diff --git a/ingestion/cmd/server/main.go b/ingestion/cmd/server/main.go
index 2294b32..d3a3f18 100644
--- a/ingestion/cmd/server/main.go
+++ b/ingestion/cmd/server/main.go
@@ -410,8 +410,12 @@ func main() {
 			os.Exit(1)
 		}
 		auditSink := buildAuditSink(ctx, brainDir, logger)
+		// The Gitea client also satisfies SummaryWriter (#66): session
+		// summaries are written to mathias/ai-sessions over the same API
+		// token. nil only if a future tracker impl lacks file writes.
+		summaryWriter, _ := tracker.(capture.SummaryWriter)
 		captureSvc := capture.NewService(
-			mcpSrv.BrainStore(), tracker, nil, classCfg, auditSink)
+			mcpSrv.BrainStore(), tracker, summaryWriter, classCfg, auditSink)
 		sovereign := splitList(os.Getenv("BRAIN_CAPTURE_SOVEREIGN_PRINCIPALS"))
 		resolver := capturehttp.NewOriginResolver(sovereign)
 		captureH := capturehttp.New(captureSvc, jwtValidator, mcpToken, "local-cli", resolver)