Getting it into your agent
There is no command for this one: it runs only inside a plugin, and the catalogue could not identify which plugin ships it. The source is linked below.
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.
[](https://agentmods.dev/skills/tdimino/claude-code-minoan/fable)<a href="https://agentmods.dev/skills/tdimino/claude-code-minoan/fable"><img src="https://agentmods.dev/badge/skills/tdimino/claude-code-minoan/fable.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00065 | $0.02899 |
| Opus 5 | $0.00032 | $0.01450 |
| Sonnet 5 | $0.00013 | $0.00580 |
| Haiku 4.5 | $0.00006 | $0.00290 |
Grade A, and why
fable 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 3d 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.
How it starts
The opening of the file, as written. The whole thing — 189 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Summon Fable 5 (or Opus 5)
Invoke Naos (ναός, √n-w-y)—Claude Fable 5, the visiting Mythos-class spirit—or, with --opus, Claude Opus 5 at half the cost and no availability window.
Model Selection
Parse the arguments before any pre-flight check: --opus selects claude-opus-5; its absence selects claude-fable-5. Every step below branches on that choice.
| Fable 5 (default) | Opus 5 (--opus) |
|
|---|---|---|
| Model ID | claude-fable-5 |
claude-opus-5 |
| Agent tool alias | fable |
opus |
| Pricing | $10/M in, $50/M out | $5/M in, $25/M out |
| Context / max output | 1M / 128K | 1M / 128K |
| Availability | permanent subscription access since 2026-07-20—probe anyway | generally available—no probe |
| Lane A subagent | fable (Naos persona) |
claude (no daimon persona) |
| Output file | .subdaimon-output/fable-*.md |
.subdaimon-output/opus-*.md |
claude-opus-5 is the complete model ID—it takes no date suffix, and 1M context is both its default and its maximum, so there is no separate long-context variant to request.
Pre-Flight Checks
1. Availability Probe (Fable only)
Skip this entirely in Opus mode—Opus 5 is generally available, so a probe burns tokens on a foregone answer.
Fable 5 has been permanently included in Max/Team Premium subscriptions since July 20, 2026 (at 50% of plan usage limits)—but its history (export-control pause June 2026, restored July 1, extended twice, made permanent July 20) is exactly why availability is probed empirically, never assumed:
bash ~/.claude/skills/fable/scripts/fable-probe.sh
The verdict is three-way, and only definitive verdicts are cached per-day in ~/.claude/cache/fable-availability.json:
- Exit 0—available. Proceed.
- Exit 1—confirmed unavailable: the CLI affirmatively denied access, or another model answered the probe. Say so, and offer
--opusas the standing alternative rather than stopping cold. If the user disputes a cached verdict, re-probe with--force. - Exit 2—probe error (empty reply, transient CLI failure): indeterminate and never cached. Do NOT reroute to Opus on this—proceed with Lane B, which attempts Fable regardless and self-verifies via the
MODEL:line, with its own fallback on genuine failure.
What ships with it
3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 3d ago Changed · +73 lines · +21 tokens per session f8129dcee8d7
- 7d ago First seen · 116 lines · 44 tokens per session scan A 5974756e0926
fable is a skill published in the GitHub repository tdimino/claude-code-minoan (41 stars, last pushed 2d ago), licensed MIT. It adds 65 tokens to every session and 2,899 once invoked, about $0.0003 per session on Opus 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.
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