent.SetNonStreaming(nonStreamingResolver(mCfg))
 	// chat agent serves MANY custom agents by key → it holds the GLOBAL opts
 	// (backend/key) and gates Enabled per-conversation-agent at Chat time. 对话始终用激活配置。
 	s.chatAgent = agent.NewChatAgent(prov, cfg.Model, s.m.dir, tx, win) // chat page runner
 	s.chatAgent.SetProxy(s.m.ProxyAddr(), s.m.ProxyCACert())
 	s.chatAgent.SetWebSearch(s.m.WebSearchOpts())
 	s.chatAgent.SetGuard(s.chatGuard())
+	s.chatAgent.SetNonStreaming(nonStreamingResolver(cfg))
 	s.llmProv = prov
 	s.llmCfg = cfg
 	s.llmOn = true
@@ -472,6 +486,7 @@ func (s *Server) loadProfileConfig(id int64) (agent.Config, bool) {
 	cfg.ContextWindowK = p.ContextWindowK
 	cfg.ThinkingType = p.ThinkingType
 	cfg.ReasoningEffort = p.ReasoningEffort
+	cfg.Stream = p.Streaming
 	if cfg.APIKey == "" {
 		return cfg, false
 	}
@@ -623,6 +638,7 @@ func (s *Server) chatAgentForProfile(id int64) *agent.ChatAgent {
 	ca.SetProxy(s.m.ProxyAddr(), s.m.ProxyCACert())
 	ca.SetWebSearch(s.m.WebSearchOpts())
 	ca.SetGuard(s.chatGuard())
+	ca.SetNonStreaming(nonStreamingResolver(cfg))
 	s.profMu.Lock()
 	if ex := s.profChatAgents[id]; ex != nil { // lost the race → keep the winner
 		ca = ex
diff --git a/server/server_mgmt.go b/server/server_mgmt.go
index 3b2fad7..02baba2 100644
--- a/server/server_mgmt.go
+++ b/server/server_mgmt.go
@@ -1736,10 +1736,14 @@ func (s *Server) pgSaveProfile(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	// APIKey has json:"-" on db.LLMProfile so it is never leaked to the UI on
-	// read; accept it here via a sibling field for create/update.
+	// read; accept it here via a sibling field for create/update. Streaming is a
+	// *bool shadowing the embedded json:"streaming": an absent field must default
+	// to streaming (true), which a plain bool zero value (false = non-streaming)
+	// would get wrong — legacy/partial clients that never send it stay streaming.
 	var body struct {
 		db.LLMProfile
-		APIKey string `json:"api_key"`
+		APIKey    string `json:"api_key"`
+		Streaming *bool  `json:"streaming"`
 	}
 	if err := decode(r, &body); err != nil {
 		writeErr(w, 400, err.Error())
@@ -1747,6 +1751,7 @@ func (s *Server) pgSaveProfile(w http.ResponseWriter, r *http.Request) {
 	}
 	p := body.LLMProfile
 	p.APIKey = body.APIKey
+	p.Streaming = body.Streaming == nil || *body.Streaming
 	id, err := pg.SaveProfile(&p)
 	if err != nil {
 		writeErr(w, 500, err.Error())
diff --git a/server/task_llm.go b/server/task_llm.go
index 01a94b7..5a22600 100644
--- a/server/task_llm.go
+++ b/server/task_llm.go
@@ -139,6 +139,36 @@ func (r *taskLLMRuntime) current() (*Task, int64, int64, llm.Provider, error) {
 	return t, 0, pt.LLMChainRevision, prov, nil
 }
 
+// nonStreaming reports whether the task's currently-active LLM source is set to
+// non-streaming. It mirrors current()'s source precedence (agent binding →
+// active chain profile → global) but reads only the streaming flag. Read-only
+// and best-effort: any resolution error falls back to streaming (false), the
+// safe default. If failover switches to a profile with a different streaming
+// setting, the change takes effect on the next agent run (a fresh Session is
+// built per run in captureRun).
+func (r *taskLLMRuntime) nonStreaming() bool {
+	taskNum, err := parseTaskID(r.taskID)
+	if err != nil {
+		return false
+	}
+	pt, err := r.s.m.pg.GetTask(taskNum)
+	if err != nil || pt == nil {
+		return false
+	}
+	if _, cfg, ok := r.s.agentBindingProvider(r.agentKey); ok {
+		return !cfg.Stream
+	}
+	if len(pt.LLMProfileIDs) > 0 && pt.ActiveLLMProfileID != nil {
+		if _, cfg, ok := r.s.providerForProfile(*pt.ActiveLLMProfileID); ok {
+			return !cfg.Stream
+		}
+	}
+	if _, cfg, ok := r.s.globalProvider(); ok {
+		return !cfg.Stream
+	}
+	return false
+}
+
 func parseTaskID(id string) (int64, error) {
 	n, err := strconv.ParseInt(id, 10, 64)
 	if err != nil || n <= 0 {
@@ -147,9 +177,11 @@ func parseTaskID(id string) (int64, error) {
 	return n, nil
 }
 
