diff --git a/tests/composition/javascript-applications/electronApplicationAnalysis.test.ts b/tests/boundary/filesystem/javascript-applications/electronApplicationAnalysis.test.ts
similarity index 95%
rename from tests/composition/javascript-applications/electronApplicationAnalysis.test.ts
rename to tests/boundary/filesystem/javascript-applications/electronApplicationAnalysis.test.ts
index 90d7e2504a..795075c99d 100644
--- a/tests/composition/javascript-applications/electronApplicationAnalysis.test.ts
+++ b/tests/boundary/filesystem/javascript-applications/electronApplicationAnalysis.test.ts
@@ -3,14 +3,14 @@ import { join } from "node:path";
 
 import { describe, expect, it } from "vitest";
 
-import { createTestTempDirectory } from "../../fixtures/temporaryDirectory.js";
+import { createTestTempDirectory } from "../../../fixtures/temporaryDirectory.js";
 
-import { analyzeJavaScriptApplication } from "../../support/javascriptApplicationScope.js";
-import { reconstructJavaScriptArtifact } from "../../support/javascriptApplicationScope.js";
-import { parseEvidence } from "../../../src/domain/evidence.js";
-import { parseJavaScriptApplicationGraph } from "../../../src/domain/javascript/javascriptApplicationGraph.js";
-import { analyzeJavaScriptApplicationInputSchema } from "../../../src/domain/javascript/javascriptApplicationAnalysis.js";
-import { writeElectronBoundaryFixture } from "../../fixtures/electronBoundaryApplication.js";
+import { analyzeJavaScriptApplication } from "../../../support/javascriptApplicationScope.js";
+import { reconstructJavaScriptArtifact } from "../../../support/javascriptApplicationScope.js";
+import { parseEvidence } from "../../../../src/domain/evidence.js";
+import { parseJavaScriptApplicationGraph } from "../../../../src/domain/javascript/javascriptApplicationGraph.js";
+import { analyzeJavaScriptApplicationInputSchema } from "../../../../src/domain/javascript/javascriptApplicationAnalysis.js";
+import { writeElectronBoundaryFixture } from "../../../fixtures/electronBoundaryApplication.js";
 
 describe("static Electron application analysis", () => {
   it("accepts relative paths and rejects caller-selected analysis bounds", () => {
diff --git a/tests/composition/javascript-applications/electronOptionKeys.test.ts b/tests/boundary/filesystem/javascript-applications/electronOptionKeys.test.ts
similarity index 95%
rename from tests/composition/javascript-applications/electronOptionKeys.test.ts
rename to tests/boundary/filesystem/javascript-applications/electronOptionKeys.test.ts
index 54cf4c11b8..1b1c0325a1 100644
--- a/tests/composition/javascript-applications/electronOptionKeys.test.ts
+++ b/tests/boundary/filesystem/javascript-applications/electronOptionKeys.test.ts
@@ -2,9 +2,9 @@ import { writeFile } from "node:fs/promises";
 import { join } from "node:path";
 import { describe, expect, it } from "vitest";
 
-import { reconstructJavaScriptArtifact } from "../../support/javascriptApplicationScope.js";
-import { createTestTempDirectory } from "../../fixtures/temporaryDirectory.js";
-import { parseJavaScriptApplicationGraph } from "../../../src/domain/javascript/javascriptApplicationGraph.js";
+import { reconstructJavaScriptArtifact } from "../../../support/javascriptApplicationScope.js";
+import { createTestTempDirectory } from "../../../fixtures/temporaryDirectory.js";
+import { parseJavaScriptApplicationGraph } from "../../../../src/domain/javascript/javascriptApplicationGraph.js";
 
 const PRELOAD = '{ preload: "./preload.js", sandbox: true }';
 const EXPLICIT = `webPreferences: ${PRELOAD}`;
diff --git a/tests/composition/javascript-applications/javascriptArtifactReconstruction.test.ts b/tests/boundary/filesystem/javascript-applications/javascriptArtifactReconstruction.test.ts
similarity index 93%
rename from tests/composition/javascript-applications/javascriptArtifactReconstruction.test.ts
rename to tests/boundary/filesystem/javascript-applications/javascriptArtifactReconstruction.test.ts
index 65dd20a352..6b7253b6d7 100644
--- a/tests/composition/javascript-applications/javascriptArtifactReconstruction.test.ts
+++ b/tests/boundary/filesystem/javascript-applications/javascriptArtifactReconstruction.test.ts
@@ -1,7 +1,7 @@
 import {
   primitiveCandidateExpansionSource,
   primitiveByteExpansionSource,
-} from "../../fixtures/javascriptPrimitiveExpansion.js";
+} from "../../../fixtures/javascriptPrimitiveExpansion.js";
 import { createHash } from "node:crypto";
 import { mkdir, readFile, rm, writeFile } from "node:fs/promises";
 import { join } from "node:path";
@@ -9,47 +9,47 @@ import { join } from "node:path";
 import { createPackageWithOptions } from "@electron/asar";
 import { expect, it } from "vitest";
 
