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sepia

v0.10.0

De-AI writing package with the general Sepia router plus five separate operation entries: write, review, refactor, recreate, and hemingway.

CodexClaude Code6 Skills

By Nanako TsaiLicense: MIT2.7k GitHub starsUpdated 5 days ago

Directory evidence

Runtimes
Codex and Claude Code
Parsed components
6 skill or MCP entries
Source updated
Sep 18, 2026
Manifest status
Canonical path parsed

The directory validates manifest shape and source location. It does not execute the plugin or provide a security endorsement. Review the indexing methodology →

Install sepia for Codex and Claude Code

Installs for the current user
codex plugin marketplace add Nanako0129/sepia
codex plugin marketplace upgrade sepia
codex plugin add sepia@sepia

Paste and run these commands in a terminal with Codex. They add and refresh the sepia catalog, then install this plugin.

Compatibility: the page URL and API slug “sepia-2” remain stable.

  • Codex: sepia-2@agent-plugin-marketplace → sepia@sepia

The installer fetches third-party code from the source repository shown on this page. This directory validates manifest structure and source location, but does not perform a security audit; review the manifest, components, and source before installing.

Get the source manually
git clone https://github.com/Nanako0129/sepia

Clone the source repository, then follow its setup instructions to add the plugin to a compatible client. The repository root is the plugin root.

Plugin files

sepia/
├── .codex-plugin/plugin.json
├── .claude-plugin/plugin.json
├── skills/sepia/SKILL.md
├── skills/sepia-hemingway/SKILL.md
├── skills/sepia-recreate/SKILL.md
├── skills/sepia-refactor/SKILL.md
├── skills/sepia-review/SKILL.md
└── skills/sepia-write/SKILL.md

Included Skills6

sepiaskills/sepia/SKILL.md

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 release notes, announcements, PR and issue replies, code-review comments, incident postmortems, tickets, work orders, technical articles, blog posts, and long-form journalism. Four operations - write, review (diagnose AI tells without editing), refactor (minimal in-place edits), recreate (full rewrite). Use when asked to humanize, de-AI, unslop, or strip AI flavor from any text; when writing or revising any of these document types; or whenever output must not read as machine-written.

sepia-hemingwayskills/sepia-hemingway/SKILL.md

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-recreateskills/sepia-recreate/SKILL.md

Use when a user explicitly requests Sepia recreate for a full rewrite.

sepia-refactorskills/sepia-refactor/SKILL.md

Use when a user explicitly requests Sepia refactor for minimal in-place prose revision.

sepia-reviewskills/sepia-review/SKILL.md

Use when a user explicitly requests Sepia review to diagnose prose without editing.

sepia-writeskills/sepia-write/SKILL.md

Use when a user explicitly requests Sepia write to create new prose.

Plugin manifests2

.codex-plugin/plugin.json
{
  "name": "sepia",
  "version": "0.10.0",
  "description": "De-AI writing package with the general Sepia router plus five separate operation entries: write, review, refactor, recreate, and hemingway.",
  "skills": "./skills/",
  "license": "MIT",
  "repository": "https://github.com/Nanako0129/sepia",
  "homepage": "https://github.com/Nanako0129/sepia"
}
.claude-plugin/plugin.json
{
  "name": "sepia",
  "version": "0.10.0",
  "description": "De-AI writing package with the general Sepia router plus five separate operation entries: write, review, refactor, recreate, and hemingway.",
  "author": {
    "name": "Nanako Tsai"
  },
  "repository": "https://github.com/Nanako0129/sepia",
  "homepage": "https://github.com/Nanako0129/sepia"
}

For maintainers

If you maintain this plugin, link to this source-backed listing from your README so users can review its manifest and indexed components.

[sepia on Agent Plugins Marketplace](https://pluginsmp.com/plugins/sepia-2)