# Project Standart Usecases

> Designing use cases and user flows with PRD traceability Use when this capability is needed.

- Skill: `tomevault-io/project-standart-usecases` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add tomevault-io/project-standart-usecases`
- Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/project-standart-usecases/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Product & Planning
- Author: tomevault-io (https://skillmd.com/u/tomevault-io)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/tomevault-io/project-standart-usecases

---


<purpose>
  <item>Describe key user scenarios in an executable and testable form</item>
  <item>Prepare a foundation for architecture and epic/task breakdown</item>
</purpose>

<when_to_use>
  <item importance="critical">After PRD and personas are finalized, before epics/tasks</item>
  <item importance="high">When flow alignment and behavior edge conditions matter</item>
</when_to_use>

<required_preload>
  <item>shared-base-rules</item>
  <item>shared-docs-paths</item>
  <item>planning-requirements-extraction</item>
  <item>planning-testing-strategy</item>
</required_preload>

<document_target>
  <rule importance="critical">Create/update files in `use-cases/{use case key}-{use case number}-{user friendly name}.md`</rule>
</document_target>

<method>
  <step>Define primary actor, preconditions, main flow, alternate flow, and failure flow</step>
  <step>Map each use case to requirements and AC from PRD</step>
  <step>Identify input/output data and integration points</step>
  <step>Capture validation signals for scenario testing</step>
</method>

<output_format>
  <section>Use case goal</section>
  <section>Actors and preconditions</section>
  <section>Main flow</section>
  <section>Alternate and error flows</section>
  <section>PRD / AC traceability</section>
  <section>Validation signals</section>
</output_format>

<quality_rules>
  <rule importance="critical">Every scenario has a clear expected outcome</rule>
  <rule importance="high">Scenarios cover critical errors and deviations</rule>
  <rule importance="high">Bi-directional traceability exists: use case -> PRD AC</rule>
</quality_rules>

---
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<!-- tomevault:4.0:skill_md:2026-04-11 -->