fix(skills): address QA round 2

- Add azure-pipelines.yml to PROJECT_FILES and Azure pack matchFiles
- Add serverless.yaml variant to PROJECT_FILES and AWS pack matchFiles
- Fix marker fd leak in migrateSkillsToEcosystemDir: wrap mkdirSync
  inside try/finally, remove marker on failure so migration retries

src/resource-loader.ts

@@ -448,10 +448,10 @@ function migrateSkillsToEcosystemDir(agentDir: string): void {
     return // marker already exists (another process won the race, or already migrated)
   }
 
-  const ecosystemDir = join(homedir(), '.agents', 'skills')
-  mkdirSync(ecosystemDir, { recursive: true })
-
   try {
+    const ecosystemDir = join(homedir(), '.agents', 'skills')
+    mkdirSync(ecosystemDir, { recursive: true })
+
     const entries = readdirSync(legacyDir, { withFileTypes: true })
     let migrated = 0
     for (const entry of entries) {
@@ -495,7 +495,8 @@ function migrateSkillsToEcosystemDir(agentDir: string): void {
     // Write migration info to the marker
     try { writeFileSync(markerFd, `Migrated ${migrated} skill(s) to ${ecosystemDir} on ${new Date().toISOString()}\n`) } catch { /* non-fatal */ }
   } catch {
-    // can't read legacy dir — skip silently
+    // can't create ecosystem dir or read legacy dir — remove marker so we retry next launch
+    try { unlinkSync(markerPath) } catch { /* non-fatal */ }
   } finally {
     try { closeSync(markerFd) } catch { /* non-fatal */ }
   }

src/resources/extensions/gsd/detection.ts

@@ -97,6 +97,8 @@ export const PROJECT_FILES = [
   "cdk.json",
   "samconfig.toml",
   "serverless.yml",
+  "serverless.yaml",
+  "azure-pipelines.yml",
   // React Native markers
   "metro.config.js",
   "metro.config.ts",

src/resources/extensions/gsd/skill-catalog.ts

@@ -254,13 +254,14 @@ export const SKILL_CATALOG: SkillPack[] = [
       "azure-cost-optimization",
       "azure-diagnostics",
     ],
+    matchFiles: ["azure-pipelines.yml"],
   },
   {
     label: "AWS",
     description: "AWS deployment, Lambda, and serverless patterns",
     repo: "awslabs/agent-plugins",
     skills: ["deploy", "aws-lambda", "aws-serverless-deployment"],
-    matchFiles: ["cdk.json", "samconfig.toml", "serverless.yml"],
+    matchFiles: ["cdk.json", "samconfig.toml", "serverless.yml", "serverless.yaml"],
   },
   // ── Essential (all projects) ────────────────────────────────────────────
   {