-import { createTestTempDirectory } from "../../fixtures/temporaryDirectory.js";
+import { createTestTempDirectory } from "../../../fixtures/temporaryDirectory.js";
 
 import {
   reconstructJavaScriptArtifact,
   readJavaScriptArtifactFiles,
-} from "../../support/javascriptApplicationScope.js";
+} from "../../../support/javascriptApplicationScope.js";
 import {
   analyzeJavaScriptArtifactFiles,
   analyzeAndProjectJavaScriptArtifactFiles,
-} from "../../../src/application/javascript/JavaScriptArtifactAnalysis.js";
-import { buildJavaScriptArtifactGraph } from "../../../src/application/javascript/JavaScriptArtifactGraphBuilder.js";
+} from "../../../../src/application/javascript/JavaScriptArtifactAnalysis.js";
+import { buildJavaScriptArtifactGraph } from "../../../../src/application/javascript/JavaScriptArtifactGraphBuilder.js";
 import {
   buildJavaScriptSemanticGraph,
   createJavaScriptSemanticGraphProjection,
   projectJavaScriptSemanticFileSteps,
-} from "../../../src/application/javascript/JavaScriptSemanticGraphBuilder.js";
+} from "../../../../src/application/javascript/JavaScriptSemanticGraphBuilder.js";
 import {
   projectJavaScriptModuleSemantics,
   type JavaScriptModuleSemanticIr,
-} from "../../../src/domain/javascript/javascriptModuleSemanticIr.js";
-import type { JavaScriptStaticAnalysis } from "../../../src/domain/javascript/javascriptStaticAnalysisTypes.js";
-import type { JavaScriptArtifactFile } from "../../../src/domain/javascript/javascriptArtifactFiles.js";
-import { completeJavaScriptAnalysisSteps } from "../../../src/application/javascript/JavaScriptAnalysisControl.js";
+} from "../../../../src/domain/javascript/javascriptModuleSemanticIr.js";
+import type { JavaScriptStaticAnalysis } from "../../../../src/domain/javascript/javascriptStaticAnalysisTypes.js";
+import type { JavaScriptArtifactFile } from "../../../../src/domain/javascript/javascriptArtifactFiles.js";
+import { completeJavaScriptAnalysisSteps } from "../../../../src/application/javascript/JavaScriptAnalysisControl.js";
 import {
   writeJavaScriptAnalysisTransfer,
   readJavaScriptAnalysisTransfer,
-} from "../../../src/javascript/analysis/JavaScriptAnalysisTransfer.js";
-import { javaScriptWorkerStaticAnalysisSchema } from "../../../src/javascript/analysis/JavaScriptAnalysisWorkerSchemas.js";
-import { createJavaScriptArtifactReader } from "../../../src/artifacts/javascript/JavaScriptArtifactReader.js";
+} from "../../../../src/javascript/analysis/JavaScriptAnalysisTransfer.js";
+import { javaScriptWorkerStaticAnalysisSchema } from "../../../../src/javascript/analysis/JavaScriptAnalysisWorkerSchemas.js";
+import { createJavaScriptArtifactReader } from "../../../../src/artifacts/javascript/JavaScriptArtifactReader.js";
 import {
   scanCanonicalArtifactInventory,
   scanArtifactInventory,
-} from "../../fixtures/artifactInventory.js";
-import { parseJavaScriptApplicationGraph } from "../../../src/domain/javascript/javascriptApplicationGraph.js";
-import { javascriptApplicationAnalysisResultSchema } from "../../../src/domain/javascript/javascriptApplicationAnalysis.js";
+} from "../../../fixtures/artifactInventory.js";
+import { parseJavaScriptApplicationGraph } from "../../../../src/domain/javascript/javascriptApplicationGraph.js";
+import { javascriptApplicationAnalysisResultSchema } from "../../../../src/domain/javascript/javascriptApplicationAnalysis.js";
 import {
   createJavaScriptSemanticGraph,
   isValidatedImmutableJavaScriptSemanticGraph,
-} from "../../../src/domain/javascript/javascriptSemanticGraph.js";
-import { parseJavaScriptSemanticGraph } from "../../../src/domain/javascript/javascriptSemanticGraphSerialization.js";
-import { writeJavaScriptArtifactFixture } from "../../fixtures/javascriptArtifactApplication.js";
+} from "../../../../src/domain/javascript/javascriptSemanticGraph.js";
+import { parseJavaScriptSemanticGraph } from "../../../../src/domain/javascript/javascriptSemanticGraphSerialization.js";
+import { writeJavaScriptArtifactFixture } from "../../../fixtures/javascriptArtifactApplication.js";
 
