Release notes, PR replies and postmortems that read like a chatbot wrote them? sepia is an Agent Skill from
@Nyanako0129 that removes AI tells by repairing narrative structure first, then discourse flow, then surface style. It offers write, review, refactor and recreate operations, per-model fingerprints for Claude, GPT, Gemini, DeepSeek and Kimi, and venue-matched rules. MIT licensed, and it works with Claude Code, Codex, Cursor, Cline, Windsurf, Copilot, OpenCode and goose.