diff --git a/internal/channels/bitrix24/channel.go b/internal/channels/bitrix24/channel.go
index 69cbd089..252fdee2 100644
--- a/internal/channels/bitrix24/channel.go
+++ b/internal/channels/bitrix24/channel.go
@@ -56,6 +56,12 @@ type Channel struct {
 	mentionMu sync.Mutex
 	mentionRe *mentionMatcher
 
+	// reactions tracks the current status-reaction emoji per user message so
+	// OnReactionEvent can replace the previous one as the agent's status
+	// progresses (thinking → tool → done). Keyed by "<chatID>:<messageID>";
+	// values are *reactionState. See reactions.go.
+	reactions sync.Map
+
 	// MCP lazy provisioner (Phase C). All fields nil / zero when
 	// provisioning is disabled — channel then works exactly as before
 	// (messages flow through without trying to mint MCP credentials).
diff --git a/internal/channels/bitrix24/handle.go b/internal/channels/bitrix24/handle.go
index c9d1c591..2c8ee702 100644
--- a/internal/channels/bitrix24/handle.go
+++ b/internal/channels/bitrix24/handle.go
@@ -303,6 +303,11 @@ func (c *Channel) handleMessage(ctx context.Context, evt *Event) {
 		// Bitrix replyId.
 		MetaKeyMessageID:  evt.Params.MessageID,
 		MetaKeyVisibility: visibility,
+		// Generic run-tracking key the gateway consumer reads to thread
+		// streaming / status-reaction events back to this message (all other
+		// channels set it). Distinct from bitrix_message_id above (same value
+		// here, but that key is Bitrix-specific reply-link routing).
+		"message_id": evt.Params.MessageID,
 	}
 	// Echo the connector sender tag back on the reply so the Open Channel
 	// connector routes the answer to the right external message:
diff --git a/internal/channels/bitrix24/reactions.go b/internal/channels/bitrix24/reactions.go
new file mode 100644
index 00000000..85865997
--- /dev/null
+++ b/internal/channels/bitrix24/reactions.go
@@ -0,0 +1,167 @@
+package bitrix24
+
+import (
+	"context"
+	"errors"
+	"log/slog"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/nextlevelbuilder/goclaw/internal/channels"
+)
+
+// Compile-time guarantee the Bitrix24 channel provides status reactions.
+var _ channels.ReactionChannel = (*Channel)(nil)
+
+// reactionDebounceInterval throttles intermediate status-reaction updates so a
+// fast think→tool→tool sequence doesn't hammer the REST API. Terminal states
+// (done/error) bypass the debounce so the final outcome always lands.
+const reactionDebounceInterval = 700 * time.Millisecond
+
+// statusReaction maps a GoClaw agent status to a Bitrix24 v2 reaction code.
+// Codes come from imbot.v2.Chat.Message.Reaction.add's documented set.
+var statusReaction = map[string]string{
+	"queued":    "eyes",                // 👀 waiting to process
+	"thinking":  "thinkingFace",        // 🤔 processing
+	"tool":      "fire",                // 🔥 running a tool
+	"coding":    "fire",                // 🔥 executing code
+	"web":       "fire",                // 🔥 browsing / API call
+	"done":      "whiteHeavyCheckMark", // ✅ completed
+	"error":     "crossMark",           // ❌ failed
+	"stall":     "sleepingSymbol",      // 😴 no activity
+	"stallSoft": "sleepingSymbol",      // 😴
+	"stallHard": "flushedFace",         // 😳
+}
+
+// reactionState tracks the current reaction code set on one user message so
+// OnReactionEvent can replace it as the agent's status progresses.
+type reactionState struct {
+	mu         sync.Mutex
+	current    string
+	lastUpdate time.Time
+}
+
+// OnReactionEvent sets a status-reaction on the user's message to show agent
+// progress (thinking → tool → done/error). Implements channels.ReactionChannel.
+// messageID is the Bitrix MESSAGE_ID (numeric) of the message that started the run.
+func (c *Channel) OnReactionEvent(ctx context.Context, chatID, messageID, status string) error {
+	level := c.cfg.ReactionLevel
+	if level == "" || level == "off" {
+		return nil
+	}
+	code, ok := statusReaction[status]
+	if !ok {
+		return nil
+	}
+	terminal := status == "done" || status == "error"
+	// "minimal" shows only the final outcome (done/error), not intermediate steps.
