What is sepia?
sepia is a Claude skill by Nanako0129 that de-AI writing skill fixing narrative structure before word choice. It is listed under Docs & writing and has 3,221 GitHub stars.
| Type | Claude skill |
|---|---|
| Author | Nanako0129 |
| Repository | Nanako0129/sepia |
| Popularity | 3,221 GitHub stars |
| Category | Docs & writing |
| Security | Low risk (100/100) |
| Rank | #455 of 1,262 Claude skills; #33 in Docs & writing |
| SKILL.md length | 72 lines |
| License | MIT |
| Last commit | 2026-10-15 |
| Stars this week | +136 |
Is sepia safe to install?
sepia scores 100/100 on the MCPMods security check: Low risk. No checks raised a concern. It passed 9 of 9 checks.
Skill results come from a static scan of its SKILL.md for instruction overrides, hidden actions, risky commands and credential access.
| Check | Result |
|---|---|
| No instruction-override phrases | Pass |
| No hidden actions | Pass |
| No pipe-to-shell installers | Pass |
| No obfuscated code | Pass |
| No destructive commands | Pass |
| Doesn't ask for keys or credentials | Pass |
| No network requests | Pass |
| No shell commands | Pass |
| Installs no packages | Pass |
How do I install sepia?
- Install with the skills CLI. Works for Claude Code and other agents that read skills.
npx skills add https://github.com/Nanako0129/sepia --skill sepia
- Or copy it by hand. Claude Code loads any folder with a SKILL.md from ~/.claude/skills.
git clone https://github.com/Nanako0129/sepia cp -r sepia/skills/sepia ~/.claude/skills/sepia
- Use it. Claude loads the skill when a task matches its description. You can also name it in your prompt.
Use the sepia skill to …
Or ask Claude to set it up
Paste this into Claude Code and it installs sepia for you:
Install the "sepia" skill from https://github.com/Nanako0129/sepia/tree/main/skills/sepia into ~/.claude/skills, then tell me in one line what it does.