feat: add ledger-tasks-yylo skill 🤖🤖🤖

[InsightFactoryAPP]

Pull Request Checklist

• I have read and followed the CONTRIBUTING.md guidelines.
• I have read the Guidance for submissions involving paid services (N/A here — YYLO is free, MIT-licensed open source with no paid tier).
• My contribution adds a new instruction, prompt, agent, skill, workflow, or canvas extension 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, workflow, or canvas extension with GitHub Copilot.
• I have run npm start and verified that README.md is up to date.
• I am targeting the main branch for this pull request.

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Description

Adds one skill:

• skills/ledger-tasks-yylo/SKILL.md — operate YYLO Ledger task management in repositories that use YYLO: create, list, search, get, mark, update, and archive tasks; manage blocked-by dependencies; use ready and topologically sorted order queues to pick safe parallel work; consolidate scattered boards with reviewed merge plans; and plan immutable cold-archive packs. Covers the full public task CLI surface (yy ledger, or standalone yylo-ledger), output formats, environment variables, and the boundaries agents must respect (no direct storage edits, no silent fallback, explicit owner authorization for archive maintenance).

The skill states requirements and limitations (requires the separately installed YYLO CLI or standalone yylo-ledger; read-only discovery by default) and links only to documentation and source repositories.

docs/README.skills.md was regenerated with npm run build; npm run skill:validate passes (419 skills valid, this folder included).

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Type of Contribution

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

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Additional Notes

Affiliation disclosure: I am on the team that builds YYLO. The skill content is vendored from the canonical, independently versioned source at https://github.com/yylo-dev/yylo-skills (MIT), where it is maintained in the open; it is written as neutral operational guidance for the task CLI, in the spirit of the paid-services discussion (guidance about the tool, not promotion of it). Happy to revise wording, trim anything that reads as promotional, or drop the contribution if it does not fit the collection.

The github-issues / create-implementation-plan style planning and execution workflows map naturally onto Copilot coding-agent sessions in YYLO-based repositories; this skill gives the agent the task-store half of that loop.

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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]

🔒 PR Risk Scan Results

Scanned 1 changed file(s).

Severity	Count
🔴 High	0
🟠 Medium	1
ℹ️ Info	0

Severity	Rule	File	Line	Match
🟠	unpinned-version-indicator	skills/ledger-tasks-yylo/SKILL.md	13	```yy ledger(install the orchestrator withnpm install --global '@​​yylo/cli@​​latest'`; Node.js``

This is an automated soft-gate report. Findings indicate review targets and do not block merge by themselves.

[github-actions]

🔴 Contributor Reputation Check: HIGH risk

Check	Risk
Profile	HIGH
Credential audit	NONE

Maintainers: please review this contributor before merging.
See the workflow run for full details.
Automated check powered by AGT.

[github-actions]

🔍 Vally Lint Results

✅ All checks passed

Scope	Checked
Skills	1
Agents	0
Total	1

Severity	Count
❌ Errors	0
⚠️ Warnings	0
ℹ️ Advisories	0

Summary

Level	Finding
ℹ️	✅ ledger-tasks-yylo (2/2 checks passed)
ℹ️	✓ [spec-compliance] All 1 skill(s) are spec-compliant.
ℹ️	✓ spec-compliance: All spec checks passed.
ℹ️	✓ [valid-refs] All file references across 1 skill(s) are valid.
ℹ️	✓ valid-refs: All file references resolve to existing files within the skill directory.
ℹ️	1 skill(s) linted, 1 passed

Full linter output

### Linting skills/ledger-tasks-yylo
✅ ledger-tasks-yylo (2/2 checks passed)
    ✓ [spec-compliance] All 1 skill(s) are spec-compliant.
        ✓ spec-compliance: All spec checks passed.
    ✓ [valid-refs] All file references across 1 skill(s) are valid.
        ✓ valid-refs: All file references resolve to existing files within the skill directory.

1 skill(s) linted, 1 passed