sam-fable-advisor

name	sam-fable-advisor
description	Consult Claude Fable as a read-only advisor for a focused assumption, tradeoff, architecture question, security concern, difficult diagnosis, or high-risk decision. Use when the user requests a Fable second opinion or when another AI agent needs a bounded independent advisory pass; default effort to high unless the user explicitly supplies an effort.

Sam Fable Advisor

Obtain one independent advisory answer. Keep the calling agent responsible for the final decision, implementation, and proof.

Non-Negotiable Contract

• Use Claude model alias fable exactly. Do not substitute another model.
• Use effort high unless the user explicitly supplies low, medium, high, xhigh, or max; use the supplied value exactly.
• Do not infer a lower effort from urgency, simplicity, cost, or latency.
• Run the advisor read-only with plan permissions and no session persistence.
• Permit only Read, Glob, and Grep tools. Do not let it edit files, run shell commands, spawn subagents, publish, commit, push, or perform external writes.
• Ask one focused question. Do not delegate the whole task or request implementation.
• Pass only the minimum context required and exclude secrets or credentials.
• Do not silently fall back when the CLI, model, effort, or authentication is unavailable.
• Treat the advisor response as analysis, not proof. Verify material claims before acting.

1. Freeze the Advisory Request

Record:

• Focused question or decision.
• Relevant facts and evidence.
• Constraints and no-go surfaces.
• Current hypothesis, if any.
• Desired output: recommendation, risks, and strongest verification path.

If the request contains an explicit effort, preserve it. Otherwise select high. Do not treat words such as “deep”, “quick”, or “careful” as effort values.

2. Resolve the Invocation

Run the deterministic resolver before invoking the advisor:

SAM_FABLE_ADVISOR_DIR="<absolute directory containing this SKILL.md>"
python3 "$SAM_FABLE_ADVISOR_DIR/scripts/resolve_advisor.py"
python3 "$SAM_FABLE_ADVISOR_DIR/scripts/resolve_advisor.py" --effort high

Use the first form when effort is absent. Use the second form with the user's exact effort when supplied. The resolver returns an argv array fixed to Claude Fable, the selected effort, plan permission mode, read-only tools, JSON output, and disabled session persistence.

3. Invoke Safely

Execute the returned argv directly without a shell. Send the advisory request through stdin because claude --print reads piped text when no prompt argument is supplied. Do not interpolate the question into a command string or expose it in process arguments.

Require the advisor prompt to say:

• Act only as an advisor.
• Do not edit files, run shell commands, or spawn subagents.
• Answer the focused question.
• Return a recommendation, key risks, hard assumptions, and verification path.
• Separate confirmed evidence from inference.

Wait for completion and parse the JSON result. If invocation fails, return the exact blocker and do not retry with another model or effort.

4. Reconcile

Check the response against supplied evidence. Reject unsupported claims, scope expansion, invented facts, and implementation work. Resolve disagreement using direct evidence or present the tradeoff to the user; do not defer blindly.

Output

Return:

• Advisor: Claude Fable.
• Effort: selected effort and whether it was defaulted or user-specified.
• Recommendation: concise advisory conclusion.
• Risks: material risks and hard assumptions.
• Verification: strongest next proof.
• Caller decision: accepted, rejected, or unresolved, with reason.

Do not claim the advisor ran unless the invocation completed successfully.