-func (r *taskLLMRuntime) Stream(ctx context.Context, req llm.CompletionRequest) iter.Seq2[llm.StreamEvent, error] {
-	ctx = llmrec.WithTaskID(ctx, r.taskID)
-	hooks := taskLLMStreamHooks{
+// streamHooks builds the failover/exhaustion callbacks shared by Stream and
+// Complete: how to read the current profile selection, how to mark it quota
+// exhausted, and how to emit a failover transition.
+func (r *taskLLMRuntime) streamHooks() taskLLMStreamHooks {
+	return taskLLMStreamHooks{
 		current: func() (taskLLMSelection, error) {
 			task, profileID, revision, provider, err := r.current()
 			return taskLLMSelection{task: task, profileID: profileID, revision: revision, provider: provider}, err
@@ -169,7 +201,70 @@ func (r *taskLLMRuntime) Stream(ctx context.Context, req llm.CompletionRequest)
 			r.s.emitTaskLLMTransition(selection.task, transition, cause)
 		},
 	}
-	return streamTaskLLM(ctx, r.taskID, req, hooks)
+}
+
+func (r *taskLLMRuntime) Stream(ctx context.Context, req llm.CompletionRequest) iter.Seq2[llm.StreamEvent, error] {
+	ctx = llmrec.WithTaskID(ctx, r.taskID)
+	return streamTaskLLM(ctx, r.taskID, req, r.streamHooks())
+}
+
+// Complete is the non-streaming counterpart of Stream. A non-streaming call is
+// atomic — it never delivers partial output — so every failure is safe to retry
+// on the same provider or fail over to the next profile without risking
+// duplicated model output or tool execution (the "committed" bookkeeping the
+// streaming path needs is unnecessary here).
+func (r *taskLLMRuntime) Complete(ctx context.Context, req llm.CompletionRequest) (llm.Message, string, llm.Usage, error) {
+	ctx = llmrec.WithTaskID(ctx, r.taskID)
+	return completeTaskLLM(ctx, r.taskID, req, r.streamHooks())
+}
+
+func completeTaskLLM(ctx context.Context, taskID string, req llm.CompletionRequest, hooks taskLLMStreamHooks) (llm.Message, string, llm.Usage, error) {
+	for {
+		selection, err := hooks.current()
+		if err != nil {
+			return llm.Message{}, "", llm.Usage{}, err
+		}
+		var (
+			msg     llm.Message
+			sr      string
+			usage   llm.Usage
+			callErr error
+		)
+		// 同 provider 安全窗口重试:非流式调用要么整体成功、要么整体失败,没有
+		// 中途已交付输出的问题,所以任何瞬时失败都可原样重试。
+		for attempt := 0; ; attempt++ {
+			msg, sr, usage, callErr = selection.provider.Complete(ctx, req)
+			if callErr != nil && ctx.Err() == nil &&
+				attempt < sameProviderStreamRetries && isRetryableStreamError(callErr) {
+				backoff := sameProviderRetryBackoff(attempt)
+				log.Printf("[task-llm] task %s 非流式调用失败,%v 后同 provider 重试 (%d/%d): %v",
+					taskID, backoff, attempt+1, sameProviderStreamRetries, callErr)
+				if sleepCtx(ctx, backoff) {
+					break // 退避期间 ctx 取消 → 停止重试
+				}
+				continue
+			}
+			break
+		}
+		if callErr == nil {
+			return msg, sr, usage, nil
+		}
+		// profileID=0: 显式链已被清空;非额度错误:透传。二者都不改任务 failover 状态。
+		if selection.profileID == 0 || !isQuotaExhaustedError(callErr) {
+			return llm.Message{}, "", llm.Usage{}, callErr
+		}
+		transition, markErr := hooks.exhaust(selection, callErr)
+		if markErr != nil {
+			return llm.Message{}, "", llm.Usage{}, fmt.Errorf("mark profile quota exhausted after %v: %w", callErr, markErr)
+		}
+		if transition.Advanced && !transition.Stale && hooks.transition != nil {
+			hooks.transition(selection, transition, callErr)
+		}
+		if !transition.Stale && transition.NextProfileID == nil {
+			return llm.Message{}, "", llm.Usage{}, &taskLLMError{taskID: taskID, chainExhausted: transition.ChainExhausted, cause: callErr}
+		}
+		// 没有任何输出交付给调用方,换下一个 profile 重放同一逻辑请求是安全的。
+	}
 }
 
