diff --git a/test/collections-fixture.ts b/test/collections-fixture.ts
new file mode 100644
index 0000000..921acda
--- /dev/null
+++ b/test/collections-fixture.ts
@@ -0,0 +1,23 @@
+import assert from "node:assert/strict";
+import { readFile } from "node:fs/promises";
+import { compileCapabilityResourceSource, compileCapabilitySource } from "../src/capability-language/parser.js";
+import { compileExecutionPlan } from "../src/execution-world/plan.js";
+import type { InterfaceRevision } from "../src/capability-model/types.js";
+export async function collectionsPlan() {
+  const read = (name: string) => readFile(`test/fixtures/collections/${name}.qx`, "utf8");
+  const source = { repository: "https://example.test/collections.git", commit: "a".repeat(40) };
+  const interfaces = new Map<string, InterfaceRevision>();
+  for (const name of ["NodeData"]) {
+    const result = compileCapabilityResourceSource(await read(name), { source, environment: { interfaces } });
+    assert.ok(result.ok && result.resource.kind === "interface", JSON.stringify(result.diagnostics));
+    interfaces.set(name, result.resource.revision);
+  }
+  const pkg = compileCapabilityResourceSource(await read("CollectionRuntime"), { source, environment: { interfaces } });
+  assert.ok(pkg.ok && pkg.resource.kind === "package", JSON.stringify(pkg.diagnostics));
+  const result = compileCapabilitySource(await read("workspace"), "workspace.qx", {
+    interfaces,
+    packages: new Map([["CollectionRuntime", pkg.resource.revision]]),
+  });
+  assert.ok(result.ok, JSON.stringify(result.diagnostics));
+  return compileExecutionPlan(result.workspace);
+}
diff --git a/test/emit-portable-reader.ts b/test/emit-portable-reader.ts
index 90a413f..dba500f 100644
--- a/test/emit-portable-reader.ts
+++ b/test/emit-portable-reader.ts
@@ -119,3 +119,9 @@ for (const [name, revision] of [
     `dist/portable-reader/async/${name}.ts`,
     generateRemoteTypeScriptBindings(asyncPlan.definition.bindingSchema, revision),
   );
+
+const { collectionsPlan } = await import("./collections-fixture.js");
+const collections = await collectionsPlan();
+await mkdir("dist/portable-reader/collections", { recursive: true });
+await writeFile("dist/portable-reader/collections/plan.json", JSON.stringify(collections));
+await writeFile("dist/portable-reader/collections/kernel.json", JSON.stringify(compileKernelProgram(collections)));
diff --git a/test/fixtures/collections/CollectionRuntime.qx b/test/fixtures/collections/CollectionRuntime.qx
new file mode 100644
index 0000000..160601b
--- /dev/null
+++ b/test/fixtures/collections/CollectionRuntime.qx
@@ -0,0 +1,18 @@
+type Replacement = record { expected: list<string>; targets: list<atom-ref<Node>>; };
+type Seed = record { label: string; };
+external atom Node id "collection:node";
+package CollectionRuntime id "collection:runtime" revision "collection:runtime@1" {
+  operation version id "collection:runtime:version" : unit -> list<string>
+  mode call execution snapshot targets [browser, server] receiver atom Node requires {
+    edge items id "collection:version:items" : many atom Node [resolve];
+  };
+  operation replace id "collection:runtime:replace" : Replacement -> unit
+  mode call execution transaction targets [browser, server] receiver atom Node requires {
+    edge items id "collection:replace:items" : many atom Node [resolve, connect, disconnect];
+  };
+  operation ensure id "collection:runtime:ensure" : unit -> atom-ref<Node>
+  mode call execution transaction targets [browser, server] receiver atom Node requires {
+    edge detail id "collection:ensure:detail" : optional-one atom Node [resolve, connect];
+    creation node id "collection:ensure:node" : Node input Seed;
+  };
+}
diff --git a/test/fixtures/collections/NodeData.qx b/test/fixtures/collections/NodeData.qx
new file mode 100644
index 0000000..21eb3ce
--- /dev/null
+++ b/test/fixtures/collections/NodeData.qx
@@ -0,0 +1,26 @@
+type Replacement = record { expected: list<string>; targets: list<atom-ref<Node>>; };
+external atom Node id "collection:node";
+interface NodeData id "collection:data" revision "collection:data@1" {
+  queryable portable value version id "collection:version" : list<string> {
+    get id "collection:version:get" execution snapshot targets [browser, server];
+  }
+  operation replace id "collection:replace" : Replacement -> unit {
+    call id "collection:replace:call" execution transaction targets [browser, server];
+  }
+  operation ensure id "collection:ensure" : unit -> atom-ref<Node> {
+    call id "collection:ensure:call" execution transaction targets [browser, server];
+  }
+  queryable value label id "collection:label" : string {
+    get id "collection:label:get" execution snapshot targets [browser, server];
+    set id "collection:label:set" execution transaction targets [browser, server];
+  }
+  queryable relation items id "collection:items" : many atom Node {
+    resolve id "collection:items:resolve" execution snapshot targets [browser, server];
+  }
+  queryable relation containers id "collection:containers" : many atom Node {
+    resolve id "collection:containers:resolve" execution snapshot targets [browser, server];
+  }
+  queryable relation detail id "collection:detail" : optional-one atom Node {
+    resolve id "collection:detail:resolve" execution snapshot targets [browser, server];
+  }
+}
diff --git a/test/fixtures/collections/workspace.qx b/test/fixtures/collections/workspace.qx
new file mode 100644
index 0000000..8a726d5
--- /dev/null
+++ b/test/fixtures/collections/workspace.qx
@@ -0,0 +1,28 @@
+workspace Collections id "workspace:collections" revision "workspace:collections@1" commit "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" {
+  import interface NodeData;
+  import package CollectionRuntime;
+  atom Node id "collection:node";
+  conform Node as NodeData id "collection:node:data" {
+    private state Label id "collection:label-slot" on Node : string policy register;
+    private edge Items id "collection:items-edge" {
+      atom Node projection items id "collection:items-projection" many;
+      atom Node projection containers id "collection:containers-projection" many;
+    }
+    private edge Detail id "collection:detail-edge" {
+      atom Node projection detail id "collection:detail-projection" optional-one;
+      atom Node projection owner id "collection:owner-projection" optional-one;
+    }
+    initialize { label to state Label; };
+    bind label.get to state Label.read;
+    bind label.set to state Label.write;
+    bind items.resolve to edge Items.items.resolve;
+    bind containers.resolve to edge Items.containers.resolve;
+    bind detail.resolve to edge Detail.detail.resolve;
+    bind version.get to package CollectionRuntime.version with { items to edge Items.items; };
+    bind replace.call to package CollectionRuntime.replace with { items to edge Items.items; };
+    bind ensure.call to package CollectionRuntime.ensure with {
+      detail to edge Detail.detail;
+      node to creation Node with { NodeData from input; };
+    };
+  }
+}