diff --git a/internal/services/server.go b/internal/services/server.go
index d003235b54..a4844f0781 100644
--- a/internal/services/server.go
+++ b/internal/services/server.go
@@ -73,6 +73,7 @@ func RegisterGrpcServices(
 			CaveatTypeSet:                    permSysConfig.CaveatTypeSet,
 			AdditiveOnly:                     schemaServiceOption == V1SchemaServiceAdditiveOnly,
 			ExpiringRelsEnabled:              permSysConfig.ExpiringRelationshipsEnabled,
+			DeprecatedRelsEnabled:            permSysConfig.DeprecatedRelationshipsEnabled,
 			PerformanceInsightMetricsEnabled: permSysConfig.PerformanceInsightMetricsEnabled,
 		}
 		v1.RegisterSchemaServiceServer(srv, v1svc.NewSchemaServer(schemaConfig))
diff --git a/internal/services/shared/errors.go b/internal/services/shared/errors.go
index 05b3907239..4e6d090088 100644
--- a/internal/services/shared/errors.go
+++ b/internal/services/shared/errors.go
@@ -52,6 +52,21 @@ type SchemaWriteDataValidationError struct {
 	error
 }
 
+type DeprecationError struct {
+	error
+}
+
+func NewDeprecationError(namespace string, relation string, comments string) DeprecationError {
+	if relation == "" {
+		return DeprecationError{
+			error: fmt.Errorf("object %s is deprecated, comments:%s", namespace, comments),
+		}
+	}
+	return DeprecationError{
+		error: fmt.Errorf("relation %s#%s is deprecated, comments:%s", namespace, relation, comments),
+	}
+}
+
 // MarshalZerologObject implements zerolog object marshalling.
 func (err SchemaWriteDataValidationError) MarshalZerologObject(e *zerolog.Event) {
 	e.Err(err.error)
@@ -201,6 +216,9 @@ func rewriteError(ctx context.Context, err error, config *ConfigForErrors) error
 		}
 
 		return status.Errorf(codes.Canceled, "%s", err)
+	case errors.As(err, &DeprecationError{}):
+		log.Ctx(ctx).Err(err).Msg("using deprecated relation")
+		return status.Errorf(codes.Aborted, "%s", err)
 	default:
 		log.Ctx(ctx).Err(err).Msg("received unexpected error")
 		return err
diff --git a/internal/services/v1/relationships.go b/internal/services/v1/relationships.go
index 87ccd8bd57..338cc89ca4 100644
--- a/internal/services/v1/relationships.go
+++ b/internal/services/v1/relationships.go
@@ -16,6 +16,7 @@ import (
 	v1 "github.com/authzed/authzed-go/proto/authzed/api/v1"
 
 	"github.com/authzed/spicedb/internal/dispatch"
+	log "github.com/authzed/spicedb/internal/logging"
 	"github.com/authzed/spicedb/internal/middleware"
 	datastoremw "github.com/authzed/spicedb/internal/middleware/datastore"
 	"github.com/authzed/spicedb/internal/middleware/handwrittenvalidation"
@@ -34,6 +35,7 @@ import (
 	"github.com/authzed/spicedb/pkg/genutil"
 	"github.com/authzed/spicedb/pkg/genutil/mapz"
 	"github.com/authzed/spicedb/pkg/middleware/consistency"
+	corev1 "github.com/authzed/spicedb/pkg/proto/core/v1"
 	dispatchv1 "github.com/authzed/spicedb/pkg/proto/dispatch/v1"
 	"github.com/authzed/spicedb/pkg/tuple"
 	"github.com/authzed/spicedb/pkg/zedtoken"
@@ -103,6 +105,9 @@ type PermissionsServerConfig struct {
 	// ExpiringRelationshipsEnabled defines whether or not expiring relationships are enabled.
 	ExpiringRelationshipsEnabled bool
 
+	// DeprecatedRelationshipsEnabled defines whether or not deprecated relationships are enabled.
+	DeprecatedRelationshipsEnabled bool
+
 	// CaveatTypeSet is the set of caveat types to use for caveats. If not specified,
 	// the default type set is used.
 	CaveatTypeSet *caveattypes.TypeSet
@@ -132,6 +137,7 @@ func NewPermissionsServer(
 		MaxCheckBulkConcurrency:          defaultIfZero(config.MaxCheckBulkConcurrency, 50),
 		CaveatTypeSet:                    caveattypes.TypeSetOrDefault(config.CaveatTypeSet),
 		ExpiringRelationshipsEnabled:     config.ExpiringRelationshipsEnabled,
+		DeprecatedRelationshipsEnabled:   config.DeprecatedRelationshipsEnabled,
 		PerformanceInsightMetricsEnabled: config.PerformanceInsightMetricsEnabled,
 	}
 
@@ -324,6 +330,12 @@ func (ps *permissionServer) WriteRelationships(ctx context.Context, req *v1.Writ
 	updateRelationshipSet := mapz.NewSet[string]()
 	for _, update := range req.Updates {
 		// TODO(jschorr): Change to struct-based keys.
+		if ps.config.DeprecatedRelationshipsEnabled {
+			if err := checkForDeprecatedRelationsAndObjects(ctx, update, ds); err != nil {
+				return nil, ps.rewriteError(ctx, err)
+			}
+		}
+
 		tupleStr := tuple.V1StringRelationshipWithoutCaveatOrExpiration(update.Relationship)
 		if !updateRelationshipSet.Add(tupleStr) {
 			return nil, ps.rewriteError(
@@ -620,3 +632,70 @@ func labelsForFilter(filter *v1.RelationshipFilter) perfinsights.APIShapeLabels
 		perfinsights.SubjectRelationLabel:  filter.OptionalSubjectFilter.OptionalRelation.Relation,
 	}
 }
+
+func checkForDeprecatedRelationsAndObjects(ctx context.Context, update *v1.RelationshipUpdate, ds datastore.Datastore) error {
+	resource := update.Relationship.Resource
+	headRevision, err := ds.HeadRevision(ctx)
+	if err != nil {
+		return err
+	}
+	reader := ds.SnapshotReader(headRevision)
+	_, relDef, err := namespace.ReadNamespaceAndRelation(ctx, resource.ObjectType, update.Relationship.Relation, reader)
+	if err != nil {
+		return err
+	}
+
+	if relDef.Deprecation != nil && relDef.Deprecation.DeprecationType != corev1.DeprecationType_DEPRECATED_TYPE_UNSPECIFIED {
+		// Check if the relation is deprecated
+		switch relDef.Deprecation.DeprecationType {
+		case corev1.DeprecationType_DEPRECATED_TYPE_WARNING:
+			log.Warn().
+				Str("namespace", update.Relationship.Resource.ObjectType).
+				Str("relation", update.Relationship.Relation).
+				Str("comments", relDef.Deprecation.Comments).
+				Msg("write to deprecated relation")
+
+		case corev1.DeprecationType_DEPRECATED_TYPE_ERROR:
+			return shared.NewDeprecationError(update.Relationship.Resource.ObjectType, update.Relationship.Relation, relDef.Deprecation.Comments)
+		}
+	}
+	nsdef, _, err := reader.ReadNamespaceByName(ctx, resource.ObjectType)
+	if err != nil {
+		return err
+	}
+
+	// Check if the resource is deprecated
+	if nsdef.Deprecation != nil && nsdef.Deprecation.DeprecationType != corev1.DeprecationType_DEPRECATED_TYPE_UNSPECIFIED {
+		// Check if the namespace is deprecated
+		switch nsdef.Deprecation.DeprecationType {
+		case corev1.DeprecationType_DEPRECATED_TYPE_WARNING:
+			log.Warn().
+				Str("namespace", nsdef.Name).
+				Str("comments", nsdef.Deprecation.Comments).
+				Msg("write to deprecated object")
+		case corev1.DeprecationType_DEPRECATED_TYPE_ERROR:
+			return shared.NewDeprecationError(resource.ObjectType, "", nsdef.Deprecation.Comments)
+		}
+	}
+
+	objectRef := update.Relationship.Subject
+	nsdef, _, err = reader.ReadNamespaceByName(ctx, objectRef.Object.ObjectType)
+	if err != nil {
+		return err
+	}
+
+	if nsdef.Deprecation != nil && nsdef.Deprecation.DeprecationType != corev1.DeprecationType_DEPRECATED_TYPE_UNSPECIFIED {
+		// Check if the subject is deprecated
+		switch nsdef.Deprecation.DeprecationType {
+		case corev1.DeprecationType_DEPRECATED_TYPE_WARNING:
+			log.Warn().
+				Str("namespace", nsdef.Name).
+				Str("comments", nsdef.Deprecation.Comments).
+				Msg("write to deprecated object")
+		case corev1.DeprecationType_DEPRECATED_TYPE_ERROR:
+			return shared.NewDeprecationError(resource.ObjectType, "", nsdef.Deprecation.Comments)
+		}
+	}
+
+	return nil
+}
diff --git a/internal/services/v1/schema.go b/internal/services/v1/schema.go
index e579bc1e66..c162d0f630 100644
--- a/internal/services/v1/schema.go
+++ b/internal/services/v1/schema.go
@@ -41,6 +41,9 @@ type SchemaServerConfig struct {
 	// ExpiringRelsEnabled indicates whether expiring relationships are enabled.
 	ExpiringRelsEnabled bool
 
+	// DeprecatedRelsEnabled indicates whether deprecated relations are enabled.
+	DeprecatedRelsEnabled bool
+
 	// PerformanceInsightMetricsEnabled indicates whether performance insight metrics are enabled.
 	PerformanceInsightMetricsEnabled bool
 }
@@ -61,9 +64,10 @@ func NewSchemaServer(config SchemaServerConfig) v1.SchemaServiceServer {
 				perfinsights.StreamServerInterceptor(config.PerformanceInsightMetricsEnabled),
 			),
 		},
-		additiveOnly:        config.AdditiveOnly,
-		expiringRelsEnabled: config.ExpiringRelsEnabled,
-		caveatTypeSet:       cts,
+		additiveOnly:          config.AdditiveOnly,
+		expiringRelsEnabled:   config.ExpiringRelsEnabled,
+		deprecatedRelsEnabled: config.DeprecatedRelsEnabled,
+		caveatTypeSet:         cts,
 	}
 }
 
@@ -71,9 +75,10 @@ type schemaServer struct {
 	v1.UnimplementedSchemaServiceServer
 	shared.WithServiceSpecificInterceptors
 
-	caveatTypeSet       *caveattypes.TypeSet
-	additiveOnly        bool
-	expiringRelsEnabled bool
+	caveatTypeSet         *caveattypes.TypeSet
+	additiveOnly          bool
+	expiringRelsEnabled   bool
+	deprecatedRelsEnabled bool
 }
 
 func (ss *schemaServer) rewriteError(ctx context.Context, err error) error {
@@ -148,6 +153,9 @@ func (ss *schemaServer) WriteSchema(ctx context.Context, in *v1.WriteSchemaReque
 		opts = append(opts, compiler.DisallowExpirationFlag())
 	}
 
+	if !ss.deprecatedRelsEnabled {
+		opts = append(opts, compiler.DisallowDeprecationFlag())
+	}
 	opts = append(opts, compiler.CaveatTypeSet(ss.caveatTypeSet))
 
 	compiled, err := compiler.Compile(compiler.InputSchema{
diff --git a/internal/services/v1/schema_test.go b/internal/services/v1/schema_test.go
index 3eddbbb940..72b98a06f3 100644
--- a/internal/services/v1/schema_test.go
+++ b/internal/services/v1/schema_test.go
@@ -1642,3 +1642,70 @@ func TestComputablePermissions(t *testing.T) {
 		})
 	}
 }
+
+func TestSchemaChangeRelationDeprecation(t *testing.T) {
+	conn, cleanup, _, _ := testserver.NewTestServer(require.New(t), 0, memdb.DisableGC, true, tf.EmptyDatastore)
+	t.Cleanup(cleanup)
+	client := v1.NewSchemaServiceClient(conn)
+	v1client := v1.NewPermissionsServiceClient(conn)
+
+	// Write a basic schema with deprecations.
+	originalSchema := `
+		use deprecation
+		definition user {}
+		definition testuser {}
+
+		definition document {
+			relation somerelation: user
+			relation otherelation: testuser
+		}
+		
+		@deprecated(warn, document#somerelation, "This relation is deprecated, please use otherelation instead.")
+		@deprecated(error, testuser, "super deprecated")
+		`
+	_, err := client.WriteSchema(t.Context(), &v1.WriteSchemaRequest{
+		Schema: originalSchema,
+	})
+	require.NoError(t, err)
+
+	// Write the relationship referencing the relation.
+	toWrite := tuple.MustParse("document:somedoc#somerelation@user:tom")
+	_, err = v1client.WriteRelationships(t.Context(), &v1.WriteRelationshipsRequest{
+		Updates: []*v1.RelationshipUpdate{tuple.MustUpdateToV1RelationshipUpdate(tuple.Create(
+			toWrite,
+		))},
+	})
+	require.Nil(t, err)
+
+	// Attempt to write to a deprecated object which should fail.
+	toWrite = tuple.MustParse("document:somedoc#otherelation@testuser:jerry")
+	_, err = v1client.WriteRelationships(t.Context(), &v1.WriteRelationshipsRequest{
+		Updates: []*v1.RelationshipUpdate{tuple.MustUpdateToV1RelationshipUpdate(tuple.Create(
+			toWrite,
+		))},
+	})
+	require.Equal(t, "rpc error: code = Aborted desc = object document is deprecated, comments:super deprecated", err.Error())
+
+	// Change the schema to remove the deprecation type.
+	newSchema := `
+		use deprecation
+		definition user {}
+		definition testuser {}
+
+		definition document {
+			relation somerelation: user
+			relation otherelation: testuser
+		}`
+	_, err = client.WriteSchema(t.Context(), &v1.WriteSchemaRequest{
+		Schema: newSchema,
+	})
+	require.NoError(t, err)
+
+	// Again attempt to write to the relation, which should now succeed.
+	_, err = v1client.WriteRelationships(t.Context(), &v1.WriteRelationshipsRequest{
+		Updates: []*v1.RelationshipUpdate{tuple.MustUpdateToV1RelationshipUpdate(tuple.Create(
+			toWrite,
+		))},
+	})
+	require.NoError(t, err)
+}
diff --git a/internal/testserver/server.go b/internal/testserver/server.go
index 60b9bd3fa4..d0e2ab0f8a 100644
--- a/internal/testserver/server.go
+++ b/internal/testserver/server.go
@@ -76,6 +76,7 @@ func NewTestServerWithConfigAndDatastore(require *require.Assertions,
 	cts := caveattypes.TypeSetOrDefault(config.CaveatTypeSet)
 	srv, err := server.NewConfigWithOptionsAndDefaults(
 		server.WithEnableExperimentalRelationshipExpiration(true),
+		server.WithEnableExperimentalRelationshipDeprecation(true),
 		server.WithDatastore(ds),
 		server.WithDispatcher(graph.NewLocalOnlyDispatcher(cts, 10, 100)),
 		server.WithDispatchMaxDepth(50),
diff --git a/pkg/cmd/serve.go b/pkg/cmd/serve.go
index d87534b769..7d7a68a602 100644
--- a/pkg/cmd/serve.go
+++ b/pkg/cmd/serve.go
@@ -169,6 +169,7 @@ func RegisterServeFlags(cmd *cobra.Command, config *server.Config) error {
 	}
 
 	experimentalFlags.BoolVar(&config.EnableExperimentalRelationshipExpiration, "enable-experimental-relationship-expiration", false, "enables experimental support for relationship expiration")
+	experimentalFlags.BoolVar(&config.EnableExperimentalRelationshipDeprecation, "enable-experimental-relationship-deprecation", false, "enables experimental support for deprecating relations")
 	experimentalFlags.BoolVar(&config.EnableExperimentalWatchableSchemaCache, "enable-experimental-watchable-schema-cache", false, "enables the experimental schema cache, which uses the Watch API to keep the schema up to date")
 	// TODO: these two could reasonably be put in either the Dispatch group or the Experimental group. Is there a preference?
 	experimentalFlags.StringToStringVar(&config.DispatchSecondaryUpstreamAddrs, "experimental-dispatch-secondary-upstream-addrs", nil, "secondary upstream addresses for dispatches, each with a name")
diff --git a/pkg/cmd/server/server.go b/pkg/cmd/server/server.go
index f5ca33afb9..b69629171f 100644
--- a/pkg/cmd/server/server.go
+++ b/pkg/cmd/server/server.go
@@ -111,21 +111,22 @@ type Config struct {
 	ClusterDispatchCacheConfig CacheConfig `debugmap:"visible"`
 
 	// API Behavior
-	DisableV1SchemaAPI                       bool          `debugmap:"visible"`
-	V1SchemaAdditiveOnly                     bool          `debugmap:"visible"`
-	MaximumUpdatesPerWrite                   uint16        `debugmap:"visible"`
-	MaximumPreconditionCount                 uint16        `debugmap:"visible"`
-	MaxDatastoreReadPageSize                 uint64        `debugmap:"visible"`
-	StreamingAPITimeout                      time.Duration `debugmap:"visible"`
-	WatchHeartbeat                           time.Duration `debugmap:"visible"`
-	MaxReadRelationshipsLimit                uint32        `debugmap:"visible"`
-	MaxDeleteRelationshipsLimit              uint32        `debugmap:"visible"`
-	MaxLookupResourcesLimit                  uint32        `debugmap:"visible"`
-	MaxBulkExportRelationshipsLimit          uint32        `debugmap:"visible"`
-	EnableExperimentalLookupResources        bool          `debugmap:"visible"`
-	EnableExperimentalRelationshipExpiration bool          `debugmap:"visible"`
-	EnableRevisionHeartbeat                  bool          `debugmap:"visible"`
-	EnablePerformanceInsightMetrics          bool          `debugmap:"visible"`
+	DisableV1SchemaAPI                        bool          `debugmap:"visible"`
+	V1SchemaAdditiveOnly                      bool          `debugmap:"visible"`
+	MaximumUpdatesPerWrite                    uint16        `debugmap:"visible"`
+	MaximumPreconditionCount                  uint16        `debugmap:"visible"`
+	MaxDatastoreReadPageSize                  uint64        `debugmap:"visible"`
+	StreamingAPITimeout                       time.Duration `debugmap:"visible"`
+	WatchHeartbeat                            time.Duration `debugmap:"visible"`
+	MaxReadRelationshipsLimit                 uint32        `debugmap:"visible"`
+	MaxDeleteRelationshipsLimit               uint32        `debugmap:"visible"`
+	MaxLookupResourcesLimit                   uint32        `debugmap:"visible"`
+	MaxBulkExportRelationshipsLimit           uint32        `debugmap:"visible"`
+	EnableExperimentalLookupResources         bool          `debugmap:"visible"`
+	EnableExperimentalRelationshipExpiration  bool          `debugmap:"visible"`
+	EnableExperimentalRelationshipDeprecation bool          `debugmap:"visible"`
+	EnableRevisionHeartbeat                   bool          `debugmap:"visible"`
+	EnablePerformanceInsightMetrics           bool          `debugmap:"visible"`
 
 	// Additional Services
 	MetricsAPI util.HTTPServerConfig `debugmap:"visible"`
@@ -455,6 +456,7 @@ func (c *Config) Complete(ctx context.Context) (RunnableServer, error) {
 		MaxBulkExportRelationshipsLimit:  c.MaxBulkExportRelationshipsLimit,
 		DispatchChunkSize:                c.DispatchChunkSize,
 		ExpiringRelationshipsEnabled:     c.EnableExperimentalRelationshipExpiration,
+		DeprecatedRelationshipsEnabled:   c.EnableExperimentalRelationshipDeprecation,
 		CaveatTypeSet:                    c.DatastoreConfig.CaveatTypeSet,
 		PerformanceInsightMetricsEnabled: c.EnablePerformanceInsightMetrics,
 	}
diff --git a/pkg/cmd/server/zz_generated.options.go b/pkg/cmd/server/zz_generated.options.go
index 95d1c16b5c..72190d1f90 100644
--- a/pkg/cmd/server/zz_generated.options.go
+++ b/pkg/cmd/server/zz_generated.options.go
@@ -91,6 +91,7 @@ func (c *Config) ToOption() ConfigOption {
 		to.MaxBulkExportRelationshipsLimit = c.MaxBulkExportRelationshipsLimit
 		to.EnableExperimentalLookupResources = c.EnableExperimentalLookupResources
 		to.EnableExperimentalRelationshipExpiration = c.EnableExperimentalRelationshipExpiration
+		to.EnableExperimentalRelationshipDeprecation = c.EnableExperimentalRelationshipDeprecation
 		to.EnableRevisionHeartbeat = c.EnableRevisionHeartbeat
 		to.EnablePerformanceInsightMetrics = c.EnablePerformanceInsightMetrics
 		to.MetricsAPI = c.MetricsAPI
@@ -163,6 +164,7 @@ func (c Config) DebugMap() map[string]any {
 	debugMap["MaxBulkExportRelationshipsLimit"] = helpers.DebugValue(c.MaxBulkExportRelationshipsLimit, false)
 	debugMap["EnableExperimentalLookupResources"] = helpers.DebugValue(c.EnableExperimentalLookupResources, false)
 	debugMap["EnableExperimentalRelationshipExpiration"] = helpers.DebugValue(c.EnableExperimentalRelationshipExpiration, false)
+	debugMap["EnableExperimentalRelationshipDeprecation"] = helpers.DebugValue(c.EnableExperimentalRelationshipDeprecation, false)
 	debugMap["EnableRevisionHeartbeat"] = helpers.DebugValue(c.EnableRevisionHeartbeat, false)
 	debugMap["EnablePerformanceInsightMetrics"] = helpers.DebugValue(c.EnablePerformanceInsightMetrics, false)
 	debugMap["MetricsAPI"] = helpers.DebugValue(c.MetricsAPI, false)
@@ -598,6 +600,13 @@ func WithEnableExperimentalRelationshipExpiration(enableExperimentalRelationship
 	}
 }
 
+// WithEnableExperimentalRelationshipDeprecation returns an option that can set EnableExperimentalRelationshipDeprecation on a Config
+func WithEnableExperimentalRelationshipDeprecation(enableExperimentalRelationshipDeprecation bool) ConfigOption {
+	return func(c *Config) {
+		c.EnableExperimentalRelationshipDeprecation = enableExperimentalRelationshipDeprecation
+	}
+}
+
 // WithEnableRevisionHeartbeat returns an option that can set EnableRevisionHeartbeat on a Config
 func WithEnableRevisionHeartbeat(enableRevisionHeartbeat bool) ConfigOption {
 	return func(c *Config) {
diff --git a/pkg/cmd/testserver/testserver.go b/pkg/cmd/testserver/testserver.go
index 96d852094c..af61011e5f 100644
--- a/pkg/cmd/testserver/testserver.go
+++ b/pkg/cmd/testserver/testserver.go
@@ -87,6 +87,7 @@ func (c *Config) Complete() (RunnableTestServer, error) {
 				MaxBulkExportRelationshipsLimit: c.MaxBulkExportRelationshipsLimit,
 				DispatchChunkSize:               defaultMaxChunkSize,
 				ExpiringRelationshipsEnabled:    true,
+				DeprecatedRelationshipsEnabled:  true,
 				CaveatTypeSet:                   cts,
 			},
 			1*time.Second,
diff --git a/pkg/development/devcontext.go b/pkg/development/devcontext.go
index 87ddfc0487..80302ca89b 100644
--- a/pkg/development/devcontext.go
+++ b/pkg/development/devcontext.go
@@ -173,6 +173,7 @@ func (dc *DevContext) RunV1InMemoryService() (*grpc.ClientConn, func(), error) {
 		MaximumAPIDepth:                  50,
 		MaxCaveatContextSize:             0,
 		ExpiringRelationshipsEnabled:     true,
+		DeprecatedRelationshipsEnabled:   true,
 		CaveatTypeSet:                    caveattypes.Default.TypeSet,
 		PerformanceInsightMetricsEnabled: false,
 	})
@@ -180,6 +181,7 @@ func (dc *DevContext) RunV1InMemoryService() (*grpc.ClientConn, func(), error) {
 		CaveatTypeSet:                    caveattypes.Default.TypeSet,
 		AdditiveOnly:                     false,
 		ExpiringRelsEnabled:              true,
+		DeprecatedRelsEnabled:            true,
 		PerformanceInsightMetricsEnabled: false,
 	})
 
diff --git a/pkg/diff/namespace/diff.go b/pkg/diff/namespace/diff.go
index af50f0fb51..889c2ac7fc 100644
--- a/pkg/diff/namespace/diff.go
+++ b/pkg/diff/namespace/diff.go
@@ -60,6 +60,9 @@ const (
 
