diff --git a/adapters/multimodal/ingress.go b/adapters/multimodal/ingress.go
new file mode 100644
index 0000000..79cb7b0
--- /dev/null
+++ b/adapters/multimodal/ingress.go
@@ -0,0 +1,18 @@
+package multimodal
+
+import (
+	"crypto/sha256"
+	"encoding/hex"
+	"git.cin.su/m/Assistant/contracts/artifact"
+	"git.cin.su/m/Assistant/contracts/capability"
+	"git.cin.su/m/Assistant/contracts/interaction"
+)
+
+func NormalizeIngress(id string, modality interaction.IngressModality, sourceRef, deviceRef, locationRef, principalID, contentType string, data []byte, response capability.MultimodalResponse, at int64) (interaction.IngressEnvelope, artifact.MediaArtifact) {
+	hash := sha256.Sum256(data)
+	artifactValue := artifact.MediaArtifact{ID: artifact.ArtifactID("artifact:media:" + hex.EncodeToString(hash[:8])), ContentType: contentType, SizeBytes: int64(len(data)), ContentDigest: hex.EncodeToString(hash[:]), SourceRef: sourceRef, RecordedAtUnixMillis: at}
+	if len(data) == 0 {
+		return interaction.IngressEnvelope{ID: id, Modality: modality, SourceRef: sourceRef, DeviceRef: deviceRef, LocationRef: locationRef, PrincipalID: principalID, Degraded: true, RecordedAtUnixMillis: at}, artifact.MediaArtifact{}
+	}
+	return interaction.IngressEnvelope{ID: id, Modality: modality, SourceRef: sourceRef, DeviceRef: deviceRef, LocationRef: locationRef, PrincipalID: principalID, ArtifactRef: string(artifactValue.ID), ObservationRef: response.EvidenceRef, ProviderRef: response.Provider, ModelRef: response.Model, ModelVersion: response.ModelVersion, ConfidenceMillis: response.ConfidenceMillis, RecordedAtUnixMillis: at}, artifactValue
+}
diff --git a/adapters/multimodal/ingress_test.go b/adapters/multimodal/ingress_test.go
new file mode 100644
index 0000000..74978cf
--- /dev/null
+++ b/adapters/multimodal/ingress_test.go
@@ -0,0 +1,22 @@
+package multimodal_test
+
+import (
+	"git.cin.su/m/Assistant/adapters/multimodal"
+	"git.cin.su/m/Assistant/contracts/capability"
+	"git.cin.su/m/Assistant/contracts/interaction"
+	"testing"
+)
+
+func TestIngressNormalizesMediaArtifactAndObservationProvenance(t *testing.T) {
+	e, a := multimodal.NormalizeIngress("ingress-1", interaction.IngressImage, "camera:street", "device:cam", "world:street", "principal", "image/png", []byte("image"), capability.MultimodalResponse{Provider: "local", Model: "vision", ModelVersion: "1", EvidenceRef: "observation-1", ConfidenceMillis: 800}, 1)
+	if !e.Valid() || !a.Valid() || e.ArtifactRef == "" || e.ObservationRef != "observation-1" || e.DeviceRef == "" || e.LocationRef == "" {
+		t.Fatalf("envelope=%+v artifact=%+v", e, a)
+	}
+}
+
+func TestUnavailableIngressDegradesWithoutFabricatingObservation(t *testing.T) {
+	e, a := multimodal.NormalizeIngress("ingress-1", interaction.IngressAudio, "mic", "device:mic", "", "principal", "audio/wav", nil, capability.MultimodalResponse{}, 1)
+	if !e.Degraded || e.ObservationRef != "" || a.Valid() {
+		t.Fatalf("envelope=%+v artifact=%+v", e, a)
+	}
+}
diff --git a/contracts/artifact/types.go b/contracts/artifact/types.go
index 825216f..a742bdb 100644
--- a/contracts/artifact/types.go
+++ b/contracts/artifact/types.go
@@ -5,6 +5,18 @@ import "git.cin.su/m/Assistant/platform/ids"
 import "errors"
 
