fix: Resolve dead links in documentation files

- 02-memory/README.md: Remove broken example links, keep valid ones
- CONTRIBUTING.md: Fix relative path to SECURITY.md
- 07-plugins/README.md: Update MCP spec URL to working domain
- .github/SECURITY_REPORTING.md: Update OWASP link to valid cheatsheet
- .github/ISSUE_TEMPLATE/*: Replace placeholder links with comments
- .github/markdown-link-check-config.json: Add ignore patterns for
  example URLs in code blocks (docs.example.com, template files)

.github/ISSUE_TEMPLATE/documentation.md

@@ -41,4 +41,4 @@ How does this issue impact users?
 
 ## Related Documentation
 Links to related sections:
-- [Related Guide](link)
+- Related Guide: <!-- Add link here -->

.github/ISSUE_TEMPLATE/feature_request.md

@@ -33,7 +33,7 @@ If applicable, provide an example of what you envision:
 
 ## Related Examples
 Link any existing related examples or guides:
-- [Existing Guide](link)
+- Existing Guide: <!-- Add link here -->
 - Feature: (e.g., Skills, Hooks, Subagents)
 
 ## Additional Context

.github/SECURITY_REPORTING.md

@@ -301,7 +301,7 @@ A: Check GitHub security advisories page. If you still don't see a response, you
 - [SECURITY.md](../SECURITY.md) - Full security policy
 - [CONTRIBUTING.md](../CONTRIBUTING.md) - Contributing guidelines
 - [CODE_OF_CONDUCT.md](../CODE_OF_CONDUCT.md) - Community standards
-- [OWASP Guide](https://owasp.org/www-project-responsible-disclosure/) - Responsible disclosure best practices
+- [OWASP Vulnerability Disclosure](https://cheatsheetseries.owasp.org/cheatsheets/Vulnerability_Disclosure_Cheat_Sheet.html) - Responsible disclosure best practices
 - [Coordinated Vulnerability Disclosure](https://cheatsheetseries.owasp.org/cheatsheets/Vulnerable_Dependency_Management_Cheat_Sheet.html)
 
 ---

.github/markdown-link-check-config.json

@@ -1,5 +1,21 @@
 {
   "ignorePatterns": [
+    {
+      "pattern": "^https://docs\\.example\\.com",
+      "comment": "Example placeholder URLs in documentation templates"
+    },
+    {
+      "pattern": "^\\./docs/",
+      "comment": "Example relative paths in documentation templates"
+    },
+    {
+      "pattern": "^FORMS\\.md$|^REFERENCE\\.md$",
+      "comment": "Example file references in skill templates"
+    },
+    {
+      "pattern": "^https://en\\.wikipedia\\.org/wiki/N%2B1",
+      "comment": "Wikipedia N+1 article - URL encoding issues"
+    },
     {
       "pattern": "^https://twitter.com",
       "comment": "Twitter/X links require authentication"