 func streamTaskLLM(ctx context.Context, taskID string, req llm.CompletionRequest, hooks taskLLMStreamHooks) iter.Seq2[llm.StreamEvent, error] {
@@ -435,6 +530,7 @@ func (s *Server) agentsForTask(t *Task) *taskAgentBundle {
 	window := workerRuntime.CompactionWindow()
 	wk := agent.NewWorker(workerRuntime, "task-router", s.m.dir, tx, window, s.agentMaxTurns("worker"))
 	wk.SetCompactionWindowResolver(workerRuntime.CompactionWindow)
+	wk.SetNonStreaming(workerRuntime.nonStreaming) // 按任务当前激活 profile 的流式开关(每轮读)
 	wk.SetRunTimeout(time.Duration(s.agentRunSeconds("worker")) * time.Second)
 	wk.SetProxy(s.m.ProxyAddr(), s.m.ProxyCACert())
 	wk.SetMemory(memory.NewStore(filepath.Join(s.m.dir, "memory")))
@@ -442,6 +538,7 @@ func (s *Server) agentsForTask(t *Task) *taskAgentBundle {
 	wk.SetConstraintInject(s.constraintInjectWorker) // 操作约束注入 worker(可配置,默认开)
 	pl := agent.NewPlanner(plannerRuntime, "task-router", s.m.dir, tx, plannerRuntime.CompactionWindow(), s.agentMaxTurns("planner"))
 	pl.SetCompactionWindowResolver(plannerRuntime.CompactionWindow)
+	pl.SetNonStreaming(plannerRuntime.nonStreaming)
 	pl.SetKillWork(s.engine.KillWork)
 	pl.SetSteerWork(s.engine.SteerWork)
 	pl.SetProxy(s.m.ProxyAddr(), s.m.ProxyCACert())
@@ -449,6 +546,7 @@ func (s *Server) agentsForTask(t *Task) *taskAgentBundle {
 	pl.SetConstraintInject(s.constraintInjectPlanner) // 操作约束注入 planner(可配置,默认开)
 	main := agent.NewMainAgent(mainRuntime, "task-router", s.m.dir, tx, mainRuntime.CompactionWindow(), s.agentMaxTurns("mainagent"))
 	main.SetCompactionWindowResolver(mainRuntime.CompactionWindow)
+	main.SetNonStreaming(mainRuntime.nonStreaming)
 	main.SetProxy(s.m.ProxyAddr(), s.m.ProxyCACert())
 	main.SetWebSearch(s.webSearchFor("mainagent"))
 	main.SetSteerWork(s.engine.SteerWork) // steer_work：人对运行中 work 实时纠偏
diff --git a/server/task_llm_test.go b/server/task_llm_test.go
index a72ae34..2d83bce 100644
--- a/server/task_llm_test.go
+++ b/server/task_llm_test.go
@@ -36,6 +36,23 @@ func (p *scriptedLLMProvider) Stream(context.Context, llm.CompletionRequest) ite
 	}
 }
 
+func (p *scriptedLLMProvider) Complete(ctx context.Context, req llm.CompletionRequest) (llm.Message, string, llm.Usage, error) {
+	return accumulateStreamForTest(ctx, p.Stream, req)
+}
+
+// accumulateStreamForTest drains a mock's Stream to satisfy the non-streaming
+// Complete method.
+func accumulateStreamForTest(ctx context.Context, stream func(context.Context, llm.CompletionRequest) iter.Seq2[llm.StreamEvent, error], req llm.CompletionRequest) (llm.Message, string, llm.Usage, error) {
+	acc := llm.NewAccumulator()
+	for ev, err := range stream(ctx, req) {
+		if err != nil {
+			return llm.Message{}, "", llm.Usage{}, err
+		}
+		acc.Add(ev)
+	}
+	return acc.Message(), acc.StopReason, acc.Usage, nil
+}
+
 // withZeroRetryBackoff sets the same-provider retry backoff to zero for the
 // duration of a (serial) test and returns a restore func for defer.
 func withZeroRetryBackoff() func() {
@@ -72,6 +89,10 @@ func (p *flakyThenOKProvider) Stream(context.Context, llm.CompletionRequest) ite
 	}
 }
 
