diff --git a/test/emit-portable-reader.ts b/test/emit-portable-reader.ts
index c3dff3b..90a413f 100644
--- a/test/emit-portable-reader.ts
+++ b/test/emit-portable-reader.ts
@@ -89,6 +89,11 @@ void negative;
 );
 
 const { asyncObjectPlan } = await import("./async-fixture.js");
+const { treePlan } = await import("./tree-fixture.js");
+const tree = await treePlan();
+await mkdir("dist/portable-reader/tree", { recursive: true });
+await writeFile("dist/portable-reader/tree/plan.json", JSON.stringify(tree));
+await writeFile("dist/portable-reader/tree/kernel.json", JSON.stringify(compileKernelProgram(tree)));
 const { compile: compileAcceptance } = await import("./acceptance-fixture.js");
 const acceptance = compileAcceptance();
 if (!acceptance.ok) throw Error(JSON.stringify(acceptance.diagnostics));
diff --git a/test/fixtures/tree/TreeData.qx b/test/fixtures/tree/TreeData.qx
new file mode 100644
index 0000000..701ad50
--- /dev/null
+++ b/test/fixtures/tree/TreeData.qx
@@ -0,0 +1,11 @@
+interface TreeData id "tree:data" revision "tree:data@1" {
+  operation reparent id "tree:reparent" : optional<interface-ref<TreeData>> -> unit {
+    call id "tree:reparent:call" execution transaction targets [browser, server];
+  }
+  queryable relation parent id "tree:parent" : optional-one interface TreeData {
+    resolve id "tree:parent:resolve" execution snapshot targets [browser, server];
+  }
+  queryable relation children id "tree:children" : many interface TreeData {
+    resolve id "tree:children:resolve" execution snapshot targets [browser, server];
+  }
+}
diff --git a/test/fixtures/tree/TreeRuntime.qx b/test/fixtures/tree/TreeRuntime.qx
new file mode 100644
index 0000000..0e2a489
--- /dev/null
+++ b/test/fixtures/tree/TreeRuntime.qx
@@ -0,0 +1,13 @@
+external atom Node id "tree:node";
+import interface TreeData;
+package TreeRuntime id "tree:runtime" revision "tree:runtime@1" {
+  operation reparent id "tree:runtime:reparent" : optional<interface-ref<TreeData>> -> unit
+  mode call execution transaction targets [browser, server] receiver atom Node requires {
+    edge parent id "tree:move:parent" : optional-one interface TreeData [resolve, connect, disconnect];
+  } accept using check;
+  operation check id "tree:runtime:check" : optional<interface-ref<TreeData>> -> unit
+  mode call execution snapshot targets [server] receiver atom Node requires {
+    edge current id "tree:check:current" : optional-one interface TreeData [resolve];
+    interface ancestors id "tree:check:ancestors" : TreeData using [parent.resolve] from input;
+  };
+}
diff --git a/test/fixtures/tree/workspace.qx b/test/fixtures/tree/workspace.qx
new file mode 100644
index 0000000..f7c41b9
--- /dev/null
+++ b/test/fixtures/tree/workspace.qx
@@ -0,0 +1,19 @@
+workspace Tree id "workspace:tree" revision "workspace:tree@1" commit "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" {
+  import interface TreeData;
+  import package TreeRuntime;
+  atom Node id "tree:node";
+  conform Node as TreeData id "tree:node:data" {
+    private edge Parent id "tree:parent-edge" {
+      atom Node projection parent id "tree:parent-projection" optional-one;
+      interface TreeData projection children id "tree:children-projection" many;
+    }
+    bind parent.resolve to edge Parent.parent.resolve;
+    bind children.resolve to edge Parent.children.resolve;
+    bind reparent.call to package TreeRuntime.reparent with {
+      parent to edge Parent.parent;
+    } accept with {
+      current to edge Parent.parent;
+      ancestors to interface TreeData from input;
+    };
+  }
+}
diff --git a/test/tree-fixture.ts b/test/tree-fixture.ts
new file mode 100644
index 0000000..11d30c4
--- /dev/null
+++ b/test/tree-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 treePlan() {
+  const read = (name: string) => readFile(`test/fixtures/tree/${name}.qx`, "utf8");
+  const source = { repository: "https://example.test/tree.git", commit: "a".repeat(40) };
+  const interfaces = new Map<string, InterfaceRevision>();
+  for (const name of ["TreeData"]) {
+    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("TreeRuntime"), { 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([["TreeRuntime", pkg.resource.revision]]),
+  });
+  assert.ok(result.ok, JSON.stringify(result.diagnostics));
+  return compileExecutionPlan(result.workspace);
+}