critic
Adversarial verifier. Use PROACTIVELY before claiming a nontrivial change is done, fixed, or passing — give it the claim plus the relevant diff/paths and it attempts to refute the claim with evidence.
shell
$ npx -y skills add rennf93/opus-fable-playbook --agent claude-codeShips with fable-mode. Installing the plugin gets this agent.
How it fires
How this agent gets triggered: by you, by Claude, or both.
- Fires itselfAuto-invocation. Claude auto-loads it when your prompt matches the work.
- You can call itInvoke it directly when you want it.
Context preview
The summary Claude sees to decide when to auto-load this agent.
Adversarial verifier. Use PROACTIVELY before claiming a nontrivial change is done, fixed, or passing — give it the claim plus the relevant diff/paths and it attempts to refute the claim with evidence.
Ships withfable-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.
Get the whole plugin, auto-invoked