 	// ChangedRelationComment indicates that the comment of the relation has changed in some way.
 	ChangedRelationComment DeltaType = "changed-relation-comment"
+
+	// ChangedDeprecation indicates that the deprecation status of the relation has changed.
+	ChangedDeprecation DeltaType = "changed-deprecation"
 )
 
 // Diff holds the diff between two namespaces.
@@ -129,6 +132,12 @@ func DiffNamespaces(existing *core.NamespaceDefinition, updated *core.NamespaceD
 		})
 	}
 
+	if existing.Deprecation != updated.Deprecation {
+		deltas = append(deltas, Delta{
+			Type: ChangedDeprecation,
+		})
+	}
+
 	// Collect up relations and check.
 	existingRels := map[string]*core.Relation{}
 	existingRelNames := mapz.NewSet[string]()
@@ -240,6 +249,14 @@ func DiffNamespaces(existing *core.NamespaceDefinition, updated *core.NamespaceD
 			})
 		}
 
+		// Compare deprecation status
+		if existingRel.Deprecation != updatedRel.Deprecation {
+			deltas = append(deltas, Delta{
+				Type:         ChangedDeprecation,
+				RelationName: shared,
+			})
+		}
+
 		// Compare comments.
 		existingComments := nspkg.GetComments(existingRel.Metadata)
 		updatedComments := nspkg.GetComments(updatedRel.Metadata)
diff --git a/pkg/diff/namespace/diff_test.go b/pkg/diff/namespace/diff_test.go
index 301a7d5c19..ac6b71d955 100644
--- a/pkg/diff/namespace/diff_test.go
+++ b/pkg/diff/namespace/diff_test.go
@@ -571,6 +571,40 @@ func TestNamespaceDiff(t *testing.T) {
 			),
 			[]Delta{},
 		},
+		{
+			"deprecate relation with an error type",
+			ns.Namespace(
+				"document",
+				ns.MustRelation("somerel", nil, ns.AllowedDeprecatedRelation("foo", "bar", &core.Deprecation{
+					DeprecationType: core.DeprecationType_DEPRECATED_TYPE_UNSPECIFIED,
+				})),
+			),
+			ns.Namespace(
+				"document",
+				ns.MustRelation("somerel", nil, ns.AllowedDeprecatedRelation("foo", "bar", &core.Deprecation{
+					DeprecationType: core.DeprecationType_DEPRECATED_TYPE_ERROR,
+				})),
+			),
+			[]Delta{
+				{Type: ChangedDeprecation, RelationName: "somerel"},
+			},
+		},
+		{
+			"remove deprecation",
+			ns.Namespace(
+				"document",
+				ns.MustRelation("somerel", nil, ns.AllowedDeprecatedRelation("foo", "bar", &core.Deprecation{
+					DeprecationType: core.DeprecationType_DEPRECATED_TYPE_ERROR,
+				})),
+			),
+			ns.Namespace(
+				"document",
+				ns.MustRelation("somerel", nil, ns.AllowedRelation("foo", "bar")),
+			),
+			[]Delta{
+				{Type: ChangedDeprecation, RelationName: "somerel"},
+			},
+		},
 	}
 
 	for _, tc := range testCases {
diff --git a/pkg/namespace/builder.go b/pkg/namespace/builder.go
index cf4c745b4f..982447d582 100644
--- a/pkg/namespace/builder.go
+++ b/pkg/namespace/builder.go
@@ -46,6 +46,10 @@ func Relation(name string, rewrite *core.UsersetRewrite, allowedDirectRelations
 		TypeInformation: typeInfo,
 	}
 
+	if err := setRelationDeprecation(rel, allowedDirectRelations...); err != nil {
+		return nil, spiceerrors.MustBugf("failed to set deprecation type: %s", err.Error())
+	}
+
 	switch {
 	case rewrite != nil && len(allowedDirectRelations) == 0:
 		if err := SetRelationKind(rel, iv1.RelationMetadata_PERMISSION); err != nil {
@@ -94,6 +98,17 @@ func AllowedRelationWithCaveat(namespaceName string, relationName string, withCa
 	}
 }
 
+// AllowedDeprecatedRelation creates a relation reference to an allowed relation that is deprecated.
+func AllowedDeprecatedRelation(namespaceName string, relationName string, deprecation *core.Deprecation) *core.AllowedRelation {
+	return &core.AllowedRelation{
+		Namespace: namespaceName,
+		RelationOrWildcard: &core.AllowedRelation_Relation{
+			Relation: relationName,
+		},
+		Deprecation: deprecation,
+	}
+}
+
 // WithExpiration adds the expiration trait to the allowed relation.
 func WithExpiration(allowedRelation *core.AllowedRelation) *core.AllowedRelation {
 	return &core.AllowedRelation{
@@ -243,6 +258,18 @@ func setOperation(firstChild *core.SetOperation_Child, rest []*core.SetOperation
 	}
 }
 
+// setRelationDeprecationType sets the deprecation type of a relation based on all of the deprecations of allowed direct relations.
+func setRelationDeprecation(relation *core.Relation, allowedDirectRelations ...*core.AllowedRelation) error {
+	if len(allowedDirectRelations) > 0 {
+		for _, allowedRelation := range allowedDirectRelations {
+			if allowedRelation.Deprecation != nil && allowedRelation.Deprecation.DeprecationType != core.DeprecationType_DEPRECATED_TYPE_UNSPECIFIED {
+				relation.Deprecation = allowedRelation.Deprecation
+			}
+		}
+	}
+	return nil
+}
+
 // Nil creates a child for a set operation that references the empty set.
 func Nil() *core.SetOperation_Child {
 	return &core.SetOperation_Child{
diff --git a/pkg/proto/core/v1/core.pb.go b/pkg/proto/core/v1/core.pb.go
index 56ce0f7b95..fdc551b277 100644
--- a/pkg/proto/core/v1/core.pb.go
+++ b/pkg/proto/core/v1/core.pb.go
@@ -24,6 +24,57 @@ const (
 	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
 )
 
+// *
+// DeprecationType is the type of deprecation for a relation.
+type DeprecationType int32
+
+const (
+	DeprecationType_DEPRECATED_TYPE_UNSPECIFIED DeprecationType = 0
+	DeprecationType_DEPRECATED_TYPE_WARNING     DeprecationType = 1
+	DeprecationType_DEPRECATED_TYPE_ERROR       DeprecationType = 2
+)
+
+// Enum value maps for DeprecationType.
+var (
+	DeprecationType_name = map[int32]string{
+		0: "DEPRECATED_TYPE_UNSPECIFIED",
+		1: "DEPRECATED_TYPE_WARNING",
+		2: "DEPRECATED_TYPE_ERROR",
+	}
+	DeprecationType_value = map[string]int32{
+		"DEPRECATED_TYPE_UNSPECIFIED": 0,
+		"DEPRECATED_TYPE_WARNING":     1,
+		"DEPRECATED_TYPE_ERROR":       2,
+	}
+)
+
+func (x DeprecationType) Enum() *DeprecationType {
+	p := new(DeprecationType)
+	*p = x
+	return p
+}
+
+func (x DeprecationType) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (DeprecationType) Descriptor() protoreflect.EnumDescriptor {
+	return file_core_v1_core_proto_enumTypes[0].Descriptor()
+}
+
+func (DeprecationType) Type() protoreflect.EnumType {
+	return &file_core_v1_core_proto_enumTypes[0]
+}
+
+func (x DeprecationType) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use DeprecationType.Descriptor instead.
+func (DeprecationType) EnumDescriptor() ([]byte, []int) {
+	return file_core_v1_core_proto_rawDescGZIP(), []int{0}
+}
+
 type RelationTupleUpdate_Operation int32
 
 const (
@@ -60,11 +111,11 @@ func (x RelationTupleUpdate_Operation) String() string {
 }
 
 func (RelationTupleUpdate_Operation) Descriptor() protoreflect.EnumDescriptor {
-	return file_core_v1_core_proto_enumTypes[0].Descriptor()
+	return file_core_v1_core_proto_enumTypes[1].Descriptor()
 }
 
 func (RelationTupleUpdate_Operation) Type() protoreflect.EnumType {
-	return &file_core_v1_core_proto_enumTypes[0]
+	return &file_core_v1_core_proto_enumTypes[1]
 }
 
 func (x RelationTupleUpdate_Operation) Number() protoreflect.EnumNumber {
@@ -112,11 +163,11 @@ func (x SetOperationUserset_Operation) String() string {
 }
 
 func (SetOperationUserset_Operation) Descriptor() protoreflect.EnumDescriptor {
-	return file_core_v1_core_proto_enumTypes[1].Descriptor()
+	return file_core_v1_core_proto_enumTypes[2].Descriptor()
 }
 
 func (SetOperationUserset_Operation) Type() protoreflect.EnumType {
-	return &file_core_v1_core_proto_enumTypes[1]
+	return &file_core_v1_core_proto_enumTypes[2]
 }
 
 func (x SetOperationUserset_Operation) Number() protoreflect.EnumNumber {
@@ -170,11 +221,11 @@ func (x ReachabilityEntrypoint_ReachabilityEntrypointKind) String() string {
 }
 
 func (ReachabilityEntrypoint_ReachabilityEntrypointKind) Descriptor() protoreflect.EnumDescriptor {
-	return file_core_v1_core_proto_enumTypes[2].Descriptor()
+	return file_core_v1_core_proto_enumTypes[3].Descriptor()
 }
 
 func (ReachabilityEntrypoint_ReachabilityEntrypointKind) Type() protoreflect.EnumType {
-	return &file_core_v1_core_proto_enumTypes[2]
+	return &file_core_v1_core_proto_enumTypes[3]
 }
 
 func (x ReachabilityEntrypoint_ReachabilityEntrypointKind) Number() protoreflect.EnumNumber {
@@ -183,7 +234,7 @@ func (x ReachabilityEntrypoint_ReachabilityEntrypointKind) Number() protoreflect
 
 // Deprecated: Use ReachabilityEntrypoint_ReachabilityEntrypointKind.Descriptor instead.
 func (ReachabilityEntrypoint_ReachabilityEntrypointKind) EnumDescriptor() ([]byte, []int) {
-	return file_core_v1_core_proto_rawDescGZIP(), []int{18, 0}
+	return file_core_v1_core_proto_rawDescGZIP(), []int{19, 0}
 }
 
 type ReachabilityEntrypoint_EntrypointResultStatus int32
@@ -223,11 +274,11 @@ func (x ReachabilityEntrypoint_EntrypointResultStatus) String() string {
 }
 
 func (ReachabilityEntrypoint_EntrypointResultStatus) Descriptor() protoreflect.EnumDescriptor {
-	return file_core_v1_core_proto_enumTypes[3].Descriptor()
+	return file_core_v1_core_proto_enumTypes[4].Descriptor()
 }
 
 func (ReachabilityEntrypoint_EntrypointResultStatus) Type() protoreflect.EnumType {
-	return &file_core_v1_core_proto_enumTypes[3]
+	return &file_core_v1_core_proto_enumTypes[4]
 }
 
 func (x ReachabilityEntrypoint_EntrypointResultStatus) Number() protoreflect.EnumNumber {
@@ -236,7 +287,7 @@ func (x ReachabilityEntrypoint_EntrypointResultStatus) Number() protoreflect.Enu
 
 // Deprecated: Use ReachabilityEntrypoint_EntrypointResultStatus.Descriptor instead.
 func (ReachabilityEntrypoint_EntrypointResultStatus) EnumDescriptor() ([]byte, []int) {
-	return file_core_v1_core_proto_rawDescGZIP(), []int{18, 1}
+	return file_core_v1_core_proto_rawDescGZIP(), []int{19, 1}
 }
 
 type FunctionedTupleToUserset_Function int32
@@ -272,11 +323,11 @@ func (x FunctionedTupleToUserset_Function) String() string {
 }
 
 func (FunctionedTupleToUserset_Function) Descriptor() protoreflect.EnumDescriptor {
-	return file_core_v1_core_proto_enumTypes[4].Descriptor()
+	return file_core_v1_core_proto_enumTypes[5].Descriptor()
 }
 
 func (FunctionedTupleToUserset_Function) Type() protoreflect.EnumType {
-	return &file_core_v1_core_proto_enumTypes[4]
+	return &file_core_v1_core_proto_enumTypes[5]
 }
 
 func (x FunctionedTupleToUserset_Function) Number() protoreflect.EnumNumber {
@@ -285,7 +336,7 @@ func (x FunctionedTupleToUserset_Function) Number() protoreflect.EnumNumber {
 
 // Deprecated: Use FunctionedTupleToUserset_Function.Descriptor instead.
 func (FunctionedTupleToUserset_Function) EnumDescriptor() ([]byte, []int) {
-	return file_core_v1_core_proto_rawDescGZIP(), []int{26, 0}
+	return file_core_v1_core_proto_rawDescGZIP(), []int{27, 0}
 }
 
 type ComputedUserset_Object int32
@@ -318,11 +369,11 @@ func (x ComputedUserset_Object) String() string {
 }
 
 func (ComputedUserset_Object) Descriptor() protoreflect.EnumDescriptor {
-	return file_core_v1_core_proto_enumTypes[5].Descriptor()
+	return file_core_v1_core_proto_enumTypes[6].Descriptor()
 }
 
 func (ComputedUserset_Object) Type() protoreflect.EnumType {
-	return &file_core_v1_core_proto_enumTypes[5]
+	return &file_core_v1_core_proto_enumTypes[6]
 }
 
 func (x ComputedUserset_Object) Number() protoreflect.EnumNumber {
@@ -331,7 +382,7 @@ func (x ComputedUserset_Object) Number() protoreflect.EnumNumber {
 
 // Deprecated: Use ComputedUserset_Object.Descriptor instead.
 func (ComputedUserset_Object) EnumDescriptor() ([]byte, []int) {
-	return file_core_v1_core_proto_rawDescGZIP(), []int{27, 0}
+	return file_core_v1_core_proto_rawDescGZIP(), []int{28, 0}
 }
 
 type CaveatOperation_Operation int32
@@ -370,11 +421,11 @@ func (x CaveatOperation_Operation) String() string {
 }
 
 func (CaveatOperation_Operation) Descriptor() protoreflect.EnumDescriptor {
-	return file_core_v1_core_proto_enumTypes[6].Descriptor()
+	return file_core_v1_core_proto_enumTypes[7].Descriptor()
 }
 
 func (CaveatOperation_Operation) Type() protoreflect.EnumType {
-	return &file_core_v1_core_proto_enumTypes[6]
+	return &file_core_v1_core_proto_enumTypes[7]
 }
 
 func (x CaveatOperation_Operation) Number() protoreflect.EnumNumber {
@@ -383,7 +434,7 @@ func (x CaveatOperation_Operation) Number() protoreflect.EnumNumber {
 
 // Deprecated: Use CaveatOperation_Operation.Descriptor instead.
 func (CaveatOperation_Operation) EnumDescriptor() ([]byte, []int) {
-	return file_core_v1_core_proto_rawDescGZIP(), []int{30, 0}
+	return file_core_v1_core_proto_rawDescGZIP(), []int{31, 0}
 }
 
 type RelationTuple struct {
@@ -1279,6 +1330,8 @@ type NamespaceDefinition struct {
 	Metadata *Metadata `protobuf:"bytes,3,opt,name=metadata,proto3" json:"metadata,omitempty"`
 	// * source_position contains the position of the namespace in the source schema, if any
 	SourcePosition *SourcePosition `protobuf:"bytes,4,opt,name=source_position,json=sourcePosition,proto3" json:"source_position,omitempty"`
+	// * deprecation contains the deprecation information for the namespace, if any
+	Deprecation *Deprecation `protobuf:"bytes,5,opt,name=deprecation,proto3" json:"deprecation,omitempty"`
 }
 
 func (x *NamespaceDefinition) Reset() {
@@ -1341,6 +1394,99 @@ func (x *NamespaceDefinition) GetSourcePosition() *SourcePosition {
 	return nil
 }
 
+func (x *NamespaceDefinition) GetDeprecation() *Deprecation {
+	if x != nil {
+		return x.Deprecation
+	}
+	return nil
+}
+
+type Deprecation struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// *
+	// deprecation_type is the type of deprecation for the relation.
+	// It can be either a warning or an error, defaults to unspecified.
+	DeprecationType DeprecationType `protobuf:"varint,1,opt,name=deprecation_type,json=deprecationType,proto3,enum=core.v1.DeprecationType" json:"deprecation_type,omitempty"`
+	// * object is the object that is deprecated
+	Object string `protobuf:"bytes,2,opt,name=object,proto3" json:"object,omitempty"`
+	// * relation is the relation that is deprecated
+	Relation string `protobuf:"bytes,3,opt,name=relation,proto3" json:"relation,omitempty"`
+	// * comments are the comments to show when the relation is used
+	Comments string `protobuf:"bytes,4,opt,name=comments,proto3" json:"comments,omitempty"`
+	// * source_position contains the position of the deprecation in the source schema, if any
+	SourcePosition *SourcePosition `protobuf:"bytes,5,opt,name=source_position,json=sourcePosition,proto3" json:"source_position,omitempty"`
+}
+
+func (x *Deprecation) Reset() {
+	*x = Deprecation{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_core_v1_core_proto_msgTypes[15]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Deprecation) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Deprecation) ProtoMessage() {}
+
+func (x *Deprecation) ProtoReflect() protoreflect.Message {
+	mi := &file_core_v1_core_proto_msgTypes[15]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Deprecation.ProtoReflect.Descriptor instead.
+func (*Deprecation) Descriptor() ([]byte, []int) {
+	return file_core_v1_core_proto_rawDescGZIP(), []int{15}
+}
+
+func (x *Deprecation) GetDeprecationType() DeprecationType {
+	if x != nil {
+		return x.DeprecationType
+	}
+	return DeprecationType_DEPRECATED_TYPE_UNSPECIFIED
+}
+
+func (x *Deprecation) GetObject() string {
+	if x != nil {
+		return x.Object
+	}
+	return ""
+}
+
+func (x *Deprecation) GetRelation() string {
+	if x != nil {
+		return x.Relation
+	}
+	return ""
+}
+
+func (x *Deprecation) GetComments() string {
+	if x != nil {
+		return x.Comments
+	}
+	return ""
+}
+
+func (x *Deprecation) GetSourcePosition() *SourcePosition {
+	if x != nil {
+		return x.SourcePosition
+	}
+	return nil
+}
+
 // *
 // Relation represents the definition of a relation or permission under a namespace.
 type Relation struct {
@@ -1362,12 +1508,14 @@ type Relation struct {
 	SourcePosition    *SourcePosition `protobuf:"bytes,5,opt,name=source_position,json=sourcePosition,proto3" json:"source_position,omitempty"`
 	AliasingRelation  string          `protobuf:"bytes,6,opt,name=aliasing_relation,json=aliasingRelation,proto3" json:"aliasing_relation,omitempty"`
 	CanonicalCacheKey string          `protobuf:"bytes,7,opt,name=canonical_cache_key,json=canonicalCacheKey,proto3" json:"canonical_cache_key,omitempty"`
+	// * deprecation_type is the type of deprecation for the relation
+	Deprecation *Deprecation `protobuf:"bytes,8,opt,name=deprecation,proto3" json:"deprecation,omitempty"`
 }
 
 func (x *Relation) Reset() {
 	*x = Relation{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_core_v1_core_proto_msgTypes[15]
+		mi := &file_core_v1_core_proto_msgTypes[16]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1380,7 +1528,7 @@ func (x *Relation) String() string {
 func (*Relation) ProtoMessage() {}
 
 func (x *Relation) ProtoReflect() protoreflect.Message {
-	mi := &file_core_v1_core_proto_msgTypes[15]
+	mi := &file_core_v1_core_proto_msgTypes[16]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1393,7 +1541,7 @@ func (x *Relation) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use Relation.ProtoReflect.Descriptor instead.
 func (*Relation) Descriptor() ([]byte, []int) {
-	return file_core_v1_core_proto_rawDescGZIP(), []int{15}
+	return file_core_v1_core_proto_rawDescGZIP(), []int{16}
 }
 
 func (x *Relation) GetName() string {
@@ -1445,6 +1593,13 @@ func (x *Relation) GetCanonicalCacheKey() string {
 	return ""
 }
 
