Add Serena MCP server documentation

[Copilot]

Adds comprehensive documentation for Serena, an MCP server that provides semantic code analysis and IDE-like editing capabilities to agentic workflows.

Documentation Structure

• Configuration: Short syntax (serena: ["go", "typescript"]) and detailed configuration for language-specific settings (Go module paths, gopls versions, Python versions)
• Language Support: Documents 30+ supported languages via LSP integration
• Tool Catalog: Symbol navigation (find_symbol, find_referencing_symbols), code editing (replace_symbol_body, insert_after_symbol), and project analysis capabilities
• Integration Patterns: Memory configuration for caching, workflow examples for code analysis/refactoring/documentation
• Troubleshooting: Common issues with language servers, memory permissions, and Go module paths

Key Capabilities Highlighted

Serena enables agents to operate at symbol level rather than file level:

tools:
  serena:
    languages:
      go:
        version: "1.21"
        go-mod-file: "go.mod"
        gopls-version: "v0.14.2"
      typescript:
      python:
        version: "3.12"

Documentation synthesized from 22 production workflows across the repository and official Serena sources.

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:

• telemetry.astro.build
  • Triggering command: /opt/hostedtoolcache/node/24.13.0/x64/bin/node node /home/REDACTED/work/gh-aw/gh-aw/docs/node_modules/.bin/astro build grep -l serena md tnet/tools/grep oraios/serena s.md 0/x64/bin/grep grep -l serena .md 0/x64/bin/grep oraios/serena ator.md /home/REDACTED/.conpx @marp-team/marp-cli slides/index.md --html --allow-local-files -o public/sli-o grep (dns 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)

Original prompt

Write a dedicated documentation page on using "serena" tool in an agentic workflow. Mine existing workflows that use this MCP and also review the MCP home page.

Custom agent used: technical-doc-writer
AI technical documentation writer for GitHub Actions library using GitHub Docs voice

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