diff --git a/pkg/agent/context_legacy.go b/pkg/agent/context_legacy.go
index eeaba3de9a..075f21741f 100644
--- a/pkg/agent/context_legacy.go
+++ b/pkg/agent/context_legacy.go
@@ -24,7 +24,7 @@ func (m *legacyContextManager) Assemble(_ context.Context, req *AssembleRequest)
 	// Legacy: read history from session, return as-is.
 	// Budget enforcement happens in BuildMessages caller via
 	// isOverContextBudget + forceCompression.
-	agent := m.al.registry.GetDefaultAgent()
+	agent := m.al.agentForSession(req.SessionKey)
 	if agent == nil {
 		return &AssembleResponse{}, nil
 	}
@@ -77,7 +77,7 @@ func (m *legacyContextManager) Clear(_ context.Context, sessionKey string) error
 // maybeSummarize triggers summarization if the session history exceeds thresholds.
 // It runs asynchronously in a goroutine.
 func (m *legacyContextManager) maybeSummarize(sessionKey string) {
-	agent := m.al.registry.GetDefaultAgent()
+	agent := m.al.agentForSession(sessionKey)
 	if agent == nil {
 		return
 	}
@@ -115,7 +115,7 @@ type compressionResult struct {
 // It drops the oldest ~50% of Turns (a Turn is a complete user→LLM→response
 // cycle, as defined in #1316), so tool-call sequences are never split.
 func (m *legacyContextManager) forceCompression(sessionKey string) (compressionResult, bool) {
-	agent := m.al.registry.GetDefaultAgent()
+	agent := m.al.agentForSession(sessionKey)
 	if agent == nil {
 		return compressionResult{}, false
 	}
diff --git a/pkg/agent/context_manager_test.go b/pkg/agent/context_manager_test.go
index bdccf4f693..afd8e3b1ac 100644
--- a/pkg/agent/context_manager_test.go
+++ b/pkg/agent/context_manager_test.go
@@ -15,6 +15,7 @@ import (
 	"github.com/sipeed/picoclaw/pkg/config"
 	runtimeevents "github.com/sipeed/picoclaw/pkg/events"
 	"github.com/sipeed/picoclaw/pkg/providers"
+	"github.com/sipeed/picoclaw/pkg/session"
 )
 
 // ---------------------------------------------------------------------------
@@ -874,3 +875,207 @@ func newCMTestAgentLoop(cfg *config.Config) *AgentLoop {
 	msgBus := bus.NewMessageBus()
 	return NewAgentLoop(cfg, msgBus, &simpleMockProvider{response: "test"})
 }
+
+// ---------------------------------------------------------------------------
+// Routed-agent regression tests
+// ---------------------------------------------------------------------------
+//
+// These tests mirror the dispatch setup from
+// TestClearCommandRoutedAgentCallsContextManagerClear: a default agent ("main")
+// and a routed agent ("support"), with history seeded ONLY into the routed
+// agent's session store. The legacy context manager must resolve session
+// ownership via agentForSession instead of assuming GetDefaultAgent(), or the
+// routed store is invisible to Assemble / maybeSummarize / forceCompression.
+
+// newRoutedCMTestAgentLoop builds an AgentLoop with a default agent (main) and
+// a routed agent (support). defaults may override AgentDefaults (e.g. a low
+// SummarizeMessageThreshold); nil means the standard test defaults.
+func newRoutedCMTestAgentLoop(t *testing.T, defaults *config.AgentDefaults) *AgentLoop {
+	t.Helper()
+	workspace := t.TempDir()
+	cfg := &config.Config{
+		Agents: config.AgentsConfig{
+			Defaults: config.AgentDefaults{
+				Workspace:         filepath.Join(workspace, "main"),
+				ModelName:         "test-model",
+				MaxTokens:         4096,
+				MaxToolIterations: 10,
+			},
+			List: []config.AgentConfig{
+				{ID: "main", Default: true, Workspace: filepath.Join(workspace, "main")},
+				{ID: "support", Workspace: filepath.Join(workspace, "support")},
+			},
+		},
+		Session: config.SessionConfig{
+			Dimensions: []string{"chat"},
+		},
+	}
+	if defaults != nil {
+		cfg.Agents.Defaults = *defaults
+	}
+	msgBus := bus.NewMessageBus()
+	return NewAgentLoop(cfg, msgBus, &simpleMockProvider{response: "summary"})
+}
+
+// routedSessionKey builds an opaque session key scoped to the given agent and
+// registers its scope metadata on that agent's store so agentForSession can
+// resolve ownership (the same resolution Clear() relies on).