+func (x *Relation) GetDeprecation() *Deprecation {
+	if x != nil {
+		return x.Deprecation
+	}
+	return nil
+}
+
 // *
 // ReachabilityGraph is a serialized form of a reachability graph, representing how a relation can
 // be reached from one or more subject types.
@@ -1495,7 +1650,7 @@ type ReachabilityGraph struct {
 func (x *ReachabilityGraph) Reset() {
 	*x = ReachabilityGraph{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_core_v1_core_proto_msgTypes[16]
+		mi := &file_core_v1_core_proto_msgTypes[17]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1508,7 +1663,7 @@ func (x *ReachabilityGraph) String() string {
 func (*ReachabilityGraph) ProtoMessage() {}
 
 func (x *ReachabilityGraph) ProtoReflect() protoreflect.Message {
-	mi := &file_core_v1_core_proto_msgTypes[16]
+	mi := &file_core_v1_core_proto_msgTypes[17]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1521,7 +1676,7 @@ func (x *ReachabilityGraph) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ReachabilityGraph.ProtoReflect.Descriptor instead.
 func (*ReachabilityGraph) Descriptor() ([]byte, []int) {
-	return file_core_v1_core_proto_rawDescGZIP(), []int{16}
+	return file_core_v1_core_proto_rawDescGZIP(), []int{17}
 }
 
 func (x *ReachabilityGraph) GetEntrypointsBySubjectType() map[string]*ReachabilityEntrypoints {
@@ -1562,7 +1717,7 @@ type ReachabilityEntrypoints struct {
 func (x *ReachabilityEntrypoints) Reset() {
 	*x = ReachabilityEntrypoints{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_core_v1_core_proto_msgTypes[17]
+		mi := &file_core_v1_core_proto_msgTypes[18]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1575,7 +1730,7 @@ func (x *ReachabilityEntrypoints) String() string {
 func (*ReachabilityEntrypoints) ProtoMessage() {}
 
 func (x *ReachabilityEntrypoints) ProtoReflect() protoreflect.Message {
-	mi := &file_core_v1_core_proto_msgTypes[17]
+	mi := &file_core_v1_core_proto_msgTypes[18]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1588,7 +1743,7 @@ func (x *ReachabilityEntrypoints) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ReachabilityEntrypoints.ProtoReflect.Descriptor instead.
 func (*ReachabilityEntrypoints) Descriptor() ([]byte, []int) {
-	return file_core_v1_core_proto_rawDescGZIP(), []int{17}
+	return file_core_v1_core_proto_rawDescGZIP(), []int{18}
 }
 
 func (x *ReachabilityEntrypoints) GetEntrypoints() []*ReachabilityEntrypoint {
@@ -1643,7 +1798,7 @@ type ReachabilityEntrypoint struct {
 func (x *ReachabilityEntrypoint) Reset() {
 	*x = ReachabilityEntrypoint{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_core_v1_core_proto_msgTypes[18]
+		mi := &file_core_v1_core_proto_msgTypes[19]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1656,7 +1811,7 @@ func (x *ReachabilityEntrypoint) String() string {
 func (*ReachabilityEntrypoint) ProtoMessage() {}
 
 func (x *ReachabilityEntrypoint) ProtoReflect() protoreflect.Message {
-	mi := &file_core_v1_core_proto_msgTypes[18]
+	mi := &file_core_v1_core_proto_msgTypes[19]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1669,7 +1824,7 @@ func (x *ReachabilityEntrypoint) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ReachabilityEntrypoint.ProtoReflect.Descriptor instead.
 func (*ReachabilityEntrypoint) Descriptor() ([]byte, []int) {
-	return file_core_v1_core_proto_rawDescGZIP(), []int{18}
+	return file_core_v1_core_proto_rawDescGZIP(), []int{19}
 }
 
 func (x *ReachabilityEntrypoint) GetKind() ReachabilityEntrypoint_ReachabilityEntrypointKind {
@@ -1723,7 +1878,7 @@ type TypeInformation struct {
 func (x *TypeInformation) Reset() {
 	*x = TypeInformation{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_core_v1_core_proto_msgTypes[19]
+		mi := &file_core_v1_core_proto_msgTypes[20]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1736,7 +1891,7 @@ func (x *TypeInformation) String() string {
 func (*TypeInformation) ProtoMessage() {}
 
 func (x *TypeInformation) ProtoReflect() protoreflect.Message {
-	mi := &file_core_v1_core_proto_msgTypes[19]
+	mi := &file_core_v1_core_proto_msgTypes[20]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1749,7 +1904,7 @@ func (x *TypeInformation) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use TypeInformation.ProtoReflect.Descriptor instead.
 func (*TypeInformation) Descriptor() ([]byte, []int) {
-	return file_core_v1_core_proto_rawDescGZIP(), []int{19}
+	return file_core_v1_core_proto_rawDescGZIP(), []int{20}
 }
 
 func (x *TypeInformation) GetAllowedDirectRelations() []*AllowedRelation {
@@ -1784,12 +1939,15 @@ type AllowedRelation struct {
 	// *
 	// required_expiration defines the required expiration on this relation.
 	RequiredExpiration *ExpirationTrait `protobuf:"bytes,7,opt,name=required_expiration,json=requiredExpiration,proto3" json:"required_expiration,omitempty"`
+	// *
+	// deprecation_type defines the type of deprecation for this relation.
+	Deprecation *Deprecation `protobuf:"bytes,8,opt,name=deprecation,proto3" json:"deprecation,omitempty"`
 }
 
 func (x *AllowedRelation) Reset() {
 	*x = AllowedRelation{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_core_v1_core_proto_msgTypes[20]
+		mi := &file_core_v1_core_proto_msgTypes[21]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1802,7 +1960,7 @@ func (x *AllowedRelation) String() string {
 func (*AllowedRelation) ProtoMessage() {}
 
 func (x *AllowedRelation) ProtoReflect() protoreflect.Message {
-	mi := &file_core_v1_core_proto_msgTypes[20]
+	mi := &file_core_v1_core_proto_msgTypes[21]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1815,7 +1973,7 @@ func (x *AllowedRelation) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use AllowedRelation.ProtoReflect.Descriptor instead.
 func (*AllowedRelation) Descriptor() ([]byte, []int) {
-	return file_core_v1_core_proto_rawDescGZIP(), []int{20}
+	return file_core_v1_core_proto_rawDescGZIP(), []int{21}
 }
 
 func (x *AllowedRelation) GetNamespace() string {
@@ -1867,6 +2025,13 @@ func (x *AllowedRelation) GetRequiredExpiration() *ExpirationTrait {
 	return nil
 }
 
+func (x *AllowedRelation) GetDeprecation() *Deprecation {
+	if x != nil {
+		return x.Deprecation
+	}
+	return nil
+}
+
 type isAllowedRelation_RelationOrWildcard interface {
 	isAllowedRelation_RelationOrWildcard()
 }
@@ -1894,7 +2059,7 @@ type ExpirationTrait struct {
 func (x *ExpirationTrait) Reset() {
 	*x = ExpirationTrait{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_core_v1_core_proto_msgTypes[21]
+		mi := &file_core_v1_core_proto_msgTypes[22]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1907,7 +2072,7 @@ func (x *ExpirationTrait) String() string {
 func (*ExpirationTrait) ProtoMessage() {}
 
 func (x *ExpirationTrait) ProtoReflect() protoreflect.Message {
-	mi := &file_core_v1_core_proto_msgTypes[21]
+	mi := &file_core_v1_core_proto_msgTypes[22]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1920,7 +2085,7 @@ func (x *ExpirationTrait) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ExpirationTrait.ProtoReflect.Descriptor instead.
 func (*ExpirationTrait) Descriptor() ([]byte, []int) {
-	return file_core_v1_core_proto_rawDescGZIP(), []int{21}
+	return file_core_v1_core_proto_rawDescGZIP(), []int{22}
 }
 
 // *
@@ -1938,7 +2103,7 @@ type AllowedCaveat struct {
 func (x *AllowedCaveat) Reset() {
 	*x = AllowedCaveat{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_core_v1_core_proto_msgTypes[22]
+		mi := &file_core_v1_core_proto_msgTypes[23]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1951,7 +2116,7 @@ func (x *AllowedCaveat) String() string {
 func (*AllowedCaveat) ProtoMessage() {}
 
 func (x *AllowedCaveat) ProtoReflect() protoreflect.Message {
-	mi := &file_core_v1_core_proto_msgTypes[22]
+	mi := &file_core_v1_core_proto_msgTypes[23]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1964,7 +2129,7 @@ func (x *AllowedCaveat) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use AllowedCaveat.ProtoReflect.Descriptor instead.
 func (*AllowedCaveat) Descriptor() ([]byte, []int) {
-	return file_core_v1_core_proto_rawDescGZIP(), []int{22}
+	return file_core_v1_core_proto_rawDescGZIP(), []int{23}
 }
 
 func (x *AllowedCaveat) GetCaveatName() string {
@@ -1991,7 +2156,7 @@ type UsersetRewrite struct {
 func (x *UsersetRewrite) Reset() {
 	*x = UsersetRewrite{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_core_v1_core_proto_msgTypes[23]
+		mi := &file_core_v1_core_proto_msgTypes[24]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2004,7 +2169,7 @@ func (x *UsersetRewrite) String() string {
 func (*UsersetRewrite) ProtoMessage() {}
 
 func (x *UsersetRewrite) ProtoReflect() protoreflect.Message {
-	mi := &file_core_v1_core_proto_msgTypes[23]
+	mi := &file_core_v1_core_proto_msgTypes[24]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2017,7 +2182,7 @@ func (x *UsersetRewrite) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use UsersetRewrite.ProtoReflect.Descriptor instead.
 func (*UsersetRewrite) Descriptor() ([]byte, []int) {
-	return file_core_v1_core_proto_rawDescGZIP(), []int{23}
+	return file_core_v1_core_proto_rawDescGZIP(), []int{24}
 }
 
 func (m *UsersetRewrite) GetRewriteOperation() isUsersetRewrite_RewriteOperation {
@@ -2088,7 +2253,7 @@ type SetOperation struct {
 func (x *SetOperation) Reset() {
 	*x = SetOperation{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_core_v1_core_proto_msgTypes[24]
+		mi := &file_core_v1_core_proto_msgTypes[25]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2101,7 +2266,7 @@ func (x *SetOperation) String() string {
 func (*SetOperation) ProtoMessage() {}
 
 func (x *SetOperation) ProtoReflect() protoreflect.Message {
-	mi := &file_core_v1_core_proto_msgTypes[24]
+	mi := &file_core_v1_core_proto_msgTypes[25]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2114,7 +2279,7 @@ func (x *SetOperation) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SetOperation.ProtoReflect.Descriptor instead.
 func (*SetOperation) Descriptor() ([]byte, []int) {
-	return file_core_v1_core_proto_rawDescGZIP(), []int{24}
+	return file_core_v1_core_proto_rawDescGZIP(), []int{25}
 }
 
 func (x *SetOperation) GetChild() []*SetOperation_Child {
@@ -2137,7 +2302,7 @@ type TupleToUserset struct {
 func (x *TupleToUserset) Reset() {
 	*x = TupleToUserset{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_core_v1_core_proto_msgTypes[25]
+		mi := &file_core_v1_core_proto_msgTypes[26]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2150,7 +2315,7 @@ func (x *TupleToUserset) String() string {
 func (*TupleToUserset) ProtoMessage() {}
 
 func (x *TupleToUserset) ProtoReflect() protoreflect.Message {
-	mi := &file_core_v1_core_proto_msgTypes[25]
+	mi := &file_core_v1_core_proto_msgTypes[26]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2163,7 +2328,7 @@ func (x *TupleToUserset) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use TupleToUserset.ProtoReflect.Descriptor instead.
 func (*TupleToUserset) Descriptor() ([]byte, []int) {
-	return file_core_v1_core_proto_rawDescGZIP(), []int{25}
+	return file_core_v1_core_proto_rawDescGZIP(), []int{26}
 }
 
 func (x *TupleToUserset) GetTupleset() *TupleToUserset_Tupleset {
@@ -2201,7 +2366,7 @@ type FunctionedTupleToUserset struct {
 func (x *FunctionedTupleToUserset) Reset() {
 	*x = FunctionedTupleToUserset{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_core_v1_core_proto_msgTypes[26]
+		mi := &file_core_v1_core_proto_msgTypes[27]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2214,7 +2379,7 @@ func (x *FunctionedTupleToUserset) String() string {
 func (*FunctionedTupleToUserset) ProtoMessage() {}
 
 func (x *FunctionedTupleToUserset) ProtoReflect() protoreflect.Message {
-	mi := &file_core_v1_core_proto_msgTypes[26]
+	mi := &file_core_v1_core_proto_msgTypes[27]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2227,7 +2392,7 @@ func (x *FunctionedTupleToUserset) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use FunctionedTupleToUserset.ProtoReflect.Descriptor instead.
 func (*FunctionedTupleToUserset) Descriptor() ([]byte, []int) {
-	return file_core_v1_core_proto_rawDescGZIP(), []int{26}
+	return file_core_v1_core_proto_rawDescGZIP(), []int{27}
 }
 
 func (x *FunctionedTupleToUserset) GetFunction() FunctionedTupleToUserset_Function {
@@ -2271,7 +2436,7 @@ type ComputedUserset struct {
 func (x *ComputedUserset) Reset() {
 	*x = ComputedUserset{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_core_v1_core_proto_msgTypes[27]
+		mi := &file_core_v1_core_proto_msgTypes[28]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2284,7 +2449,7 @@ func (x *ComputedUserset) String() string {
 func (*ComputedUserset) ProtoMessage() {}
 
 func (x *ComputedUserset) ProtoReflect() protoreflect.Message {
-	mi := &file_core_v1_core_proto_msgTypes[27]
+	mi := &file_core_v1_core_proto_msgTypes[28]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2297,7 +2462,7 @@ func (x *ComputedUserset) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ComputedUserset.ProtoReflect.Descriptor instead.
 func (*ComputedUserset) Descriptor() ([]byte, []int) {
-	return file_core_v1_core_proto_rawDescGZIP(), []int{27}
+	return file_core_v1_core_proto_rawDescGZIP(), []int{28}
 }
 
 func (x *ComputedUserset) GetObject() ComputedUserset_Object {
@@ -2333,7 +2498,7 @@ type SourcePosition struct {
 func (x *SourcePosition) Reset() {
 	*x = SourcePosition{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_core_v1_core_proto_msgTypes[28]
+		mi := &file_core_v1_core_proto_msgTypes[29]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2346,7 +2511,7 @@ func (x *SourcePosition) String() string {
 func (*SourcePosition) ProtoMessage() {}
 
 func (x *SourcePosition) ProtoReflect() protoreflect.Message {
-	mi := &file_core_v1_core_proto_msgTypes[28]
+	mi := &file_core_v1_core_proto_msgTypes[29]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2359,7 +2524,7 @@ func (x *SourcePosition) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SourcePosition.ProtoReflect.Descriptor instead.
 func (*SourcePosition) Descriptor() ([]byte, []int) {
-	return file_core_v1_core_proto_rawDescGZIP(), []int{28}
+	return file_core_v1_core_proto_rawDescGZIP(), []int{29}
 }
 
 func (x *SourcePosition) GetZeroIndexedLineNumber() uint64 {
@@ -2391,7 +2556,7 @@ type CaveatExpression struct {
 func (x *CaveatExpression) Reset() {
 	*x = CaveatExpression{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_core_v1_core_proto_msgTypes[29]
+		mi := &file_core_v1_core_proto_msgTypes[30]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2404,7 +2569,7 @@ func (x *CaveatExpression) String() string {
 func (*CaveatExpression) ProtoMessage() {}
 
 func (x *CaveatExpression) ProtoReflect() protoreflect.Message {
-	mi := &file_core_v1_core_proto_msgTypes[29]
+	mi := &file_core_v1_core_proto_msgTypes[30]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2417,7 +2582,7 @@ func (x *CaveatExpression) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use CaveatExpression.ProtoReflect.Descriptor instead.
 func (*CaveatExpression) Descriptor() ([]byte, []int) {
-	return file_core_v1_core_proto_rawDescGZIP(), []int{29}
+	return file_core_v1_core_proto_rawDescGZIP(), []int{30}
 }
 
 func (m *CaveatExpression) GetOperationOrCaveat() isCaveatExpression_OperationOrCaveat {
@@ -2469,7 +2634,7 @@ type CaveatOperation struct {
 func (x *CaveatOperation) Reset() {
 	*x = CaveatOperation{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_core_v1_core_proto_msgTypes[30]
+		mi := &file_core_v1_core_proto_msgTypes[31]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2482,7 +2647,7 @@ func (x *CaveatOperation) String() string {
 func (*CaveatOperation) ProtoMessage() {}
 
 func (x *CaveatOperation) ProtoReflect() protoreflect.Message {
-	mi := &file_core_v1_core_proto_msgTypes[30]
+	mi := &file_core_v1_core_proto_msgTypes[31]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2495,7 +2660,7 @@ func (x *CaveatOperation) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use CaveatOperation.ProtoReflect.Descriptor instead.
 func (*CaveatOperation) Descriptor() ([]byte, []int) {
-	return file_core_v1_core_proto_rawDescGZIP(), []int{30}
+	return file_core_v1_core_proto_rawDescGZIP(), []int{31}
 }
 
 func (x *CaveatOperation) GetOp() CaveatOperation_Operation {
@@ -2535,7 +2700,7 @@ type RelationshipFilter struct {
 func (x *RelationshipFilter) Reset() {
 	*x = RelationshipFilter{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_core_v1_core_proto_msgTypes[31]
+		mi := &file_core_v1_core_proto_msgTypes[32]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2548,7 +2713,7 @@ func (x *RelationshipFilter) String() string {
 func (*RelationshipFilter) ProtoMessage() {}
 
 func (x *RelationshipFilter) ProtoReflect() protoreflect.Message {
-	mi := &file_core_v1_core_proto_msgTypes[31]
+	mi := &file_core_v1_core_proto_msgTypes[32]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2561,7 +2726,7 @@ func (x *RelationshipFilter) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use RelationshipFilter.ProtoReflect.Descriptor instead.
 func (*RelationshipFilter) Descriptor() ([]byte, []int) {
-	return file_core_v1_core_proto_rawDescGZIP(), []int{31}
+	return file_core_v1_core_proto_rawDescGZIP(), []int{32}
 }
 
 func (x *RelationshipFilter) GetResourceType() string {
@@ -2616,7 +2781,7 @@ type SubjectFilter struct {
 func (x *SubjectFilter) Reset() {
 	*x = SubjectFilter{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_core_v1_core_proto_msgTypes[32]
+		mi := &file_core_v1_core_proto_msgTypes[33]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2629,7 +2794,7 @@ func (x *SubjectFilter) String() string {
 func (*SubjectFilter) ProtoMessage() {}
 
 func (x *SubjectFilter) ProtoReflect() protoreflect.Message {
-	mi := &file_core_v1_core_proto_msgTypes[32]
+	mi := &file_core_v1_core_proto_msgTypes[33]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2642,7 +2807,7 @@ func (x *SubjectFilter) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SubjectFilter.ProtoReflect.Descriptor instead.
 func (*SubjectFilter) Descriptor() ([]byte, []int) {
-	return file_core_v1_core_proto_rawDescGZIP(), []int{32}
+	return file_core_v1_core_proto_rawDescGZIP(), []int{33}
 }
 
 func (x *SubjectFilter) GetSubjectType() string {
@@ -2675,7 +2840,7 @@ type AllowedRelation_PublicWildcard struct {
 func (x *AllowedRelation_PublicWildcard) Reset() {
 	*x = AllowedRelation_PublicWildcard{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_core_v1_core_proto_msgTypes[36]
+		mi := &file_core_v1_core_proto_msgTypes[37]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2688,7 +2853,7 @@ func (x *AllowedRelation_PublicWildcard) String() string {
 func (*AllowedRelation_PublicWildcard) ProtoMessage() {}
 
 func (x *AllowedRelation_PublicWildcard) ProtoReflect() protoreflect.Message {
-	mi := &file_core_v1_core_proto_msgTypes[36]
+	mi := &file_core_v1_core_proto_msgTypes[37]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2701,7 +2866,7 @@ func (x *AllowedRelation_PublicWildcard) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use AllowedRelation_PublicWildcard.ProtoReflect.Descriptor instead.
 func (*AllowedRelation_PublicWildcard) Descriptor() ([]byte, []int) {
-	return file_core_v1_core_proto_rawDescGZIP(), []int{20, 0}
+	return file_core_v1_core_proto_rawDescGZIP(), []int{21, 0}
 }
 
 type SetOperation_Child struct {
@@ -2730,7 +2895,7 @@ type SetOperation_Child struct {
 func (x *SetOperation_Child) Reset() {
 	*x = SetOperation_Child{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_core_v1_core_proto_msgTypes[37]
+		mi := &file_core_v1_core_proto_msgTypes[38]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2743,7 +2908,7 @@ func (x *SetOperation_Child) String() string {
 func (*SetOperation_Child) ProtoMessage() {}
 
 func (x *SetOperation_Child) ProtoReflect() protoreflect.Message {
-	mi := &file_core_v1_core_proto_msgTypes[37]
+	mi := &file_core_v1_core_proto_msgTypes[38]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2756,7 +2921,7 @@ func (x *SetOperation_Child) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SetOperation_Child.ProtoReflect.Descriptor instead.
 func (*SetOperation_Child) Descriptor() ([]byte, []int) {
-	return file_core_v1_core_proto_rawDescGZIP(), []int{24, 0}
+	return file_core_v1_core_proto_rawDescGZIP(), []int{25, 0}
 }
 
 func (m *SetOperation_Child) GetChildType() isSetOperation_Child_ChildType {
@@ -2871,7 +3036,7 @@ type SetOperation_Child_This struct {
 func (x *SetOperation_Child_This) Reset() {
 	*x = SetOperation_Child_This{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_core_v1_core_proto_msgTypes[38]
+		mi := &file_core_v1_core_proto_msgTypes[39]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2884,7 +3049,7 @@ func (x *SetOperation_Child_This) String() string {
 func (*SetOperation_Child_This) ProtoMessage() {}
 
 func (x *SetOperation_Child_This) ProtoReflect() protoreflect.Message {
-	mi := &file_core_v1_core_proto_msgTypes[38]
+	mi := &file_core_v1_core_proto_msgTypes[39]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2897,7 +3062,7 @@ func (x *SetOperation_Child_This) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SetOperation_Child_This.ProtoReflect.Descriptor instead.
 func (*SetOperation_Child_This) Descriptor() ([]byte, []int) {
-	return file_core_v1_core_proto_rawDescGZIP(), []int{24, 0, 0}
+	return file_core_v1_core_proto_rawDescGZIP(), []int{25, 0, 0}
 }
 
 type SetOperation_Child_Nil struct {
@@ -2909,7 +3074,7 @@ type SetOperation_Child_Nil struct {
 func (x *SetOperation_Child_Nil) Reset() {
 	*x = SetOperation_Child_Nil{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_core_v1_core_proto_msgTypes[39]
+		mi := &file_core_v1_core_proto_msgTypes[40]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2922,7 +3087,7 @@ func (x *SetOperation_Child_Nil) String() string {
 func (*SetOperation_Child_Nil) ProtoMessage() {}
 
 func (x *SetOperation_Child_Nil) ProtoReflect() protoreflect.Message {
-	mi := &file_core_v1_core_proto_msgTypes[39]
+	mi := &file_core_v1_core_proto_msgTypes[40]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2935,7 +3100,7 @@ func (x *SetOperation_Child_Nil) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SetOperation_Child_Nil.ProtoReflect.Descriptor instead.
 func (*SetOperation_Child_Nil) Descriptor() ([]byte, []int) {
-	return file_core_v1_core_proto_rawDescGZIP(), []int{24, 0, 1}
+	return file_core_v1_core_proto_rawDescGZIP(), []int{25, 0, 1}
 }
 
 type TupleToUserset_Tupleset struct {
@@ -2949,7 +3114,7 @@ type TupleToUserset_Tupleset struct {
 func (x *TupleToUserset_Tupleset) Reset() {
 	*x = TupleToUserset_Tupleset{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_core_v1_core_proto_msgTypes[40]
+		mi := &file_core_v1_core_proto_msgTypes[41]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2962,7 +3127,7 @@ func (x *TupleToUserset_Tupleset) String() string {
 func (*TupleToUserset_Tupleset) ProtoMessage() {}
 
 func (x *TupleToUserset_Tupleset) ProtoReflect() protoreflect.Message {
-	mi := &file_core_v1_core_proto_msgTypes[40]
+	mi := &file_core_v1_core_proto_msgTypes[41]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2975,7 +3140,7 @@ func (x *TupleToUserset_Tupleset) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use TupleToUserset_Tupleset.ProtoReflect.Descriptor instead.
 func (*TupleToUserset_Tupleset) Descriptor() ([]byte, []int) {
-	return file_core_v1_core_proto_rawDescGZIP(), []int{25, 0}
+	return file_core_v1_core_proto_rawDescGZIP(), []int{26, 0}
 }
 
 func (x *TupleToUserset_Tupleset) GetRelation() string {
@@ -2996,7 +3161,7 @@ type FunctionedTupleToUserset_Tupleset struct {
 func (x *FunctionedTupleToUserset_Tupleset) Reset() {
 	*x = FunctionedTupleToUserset_Tupleset{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_core_v1_core_proto_msgTypes[41]
+		mi := &file_core_v1_core_proto_msgTypes[42]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -3009,7 +3174,7 @@ func (x *FunctionedTupleToUserset_Tupleset) String() string {
 func (*FunctionedTupleToUserset_Tupleset) ProtoMessage() {}
 
 func (x *FunctionedTupleToUserset_Tupleset) ProtoReflect() protoreflect.Message {
-	mi := &file_core_v1_core_proto_msgTypes[41]
+	mi := &file_core_v1_core_proto_msgTypes[42]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -3022,7 +3187,7 @@ func (x *FunctionedTupleToUserset_Tupleset) ProtoReflect() protoreflect.Message
 
