rennf93/opus-fable-playbook

30 stars · Last commit 2026-07-03

Make Claude Opus 4.8 behave like Claude Fable 5 — doctrine output style, drift-catching hooks, and an eval loop against golden Fable transcripts. Claude Code plugin.

PluginTDD & Testing Documentation DevOps & Infra AI & Prompting

README preview

# fable-mode

[![ci](https://github.com/rennf93/opus-fable-playbook/actions/workflows/ci.yml/badge.svg)](https://github.com/rennf93/opus-fable-playbook/actions/workflows/ci.yml)

Make Claude Opus 4.8 in Claude Code behave as much like Claude Fable 5 as
possible. The doctrine was transcribed by Fable 5 itself; hooks enforce
it at the harness level; an eval loop measures convergence against
golden Fable transcripts. Opus's reasoning depth is weights, not
config — this playbook transplants Fable's *behavior* and catches Opus's
drift mechanically; it does not close the capability gap.

## Quickstart

Run one Opus-as-Fable session right now, no install:

```bash
claude --plugin-dir /path/to/opus-fable-playbook \
  --settings /path/to/opus-fable-playbook/profiles/opus-fable.settings.json
```

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