+func routedSessionKey(t *testing.T, al *AgentLoop, agentID string) string {
+	t.Helper()
+	agent, ok := al.registry.GetAgent(agentID)
+	if !ok || agent == nil {
+		t.Fatalf("expected agent %q in registry", agentID)
+	}
+	scope := &session.SessionScope{
+		Version:    session.ScopeVersionV1,
+		AgentID:    agentID,
+		Channel:    "cli",
+		Account:    "default",
+		Dimensions: []string{"chat"},
+		Values: map[string]string{
+			"chat": "direct:user1",
+		},
+	}
+	key := session.BuildSessionKey(*scope)
+	ensureSessionMetadata(agent.Sessions, key, scope, nil)
+	return key
+}
+
+// Assemble must read history/summary from the routed agent's session store,
+// not the default agent's store.
+func TestLegacyAssemble_RoutedAgent(t *testing.T) {
+	al := newRoutedCMTestAgentLoop(t, nil)
+	support, ok := al.registry.GetAgent("support")
+	if !ok || support == nil {
+		t.Fatal("expected support agent")
+	}
+	key := routedSessionKey(t, al, "support")
+
+	history := []providers.Message{
+		{Role: "user", Content: "what did I want before ice cream?"},
+		{Role: "assistant", Content: "you wanted a hot dog"},
+	}
+	support.Sessions.SetHistory(key, history)
+	support.Sessions.SetSummary(key, "early summary")
+	if err := support.Sessions.Save(key); err != nil {
+		t.Fatalf("Save: %v", err)
+	}
+
+	resp, err := al.contextManager.Assemble(context.Background(), &AssembleRequest{SessionKey: key})
+	if err != nil {
+		t.Fatalf("Assemble() error = %v", err)
+	}
+	if len(resp.History) != len(history) {
+		t.Fatalf("Assemble() history = %d messages, want %d (routed agent history must be loaded)",
+			len(resp.History), len(history))
+	}
+	if resp.History[0].Content != history[0].Content {
+		t.Fatalf("history[0] = %q, want %q", resp.History[0].Content, history[0].Content)
+	}
+	if resp.Summary != "early summary" {
+		t.Fatalf("Assemble() summary = %q, want %q", resp.Summary, "early summary")
+	}
+}
+
+// maybeSummarize must count messages in the routed
+// agent's store and summarize against the routed agent.
+func TestLegacyCompact_Summarize_RoutedAgent(t *testing.T) {
+	al := newRoutedCMTestAgentLoop(t, &config.AgentDefaults{
+		ContextWindow:             8000,
+		SummarizeMessageThreshold: 2,
+		SummarizeTokenPercent:     75,
+	})
+	support, ok := al.registry.GetAgent("support")
+	if !ok || support == nil {
+		t.Fatal("expected support agent")
+	}
+	key := routedSessionKey(t, al, "support")
+
+	// 6 messages > threshold of 2
+	history := []providers.Message{
+		{Role: "user", Content: "q1"},
+		{Role: "assistant", Content: "a1"},
+		{Role: "user", Content: "q2"},
+		{Role: "assistant", Content: "a2"},
+		{Role: "user", Content: "q3"},
+		{Role: "assistant", Content: "a3"},
+	}
+	support.Sessions.SetHistory(key, history)
+
+	runtimeCh, closeRuntimeEvents := subscribeRuntimeEventsForTest(
+		t,
+		al,
+		16,
+		runtimeevents.KindAgentSessionSummarize,
+	)
+	defer closeRuntimeEvents()
+
+	err := al.contextManager.Compact(context.Background(), &CompactRequest{
+		SessionKey: key,
+		Reason:     ContextCompressReasonSummarize,
+	})
+	if err != nil {
+		t.Fatalf("Compact() error = %v", err)
+	}
+
+	waitForRuntimeEvent(t, runtimeCh, 5*time.Second, func(evt runtimeevents.Event) bool {
+		return evt.Kind == runtimeevents.KindAgentSessionSummarize
+	})
+
+	newHistory := support.Sessions.GetHistory(key)
+	if len(newHistory) >= len(history) {
+		t.Fatalf("expected summarization to reduce routed history from %d messages, got %d",
+			len(history), len(newHistory))
+	}
+	if summary := support.Sessions.GetSummary(key); summary == "" {
+		t.Fatal("expected summary written to routed agent's store")
+	}
+}
+
+// TestLegacyCompact_Overflow_RoutedAgent guards forceCompression: overflow
+// compression must drop oldest turns in the routed agent's store and leave the
+// default agent's store untouched.