 // Deprecated: Use FunctionedTupleToUserset_Tupleset.ProtoReflect.Descriptor instead.
 func (*FunctionedTupleToUserset_Tupleset) Descriptor() ([]byte, []int) {
-	return file_core_v1_core_proto_rawDescGZIP(), []int{26, 0}
+	return file_core_v1_core_proto_rawDescGZIP(), []int{27, 0}
 }
 
 func (x *FunctionedTupleToUserset_Tupleset) GetRelation() string {
@@ -3043,7 +3208,7 @@ type SubjectFilter_RelationFilter struct {
 func (x *SubjectFilter_RelationFilter) Reset() {
 	*x = SubjectFilter_RelationFilter{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_core_v1_core_proto_msgTypes[42]
+		mi := &file_core_v1_core_proto_msgTypes[43]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -3056,7 +3221,7 @@ func (x *SubjectFilter_RelationFilter) String() string {
 func (*SubjectFilter_RelationFilter) ProtoMessage() {}
 
 func (x *SubjectFilter_RelationFilter) ProtoReflect() protoreflect.Message {
-	mi := &file_core_v1_core_proto_msgTypes[42]
+	mi := &file_core_v1_core_proto_msgTypes[43]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -3069,7 +3234,7 @@ func (x *SubjectFilter_RelationFilter) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SubjectFilter_RelationFilter.ProtoReflect.Descriptor instead.
 func (*SubjectFilter_RelationFilter) Descriptor() ([]byte, []int) {
-	return file_core_v1_core_proto_rawDescGZIP(), []int{32, 0}
+	return file_core_v1_core_proto_rawDescGZIP(), []int{33, 0}
 }
 
 func (x *SubjectFilter_RelationFilter) GetRelation() string {
@@ -3276,7 +3441,7 @@ var file_core_v1_core_proto_rawDesc = []byte{
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 }
 
 var (
@@ -3685,141 +3882,148 @@ func file_core_v1_core_proto_rawDescGZIP() []byte {
 	return file_core_v1_core_proto_rawDescData
 }
 
-var file_core_v1_core_proto_enumTypes = make([]protoimpl.EnumInfo, 7)
-var file_core_v1_core_proto_msgTypes = make([]protoimpl.MessageInfo, 43)
+var file_core_v1_core_proto_enumTypes = make([]protoimpl.EnumInfo, 8)
+var file_core_v1_core_proto_msgTypes = make([]protoimpl.MessageInfo, 44)
 var file_core_v1_core_proto_goTypes = []any{
-	(RelationTupleUpdate_Operation)(0),                     // 0: core.v1.RelationTupleUpdate.Operation
-	(SetOperationUserset_Operation)(0),                     // 1: core.v1.SetOperationUserset.Operation
-	(ReachabilityEntrypoint_ReachabilityEntrypointKind)(0), // 2: core.v1.ReachabilityEntrypoint.ReachabilityEntrypointKind
-	(ReachabilityEntrypoint_EntrypointResultStatus)(0),     // 3: core.v1.ReachabilityEntrypoint.EntrypointResultStatus
-	(FunctionedTupleToUserset_Function)(0),                 // 4: core.v1.FunctionedTupleToUserset.Function
-	(ComputedUserset_Object)(0),                            // 5: core.v1.ComputedUserset.Object
-	(CaveatOperation_Operation)(0),                         // 6: core.v1.CaveatOperation.Operation
-	(*RelationTuple)(nil),                                  // 7: core.v1.RelationTuple
-	(*RelationshipIntegrity)(nil),                          // 8: core.v1.RelationshipIntegrity
-	(*ContextualizedCaveat)(nil),                           // 9: core.v1.ContextualizedCaveat
-	(*CaveatDefinition)(nil),                               // 10: core.v1.CaveatDefinition
-	(*CaveatTypeReference)(nil),                            // 11: core.v1.CaveatTypeReference
-	(*ObjectAndRelation)(nil),                              // 12: core.v1.ObjectAndRelation
-	(*RelationReference)(nil),                              // 13: core.v1.RelationReference
-	(*Zookie)(nil),                                         // 14: core.v1.Zookie
-	(*RelationTupleUpdate)(nil),                            // 15: core.v1.RelationTupleUpdate
-	(*RelationTupleTreeNode)(nil),                          // 16: core.v1.RelationTupleTreeNode
-	(*SetOperationUserset)(nil),                            // 17: core.v1.SetOperationUserset
-	(*DirectSubject)(nil),                                  // 18: core.v1.DirectSubject
-	(*DirectSubjects)(nil),                                 // 19: core.v1.DirectSubjects
-	(*Metadata)(nil),                                       // 20: core.v1.Metadata
-	(*NamespaceDefinition)(nil),                            // 21: core.v1.NamespaceDefinition
-	(*Relation)(nil),                                       // 22: core.v1.Relation
-	(*ReachabilityGraph)(nil),                              // 23: core.v1.ReachabilityGraph
-	(*ReachabilityEntrypoints)(nil),                        // 24: core.v1.ReachabilityEntrypoints
-	(*ReachabilityEntrypoint)(nil),                         // 25: core.v1.ReachabilityEntrypoint
-	(*TypeInformation)(nil),                                // 26: core.v1.TypeInformation
-	(*AllowedRelation)(nil),                                // 27: core.v1.AllowedRelation
-	(*ExpirationTrait)(nil),                                // 28: core.v1.ExpirationTrait
-	(*AllowedCaveat)(nil),                                  // 29: core.v1.AllowedCaveat
-	(*UsersetRewrite)(nil),                                 // 30: core.v1.UsersetRewrite
-	(*SetOperation)(nil),                                   // 31: core.v1.SetOperation
-	(*TupleToUserset)(nil),                                 // 32: core.v1.TupleToUserset
-	(*FunctionedTupleToUserset)(nil),                       // 33: core.v1.FunctionedTupleToUserset
-	(*ComputedUserset)(nil),                                // 34: core.v1.ComputedUserset
-	(*SourcePosition)(nil),                                 // 35: core.v1.SourcePosition
-	(*CaveatExpression)(nil),                               // 36: core.v1.CaveatExpression
-	(*CaveatOperation)(nil),                                // 37: core.v1.CaveatOperation
-	(*RelationshipFilter)(nil),                             // 38: core.v1.RelationshipFilter
-	(*SubjectFilter)(nil),                                  // 39: core.v1.SubjectFilter
-	nil,                                                    // 40: core.v1.CaveatDefinition.ParameterTypesEntry
-	nil,                                                    // 41: core.v1.ReachabilityGraph.EntrypointsBySubjectTypeEntry
-	nil,                                                    // 42: core.v1.ReachabilityGraph.EntrypointsBySubjectRelationEntry
-	(*AllowedRelation_PublicWildcard)(nil),                 // 43: core.v1.AllowedRelation.PublicWildcard
-	(*SetOperation_Child)(nil),                             // 44: core.v1.SetOperation.Child
-	(*SetOperation_Child_This)(nil),                        // 45: core.v1.SetOperation.Child.This
-	(*SetOperation_Child_Nil)(nil),                         // 46: core.v1.SetOperation.Child.Nil
-	(*TupleToUserset_Tupleset)(nil),                        // 47: core.v1.TupleToUserset.Tupleset
-	(*FunctionedTupleToUserset_Tupleset)(nil),              // 48: core.v1.FunctionedTupleToUserset.Tupleset
-	(*SubjectFilter_RelationFilter)(nil),                   // 49: core.v1.SubjectFilter.RelationFilter
-	(*timestamppb.Timestamp)(nil),                          // 50: google.protobuf.Timestamp
-	(*structpb.Struct)(nil),                                // 51: google.protobuf.Struct
-	(*anypb.Any)(nil),                                      // 52: google.protobuf.Any
+	(DeprecationType)(0),                                   // 0: core.v1.DeprecationType
+	(RelationTupleUpdate_Operation)(0),                     // 1: core.v1.RelationTupleUpdate.Operation
+	(SetOperationUserset_Operation)(0),                     // 2: core.v1.SetOperationUserset.Operation
+	(ReachabilityEntrypoint_ReachabilityEntrypointKind)(0), // 3: core.v1.ReachabilityEntrypoint.ReachabilityEntrypointKind
+	(ReachabilityEntrypoint_EntrypointResultStatus)(0),     // 4: core.v1.ReachabilityEntrypoint.EntrypointResultStatus
+	(FunctionedTupleToUserset_Function)(0),                 // 5: core.v1.FunctionedTupleToUserset.Function
+	(ComputedUserset_Object)(0),                            // 6: core.v1.ComputedUserset.Object
+	(CaveatOperation_Operation)(0),                         // 7: core.v1.CaveatOperation.Operation
+	(*RelationTuple)(nil),                                  // 8: core.v1.RelationTuple
+	(*RelationshipIntegrity)(nil),                          // 9: core.v1.RelationshipIntegrity
+	(*ContextualizedCaveat)(nil),                           // 10: core.v1.ContextualizedCaveat
+	(*CaveatDefinition)(nil),                               // 11: core.v1.CaveatDefinition
+	(*CaveatTypeReference)(nil),                            // 12: core.v1.CaveatTypeReference
+	(*ObjectAndRelation)(nil),                              // 13: core.v1.ObjectAndRelation
+	(*RelationReference)(nil),                              // 14: core.v1.RelationReference
+	(*Zookie)(nil),                                         // 15: core.v1.Zookie
+	(*RelationTupleUpdate)(nil),                            // 16: core.v1.RelationTupleUpdate
+	(*RelationTupleTreeNode)(nil),                          // 17: core.v1.RelationTupleTreeNode
+	(*SetOperationUserset)(nil),                            // 18: core.v1.SetOperationUserset
+	(*DirectSubject)(nil),                                  // 19: core.v1.DirectSubject
+	(*DirectSubjects)(nil),                                 // 20: core.v1.DirectSubjects
+	(*Metadata)(nil),                                       // 21: core.v1.Metadata
+	(*NamespaceDefinition)(nil),                            // 22: core.v1.NamespaceDefinition
+	(*Deprecation)(nil),                                    // 23: core.v1.Deprecation
+	(*Relation)(nil),                                       // 24: core.v1.Relation
+	(*ReachabilityGraph)(nil),                              // 25: core.v1.ReachabilityGraph
+	(*ReachabilityEntrypoints)(nil),                        // 26: core.v1.ReachabilityEntrypoints
+	(*ReachabilityEntrypoint)(nil),                         // 27: core.v1.ReachabilityEntrypoint
+	(*TypeInformation)(nil),                                // 28: core.v1.TypeInformation
+	(*AllowedRelation)(nil),                                // 29: core.v1.AllowedRelation
+	(*ExpirationTrait)(nil),                                // 30: core.v1.ExpirationTrait
+	(*AllowedCaveat)(nil),                                  // 31: core.v1.AllowedCaveat
+	(*UsersetRewrite)(nil),                                 // 32: core.v1.UsersetRewrite
+	(*SetOperation)(nil),                                   // 33: core.v1.SetOperation
+	(*TupleToUserset)(nil),                                 // 34: core.v1.TupleToUserset
+	(*FunctionedTupleToUserset)(nil),                       // 35: core.v1.FunctionedTupleToUserset
+	(*ComputedUserset)(nil),                                // 36: core.v1.ComputedUserset
+	(*SourcePosition)(nil),                                 // 37: core.v1.SourcePosition
+	(*CaveatExpression)(nil),                               // 38: core.v1.CaveatExpression
+	(*CaveatOperation)(nil),                                // 39: core.v1.CaveatOperation
+	(*RelationshipFilter)(nil),                             // 40: core.v1.RelationshipFilter
+	(*SubjectFilter)(nil),                                  // 41: core.v1.SubjectFilter
+	nil,                                                    // 42: core.v1.CaveatDefinition.ParameterTypesEntry
+	nil,                                                    // 43: core.v1.ReachabilityGraph.EntrypointsBySubjectTypeEntry
+	nil,                                                    // 44: core.v1.ReachabilityGraph.EntrypointsBySubjectRelationEntry
+	(*AllowedRelation_PublicWildcard)(nil),                 // 45: core.v1.AllowedRelation.PublicWildcard
+	(*SetOperation_Child)(nil),                             // 46: core.v1.SetOperation.Child
+	(*SetOperation_Child_This)(nil),                        // 47: core.v1.SetOperation.Child.This
+	(*SetOperation_Child_Nil)(nil),                         // 48: core.v1.SetOperation.Child.Nil
+	(*TupleToUserset_Tupleset)(nil),                        // 49: core.v1.TupleToUserset.Tupleset
+	(*FunctionedTupleToUserset_Tupleset)(nil),              // 50: core.v1.FunctionedTupleToUserset.Tupleset
+	(*SubjectFilter_RelationFilter)(nil),                   // 51: core.v1.SubjectFilter.RelationFilter
+	(*timestamppb.Timestamp)(nil),                          // 52: google.protobuf.Timestamp
+	(*structpb.Struct)(nil),                                // 53: google.protobuf.Struct
+	(*anypb.Any)(nil),                                      // 54: google.protobuf.Any
 }
 var file_core_v1_core_proto_depIdxs = []int32{
-	12, // 0: core.v1.RelationTuple.resource_and_relation:type_name -> core.v1.ObjectAndRelation
-	12, // 1: core.v1.RelationTuple.subject:type_name -> core.v1.ObjectAndRelation
-	9,  // 2: core.v1.RelationTuple.caveat:type_name -> core.v1.ContextualizedCaveat
-	8,  // 3: core.v1.RelationTuple.integrity:type_name -> core.v1.RelationshipIntegrity
-	50, // 4: core.v1.RelationTuple.optional_expiration_time:type_name -> google.protobuf.Timestamp
-	50, // 5: core.v1.RelationshipIntegrity.hashed_at:type_name -> google.protobuf.Timestamp
-	51, // 6: core.v1.ContextualizedCaveat.context:type_name -> google.protobuf.Struct
-	40, // 7: core.v1.CaveatDefinition.parameter_types:type_name -> core.v1.CaveatDefinition.ParameterTypesEntry
-	20, // 8: core.v1.CaveatDefinition.metadata:type_name -> core.v1.Metadata
-	35, // 9: core.v1.CaveatDefinition.source_position:type_name -> core.v1.SourcePosition
-	11, // 10: core.v1.CaveatTypeReference.child_types:type_name -> core.v1.CaveatTypeReference
-	0,  // 11: core.v1.RelationTupleUpdate.operation:type_name -> core.v1.RelationTupleUpdate.Operation
-	7,  // 12: core.v1.RelationTupleUpdate.tuple:type_name -> core.v1.RelationTuple
-	17, // 13: core.v1.RelationTupleTreeNode.intermediate_node:type_name -> core.v1.SetOperationUserset
-	19, // 14: core.v1.RelationTupleTreeNode.leaf_node:type_name -> core.v1.DirectSubjects
-	12, // 15: core.v1.RelationTupleTreeNode.expanded:type_name -> core.v1.ObjectAndRelation
-	36, // 16: core.v1.RelationTupleTreeNode.caveat_expression:type_name -> core.v1.CaveatExpression
-	1,  // 17: core.v1.SetOperationUserset.operation:type_name -> core.v1.SetOperationUserset.Operation
-	16, // 18: core.v1.SetOperationUserset.child_nodes:type_name -> core.v1.RelationTupleTreeNode
-	12, // 19: core.v1.DirectSubject.subject:type_name -> core.v1.ObjectAndRelation
-	36, // 20: core.v1.DirectSubject.caveat_expression:type_name -> core.v1.CaveatExpression
-	18, // 21: core.v1.DirectSubjects.subjects:type_name -> core.v1.DirectSubject
-	52, // 22: core.v1.Metadata.metadata_message:type_name -> google.protobuf.Any
-	22, // 23: core.v1.NamespaceDefinition.relation:type_name -> core.v1.Relation
-	20, // 24: core.v1.NamespaceDefinition.metadata:type_name -> core.v1.Metadata
-	35, // 25: core.v1.NamespaceDefinition.source_position:type_name -> core.v1.SourcePosition
-	30, // 26: core.v1.Relation.userset_rewrite:type_name -> core.v1.UsersetRewrite
-	26, // 27: core.v1.Relation.type_information:type_name -> core.v1.TypeInformation
-	20, // 28: core.v1.Relation.metadata:type_name -> core.v1.Metadata
-	35, // 29: core.v1.Relation.source_position:type_name -> core.v1.SourcePosition
-	41, // 30: core.v1.ReachabilityGraph.entrypoints_by_subject_type:type_name -> core.v1.ReachabilityGraph.EntrypointsBySubjectTypeEntry
-	42, // 31: core.v1.ReachabilityGraph.entrypoints_by_subject_relation:type_name -> core.v1.ReachabilityGraph.EntrypointsBySubjectRelationEntry
-	25, // 32: core.v1.ReachabilityEntrypoints.entrypoints:type_name -> core.v1.ReachabilityEntrypoint
-	13, // 33: core.v1.ReachabilityEntrypoints.subject_relation:type_name -> core.v1.RelationReference
-	2,  // 34: core.v1.ReachabilityEntrypoint.kind:type_name -> core.v1.ReachabilityEntrypoint.ReachabilityEntrypointKind
-	13, // 35: core.v1.ReachabilityEntrypoint.target_relation:type_name -> core.v1.RelationReference
-	3,  // 36: core.v1.ReachabilityEntrypoint.result_status:type_name -> core.v1.ReachabilityEntrypoint.EntrypointResultStatus
-	27, // 37: core.v1.TypeInformation.allowed_direct_relations:type_name -> core.v1.AllowedRelation
-	43, // 38: core.v1.AllowedRelation.public_wildcard:type_name -> core.v1.AllowedRelation.PublicWildcard
-	35, // 39: core.v1.AllowedRelation.source_position:type_name -> core.v1.SourcePosition
-	29, // 40: core.v1.AllowedRelation.required_caveat:type_name -> core.v1.AllowedCaveat
-	28, // 41: core.v1.AllowedRelation.required_expiration:type_name -> core.v1.ExpirationTrait
-	31, // 42: core.v1.UsersetRewrite.union:type_name -> core.v1.SetOperation
-	31, // 43: core.v1.UsersetRewrite.intersection:type_name -> core.v1.SetOperation
-	31, // 44: core.v1.UsersetRewrite.exclusion:type_name -> core.v1.SetOperation
-	35, // 45: core.v1.UsersetRewrite.source_position:type_name -> core.v1.SourcePosition
-	44, // 46: core.v1.SetOperation.child:type_name -> core.v1.SetOperation.Child
-	47, // 47: core.v1.TupleToUserset.tupleset:type_name -> core.v1.TupleToUserset.Tupleset
-	34, // 48: core.v1.TupleToUserset.computed_userset:type_name -> core.v1.ComputedUserset
-	35, // 49: core.v1.TupleToUserset.source_position:type_name -> core.v1.SourcePosition
-	4,  // 50: core.v1.FunctionedTupleToUserset.function:type_name -> core.v1.FunctionedTupleToUserset.Function
-	48, // 51: core.v1.FunctionedTupleToUserset.tupleset:type_name -> core.v1.FunctionedTupleToUserset.Tupleset
-	34, // 52: core.v1.FunctionedTupleToUserset.computed_userset:type_name -> core.v1.ComputedUserset
-	35, // 53: core.v1.FunctionedTupleToUserset.source_position:type_name -> core.v1.SourcePosition
-	5,  // 54: core.v1.ComputedUserset.object:type_name -> core.v1.ComputedUserset.Object
-	35, // 55: core.v1.ComputedUserset.source_position:type_name -> core.v1.SourcePosition
-	37, // 56: core.v1.CaveatExpression.operation:type_name -> core.v1.CaveatOperation
-	9,  // 57: core.v1.CaveatExpression.caveat:type_name -> core.v1.ContextualizedCaveat
-	6,  // 58: core.v1.CaveatOperation.op:type_name -> core.v1.CaveatOperation.Operation
-	36, // 59: core.v1.CaveatOperation.children:type_name -> core.v1.CaveatExpression
-	39, // 60: core.v1.RelationshipFilter.optional_subject_filter:type_name -> core.v1.SubjectFilter
-	49, // 61: core.v1.SubjectFilter.optional_relation:type_name -> core.v1.SubjectFilter.RelationFilter
-	11, // 62: core.v1.CaveatDefinition.ParameterTypesEntry.value:type_name -> core.v1.CaveatTypeReference
-	24, // 63: core.v1.ReachabilityGraph.EntrypointsBySubjectTypeEntry.value:type_name -> core.v1.ReachabilityEntrypoints
-	24, // 64: core.v1.ReachabilityGraph.EntrypointsBySubjectRelationEntry.value:type_name -> core.v1.ReachabilityEntrypoints
-	45, // 65: core.v1.SetOperation.Child._this:type_name -> core.v1.SetOperation.Child.This
-	34, // 66: core.v1.SetOperation.Child.computed_userset:type_name -> core.v1.ComputedUserset
-	32, // 67: core.v1.SetOperation.Child.tuple_to_userset:type_name -> core.v1.TupleToUserset
-	30, // 68: core.v1.SetOperation.Child.userset_rewrite:type_name -> core.v1.UsersetRewrite
-	33, // 69: core.v1.SetOperation.Child.functioned_tuple_to_userset:type_name -> core.v1.FunctionedTupleToUserset
-	46, // 70: core.v1.SetOperation.Child._nil:type_name -> core.v1.SetOperation.Child.Nil
-	35, // 71: core.v1.SetOperation.Child.source_position:type_name -> core.v1.SourcePosition
-	72, // [72:72] is the sub-list for method output_type
-	72, // [72:72] is the sub-list for method input_type
-	72, // [72:72] is the sub-list for extension type_name
-	72, // [72:72] is the sub-list for extension extendee
-	0,  // [0:72] is the sub-list for field type_name
+	13, // 0: core.v1.RelationTuple.resource_and_relation:type_name -> core.v1.ObjectAndRelation
+	13, // 1: core.v1.RelationTuple.subject:type_name -> core.v1.ObjectAndRelation
+	10, // 2: core.v1.RelationTuple.caveat:type_name -> core.v1.ContextualizedCaveat
+	9,  // 3: core.v1.RelationTuple.integrity:type_name -> core.v1.RelationshipIntegrity
+	52, // 4: core.v1.RelationTuple.optional_expiration_time:type_name -> google.protobuf.Timestamp
+	52, // 5: core.v1.RelationshipIntegrity.hashed_at:type_name -> google.protobuf.Timestamp
+	53, // 6: core.v1.ContextualizedCaveat.context:type_name -> google.protobuf.Struct
+	42, // 7: core.v1.CaveatDefinition.parameter_types:type_name -> core.v1.CaveatDefinition.ParameterTypesEntry
+	21, // 8: core.v1.CaveatDefinition.metadata:type_name -> core.v1.Metadata
+	37, // 9: core.v1.CaveatDefinition.source_position:type_name -> core.v1.SourcePosition
+	12, // 10: core.v1.CaveatTypeReference.child_types:type_name -> core.v1.CaveatTypeReference
+	1,  // 11: core.v1.RelationTupleUpdate.operation:type_name -> core.v1.RelationTupleUpdate.Operation
+	8,  // 12: core.v1.RelationTupleUpdate.tuple:type_name -> core.v1.RelationTuple
+	18, // 13: core.v1.RelationTupleTreeNode.intermediate_node:type_name -> core.v1.SetOperationUserset
+	20, // 14: core.v1.RelationTupleTreeNode.leaf_node:type_name -> core.v1.DirectSubjects
+	13, // 15: core.v1.RelationTupleTreeNode.expanded:type_name -> core.v1.ObjectAndRelation
+	38, // 16: core.v1.RelationTupleTreeNode.caveat_expression:type_name -> core.v1.CaveatExpression
+	2,  // 17: core.v1.SetOperationUserset.operation:type_name -> core.v1.SetOperationUserset.Operation
+	17, // 18: core.v1.SetOperationUserset.child_nodes:type_name -> core.v1.RelationTupleTreeNode
+	13, // 19: core.v1.DirectSubject.subject:type_name -> core.v1.ObjectAndRelation
+	38, // 20: core.v1.DirectSubject.caveat_expression:type_name -> core.v1.CaveatExpression
+	19, // 21: core.v1.DirectSubjects.subjects:type_name -> core.v1.DirectSubject
+	54, // 22: core.v1.Metadata.metadata_message:type_name -> google.protobuf.Any
+	24, // 23: core.v1.NamespaceDefinition.relation:type_name -> core.v1.Relation
+	21, // 24: core.v1.NamespaceDefinition.metadata:type_name -> core.v1.Metadata
+	37, // 25: core.v1.NamespaceDefinition.source_position:type_name -> core.v1.SourcePosition
+	23, // 26: core.v1.NamespaceDefinition.deprecation:type_name -> core.v1.Deprecation
+	0,  // 27: core.v1.Deprecation.deprecation_type:type_name -> core.v1.DeprecationType
+	37, // 28: core.v1.Deprecation.source_position:type_name -> core.v1.SourcePosition
+	32, // 29: core.v1.Relation.userset_rewrite:type_name -> core.v1.UsersetRewrite
+	28, // 30: core.v1.Relation.type_information:type_name -> core.v1.TypeInformation
+	21, // 31: core.v1.Relation.metadata:type_name -> core.v1.Metadata
+	37, // 32: core.v1.Relation.source_position:type_name -> core.v1.SourcePosition
+	23, // 33: core.v1.Relation.deprecation:type_name -> core.v1.Deprecation
+	43, // 34: core.v1.ReachabilityGraph.entrypoints_by_subject_type:type_name -> core.v1.ReachabilityGraph.EntrypointsBySubjectTypeEntry
+	44, // 35: core.v1.ReachabilityGraph.entrypoints_by_subject_relation:type_name -> core.v1.ReachabilityGraph.EntrypointsBySubjectRelationEntry
+	27, // 36: core.v1.ReachabilityEntrypoints.entrypoints:type_name -> core.v1.ReachabilityEntrypoint
+	14, // 37: core.v1.ReachabilityEntrypoints.subject_relation:type_name -> core.v1.RelationReference
+	3,  // 38: core.v1.ReachabilityEntrypoint.kind:type_name -> core.v1.ReachabilityEntrypoint.ReachabilityEntrypointKind
+	14, // 39: core.v1.ReachabilityEntrypoint.target_relation:type_name -> core.v1.RelationReference
+	4,  // 40: core.v1.ReachabilityEntrypoint.result_status:type_name -> core.v1.ReachabilityEntrypoint.EntrypointResultStatus
+	29, // 41: core.v1.TypeInformation.allowed_direct_relations:type_name -> core.v1.AllowedRelation
+	45, // 42: core.v1.AllowedRelation.public_wildcard:type_name -> core.v1.AllowedRelation.PublicWildcard
+	37, // 43: core.v1.AllowedRelation.source_position:type_name -> core.v1.SourcePosition
+	31, // 44: core.v1.AllowedRelation.required_caveat:type_name -> core.v1.AllowedCaveat
+	30, // 45: core.v1.AllowedRelation.required_expiration:type_name -> core.v1.ExpirationTrait
+	23, // 46: core.v1.AllowedRelation.deprecation:type_name -> core.v1.Deprecation
+	33, // 47: core.v1.UsersetRewrite.union:type_name -> core.v1.SetOperation
+	33, // 48: core.v1.UsersetRewrite.intersection:type_name -> core.v1.SetOperation
+	33, // 49: core.v1.UsersetRewrite.exclusion:type_name -> core.v1.SetOperation
+	37, // 50: core.v1.UsersetRewrite.source_position:type_name -> core.v1.SourcePosition
+	46, // 51: core.v1.SetOperation.child:type_name -> core.v1.SetOperation.Child
+	49, // 52: core.v1.TupleToUserset.tupleset:type_name -> core.v1.TupleToUserset.Tupleset
+	36, // 53: core.v1.TupleToUserset.computed_userset:type_name -> core.v1.ComputedUserset
+	37, // 54: core.v1.TupleToUserset.source_position:type_name -> core.v1.SourcePosition
+	5,  // 55: core.v1.FunctionedTupleToUserset.function:type_name -> core.v1.FunctionedTupleToUserset.Function
+	50, // 56: core.v1.FunctionedTupleToUserset.tupleset:type_name -> core.v1.FunctionedTupleToUserset.Tupleset
+	36, // 57: core.v1.FunctionedTupleToUserset.computed_userset:type_name -> core.v1.ComputedUserset
+	37, // 58: core.v1.FunctionedTupleToUserset.source_position:type_name -> core.v1.SourcePosition
+	6,  // 59: core.v1.ComputedUserset.object:type_name -> core.v1.ComputedUserset.Object
+	37, // 60: core.v1.ComputedUserset.source_position:type_name -> core.v1.SourcePosition
+	39, // 61: core.v1.CaveatExpression.operation:type_name -> core.v1.CaveatOperation
+	10, // 62: core.v1.CaveatExpression.caveat:type_name -> core.v1.ContextualizedCaveat
+	7,  // 63: core.v1.CaveatOperation.op:type_name -> core.v1.CaveatOperation.Operation
+	38, // 64: core.v1.CaveatOperation.children:type_name -> core.v1.CaveatExpression
+	41, // 65: core.v1.RelationshipFilter.optional_subject_filter:type_name -> core.v1.SubjectFilter
+	51, // 66: core.v1.SubjectFilter.optional_relation:type_name -> core.v1.SubjectFilter.RelationFilter
+	12, // 67: core.v1.CaveatDefinition.ParameterTypesEntry.value:type_name -> core.v1.CaveatTypeReference
+	26, // 68: core.v1.ReachabilityGraph.EntrypointsBySubjectTypeEntry.value:type_name -> core.v1.ReachabilityEntrypoints
+	26, // 69: core.v1.ReachabilityGraph.EntrypointsBySubjectRelationEntry.value:type_name -> core.v1.ReachabilityEntrypoints
+	47, // 70: core.v1.SetOperation.Child._this:type_name -> core.v1.SetOperation.Child.This
+	36, // 71: core.v1.SetOperation.Child.computed_userset:type_name -> core.v1.ComputedUserset
+	34, // 72: core.v1.SetOperation.Child.tuple_to_userset:type_name -> core.v1.TupleToUserset
+	32, // 73: core.v1.SetOperation.Child.userset_rewrite:type_name -> core.v1.UsersetRewrite
+	35, // 74: core.v1.SetOperation.Child.functioned_tuple_to_userset:type_name -> core.v1.FunctionedTupleToUserset
+	48, // 75: core.v1.SetOperation.Child._nil:type_name -> core.v1.SetOperation.Child.Nil
+	37, // 76: core.v1.SetOperation.Child.source_position:type_name -> core.v1.SourcePosition
+	77, // [77:77] is the sub-list for method output_type
+	77, // [77:77] is the sub-list for method input_type
+	77, // [77:77] is the sub-list for extension type_name
+	77, // [77:77] is the sub-list for extension extendee
+	0,  // [0:77] is the sub-list for field type_name
 }
 
