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 hamzabellouch/agent-skills --skill user-story-mapping-backloggit clone --depth 1 https://github.com/hamzabellouch/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/hamzabellouch/agent-skills/user-story-mapping-backlog)<a href="https://agentmods.dev/skills/hamzabellouch/agent-skills/user-story-mapping-backlog"><img src="https://agentmods.dev/badge/skills/hamzabellouch/agent-skills/user-story-mapping-backlog/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/hamzabellouch/agent-skills/user-story-mapping-backlog"><img src="https://agentmods.dev/badge/skills/hamzabellouch/agent-skills/user-story-mapping-backlog.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 | $0.00070 | $0.00968 |
| Opus 5.5 | $0.00028 | $0.00387 |
| Sonnet 5.5 | $0.00014 | $0.00194 |
| Haiku 4.5 | $0.00007 | $0.00097 |
Grade A, and why
user-story-mapping-backlog 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 7d 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 — 91 lines — stays where its author put it; the contents beside it link to each section on GitHub.
User Story Mapping & Backlog Refinement Skill Guide
This skill governs the breakdown of high-level feature initiatives into vertically sliced, testable user stories with rigorous acceptance criteria.
1. User Story Mapping Visual Framework
[ Backbone / Activities ] (Discover) --> (Configure) --> (Checkout)
| | |
[ Walking Skeleton (Release 1) ] |-- Browse Catalog |-- Select Variant |-- Pay via Card
| | |
[ Enhancements (Release 2) ] |-- Filter by Price |-- Add Custom Text |-- Apple / Google Pay
| | |
[ Future Scope (Release 3) ] |-- AI Recommendations |-- 3D Preview AR |-- Split Payment
2. Production User Story Format & Gherkin Criteria
A. INVEST-Compliant Story Definition
- Independent: Can be developed and deployed without hard blockers from other stories.
- Negotiable: Focuses on the essence of the problem, allowing implementation flexibility.
- Valuable: Delivers demonstrable value to the end user or business.
- Estimable: Scoped small enough to be sized with reasonable engineering confidence.
- Small: Fits comfortably within a single sprint iteration (1 to 3 days of dev time).
- Testable: Has unambiguous acceptance criteria with binary pass/fail verification.
B. Production Story Example with Gherkin BDD
### US-402: Automatic Retry on Transient Payment Gateway Failures
**As a** customer making an online purchase,
**I want** the payment service to automatically retry temporary network interruptions with Stripe,
**So that** my transaction does not fail due to momentary carrier or network drops.
---
#### Technical Scope & Acceptance Criteria (Gherkin BDD)
```gherkin
Feature: Payment Gateway Transient Failure Retries
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.
- 7d ago First seen · 91 lines · 70 tokens per session scan A 550122b271d1
user-story-mapping-backlog is a skill published in the GitHub repository hamzabellouch/agent-skills (8 stars, last pushed today), licensed MIT. It adds 70 tokens to every session and 968 once invoked, about $0.0003 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 2026-10-10.
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