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prompt-fable

prompt-fable is a skill for Claude Code from antoniocascais/claude-code-toolkit. It costs 91 tokens per session (906 once invoked), scanned A, original, AGPL-3.0.

A prompt-writing skill for preparing instructions to give to Claude Fable 5. It drafts the prompt but does not run the task in Fable.

In plain words
What is it for?
Use it when you need a copy-and-paste prompt for Fable 5, whether for its web app, another session, or a colleague.
Why use it?
It separates preparing clear instructions from sending them to another tool or session.

Skill for Claude Code

Written for Claude Code: argument-hint in frontmatter.

not rated 13repo 3mo ago A scan 91 tokens AGPL-3.0

Good fit Use it when you need a copy-and-paste prompt for Fable 5, whether for its web app, another session, or a colleague.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/antoniocascais/claude-code-toolkit/prompt-fable
View source ↗ antoniocascais/claude-code-toolkit
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add antoniocascais/claude-code-toolkit --skill prompt-fable
Clone the repo
git clone --depth 1 https://github.com/antoniocascais/claude-code-toolkit

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.

agentmods badge for prompt-fable

README.md
[![agentmods](https://agentmods.dev/badge/skills/antoniocascais/claude-code-toolkit/prompt-fable/github.svg)](https://agentmods.dev/skills/antoniocascais/claude-code-toolkit/prompt-fable)
Your own site
<a href="https://agentmods.dev/skills/antoniocascais/claude-code-toolkit/prompt-fable"><img src="https://agentmods.dev/badge/skills/antoniocascais/claude-code-toolkit/prompt-fable/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.

agentmods 80×15 button for prompt-fable

Your own site · 80×15
<a href="https://agentmods.dev/skills/antoniocascais/claude-code-toolkit/prompt-fable"><img src="https://agentmods.dev/badge/skills/antoniocascais/claude-code-toolkit/prompt-fable.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 91 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 906 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 unknown 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00091 $0.00906
Opus 5.5 $0.00036 $0.00362
Sonnet 5.5 $0.00018 $0.00181
Haiku 4.5 $0.00009 $0.00091

Measured 2mo ago against content hash ae874d6f33af, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

prompt-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 2mo 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.

skills/prompt-fable/SKILL.md · 54 lines

The source is not reproduced here

Licensed AGPL-3.0

The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

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.

  1. 2mo ago First seen · 54 lines · 91 tokens per session scan A ae874d6f33af

Subscribe to this mod's changes

prompt-fable is a skill published in the GitHub repository antoniocascais/claude-code-toolkit (13 stars, last pushed 3mo ago), licensed AGPL-3.0. It adds 91 tokens to every session and 906 once invoked, about $0.0004 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.

Data and AIPrompting
Related

prompt-fable compared with skills from other repositories

prompt-fable next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
prompt-fableantoniocascais/claude-code-toolkitSkill133mo agoAGPL-3.0A91Claude Code
llm-app-patternsdavila7/claude-code-templatesSkill33kyesterdayMITA54Claude Code, Codex
prompt-engineerJeffallan/claude-skillsSkill12k7d agoMITA93Claude Code
prompt-optimizationlangwatch/langwatchSkill5.0kyesterdayApache-2.0A105Claude Code, Codex
omh-model-optimizationrlaope/oh-my-hermesSkill5.2kyesterdayMITA84Claude Code, Codex
ideogram4digitalsamba/claude-code-video-toolkitSkill2.5kyesterdayMITA99Claude Code
prompt-library-for-startupsaws/agent-toolkit-for-awsSkill3.4kyesterdayApache-2.0A228Claude Code