+	if level == "minimal" && !terminal {
+		return nil
+	}
+
+	msgID, err := strconv.Atoi(strings.TrimSpace(messageID))
+	if err != nil || msgID <= 0 {
+		return nil // not a Bitrix message id (e.g. connector synthetic id)
+	}
+	botID := c.BotID()
+	if botID <= 0 || c.Client() == nil {
+		return nil
+	}
+
+	key := chatID + ":" + messageID
+	stVal, _ := c.reactions.LoadOrStore(key, &reactionState{})
+	st := stVal.(*reactionState)
+
+	st.mu.Lock()
+	defer st.mu.Unlock()
+
+	if !terminal && time.Since(st.lastUpdate) < reactionDebounceInterval {
+		return nil
+	}
+	if st.current == code {
+		return nil
+	}
+
+	// Bitrix has no "replace" — delete the previous reaction, then add the new.
+	if st.current != "" {
+		c.removeReaction(ctx, botID, msgID, st.current)
+	}
+	if err := c.addReaction(ctx, botID, msgID, code); err != nil {
+		slog.Debug("bitrix24 reaction: add failed",
+			"code", code, "message_id", msgID, "err", err)
+		return nil
+	}
+	st.current = code
+	st.lastUpdate = time.Now()
+
+	// The run is over on terminal states — stop tracking this message.
+	if terminal {
+		c.reactions.Delete(key)
+	}
+	return nil
+}
+
+// ClearReaction removes the current status-reaction from a message.
+// Implements channels.ReactionChannel.
+func (c *Channel) ClearReaction(ctx context.Context, chatID, messageID string) error {
+	key := chatID + ":" + messageID
+	stVal, ok := c.reactions.LoadAndDelete(key)
+	if !ok {
+		return nil
+	}
+	st := stVal.(*reactionState)
+	st.mu.Lock()
+	defer st.mu.Unlock()
+	if st.current == "" {
+		return nil
+	}
+	msgID, err := strconv.Atoi(strings.TrimSpace(messageID))
+	if err != nil || msgID <= 0 {
+		return nil
+	}
+	if botID := c.BotID(); botID > 0 && c.Client() != nil {
+		c.removeReaction(ctx, botID, msgID, st.current)
+	}
+	st.current = ""
+	return nil
+}
+
+// addReaction adds a bot reaction via imbot.v2.Chat.Message.Reaction.add.
+// REACTION_ALREADY_SET is treated as success (the reaction is already present).
+func (c *Channel) addReaction(ctx context.Context, botID, messageID int, code string) error {
+	_, err := c.Client().Call(ctx, "imbot.v2.Chat.Message.Reaction.add", map[string]any{
+		"botId":     botID,
+		"messageId": messageID,
+		"reaction":  code,
+	})
+	if err != nil && isReactionAlreadySet(err) {
+		return nil
+	}
+	return err
+}
+
+// removeReaction removes a bot reaction via imbot.v2.Chat.Message.Reaction.delete.
+// Best-effort: a failed delete is logged and swallowed (worst case a stale
+// reaction lingers, which is cosmetic).
+func (c *Channel) removeReaction(ctx context.Context, botID, messageID int, code string) {
+	if _, err := c.Client().Call(ctx, "imbot.v2.Chat.Message.Reaction.delete", map[string]any{
+		"botId":     botID,
+		"messageId": messageID,
+		"reaction":  code,
+	}); err != nil {
+		slog.Debug("bitrix24 reaction: delete failed",
+			"code", code, "message_id", messageID, "err", err)
+	}
+}
+
+// isReactionAlreadySet reports whether err is the benign REACTION_ALREADY_SET
+// application error from Bitrix (the bot already reacted with this code).
+func isReactionAlreadySet(err error) bool {
+	var apiErr *APIError
+	if errors.As(err, &apiErr) {
+		return apiErr.Code == "REACTION_ALREADY_SET"
+	}
+	return false
+}
diff --git a/internal/channels/bitrix24/reactions_test.go b/internal/channels/bitrix24/reactions_test.go
new file mode 100644
index 00000000..3eef5585
--- /dev/null
+++ b/internal/channels/bitrix24/reactions_test.go
@@ -0,0 +1,129 @@
+package bitrix24
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"sync"
+	"testing"
+)
+
+type reactionCall struct {
+	op       string // "add" | "delete"
+	reaction string
+}
+
+// reactionRecorder serves the v2 reaction endpoints and records each call.
