[DXUI]: Adjust creating-stories Agent Skill to ensure WC toolkit is used when it needs to be

[fbeaudoincoveo]

Task Description

Use the PromptEngineer agent to extract and metabolize pattern from #6997 into the creating-skills Agent Skill.

Acceptance Criteria

• The creating-stories Agent Skill has been modified to include the correct patterns

Technical Notes

In order to avoid conflicts, this should ideally be done after #6972 has been merged.

Jira Ticket

No response