+func TestLegacyCompact_Overflow_RoutedAgent(t *testing.T) {
+	al := newRoutedCMTestAgentLoop(t, nil)
+	defaultAgent := al.registry.GetDefaultAgent()
+	if defaultAgent == nil {
+		t.Fatal("expected default agent")
+	}
+	support, ok := al.registry.GetAgent("support")
+	if !ok || support == nil {
+		t.Fatal("expected support agent")
+	}
+	key := routedSessionKey(t, al, "support")
+
+	history := []providers.Message{
+		{Role: "user", Content: "msg 1"},
+		{Role: "assistant", Content: "resp 1"},
+		{Role: "user", Content: "msg 2"},
+		{Role: "assistant", Content: "resp 2"},
+		{Role: "user", Content: "msg 3"},
+	}
+	support.Sessions.SetHistory(key, history)
+
+	err := al.contextManager.Compact(context.Background(), &CompactRequest{
+		SessionKey: key,
+		Reason:     ContextCompressReasonRetry,
+	})
+	if err != nil {
+		t.Fatalf("Compact() error = %v", err)
+	}
+
+	newHistory := support.Sessions.GetHistory(key)
+	if len(newHistory) >= len(history) {
+		t.Fatalf("expected compressed routed history, got %d messages (was %d)",
+			len(newHistory), len(history))
+	}
+	summary := support.Sessions.GetSummary(key)
+	if !strings.Contains(summary, "Emergency compression") {
+		t.Fatalf("expected compression note in routed summary, got %q", summary)
+	}
+
+	// The default agent's store must not be touched by routed compression.
+	if h := defaultAgent.Sessions.GetHistory(key); len(h) != 0 {
+		t.Fatalf("default agent store unexpectedly has %d messages for routed key", len(h))
+	}
+}
diff --git a/pkg/agent/context_seahorse.go b/pkg/agent/context_seahorse.go
index 4e4c55fd90..f0b4fe7672 100644
--- a/pkg/agent/context_seahorse.go
+++ b/pkg/agent/context_seahorse.go
@@ -56,11 +56,20 @@ func newSeahorseContextManager(_ json.RawMessage, al *AgentLoop) (ContextManager
 	al.RegisterTool(seahorse.NewGrepTool(retrieval))
 	al.RegisterTool(seahorse.NewExpandTool(retrieval))
 
-	// Bootstrap all existing sessions at startup
-	if agent.Sessions != nil {
-		ctx := context.Background()
-		for _, sessionKey := range agent.Sessions.ListSessions() {
-			mgr.bootstrapSession(ctx, sessionKey)
+	// Bootstrap all existing sessions at startup, for ALL registered agents.
+	// Routed agents keep history in their own session stores; a seahorse
+	// turn for a routed session would otherwise start with empty context
+	// because only the default agent's store was imported.
+	ctx := context.Background()
+	if al.registry != nil {
+		for _, agentID := range al.registry.ListAgentIDs() {
+			agent, ok := al.registry.GetAgent(agentID)
+			if !ok || agent == nil || agent.Sessions == nil {
+				continue
+			}
+			for _, sessionKey := range agent.Sessions.ListSessions() {
+				mgr.bootstrapSession(ctx, agent.Sessions, sessionKey)
+			}
 		}
 	}
 
@@ -179,12 +188,16 @@ func (m *seahorseContextManager) Clear(ctx context.Context, sessionKey string) e
 }
 
 // bootstrapSession reconciles JSONL session history into seahorse SQLite.