+func (p *flakyThenOKProvider) Complete(ctx context.Context, req llm.CompletionRequest) (llm.Message, string, llm.Usage, error) {
+	return accumulateStreamForTest(ctx, p.Stream, req)
+}
+
 func collectTaskLLMStream(seq iter.Seq2[llm.StreamEvent, error]) ([]llm.StreamEvent, error) {
 	var events []llm.StreamEvent
 	var streamErr error
diff --git a/web/src/app/(main)/system/llm/page.tsx b/web/src/app/(main)/system/llm/page.tsx
index b08c6ef..db51f48 100644
--- a/web/src/app/(main)/system/llm/page.tsx
+++ b/web/src/app/(main)/system/llm/page.tsx
@@ -309,6 +309,7 @@ function ProfileSheet({
   const [effort, setEffort] = React.useState(NONE);
   const [priority, setPriority] = React.useState("0"); // 轮询顺位;越大越先
   const [poolExclude, setPoolExclude] = React.useState(false);
+  const [streaming, setStreaming] = React.useState(true); // true=流式(默认);false=非流式
   const [testing, setTesting] = React.useState(false);
   const [saving, setSaving] = React.useState(false);
   const [models, setModels] = React.useState<string[]>([]);
@@ -331,6 +332,7 @@ function ProfileSheet({
     setEffort(fromStore(profile?.reasoning_effort));
     setPriority(String(profile?.priority ?? 0));
     setPoolExclude(profile?.pool_exclude ?? false);
+    setStreaming(profile?.streaming ?? true);
     setApiKey("");
     setKeyHint(profile?.api_key_hint ?? "");
     setModels([]);
@@ -398,6 +400,7 @@ function ProfileSheet({
         reasoning_effort: toStore(effort),
         priority: Number(priority) || 0,
         pool_exclude: poolExclude,
+        streaming,
       });
       if (isNew) toast.success(`已新建：${name.trim()}（在卡片上「设为激活」以启用）`);
       else toast.success(profile?.is_default ? "已保存，激活配置即时生效，无需重启" : "已保存");
@@ -595,6 +598,16 @@ function ProfileSheet({
               </div>
               <Switch checked={poolExclude} onCheckedChange={setPoolExclude} aria-label="不参与轮询" />
             </div>
+            <div className="flex items-center justify-between gap-4 border-t pt-3">
+              <div className="grid gap-0.5">
+                <Label className="text-sm">流式输出 · streaming</Label>
+                <p className="text-muted-foreground text-xs">
+                  开启（默认）走流式 SSE，有运行中实时进度与实时 token 计数。 关闭则走真·非流式（stream:false，
+                  一次性返回完整响应）——可绕开部分网关糟糕的 SSE 实现（空帧 / 思考字段丢帧）， 代价是失去运行中的实时进度。
+                </p>
+              </div>
+              <Switch checked={streaming} onCheckedChange={setStreaming} aria-label="流式输出" />
+            </div>
           </div>
 
           <div className="grid gap-3 rounded-lg border p-3">
diff --git a/web/src/lib/api.ts b/web/src/lib/api.ts
index 9bb02e9..f606f6c 100644
--- a/web/src/lib/api.ts
+++ b/web/src/lib/api.ts
@@ -672,6 +672,7 @@ export const api = {
     reasoning_effort?: string; // ""(不发送)|"low"|"medium"|"high"|"xhigh"|"max"
     priority?: number; // 轮询顺位，越大越先用
     pool_exclude?: boolean; // true=不作为故障转移目标
+    streaming?: boolean; // true(默认)=流式 | false=非流式
   }) => post<{ id: number }>("/llm/profiles", p),
   deleteLLMProfile: (id: string) => del<{ deleted: number }>(`/llm/profiles/${id}`),
   activateLLMProfile: (id: string) => post<{ ok: boolean }>("/llm/profiles/active", { id: Number(id) }),
diff --git a/web/src/lib/types.ts b/web/src/lib/types.ts
index f9ada0d..da51599 100644
--- a/web/src/lib/types.ts
+++ b/web/src/lib/types.ts
@@ -799,6 +799,8 @@ export interface LLMProfile {
   priority?: number;
   // true = 不作为故障转移目标（仍可被 agent/任务显式绑定使用）。
   pool_exclude?: boolean;
+  // true（默认）= 流式(SSE) | false = 真·非流式(stream:false，一次性返回)。
+  streaming?: boolean;
 }
 
 // ---- LLM 轮询（故障转移）----