add web design guidelines skill (#2832)

.agents/skills/web-design-guidelines/SKILL.md

@@ -0,0 +1,39 @@
+---
+name: web-design-guidelines
+description: Review UI code for Web Interface Guidelines compliance. Use when asked to "review my UI", "check accessibility", "audit design", "review UX", or "check my site against best practices".
+metadata:
+  author: vercel
+  version: "1.0.0"
+  argument-hint: <file-or-pattern>
+---
+
+# Web Interface Guidelines
+
+Review files for compliance with Web Interface Guidelines.
+
+## How It Works
+
+1. Fetch the latest guidelines from the source URL below
+2. Read the specified files (or prompt user for files/pattern)
+3. Check against all rules in the fetched guidelines
+4. Output findings in the terse `file:line` format
+
+## Guidelines Source
+
+Fetch fresh guidelines before each review:
+
+```
+https://raw.githubusercontent.com/vercel-labs/web-interface-guidelines/main/command.md
+```
+
+Use WebFetch to retrieve the latest rules. The fetched content contains all the rules and output format instructions.
+
+## Usage
+
+When a user provides a file or pattern argument:
+1. Fetch guidelines from the source URL above
+2. Read the specified files
+3. Apply all rules from the fetched guidelines
+4. Output findings using the format specified in the guidelines
+
+If no files specified, ask the user which files to review.

skills-lock.json

@@ -19,7 +19,8 @@
     "web-design-guidelines": {
       "source": "vercel-labs/agent-skills",
       "sourceType": "github",
-      "computedHash": "a6a44d5498f7e8f68289902f3dedfc6f38ae0cee1e96527c80724cf27f727c2a"
+      "skillPath": "skills/web-design-guidelines/SKILL.md",
+      "computedHash": "f3bc47f890f42a44db1007ab390709ec368e4b8c089baee6b0007182236ac474"
     }
   }
 }