 func init() { file_core_v1_core_proto_init() }
@@ -4009,7 +4213,7 @@ func file_core_v1_core_proto_init() {
 			}
 		}
 		file_core_v1_core_proto_msgTypes[15].Exporter = func(v any, i int) any {
-			switch v := v.(*Relation); i {
+			switch v := v.(*Deprecation); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4021,7 +4225,7 @@ func file_core_v1_core_proto_init() {
 			}
 		}
 		file_core_v1_core_proto_msgTypes[16].Exporter = func(v any, i int) any {
-			switch v := v.(*ReachabilityGraph); i {
+			switch v := v.(*Relation); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4033,7 +4237,7 @@ func file_core_v1_core_proto_init() {
 			}
 		}
 		file_core_v1_core_proto_msgTypes[17].Exporter = func(v any, i int) any {
-			switch v := v.(*ReachabilityEntrypoints); i {
+			switch v := v.(*ReachabilityGraph); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4045,7 +4249,7 @@ func file_core_v1_core_proto_init() {
 			}
 		}
 		file_core_v1_core_proto_msgTypes[18].Exporter = func(v any, i int) any {
-			switch v := v.(*ReachabilityEntrypoint); i {
+			switch v := v.(*ReachabilityEntrypoints); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4057,7 +4261,7 @@ func file_core_v1_core_proto_init() {
 			}
 		}
 		file_core_v1_core_proto_msgTypes[19].Exporter = func(v any, i int) any {
-			switch v := v.(*TypeInformation); i {
+			switch v := v.(*ReachabilityEntrypoint); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4069,7 +4273,7 @@ func file_core_v1_core_proto_init() {
 			}
 		}
 		file_core_v1_core_proto_msgTypes[20].Exporter = func(v any, i int) any {
-			switch v := v.(*AllowedRelation); i {
+			switch v := v.(*TypeInformation); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4081,7 +4285,7 @@ func file_core_v1_core_proto_init() {
 			}
 		}
 		file_core_v1_core_proto_msgTypes[21].Exporter = func(v any, i int) any {
-			switch v := v.(*ExpirationTrait); i {
+			switch v := v.(*AllowedRelation); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4093,7 +4297,7 @@ func file_core_v1_core_proto_init() {
 			}
 		}
 		file_core_v1_core_proto_msgTypes[22].Exporter = func(v any, i int) any {
-			switch v := v.(*AllowedCaveat); i {
+			switch v := v.(*ExpirationTrait); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4105,7 +4309,7 @@ func file_core_v1_core_proto_init() {
 			}
 		}
 		file_core_v1_core_proto_msgTypes[23].Exporter = func(v any, i int) any {
-			switch v := v.(*UsersetRewrite); i {
+			switch v := v.(*AllowedCaveat); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4117,7 +4321,7 @@ func file_core_v1_core_proto_init() {
 			}
 		}
 		file_core_v1_core_proto_msgTypes[24].Exporter = func(v any, i int) any {
-			switch v := v.(*SetOperation); i {
+			switch v := v.(*UsersetRewrite); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4129,7 +4333,7 @@ func file_core_v1_core_proto_init() {
 			}
 		}
 		file_core_v1_core_proto_msgTypes[25].Exporter = func(v any, i int) any {
-			switch v := v.(*TupleToUserset); i {
+			switch v := v.(*SetOperation); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4141,7 +4345,7 @@ func file_core_v1_core_proto_init() {
 			}
 		}
 		file_core_v1_core_proto_msgTypes[26].Exporter = func(v any, i int) any {
-			switch v := v.(*FunctionedTupleToUserset); i {
+			switch v := v.(*TupleToUserset); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4153,7 +4357,7 @@ func file_core_v1_core_proto_init() {
 			}
 		}
 		file_core_v1_core_proto_msgTypes[27].Exporter = func(v any, i int) any {
-			switch v := v.(*ComputedUserset); i {
+			switch v := v.(*FunctionedTupleToUserset); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4165,7 +4369,7 @@ func file_core_v1_core_proto_init() {
 			}
 		}
 		file_core_v1_core_proto_msgTypes[28].Exporter = func(v any, i int) any {
-			switch v := v.(*SourcePosition); i {
+			switch v := v.(*ComputedUserset); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4177,7 +4381,7 @@ func file_core_v1_core_proto_init() {
 			}
 		}
 		file_core_v1_core_proto_msgTypes[29].Exporter = func(v any, i int) any {
-			switch v := v.(*CaveatExpression); i {
+			switch v := v.(*SourcePosition); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4189,7 +4393,7 @@ func file_core_v1_core_proto_init() {
 			}
 		}
 		file_core_v1_core_proto_msgTypes[30].Exporter = func(v any, i int) any {
-			switch v := v.(*CaveatOperation); i {
+			switch v := v.(*CaveatExpression); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4201,7 +4405,7 @@ func file_core_v1_core_proto_init() {
 			}
 		}
 		file_core_v1_core_proto_msgTypes[31].Exporter = func(v any, i int) any {
-			switch v := v.(*RelationshipFilter); i {
+			switch v := v.(*CaveatOperation); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4213,6 +4417,18 @@ func file_core_v1_core_proto_init() {
 			}
 		}
 		file_core_v1_core_proto_msgTypes[32].Exporter = func(v any, i int) any {
+			switch v := v.(*RelationshipFilter); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_core_v1_core_proto_msgTypes[33].Exporter = func(v any, i int) any {
 			switch v := v.(*SubjectFilter); i {
 			case 0:
 				return &v.state
@@ -4224,7 +4440,7 @@ func file_core_v1_core_proto_init() {
 				return nil
 			}
 		}
-		file_core_v1_core_proto_msgTypes[36].Exporter = func(v any, i int) any {
+		file_core_v1_core_proto_msgTypes[37].Exporter = func(v any, i int) any {
 			switch v := v.(*AllowedRelation_PublicWildcard); i {
 			case 0:
 				return &v.state
@@ -4236,7 +4452,7 @@ func file_core_v1_core_proto_init() {
 				return nil
 			}
 		}
-		file_core_v1_core_proto_msgTypes[37].Exporter = func(v any, i int) any {
+		file_core_v1_core_proto_msgTypes[38].Exporter = func(v any, i int) any {
 			switch v := v.(*SetOperation_Child); i {
 			case 0:
 				return &v.state
@@ -4248,7 +4464,7 @@ func file_core_v1_core_proto_init() {
 				return nil
 			}
 		}
-		file_core_v1_core_proto_msgTypes[38].Exporter = func(v any, i int) any {
+		file_core_v1_core_proto_msgTypes[39].Exporter = func(v any, i int) any {
 			switch v := v.(*SetOperation_Child_This); i {
 			case 0:
 				return &v.state
@@ -4260,7 +4476,7 @@ func file_core_v1_core_proto_init() {
 				return nil
 			}
 		}
-		file_core_v1_core_proto_msgTypes[39].Exporter = func(v any, i int) any {
+		file_core_v1_core_proto_msgTypes[40].Exporter = func(v any, i int) any {
 			switch v := v.(*SetOperation_Child_Nil); i {
 			case 0:
 				return &v.state
@@ -4272,7 +4488,7 @@ func file_core_v1_core_proto_init() {
 				return nil
 			}
 		}
-		file_core_v1_core_proto_msgTypes[40].Exporter = func(v any, i int) any {
+		file_core_v1_core_proto_msgTypes[41].Exporter = func(v any, i int) any {
 			switch v := v.(*TupleToUserset_Tupleset); i {
 			case 0:
 				return &v.state
@@ -4284,7 +4500,7 @@ func file_core_v1_core_proto_init() {
 				return nil
 			}
 		}
-		file_core_v1_core_proto_msgTypes[41].Exporter = func(v any, i int) any {
+		file_core_v1_core_proto_msgTypes[42].Exporter = func(v any, i int) any {
 			switch v := v.(*FunctionedTupleToUserset_Tupleset); i {
 			case 0:
 				return &v.state
@@ -4296,7 +4512,7 @@ func file_core_v1_core_proto_init() {
 				return nil
 			}
 		}
-		file_core_v1_core_proto_msgTypes[42].Exporter = func(v any, i int) any {
+		file_core_v1_core_proto_msgTypes[43].Exporter = func(v any, i int) any {
 			switch v := v.(*SubjectFilter_RelationFilter); i {
 			case 0:
 				return &v.state
@@ -4313,20 +4529,20 @@ func file_core_v1_core_proto_init() {
 		(*RelationTupleTreeNode_IntermediateNode)(nil),
 		(*RelationTupleTreeNode_LeafNode)(nil),
 	}
-	file_core_v1_core_proto_msgTypes[20].OneofWrappers = []any{
+	file_core_v1_core_proto_msgTypes[21].OneofWrappers = []any{
 		(*AllowedRelation_Relation)(nil),
 		(*AllowedRelation_PublicWildcard_)(nil),
 	}
-	file_core_v1_core_proto_msgTypes[23].OneofWrappers = []any{
+	file_core_v1_core_proto_msgTypes[24].OneofWrappers = []any{
 		(*UsersetRewrite_Union)(nil),
 		(*UsersetRewrite_Intersection)(nil),
 		(*UsersetRewrite_Exclusion)(nil),
 	}
-	file_core_v1_core_proto_msgTypes[29].OneofWrappers = []any{
+	file_core_v1_core_proto_msgTypes[30].OneofWrappers = []any{
 		(*CaveatExpression_Operation)(nil),
 		(*CaveatExpression_Caveat)(nil),
 	}
-	file_core_v1_core_proto_msgTypes[37].OneofWrappers = []any{
+	file_core_v1_core_proto_msgTypes[38].OneofWrappers = []any{
 		(*SetOperation_Child_XThis)(nil),
 		(*SetOperation_Child_ComputedUserset)(nil),
 		(*SetOperation_Child_TupleToUserset)(nil),
@@ -4339,8 +4555,8 @@ func file_core_v1_core_proto_init() {
 		File: protoimpl.DescBuilder{
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_core_v1_core_proto_rawDesc,
-			NumEnums:      7,
-			NumMessages:   43,
+			NumEnums:      8,
+			NumMessages:   44,
 			NumExtensions: 0,
 			NumServices:   0,
 		},
diff --git a/pkg/proto/core/v1/core.pb.validate.go b/pkg/proto/core/v1/core.pb.validate.go
index f8a01af22e..bcc93ef290 100644
--- a/pkg/proto/core/v1/core.pb.validate.go
+++ b/pkg/proto/core/v1/core.pb.validate.go
@@ -2536,6 +2536,35 @@ func (m *NamespaceDefinition) validate(all bool) error {
 		}
 	}
 
+	if all {
+		switch v := interface{}(m.GetDeprecation()).(type) {
+		case interface{ ValidateAll() error }:
+			if err := v.ValidateAll(); err != nil {
+				errors = append(errors, NamespaceDefinitionValidationError{
+					field:  "Deprecation",
+					reason: "embedded message failed validation",
+					cause:  err,
+				})
+			}
+		case interface{ Validate() error }:
+			if err := v.Validate(); err != nil {
+				errors = append(errors, NamespaceDefinitionValidationError{
+					field:  "Deprecation",
+					reason: "embedded message failed validation",
+					cause:  err,
+				})
+			}
+		}
+	} else if v, ok := interface{}(m.GetDeprecation()).(interface{ Validate() error }); ok {
+		if err := v.Validate(); err != nil {
+			return NamespaceDefinitionValidationError{
+				field:  "Deprecation",
+				reason: "embedded message failed validation",
+				cause:  err,
+			}
+		}
+	}
+
 	if len(errors) > 0 {
 		return NamespaceDefinitionMultiError(errors)
 	}
@@ -2618,6 +2647,160 @@ var _ interface {
 
 var _NamespaceDefinition_Name_Pattern = regexp.MustCompile("^([a-z][a-z0-9_]{1,62}[a-z0-9]/)*[a-z][a-z0-9_]{1,62}[a-z0-9]$")
 
+// Validate checks the field values on Deprecation with the rules defined in
+// the proto definition for this message. If any rules are violated, the first
+// error encountered is returned, or nil if there are no violations.
+func (m *Deprecation) Validate() error {
+	return m.validate(false)
+}
+
+// ValidateAll checks the field values on Deprecation with the rules defined in
+// the proto definition for this message. If any rules are violated, the
+// result is a list of violation errors wrapped in DeprecationMultiError, or
+// nil if none found.
+func (m *Deprecation) ValidateAll() error {
+	return m.validate(true)
+}
+
+func (m *Deprecation) validate(all bool) error {
+	if m == nil {
+		return nil
+	}
+
+	var errors []error
+
+	if _, ok := DeprecationType_name[int32(m.GetDeprecationType())]; !ok {
+		err := DeprecationValidationError{
+			field:  "DeprecationType",
+			reason: "value must be one of the defined enum values",
+		}
+		if !all {
+			return err
+		}
+		errors = append(errors, err)
+	}
+
+	// no validation rules for Object
+
+	// no validation rules for Relation
+
+	if len(m.GetComments()) > 256 {
+		err := DeprecationValidationError{
+			field:  "Comments",
+			reason: "value length must be at most 256 bytes",
+		}
+		if !all {
+			return err
+		}
+		errors = append(errors, err)
+	}
+
+	if all {
+		switch v := interface{}(m.GetSourcePosition()).(type) {
+		case interface{ ValidateAll() error }:
+			if err := v.ValidateAll(); err != nil {
+				errors = append(errors, DeprecationValidationError{
+					field:  "SourcePosition",
+					reason: "embedded message failed validation",
+					cause:  err,
+				})
+			}
+		case interface{ Validate() error }:
+			if err := v.Validate(); err != nil {
+				errors = append(errors, DeprecationValidationError{
+					field:  "SourcePosition",
+					reason: "embedded message failed validation",
+					cause:  err,
+				})
+			}
+		}
+	} else if v, ok := interface{}(m.GetSourcePosition()).(interface{ Validate() error }); ok {
+		if err := v.Validate(); err != nil {
+			return DeprecationValidationError{
+				field:  "SourcePosition",
+				reason: "embedded message failed validation",
+				cause:  err,
+			}
+		}
+	}
+
+	if len(errors) > 0 {
+		return DeprecationMultiError(errors)
+	}
+
+	return nil
+}
+
+// DeprecationMultiError is an error wrapping multiple validation errors
+// returned by Deprecation.ValidateAll() if the designated constraints aren't met.
+type DeprecationMultiError []error
+
+// Error returns a concatenation of all the error messages it wraps.
+func (m DeprecationMultiError) Error() string {
+	var msgs []string
+	for _, err := range m {
+		msgs = append(msgs, err.Error())
+	}
+	return strings.Join(msgs, "; ")
+}
+
+// AllErrors returns a list of validation violation errors.
+func (m DeprecationMultiError) AllErrors() []error { return m }
+
+// DeprecationValidationError is the validation error returned by
+// Deprecation.Validate if the designated constraints aren't met.
+type DeprecationValidationError struct {
+	field  string
+	reason string
+	cause  error
+	key    bool
+}
+
+// Field function returns field value.
+func (e DeprecationValidationError) Field() string { return e.field }
+
+// Reason function returns reason value.
+func (e DeprecationValidationError) Reason() string { return e.reason }
+
+// Cause function returns cause value.
+func (e DeprecationValidationError) Cause() error { return e.cause }
+
+// Key function returns key value.
+func (e DeprecationValidationError) Key() bool { return e.key }
+
+// ErrorName returns error name.
+func (e DeprecationValidationError) ErrorName() string { return "DeprecationValidationError" }
+
+// Error satisfies the builtin error interface
+func (e DeprecationValidationError) Error() string {
+	cause := ""
+	if e.cause != nil {
+		cause = fmt.Sprintf(" | caused by: %v", e.cause)
+	}
+
+	key := ""
+	if e.key {
+		key = "key for "
+	}
+
+	return fmt.Sprintf(
+		"invalid %sDeprecation.%s: %s%s",
+		key,
+		e.field,
+		e.reason,
+		cause)
+}
+
+var _ error = DeprecationValidationError{}
+
+var _ interface {
+	Field() string
+	Reason() string
+	Key() bool
+	Cause() error
+	ErrorName() string
+} = DeprecationValidationError{}
+
 // Validate checks the field values on Relation with the rules defined in the
 // proto definition for this message. If any rules are violated, the first
 // error encountered is returned, or nil if there are no violations.
@@ -2782,6 +2965,35 @@ func (m *Relation) validate(all bool) error {
 
