claudeers.
// Claude Skills

fable-orchestration-5.1

Claude Code skill: Fable 5.1 decides, Opus 5 / Sonnet 5 / Haiku 4.5 execute. Five wiring patterns (advisor, architect+delegate, agent teams, workflows, /goal…

Actively maintained
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last commit 28 days ago
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Install with your AI

Paste into Claude Code, Cursor, or any agent — it reads the repo and wires the tool into your project.

Install and set up fable-orchestration-5.1 (claude-plugin project) into my current project.
Found on https://claudeers.com/fable-orchestration-51
Repo: https://github.com/y0f/fable-orchestration-5.1
Homepage/docs: —
Detected install method: claude-plugin → /plugin install fable-orchestration-5-1@y0f/fable-orchestration-5.1
Category: skills. Platforms: cli.
Read the repo's README for exact setup and env vars, then install it and wire it into my project.

Claudeers Health Verdict:
active; community-verified: false. Confirm the source before running anything.
// or install directly (claude-plugin)
/plugin marketplace add y0f/fable-orchestration-5.1
/plugin install fable-orchestration-5-1@y0f/fable-orchestration-5.1
// or clone
git clone https://github.com/y0f/fable-orchestration-5.1

// compatibility

Platformscli
Operating systems—
AI compatibilityclaude
LicenseMIT
Pricingopen-source
LanguageShell

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fable-orchestration

Fable 5.1 decides. Opus 5 builds. Sonnet 5 grinds. Haiku scouts.
Claude Code plugin. Pay Fable rate for judgment only.

flowchart LR
    U([task]) --> F

    subgraph FABLE["Fable 5.1 · $10 / $50"]
        F[architect<br/>plan · decide · judge]
    end

    F -. spawn async .-> B & W & S
    B & W & S -- result --> F
    F -. verify .-> V
    V -- PASS / FAIL + evidence --> F
    F --> D([done])

    subgraph LANES["cheap lanes"]
        B[opus-builder<br/>$5 / $25]
        W[sonnet-worker<br/>$2 / $10]
        S[haiku-scout<br/>$1 / $5]
        V[fresh-verifier<br/>Opus, clean context]
    end

    classDef fable fill:#8A2BE2,color:#fff,stroke:none
    classDef lane fill:#2b2d42,color:#fff,stroke:none
    classDef io fill:#edf2f4,color:#2b2d42,stroke:#8d99ae
    class F fable
    class B,W,S,V lane
    class U,D io

Install

Inside Claude Code:

/plugin marketplace add y0f/fable-orchestration-5.1
/plugin install fable-orchestration@fable-orchestration

Then merge settings/settings.example.json (this repo, or the installed copy under ~/.claude/plugins/marketplaces/fable-orchestration/settings/) into ~/.claude/settings.json. Run /model fable per session when the task warrants it. Agents appear as fable-orchestration:opus-builder etc.

Pick wiring

flowchart TD
    Q1{unattended,<br/>checkable end state?} -- yes --> G["/goal &lt;check&gt; on top of the pattern below"]
    Q1 -- no --> Q2
    G --> Q2{same step over<br/>many files?}
    Q2 -- yes --> WF["workflow<br/><i>use a workflow to …</i>"]
    Q2 -- no --> Q3{peers must argue<br/>or own layers?}
    Q3 -- yes --> AT["agent teams<br/>Fable lead · Sonnet peers"]
    Q3 -- no --> Q4{few decisions,<br/>short session, /clear often?}
    Q4 -- yes --> AD["advisor mode<br/>/model sonnet · /advisor fable"]
    Q4 -- no --> AR["architect + delegate<br/>/model fable · lanes build"]

    classDef q fill:#edf2f4,color:#2b2d42,stroke:#8d99ae
    classDef a fill:#8A2BE2,color:#fff,stroke:none
    class Q1,Q2,Q3,Q4 q
    class G,WF,AT,AD,AR a

Advisor re-reads the whole transcript uncached at $10/MTok per consult. Architect reads its own context from cache at $0.25. Cost table in wiring.md.

Layout

PathWhat
skills/fable-orchestration/SKILL.mdLoads on trigger. Lanes, wiring, effort, cost levers, traps, checklist.
reference/models.mdFacts with sources. Pricing, advisor pairings, 5.1 vs 5 deltas.
reference/wiring.mdConfigs for all five patterns. Frontmatter, env, limits, cost table.
reference/prompt-kit.md16 paste-in blocks for 5.1, each marked whether Claude Code's Fable system prompt already carries it (checked live). Old-prompt patterns to delete.
reference/failure-modes.mdSymptom → cause → fix.
agents/Five lanes, pinned model + effort + tools.
settings/settings.json examples, CLAUDE.md routing block.
bench/run.sh: same task on Fable solo, Opus solo, and orchestrated, 3 runs each, median reported. task-parallel.md is the shape orchestration claims to win; task-small.md the shape it should lose.

Four traps

  • Cyber-flagged prompt → session falls back to Opus 4.8 (one transcript notice, then stays there). Bio → Opus 5. claude --safe-mode finds the trigger.
  • Unpinned subagents inherit Fable. CLAUDE_CODE_SUBAGENT_MODEL=opus.
  • Subagent cache is 5 min. subagentPromptCacheTtl: "1h".
  • A fork subagent inherits Fable and the whole transcript, ignoring CLAUDE_CODE_SUBAGENT_MODEL. Spawn a named lane instead.

MIT. Each claim is attributed in models.md: Claude Code docs, the Anthropic announcement, or Anthropic's bundled Fable 5.1 migration guidance.

// faq

What is fable-orchestration-5.1?

Claude Code skill: Fable 5.1 decides, Opus 5 / Sonnet 5 / Haiku 4.5 execute. Five wiring patterns (advisor, architect+delegate, agent teams, workflows, /goal), effort routing, fallback traps, 16-block prompt kit, pinned agent lanes.. It is open-source on GitHub.

Is fable-orchestration-5.1 free to use?

fable-orchestration-5.1 is open-source under the MIT license, so it is free to use.

What category does fable-orchestration-5.1 belong to?

fable-orchestration-5.1 is listed under skills in the Claudeers registry of Claude-compatible tools.

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updated 22 days ago

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