diff --git a/scripts/candidate-files.mjs b/scripts/candidate-files.mjs
index 2a694211..63e8613f 100644
--- a/scripts/candidate-files.mjs
+++ b/scripts/candidate-files.mjs
@@ -16,17 +16,17 @@ export function readFlatFiles(dir) {
   return result;
 }
 function find(dir, name) {
-  const hits=[];
-  function visit(path,depth) {
-    if(depth>8) throw Error('Bundle directory depth exceeded');
-    for(const entry of readdirSync(path,{withFileTypes:true})) {
-      if(entry.isSymbolicLink()) continue; // app symlinks are not release assets.
-      const next=join(path,entry.name);
-      if(entry.isDirectory()) { if(!entry.name.endsWith('.app')) visit(next,depth+1); }
-      else if(entry.isFile() && entry.name===name) hits.push(next);
-    }
+  // Tauri puts finished files directly in each bundle-kind directory. Walking
+  // its sibling AppDir/deb staging trees can exceed bounds and select copies.
+  let path='.';
+  for(const segment of dir.split('/')) {
+    path=join(path,segment);const stat=lstatSync(path);
+    if(!stat.isDirectory() || stat.isSymbolicLink()) throw Error('Expected a regular bundle directory');
   }
-  visit(dir,0); if(hits.length!==1) throw Error(`Expected one bundle ${name}, found ${hits.length}`); return hits[0];
+  const hits=readdirSync(dir,{withFileTypes:true}).filter(entry=>entry.name.toLowerCase()===name.toLowerCase());
+  if(hits.length!==1 || hits[0].name!==name) throw Error(`Expected one exact bundle ${name}, found ${hits.length}`);
+  if(!hits[0].isFile() || hits[0].isSymbolicLink()) throw Error('Expected a regular bundle');
+  return join(dir,name);
 }
 export function signFile(path, cliPath=resolve('ui-desktop/node_modules/@tauri-apps/cli/tauri.js')) {
   try { execFileSync(process.execPath,[cliPath,'signer','sign',resolve(path)],{stdio:'pipe',timeout:120000,maxBuffer:1024*1024}); }
@@ -35,15 +35,15 @@ export function signFile(path, cliPath=resolve('ui-desktop/node_modules/@tauri-a
 export function collect(platform, version, output='candidate-part', operations={signFile}) {
   const names=bundleNames(version), root='ui-desktop/src-tauri/target';
   const sources={
-    windows:[[`${root}/release/bundle`,names[0],names[0]]],
-    macos:[[`${root}/universal-apple-darwin/release/bundle`,names[1],names[1]],[`${root}/universal-apple-darwin/release/bundle`,'Tenebra.app.tar.gz',names[2]]],
-    linux:[[`${root}/release/bundle`,names[3],names[3]],[`${root}/release/bundle`,names[4],names[4]]],
+    windows:[[`${root}/release/bundle/nsis`,names[0],names[0]]],
+    macos:[[`${root}/universal-apple-darwin/release/bundle/dmg`,names[1],names[1]],[`${root}/universal-apple-darwin/release/bundle/macos`,'Tenebra.app.tar.gz',names[2]]],
+    linux:[[`${root}/release/bundle/deb`,names[3],names[3]],[`${root}/release/bundle/appimage`,names[4],names[4]]],
     arch:[['packaging/arch',names[5],names[5]]],
   };
   if(!Object.hasOwn(sources,platform)) throw Error('Unsupported platform');
   mkdirSync(output); // refuse reuse: same-name uploads must never clobber.
   for(const [dir,raw,name] of sources[platform]) {
-    const source=platform==='arch'?join(dir,raw):find(dir,raw);
+    const source=find(dir,raw);
     const stat=lstatSync(source);if(!stat.isFile()||stat.isSymbolicLink())throw Error('Expected a regular bundle');
     copyFileSync(source,join(output,name));
     // Sign the staged filenames, including deb/DMG/Arch. No key in argv/logs.
