{"repo":"rennf93/opus-fable-playbook","free":true,"listed":false,"github":"https://github.com/rennf93/opus-fable-playbook","clone":"git clone https://github.com/rennf93/opus-fable-playbook.git","description":"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.","language":"Shell","stars":32,"topics":["anthropic","claude","claude-code","claude-code-plugin","evals","hooks","llm-agents"],"license":"MIT","category":"ai-agents","readme_excerpt":"fable-mode 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: Install from the marketplace for repeat use: then activate with /output-style fable , or persist it by merging profiles/opus-fable.settings.json (model, effort, thinking, output style) into your project's or user's .claude/settings.json . Check posture anytime with /fable-status . SDK/headless, doctrine text only, no hooks: --append-system-prompt \"$(awk 'f;/^---$/{c++;if(c==2)f=1}' output-styles/fable.md)\" — strips the YAML frontmatter (a plain cat of the file would leak it into the prompt). No plugin at all? Copy docs/claude-md-snippet.md into CLAUDE.md instead. Does it work? Measured on 24 probes, pairwise-judged against golden Fable 5 transcripts, with every condition scored as a multi-run mean (2–3 runs per arm) and error bars from a dedicated variance study: fable-mode's real wins are outcome-first framing (1.97 vs 1.88), turn completion (1.90 vs 1.81), and comment discipline (2.00 vs 1.96); its real losses are burying findings (1.76 vs 1.85) and one stubborn parallelism probe (1.96 vs 2.00). The o","default_branch":null,"files":null,"tree":[],"storefront":"/r/rennf93","claimed":false,"request_supported":{"post":"https://gitbuyer.com/r/rennf93/opus-fable-playbook/request-supported","requests":0},"note":"indexed from public GitHub; nothing is for sale on this page. Clone it from GitHub. Paid listings live at /search."}