+func reactionRecorder(t *testing.T) (*httptest.Server, func() []reactionCall) {
+	t.Helper()
+	var mu sync.Mutex
+	var calls []reactionCall
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		_ = r.ParseForm()
+		op := ""
+		switch {
+		case strings.HasSuffix(r.URL.Path, "/rest/imbot.v2.Chat.Message.Reaction.add.json"):
+			op = "add"
+		case strings.HasSuffix(r.URL.Path, "/rest/imbot.v2.Chat.Message.Reaction.delete.json"):
+			op = "delete"
+		default:
+			t.Errorf("unexpected reaction path: %q", r.URL.Path)
+		}
+		mu.Lock()
+		calls = append(calls, reactionCall{op: op, reaction: r.Form.Get("reaction")})
+		mu.Unlock()
+		w.Header().Set("Content-Type", "application/json")
+		_ = json.NewEncoder(w).Encode(map[string]any{"result": true})
+	}))
+	return srv, func() []reactionCall {
+		mu.Lock()
+		defer mu.Unlock()
+		out := make([]reactionCall, len(calls))
+		copy(out, calls)
+		return out
+	}
+}
+
+func TestOnReactionEvent_FullFlow_AddThenReplaceViaV2(t *testing.T) {
+	srv, snapshot := reactionRecorder(t)
+	defer srv.Close()
+	bc := newChannelWithBoundPortal(t, srv)
+	bc.cfg.ReactionLevel = "full"
+	ctx := context.Background()
+
+	// thinking → add thinkingFace
+	_ = bc.OnReactionEvent(ctx, "chat100", "5001", "thinking")
+	// done (terminal, bypasses debounce) → delete thinkingFace + add whiteHeavyCheckMark
+	_ = bc.OnReactionEvent(ctx, "chat100", "5001", "done")
+
+	calls := snapshot()
+	if len(calls) != 3 {
+		t.Fatalf("expected 3 reaction calls (add, delete, add), got %d: %+v", len(calls), calls)
+	}
+	if calls[0].op != "add" || calls[0].reaction != "thinkingFace" {
+		t.Errorf("call[0] = %+v; want add thinkingFace", calls[0])
+	}
+	if calls[1].op != "delete" || calls[1].reaction != "thinkingFace" {
+		t.Errorf("call[1] = %+v; want delete thinkingFace", calls[1])
+	}
+	if calls[2].op != "add" || calls[2].reaction != "whiteHeavyCheckMark" {
+		t.Errorf("call[2] = %+v; want add whiteHeavyCheckMark", calls[2])
+	}
+}
+
+func TestOnReactionEvent_MinimalSkipsIntermediate(t *testing.T) {
+	srv, snapshot := reactionRecorder(t)
+	defer srv.Close()
+	bc := newChannelWithBoundPortal(t, srv)
+	bc.cfg.ReactionLevel = "minimal"
+	ctx := context.Background()
+
+	_ = bc.OnReactionEvent(ctx, "chat100", "5001", "thinking") // skipped in minimal
+	_ = bc.OnReactionEvent(ctx, "chat100", "5001", "error")    // terminal → shown
+
+	calls := snapshot()
+	if len(calls) != 1 || calls[0].op != "add" || calls[0].reaction != "crossMark" {
+		t.Fatalf("minimal should send only the terminal reaction; got %+v", calls)
+	}
+}
+
+func TestOnReactionEvent_OffAndInvalidAreNoOp(t *testing.T) {
+	srv, snapshot := reactionRecorder(t)
+	defer srv.Close()
+
+	// off level
+	bc := newChannelWithBoundPortal(t, srv)
+	bc.cfg.ReactionLevel = "off"
+	_ = bc.OnReactionEvent(context.Background(), "chat100", "5001", "done")
+
+	// full level but non-numeric message id (connector synthetic id)
+	bc2 := newChannelWithBoundPortal(t, srv)
+	bc2.cfg.ReactionLevel = "full"
+	_ = bc2.OnReactionEvent(context.Background(), "chat100", "not-a-number", "done")
+
+	// full level, unknown status
+	bc2.cfg.ReactionLevel = "full"
+	_ = bc2.OnReactionEvent(context.Background(), "chat100", "5001", "bogus-status")
+
+	if calls := snapshot(); len(calls) != 0 {
+		t.Fatalf("expected no reaction calls for off/invalid/unknown, got %+v", calls)
+	}
+}
+
+func TestClearReaction_RemovesCurrent(t *testing.T) {
+	srv, snapshot := reactionRecorder(t)
+	defer srv.Close()
+	bc := newChannelWithBoundPortal(t, srv)
+	bc.cfg.ReactionLevel = "full"
+	ctx := context.Background()
+
+	_ = bc.OnReactionEvent(ctx, "chat100", "5001", "thinking") // add thinkingFace
+	_ = bc.ClearReaction(ctx, "chat100", "5001")               // delete thinkingFace
+
+	calls := snapshot()
+	if len(calls) != 2 || calls[1].op != "delete" || calls[1].reaction != "thinkingFace" {
+		t.Fatalf("expected add then delete thinkingFace; got %+v", calls)
+	}
+}