Get a memory layer by ID

memory_layers.retrieve(id, **kwargs) -> MemoryLayer { metadata, spec, info }

GET/v1/workspaces/{workspaceId}/memory_layers/{id}

Retrieves a memory layer by ID from the workspace

ParametersExpand Collapse

workspace_id: String

id: String

ReturnsExpand Collapse

class MemoryLayer { metadata, spec, info }

MemoryLayer is a named container of memory entries that can be composed into an objective’s memory stack. Layers are workspace-scoped resources. The layer type controls how its entries participate in the agent loop — see MemoryLayerType for details.

See “Memory stack composition” above for how layers compose at lookup time.

metadata: ResourceMetadata { id, account_id, created_at, 6 more }

Standard metadata for persistent, named resources (e.g., agents, tools, prompts)

id: String

Unique identifier for the resource (prefixed ULID, e.g., “agent_01HXK…”)

account_id: String

Account this resource belongs to for multi-tenant isolation (prefixed ULID)

created_at: Time

Timestamp when this resource was created

formatdate-time

Human-readable name for the resource (e.g., “Customer Support Agent”, “Email Tool”) Required for resources that users interact with directly

profile_id: String

ID of the actor (user or service account) that created this resource

workspace_id: String

Workspace this resource belongs to for organizational grouping (prefixed ULID)

bundle_key: String

Optional bundle ownership key. When set, indicates the resource is managed by a configuration bundle identified by this key. Used by BulkWorkspaceResources.Apply to track which resources belong to which bundle for reconciliation / soft-delete on re-apply.

external_id: String

External ID for the resource (e.g., a workflow ID from an external system)

labels: Hash[Symbol, String]

Arbitrary key-value pairs for categorization and filtering Examples: {“environment”: “production”, “team”: “platform”, “version”: “v2”}

spec: MemoryLayerSpec { type, description, expires_at, system_managed }

type: :MEMORY_LAYER_TYPE_UNSPECIFIED | :MEMORY_LAYER_TYPE_EPISODIC | :MEMORY_LAYER_TYPE_SKILLS

formatenum

One of the following:

:MEMORY_LAYER_TYPE_UNSPECIFIED

:MEMORY_LAYER_TYPE_EPISODIC

:MEMORY_LAYER_TYPE_SKILLS

description: String

Human-readable description of the layer’s purpose. Encouraged for user-created layers; system-managed layers may have a generated description.

expires_at: Time

For layers with a finite lifetime (e.g., episodic), the time at which the layer becomes eligible for cleanup. Set by the system; unset for persistent layers.

formatdate-time

system_managed: bool

Server-set. True for layers managed by the system (e.g., episodic layers created automatically when an objective uses an episodic_key). System-managed layers cannot be assigned to objective stacks via the API and cannot be mutated by clients — their lifecycle is controlled entirely by the runtime.

info: MemoryLayerInfo { created_by, entry_count, last_used_at }

created_by: Profile { metadata, spec }

A profile identifies a user or non-human principal (such as an API key) at the account level. Profiles are account-scoped and can be granted access to multiple workspaces.

metadata: AccountResourceMetadata { id, account_id, name, 3 more }

AccountResourceMetadata is used to represent a resource that is associated to an account but not to a workspace.

id: String

Unique identifier for the resource (prefixed ULID, e.g., “apikey_01HXK…”)

account_id: String

Account this resource belongs to for multi-tenant isolation (prefixed ULID)

Human-readable name for the resource (e.g., “Customer Support Agent”, “Email Tool”) Required for resources that users interact with directly

profile_id: String

external_id: String

External ID for the resource (e.g., a workflow ID from an external system)

labels: Hash[Symbol, String]

Arbitrary key-value pairs for categorization and filtering Examples: {“environment”: “production”, “team”: “platform”, “version”: “v2”}

spec: ProfileSpec { type, email, name }

Configuration for a profile.

type: :PROFILE_TYPE_UNSPECIFIED | :PROFILE_TYPE_USER | :PROFILE_TYPE_API_KEY | :PROFILE_TYPE_SYSTEM

Whether this profile represents a human user, an API key, or a system principal.

formatenum

One of the following:

:PROFILE_TYPE_UNSPECIFIED

:PROFILE_TYPE_USER

:PROFILE_TYPE_API_KEY

:PROFILE_TYPE_SYSTEM

email: String

Email address of the profile. Required and unique within an account for user profiles.

Display name (e.g., “Bobby Tables”).

entry_count: Integer

Number of entries currently in this layer.

formatint32

last_used_at: Time

Timestamp of the most recent objective that resolved against this layer. Useful for surfacing unused layers in the dashboard.

formatdate-time

Get a memory layer by ID

require "cadenya"

cadenya = Cadenya::Client.new(api_key: "My API Key")

memory_layer = cadenya.memory_layers.retrieve("id", workspace_id: "workspaceId")

puts(memory_layer)

{
  "metadata": {
    "id": "id",
    "accountId": "accountId",
    "createdAt": "2019-12-27T18:11:19.117Z",
    "name": "name",
    "profileId": "profileId",
    "workspaceId": "workspaceId",
    "bundleKey": "bundleKey",
    "externalId": "externalId",
    "labels": {
      "foo": "string"
    }
  },
  "spec": {
    "type": "MEMORY_LAYER_TYPE_UNSPECIFIED",
    "description": "description",
    "expiresAt": "2019-12-27T18:11:19.117Z",
    "systemManaged": true
  },
  "info": {
    "createdBy": {
      "metadata": {
        "id": "id",
        "accountId": "accountId",
        "name": "name",
        "profileId": "profileId",
        "externalId": "externalId",
        "labels": {
          "foo": "string"
        }
      },
      "spec": {
        "type": "PROFILE_TYPE_UNSPECIFIED",
        "email": "email",
        "name": "name"
      }
    },
    "entryCount": 0,
    "lastUsedAt": "2019-12-27T18:11:19.117Z"
  }
}

Returns Examples

{
  "metadata": {
    "id": "id",
    "accountId": "accountId",
    "createdAt": "2019-12-27T18:11:19.117Z",
    "name": "name",
    "profileId": "profileId",
    "workspaceId": "workspaceId",
    "bundleKey": "bundleKey",
    "externalId": "externalId",
    "labels": {
      "foo": "string"
    }
  },
  "spec": {
    "type": "MEMORY_LAYER_TYPE_UNSPECIFIED",
    "description": "description",
    "expiresAt": "2019-12-27T18:11:19.117Z",
    "systemManaged": true
  },
  "info": {
    "createdBy": {
      "metadata": {
        "id": "id",
        "accountId": "accountId",
        "name": "name",
        "profileId": "profileId",
        "externalId": "externalId",
        "labels": {
          "foo": "string"
        }
      },
      "spec": {
        "type": "PROFILE_TYPE_UNSPECIFIED",
        "email": "email",
        "name": "name"
      }
    },
    "entryCount": 0,
    "lastUsedAt": "2019-12-27T18:11:19.117Z"
  }
}