Sentio
Rust SMTP server with an API, built because they wanted agent inboxes. Linux, Windows, Docker. Now open source.
They ripped out their email stack last year so agents could have real inboxes and send paths. Sentio is that server, now public. Not a wrapper around Gmail.
Related builds
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omaharness
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pyATS Skills
Agent skill that teaches Claude how Cisco pyATS works, without standing up an MCP.
Proliferate
Open-source AI IDE for Claude Code, Codex, Grok, Cursor, OpenCode. Parallel agents, each in its own worktree.
