diff --git a/.repository-projection.json b/.repository-projection.json
index 557c6eb..3717c4d 100644
--- a/.repository-projection.json
+++ b/.repository-projection.json
@@ -3,11 +3,11 @@
   "projection": "api",
   "projectionSchemaVersion": 1,
   "sourceRepository": "dx-corp/mono",
-  "sourceSha": "2a7522b52a13fe770f480745fa7b41ac2188a9e7",
+  "sourceSha": "896601b95934732649448c8b302a834b3570527a",
   "destinationRepository": "dx-corp/api",
-  "priorProjectedBase": "65020664845801c739014b317649009eb2e93deb",
+  "priorProjectedBase": "53236c02b00840ddcc58cb5c67c06a0695f660b7",
   "definitionDigest": "4c1601bee99ccc8305013324608e9c146999b21427179d25fd342f69aebd37bd",
-  "toolDigest": "0b559427b4956119349f84f6b203c0877aaec738",
-  "contentDigest": "f1362d89f3cac276bd3d7addc592b4934dc40c2b67cbe218b232949e2350d928",
+  "toolDigest": "e416387d26f2b9d992678cbdd4b73eb10dfb071f",
+  "contentDigest": "37b6a72881c1306e34a0c52e7c32bd4683948dd3d932eb797df15e6e1987e1ee",
   "publicationEligible": true
 }
diff --git a/openapi/deixicpublic/v1/sdk.openapi.yaml b/openapi/deixicpublic/v1/sdk.openapi.yaml
index e6c031d..58a00dc 100644
--- a/openapi/deixicpublic/v1/sdk.openapi.yaml
+++ b/openapi/deixicpublic/v1/sdk.openapi.yaml
@@ -849,6 +849,44 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/deixicpublic.v1.UpsertBusinessObjectResponse'
+  /deixicpublic.v1.DeixicPublicService/TransitionBusinessObject:
+    post:
+      tags:
+        - deixicpublic.v1.DeixicPublicService
+      summary: TransitionBusinessObject
+      description: |-
+        Moves a record of a type with a lifecycle facet through one declared
+         transition at an exact revision.
+      operationId: deixicpublic.v1.DeixicPublicService.TransitionBusinessObject
+      parameters:
+        - name: Connect-Protocol-Version
+          in: header
+          required: true
+          schema:
+            $ref: '#/components/schemas/connect-protocol-version'
+        - name: Connect-Timeout-Ms
+          in: header
+          schema:
+            $ref: '#/components/schemas/connect-timeout-header'
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/deixicpublic.v1.TransitionBusinessObjectRequest'
+        required: true
+      responses:
+        default:
+          description: Error
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/connect.error'
+        "200":
+          description: Success
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/deixicpublic.v1.TransitionBusinessObjectResponse'
   /deixicpublic.v1.DeixicPublicService/ListBusinessBlueprints:
     post:
       tags:
@@ -2211,6 +2249,23 @@ components:
       title: BusinessBlueprintOrigin
       additionalProperties: false
       description: Names the built-in blueprint member a tenant type was cloned from.
+    deixicpublic.v1.BusinessDisplayFacet:
+      type: object
+      properties:
+        icon:
+          type: string
+          title: icon
+        navSection:
+          type: string
+          title: nav_section
+        listFieldIds:
+          type: array
+          items:
+            type: string
+          title: list_field_ids
+      title: BusinessDisplayFacet
+      additionalProperties: false
+      description: Navigation and list presentation.
     deixicpublic.v1.BusinessFieldValue:
       type: object
       oneOf:
@@ -2336,6 +2391,167 @@ components:
           title: field_id
       title: BusinessFieldValue
       additionalProperties: false
+    deixicpublic.v1.BusinessGraphFacet:
+      type: object
+      properties:
+        thingKind:
+          type: string
+          title: thing_kind
+        relations:
+          type: array
+          items:
+            $ref: '#/components/schemas/deixicpublic.v1.BusinessGraphRelation'
+          title: relations
+      title: BusinessGraphFacet
+      additionalProperties: false
+      description: How records project into the graph.
