diff --git a/packages/memory/interface.ts b/packages/memory/interface.ts
index a2c0554a5..bbac90ac7 100644
--- a/packages/memory/interface.ts
+++ b/packages/memory/interface.ts
@@ -1,8 +1,17 @@
 import type { Reference } from "merkle-reference";
-import { JSONValue, SchemaContext } from "@commontools/runner";
-import { SchemaPathSelector } from "@commontools/runner/traverse";
+import type { JSONSchema, JSONValue } from "@commontools/api";
 
-export type { JSONValue, Reference, SchemaContext, SchemaPathSelector };
+export type SchemaContext = {
+  schema: JSONSchema;
+  rootSchema: JSONSchema;
+};
+
+export type SchemaPathSelector = {
+  path: readonly string[];
+  schemaContext?: Readonly<SchemaContext>;
+};
+
+export type { JSONValue, Reference };
 
 export interface Clock {
   now(): UTCUnixTimestampInSeconds;
diff --git a/packages/runner/src/builder/types.ts b/packages/runner/src/builder/types.ts
index 646c93b5b..feb34cba4 100644
--- a/packages/runner/src/builder/types.ts
+++ b/packages/runner/src/builder/types.ts
@@ -1,5 +1,6 @@
 import { isObject, type Mutable } from "@commontools/utils/types";
 import { toOpaqueRef } from "../back-to-cell.ts";
+import type { SchemaContext } from "@commontools/memory/interface";
 
 import type {
   ByRefFunction,
@@ -158,11 +159,7 @@ export type NodeRef = {
   frame: Frame | undefined;
 };
 
-// This is a schema, together with its rootSchema for resolving $ref entries
-export type SchemaContext = {
-  schema: JSONSchema;
-  rootSchema: JSONSchema;
-};
+export type { SchemaContext };
 
 export type StreamValue = {
   $stream: true;
diff --git a/packages/runner/src/traverse.ts b/packages/runner/src/traverse.ts
index e7f36ba57..b7157f016 100644
--- a/packages/runner/src/traverse.ts
+++ b/packages/runner/src/traverse.ts
@@ -11,12 +11,11 @@ import {
 } from "../../utils/src/types.ts";
 import { getLogger } from "../../utils/src/logger.ts";
 import { ContextualFlowControl } from "./cfc.ts";
+import type { JSONObject, JSONSchema, JSONValue } from "./builder/types.ts";
 import type {
-  JSONObject,
-  JSONSchema,
-  JSONValue,
   SchemaContext,
-} from "./builder/types.ts";
+  SchemaPathSelector,
+} from "@commontools/memory/interface";
 import { deepEqual } from "./path-utils.ts";
 import { isAnyCellLink, parseLink } from "./link-utils.ts";
 import { fromURI } from "./uri-utils.ts";
@@ -25,12 +24,7 @@ import type { IAttestation, IMemoryAddress } from "./storage/interface.ts";
 const logger = getLogger("traverse", { enabled: true, level: "warn" });
 
 export type { IAttestation, IMemoryAddress } from "./storage/interface.ts";
-
-// Both path and schemaContext are relative to the fact.is.value
-export type SchemaPathSelector = {
-  path: readonly string[];
-  schemaContext?: Readonly<SchemaContext>;
-};
+export type { SchemaPathSelector };
 
 /**
  * A data structure that maps keys to sets of values, allowing multiple values