diff --git a/LifeOS/install/LIFEOS/PULSE/modules/tab-freshness.ts b/LifeOS/install/LIFEOS/PULSE/modules/tab-freshness.ts
index 0fc37f7725..7103511207 100644
--- a/LifeOS/install/LIFEOS/PULSE/modules/tab-freshness.ts
+++ b/LifeOS/install/LIFEOS/PULSE/modules/tab-freshness.ts
@@ -168,7 +168,7 @@ function resolveSpec(spec: SourceSpec): ResolvedSource[] {
     const out: ResolvedSource[] = []
     let entries: string[] = []
     try {
-      entries = readdirSync(spec.path).filter((e) => e.endsWith(".md") || e.endsWith(".json") || e.endsWith(".yaml"))
+      entries = readdirSync(spec.path).filter((e) => e.endsWith(".md") || e.endsWith(".json") || e.endsWith(".yaml") || e.endsWith(".yml"))
     } catch {
       // unreadable dir — record as missing
       return [{ name: spec.name, path: spec.path, exists: false, mtime: null }]
diff --git a/LifeOS/install/LIFEOS/TOOLS/DocCheck.ts b/LifeOS/install/LIFEOS/TOOLS/DocCheck.ts
index 74afe68182..dcc0f0196d 100644
--- a/LifeOS/install/LIFEOS/TOOLS/DocCheck.ts
+++ b/LifeOS/install/LIFEOS/TOOLS/DocCheck.ts
@@ -164,7 +164,7 @@ function findDocs(): string[] {
   const secDir = join(LIFEOS_DIR, 'USER', 'SECURITY');
   try {
     for (const f of readdirSync(secDir)) {
-      if (f.endsWith('.md') || f.endsWith('.yaml')) docs.push(join(secDir, f));
+      if (f.endsWith('.md') || f.endsWith('.yaml') || f.endsWith('.yml')) docs.push(join(secDir, f));
     }
   } catch { /* */ }
 
diff --git a/LifeOS/install/skills/Evals/Tools/EvalRunner.ts b/LifeOS/install/skills/Evals/Tools/EvalRunner.ts
index 967edea5a1..99074d60e6 100644
--- a/LifeOS/install/skills/Evals/Tools/EvalRunner.ts
+++ b/LifeOS/install/skills/Evals/Tools/EvalRunner.ts
@@ -82,8 +82,11 @@ export function buildLiveSystemPrompt(): string {
 
 function resolveSuite(name: string): string | null {
   for (const dir of [USER_SUITES, SKILL_SUITES]) {
-    for (const p of [join(dir, `${name}.yaml`), join(dir, 'Regression', `${name}.yaml`), join(dir, 'Capability', `${name}.yaml`)]) {
-      if (existsSync(p)) return p;
+    // .yaml first, so an existing .yaml keeps winning if both somehow exist.
+    for (const ext of ['yaml', 'yml']) {
+      for (const p of [join(dir, `${name}.${ext}`), join(dir, 'Regression', `${name}.${ext}`), join(dir, 'Capability', `${name}.${ext}`)]) {
+        if (existsSync(p)) return p;
+      }
     }
   }
   return null;
diff --git a/LifeOS/install/skills/Evals/Tools/SuiteManager.ts b/LifeOS/install/skills/Evals/Tools/SuiteManager.ts
index 96ebc2b866..a57d27e81b 100755
--- a/LifeOS/install/skills/Evals/Tools/SuiteManager.ts
+++ b/LifeOS/install/skills/Evals/Tools/SuiteManager.ts
@@ -91,7 +91,7 @@ export function listSuites(type?: EvalType): EvalSuite[] {
     if (!existsSync(dirPath)) continue;
 
     for (const file of readdirSync(dirPath)) {
-      if (file.endsWith('.yaml')) {
+      if (file.endsWith('.yaml') || file.endsWith('.yml')) {
         const suite = parseYaml(readFileSync(join(dirPath, file), 'utf-8')) as EvalSuite;
         suites.push(suite);
       }