-func (m *seahorseContextManager) bootstrapSession(ctx context.Context, sessionKey string) {
-	if m.sessions == nil {
+func (m *seahorseContextManager) bootstrapSession(
+	ctx context.Context,
+	sessions session.SessionStore,
+	sessionKey string,
+) {
+	if sessions == nil {
 		return
 	}
 
-	history := m.sessions.GetHistory(sessionKey)
+	history := sessions.GetHistory(sessionKey)
 	if len(history) == 0 {
 		return
 	}
diff --git a/pkg/agent/context_seahorse_test.go b/pkg/agent/context_seahorse_test.go
index 497e1fc449..7fb2932e73 100644
--- a/pkg/agent/context_seahorse_test.go
+++ b/pkg/agent/context_seahorse_test.go
@@ -3,6 +3,7 @@ package agent
 import (
 	"context"
 	"fmt"
+	"path/filepath"
 	"strings"
 	"testing"
 	"time"
@@ -1165,3 +1166,78 @@ func TestSeahorseSummarizeSkipsCondensedWhenBelowThreshold(t *testing.T) {
 		t.Errorf("BUG: condensed created when tokens (%d) < threshold (%d)", tokensBefore, threshold)
 	}
 }
+
+// ---------------------------------------------------------------------------
+// Routed-agent regression tests
+// ---------------------------------------------------------------------------
+
+// routedSeahorseConfig returns a two-agent config (main default + support
+// routed) sharing the given workspace root.
+// ctxManager "" selects the legacy manager; "seahorse" selects the seahorse 
+// context manager.
+func routedSeahorseConfig(workspace, ctxManager string) *config.Config {
+	return &config.Config{
+		Agents: config.AgentsConfig{
+			Defaults: config.AgentDefaults{
+				Workspace:         filepath.Join(workspace, "main"),
+				ModelName:         "test-model",
+				MaxTokens:         4096,
+				MaxToolIterations: 10,
+				ContextManager:    ctxManager,
+			},
+			List: []config.AgentConfig{
+				{ID: "main", Default: true, Workspace: filepath.Join(workspace, "main")},
+				{ID: "support", Workspace: filepath.Join(workspace, "support")},
+			},
+		},
+	}
+}
+
+// The constructor must import pre-existing history for ALL registered agents,
+// not just the default agent's store.
+func TestSeahorseBootstrap_RoutedAgent(t *testing.T) {
+	workspace := t.TempDir()
+
+	// Phase 1: seed routed-agent history on disk (legacy manager).
+	seedCfg := routedSeahorseConfig(workspace, "")
+	al1 := NewAgentLoop(seedCfg, bus.NewMessageBus(), &seahorseTestProvider{})
+	support1, ok := al1.registry.GetAgent("support")
+	if !ok || support1 == nil {
+		t.Fatal("expected support agent")
+	}
+	key := routedSessionKey(t, al1, "support")
+
+	history := []providers.Message{
+		{Role: "user", Content: "what did I want before ice cream?"},
+		{Role: "assistant", Content: "you wanted a hot dog"},
+	}
+	support1.Sessions.SetHistory(key, history)
+	if err := support1.Sessions.Save(key); err != nil {
+		t.Fatalf("Save: %v", err)
+	}
+
+	// Phase 2: construct a seahorse-backed loop against the same workspaces.
+	// The constructor bootstraps pre-existing sessions into SQLite.
+	seahorseCfg := routedSeahorseConfig(workspace, "seahorse")
+	al2 := NewAgentLoop(seahorseCfg, bus.NewMessageBus(), &seahorseTestProvider{})
+	seahorseCM, ok := al2.contextManager.(*seahorseContextManager)
+	if !ok {
+		t.Fatal("expected seahorseContextManager")
+	}
+
+	resp, err := seahorseCM.Assemble(context.Background(), &AssembleRequest{
+		SessionKey: key,
+		Budget:     100000,
+		MaxTokens:  4096,
+	})
+	if err != nil {
+		t.Fatalf("Assemble: %v", err)
+	}
+	if len(resp.History) != len(history) {
+		t.Fatalf("seahorse history = %d messages, want %d (routed agent sessions must be bootstrapped)",
+			len(resp.History), len(history))
+	}
+	if resp.History[0].Content != history[0].Content {
+		t.Fatalf("history[0] = %q, want %q", resp.History[0].Content, history[0].Content)
+	}
+}