yamadashy Consult Fable
Ask Fable — the frontier tier above Opus — for judgment. This is a consultation,
not a delegation: Fable reads and advises, it does not edit. For implementation
hand-offs, use claude-exec instead.
When to use
- A design decision with real trade-offs, where you want a frontier-tier verdict.
- A debugging dead end: present the symptoms and your hypotheses, ask what you're missing.
- A close review call (ship or hold, is this finding real, is this API shape right).
Not for lookups, mechanical work, or anything a cheaper model answers just as well — Fable is the most expensive tier (a trivial round trip already costs ~$0.5).
How to run
If you are running inside Claude Code (the Agent/Task tool is available):
spawn one subagent with model: "fable" and the consultation question as its
prompt. No CLI round trip needed.
Otherwise (Codex, other harnesses, plain shell): call the Claude Code CLI. Read-only tools (Read, Grep, Glob) stay available, so Fable can inspect the code it is advising on — name the relevant paths in the prompt.
claude -p --no-session-persistence --model fable --permission-mode default \
--disallowedTools Bash,Edit,Write -- "<question>"
For long prompts, pipe via stdin and omit the prompt argument:
echo "<long question>" | claude -p --no-session-persistence --model fable \
--permission-mode default --disallowedTools Bash,Edit,Write
Writing the question
Context is not carried over — the prompt must stand alone, in either mode:
- Background: what is being built, and the constraints that matter.
- The question: one decision, stated precisely.
- The options considered, with your current lean and why.
- Ask for a recommendation with reasoning, and what evidence would change it.
Notes
- One consultation per decision. If the answer raises a follow-up, fold it into a single second round — don't turn Fable into a chat partner.
- CLI mode: leave
--effortat its default (deep reasoning is the point) and set a generous timeout (up to 10 minutes:timeout: 600000). - The reply is advice, not an order. Weigh it against what you know, decide, and tell the user what Fable said and which parts you adopted.