diff --git a/packages/framework/fluid-static/src/types.ts b/packages/framework/fluid-static/src/types.ts
index bbb525137846..573009c9a9bf 100644
--- a/packages/framework/fluid-static/src/types.ts
+++ b/packages/framework/fluid-static/src/types.ts
@@ -121,7 +121,7 @@ interface IProvideStaticEntryPoint {
 }
 
 /**
- * @internal
+ * This is the internal entry point fluid-static creates.
  */
 export interface IStaticEntryPoint extends IProvideStaticEntryPoint {
 	readonly rootDataObject: IRootDataObject;
diff --git a/packages/framework/presence/src/broadcastControls.ts b/packages/framework/presence/src/broadcastControls.ts
index 5caf41681b39..b90f0afbd698 100644
--- a/packages/framework/presence/src/broadcastControls.ts
+++ b/packages/framework/presence/src/broadcastControls.ts
@@ -89,7 +89,8 @@ class ForcedRefreshControl
 }
 
 /**
- * @internal
+ * Implements {@link BroadcastControls} for States Managers
+ * where returning `undefined` settings are allowed.
  */
 export class OptionalBroadcastControl
 	extends ForcedRefreshControl
@@ -109,8 +110,6 @@ export class OptionalBroadcastControl
  *
  * If {@link BroadcastControls.allowableUpdateLatencyMs | allowableUpdateLatencyMs}
  * is set to `undefined`, the default will be restored.
- *
- * @internal
  */
 export class RequiredBroadcastControl
 	extends ForcedRefreshControl
diff --git a/packages/framework/presence/src/datastoreSupport.ts b/packages/framework/presence/src/datastoreSupport.ts
index 925d23d867fe..06eed1a90fbb 100644
--- a/packages/framework/presence/src/datastoreSupport.ts
+++ b/packages/framework/presence/src/datastoreSupport.ts
@@ -3,6 +3,11 @@
  * Licensed under the MIT License.
  */
 
+/**
+ * This module provided collection of minimal (slim) helpers to support
+ * DataObject creation for temporary {@link ExperimentalPresenceManager}.
+ */
+
 import type {
 	FluidObject,
 	IFluidLoadable,
@@ -19,8 +24,9 @@ import type {
 import { create404Response } from "@fluidframework/runtime-utils/internal";
 
 /**
- * Extends the FluidDataStoreRuntime to provide a request method that routes requests to
- * the entrypoint Fluid object that is expected to be a {@link LoadableFluidObject}.
+ * `BasicFluidDataStoreRuntime` extends the FluidDataStoreRuntime to provide a request
+ * method that routes requests to the entrypoint Fluid object that is expected to be a
+ * {@link LoadableFluidObject}.
  */
 class BasicFluidDataStoreRuntime extends FluidDataStoreRuntime {
 	public override async request(request: IRequest): Promise<IResponse> {
@@ -47,7 +53,7 @@ class BasicFluidDataStoreRuntime extends FluidDataStoreRuntime {
 }
 
 /**
- * @internal
+ * `BasicDataStoreFactory` is the factory for creating a {@link BasicFluidDataStoreRuntime}.
  */
 export class BasicDataStoreFactory<Type extends string> implements IFluidDataStoreFactory {
 	public get IFluidDataStoreFactory(): IFluidDataStoreFactory {
@@ -82,7 +88,8 @@ export class BasicDataStoreFactory<Type extends string> implements IFluidDataSto
 }
 
 /**
- * @internal
+ * `LoadableFluidObject` is helper to build a DataObject handling the {@link FluidObject}
+ * and {@link IFluidLoadable} requirements.
  */
 export abstract class LoadableFluidObject implements FluidObject, IFluidLoadable {
 	public constructor(protected readonly runtime: FluidDataStoreRuntime) {}
diff --git a/packages/framework/presence/src/internalTypes.ts b/packages/framework/presence/src/internalTypes.ts
index 1aabba9d66b1..9ef052ab1c96 100644
--- a/packages/framework/presence/src/internalTypes.ts
+++ b/packages/framework/presence/src/internalTypes.ts
@@ -15,19 +15,20 @@ import type {
 
 /**
  * Presence {@link ContainerExtension} version of {@link @fluidframework/container-runtime-definitions#ExtensionRuntimeProperties}
- * @internal
  */
 export interface ExtensionRuntimeProperties {
 	SignalMessages: SignalMessages;
 }
 /**
  * Presence specific ExtensionHost
- * @internal
  */
 export type ExtensionHost = ContainerExtensionHost<ExtensionRuntimeProperties>;
 
