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Get Started Free →fcakyon/fable-advisor
This skill should be used when the user asks for a "Fable second opinion", wants to "check a plan before committing", needs another view after repeated failures, or explicitly invokes "fable-advisor".
Passed 14 of 19 test cases with the skill, and 7 of 19 without it.
and 9 more in the full report
10 fixed6 passed either way4 still failing2 broke
Tokens, turns and time describe resource use, not a dollar price.
This benchmark measured an earlier version of the skill.
A newer attempt on gemini-3.6-flash on 10/2/2026 did not produce a publishable comparison (not comparable). The snapshot above is the previously measured run.
One of 10 test cases the skill fixed. Same model, same prompt, with and without the skill.
From which working directory location must `node scripts/ask_fable.mjs` be executed when invoking the Fable review script?
| Checked | Without skill | With skill |
|---|---|---|
| The response specifies running from the skill's directory. | Missed | Passed |
The instructions your model reads when the skill loads.
Get a focused second opinion from Claude Fable 5.1 without substituting the host tool's model.
In Claude Code, delegate to the native fable-advisor agent. Do not launch
another Claude Code process.
Elsewhere, run this exact shape from this skill's directory so the request reaches standard input:
node scripts/ask_fable.mjs <<'REVIEW'
the review request
REVIEW
State the decision, the evidence behind it, and any constraint that changes the verdict. Name the paths that matter: the reviewer has read-only access and checks load-bearing claims itself.
Return Fable's answer without rewriting it. If claude is missing or
unauthenticated, surface the error and ask the user to install it or sign in.
Never review in its place.
test cases passed, vs 7 / 19 without
Published skills whose descriptions closely match this one, with their headline benchmark lift.
More skills from the same source and nearby in the registry, with their headline benchmark lift.