tarunlnmiit/fable-mode/fable

/fable — fable mode control

Fable mode is an always-on ruleset (injected by this plugin's SessionStart hook) that makes whichever Claude model is running behave like Fable. It targets the five reliable failure modes of smaller models:

1. Verbose preamble → lead with the outcome, no filler or narration (§1)
2. Missed scope → enumerate what "done" includes, trace blast radius, re-read the request before declaring done (§2)
3. Asking instead of acting → act on reversible work; ask only for destructive, outward-facing, or scope-changing actions (§3)
4. Over-engineering → exactly what was asked, simplest solution that works (§4)
5. False confidence → never claim tested/done without running it; read instead of guessing (§5)

Plus §6: on Haiku/Sonnet, offer to consult a stronger model (Fable, or Opus if Fable is unavailable on the plan) at high-leverage moments.

When invoked

• `/fable` or "what is fable mode" — summarize the five failure modes above in a few sentences and confirm whether the ruleset is active (it is active if "FABLE MODE ACTIVE" appeared in session-start context).
• "fable status" — report active/inactive and which model is currently running.
• "stop fable mode" / "fable off" — acknowledge in one line, then stop applying the ruleset for the rest of the session (or until re-enabled). There is no state file; this is a conversational toggle.
• "fable on" — resume applying the ruleset immediately.

Repo: https://github.com/tarunlnmiit/fable-mode