 	// no validation rules for CanonicalCacheKey
 
+	if all {
+		switch v := interface{}(m.GetDeprecation()).(type) {
+		case interface{ ValidateAll() error }:
+			if err := v.ValidateAll(); err != nil {
+				errors = append(errors, RelationValidationError{
+					field:  "Deprecation",
+					reason: "embedded message failed validation",
+					cause:  err,
+				})
+			}
+		case interface{ Validate() error }:
+			if err := v.Validate(); err != nil {
+				errors = append(errors, RelationValidationError{
+					field:  "Deprecation",
+					reason: "embedded message failed validation",
+					cause:  err,
+				})
+			}
+		}
+	} else if v, ok := interface{}(m.GetDeprecation()).(interface{ Validate() error }); ok {
+		if err := v.Validate(); err != nil {
+			return RelationValidationError{
+				field:  "Deprecation",
+				reason: "embedded message failed validation",
+				cause:  err,
+			}
+		}
+	}
+
 	if len(errors) > 0 {
 		return RelationMultiError(errors)
 	}
@@ -3626,6 +3838,35 @@ func (m *AllowedRelation) validate(all bool) error {
 		}
 	}
 
+	if all {
+		switch v := interface{}(m.GetDeprecation()).(type) {
+		case interface{ ValidateAll() error }:
+			if err := v.ValidateAll(); err != nil {
+				errors = append(errors, AllowedRelationValidationError{
+					field:  "Deprecation",
+					reason: "embedded message failed validation",
+					cause:  err,
+				})
+			}
+		case interface{ Validate() error }:
+			if err := v.Validate(); err != nil {
+				errors = append(errors, AllowedRelationValidationError{
+					field:  "Deprecation",
+					reason: "embedded message failed validation",
+					cause:  err,
+				})
+			}
+		}
+	} else if v, ok := interface{}(m.GetDeprecation()).(interface{ Validate() error }); ok {
+		if err := v.Validate(); err != nil {
+			return AllowedRelationValidationError{
+				field:  "Deprecation",
+				reason: "embedded message failed validation",
+				cause:  err,
+			}
+		}
+	}
+
 	switch v := m.RelationOrWildcard.(type) {
 	case *AllowedRelation_Relation:
 		if v == nil {
diff --git a/pkg/proto/core/v1/core_vtproto.pb.go b/pkg/proto/core/v1/core_vtproto.pb.go
index 160a1d9339..dbf9980ef1 100644
--- a/pkg/proto/core/v1/core_vtproto.pb.go
+++ b/pkg/proto/core/v1/core_vtproto.pb.go
@@ -351,6 +351,7 @@ func (m *NamespaceDefinition) CloneVT() *NamespaceDefinition {
 	r.Name = m.Name
 	r.Metadata = m.Metadata.CloneVT()
 	r.SourcePosition = m.SourcePosition.CloneVT()
+	r.Deprecation = m.Deprecation.CloneVT()
 	if rhs := m.Relation; rhs != nil {
 		tmpContainer := make([]*Relation, len(rhs))
 		for k, v := range rhs {
@@ -369,6 +370,27 @@ func (m *NamespaceDefinition) CloneMessageVT() proto.Message {
 	return m.CloneVT()
 }
 
+func (m *Deprecation) CloneVT() *Deprecation {
+	if m == nil {
+		return (*Deprecation)(nil)
+	}
+	r := new(Deprecation)
+	r.DeprecationType = m.DeprecationType
+	r.Object = m.Object
+	r.Relation = m.Relation
+	r.Comments = m.Comments
+	r.SourcePosition = m.SourcePosition.CloneVT()
+	if len(m.unknownFields) > 0 {
+		r.unknownFields = make([]byte, len(m.unknownFields))
+		copy(r.unknownFields, m.unknownFields)
+	}
+	return r
+}
+
+func (m *Deprecation) CloneMessageVT() proto.Message {
+	return m.CloneVT()
+}
+
 func (m *Relation) CloneVT() *Relation {
 	if m == nil {
 		return (*Relation)(nil)
@@ -381,6 +403,7 @@ func (m *Relation) CloneVT() *Relation {
 	r.SourcePosition = m.SourcePosition.CloneVT()
 	r.AliasingRelation = m.AliasingRelation
 	r.CanonicalCacheKey = m.CanonicalCacheKey
+	r.Deprecation = m.Deprecation.CloneVT()
 	if len(m.unknownFields) > 0 {
 		r.unknownFields = make([]byte, len(m.unknownFields))
 		copy(r.unknownFields, m.unknownFields)
@@ -516,6 +539,7 @@ func (m *AllowedRelation) CloneVT() *AllowedRelation {
 	r.SourcePosition = m.SourcePosition.CloneVT()
 	r.RequiredCaveat = m.RequiredCaveat.CloneVT()
 	r.RequiredExpiration = m.RequiredExpiration.CloneVT()
+	r.Deprecation = m.Deprecation.CloneVT()
 	if m.RelationOrWildcard != nil {
 		r.RelationOrWildcard = m.RelationOrWildcard.(interface {
 			CloneVT() isAllowedRelation_RelationOrWildcard
@@ -1488,6 +1512,9 @@ func (this *NamespaceDefinition) EqualVT(that *NamespaceDefinition) bool {
 	if !this.SourcePosition.EqualVT(that.SourcePosition) {
 		return false
 	}
+	if !this.Deprecation.EqualVT(that.Deprecation) {
+		return false
+	}
 	return string(this.unknownFields) == string(that.unknownFields)
 }
 
@@ -1498,6 +1525,37 @@ func (this *NamespaceDefinition) EqualMessageVT(thatMsg proto.Message) bool {
 	}
 	return this.EqualVT(that)
 }
+func (this *Deprecation) EqualVT(that *Deprecation) bool {
+	if this == that {
+		return true
+	} else if this == nil || that == nil {
+		return false
+	}
+	if this.DeprecationType != that.DeprecationType {
+		return false
+	}
+	if this.Object != that.Object {
+		return false
+	}
+	if this.Relation != that.Relation {
+		return false
+	}
+	if this.Comments != that.Comments {
+		return false
+	}
+	if !this.SourcePosition.EqualVT(that.SourcePosition) {
+		return false
+	}
+	return string(this.unknownFields) == string(that.unknownFields)
+}
+
+func (this *Deprecation) EqualMessageVT(thatMsg proto.Message) bool {
+	that, ok := thatMsg.(*Deprecation)
+	if !ok {
+		return false
+	}
+	return this.EqualVT(that)
+}
 func (this *Relation) EqualVT(that *Relation) bool {
 	if this == that {
 		return true
@@ -1525,6 +1583,9 @@ func (this *Relation) EqualVT(that *Relation) bool {
 	if this.CanonicalCacheKey != that.CanonicalCacheKey {
 		return false
 	}
+	if !this.Deprecation.EqualVT(that.Deprecation) {
+		return false
+	}
 	return string(this.unknownFields) == string(that.unknownFields)
 }
 
@@ -1740,6 +1801,9 @@ func (this *AllowedRelation) EqualVT(that *AllowedRelation) bool {
 	if !this.RequiredExpiration.EqualVT(that.RequiredExpiration) {
 		return false
 	}
+	if !this.Deprecation.EqualVT(that.Deprecation) {
+		return false
+	}
 	return string(this.unknownFields) == string(that.unknownFields)
 }
 
@@ -3366,6 +3430,16 @@ func (m *NamespaceDefinition) MarshalToSizedBufferVT(dAtA []byte) (int, error) {
 		i -= len(m.unknownFields)
 		copy(dAtA[i:], m.unknownFields)
 	}
+	if m.Deprecation != nil {
+		size, err := m.Deprecation.MarshalToSizedBufferVT(dAtA[:i])
+		if err != nil {
+			return 0, err
+		}
+		i -= size
+		i = protohelpers.EncodeVarint(dAtA, i, uint64(size))
+		i--
+		dAtA[i] = 0x2a
+	}
 	if m.SourcePosition != nil {
 		size, err := m.SourcePosition.MarshalToSizedBufferVT(dAtA[:i])
 		if err != nil {
@@ -3408,6 +3482,75 @@ func (m *NamespaceDefinition) MarshalToSizedBufferVT(dAtA []byte) (int, error) {
 	return len(dAtA) - i, nil
 }
 
+func (m *Deprecation) MarshalVT() (dAtA []byte, err error) {
+	if m == nil {
+		return nil, nil
+	}
+	size := m.SizeVT()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalToSizedBufferVT(dAtA[:size])
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *Deprecation) MarshalToVT(dAtA []byte) (int, error) {
+	size := m.SizeVT()
+	return m.MarshalToSizedBufferVT(dAtA[:size])
+}
+
+func (m *Deprecation) MarshalToSizedBufferVT(dAtA []byte) (int, error) {
+	if m == nil {
+		return 0, nil
+	}
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	if m.unknownFields != nil {
+		i -= len(m.unknownFields)
+		copy(dAtA[i:], m.unknownFields)
+	}
+	if m.SourcePosition != nil {
+		size, err := m.SourcePosition.MarshalToSizedBufferVT(dAtA[:i])
+		if err != nil {
+			return 0, err
+		}
+		i -= size
+		i = protohelpers.EncodeVarint(dAtA, i, uint64(size))
+		i--
+		dAtA[i] = 0x2a
+	}
+	if len(m.Comments) > 0 {
+		i -= len(m.Comments)
+		copy(dAtA[i:], m.Comments)
+		i = protohelpers.EncodeVarint(dAtA, i, uint64(len(m.Comments)))
+		i--
+		dAtA[i] = 0x22
+	}
+	if len(m.Relation) > 0 {
+		i -= len(m.Relation)
+		copy(dAtA[i:], m.Relation)
+		i = protohelpers.EncodeVarint(dAtA, i, uint64(len(m.Relation)))
+		i--
+		dAtA[i] = 0x1a
+	}
+	if len(m.Object) > 0 {
+		i -= len(m.Object)
+		copy(dAtA[i:], m.Object)
+		i = protohelpers.EncodeVarint(dAtA, i, uint64(len(m.Object)))
+		i--
+		dAtA[i] = 0x12
+	}
+	if m.DeprecationType != 0 {
+		i = protohelpers.EncodeVarint(dAtA, i, uint64(m.DeprecationType))
+		i--
+		dAtA[i] = 0x8
+	}
+	return len(dAtA) - i, nil
+}
+
 func (m *Relation) MarshalVT() (dAtA []byte, err error) {
 	if m == nil {
 		return nil, nil
@@ -3438,6 +3581,16 @@ func (m *Relation) MarshalToSizedBufferVT(dAtA []byte) (int, error) {
 		i -= len(m.unknownFields)
 		copy(dAtA[i:], m.unknownFields)
 	}
+	if m.Deprecation != nil {
+		size, err := m.Deprecation.MarshalToSizedBufferVT(dAtA[:i])
+		if err != nil {
+			return 0, err
+		}
+		i -= size
+		i = protohelpers.EncodeVarint(dAtA, i, uint64(size))
+		i--
+		dAtA[i] = 0x42
+	}
 	if len(m.CanonicalCacheKey) > 0 {
 		i -= len(m.CanonicalCacheKey)
 		copy(dAtA[i:], m.CanonicalCacheKey)
@@ -3825,6 +3978,16 @@ func (m *AllowedRelation) MarshalToSizedBufferVT(dAtA []byte) (int, error) {
 		}
 		i -= size
 	}
+	if m.Deprecation != nil {
+		size, err := m.Deprecation.MarshalToSizedBufferVT(dAtA[:i])
+		if err != nil {
+			return 0, err
+		}
+		i -= size
+		i = protohelpers.EncodeVarint(dAtA, i, uint64(size))
+		i--
+		dAtA[i] = 0x42
+	}
 	if m.RequiredExpiration != nil {
 		size, err := m.RequiredExpiration.MarshalToSizedBufferVT(dAtA[:i])
 		if err != nil {
@@ -5374,6 +5537,39 @@ func (m *NamespaceDefinition) SizeVT() (n int) {
 		l = m.SourcePosition.SizeVT()
 		n += 1 + l + protohelpers.SizeOfVarint(uint64(l))
 	}
+	if m.Deprecation != nil {
+		l = m.Deprecation.SizeVT()
+		n += 1 + l + protohelpers.SizeOfVarint(uint64(l))
+	}
+	n += len(m.unknownFields)
+	return n
+}
+
+func (m *Deprecation) SizeVT() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	if m.DeprecationType != 0 {
+		n += 1 + protohelpers.SizeOfVarint(uint64(m.DeprecationType))
+	}
+	l = len(m.Object)
+	if l > 0 {
+		n += 1 + l + protohelpers.SizeOfVarint(uint64(l))
+	}
+	l = len(m.Relation)
+	if l > 0 {
+		n += 1 + l + protohelpers.SizeOfVarint(uint64(l))
+	}
+	l = len(m.Comments)
+	if l > 0 {
+		n += 1 + l + protohelpers.SizeOfVarint(uint64(l))
+	}
+	if m.SourcePosition != nil {
+		l = m.SourcePosition.SizeVT()
+		n += 1 + l + protohelpers.SizeOfVarint(uint64(l))
+	}
 	n += len(m.unknownFields)
 	return n
 }
@@ -5412,6 +5608,10 @@ func (m *Relation) SizeVT() (n int) {
 	if l > 0 {
 		n += 1 + l + protohelpers.SizeOfVarint(uint64(l))
 	}
+	if m.Deprecation != nil {
+		l = m.Deprecation.SizeVT()
+		n += 1 + l + protohelpers.SizeOfVarint(uint64(l))
+	}
 	n += len(m.unknownFields)
 	return n
 }
@@ -5555,6 +5755,10 @@ func (m *AllowedRelation) SizeVT() (n int) {
 		l = m.RequiredExpiration.SizeVT()
 		n += 1 + l + protohelpers.SizeOfVarint(uint64(l))
 	}
+	if m.Deprecation != nil {
+		l = m.Deprecation.SizeVT()
+		n += 1 + l + protohelpers.SizeOfVarint(uint64(l))
+	}
 	n += len(m.unknownFields)
 	return n
 }
@@ -8206,6 +8410,244 @@ func (m *NamespaceDefinition) UnmarshalVT(dAtA []byte) error {
 				return err
 			}
 			iNdEx = postIndex
+		case 5:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Deprecation", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return protohelpers.ErrIntOverflow
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				msglen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if msglen < 0 {
+				return protohelpers.ErrInvalidLength
+			}
+			postIndex := iNdEx + msglen
+			if postIndex < 0 {
+				return protohelpers.ErrInvalidLength
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			if m.Deprecation == nil {
+				m.Deprecation = &Deprecation{}
+			}
+			if err := m.Deprecation.UnmarshalVT(dAtA[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			iNdEx = postIndex
+		default:
+			iNdEx = preIndex
+			skippy, err := protohelpers.Skip(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
+				return protohelpers.ErrInvalidLength
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.unknownFields = append(m.unknownFields, dAtA[iNdEx:iNdEx+skippy]...)
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
+func (m *Deprecation) UnmarshalVT(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return protohelpers.ErrIntOverflow
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= uint64(b&0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: Deprecation: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: Deprecation: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field DeprecationType", wireType)
+			}
+			m.DeprecationType = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return protohelpers.ErrIntOverflow
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.DeprecationType |= DeprecationType(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		case 2:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Object", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return protohelpers.ErrIntOverflow
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return protohelpers.ErrInvalidLength
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex < 0 {
+				return protohelpers.ErrInvalidLength
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Object = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
+		case 3:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Relation", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return protohelpers.ErrIntOverflow
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return protohelpers.ErrInvalidLength
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex < 0 {
+				return protohelpers.ErrInvalidLength
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Relation = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
+		case 4:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Comments", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return protohelpers.ErrIntOverflow
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return protohelpers.ErrInvalidLength
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex < 0 {
+				return protohelpers.ErrInvalidLength
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Comments = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
+		case 5:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field SourcePosition", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return protohelpers.ErrIntOverflow
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				msglen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if msglen < 0 {
+				return protohelpers.ErrInvalidLength
+			}
+			postIndex := iNdEx + msglen
+			if postIndex < 0 {
+				return protohelpers.ErrInvalidLength
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			if m.SourcePosition == nil {
+				m.SourcePosition = &SourcePosition{}
+			}
+			if err := m.SourcePosition.UnmarshalVT(dAtA[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			iNdEx = postIndex
 		default:
 			iNdEx = preIndex
 			skippy, err := protohelpers.Skip(dAtA[iNdEx:])
@@ -8497,6 +8939,42 @@ func (m *Relation) UnmarshalVT(dAtA []byte) error {
 			}
 			m.CanonicalCacheKey = string(dAtA[iNdEx:postIndex])
 			iNdEx = postIndex
+		case 8:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Deprecation", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return protohelpers.ErrIntOverflow
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				msglen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if msglen < 0 {
+				return protohelpers.ErrInvalidLength
+			}
+			postIndex := iNdEx + msglen
+			if postIndex < 0 {
+				return protohelpers.ErrInvalidLength
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			if m.Deprecation == nil {
+				m.Deprecation = &Deprecation{}
+			}
+			if err := m.Deprecation.UnmarshalVT(dAtA[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			iNdEx = postIndex
 		default:
 			iNdEx = preIndex
 			skippy, err := protohelpers.Skip(dAtA[iNdEx:])
@@ -9548,6 +10026,42 @@ func (m *AllowedRelation) UnmarshalVT(dAtA []byte) error {
 				return err
 			}
 			iNdEx = postIndex
+		case 8:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Deprecation", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return protohelpers.ErrIntOverflow
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				msglen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if msglen < 0 {
+				return protohelpers.ErrInvalidLength
+			}
+			postIndex := iNdEx + msglen
+			if postIndex < 0 {
+				return protohelpers.ErrInvalidLength
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			if m.Deprecation == nil {
+				m.Deprecation = &Deprecation{}
+			}
+			if err := m.Deprecation.UnmarshalVT(dAtA[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			iNdEx = postIndex
 		default:
 			iNdEx = preIndex
 			skippy, err := protohelpers.Skip(dAtA[iNdEx:])
diff --git a/pkg/schemadsl/compiler/compiler.go b/pkg/schemadsl/compiler/compiler.go
index cf0a074e2c..24c59f8728 100644
--- a/pkg/schemadsl/compiler/compiler.go
+++ b/pkg/schemadsl/compiler/compiler.go
@@ -76,7 +76,10 @@ func CaveatTypeSet(cts *caveattypes.TypeSet) Option {
 	return func(cfg *config) { cfg.caveatTypeSet = cts }
 }
 
-const expirationFlag = "expiration"
+const (
+	expirationFlag  = "expiration"
+	deprecationFlag = "deprecation"
+)
 
 func DisallowExpirationFlag() Option {
 	return func(cfg *config) {
@@ -86,6 +89,14 @@ func DisallowExpirationFlag() Option {
 	}
 }
 
+func DisallowDeprecationFlag() Option {
+	return func(cfg *config) {
+		cfg.allowedFlags = slicez.Filter(cfg.allowedFlags, func(s string) bool {
+			return s != deprecationFlag
+		})
+	}
+}
+
 type Option func(*config)
 
 type ObjectPrefixOption func(*config)
@@ -98,6 +109,7 @@ func Compile(schema InputSchema, prefix ObjectPrefixOption, opts ...Option) (*Co
 
 	// Enable `expiration` flag by default.
 	cfg.allowedFlags = append(cfg.allowedFlags, expirationFlag)
+	cfg.allowedFlags = append(cfg.allowedFlags, deprecationFlag)
 
 	prefix(cfg) // required option
 
diff --git a/pkg/schemadsl/compiler/translator.go b/pkg/schemadsl/compiler/translator.go
index ce8f552ad8..008999eb21 100644
--- a/pkg/schemadsl/compiler/translator.go
+++ b/pkg/schemadsl/compiler/translator.go
@@ -18,13 +18,15 @@ import (
 )
 
 type translationContext struct {
-	objectTypePrefix *string
-	mapper           input.PositionMapper
-	schemaString     string
-	skipValidate     bool
-	allowedFlags     []string
-	enabledFlags     []string
-	caveatTypeSet    *caveattypes.TypeSet
+	objectTypePrefix   *string
+	mapper             input.PositionMapper
+	schemaString       string
+	skipValidate       bool
+	allowedFlags       []string
+	enabledFlags       []string
+	caveatTypeSet      *caveattypes.TypeSet
+	deprecatedRelation bool
+	deprecation        *core.Deprecation
 }
 
 func (tctx *translationContext) prefixedPath(definitionName string) (string, error) {
@@ -50,6 +52,7 @@ func translate(tctx *translationContext, root *dslNode) (*CompiledSchema, error)
 	orderedDefinitions := make([]SchemaDefinition, 0, len(root.GetChildren()))
 	var objectDefinitions []*core.NamespaceDefinition
 	var caveatDefinitions []*core.CaveatDefinition
+	var deprecationDefinition []*core.Deprecation
 
 	nodes := make(map[string]*dslNode)
 
@@ -81,15 +84,30 @@ func translate(tctx *translationContext, root *dslNode) (*CompiledSchema, error)
 
 			definition = def
 			objectDefinitions = append(objectDefinitions, def)
-		}
 
-		if _, ok := nodes[definition.GetName()]; ok {
-			return nil, definitionNode.WithSourceErrorf(definition.GetName(), "found name reused between multiple definitions and/or caveats: %s", definition.GetName())
+		case dslshape.NodeTypeDeprecation:
+			def, err := translateDeprecation(tctx, definitionNode)
+			if err != nil {
+				return nil, err
+			}
+			deprecationDefinition = append(deprecationDefinition, def)
 		}
 
-		nodes[definition.GetName()] = definitionNode
+		if definition != nil {
+			if _, ok := nodes[definition.GetName()]; ok {
+				return nil, definitionNode.WithSourceErrorf(definition.GetName(), "found name reused between multiple definitions and/or caveats: %s", definition.GetName())
+			}
+			nodes[definition.GetName()] = definitionNode
 
-		orderedDefinitions = append(orderedDefinitions, definition)
+			orderedDefinitions = append(orderedDefinitions, definition)
+		}
+	}
+
+	if slices.Contains(tctx.allowedFlags, "deprecation") && slices.Contains(tctx.enabledFlags, "deprecation") {
+		err := deprecateRelationsAndObjects(deprecationDefinition, objectDefinitions)
+		if err != nil {
+			return nil, err
+		}
 	}
 
 	// Strip the type annotation metadata if typechecking isn't enabled.
@@ -231,6 +249,21 @@ func translateObjectDefinition(tctx *translationContext, defNode *dslNode) (*cor
 			continue
 		}
 
+		if relationOrPermissionNode.GetType() == dslshape.NodeTypeDeprecation {
+			if !slices.Contains(tctx.allowedFlags, "deprecation") || !slices.Contains(tctx.enabledFlags, "deprecation") {
+				return nil, relationOrPermissionNode.Errorf("deprecation not enabled")
+			}
+			// in case of a deprecation found in the definition, we mark the relation as deprecated with the help of a context bool
+			// which would help mark the immediately following relation as deprecated
+			tctx.deprecatedRelation = true
+			tctx.deprecation, err = translateDeprecation(tctx, relationOrPermissionNode)
+			if err != nil {
+				return nil, relationOrPermissionNode.Errorf("invalid deprecation: %w", err)
+			}
+
+			continue
+		}
+
 		relationOrPermission, err := translateRelationOrPermission(tctx, relationOrPermissionNode)
 		if err != nil {
 			return nil, err
@@ -271,6 +304,42 @@ func translateObjectDefinition(tctx *translationContext, defNode *dslNode) (*cor
 	return ns, nil
 }
 