 /**
- * @internal
+ * Basic structure of set of {@link Attendee} records within Presence datastore
+ *
+ * @remarks
+ * This is commonly exists per named state in State Managers.
  */
 export interface ClientRecord<TValue extends InternalTypes.ValueDirectoryOrState<unknown>> {
 	// Caution: any particular item may or may not exist
@@ -42,8 +43,6 @@ export interface ClientRecord<TValue extends InternalTypes.ValueDirectoryOrState
  *
  * @privateRemarks
  * Replace with non-DataStore based interface.
- *
- * @internal
  */
 export type IEphemeralRuntime = Omit<ExtensionHost, "logger" | "submitAddressedSignal"> &
 	// Apart from tests, there is always a logger. So this could be promoted to required.
@@ -60,7 +59,10 @@ export type IEphemeralRuntime = Omit<ExtensionHost, "logger" | "submitAddressedS
 	};
 
 /**
- * @internal
+ * Contract for State Managers as used by a States Workspace (`PresenceStatesImpl`)
+ *
+ * @remarks
+ * See uses of `unbrandIVM`.
  */
 export interface ValueManager<
 	TValue,
@@ -73,6 +75,6 @@ export interface ValueManager<
 }
 
 /**
- * @internal
+ * A function to be called at the end of an update frame
  */
 export type PostUpdateAction = () => void;
diff --git a/packages/framework/presence/src/internalUtils.ts b/packages/framework/presence/src/internalUtils.ts
index 8a078191adb0..eb741cbe8e46 100644
--- a/packages/framework/presence/src/internalUtils.ts
+++ b/packages/framework/presence/src/internalUtils.ts
@@ -29,8 +29,6 @@ type RequiredAndNotUndefined<T> = {
  * The is a defect in this utility when a string index appears in the object.
  * In such a case, the only result is `[string, T]`, where `T` is the type
  * of the string index entry.
- *
- * @internal
  */
 export const objectEntries = Object.entries as <const T>(o: T) => KeyValuePairs<T>;
 
@@ -41,8 +39,6 @@ export const objectEntries = Object.entries as <const T>(o: T) => KeyValuePairs<
  * Given `T` should not contain `undefined` values. If it does, use
  * {@link objectEntries} instead. Without `undefined` values, this
  * typing provides best handling of objects with optional properties.
- *
- * @internal
  */
 export const objectEntriesWithoutUndefined = Object.entries as <const T>(
 	o: T,
@@ -50,8 +46,6 @@ export const objectEntriesWithoutUndefined = Object.entries as <const T>(
 
 /**
  * Object.keys retyped to preserve known keys and their types.
- *
- * @internal
  */
 export const objectKeys = Object.keys as <const T>(
 	o: T,
diff --git a/packages/framework/presence/src/presence.ts b/packages/framework/presence/src/presence.ts
index 5e4d6d74c9c1..408aa040dc2e 100644
--- a/packages/framework/presence/src/presence.ts
+++ b/packages/framework/presence/src/presence.ts
@@ -109,8 +109,6 @@ export interface Attendee<SpecificAttendeeId extends AttendeeId = AttendeeId> {
 /**
  * Utility type limiting to a specific attendee. (A attendee with
  * a specific session ID - not just any session ID.)
- *
- * @internal
  */
 export type SpecificAttendee<SpecificAttendeeId extends AttendeeId> =
 	string extends SpecificAttendeeId ? never : Attendee<SpecificAttendeeId>;
diff --git a/packages/framework/presence/src/presenceDatastoreManager.ts b/packages/framework/presence/src/presenceDatastoreManager.ts
index 267ba36236ea..2ec38b9e2642 100644
--- a/packages/framework/presence/src/presenceDatastoreManager.ts
+++ b/packages/framework/presence/src/presenceDatastoreManager.ts
@@ -72,7 +72,7 @@ function isPresenceMessage(
 }
 
 /**
- * @internal
+ * High-level contract for manager of singleton Presence datastore
  */
 export interface PresenceDatastoreManager {
 	joinSession(clientId: ClientConnectionId): void;
diff --git a/packages/framework/presence/src/presenceManager.ts b/packages/framework/presence/src/presenceManager.ts
index b2e1711fec66..97307b26e5ab 100644
--- a/packages/framework/presence/src/presenceManager.ts
+++ b/packages/framework/presence/src/presenceManager.ts
@@ -40,8 +40,6 @@ import type {
 
