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.
npx skills add Gerg/ai_agent_skills --skill story-writinggit clone --depth 1 https://github.com/Gerg/ai_agent_skillsWrote 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/gerg/ai_agent_skills/story-writing)<a href="https://agentmods.dev/skills/gerg/ai_agent_skills/story-writing"><img src="https://agentmods.dev/badge/skills/gerg/ai_agent_skills/story-writing/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.
<a href="https://agentmods.dev/skills/gerg/ai_agent_skills/story-writing"><img src="https://agentmods.dev/badge/skills/gerg/ai_agent_skills/story-writing.svg" alt="Reviewed on agentmods" width="80" 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 | $0.02251 |
| Opus 5 | $0.00032 | $0.01125 |
| Sonnet 5 | $0.00013 | $0.00450 |
| Haiku 4.5 | $0.00006 | $0.00225 |
Grade A, and why
story-writing 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 11d 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 — 324 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Story Writing
A comprehensive guide for writing well-structured user stories.
When using this skill, begin by stating: "I'm using the story-writing skill to write well-structured user stories with Given/When/Then acceptance criteria."
Using This Skill
This skill provides universal principles for story writing. For tracker or domain-specific guidance, see the references below.
Tracker-specific formatting:
- Jira: See references/jira-markup.md for Jira-specific markup and formatting
Domain-specific patterns:
- Cloud Foundry API: See references/cloud-foundry-api.md for CAPI story patterns
- Cloud Foundry CLI: See references/cloud-foundry-cli.md for CF CLI story patterns
Core Principles
- Stories should be small and atomic - Focus on a single feature or capability
- Use Given/When/Then structure - Makes acceptance criteria testable and clear
- Focus on external, user-facing behavior - Implementation details belong in notes
- Reference prior art - Build on existing patterns for consistency
- Be specific and concrete - Use testable actions and observable outcomes
- Avoid coupling stories - Each story should stand alone when possible
- Build incrementally - Complex features emerge across multiple stories
Story Structure
Essential Sections
- Title - Brief, descriptive summary
- Metadata - Status, Type, Priority, Epic/Parent
- Summary - One-line description
- Description containing:
- High-level context (optional)
- Requirements or constraints (optional)
- Acceptance Criteria
- Implementation notes
- Links to prior art and related work
- Labels/Tags - For categorization and filtering
Flexibility
- Simple stories may start with high-level Given/When/Then
- Complex stories may lead with requirements section
- Structure varies based on story complexity and team conventions
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.
- 11d ago First seen · 324 lines · 65 tokens per session scan A 392caee8a212
story-writing is a skill published in the GitHub repository Gerg/ai_agent_skills (2 stars, last pushed 2mo ago), licensed MIT. It adds 65 tokens to every session and 2,251 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 2026-08-31.
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