+func deprecateRelationsAndObjects(deprecations []*core.Deprecation, namespaces []*core.NamespaceDefinition) error {
+	objectMap := make(map[string]*core.NamespaceDefinition)
+	relationMap := make(map[string]*core.Relation)
+
+	for _, ns := range namespaces {
+		ns.Deprecation = &core.Deprecation{DeprecationType: core.DeprecationType_DEPRECATED_TYPE_UNSPECIFIED}
+		objectMap[ns.GetName()] = ns
+		for _, rel := range ns.GetRelation() {
+			// check if the relation already has a deprecation defined inside a definition
+			if rel.Deprecation == nil {
+				rel.Deprecation = &core.Deprecation{DeprecationType: core.DeprecationType_DEPRECATED_TYPE_UNSPECIFIED}
+			}
+			key := ns.GetName() + "#" + rel.GetName()
+			relationMap[key] = rel
+		}
+	}
+
+	// Apply deprecations
+	for _, dep := range deprecations {
+		if dep.Object != "" && dep.Relation != "" {
+			rel, ok := relationMap[dep.Object+"#"+dep.Relation]
+			if !ok {
+				return fmt.Errorf("warning: Deprecation for relation %s not found in relation map", dep.Object)
+			}
+			rel.Deprecation = dep
+		} else {
+			obj, ok := objectMap[dep.Object]
+			if !ok {
+				return fmt.Errorf("warning: Deprecation for object %s not found in object map", dep.Object)
+			}
+			obj.Deprecation = dep
+		}
+	}
+	return nil
+}
+
 func getSourcePosition(dslNode *dslNode, mapper input.PositionMapper) *core.SourcePosition {
 	if !dslNode.Has(dslshape.NodePredicateStartRune) {
 		return nil
@@ -318,6 +387,17 @@ func normalizeComment(value string) string {
 	return strings.Join(lines, "\n")
 }
 
+func deprecationTypeFromString(s string) core.DeprecationType {
+	switch strings.ToLower(s) {
+	case "warn":
+		return core.DeprecationType_DEPRECATED_TYPE_WARNING
+	case "error":
+		return core.DeprecationType_DEPRECATED_TYPE_ERROR
+	default:
+		return core.DeprecationType_DEPRECATED_TYPE_UNSPECIFIED
+	}
+}
+
 func translateRelationOrPermission(tctx *translationContext, relOrPermNode *dslNode) (*core.Relation, error) {
 	switch relOrPermNode.GetType() {
 	case dslshape.NodeTypeRelation:
@@ -327,6 +407,11 @@ func translateRelationOrPermission(tctx *translationContext, relOrPermNode *dslN
 		}
 		rel.Metadata = addComments(rel.Metadata, relOrPermNode)
 		rel.SourcePosition = getSourcePosition(relOrPermNode, tctx.mapper)
+
+		if tctx.deprecatedRelation {
+			rel.Deprecation = tctx.deprecation
+			tctx.deprecatedRelation = false
+		}
 		return rel, err
 
 	case dslshape.NodeTypePermission:
@@ -422,6 +507,38 @@ func translatePermission(tctx *translationContext, permissionNode *dslNode) (*co
 	return permission, nil
 }
 
+func translateDeprecation(tctx *translationContext, depNode *dslNode) (*core.Deprecation, error) {
+	if !slices.Contains(tctx.allowedFlags, "deprecation") || !slices.Contains(tctx.enabledFlags, "deprecation") {
+		return nil, depNode.Errorf("deprecation not enabled")
+	}
+
+	deprecationType, err := depNode.GetString(dslshape.NodeDeprecatedType)
+	if err != nil {
+		return nil, depNode.Errorf("invalid deprecation type: %w", err)
+	}
+
+	object, objErr := depNode.GetString(dslshape.NodeDeprecatedObject)
+	rel, relErr := depNode.GetString(dslshape.NodeTypeDeprecatedRelation)
+	comments, commentsErr := depNode.GetString(dslshape.NodeDeprecatedComments)
+
+	deprecation := &core.Deprecation{
+		DeprecationType: deprecationTypeFromString(deprecationType),
+	}
+
+	// Conditionally add optional fields
+	if objErr == nil {
+		deprecation.Object = object
+	}
+	if relErr == nil {
+		deprecation.Relation = rel
+	}
+	if commentsErr == nil {
+		deprecation.Comments = comments
+	}
+
+	return deprecation, nil
+}
+
 // extractTypeAnnotations is a helper function to return the literal identifiers under the type annotation node
 func extractTypeAnnotations(typeAnnotationNode *dslNode) ([]string, error) {
 	children := typeAnnotationNode.List(dslshape.NodeTypeAnnotationPredicateTypes)
diff --git a/pkg/schemadsl/dslshape/dslshape.go b/pkg/schemadsl/dslshape/dslshape.go
index e9b8bd4f70..f59075d653 100644
--- a/pkg/schemadsl/dslshape/dslshape.go
+++ b/pkg/schemadsl/dslshape/dslshape.go
@@ -22,6 +22,9 @@ const (
 	NodeTypePermission     // A permission
 	NodeTypeTypeAnnotation // A type annotation for permissions
 
+	NodeTypeDeprecation        // A deprecated relation.
+	NodeTypeDeprecationOptions // Options for a deprecation.
+
 	NodeTypeTypeReference         // A type reference
 	NodeTypeSpecificTypeReference // A reference to a specific type.
 	NodeTypeCaveatReference       // A caveat reference under a type.
@@ -217,4 +220,28 @@ const (
 	//
 	NodeExpressionPredicateLeftExpr  = "left-expr"
 	NodeExpressionPredicateRightExpr = "right-expr"
+
+	//
+	// NodeTypeDeprecatedOptions
+	//
+	// The type of deprecation
+	NodeDeprecatedType = "deprecation-type"
+
+	//
+	// NodeTypeDeprecatedObject
+	//
+	// The value of an object for a deprecation
+	NodeDeprecatedObject = "deprecation-object"
+
+	//
+	// NodeTypeDeprecatedRelation
+	//
+	// The value of a relation for depreaction
+	NodeTypeDeprecatedRelation = "deprecation-relation"
+
+	//
+	// NodeTypeDeprecatedOptions
+	//
+	// The value of an option for a deprecation
+	NodeDeprecatedComments = "deprecation-comments"
 )
diff --git a/pkg/schemadsl/dslshape/zz_generated.nodetype_string.go b/pkg/schemadsl/dslshape/zz_generated.nodetype_string.go
index 3cd3450fb5..d30b2c8460 100644
--- a/pkg/schemadsl/dslshape/zz_generated.nodetype_string.go
+++ b/pkg/schemadsl/dslshape/zz_generated.nodetype_string.go
@@ -19,22 +19,24 @@ func _() {
 	_ = x[NodeTypeRelation-8]
 	_ = x[NodeTypePermission-9]
 	_ = x[NodeTypeTypeAnnotation-10]
-	_ = x[NodeTypeTypeReference-11]
-	_ = x[NodeTypeSpecificTypeReference-12]
-	_ = x[NodeTypeCaveatReference-13]
-	_ = x[NodeTypeTraitReference-14]
-	_ = x[NodeTypeUnionExpression-15]
-	_ = x[NodeTypeIntersectExpression-16]
-	_ = x[NodeTypeExclusionExpression-17]
-	_ = x[NodeTypeArrowExpression-18]
-	_ = x[NodeTypeIdentifier-19]
-	_ = x[NodeTypeNilExpression-20]
-	_ = x[NodeTypeCaveatTypeReference-21]
+	_ = x[NodeTypeDeprecation-11]
+	_ = x[NodeTypeDeprecationOptions-12]
+	_ = x[NodeTypeTypeReference-13]
+	_ = x[NodeTypeSpecificTypeReference-14]
+	_ = x[NodeTypeCaveatReference-15]
+	_ = x[NodeTypeTraitReference-16]
+	_ = x[NodeTypeUnionExpression-17]
+	_ = x[NodeTypeIntersectExpression-18]
+	_ = x[NodeTypeExclusionExpression-19]
+	_ = x[NodeTypeArrowExpression-20]
+	_ = x[NodeTypeIdentifier-21]
+	_ = x[NodeTypeNilExpression-22]
+	_ = x[NodeTypeCaveatTypeReference-23]
 }
 
-const _NodeType_name = "NodeTypeErrorNodeTypeFileNodeTypeCommentNodeTypeUseFlagNodeTypeDefinitionNodeTypeCaveatDefinitionNodeTypeCaveatParameterNodeTypeCaveatExpressionNodeTypeRelationNodeTypePermissionNodeTypeTypeAnnotationNodeTypeTypeReferenceNodeTypeSpecificTypeReferenceNodeTypeCaveatReferenceNodeTypeTraitReferenceNodeTypeUnionExpressionNodeTypeIntersectExpressionNodeTypeExclusionExpressionNodeTypeArrowExpressionNodeTypeIdentifierNodeTypeNilExpressionNodeTypeCaveatTypeReference"
+const _NodeType_name = "NodeTypeErrorNodeTypeFileNodeTypeCommentNodeTypeUseFlagNodeTypeDefinitionNodeTypeCaveatDefinitionNodeTypeCaveatParameterNodeTypeCaveatExpressionNodeTypeRelationNodeTypePermissionNodeTypeTypeAnnotationNodeTypeDeprecationNodeTypeDeprecationOptionsNodeTypeTypeReferenceNodeTypeSpecificTypeReferenceNodeTypeCaveatReferenceNodeTypeTraitReferenceNodeTypeUnionExpressionNodeTypeIntersectExpressionNodeTypeExclusionExpressionNodeTypeArrowExpressionNodeTypeIdentifierNodeTypeNilExpressionNodeTypeCaveatTypeReference"
 
-var _NodeType_index = [...]uint16{0, 13, 25, 40, 55, 73, 97, 120, 144, 160, 178, 200, 221, 250, 273, 295, 318, 345, 372, 395, 413, 434, 461}
+var _NodeType_index = [...]uint16{0, 13, 25, 40, 55, 73, 97, 120, 144, 160, 178, 200, 219, 245, 266, 295, 318, 340, 363, 390, 417, 440, 458, 479, 506}
 
 func (i NodeType) String() string {
 	if i < 0 || i >= NodeType(len(_NodeType_index)-1) {
diff --git a/pkg/schemadsl/generator/generator.go b/pkg/schemadsl/generator/generator.go
index 995b3ecdaa..8b1c311703 100644
--- a/pkg/schemadsl/generator/generator.go
+++ b/pkg/schemadsl/generator/generator.go
@@ -202,6 +202,20 @@ func (sg *sourceGenerator) emitNamespace(namespace *core.NamespaceDefinition) er
 	sg.markNewScope()
 
 	for _, relation := range namespace.Relation {
+		if relation.Deprecation != nil && relation.Deprecation.DeprecationType != core.DeprecationType_DEPRECATED_TYPE_UNSPECIFIED {
+			sg.flags.Add("deprecation")
+			sg.append("@deprecated(")
+
+			switch relation.Deprecation.DeprecationType {
+			case core.DeprecationType_DEPRECATED_TYPE_WARNING:
+				sg.append("warn")
+			case core.DeprecationType_DEPRECATED_TYPE_ERROR:
+				sg.append("error")
+			}
+			sg.append(")")
+			sg.appendLine()
+		}
+
 		err := sg.emitRelation(relation)
 		if err != nil {
 			return err
diff --git a/pkg/schemadsl/generator/generator_test.go b/pkg/schemadsl/generator/generator_test.go
index d5e43cdc6e..67ded6b769 100644
--- a/pkg/schemadsl/generator/generator_test.go
+++ b/pkg/schemadsl/generator/generator_test.go
@@ -395,6 +395,41 @@ definition document {
 	relation viewer: user
 }`,
 		},
+		{
+			"deprecation test",
+			`use deprecation
+			definition user{}
+
+			definition document {
+
+				@deprecated(warn)
+				relation viewer: user
+				
+				@deprecated(error)
+				relation editor: user
+			}`,
+			`use deprecation
+
+definition user {}
+
+definition document {
+	@deprecated(warn)
+	relation viewer: user
+	@deprecated(error)
+	relation editor: user
+}`,
+		},
+		{
+			"unused deprecation flag",
+			`use deprecation
+			
+			definition document{
+				relation viewer: user
+		}`,
+			`definition document {
+	relation viewer: user
+}`,
+		},
 	}
 
 	for _, test := range tests {
diff --git a/pkg/schemadsl/lexer/flaggablelexer_test.go b/pkg/schemadsl/lexer/flaggablelexer_test.go
index 3ecc89bf11..330ab9c837 100644
--- a/pkg/schemadsl/lexer/flaggablelexer_test.go
+++ b/pkg/schemadsl/lexer/flaggablelexer_test.go
@@ -48,6 +48,12 @@ var flaggableLexerTests = []lexerTest{
 		{TokenTypeIdentifier, 0, "expiration", ""},
 		tEOF,
 	}},
+	{"use deprecation", "use deprecation", []Lexeme{
+		{TokenTypeIdentifier, 0, "use", ""},
+		{TokenTypeWhitespace, 0, " ", ""},
+		{TokenTypeKeyword, 0, "deprecation", ""},
+		tEOF,
+	}},
 }
 
 func TestFlaggableLexer(t *testing.T) {
diff --git a/pkg/schemadsl/lexer/flags.go b/pkg/schemadsl/lexer/flags.go
index 184e7523a6..0034495e51 100644
--- a/pkg/schemadsl/lexer/flags.go
+++ b/pkg/schemadsl/lexer/flags.go
@@ -13,6 +13,10 @@ const (
 	// FlagTypeChecking indicates that `typechecking` is supported as a first-class
 	// feature in the schema.
 	FlagTypeChecking = "typechecking"
+
+	// FlagDeprecation indicates that `deprecation` is supported as a first-class
+	// feature in the schema.
+	FlagDeprecation = "deprecation"
 )
 
 var AllUseFlags []string
@@ -41,6 +45,16 @@ var Flags = map[string]transformer{
 
 		return lexeme, false
 	},
+
+	FlagDeprecation: func(lexeme Lexeme) (Lexeme, bool) {
+		if lexeme.Kind == TokenTypeIdentifier && lexeme.Value == "deprecation" {
+			lexeme.Kind = TokenTypeKeyword
+			return lexeme, true
+		}
+
+		return lexeme, false
+	},
+
 	FlagTypeChecking: func(lexeme Lexeme) (Lexeme, bool) {
 		// `typechecking` becomes a keyword.
 		if lexeme.Kind == TokenTypeIdentifier && lexeme.Value == "typechecking" {
diff --git a/pkg/schemadsl/lexer/lex_def.go b/pkg/schemadsl/lexer/lex_def.go
index 366db87fe6..ec855359e5 100644
--- a/pkg/schemadsl/lexer/lex_def.go
+++ b/pkg/schemadsl/lexer/lex_def.go
@@ -52,6 +52,7 @@ const (
 	TokenTypeStar       // *
 
 	// Additional tokens for CEL: https://github.com/google/cel-spec/blob/master/doc/langdef.md#syntax
+	TokenTypeAt                 // @
 	TokenTypeQuestionMark       // ?
 	TokenTypeConditionalOr      // ||
 	TokenTypeConditionalAnd     // &&
@@ -78,6 +79,7 @@ var keywords = map[string]struct{}{
 	"permission": {},
 	"nil":        {},
 	"with":       {},
+	"deprecated": {},
 }
 
 // IsKeyword returns whether the specified input string is a reserved keyword.
@@ -153,6 +155,8 @@ Loop:
 
 		case r == '%':
 			l.emit(TokenTypePercent)
+		case r == '@':
+			l.emit(TokenTypeAt)
 
 		case r == '<':
 			if l.acceptString("=") {
diff --git a/pkg/schemadsl/lexer/lex_test.go b/pkg/schemadsl/lexer/lex_test.go
index a223cc2253..33198ceec7 100644
--- a/pkg/schemadsl/lexer/lex_test.go
+++ b/pkg/schemadsl/lexer/lex_test.go
@@ -46,6 +46,8 @@ var lexerTests = []lexerTest{
 	{"hash", "#", []Lexeme{{TokenTypeHash, 0, "#", ""}, tEOF}},
 	{"ellipsis", "...", []Lexeme{{TokenTypeEllipsis, 0, "...", ""}, tEOF}},
 
+	{"token @", "@", []Lexeme{{TokenTypeAt, 0, "@", ""}, tEOF}},
+
 	{"relation reference", "foo#...", []Lexeme{
 		{TokenTypeIdentifier, 0, "foo", ""},
 		{TokenTypeHash, 0, "#", ""},
@@ -257,6 +259,19 @@ var lexerTests = []lexerTest{
 		{TokenTypeRightParen, 0, ")", ""},
 		tEOF,
 	}},
+	{"deprecation test with keyword", "@deprecated", []Lexeme{
+		{TokenTypeAt, 0, "@", ""},
+		{TokenTypeKeyword, 0, "deprecated", ""},
+		tEOF,
+	}},
+	{"deprecation test with keyword and identifier", "@deprecated(something)", []Lexeme{
+		{TokenTypeAt, 0, "@", ""},
+		{TokenTypeKeyword, 0, "deprecated", ""},
+		{TokenTypeLeftParen, 0, "(", ""},
+		{TokenTypeIdentifier, 0, "something", ""},
+		{TokenTypeRightParen, 0, ")", ""},
+		tEOF,
+	}},
 }
 
 func TestLexer(t *testing.T) {
diff --git a/pkg/schemadsl/lexer/tokentype_string.go b/pkg/schemadsl/lexer/tokentype_string.go
index 79f358589c..7c29e0484c 100644
--- a/pkg/schemadsl/lexer/tokentype_string.go
+++ b/pkg/schemadsl/lexer/tokentype_string.go
@@ -34,27 +34,28 @@ func _() {
 	_ = x[TokenTypeHash-23]
 	_ = x[TokenTypeEllipsis-24]
 	_ = x[TokenTypeStar-25]
-	_ = x[TokenTypeQuestionMark-26]
-	_ = x[TokenTypeConditionalOr-27]
-	_ = x[TokenTypeConditionalAnd-28]
-	_ = x[TokenTypeExclamationPoint-29]
-	_ = x[TokenTypeLeftBracket-30]
-	_ = x[TokenTypeRightBracket-31]
-	_ = x[TokenTypePeriod-32]
-	_ = x[TokenTypeComma-33]
-	_ = x[TokenTypePercent-34]
-	_ = x[TokenTypeLessThan-35]
-	_ = x[TokenTypeGreaterThan-36]
-	_ = x[TokenTypeLessThanOrEqual-37]
-	_ = x[TokenTypeGreaterThanOrEqual-38]
-	_ = x[TokenTypeEqualEqual-39]
-	_ = x[TokenTypeNotEqual-40]
-	_ = x[TokenTypeString-41]
+	_ = x[TokenTypeAt-26]
+	_ = x[TokenTypeQuestionMark-27]
+	_ = x[TokenTypeConditionalOr-28]
+	_ = x[TokenTypeConditionalAnd-29]
+	_ = x[TokenTypeExclamationPoint-30]
+	_ = x[TokenTypeLeftBracket-31]
+	_ = x[TokenTypeRightBracket-32]
+	_ = x[TokenTypePeriod-33]
+	_ = x[TokenTypeComma-34]
+	_ = x[TokenTypePercent-35]
+	_ = x[TokenTypeLessThan-36]
+	_ = x[TokenTypeGreaterThan-37]
+	_ = x[TokenTypeLessThanOrEqual-38]
+	_ = x[TokenTypeGreaterThanOrEqual-39]
+	_ = x[TokenTypeEqualEqual-40]
+	_ = x[TokenTypeNotEqual-41]
+	_ = x[TokenTypeString-42]
 }
 
-const _TokenType_name = "TokenTypeErrorTokenTypeSyntheticSemicolonTokenTypeEOFTokenTypeWhitespaceTokenTypeSinglelineCommentTokenTypeMultilineCommentTokenTypeNewlineTokenTypeKeywordTokenTypeIdentifierTokenTypeNumberTokenTypeLeftBraceTokenTypeRightBraceTokenTypeLeftParenTokenTypeRightParenTokenTypePipeTokenTypePlusTokenTypeMinusTokenTypeAndTokenTypeDivTokenTypeEqualsTokenTypeColonTokenTypeSemicolonTokenTypeRightArrowTokenTypeHashTokenTypeEllipsisTokenTypeStarTokenTypeQuestionMarkTokenTypeConditionalOrTokenTypeConditionalAndTokenTypeExclamationPointTokenTypeLeftBracketTokenTypeRightBracketTokenTypePeriodTokenTypeCommaTokenTypePercentTokenTypeLessThanTokenTypeGreaterThanTokenTypeLessThanOrEqualTokenTypeGreaterThanOrEqualTokenTypeEqualEqualTokenTypeNotEqualTokenTypeString"
+const _TokenType_name = "TokenTypeErrorTokenTypeSyntheticSemicolonTokenTypeEOFTokenTypeWhitespaceTokenTypeSinglelineCommentTokenTypeMultilineCommentTokenTypeNewlineTokenTypeKeywordTokenTypeIdentifierTokenTypeNumberTokenTypeLeftBraceTokenTypeRightBraceTokenTypeLeftParenTokenTypeRightParenTokenTypePipeTokenTypePlusTokenTypeMinusTokenTypeAndTokenTypeDivTokenTypeEqualsTokenTypeColonTokenTypeSemicolonTokenTypeRightArrowTokenTypeHashTokenTypeEllipsisTokenTypeStarTokenTypeAtTokenTypeQuestionMarkTokenTypeConditionalOrTokenTypeConditionalAndTokenTypeExclamationPointTokenTypeLeftBracketTokenTypeRightBracketTokenTypePeriodTokenTypeCommaTokenTypePercentTokenTypeLessThanTokenTypeGreaterThanTokenTypeLessThanOrEqualTokenTypeGreaterThanOrEqualTokenTypeEqualEqualTokenTypeNotEqualTokenTypeString"
 
-var _TokenType_index = [...]uint16{0, 14, 41, 53, 72, 98, 123, 139, 155, 174, 189, 207, 226, 244, 263, 276, 289, 303, 315, 327, 342, 356, 374, 393, 406, 423, 436, 457, 479, 502, 527, 547, 568, 583, 597, 613, 630, 650, 674, 701, 720, 737, 752}
+var _TokenType_index = [...]uint16{0, 14, 41, 53, 72, 98, 123, 139, 155, 174, 189, 207, 226, 244, 263, 276, 289, 303, 315, 327, 342, 356, 374, 393, 406, 423, 436, 447, 468, 490, 513, 538, 558, 579, 594, 608, 624, 641, 661, 685, 712, 731, 748, 763}
 
 func (i TokenType) String() string {
 	if i < 0 || i >= TokenType(len(_TokenType_index)-1) {
diff --git a/pkg/schemadsl/parser/parser.go b/pkg/schemadsl/parser/parser.go
index 507188c339..14e93618b3 100644
--- a/pkg/schemadsl/parser/parser.go
+++ b/pkg/schemadsl/parser/parser.go
@@ -69,6 +69,9 @@ Loop:
 			hasSeenDefinition = true
 			rootNode.Connect(dslshape.NodePredicateChild, p.consumeCaveat())
 
+		case p.isToken(lexer.TokenTypeAt):
+			rootNode.Connect(dslshape.NodePredicateChild, p.consumeDeprecation())
+
 		default:
 			p.emitErrorf("Unexpected token at root level: %v", p.currentToken.Kind)
 			break Loop
@@ -298,7 +301,7 @@ func (p *sourceParser) consumeDefinition() AstNode {
 		return defNode
 	}
 
-	// Relations and permissions.
+	// Relations and permissions and associated deprecations for objects and relations.
 	for {
 		// }
 		if _, ok := p.tryConsume(lexer.TokenTypeRightBrace); ok {
@@ -308,19 +311,23 @@ func (p *sourceParser) consumeDefinition() AstNode {
 		// relation ...
 		// permission ...
 		switch {
+		case p.isToken(lexer.TokenTypeAt):
+			defNode.Connect(dslshape.NodePredicateChild, p.consumeDeprecation())
+
+		case p.isToken(lexer.TokenTypeAt):
+			defNode.Connect(dslshape.NodePredicateChild, p.consumeDeprecation())
+
 		case p.isKeyword("relation"):
 			defNode.Connect(dslshape.NodePredicateChild, p.consumeRelation())
 
 		case p.isKeyword("permission"):
 			defNode.Connect(dslshape.NodePredicateChild, p.consumePermission())
 		}
-
 		ok := p.consumeStatementTerminator()
 		if !ok {
 			break
 		}
 	}
-
 	return defNode
 }
 
