Nanako0129/sepia
De-AI writing skill for any Agent Skills-compatible agent (77+ via the Skills CLI), with native plugins for Claude Code, Codex, Grok Build, and Antigravity. Narrative-architecture repair for fiction, venue-matched rules for professional prose. Based on StoryScope (arXiv:2604.03136).
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From the publisher
README & documentation
Source previewRead the project’s overview, installation instructions and usage examples. The original README is the source of truth.
English | 繁體中文 | 简体中文 [](https://github.com/Nanako0129/sepia/actions/workflows/behavioral-eval.yml) [](https://github.com/Nanako0129/sepia/actions/workflows/version-consistency.yml) [](https://github.com/Nanako0129/sepia/releases/latest) [](LICENSE) A portable Agent Skill: any agent that speaks the standard can load it, and the Skills CLI, which supports 77+ agents, installs it with one command. Claude Code, Codex, Grok Build, Antigravity, and QwenPaw additionally get native plugin packaging. One canonical SKILL.md, no per-platform forks. Four operations: write, review (diagnose only), refactor (minimal edits), recreate (full rewrite). Every popular humanizer edits word choice and syntax. StoryScope (Russell et al., 2026: 61,608 stories, human + 5 frontier LLMs) showed that a classifier using narrative-structure features alone detects AI fiction at 93.2% macro-F1. In the same study's LAMP-edited condition, where human editors had rewritten the surface style, detection dropped only from 95.5% to 93.9%. The tells that survive are architectural: themes explained by the narrator, single-track causally-tidy plots, emotions rendered only as bodily sensation, no real-world references, no reader, linear time, endings resolved…
Read the full README ↗ · Preview checked 2026-10-29T16:33:32.727Z
Inside the original README — Document outline
- sepia
- Table of Contents
- Why another humanizer
- Operation entries
- Experimental: composing with voice skills
- Writing with a persona: a short how-to
- Sentence rhythm and Chinese calibration
- Install
- Any agent (Skills CLI, 77+ agents)
- Claude Code
- Codex
- Grok Build
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Links from the README
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What this repository does
De-AI writing skill for any Agent Skills-compatible agent (77+ via the Skills CLI), with native plugins for Claude Code, Codex, Grok Build, and Antigravity. Narrative-architecture repair for fiction, venue-matched rules for professional prose. Based on StoryScope (arXiv:2604.03136).
Repository facts
- Owner
- Nanako0129
- Primary language
- Python
- Stars
- 2,878
- Forks
- 187
- Open issues + pull requests
- 11
- License
- MIT
- Archived
- No
- Default branch
- main
- Created
- 2026-08-28T05:56:49.000Z
- Last push
- 2026-09-23T20:03:22.000Z
Topics and intended use
Owner-supplied topics: agent-skills, ai-writing, antigravity, claude-code, codex, developer-tools, fiction, grok, humanizer, llm, prompt-engineering, writing-tools
Review the README for scope, installation, examples and limitations. We do not run repository code or certify it.
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Source and freshness
Source: GitHub. Metadata observed 2026-09-27T12:04:53.894Z. Daily imports are snapshots, not real-time monitoring.
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