manual cleanup

[yourconscience]

Summary by Sourcery

Remove obsolete repository files and tidy up project metadata.

Documentation:

• Remove the obsolete plugin support design document.

Chores:

• Clean up repository metadata and ignore rules by removing the mailmap and updating .gitignore.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Performs a manual repository cleanup by revising .gitignore and removing the mailmap plus the obsolete plugin-support design document.

File-Level Changes

Change	Details	Files
Clean up repository metadata and remove obsolete plugin-support documentation.	Simplify ignore-file entries by removing obsolete patterns and adding four replacements. Delete the repository mailmap. Delete the 662-line plugin support design document.	.gitignore .mailmap PLUGIN-SUPPORT-DESIGN.md

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[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: 7fd1277d18

ℹ️ About Codex in GitHub

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[chatgpt-codex-connector]

Continue ignoring local MCP credentials

Because starter_assets.go embeds this file and ensureStarterAssets installs it into every newly scaffolded canonical configuration root, removing these patterns causes git add . to stage .env secrets, authentication session files, and generated virtual environments for users who keep local MCP implementations under mcp/<name>/. Restore the MCP-specific ignores so credentials and runtime state are not accidentally committed.

AGENTS.md reference: AGENTS.md:L54-L56

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