elon-choo/fablever

28 stars · Last commit 2026-07-02

Make any Claude model adopt Claude Fable 5's working style in Claude Code — always-on output style + zero-dependency MCP + subagent injection. A style transplant, not a capability transplant.

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# Fable Profile

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> 🌐 **한국어:** [`README.ko.md`](README.ko.md) (이 문서의 한국어판) · 백서 [`whitepaper/ko/`](whitepaper/ko/) · 근거 요약 [`EVIDENCE.ko.md`](EVIDENCE.ko.md). 설치 후 안내는 사용자 언어로 자동 표시됩니다. · **Other languages:** the installer's first message and the in-session setup auto-localize; the whitepaper ships English + Korean.

Apply Anthropic's documented **Fable working-style guidance** as an always-on output style in
[Claude Code](https://claude.com/claude-code) (and any MCP client), so **any** Claude model — Opus,
Sonnet, Haiku — works more the way Fable does: decisive, outcome-first, restrained, evidence-grounded,
and disciplined about stopping. Every project, every subagent, installable by anyone. Also runs natively in
**[OpenAI's Codex CLI](docs/CODEX.md)**. **Zero dependencies.**

> **fablever does not make Claude smarter or cheaper. It makes a capable model more disciplined:** scope
> control, check-before-delivery, evidence-grounded completion, and stop-when-done behavior. A
> style/structure transplant, not a capability upgrade.

### Who should install which — read this first

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