 it("reports file progress and honors cancellation before the next source", async () => {
   const root = await fixtureDirectory();
diff --git a/tests/composition/javascript-applications/javascriptBundlerAdapters.test.ts b/tests/boundary/filesystem/javascript-applications/javascriptBundlerAdapters.test.ts
similarity index 98%
rename from tests/composition/javascript-applications/javascriptBundlerAdapters.test.ts
rename to tests/boundary/filesystem/javascript-applications/javascriptBundlerAdapters.test.ts
index 0aa8297981..f5b4250723 100644
--- a/tests/composition/javascript-applications/javascriptBundlerAdapters.test.ts
+++ b/tests/boundary/filesystem/javascript-applications/javascriptBundlerAdapters.test.ts
@@ -1,6 +1,6 @@
 import { describe, expect, it } from "vitest";
 
-import { createTestTempDirectory } from "../../fixtures/temporaryDirectory.js";
+import { createTestTempDirectory } from "../../../fixtures/temporaryDirectory.js";
 
 import {
   findChunkNode,
@@ -8,7 +8,7 @@ import {
   findModuleNodeByKey,
   reconstructJavaScriptFixture,
   writeFixtureFiles,
-} from "../../support/javascriptApplicationFixture.js";
+} from "../../../support/javascriptApplicationFixture.js";
 
 describe("Webpack and Rspack runtime adapters", () => {
   it("recovers runtime entry modules, async chunks, and factory require aliases", async () => {
diff --git a/tests/composition/javascript-applications/javascriptHtmlReferenceResolution.test.ts b/tests/boundary/filesystem/javascript-applications/javascriptHtmlReferenceResolution.test.ts
similarity index 95%
rename from tests/composition/javascript-applications/javascriptHtmlReferenceResolution.test.ts
rename to tests/boundary/filesystem/javascript-applications/javascriptHtmlReferenceResolution.test.ts
index 86faea2bfe..2509379501 100644
--- a/tests/composition/javascript-applications/javascriptHtmlReferenceResolution.test.ts
+++ b/tests/boundary/filesystem/javascript-applications/javascriptHtmlReferenceResolution.test.ts
@@ -3,8 +3,8 @@ import { join } from "node:path";
 
 import { expect, it } from "vitest";
 
-import { reconstructJavaScriptArtifact } from "../../support/javascriptApplicationScope.js";
-import { createTestTempDirectory } from "../../fixtures/temporaryDirectory.js";
+import { reconstructJavaScriptArtifact } from "../../../support/javascriptApplicationScope.js";
+import { createTestTempDirectory } from "../../../fixtures/temporaryDirectory.js";
 
 it("resolves empty-path HTML script URLs against their canonical base path", async () => {
   const root = await createTestTempDirectory("rea-html-empty-reference-");
diff --git a/tests/composition/javascript-applications/javascriptModuleRelationships.test.ts b/tests/boundary/filesystem/javascript-applications/javascriptModuleRelationships.test.ts
similarity index 97%
rename from tests/composition/javascript-applications/javascriptModuleRelationships.test.ts
rename to tests/boundary/filesystem/javascript-applications/javascriptModuleRelationships.test.ts
index ca6981ebb4..756a350ddd 100644
--- a/tests/composition/javascript-applications/javascriptModuleRelationships.test.ts
+++ b/tests/boundary/filesystem/javascript-applications/javascriptModuleRelationships.test.ts
@@ -3,8 +3,8 @@ import { join } from "node:path";
 
 import { describe, expect, it } from "vitest";
 
-import { createTestTempDirectory } from "../../fixtures/temporaryDirectory.js";
-import { parseJavaScriptApplicationGraph } from "../../../src/domain/javascript/javascriptApplicationGraph.js";
+import { createTestTempDirectory } from "../../../fixtures/temporaryDirectory.js";
+import { parseJavaScriptApplicationGraph } from "../../../../src/domain/javascript/javascriptApplicationGraph.js";
 
 import {
   findExportNode,
@@ -12,7 +12,7 @@ import {
   findSourceModule,
   reconstructJavaScriptFixture,
   writeFixtureFiles,
-} from "../../support/javascriptApplicationFixture.js";
+} from "../../../support/javascriptApplicationFixture.js";
 
 describe("CommonJS and ESM module relationships", () => {
   it("composes bindings, re-exports, dynamic imports, and JSON modules", async () => {