Update winapp CLI skill for latest winapp CLI capabilities in v0.3.1

[alvinashcraft]

Pull Request Checklist

• I have read and followed the CONTRIBUTING.md guidelines.
• I have read and followed the Guidance for submissions involving paid services.
• My contribution adds a new instruction, prompt, agent, skill, or workflow file in the correct directory.
• The file follows the required naming convention.
• The content is clearly structured and follows the example format.
• I have tested my instructions, prompt, agent, skill, or workflow with GitHub Copilot.
• I have run npm start and verified that README.md is up to date.
• I am targeting the staged branch for this pull request.

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Description

Updating the existing winapp-cli skill to support the features added in winapp CLI up through version 0.3.1. https://github.com/microsoft/winappCli/releases/tag/v0.3.1

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Type of Contribution

• New instruction file.
• New prompt file.
• New agent file.
• New plugin.
• New skill file.
• New agentic workflow.
• Update to existing instruction, prompt, agent, plugin, skill, or workflow.
• Other (please specify):

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Additional Notes

README was also updated with updated description.

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By submitting this pull request, I confirm that my contribution abides by the Code of Conduct and will be licensed under the MIT License.

[github-actions]

⚠️ This PR targets main, but PRs should target staged.

The main branch is auto-published from staged and should not receive direct PRs.
Please close this PR and re-open it against the staged branch.

You can change the base branch using the Edit button at the top of this PR,
or run: gh pr edit 1599 --base staged

[Copilot]

Pull request overview

This PR refreshes the winapp-cli skill to reflect newer winapp CLI capabilities through v0.3.1, so Copilot can better recognize and guide Windows app packaging, debugging, certificate, store, and UI-automation workflows. It also keeps the generated skills index entry aligned with the skill’s updated frontmatter description.

Changes:

• Expanded the winapp-cli skill description and capability list to cover newer commands such as run, unregister, ui, enhanced cert/manifest support, and the npm API.
• Added new command-specific sections for recent winapp features and updated several capability descriptions with version context.
• Updated docs/README.skills.md so the skills catalog reflects the revised winapp-cli metadata.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
skills/winapp-cli/SKILL.md	Updates the skill’s frontmatter and main guidance content to cover newer winapp CLI functionality and usage scenarios.
docs/README.skills.md	Syncs the skills index entry with the updated winapp-cli description from the skill frontmatter.

[alvinashcraft]

PR review comments addressed with new commit.

[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

[github-actions]

🔍 Skill Validator Results

✅ All checks passed

Scope	Checked
Skills	1
Agents	1
Total	2
Severity	Count
---	---:
❌ Errors	0
⚠️ Warnings	0
ℹ️ Advisories	0

Summary

Level	Finding
ℹ️	Found 1 skill(s)
ℹ️	[winapp-cli] 📊 winapp-cli: 2,044 BPE tokens [chars/4: 1,915] (detailed ✓), 8 sections, 7 code blocks
ℹ️	✅ All checks passed (1 skill(s))

Full validator output

```text Found 1 skill(s) [winapp-cli] 📊 winapp-cli: 2,044 BPE tokens [chars/4: 1,915] (detailed ✓), 8 sections, 7 code blocks ✅ All checks passed (1 skill(s)) ```

[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 5 comments.