Sepia plugin for Grok Build
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).
How to install Sepia in Grok Build
grok plugin install Nanako0129/sepia --trustReview before you trust it. --trust lets this plugin's hooks, MCP servers and scripts run code on your computer. It's a community repo that neither xAI nor GrokStacks has reviewed, so read its code first.
We install this repo directly: Grok Build 1.0.62 can't install it through its own marketplace file. Then start a new Grok session, or press r in /plugins, to load it.
Command format: Grok Build's plugin guide
What we checked: on Oct 18, 2026 it installed with grok 1.0.62 and Grok found 6 skills. That's an install check only: we haven't run it in a live Grok session.
What it contains
Skills (6)
sepia— Make AI-generated writing read as human-written, in fiction and in professional prose. Repairs the narrative architecture of fiction and stories (based on StoryScope, arXiv:2604.03136); routes professional text through domain rules for relesepia-hemingway— Use when a user asks to write or revise fiction in the Hemingway manner, or asks for strong de-AI on a story; applies Sepia's built-in Hemingway voice profile.sepia-recreate— Use when a user explicitly requests Sepia recreate for a full rewrite.sepia-refactor— Use when a user explicitly requests Sepia refactor for minimal in-place prose revision.sepia-review— Use when a user explicitly requests Sepia review to diagnose prose without editing.sepia-write— Use when a user explicitly requests Sepia write to create new prose.
About this listing
Sepia is a community plugin on GitHub by Nanako0129, built for Grok Build. We install-checked it in Grok; we haven't run it in a live session or reviewed its code. When we installed it, Grok found 6 skills. Its license is MIT. We checked commit fb06be76abea. It's one of 52 listings in the Research category on GrokStacks.
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Sepia FAQ
How do I install Sepia in Grok Build?
Run grok plugin install Nanako0129/sepia --trust. We install-checked this command in Grok Build. We install this repo directly: Grok Build 1.0.62 can't install it through its own marketplace file. Then start a new Grok session, or press r in /plugins, to load it.
Is Sepia an official Grok Build plugin?
No. Sepia is a community plugin on GitHub by Nanako0129, not in xAI's official Grok Build marketplace. We checked that it installs and what Grok loads from it, but haven't run it in a live Grok session or reviewed its code.
What does Sepia include?
According to what Grok loaded in our install check, Sepia includes 6 skills: sepia, sepia-hemingway, sepia-recreate, sepia-refactor, sepia-review, sepia-write.
Details
- Type
- Plugin
- Category
- Research
- Source
- Community plugin, built for Grok Build
- License
- MIT
- Author
- Nanako0129
- Version
- 0.12.4
- Keywords
- agent-skills, ai-writing, antigravity, claude-code, codex, developer-tools, fiction, grok, humanizer, llm, prompt-engineering, writing-tools
- Source repo
- https://github.com/Nanako0129/sepia
- Checked commit
fb06be76abea- Checked by GrokStacks
- Install-checked in Grok Build on Oct 18, 2026; not run in a live session
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For maintainers: badge and embeds
Maintain Sepia? Add the badge; it links to this page.
Markdown
[](https://grokstacks.com/p/sepia/)HTML
<a href="https://grokstacks.com/p/sepia/"><img src="https://grokstacks.com/badge.svg" alt="Listed on GrokStacks" width="164" height="28"></a>Embed card (static HTML and inline CSS, no JavaScript). Preview:
<a href="https://grokstacks.com/p/sepia/" style="display:block;max-width:380px;box-sizing:border-box;padding:14px 16px;border:1px solid #2a2e3c;border-radius:12px;background:#0a0b0f;color:#e8eaf0;font:14px/1.45 -apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;text-decoration:none"><span style="display:block;font-size:16px;font-weight:700;color:#e8eaf0">Sepia</span><span style="display:block;margin:2px 0 8px;font-size:12px;color:#9aa0b1">Community plugin for Grok Build · 6 skills</span><span style="display:block;margin:0 0 10px;color:#c9cdd8">De-AI writing skill for any Agent Skills-compatible agent (77+ via the Skills CLI), with native plugins for Claude…</span><span style="font-size:12px;font-weight:600;color:#7c9cff">View on GrokStacks →</span></a>Markdown summary
**[Sepia on GrokStacks](https://grokstacks.com/p/sepia/)**: Community plugin for Grok Build with 6 skills. Install: `grok plugin install Nanako0129/sepia --trust`More on badges, embeds and keeping your listing up to date: GrokStacks for plugin authors.
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