+    deixicpublic.v1.BusinessGraphRelation:
+      type: object
+      properties:
+        fieldId:
+          type: string
+          title: field_id
+        relation:
+          type: string
+          title: relation
+        inbound:
+          type: boolean
+          title: inbound
+          description: The referenced record is the edge's source.
+      title: BusinessGraphRelation
+      additionalProperties: false
+      description: The relation one reference field draws.
+    deixicpublic.v1.BusinessIndexFacet:
+      type: object
+      properties:
+        indexedFieldIds:
+          type: array
+          items:
+            type: string
+          title: indexed_field_ids
+        sortableFieldIds:
+          type: array
+          items:
+            type: string
+          title: sortable_field_ids
+      title: BusinessIndexFacet
+      additionalProperties: false
+      description: Fields readers filter and sort by.
+    deixicpublic.v1.BusinessLifecycleApproval:
+      type: object
+      properties:
+        reviewerEntitlement:
+          type: string
+          title: reviewer_entitlement
+        distinctFromCreator:
+          type: boolean
+          title: distinct_from_creator
+        notify:
+          type: string
+          title: notify
+        toState:
+          type: string
+          title: to_state
+          description: A declared state the approval also moves the record to.
+      title: BusinessLifecycleApproval
+      additionalProperties: false
+    deixicpublic.v1.BusinessLifecycleDue:
+      type: object
+      properties:
+        fieldId:
+          type: string
+          title: field_id
+        assigneeFieldId:
+          type: string
+          title: assignee_field_id
+        future:
+          type: boolean
+          title: future
+        maxDaysAhead:
+          type: integer
+          title: max_days_ahead
+          nullable: true
+      title: BusinessLifecycleDue
+      additionalProperties: false
+    deixicpublic.v1.BusinessLifecycleFacet:
+      type: object
+      properties:
+        states:
+          type: array
+          items:
+            $ref: '#/components/schemas/deixicpublic.v1.BusinessLifecycleState'
+          title: states
+        transitions:
+          type: array
+          items:
+            $ref: '#/components/schemas/deixicpublic.v1.BusinessLifecycleTransition'
+          title: transitions
+        approval:
+          title: approval
+          $ref: '#/components/schemas/deixicpublic.v1.BusinessLifecycleApproval'
+        due:
+          title: due
+          $ref: '#/components/schemas/deixicpublic.v1.BusinessLifecycleDue'
+      title: BusinessLifecycleFacet
+      additionalProperties: false
+      description: States, transitions, approval and due date.
+    deixicpublic.v1.BusinessLifecycleState:
+      type: object
+      properties:
+        stateId:
+          type: string
+          title: state_id
+        name:
+          type: string
+          title: name
+        initial:
+          type: boolean
+          title: initial
+        terminal:
+          type: boolean
+          title: terminal
+      title: BusinessLifecycleState
+      additionalProperties: false
+    deixicpublic.v1.BusinessLifecycleTransition:
+      type: object
+      properties:
+        transitionId:
+          type: string
+          title: transition_id
+        name:
+          type: string
+          title: name
+        fromStates:
+          type: array
+          items:
+            type: string
+          title: from_states
+        toState:
+          type: string
+          title: to_state
+        noteRequired:
+          type: boolean
+          title: note_required
+        requiresApproval:
+          type: boolean
+          title: requires_approval
+          description: Refused unless the record's current revision is approved.
+        entitlements:
+          type: array
+          items:
+            type: string
+          title: entitlements
+          description: Entitlements a workspace member needs, beyond write access.
+        createsKind:
+          type: string
+          title: creates_kind
+          description: Kind of the record this transition creates, if any.
+        notify:
+          type: string
+          title: notify
+          description: Event kind sent through the record notification owner, if any.
+      title: BusinessLifecycleTransition
+      additionalProperties: false
     deixicpublic.v1.BusinessMoney:
       type: object
       properties:
@@ -2448,6 +2664,12 @@ components:
         description:
           type: string
           title: description
+        facets:
+          title: facets
+          description: |-
+            Optional behaviour of this revision; unset keeps the default behaviour.
+             Immutable with the published revision.
