Add Bilig WorkPaper skill

[gregkonush]

Summary

• Adds a bilig-workpaper agent skill for formula-backed spreadsheet workflows using @bilig/headless and its MCP server
• Documents when to use WorkPaper instead of browser/Excel UI automation
• Adds the required read/edit/recalculate/readback/persist verification loop for agent work
• Regenerates docs/README.skills.md so the skill appears in the install table

Validation

• npm ci
• npm run skill:validate
• npm run build
• bash eng/fix-line-endings.sh was run locally; on macOS it emitted BSD sed warnings while exiting 0, and the touched files were separately verified as LF

[github-actions]

🔴 Contributor Reputation Check: HIGH risk

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Profile	HIGH
Credential audit	NONE

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[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	[bilig-workpaper] 📊 bilig-workpaper: 983 BPE tokens [chars/4: 1,037] (detailed ✓), 7 sections, 2 code blocks
ℹ️	✅ All checks passed (1 skill(s))

Full validator output

```text Found 1 skill(s) [bilig-workpaper] 📊 bilig-workpaper: 983 BPE tokens [chars/4: 1,037] (detailed ✓), 7 sections, 2 code blocks ✅ All checks passed (1 skill(s)) ```

[Copilot]

Pull request overview

Adds a new bilig-workpaper agent skill that documents how agents should use the @bilig/headless WorkPaper library and its MCP server for formula-backed spreadsheet workflows, and registers the skill in the install index.

Changes:

• Adds skills/bilig-workpaper/SKILL.md with usage guidance, MCP setup, verification loop, and a TypeScript API example.
• Inserts the new skill into the alphabetized table 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/bilig-workpaper/SKILL.md	New SKILL.md defining the bilig-workpaper agent skill, with frontmatter (name, description, license, compatibility) and full usage instructions.
docs/README.skills.md	Adds a new row for bilig-workpaper to the skills install table at the alphabetically correct position.