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 hamzafarooq/claude-code-starter --skill user-story-writergit clone --depth 1 https://github.com/hamzafarooq/claude-code-starterWrote 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/hamzafarooq/claude-code-starter/user-story-writer)<a href="https://agentmods.dev/skills/hamzafarooq/claude-code-starter/user-story-writer"><img src="https://agentmods.dev/badge/skills/hamzafarooq/claude-code-starter/user-story-writer/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/hamzafarooq/claude-code-starter/user-story-writer"><img src="https://agentmods.dev/badge/skills/hamzafarooq/claude-code-starter/user-story-writer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00032 | $0.00520 |
| Opus 5.5 | $0.00013 | $0.00208 |
| Sonnet 5.5 | $0.00006 | $0.00104 |
| Haiku 4.5 | $0.00003 | $0.00052 |
Grade A, and why
user-story-writer 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.
What it actually says
What this skill does
Take a feature description — it can be rough, even a single bullet point — and produce:
- Primary user story — the one main story that captures the core value
- Supporting user stories — 2-4 sub-stories for the key flows
- Acceptance criteria for each story in Given/When/Then format
- Edge cases to consider — 3-5 scenarios the team should discuss before building
- Open questions — what needs to be answered before sprint planning
Story format
Use this exact format for each story:
**Story [N]:** As a [user type], I want to [do something] so that [I get this value].
**Acceptance Criteria:**
- Given [starting context], when [user takes this action], then [this result happens]
- Given [starting context], when [user takes this action], then [this result happens]
- Given [starting context], when [user takes this action], then [this result happens]
**Priority:** Must-have / Should-have / Nice-to-have
**Effort:** Small (< 1 day) / Medium (2-3 days) / Large (1 week+)
Edge cases section
After the stories, add:
## Edge Cases to Discuss
- [Scenario 1: e.g. "What happens if the user has no data yet?"]
- [Scenario 2: e.g. "What if the export fails mid-way?"]
- [Scenario 3: e.g. "How does this behave on mobile?"]
Open questions section
End with:
## Questions for the Team
1. [Question about scope, ownership, or a missing decision]
2. [Question about a dependency or integration]
3. [Question about edge cases that need a product decision]
How to respond
- Write the stories directly without preamble or explanation
- Keep language simple enough for a non-technical stakeholder to read
- Mark stories with unclear scope as
[NEEDS CLARIFICATION] - If the feature seems too large for one sprint, say so and suggest how to split it
- After delivering the stories, ask: "Want me to add these to docs/prd.md?"
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 First seen · 69 lines · 32 tokens per session scan A f4a178cfdf11
user-story-writer is a skill published in the GitHub repository hamzafarooq/claude-code-starter (145 stars, last pushed 7d ago), licensed MIT. It adds 32 tokens to every session and 520 once invoked, about $0.0001 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 2026-09-03.
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