diff --git a/headless/package.json b/headless/package.json
index 08af9df..5da07d5 100644
--- a/headless/package.json
+++ b/headless/package.json
@@ -43,7 +43,9 @@
   "files": [
     "modules",
     "consumer.mjs",
-    "README.md"
+    "README.md",
+    "STEP4_ACCEPTANCE.md",
+    "SERVICE_ACCEPTANCE.md"
   ],
   "peerDependencies": {
     "react": ">=19.3.0 <20",
diff --git a/scripts/build-headless.mjs b/scripts/build-headless.mjs
index adc366d..d3a410e 100644
--- a/scripts/build-headless.mjs
+++ b/scripts/build-headless.mjs
@@ -26,5 +26,5 @@ for(const [module,worker]of [['browser-digests','digest.worker'],['browser-image
   await readFile(join(output,'modules/canvas-runtime',`${worker}.js`));
   await writeFile(path,source.replace(before,`./${worker}.js`));
 }
-for(const name of ['package.json','consumer.mjs','README.md'])await cp(join(root,'headless',name),join(output,name));
+for(const name of ['package.json','consumer.mjs','README.md','STEP4_ACCEPTANCE.md','SERVICE_ACCEPTANCE.md'])await cp(join(root,'headless',name),join(output,name));
 console.log('Built .headless-dist: ESM, declarations, browser adapters and Worker modules');
diff --git a/tests/headless/package.integration.mjs b/tests/headless/package.integration.mjs
index 77ce7e7..c14cd5d 100644
--- a/tests/headless/package.integration.mjs
+++ b/tests/headless/package.integration.mjs
@@ -15,6 +15,11 @@ try {
   run('tar',['-xzf',join(temporary,packed[0].filename),'-C',temporary]);
   const packageRoot=join(temporary,'package');
   const metadata=JSON.parse(await readFile(join(packageRoot,'package.json'),'utf8'));
+  const readme=await readFile(join(packageRoot,'README.md'),'utf8');
+  for(const match of readme.matchAll(/\]\(([^)]+\.md)\)/g)){
+    if(/^[a-z]+:/i.test(match[1]))continue;
+    assert.ok((await readFile(join(packageRoot,match[1]),'utf8')).length>0,`packed README link is empty: ${match[1]}`);
+  }
   assert.equal(metadata.private,true);assert.equal(metadata.type,'module');
   assert.equal(Object.keys(metadata.dependencies??{}).length,0);
   assert.deepEqual(Object.keys(metadata.peerDependencies??{}).sort(),['@xyflow/react','react','react-dom']);assert.ok(Object.values(metadata.peerDependenciesMeta).every(value=>value.optional===true));
@@ -104,7 +109,7 @@ try {
 
   const browser=run(process.execPath,['tests/headless/browser-storage.mjs','--package']);
   process.stdout.write(browser);
-  console.log(JSON.stringify({compiledBrowserAdapters:true,portableBindings:true,explicitReactPeers:true,status:'ok',packedFiles:packed[0].files.length,consumer:report,nodeTypes:true,browserGlobalsBlocked:true,externalRuntimeDependenciesBlocked:true}));
+  console.log(JSON.stringify({relativeDocumentation:true,compiledBrowserAdapters:true,portableBindings:true,explicitReactPeers:true,status:'ok',packedFiles:packed[0].files.length,consumer:report,nodeTypes:true,browserGlobalsBlocked:true,externalRuntimeDependenciesBlocked:true}));
 } catch(error){
   if(error.stdout)process.stderr.write(error.stdout);
   if(error.stderr)process.stderr.write(error.stderr);