From 3ae1be99db2f80f4c405e553a4ac497be623f13e Mon Sep 17 00:00:00 2001
From: Paul Wells <paulwe@gmail.com>
Date: Sun, 9 Nov 2025 18:30:03 -0800
Subject: [PATCH 1/2] add session features to room observability

---
 observability/roomobs/gen_reporter.go      |  3 +-
 observability/roomobs/gen_reporter_noop.go |  1 +
 observability/roomobs/gen_source.go        |  3 +-
 observability/roomobs/room.go              | 33 ++++++++++++++++++++++
 4 files changed, 38 insertions(+), 2 deletions(-)

diff --git a/observability/roomobs/gen_reporter.go b/observability/roomobs/gen_reporter.go
index edbc0ad32..6265c45ac 100644
--- a/observability/roomobs/gen_reporter.go
+++ b/observability/roomobs/gen_reporter.go
@@ -6,7 +6,7 @@ import (
 	"time"
 )
 
-const Version_LNTFR10 = true
+const Version_JNN296G = true
 
 type KeyResolver interface {
 	Resolve(string)
@@ -43,6 +43,7 @@ type RoomReporter interface {
 type RoomSessionTx interface {
 	ReportStartTime(v time.Time)
 	ReportEndTime(v time.Time)
+	ReportFeatures(v uint16)
 }
 
 type RoomSessionReporter interface {
diff --git a/observability/roomobs/gen_reporter_noop.go b/observability/roomobs/gen_reporter_noop.go
index 5bdf21716..50453b20a 100644
--- a/observability/roomobs/gen_reporter_noop.go
+++ b/observability/roomobs/gen_reporter_noop.go
@@ -78,6 +78,7 @@ func (r *noopRoomSessionReporter) Tx(f func(RoomSessionTx))
 func (r *noopRoomSessionReporter) TxAt(ts time.Time, f func(RoomSessionTx))                 {}
 func (r *noopRoomSessionReporter) ReportStartTime(v time.Time)                              {}
 func (r *noopRoomSessionReporter) ReportEndTime(v time.Time)                                {}
+func (r *noopRoomSessionReporter) ReportFeatures(v uint16)                                  {}
 func (r *noopRoomSessionReporter) WithParticipant(identity string) ParticipantReporter {
 	return &noopParticipantReporter{}
 }
diff --git a/observability/roomobs/gen_source.go b/observability/roomobs/gen_source.go
index 9e65e2145..57ca242e2 100644
--- a/observability/roomobs/gen_source.go
+++ b/observability/roomobs/gen_source.go
@@ -87,5 +87,6 @@ const (
 	RollupParticipantSession      Rollup = "participant_session"
 	RollupTrackIndex              Rollup = "track_index"
 	RollupTrack                   Rollup = "track"
-	RollupProjectRoomIndex        Rollup = "project_room_index"
+	RollupStartTimeIndex          Rollup = "start_time_index"
+	RollupEndTimeIndex            Rollup = "end_time_index"
 )
diff --git a/observability/roomobs/room.go b/observability/roomobs/room.go
index 58abb2dc4..63f0d6842 100644
--- a/observability/roomobs/room.go
+++ b/observability/roomobs/room.go
@@ -96,3 +96,36 @@ func TrackSourceFromProto(p livekit.TrackSource) TrackSource {
 		return TrackSourceUndefined
 	}
 }
+
+type RoomFeature uint16
+
+func (f RoomFeature) HasIngress() bool   { return f&IngressRoomFeature != 0 }
+func (f RoomFeature) HasEgress() bool    { return f&EgressRoomFeature != 0 }
+func (f RoomFeature) HasSIP() bool       { return f&SIPRoomFeature != 0 }
+func (f RoomFeature) HasAgent() bool     { return f&AgentRoomFeature != 0 }
+func (f RoomFeature) HasConnector() bool { return f&ConnectorRoomFeature != 0 }
+
+const (
+	IngressRoomFeature RoomFeature = 1 << iota
+	EgressRoomFeature
+	SIPRoomFeature
+	AgentRoomFeature
+	ConnectorRoomFeature
+)
+
+func RoomFeatureFromParticipantKind(k livekit.ParticipantInfo_Kind) RoomFeature {
+	switch k {
+	case livekit.ParticipantInfo_INGRESS:
+		return IngressRoomFeature
+	case livekit.ParticipantInfo_EGRESS:
+		return EgressRoomFeature
+	case livekit.ParticipantInfo_SIP:
+		return SIPRoomFeature
+	case livekit.ParticipantInfo_AGENT:
+		return AgentRoomFeature
+	case livekit.ParticipantInfo_CONNECTOR:
+		return ConnectorRoomFeature
+	default:
+		return 0
+	}
+}

From 7fc3ededb442d6e7fbbd36e1c67962c7fd49fe1a Mon Sep 17 00:00:00 2001
From: Paul Wells <paulwe@gmail.com>
Date: Sun, 9 Nov 2025 18:44:47 -0800
Subject: [PATCH 2/2] Create light-apricots-act.md

---
 .changeset/light-apricots-act.md | 5 +++++
 1 file changed, 5 insertions(+)
 create mode 100644 .changeset/light-apricots-act.md

diff --git a/.changeset/light-apricots-act.md b/.changeset/light-apricots-act.md
new file mode 100644
index 000000000..7288fa79c
--- /dev/null
+++ b/.changeset/light-apricots-act.md
@@ -0,0 +1,5 @@
+---
+"@livekit/protocol": patch
+---
+
+add session features to room observability