 type ArtifactID ids.ID
+type MediaArtifact struct {
+	ID                   ArtifactID
+	ContentType          string
+	SizeBytes            int64
+	ContentDigest        string
+	SourceRef            string
+	RecordedAtUnixMillis int64
+}
+
+func (a MediaArtifact) Valid() bool {
+	return a.ID != "" && a.ContentType != "" && a.SizeBytes > 0 && a.ContentDigest != "" && a.SourceRef != "" && a.RecordedAtUnixMillis > 0
+}
 
 type AgentArtifactAttestation struct {
 	ArtifactID          ArtifactID
diff --git a/contracts/capability/multimodal.go b/contracts/capability/multimodal.go
index c12946e..834549a 100644
--- a/contracts/capability/multimodal.go
+++ b/contracts/capability/multimodal.go
@@ -15,11 +15,15 @@ const (
 )
 
 type MultimodalResponse struct {
-	Operation      MultimodalOperation `json:"operation"`
-	Text           string              `json:"text"`
-	Provider       string              `json:"provider,omitempty"`
-	ObservedAt     int64               `json:"observed_at_unix_millis"`
-	ConfidenceNote string              `json:"confidence_note,omitempty"`
-	ContentType    string              `json:"content_type,omitempty"`
-	DataBase64     string              `json:"data_base64,omitempty"`
+	Operation        MultimodalOperation `json:"operation"`
+	Text             string              `json:"text"`
+	Provider         string              `json:"provider,omitempty"`
+	ObservedAt       int64               `json:"observed_at_unix_millis"`
+	ConfidenceNote   string              `json:"confidence_note,omitempty"`
+	ContentType      string              `json:"content_type,omitempty"`
+	DataBase64       string              `json:"data_base64,omitempty"`
+	Model            string              `json:"model,omitempty"`
+	ModelVersion     string              `json:"model_version,omitempty"`
+	ConfidenceMillis int64               `json:"confidence_millis,omitempty"`
+	EvidenceRef      string              `json:"evidence_ref,omitempty"`
 }
diff --git a/contracts/interaction/types.go b/contracts/interaction/types.go
index e743dc6..a086c58 100644
--- a/contracts/interaction/types.go
+++ b/contracts/interaction/types.go
@@ -33,6 +33,36 @@ type SpeakerAttribution struct {
 	Authenticated      bool
 	ObservationRef     string
 }
+type IngressModality string
+
+const (
+	IngressText   IngressModality = "TEXT"
+	IngressAudio  IngressModality = "AUDIO"
+	IngressImage  IngressModality = "IMAGE"
+	IngressVideo  IngressModality = "VIDEO"
+	IngressDevice IngressModality = "DEVICE"
+)
+
+type IngressEnvelope struct {
+	ID                   string
+	Modality             IngressModality
+	SourceRef            string
+	DeviceRef            string
+	LocationRef          string
+	PrincipalID          string
+	ArtifactRef          string
+	ObservationRef       string
+	ProviderRef          string
+	ModelRef             string
+	ModelVersion         string
+	ConfidenceMillis     int64
+	Degraded             bool
+	RecordedAtUnixMillis int64
+}
+
+func (e IngressEnvelope) Valid() bool {
+	return e.ID != "" && e.Modality != "" && e.SourceRef != "" && e.ConfidenceMillis >= 0 && e.ConfidenceMillis <= 1000 && e.RecordedAtUnixMillis > 0 && (!e.Degraded || e.ObservationRef == "")
+}
 
 const (
 	ChannelWebChat                               Channel                         = "WEB_CHAT"
diff --git a/dev/ACTIVE_TASK.json b/dev/ACTIVE_TASK.json
index 919a88f..461db90 100644
--- a/dev/ACTIVE_TASK.json
+++ b/dev/ACTIVE_TASK.json
@@ -1 +1 @@
-{"task_file":"dev/tasks/GEN2-024-multi-person-realms-identity-boundaries-and-contextual-source-trust.json","task_id":"GEN2-024","task_revision":1}
+{"task_file":"dev/tasks/GEN2-025-multimodal-and-ambient-ingress-readiness-without-implementing-the-whole-.json","task_id":"GEN2-025","task_revision":1}