diff --git a/scripts/candidate-files.test.mjs b/scripts/candidate-files.test.mjs
index 4c049b70..2a8e804e 100644
--- a/scripts/candidate-files.test.mjs
+++ b/scripts/candidate-files.test.mjs
@@ -1,9 +1,75 @@
 import { test } from 'node:test';
 import assert from 'node:assert/strict';
-import { mkdtempSync, mkdirSync, writeFileSync, readFileSync, rmSync, rmdirSync } from 'node:fs';
-import { join } from 'node:path';
+import { mkdtempSync, mkdirSync, writeFileSync, readFileSync, rmSync, rmdirSync, symlinkSync, existsSync } from 'node:fs';
+import { join, dirname, resolve } from 'node:path';
 import { tmpdir } from 'node:os';
 import { collect, readFlatFiles } from './candidate-files.mjs';
+const release='ui-desktop/src-tauri/target/release/bundle';
+const universal='ui-desktop/src-tauri/target/universal-apple-darwin/release/bundle';
+const layouts={
+  windows:[[`${release}/nsis/Tenebra_0.6.0_x64-setup.exe`,'Tenebra_0.6.0_x64-setup.exe']],
+  linux:[[`${release}/deb/Tenebra_0.6.0_amd64.deb`,'Tenebra_0.6.0_amd64.deb'],[`${release}/appimage/Tenebra_0.6.0_amd64.AppImage`,'Tenebra_0.6.0_amd64.AppImage']],
+  macos:[[`${universal}/dmg/Tenebra_0.6.0_universal.dmg`,'Tenebra_0.6.0_universal.dmg'],[`${universal}/macos/Tenebra.app.tar.gz`,'Tenebra_universal.app.tar.gz']],
+};
+function fixture(platform) {
+  for(const [path,name] of layouts[platform]) {mkdirSync(dirname(path),{recursive:true});writeFileSync(path,`bundle ${name}`);}
+  for(const id of platform==='macos'?['macos-arm64','macos-amd64']:[platform])writeFileSync(`core-buildinfo-${id}.json`,`report ${id}`);
+}
+const testSigner={signFile:path=>writeFileSync(path+'.sig','test signature')};
+test('Linux collects finished kind outputs despite the actual deep AppDir and deb staging layout',()=>{
+  const dir=mkdtempSync(join(tmpdir(),'candidate-test-')),old=process.cwd();
+  try {
+    process.chdir(dir);fixture('linux');
+    for(const staging of ['appimage/Tenebra.AppDir','deb/Tenebra_0.6.0_amd64']) {
+      const path=`${release}/${staging}/usr/lib/a/b/c/d/e/f/g/h/i/j`;
+      mkdirSync(path,{recursive:true});writeFileSync(join(path,'cache'),'unrelated staging bytes');
+    }
+    collect('linux','0.6.0','output',testSigner);
+    for(const [,name] of layouts.linux)assert.equal(readFileSync(join('output',name),'utf8'),`bundle ${name}`);
+    assert.equal(readFlatFiles('output').size,5);
+  } finally {process.chdir(old);rmSync(dir,{recursive:true});}
+});
+for(const platform of ['windows','linux','macos']) {
+  test(`${platform} uses only exact final bundle-kind paths`,()=>{
+    const dir=mkdtempSync(join(tmpdir(),'candidate-test-')),old=process.cwd();
+    try {
+      process.chdir(dir);fixture(platform);collect(platform,'0.6.0','output',testSigner);
+      for(const [,name] of layouts[platform])assert.equal(readFileSync(join('output',name),'utf8'),`bundle ${name}`);
+      rmSync(layouts[platform][0][0]);
+      const fallback=join(dirname(dirname(layouts[platform][0][0])),'unexpected',layouts[platform][0][1]);
+      mkdirSync(dirname(fallback),{recursive:true});writeFileSync(fallback,'wrong-location bytes');
+      assert.throws(()=>collect(platform,'0.6.0','must-fail',testSigner));
+    } finally {process.chdir(old);rmSync(dir,{recursive:true});}
+  });
+}
+test('collection rejects a symlinked bundle-kind directory before reading or signing its target',()=>{
+  const dir=mkdtempSync(join(tmpdir(),'candidate-test-')),old=process.cwd();let signed=false;
+  try {
+    process.chdir(dir);fixture('windows');rmSync(`${release}/nsis`,{recursive:true});
+    mkdirSync('outside');writeFileSync('outside/Tenebra_0.6.0_x64-setup.exe','outside bytes');
+    symlinkSync(resolve('outside'),`${release}/nsis`,process.platform==='win32'?'junction':'dir');
+    assert.throws(()=>collect('windows','0.6.0','output',{signFile:()=>{signed=true;}}));assert.equal(signed,false);
+  } finally {process.chdir(old);rmSync(dir,{recursive:true});}
+});
+test('collection rejects a symbolic-link leaf instead of signing an alternate target',()=>{
+  const dir=mkdtempSync(join(tmpdir(),'candidate-test-')),old=process.cwd();let signed=false;
+  try {
+    process.chdir(dir);fixture('windows');rmSync(layouts.windows[0][0]);
+    // Junctions need no Windows symlink privilege and exercise lstat's link guard.
+    if(process.platform==='win32'){mkdirSync('outside');symlinkSync(resolve('outside'),layouts.windows[0][0],'junction');}
+    else{writeFileSync('outside','outside bytes');symlinkSync(resolve('outside'),layouts.windows[0][0]);}
+    assert.throws(()=>collect('windows','0.6.0','output',{signFile:()=>{signed=true;}}));assert.equal(signed,false);
+  } finally {process.chdir(old);rmSync(dir,{recursive:true});}
+});
+test('case-alias duplicate bundle names are refused on case-sensitive filesystems',t=>{
+  const dir=mkdtempSync(join(tmpdir(),'candidate-test-')),old=process.cwd();
+  try {
+    process.chdir(dir);writeFileSync('case-probe-A','probe');
+    if(existsSync('case-probe-a')){t.skip('Filesystem cannot contain distinct case-alias entries');return;}
+    fixture('linux');writeFileSync(`${release}/deb/tenebra_0.6.0_amd64.deb`,'ambiguous bytes');
+    assert.throws(()=>collect('linux','0.6.0','output',testSigner));
+  } finally {process.chdir(old);rmSync(dir,{recursive:true});}
+});
 test('Arch collection reads its one package without traversing dependency caches or rebuilt source',()=>{
   const dir=mkdtempSync(join(tmpdir(),'candidate-test-')),old=process.cwd();
   try {