diff --git a/bridge.go b/bridge.go
index 4d79fba..e881a7c 100644
--- a/bridge.go
+++ b/bridge.go
@@ -13,6 +13,7 @@ import (
 
 	"cdr.dev/slog/v3"
 	"github.com/coder/aibridge/circuitbreaker"
+	"github.com/google/uuid"
 	aibcontext "github.com/coder/aibridge/context"
 	"github.com/coder/aibridge/mcp"
 	"github.com/coder/aibridge/metrics"
@@ -196,6 +197,34 @@ func newInterceptionProcessor(p provider.Provider, cbs *circuitbreaker.ProviderC
 			}()
 		}
 
+		// For Coder Agents, the X-Coder-Owner-Id header identifies the actual
+		// user who initiated the chat. Override the actor so usage is attributed
+		// to the correct user rather than the service-level identity.
+		if client == ClientCoderAgents {
+			if ownerID := r.Header.Get("X-Coder-Owner-Id"); ownerID != "" {
+				if _, err := uuid.Parse(ownerID); err != nil {
+					logger.Warn(ctx, "ignoring invalid X-Coder-Owner-Id, expected UUID",
+						slog.F("value", ownerID),
+						slog.Error(err),
+					)
+				} else {
+					existingActor := aibcontext.ActorFromContext(ctx)
+					var md recorder.Metadata
+					var previousActorID string
+					if existingActor != nil {
+						md = existingActor.Metadata
+						previousActorID = existingActor.ID
+					}
+					logger.Debug(ctx, "overriding initiator with X-Coder-Owner-Id",
+						slog.F("previous_actor_id", previousActorID),
+						slog.F("new_actor_id", ownerID),
+					)
+					ctx = aibcontext.AsActor(ctx, ownerID, md)
+					r = r.WithContext(ctx)
+				}
+			}
+		}
+
 		actor := aibcontext.ActorFromContext(ctx)
 		if actor == nil {
 			logger.Warn(ctx, "no actor found in context")
diff --git a/internal/integrationtest/bridge_test.go b/internal/integrationtest/bridge_test.go
index 4f5f72d..3eaa90f 100644
--- a/internal/integrationtest/bridge_test.go
+++ b/internal/integrationtest/bridge_test.go
@@ -12,6 +12,8 @@ import (
 	"testing"
 	"time"
 
+	"cdr.dev/slog/v3"
+	"cdr.dev/slog/v3/sloggers/sloghuman"
 	"github.com/anthropics/anthropic-sdk-go"
 	"github.com/anthropics/anthropic-sdk-go/packages/ssestream"
 	"github.com/anthropics/anthropic-sdk-go/shared/constant"
@@ -2090,3 +2092,82 @@ func TestActorHeaders(t *testing.T) {
 		}
 	}
 }
+
+func TestCoderAgentsInitiatorOverride(t *testing.T) {
+	t.Parallel()
+
+	const overrideActorID = "b1c2d3e4-5678-4a9b-8c0d-1e2f3a4b5c6d"
+
+	cases := []struct {
+		name              string
+		userAgent         string
+		ownerIDHeader     string
+		expectInitiator   string
+		expectLogOverride bool
+	}{
+		{
+			name:              "coder_agents_with_owner_id",
+			userAgent:         "coder-agents/v2.24.0 (linux/amd64)",
+			ownerIDHeader:     overrideActorID,
+			expectInitiator:   overrideActorID,
+			expectLogOverride: true,
+		},
+		{
+			name:            "coder_agents_without_owner_id",
+			userAgent:       "coder-agents/v2.24.0 (linux/amd64)",
+			ownerIDHeader:   "",
+			expectInitiator: defaultActorID,
+		},
+		{
+			name:            "coder_agents_with_invalid_owner_id",
+			userAgent:       "coder-agents/v2.24.0 (linux/amd64)",
+			ownerIDHeader:   "not-a-uuid",
+			expectInitiator: defaultActorID,
+		},
+		{
+			name:            "non_coder_agents_with_owner_id_header",
+			userAgent:       "claude-code/1.0.0",
+			ownerIDHeader:   overrideActorID,
+			expectInitiator: defaultActorID,
+		},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			t.Parallel()
+
+			ctx, cancel := context.WithTimeout(t.Context(), time.Second*30)
+			t.Cleanup(cancel)
+
+			fix := fixtures.Parse(t, fixtures.AntSimple)
+			upstream := newMockUpstream(t, ctx, newFixtureResponse(fix))
+
+			var logBuf bytes.Buffer
+			logger := slog.Make(sloghuman.Sink(&logBuf)).Leveled(slog.LevelDebug)
+			bridgeServer := newBridgeTestServer(t, ctx, upstream.URL, withLogger(logger))
+
+			headers := http.Header{"User-Agent": {tc.userAgent}}
+			if tc.ownerIDHeader != "" {
+				headers.Set("X-Coder-Owner-Id", tc.ownerIDHeader)
+			}
+
+			resp := bridgeServer.makeRequest(t, http.MethodPost, pathAnthropicMessages, fix.Request(), headers)
+			require.Equal(t, http.StatusOK, resp.StatusCode)
+			_, err := io.ReadAll(resp.Body)
+			require.NoError(t, err)
+
+			interceptions := bridgeServer.Recorder.RecordedInterceptions()
+			require.Len(t, interceptions, 1)
+			require.Equal(t, tc.expectInitiator, interceptions[0].InitiatorID)
+
+			logOutput := logBuf.String()
+			if tc.expectLogOverride {
+				assert.Contains(t, logOutput, "overriding initiator with X-Coder-Owner-Id")
+				assert.Contains(t, logOutput, defaultActorID)
+				assert.Contains(t, logOutput, overrideActorID)
+			} else {
+				assert.NotContains(t, logOutput, "overriding initiator with X-Coder-Owner-Id")
+			}
+		})
+	}
+}
diff --git a/internal/integrationtest/setupbridge.go b/internal/integrationtest/setupbridge.go
index bb999d2..effbdc3 100644
--- a/internal/integrationtest/setupbridge.go
+++ b/internal/integrationtest/setupbridge.go
@@ -51,6 +51,7 @@ type bridgeConfig struct {
 	userID           string
 	metadata         recorder.Metadata
 	logger           slog.Logger
+	loggerSet        bool
 }
 
 // bridgeTestServer wraps an httptest.Server running a RequestBridge.
@@ -119,6 +120,11 @@ func withMCP(p mcp.ServerProxier) bridgeOption {
 	return func(c *bridgeConfig) { c.mcpProxy = p }
 }
 
+// withLogger overrides the default test logger.
+func withLogger(l slog.Logger) bridgeOption {
+	return func(c *bridgeConfig) { c.logger = l; c.loggerSet = true }
+}
+
 // withActor sets the actor ID and metadata for the BaseContext.
 func withActor(id string, md recorder.Metadata) bridgeOption {
 	return func(c *bridgeConfig) { c.userID = id; c.metadata = md }
@@ -148,7 +154,9 @@ func newBridgeTestServer(
 	if cfg.tracer == nil {
 		cfg.tracer = defaultTracer
 	}
-	cfg.logger = newLogger(t)
+	if !cfg.loggerSet {
+		cfg.logger = newLogger(t)
+	}
 	if cfg.mcpProxy == nil {
 		cfg.mcpProxy = newNoopMCPManager()
 	}