 /**
  * Portion of the container extension requirements ({@link ContainerExtension}) that are delegated to presence manager.
- *
- * @internal
  */
 export type PresenceExtensionInterface = Required<
 	Pick<ContainerExtension<ExtensionRuntimeProperties>, "processSignal">
@@ -184,8 +182,6 @@ function setupSubComponents(
 
 /**
  * Instantiates Presence Manager
- *
- * @internal
  */
 export function createPresenceManager(
 	runtime: IEphemeralRuntime,
diff --git a/packages/framework/presence/src/presenceStates.ts b/packages/framework/presence/src/presenceStates.ts
index f63ba400fd9c..f5326d38721e 100644
--- a/packages/framework/presence/src/presenceStates.ts
+++ b/packages/framework/presence/src/presenceStates.ts
@@ -26,8 +26,6 @@ import { unbrandIVM } from "./valueManager.js";
  * If the `Part` is an optional property, undefined will be included in the
  * result. Applying `Required` to the return type prior to extracting `Part`
  * does not work as expected. Use Exclude\<, undefined\> can be used as needed.
- *
- * @internal
  */
 export type MapSchemaElement<
 	TSchema extends StatesWorkspaceSchema,
@@ -36,9 +34,13 @@ export type MapSchemaElement<
 > = ReturnType<TSchema[Keys]>[Part];
 
 /**
- * @internal
+ * Miscellaneous options for local state updates
  */
 export interface RuntimeLocalUpdateOptions {
+	/**
+	 * The maximum time in milliseconds that this update is allowed to be
+	 * delayed before it must be sent to the service.
+	 */
 	allowableUpdateLatencyMs: number;
 
 	/**
@@ -48,7 +50,7 @@ export interface RuntimeLocalUpdateOptions {
 }
 
 /**
- * @internal
+ * Contract for `PresenceDatastoreManager` as required by States Workspaces ({@link PresenceStatesImpl}).
  */
 export interface PresenceRuntime {
 	readonly presence: Presence;
@@ -79,8 +81,6 @@ type MapEntries<TSchema extends StatesWorkspaceSchema> = PresenceSubSchemaFromWo
  *
  * This generic aspect makes some typing difficult. The loose typing is not broadcast to the
  * consumers that are expected to maintain their schema over multiple versions of clients.
- *
- * @internal
  */
 export interface ValueElementMap<_TSchema extends StatesWorkspaceSchema> {
 	[key: string]: ClientRecord<InternalTypes.ValueDirectoryOrState<unknown>>;
@@ -108,7 +108,7 @@ export interface ValueElementMap<_TSchema extends StatesWorkspaceSchema> {
 // }
 
 /**
- * @internal
+ * Data content of a datastore entry in update messages
  */
 export type ClientUpdateEntry = InternalTypes.ValueDirectoryOrState<unknown> & {
 	ignoreUnmonitored?: true;
@@ -121,7 +121,7 @@ interface ValueUpdateRecord {
 }
 
 /**
- * @internal
+ * Contract for Workspaces as required by `PresenceDatastoreManager`
  */
 export interface PresenceStatesInternal {
 	ensureContent<TSchemaAdditional extends StatesWorkspaceSchema>(
@@ -149,8 +149,6 @@ function isValueDirectory<
 
 /**
  * Merge a value directory.
- *
- * @internal
  */
 export function mergeValueDirectory<
 	T,
@@ -203,8 +201,6 @@ export function mergeValueDirectory<
  * @remarks
  * In the case of ignored unmonitored data, the client entries are not stored,
  * though the value keys will be populated and often remain empty.
- *
- * @internal
  */
 export function mergeUntrackedDatastore(
 	key: string,
diff --git a/packages/framework/presence/src/protocol.ts b/packages/framework/presence/src/protocol.ts
index d4259a223513..1eec56252b31 100644
--- a/packages/framework/presence/src/protocol.ts
+++ b/packages/framework/presence/src/protocol.ts
@@ -14,14 +14,14 @@ import type { ClientUpdateEntry } from "./presenceStates.js";
 import type { SystemWorkspaceDatastore } from "./systemWorkspace.js";
 