+          $ref: '#/components/schemas/deixicpublic.v1.BusinessTypeFacets'
       title: BusinessObjectType
       additionalProperties: false
     deixicpublic.v1.BusinessObjectTypeField:
@@ -2508,6 +2730,18 @@ components:
           title: target_type_id
       title: BusinessObjectTypeRelationship
       additionalProperties: false
+    deixicpublic.v1.BusinessPermissionFacet:
+      type: object
+      properties:
+        readEntitlement:
+          type: string
+          title: read_entitlement
+        writeEntitlement:
+          type: string
+          title: write_entitlement
+      title: BusinessPermissionFacet
+      additionalProperties: false
+      description: Entitlement names a member needs to read or write records.
     deixicpublic.v1.BusinessSourceFieldMapping:
       type: object
       properties:
@@ -2529,6 +2763,29 @@ components:
           title: values
       title: BusinessTextList
       additionalProperties: false
+    deixicpublic.v1.BusinessTypeFacets:
+      type: object
+      properties:
+        lifecycle:
+          title: lifecycle
+          $ref: '#/components/schemas/deixicpublic.v1.BusinessLifecycleFacet'
+        graph:
+          title: graph
+          $ref: '#/components/schemas/deixicpublic.v1.BusinessGraphFacet'
+        index:
+          title: index
+          $ref: '#/components/schemas/deixicpublic.v1.BusinessIndexFacet'
+        display:
+          title: display
+          $ref: '#/components/schemas/deixicpublic.v1.BusinessDisplayFacet'
+        permissions:
+          title: permissions
+          $ref: '#/components/schemas/deixicpublic.v1.BusinessPermissionFacet'
+      title: BusinessTypeFacets
+      additionalProperties: false
+      description: |-
+        Behaviour facets of one published type revision, in the workflow-record
+         grammar. Every facet is optional.
     deixicpublic.v1.ClientMcpPolicy:
       type: object
       properties:
@@ -4677,6 +4934,62 @@ components:
           title: archived
       title: Thread
       additionalProperties: false
+    deixicpublic.v1.TransitionBusinessObjectRequest:
+      type: object
+      properties:
+        organizationId:
+          type: string
+          title: organization_id
+        workspaceId:
+          type: string
+          title: workspace_id
+        idempotencyKey:
+          type: string
+          title: idempotency_key
+        typeId:
+          type: string
+          title: type_id
+        objectId:
+          type: string
+          title: object_id
+        expectedRevision:
+          type:
+            - integer
+            - string
+          title: expected_revision
+          format: int64
+        transitionId:
+          type: string
+          title: transition_id
+        note:
+          type: string
+          title: note
+          description: A person's reason; required when the transition declares note_required.
+      title: TransitionBusinessObjectRequest
+      additionalProperties: false
+    deixicpublic.v1.TransitionBusinessObjectResponse:
+      type: object
+      properties:
+        objectId:
+          type: string
+          title: object_id
+        revision:
+          type:
+            - integer
+            - string
+          title: revision
+          format: int64
+          description: The record's revision after the transition.
+        state:
+          type: string
+          title: state
+          description: The state the record is now in.
+        createdObjectId:
+          type: string
+          title: created_object_id
+          description: The record the transition created, when it declares one.
+      title: TransitionBusinessObjectResponse
+      additionalProperties: false
     deixicpublic.v1.UpdateBusinessObjectRequest:
       type: object
       properties:
diff --git a/proto/deixicpublic/v1/sdk.proto b/proto/deixicpublic/v1/sdk.proto
index e19566a..f0c792e 100644
--- a/proto/deixicpublic/v1/sdk.proto
+++ b/proto/deixicpublic/v1/sdk.proto
@@ -39,6 +39,9 @@ service DeixicPublicService {
   // Creates the record whose declared unique field holds the given value, or
   // updates the one that already does, atomically on the server.
   rpc UpsertBusinessObject(UpsertBusinessObjectRequest) returns (UpsertBusinessObjectResponse);
+  // Moves a record of a type with a lifecycle facet through one declared
+  // transition at an exact revision.
