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Last commit on October 6, 2026·Created on August 28, 2026

Nanako0129/sepia

“Refines AI-generated prose into disciplined, human-centric narrative and professional writing.”
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#7
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TL;DR

Sepia provides a suite of tools for writers to strip away AI artifacts from creative stories and professional text. It focuses on narrative architecture repair and minimal in-place revisions to ensure prose meets specific venue standards.

Fiction writers can apply a Hemingway voice profile to achieve a leaner style, while professional writers can use targeted refactoring to move away from synthetic patterns toward more natural language.

WHO IT'S FOR
Fiction writers
remove AI artifacts from creative stories
Professional prose writers
refactor AI-generated text for professional venues
AI agent power users
integrate advanced writing skills into AI agents
Editors and copywriters
diagnose prose quality without modifying text
Repository contents

6 skill files

Categories
Compatible AgentsThe repository documents support for these agents. The skills may also work with other agents that can load SKILL.md files, but they may need some setup or small changes.

Use this skill collection

Follow the documented setup, then try a first task.

Setup

Skills CLI

Installs: User scope: sepia through Skills CLI; select supported agents when prompted.

  1. Run this command in a terminal, then select your agents when prompted.

    npx skills add Nanako0129/sepia -g     # -g = user scope; the default is project
README.md ↗ · Checked Oct 12, 2026

Give it something to do.

Suggested first task

Diagnose a short draft without editing

Uses sepia

  • A short prose draft, pasted into the request.
  • Its document type or intended venue.
  • The author model and exact version, if known; otherwise leave them unknown.

Make sure sepia is installed in your agent before trying this task.

Use sepia's review operation to diagnose AI tells in the short draft I provide. Do not edit it. Route it according to its document type and report the author and executor model identities and prose-layer status; treat an unspecified author model as unknown.
skills/sepia/SKILL.md ↗ · Checked Oct 12, 2026
Suggested first task

Make minimal edits to a release note

Uses sepia-refactor

  • A short release-note draft, pasted into the request.
  • The complete Sepia package, with the canonical sepia skill installed alongside sepia-refactor.

Make sure sepia-refactor is installed in your agent before trying this task.

Use sepia-refactor to revise the short release-note draft I provide with minimal in-place edits. Apply Sepia's release-notes route and preserve the factual meaning.
skills/sepia-refactor/SKILL.md ↗ · Checked Oct 12, 2026skills/sepia/SKILL.md ↗ · Checked Oct 12, 2026
Suggested first task

Write a short fiction scene with the Hemingway voice

Uses sepia-hemingway

  • A fiction premise with a setting, characters, and immediate conflict.
  • The complete Sepia package, with the canonical sepia skill installed alongside sepia-hemingway.

Make sure sepia-hemingway is installed in your agent before trying this task.

Use sepia-hemingway to write a short fiction scene from the premise I provide, applying Sepia's built-in Hemingway voice. Keep the scene to about 300 words.
skills/sepia-hemingway/SKILL.md ↗ · Checked Oct 12, 2026skills/sepia/SKILL.md ↗ · Checked Oct 12, 2026