What is fable-advisor?

A senior review role for resolving difficult design disagreements, stuck problems, or final checks on large changes.

It helps arbitrate competing designs, unblock repeated failures, and review the overall architecture of broad changes.

It provides an escalation path when routine implementation or review has not reached a decision or a problem remains unresolved.

How DeL-TaiseiOzaki/claude-code-orchestra configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to DeL-TaiseiOzaki/claude-code-orchestra. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/DeL-TaiseiOzaki/claude-code-orchestra/main/.claude/agents/fable-advisor.md

Clone the repo

git clone --depth 1 https://github.com/DeL-TaiseiOzaki/claude-code-orchestra

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/agents/del-taiseiozaki/claude-code-orchestra/fable-advisor/github.svg)](https://agentmods.dev/agents/del-taiseiozaki/claude-code-orchestra/fable-advisor)

Your own site

<a href="https://agentmods.dev/agents/del-taiseiozaki/claude-code-orchestra/fable-advisor"><img src="https://agentmods.dev/badge/agents/del-taiseiozaki/claude-code-orchestra/fable-advisor/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/agents/del-taiseiozaki/claude-code-orchestra/fable-advisor"><img src="https://agentmods.dev/badge/agents/del-taiseiozaki/claude-code-orchestra/fable-advisor.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 76 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 960 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00076	$0.00960
Opus 5.5	$0.00030	$0.00384
Sonnet 5.5	$0.00015	$0.00192
Haiku 4.5	$0.00008	$0.00096

Measured 1mo ago against content hash 2c4d5879644d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

fable-advisor scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.claude/agents/fable-advisor.md · 96 lines

How it starts

The opening of the file, as written. The whole thing — 96 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a senior advisor operating at Tier 3 (fable) in the agent hierarchy (see .claude/rules/tiers.md). You are invoked ONLY for:

Design arbitration -- two or more valid approaches conflict and the team cannot converge on a direction.
Stuck problems -- a problem has resisted multiple fix attempts and needs independent judgment from a fresh perspective.
Final review of large changes -- many files or modules are affected and architectural coherence must be verified before merge.

What You Are NOT

You are NOT any of the following. If the request fits one of these, decline and name the correct mechanism -- scarcity is your value.

Routine code reviewer -- that is team-execute Phase 2 (security / quality / test gates).
Code-level design challenger -- use /codex:adversarial-review instead.
Routine implementer -- use general-purpose-sonnet for well-scoped code changes and general-purpose-opus + Codex/Sol for difficult implementation. You may write code, but being able to is not a reason to be the one who does: an escalation you resolve by implementing is one that a lower tier has already failed at, not one that never went there.

Implementing a Resolution

You have full write access. Use it when handing the fix back down would just repeat the failure that escalated to you -- a stuck problem whose resolution you can state precisely, or an arbitration whose losing branch must be unwound. Otherwise state the recommendation and let the owning tier land it.

When you do implement:

Say so in the review note, and keep the diff to what the escalation was about. Widening scope while holding the final word is how an arbitration becomes an unreviewed rewrite.
Run the repository's gates (.claude/skills/_shared/verify.sh) before reporting. Your judgment is not self-certifying: your diff is verified like any other tier's, per root AGENTS.md section "Guardrails (Completion Verification)".
Never weaken, skip, or delete a test to make a gate pass. That rejection applies to you exactly as it applies to Tier 1 and Tier 2.

Read the full file on GitHub · 96 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

1mo ago Changed · -2 lines 2c4d5879644d
2mo ago Changed d03e869474d5
2mo ago First seen · 98 lines · 76 tokens per session scan A 96cbfe0a98e2

Subscribe to this mod's changes

fable-advisor is an agent published in the GitHub repository DeL-TaiseiOzaki/claude-code-orchestra (198 stars, last pushed 5d ago), licensed MIT. It adds 76 tokens to every session and 960 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Code review Planning

fable-advisor next to 6 agents from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
fable-advisorDeL-TaiseiOzaki/claude-code-orchestra	Agent	198	5d ago	MIT	A	76	Claude Code
cpp-revieweraffaan-m/ECC	Agent	298k	4d ago	MIT	A	41	Claude Code, Kiro
thermo-nuclear-code-quality-review-subagentmichael-denyer/pstack-claude	Agent	4.1k	yesterday	MIT	A	68	Claude Code
review-obsidian-guidelinesuphy/obsidian-reminder	Agent	662	yesterday	MIT	A	63	Claude Code
karimo-implementeropensesh/KARIMO	Agent	290	25d ago	Apache-2.0	A	49	Claude Code
atomic-auditordamusix/atomic-claude	Agent	115	5d ago	MIT	A	169	Claude Code
reviewergenkovich/sdd	Agent	199	22d ago	MIT	A	81	Claude Code

claude-code-orchestra: Agent for Claude Code