@@ -351,6 +358,96 @@ func (p *sourceParser) consumeRelation() AstNode {
 	return relNode
 }
 
+// consumeDeprecation consumes a deprecation statement
+// ```@deprecated(type, object, relation)```
+func (p *sourceParser) consumeDeprecation() AstNode {
+	depNode := p.startNode(dslshape.NodeTypeDeprecation)
+	defer p.mustFinishNode()
+
+	p.consume(lexer.TokenTypeAt)
+
+	ok := p.consumeKeyword("deprecated")
+	if !ok {
+		return depNode
+	}
+
+	_, ok = p.tryConsume(lexer.TokenTypeLeftParen)
+	if !ok {
+		p.emitErrorf("Expected '(' after 'deprecated' keyword")
+		return depNode
+	}
+
+	// Required: deprecation type
+	deprecationType, ok := p.tryConsume(lexer.TokenTypeIdentifier)
+	if !ok {
+		p.emitErrorf("Expected identifier for deprecation type")
+		return depNode
+	}
+	depNode.MustDecorate(dslshape.NodeDeprecatedType, deprecationType.Value)
+
+	// Try consume after every opt.
+	if p.isToken(lexer.TokenTypeRightParen) {
+		p.consume(lexer.TokenTypeRightParen)
+		return depNode
+	}
+
+	_, ok = p.tryConsume(lexer.TokenTypeComma)
+	if !ok {
+		p.emitErrorf("Expected ',' after deprecation type")
+		return depNode
+	}
+
+	// A comment
+	if p.isToken(lexer.TokenTypeString) {
+		commentTok, _ := p.tryConsume(lexer.TokenTypeString)
+		comment := strings.Trim(commentTok.Value, `"`)
+		depNode.MustDecorate(dslshape.NodeDeprecatedComments, comment)
+
+		p.consume(lexer.TokenTypeRightParen)
+		return depNode
+	}
+
+	if p.isToken(lexer.TokenTypeIdentifier) {
+		// Object
+		objectTok, _ := p.tryConsume(lexer.TokenTypeIdentifier)
+		depNode.MustDecorate(dslshape.NodeDeprecatedObject, objectTok.Value)
+
+		// Check if relation follows: #
+		if p.isToken(lexer.TokenTypeHash) {
+			p.consume(lexer.TokenTypeHash)
+			if !p.isToken(lexer.TokenTypeIdentifier) {
+				p.emitErrorf("Expected identifier for deprecation relation after '#'")
+			} else {
+				relTok, _ := p.tryConsume(lexer.TokenTypeIdentifier)
+				depNode.MustDecorate(dslshape.NodeTypeDeprecatedRelation, relTok.Value)
+			}
+		}
+
+		if p.isToken(lexer.TokenTypeRightParen) {
+			p.consume(lexer.TokenTypeRightParen)
+			return depNode
+		}
+
+		_, ok = p.tryConsume(lexer.TokenTypeComma)
+		if !ok {
+			p.emitErrorf("Expected ',' after deprecation object or object#relation")
+		} else if p.isToken(lexer.TokenTypeString) {
+			commentTok, _ := p.tryConsume(lexer.TokenTypeString)
+			comment := strings.Trim(commentTok.Value, `"`)
+			depNode.MustDecorate(dslshape.NodeDeprecatedComments, comment)
+		} else {
+			p.emitErrorf("Expected string value for deprecation comment")
+		}
+
+		p.consume(lexer.TokenTypeRightParen)
+		return depNode
+	}
+
+	// If it's neither string nor identifier, it's invalid
+	p.emitErrorf("Unexpected token after deprecation type: %s", p.currentToken.Value)
+	return depNode
+}
+
 // consumeTypeReference consumes a reference to a type or types of relations.
 // ```sometype | anothertype | anothertype:* ```
 func (p *sourceParser) consumeTypeReference() AstNode {
diff --git a/pkg/schemadsl/parser/parser_test.go b/pkg/schemadsl/parser/parser_test.go
index 8ec639f581..a8fad175d4 100644
--- a/pkg/schemadsl/parser/parser_test.go
+++ b/pkg/schemadsl/parser/parser_test.go
@@ -142,6 +142,23 @@ func TestParser(t *testing.T) {
 		{"permission type annotation double colon test", "permission_type_annotation_double_colon"},
 		{"permission type annotation newline after colon test", "permission_type_annotation_newline_after_colon"},
 		{"permission type annotation just pipe test", "permission_type_annotation_just_pipe"},
+		{"use typechecking test", "use_typechecking"},
+		{"permission type annotation test", "permission_type_annotation"},
+		{"permission mixed annotations test", "permission_mixed_annotations"},
+		{"permission multiple types test", "permission_multiple_types"},
+		{"permission mixed single multiple test", "permission_mixed_single_multiple"},
+		{"permission edge cases test", "permission_edge_cases"},
+		{"permission type annotation empty after colon test", "permission_type_annotation_empty_after_colon"},
+		{"permission type annotation pipe no type before test", "permission_type_annotation_pipe_no_type_before"},
+		{"permission type annotation trailing pipe no type after test", "permission_type_annotation_trailing_pipe_no_type_after"},
+		{"permission type annotation double colon test", "permission_type_annotation_double_colon"},
+		{"permission type annotation newline after colon test", "permission_type_annotation_newline_after_colon"},
+		{"permission type annotation just pipe test", "permission_type_annotation_just_pipe"},
+		{"deprecated relation test", "deprecation"},
+		{"invalid deprecated relation test", "invalid-deprecation"},
+		{"deprecated options test", "deprecated_options"},
+		{"deprecation which is outside of a definition", "deprecation_outside_definition"},
+		{"multiple deprecations with comments", "multiple_deprecations"},
 	}
 
 	for _, test := range parserTests {
diff --git a/pkg/schemadsl/parser/tests/deprecated_options.zed b/pkg/schemadsl/parser/tests/deprecated_options.zed
new file mode 100644
index 0000000000..8b8e617105
--- /dev/null
+++ b/pkg/schemadsl/parser/tests/deprecated_options.zed
@@ -0,0 +1,14 @@
+use deprecation
+
+definition deprecated_relation {
+
+    @deprecated(warn, user, "comments")
+    relation writer: user
+
+
+    @deprecated(error, testuser)
+    relation reader: user
+}
+
+definition user {}
+definition testuser {}
\ No newline at end of file
diff --git a/pkg/schemadsl/parser/tests/deprecated_options.zed.expected b/pkg/schemadsl/parser/tests/deprecated_options.zed.expected
new file mode 100644
index 0000000000..d79574cecc
--- /dev/null
+++ b/pkg/schemadsl/parser/tests/deprecated_options.zed.expected
@@ -0,0 +1,71 @@
+NodeTypeFile
+  end-rune = 221
+  input-source = deprecated options test
+  start-rune = 0
+  child-node =>
+    NodeTypeUseFlag
+      end-rune = 14
+      input-source = deprecated options test
+      start-rune = 0
+      use-flag-name = deprecation
+    NodeTypeDefinition
+      definition-name = deprecated_relation
+      end-rune = 178
+      input-source = deprecated options test
+      start-rune = 17
+      child-node =>
+        NodeTypeDeprecation
+          deprecation-comments = comments
+          deprecation-object = user
+          deprecation-type = warn
+          end-rune = 89
+          input-source = deprecated options test
+          start-rune = 55
+        NodeTypeRelation
+          end-rune = 115
+          input-source = deprecated options test
+          relation-name = writer
+          start-rune = 95
+          allowed-types =>
+            NodeTypeTypeReference
+              end-rune = 115
+              input-source = deprecated options test
+              start-rune = 112
+              type-ref-type =>
+                NodeTypeSpecificTypeReference
+                  end-rune = 115
+                  input-source = deprecated options test
+                  start-rune = 112
+                  type-name = user
+        NodeTypeDeprecation
+          deprecation-object = testuser
+          deprecation-type = error
+          end-rune = 150
+          input-source = deprecated options test
+          start-rune = 123
+        NodeTypeRelation
+          end-rune = 176
+          input-source = deprecated options test
+          relation-name = reader
+          start-rune = 156
+          allowed-types =>
+            NodeTypeTypeReference
+              end-rune = 176
+              input-source = deprecated options test
+              start-rune = 173
+              type-ref-type =>
+                NodeTypeSpecificTypeReference
+                  end-rune = 176
+                  input-source = deprecated options test
+                  start-rune = 173
+                  type-name = user
+    NodeTypeDefinition
+      definition-name = user
+      end-rune = 198
+      input-source = deprecated options test
+      start-rune = 181
+    NodeTypeDefinition
+      definition-name = testuser
+      end-rune = 221
+      input-source = deprecated options test
+      start-rune = 200
diff --git a/pkg/schemadsl/parser/tests/deprecation.zed b/pkg/schemadsl/parser/tests/deprecation.zed
new file mode 100644
index 0000000000..f41bda7b8e
--- /dev/null
+++ b/pkg/schemadsl/parser/tests/deprecation.zed
@@ -0,0 +1,12 @@
+use deprecation
+
+definition deprecated_relation {
+
+    @deprecated(warn)
+    relation writer: user
+
+    @deprecated(error)
+    relation reader: user
+}
+
+definition user {}
\ No newline at end of file
diff --git a/pkg/schemadsl/parser/tests/deprecation.zed.expected b/pkg/schemadsl/parser/tests/deprecation.zed.expected
new file mode 100644
index 0000000000..38332ddb83
--- /dev/null
+++ b/pkg/schemadsl/parser/tests/deprecation.zed.expected
@@ -0,0 +1,63 @@
+NodeTypeFile
+  end-rune = 169
+  input-source = deprecated relation test
+  start-rune = 0
+  child-node =>
+    NodeTypeUseFlag
+      end-rune = 14
+      input-source = deprecated relation test
+      start-rune = 0
+      use-flag-name = deprecation
+    NodeTypeDefinition
+      definition-name = deprecated_relation
+      end-rune = 149
+      input-source = deprecated relation test
+      start-rune = 17
+      child-node =>
+        NodeTypeDeprecation
+          deprecation-type = warn
+          end-rune = 71
+          input-source = deprecated relation test
+          start-rune = 55
+        NodeTypeRelation
+          end-rune = 97
+          input-source = deprecated relation test
+          relation-name = writer
+          start-rune = 77
+          allowed-types =>
+            NodeTypeTypeReference
+              end-rune = 97
+              input-source = deprecated relation test
+              start-rune = 94
+              type-ref-type =>
+                NodeTypeSpecificTypeReference
+                  end-rune = 97
+                  input-source = deprecated relation test
+                  start-rune = 94
+                  type-name = user
+        NodeTypeDeprecation
+          deprecation-type = error
+          end-rune = 121
+          input-source = deprecated relation test
+          start-rune = 104
+        NodeTypeRelation
+          end-rune = 147
+          input-source = deprecated relation test
+          relation-name = reader
+          start-rune = 127
+          allowed-types =>
+            NodeTypeTypeReference
+              end-rune = 147
+              input-source = deprecated relation test
+              start-rune = 144
+              type-ref-type =>
+                NodeTypeSpecificTypeReference
+                  end-rune = 147
+                  input-source = deprecated relation test
+                  start-rune = 144
+                  type-name = user
+    NodeTypeDefinition
+      definition-name = user
+      end-rune = 169
+      input-source = deprecated relation test
+      start-rune = 152
\ No newline at end of file
diff --git a/pkg/schemadsl/parser/tests/deprecation_outside_definition.zed b/pkg/schemadsl/parser/tests/deprecation_outside_definition.zed
new file mode 100644
index 0000000000..60a7ac59c5
--- /dev/null
+++ b/pkg/schemadsl/parser/tests/deprecation_outside_definition.zed
@@ -0,0 +1,15 @@
+use deprecation
+
+definition user {}
+definition testuser {}
+
+definition deprecated_relation {
+
+    relation writer: user
+
+
+    @deprecated(error, testuser)
+    relation reader: user
+}
+
+@deprecated(warn, user, "comments")
\ No newline at end of file
diff --git a/pkg/schemadsl/parser/tests/deprecation_outside_definition.zed.expected b/pkg/schemadsl/parser/tests/deprecation_outside_definition.zed.expected
new file mode 100644
index 0000000000..4ef41d852c
--- /dev/null
+++ b/pkg/schemadsl/parser/tests/deprecation_outside_definition.zed.expected
@@ -0,0 +1,71 @@
+NodeTypeFile
+  end-rune = 218
+  input-source = deprecation which is outside of a definition
+  start-rune = 0
+  child-node =>
+    NodeTypeUseFlag
+      end-rune = 14
+      input-source = deprecation which is outside of a definition
+      start-rune = 0
+      use-flag-name = deprecation
+    NodeTypeDefinition
+      definition-name = user
+      end-rune = 34
+      input-source = deprecation which is outside of a definition
+      start-rune = 17
+    NodeTypeDefinition
+      definition-name = testuser
+      end-rune = 57
+      input-source = deprecation which is outside of a definition
+      start-rune = 36
+    NodeTypeDefinition
+      definition-name = deprecated_relation
+      end-rune = 181
+      input-source = deprecation which is outside of a definition
+      start-rune = 60
+      child-node =>
+        NodeTypeRelation
+          end-rune = 118
+          input-source = deprecation which is outside of a definition
+          relation-name = writer
+          start-rune = 98
+          allowed-types =>
+            NodeTypeTypeReference
+              end-rune = 118
+              input-source = deprecation which is outside of a definition
+              start-rune = 115
+              type-ref-type =>
+                NodeTypeSpecificTypeReference
+                  end-rune = 118
+                  input-source = deprecation which is outside of a definition
+                  start-rune = 115
+                  type-name = user
+        NodeTypeDeprecation
+          deprecation-object = testuser
+          deprecation-type = error
+          end-rune = 153
+          input-source = deprecation which is outside of a definition
+          start-rune = 126
+        NodeTypeRelation
+          end-rune = 179
+          input-source = deprecation which is outside of a definition
+          relation-name = reader
+          start-rune = 159
+          allowed-types =>
+            NodeTypeTypeReference
+              end-rune = 179
+              input-source = deprecation which is outside of a definition
+              start-rune = 176
+              type-ref-type =>
+                NodeTypeSpecificTypeReference
+                  end-rune = 179
+                  input-source = deprecation which is outside of a definition
+                  start-rune = 176
+                  type-name = user
+    NodeTypeDeprecation
+      deprecation-comments = comments
+      deprecation-object = user
+      deprecation-type = warn
+      end-rune = 218
+      input-source = deprecation which is outside of a definition
+      start-rune = 184
diff --git a/pkg/schemadsl/parser/tests/invalid-deprecation.zed b/pkg/schemadsl/parser/tests/invalid-deprecation.zed
new file mode 100644
index 0000000000..24a730bdc6
--- /dev/null
+++ b/pkg/schemadsl/parser/tests/invalid-deprecation.zed
@@ -0,0 +1,6 @@
+definition deprecated_relation {
+    @deprecated()
+    relation reader: user
+}
+
+definition user {}
\ No newline at end of file
diff --git a/pkg/schemadsl/parser/tests/invalid-deprecation.zed.expected b/pkg/schemadsl/parser/tests/invalid-deprecation.zed.expected
new file mode 100644
index 0000000000..8300143dac
--- /dev/null
+++ b/pkg/schemadsl/parser/tests/invalid-deprecation.zed.expected
@@ -0,0 +1,34 @@
+NodeTypeFile
+  end-rune = 48
+  input-source = invalid deprecated relation test
+  start-rune = 0
+  child-node =>
+    NodeTypeDefinition
+      definition-name = deprecated_relation
+      end-rune = 48
+      input-source = invalid deprecated relation test
+      start-rune = 0
+      child-node =>
+        NodeTypeDeprecation
+          end-rune = 48
+          input-source = invalid deprecated relation test
+          start-rune = 37
+          child-node =>
+            NodeTypeError
+              end-rune = 48
+              error-message = Expected identifier for deprecation type
+              error-source = )
+              input-source = invalid deprecated relation test
+              start-rune = 49
+        NodeTypeError
+          end-rune = 48
+          error-message = Expected end of statement or definition, found: TokenTypeRightParen
+          error-source = )
+          input-source = invalid deprecated relation test
+          start-rune = 49
+    NodeTypeError
+      end-rune = 48
+      error-message = Unexpected token at root level: TokenTypeRightParen
+      error-source = )
+      input-source = invalid deprecated relation test
+      start-rune = 49
\ No newline at end of file
diff --git a/pkg/schemadsl/parser/tests/invaliduse.zed.expected b/pkg/schemadsl/parser/tests/invaliduse.zed.expected
index 50f1468985..f399586130 100644
--- a/pkg/schemadsl/parser/tests/invaliduse.zed.expected
+++ b/pkg/schemadsl/parser/tests/invaliduse.zed.expected
@@ -10,7 +10,7 @@ NodeTypeFile
       child-node =>
         NodeTypeError
           end-rune = 12
-          error-message = Unknown use flag: `something`. Options are: expiration, typechecking
+          error-message = Unknown use flag: `something`. Options are: deprecation, expiration, typechecking
           error-source = 
 
           input-source = invalid use
diff --git a/pkg/schemadsl/parser/tests/multiple_deprecations.zed b/pkg/schemadsl/parser/tests/multiple_deprecations.zed
new file mode 100644
index 0000000000..2c246d6d8e
--- /dev/null
+++ b/pkg/schemadsl/parser/tests/multiple_deprecations.zed
@@ -0,0 +1,19 @@
+use deprecation
+
+definition user {}
+definition testuser {}
+definition superuser{}
+
+definition deprecated_relation {
+
+    relation writer: user
+
+
+    @deprecated(warn, testuser, "oops deprecated!")
+    relation reader: testuser
+
+    relation editor: superuser
+}
+
+@deprecated(error, user, "obj user is deprecated, use superuser instead")
+@deprecated(warn, deprecated_relation#editor, "rel editor is deprecated")
\ No newline at end of file
diff --git a/pkg/schemadsl/parser/tests/multiple_deprecations.zed.expected b/pkg/schemadsl/parser/tests/multiple_deprecations.zed.expected
new file mode 100644
index 0000000000..ab5a291314
--- /dev/null
+++ b/pkg/schemadsl/parser/tests/multiple_deprecations.zed.expected
@@ -0,0 +1,101 @@
+NodeTypeFile
+  end-rune = 408
+  input-source = multiple deprecations with comments
+  start-rune = 0
+  child-node =>
+    NodeTypeUseFlag
+      end-rune = 14
+      input-source = multiple deprecations with comments
+      start-rune = 0
+      use-flag-name = deprecation
+    NodeTypeDefinition
+      definition-name = user
+      end-rune = 34
+      input-source = multiple deprecations with comments
+      start-rune = 17
+    NodeTypeDefinition
+      definition-name = testuser
+      end-rune = 57
+      input-source = multiple deprecations with comments
+      start-rune = 36
+    NodeTypeDefinition
+      definition-name = superuser
+      end-rune = 80
+      input-source = multiple deprecations with comments
+      start-rune = 59
+    NodeTypeDefinition
+      definition-name = deprecated_relation
+      end-rune = 259
+      input-source = multiple deprecations with comments
+      start-rune = 83
+      child-node =>
+        NodeTypeRelation
+          end-rune = 141
+          input-source = multiple deprecations with comments
+          relation-name = writer
+          start-rune = 121
+          allowed-types =>
+            NodeTypeTypeReference
+              end-rune = 141
+              input-source = multiple deprecations with comments
+              start-rune = 138
+              type-ref-type =>
+                NodeTypeSpecificTypeReference
+                  end-rune = 141
+                  input-source = multiple deprecations with comments
+                  start-rune = 138
+                  type-name = user
+        NodeTypeDeprecation
+          deprecation-comments = oops deprecated!
+          deprecation-object = testuser
+          deprecation-type = warn
+          end-rune = 195
+          input-source = multiple deprecations with comments
+          start-rune = 149
+        NodeTypeRelation
+          end-rune = 225
+          input-source = multiple deprecations with comments
+          relation-name = reader
+          start-rune = 201
+          allowed-types =>
+            NodeTypeTypeReference
+              end-rune = 225
+              input-source = multiple deprecations with comments
+              start-rune = 218
+              type-ref-type =>
+                NodeTypeSpecificTypeReference
+                  end-rune = 225
+                  input-source = multiple deprecations with comments
+                  start-rune = 218
+                  type-name = testuser
+        NodeTypeRelation
+          end-rune = 257
+          input-source = multiple deprecations with comments
+          relation-name = editor
+          start-rune = 232
+          allowed-types =>
+            NodeTypeTypeReference
+              end-rune = 257
+              input-source = multiple deprecations with comments
+              start-rune = 249
+              type-ref-type =>
+                NodeTypeSpecificTypeReference
+                  end-rune = 257
+                  input-source = multiple deprecations with comments
+                  start-rune = 249
+                  type-name = superuser
+    NodeTypeDeprecation
+      deprecation-comments = obj user is deprecated, use superuser instead
+      deprecation-object = user
+      deprecation-type = error
+      end-rune = 334
+      input-source = multiple deprecations with comments
+      start-rune = 262
+    NodeTypeDeprecation
+      deprecation-comments = rel editor is deprecated
+      deprecation-object = deprecated_relation
+      deprecation-relation = editor
+      deprecation-type = warn
+      end-rune = 408
+      input-source = multiple deprecations with comments
+      start-rune = 336
\ No newline at end of file
diff --git a/proto/internal/core/v1/core.proto b/proto/internal/core/v1/core.proto
index a393eed149..41f7938358 100644
--- a/proto/internal/core/v1/core.proto
+++ b/proto/internal/core/v1/core.proto
@@ -204,6 +204,43 @@ message NamespaceDefinition {
 
   /** source_position contains the position of the namespace in the source schema, if any */
   SourcePosition source_position = 4;
+
+  /** deprecation contains the deprecation information for the namespace, if any */
+  Deprecation deprecation = 5;
+}
+
+/**
+ * DeprecationType is the type of deprecation for a relation.
+ */
+enum DeprecationType {
+  DEPRECATED_TYPE_UNSPECIFIED = 0;
+  DEPRECATED_TYPE_WARNING = 1;
+  DEPRECATED_TYPE_ERROR = 2;
+}
+/**
+ * Deprecation represents the deprecation information for a relation and object.
+ * It contains the type of deprecation, a comment to show when the relation is used,
+ * and the source position of the deprecation in the source schema, if any.
+ */
+
+message Deprecation {
+  /**
+   * deprecation_type is the type of deprecation for the relation.
+   * It can be either a warning or an error, defaults to unspecified.
+   */
+  DeprecationType deprecation_type = 1 [(validate.rules).enum.defined_only = true];
+
+  /** object is the object that is deprecated */
+  string object = 2;
+
+  /** relation is the relation that is deprecated */
+  string relation = 3;
+
+  /** comments are the comments to show when the relation is used */
+  string comments = 4 [(validate.rules).string = {max_bytes: 256}];
+
+  /** source_position contains the position of the deprecation in the source schema, if any */
+  SourcePosition source_position = 5;
 }
 
 /**
@@ -233,6 +270,9 @@ message Relation {
 
   string aliasing_relation = 6;
   string canonical_cache_key = 7;
+
+  /** deprecation_type is the type of deprecation for the relation */
+  Deprecation deprecation = 8;
 }
 
 /**
@@ -420,6 +460,11 @@ message AllowedRelation {
    * required_expiration defines the required expiration on this relation.
    */
   ExpirationTrait required_expiration = 7;
+
+  /**
+   * deprecation_type defines the type of deprecation for this relation.
+   */
+  Deprecation deprecation = 8;
 }
 
 /**