new skill multi-lang-coder

[jhauga]

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

For full test results ctrl + click support-repo.

• Agent: Local
• Model: GPT-5.4 - Xhigh
• Number of Prompts: 0
• Post Edits: None

Prompt

I filled index.html (link is to index.original.html) with the polygot code needed for the prompt, then ran:

multi-lang-coder #index.html

context = The page will be hosted on GitHub Pages, and built from action `.github/workflows/deploy.yml`.

Results

Great! I mixed-up the code in the script tag, leaving about 25% of it maybe valid JavaScript. The rest a mix of bash, implied Python, and HTML DOM inferences. With that:

• It improved the UI significantly, which at the time of the prompt was - good enough
• The functionality was exactly what I was intending
• The fact that the UI was changed (improved) significantly is controversial, but could easliy be resolved with an extra sentence in the prompt

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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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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]

🔍 Skill Validator Results

⚠️ Warnings or advisories found

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

Summary

Level	Finding
ℹ️	Found 1 skill(s)
ℹ️	[multi-lang-coder] 📊 multi-lang-coder: 1,907 BPE tokens [chars/4: 2,059] (detailed ✓), 11 sections, 0 code blocks
ℹ️	[multi-lang-coder] ⚠ No code blocks — agents perform better with concrete snippets and commands.
ℹ️	✅ All checks passed (1 skill(s))

Full validator output

```text Found 1 skill(s) [multi-lang-coder] 📊 multi-lang-coder: 1,907 BPE tokens [chars/4: 2,059] (detailed ✓), 11 sections, 0 code blocks [multi-lang-coder] ⚠ No code blocks — agents perform better with concrete snippets and commands. ✅ All checks passed (1 skill(s)) ```

[Copilot]

Pull request overview

Adds a new "multi-lang-coder" skill that helps Copilot convert mixed/pseudo/multi-language code into idiomatic code in a chosen target language, and recommend a language when none is set.

Changes:

• Adds skills/multi-lang-coder/SKILL.md with skill frontmatter and content.
• Registers the new skill in docs/README.skills.md.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
skills/multi-lang-coder/SKILL.md	New skill defining phases, gotchas, and examples for polyglot code conversion.
docs/README.skills.md	Adds the new skill to the skills index table.