+  rpc TransitionBusinessObject(TransitionBusinessObjectRequest) returns (TransitionBusinessObjectResponse);
   rpc ListBusinessBlueprints(ListBusinessBlueprintsRequest) returns (ListBusinessBlueprintsResponse);
   rpc BindBusinessObjectSource(BindBusinessObjectSourceRequest) returns (BindBusinessObjectSourceResponse);
   rpc ListBusinessObjectRelationships(ListBusinessObjectRelationshipsRequest) returns (ListBusinessObjectRelationshipsResponse);
@@ -537,6 +540,94 @@ message BusinessObjectType {
   repeated BusinessObjectTypeRelationship relationships = 7;
   string plural_name = 8;
   string description = 9;
+  // Optional behaviour of this revision; unset keeps the default behaviour.
+  // Immutable with the published revision.
+  BusinessTypeFacets facets = 10;
+}
+
+// Behaviour facets of one published type revision, in the workflow-record
+// grammar. Every facet is optional.
+message BusinessTypeFacets {
+  BusinessLifecycleFacet lifecycle = 1;
+  BusinessGraphFacet graph = 2;
+  BusinessIndexFacet index = 3;
+  BusinessDisplayFacet display = 4;
+  BusinessPermissionFacet permissions = 5;
+}
+
+// States, transitions, approval and due date.
+message BusinessLifecycleFacet {
+  repeated BusinessLifecycleState states = 1;
+  repeated BusinessLifecycleTransition transitions = 2;
+  BusinessLifecycleApproval approval = 3;
+  BusinessLifecycleDue due = 4;
+}
+message BusinessLifecycleState {
+  string state_id = 1;
+  string name = 2;
+  bool initial = 3;
+  bool terminal = 4;
+}
+message BusinessLifecycleTransition {
+  string transition_id = 1;
+  string name = 2;
+  repeated string from_states = 3;
+  string to_state = 4;
+  bool note_required = 5;
+  // Refused unless the record's current revision is approved.
+  bool requires_approval = 6;
+  // Entitlements a workspace member needs, beyond write access.
+  repeated string entitlements = 7;
+  // Kind of the record this transition creates, if any.
+  string creates_kind = 8;
+  // Event kind sent through the record notification owner, if any.
+  string notify = 9;
+}
+message BusinessLifecycleApproval {
+  string reviewer_entitlement = 1;
+  bool distinct_from_creator = 2;
+  string notify = 3;
+  // A declared state the approval also moves the record to.
+  string to_state = 4;
+}
+message BusinessLifecycleDue {
+  string field_id = 1;
+  string assignee_field_id = 2;
+  bool future = 3;
+  optional uint32 max_days_ahead = 4;
+}
+
+// How records project into the graph.
+message BusinessGraphFacet {
+  string thing_kind = 1;
+  repeated BusinessGraphRelation relations = 2;
+}
+
+// The relation one reference field draws.
+message BusinessGraphRelation {
+  string field_id = 1;
+  string relation = 2;
+  // The referenced record is the edge's source.
+  bool inbound = 3;
+}
+
+// Fields readers filter and sort by.
+message BusinessIndexFacet {
+  repeated string indexed_field_ids = 1;
+  repeated string sortable_field_ids = 2;
+}
+
+// Navigation and list presentation.
+message BusinessDisplayFacet {
+  string icon = 1;
+  string nav_section = 2;
+  repeated string list_field_ids = 3;
+}
+
+// Entitlement names a member needs to read or write records.
+message BusinessPermissionFacet {
+  string read_entitlement = 1;
+  string write_entitlement = 2;
 }
 message DefineBusinessObjectTypeRequest {
   string organization_id = 1;
@@ -570,6 +661,26 @@ message UpsertBusinessObjectRequest {
   string unique_field_id = 6;
   repeated BusinessFieldValue values = 7;
 }
+message TransitionBusinessObjectRequest {
+  string organization_id = 1;
+  string workspace_id = 2;
+  string idempotency_key = 3;
+  string type_id = 4;
+  string object_id = 5;
+  int64 expected_revision = 6;
+  string transition_id = 7;
+  // A person's reason; required when the transition declares note_required.
+  string note = 8;
+}
+message TransitionBusinessObjectResponse {
+  string object_id = 1;
+  // The record's revision after the transition.
+  int64 revision = 2;
+  // The state the record is now in.
+  string state = 3;
+  // The record the transition created, when it declares one.
+  string created_object_id = 4;
+}
 message UpsertBusinessObjectResponse {
   BusinessObject object = 1;
   // True when this call created the record, false when it updated one.