Fix rendering issues in mermaid diagrams in Agentic Wiki Writer

[Copilot]

Fixes mermaid diagram rendering errors in the Agentic Wiki Writer. The root cause was that the agent was generating mermaid node labels using backtick/markdown-string notation (e.g. A["`text`"]) and \n escape sequences — both of which are unsupported by GitHub's mermaid renderer and cause "Unable to render rich display" lexer errors.

Changes Made

• Critical mermaid restrictions: Added an explicit restrictions block under the mermaid syntax rules in workflows/agentic-wiki-writer.md, prohibiting:

  • Backtick/markdown-string notation inside node labels
  • \n escape sequences inside node labels
  • Unquoted special characters in labels
  • Includes clear valid/invalid examples for each restriction

• Self-Review Checklist: Added item Add Supply Chain Security Specialist agent for vulnerability analysis and reporting #6 instructing the agent to validate every mermaid diagram for these syntax issues before finalizing each wiki page, with specific checks and remediation guidance.

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[mrjf]

@copilot I resolve the billing error. Please resume work on this PR.

[Copilot]

@copilot I resolve the billing error. Please resume work on this PR.

Resumed work and implemented the fix in commit 197ea19.

The root cause was that the wiki writer was generating mermaid diagrams using backtick/markdown-string notation (A["`text`"]) and \n escape sequences inside node labels — both of which cause "Unable to render rich display" lexer errors in GitHub's mermaid renderer.

Changes made to workflows/agentic-wiki-writer.md:

1. Added a "Critical mermaid restrictions" section under the existing mermaid syntax rules, explicitly prohibiting backtick strings and \n in labels with clear examples
2. Added item Add Supply Chain Security Specialist agent for vulnerability analysis and reporting #6 to the Self-Review Checklist so the agent validates every mermaid diagram for these issues before finalizing each wiki page

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• https://api.github.com/repos/githubnext/agentics/actions/workflows
  • Triggering command: /usr/bin/gh gh workflow list --all --json id,name,path,state (http block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)