Agent skill · ma08
claude-fable-advisor
Use Anthropic Claude Fable 5 through Claude Code as a subscription-backed external advisor, reviewer, or planner for Codex work. Use when the user asks for Fable, Claude Fable, a Claude advisor/reviewer/planner, a second-model critique, hard planning review, architecture review, debugging strategy review, adversarial completion check, or an Oracle-like consultation that must avoid Bedrock, API keys, and other usage-based routes.
What it needs
About 4k tokens when loaded.
What this skill does
Claude Fable Advisor Use Claude Code to ask Fable 5 for an external opinion only after proving the Claude process is using first-party claude.ai subscription auth. Treat Fable's answer as advisory; verify it against local code, tests, docs, and user intent. Route Rule Never run a Fable request through Bedrock, Vertex, Foundry, Claude Platform on AWS, ANTHROPICAPIKEY, ANTHROPICAUTHTOKEN, ANTHROPICBASEURL, or claude auth login --console. Before every live request, use scripts/runfableadvisor.py. The script: strips known provider/API billing variables from the child environment; runs Claude in safe mode with an explicit empty strict MCP configuration; strips common cloud, GitHub, and app credential environment variables from tool-enabled runs unless --inherit-credentials is explicitly supplied; runs claude auth status --json; loads a runner-only long-lived subscription token from $BOTFILESROOT/secrets/local/claude-fable-oauth-token when present, without exporting it to ordinary Claude Code sessions; refuses unless the status shows loggedIn=true, apiProvider=firstParty, and either a paid claude.ai stored login or an oauthtoken credential loaded from the runner-only subscription token source; runs claude --model fable --effort max -p ... only after the gate passes; disables Claude tools by default and writes reusable output artifacts; provides --read-only-review for credential-stripped repository inspection with Read, Glob, Grep, and narrowly pre-approved read-only Git commands; can opt into all default tools with --with-tools, a bounded allowlist with --tools "Read,Bash", and full permission bypass with --yolo. Do not use claude --bare for this workflow. Bare mode skips OAuth/keychain subscription auth and expects API-key or third-party-provider credentials. Workflow 1. Decide whether Fable is worth the quota. Use it for hard planning, design tradeoffs, proof/logic review, stuck debugging, final risk review, or an independent critique. …
How to use it
Reference it in AdaL, Claude Code, Cursor or any coding agent — nothing to install:
@skills ma08/claude-fable-advisor