sepia

Overview of sepia

What it is

Sepia is a portable Agent Skill for de-AI writing. It repairs narrative architecture in fiction and applies venue-matched rules to professional documents. The skill is based on StoryScope (arXiv:2604.03136) and can be loaded by any agent that speaks the standard Agent Skills protocol. The Skills CLI supports 77+ agents and installs sepia with one command. Native plugin packages exist for Claude Code, Codex, Grok Build, Antigravity, and QwenPaw.

Key features

• Four operations: write, review (diagnose only), refactor (minimal edits), recreate (full rewrite).
• Three-pass protocol for fiction: narrative architecture, discourse flow, surface style.
• Professional document rules for release notes, PR replies, postmortems, tickets, technical articles, and long-form journalism.
• Per-model fingerprints for narrative and sentence-level layers (Claude, GPT, Gemini, DeepSeek, Kimi).
• Built-in Hemingway voice profile for fiction and professional prose.
• Voice-skills interface for stacking external voice or style skills (opt-in).

Use cases

• Writing or revising fiction with narrative-architecture repair.
• Creating professional documents that match their venue: release notes, PR/issue replies, postmortems, tickets, technical articles, long-form journalism.
• Reviewing existing text to diagnose AI tells without editing.
• Refactoring or recreating prose from source facts and intent.

Getting started

See the repository README for installation instructions.

License and pricing

MIT License. Open source.

Based on the project's public README and repository metadata.