 /**
- * @internal
+ * Datastore that contains system workspace data
  */
 export interface SystemDatastore {
 	"system:presence": SystemWorkspaceDatastore;
 }
 
 /**
- * @internal
+ * General datastore (and message) structure.
  */
 export interface GeneralDatastoreMessageContent {
 	[WorkspaceAddress: string]: {
@@ -34,7 +34,7 @@ export interface GeneralDatastoreMessageContent {
 type DatastoreMessageContent = GeneralDatastoreMessageContent & SystemDatastore;
 
 /**
- * @internal
+ * Datastore update message type.
  */
 export const datastoreUpdateMessageType = "Pres:DatastoreUpdate";
 interface DatastoreUpdateMessage {
@@ -48,18 +48,18 @@ interface DatastoreUpdateMessage {
 }
 
 /**
- * @internal
+ * Outbound datastore update message
  */
 export type OutboundDatastoreUpdateMessage = OutboundExtensionMessage<DatastoreUpdateMessage>;
 
 /**
- * @internal
+ * Inbound and verified datastore update message
  */
 export type InboundDatastoreUpdateMessage =
 	VerifiedInboundExtensionMessage<DatastoreUpdateMessage>;
 
 /**
- * @internal
+ * Client join message type.
  */
 export const joinMessageType = "Pres:ClientJoin";
 interface ClientJoinMessage {
@@ -73,16 +73,16 @@ interface ClientJoinMessage {
 }
 
 /**
- * @internal
+ * Outbound client join message
  */
 export type OutboundClientJoinMessage = OutboundExtensionMessage<ClientJoinMessage>;
 
 /**
- * @internal
+ * Inbound and verified client join message
  */
 export type InboundClientJoinMessage = VerifiedInboundExtensionMessage<ClientJoinMessage>;
 
 /**
- * @internal
+ * Messages structures that can be sent and received as understood in the presence protocol
  */
 export type SignalMessages = ClientJoinMessage | DatastoreUpdateMessage;
diff --git a/packages/framework/presence/src/stateDatastore.ts b/packages/framework/presence/src/stateDatastore.ts
index ef04e585d480..b60d48b47fcc 100644
--- a/packages/framework/presence/src/stateDatastore.ts
+++ b/packages/framework/presence/src/stateDatastore.ts
@@ -12,9 +12,6 @@ import type { AttendeeId, PresenceWithNotifications as Presence } from "./presen
 // 	TValue extends InternalTypes.ValueDirectoryOrState<any> = InternalTypes.ValueDirectoryOrState<unknown>,
 // > = TValue extends InternalTypes.ValueDirectoryOrState<infer T> ? InternalTypes.ValueDirectoryOrState<T> : never;
 
-// /**
-//  * @internal
-//  */
 // export interface StateDatastoreSchema {
 // 	// This type is not precise. It may
 // 	// need to be replaced with StatesWorkspace schema pattern
@@ -24,9 +21,14 @@ import type { AttendeeId, PresenceWithNotifications as Presence } from "./presen
 // }
 
 /**
- * @internal
+ * Miscellaneous options for local state updates
  */
 export interface LocalStateUpdateOptions {
+	/**
+	 * When defined, this is the maximum time in milliseconds that this
+	 * update is allowed to be delayed before it must be sent to service.
+	 * When `undefined`, the callee may determine maximum delay.
+	 */
 	allowableUpdateLatencyMs: number | undefined;
 
 	/**
@@ -36,7 +38,8 @@ export interface LocalStateUpdateOptions {
 }
 
 /**
- * @internal
+ * Contract for States Workspace to support State Manager access to
+ * datastore and general internal presence knowledge.
  */
 export interface StateDatastore<
 	TKey extends string,
@@ -59,8 +62,6 @@ export interface StateDatastore<
 
 /**
  * Helper to get a handle from a datastore.
- *
- * @internal
  */
 export function handleFromDatastore<
 	// Constraining TSchema would be great, but it seems nested types (at least with undefined) cause trouble.
@@ -79,8 +80,6 @@ export function handleFromDatastore<
 
 /**
  * Helper to get the datastore back from its handle.
- *
- * @internal
  */
 export function datastoreFromHandle<
 	TKey extends string,
diff --git a/packages/framework/presence/src/systemWorkspace.ts b/packages/framework/presence/src/systemWorkspace.ts
index b4675e4221fe..342de7818f5e 100644
--- a/packages/framework/presence/src/systemWorkspace.ts
+++ b/packages/framework/presence/src/systemWorkspace.ts
@@ -18,8 +18,6 @@ import type { AnyWorkspace, StatesWorkspaceSchema } from "./types.js";
 
 /**
  * The system workspace's datastore structure.
- *
- * @internal
  */
 export interface SystemWorkspaceDatastore {
 	clientToSessionId: {
@@ -62,7 +60,7 @@ class SessionClient implements Attendee {
 }
 
 /**
- * @internal
+ * Internal workspace that manages metadata for session attendees.
  */
 export interface SystemWorkspace
 	// Portion of Presence that is handled by SystemWorkspace along with
@@ -287,8 +285,6 @@ class SystemWorkspaceImpl implements PresenceStatesInternal, SystemWorkspace {
 
 /**
  * Instantiates the system workspace.
- *
- * @internal
  */
 export function createSystemWorkspace(
 	attendeeId: AttendeeId,
diff --git a/packages/framework/presence/src/types.ts b/packages/framework/presence/src/types.ts
index 5a3d64120be3..db30f301260b 100644
--- a/packages/framework/presence/src/types.ts
+++ b/packages/framework/presence/src/types.ts
@@ -181,8 +181,6 @@ export interface NotificationsWorkspace<TSchema extends NotificationsWorkspaceSc
 
 /**
  * `AnyWorkspace` is a superset of {@link StatesWorkspace} and {@link NotificationsWorkspace}.
- *
- * @internal
  */
 export interface AnyWorkspace<
 	TSchema extends StatesWorkspaceSchema,
diff --git a/packages/framework/presence/src/valueManager.ts b/packages/framework/presence/src/valueManager.ts
index 6225fc4de858..c6909a522138 100644
--- a/packages/framework/presence/src/valueManager.ts
+++ b/packages/framework/presence/src/valueManager.ts
@@ -8,8 +8,6 @@ import type { ValueManager } from "./internalTypes.js";
 
 /**
  * Given a value manager, return opaque InternalTypes.StateValue.
- *
- * @internal
  */
 export function brandIVM<
 	TManagerInterface,
@@ -23,8 +21,6 @@ export function brandIVM<
 
 /**
  * Extract the value manager from an opaque InternalTypes.StateValue.
- *
- * @internal
  */
 export function unbrandIVM<
 	TManagerInterface,
diff --git a/packages/runtime/container-runtime-definitions/src/containerExtension.ts b/packages/runtime/container-runtime-definitions/src/containerExtension.ts
index 28f40e031937..37f55e18384d 100644
--- a/packages/runtime/container-runtime-definitions/src/containerExtension.ts
+++ b/packages/runtime/container-runtime-definitions/src/containerExtension.ts
@@ -62,11 +62,24 @@ export type OutboundExtensionMessage<TMessage extends TypedMessage = TypedMessag
 /**
  * Brand for value that has not been verified.
  *
+ * @remarks
  * Usage:
  *
- * - Cast to with `as unknown as UnverifiedBrand<T>` when value of or containing expected type `T` is yet unknown.
+ * - Cast any value to `UnverifiedBrand` using `as unknown as UnverifiedBrand<T>`
+ * when it is not yet confirmed that value is of type `T`.
+ *
+ * - When `T` value is needed, use narrowing type guards to check (preferred)
+ * or cast from `UnverifiedBrand` using `as unknown` when "instance" must
+ * be parsed to `T`.
  *
- * - Cast from with `as unknown` when "instance" will be parsed to `T`.
+ * @example Example narrowing type guard:
+ * ```typescript
+ * function validateFoo(
+ *   unverified: Foo | (Record<string, unknown> & UnverifiedBrand<Foo>)
+ * ): unverified is Foo {
+ *   return unverified.IFooProvider === unverified;
+ * }
+ * ```
  *
  * @sealed
  * @internal
@@ -136,6 +149,12 @@ export type InboundExtensionMessage<TMessage extends TypedMessage = TypedMessage
 	| VerifiedInboundExtensionMessage<TMessage>;
 
 /**
+ * Runtime properties of an extension.
+ *
+ * @remarks
+ * This is used to coordinate select types that are known only to the extension, but
+ * that host will respect where it calls back or provides extension specific data.
+ *
  * @internal
  */
 export interface ExtensionRuntimeProperties {