Add Latchshot public-page capture skill 🤖🤖🤖

[BaiqingL]

Summary

• Add the latchshot-page-capture Agent Skill and its dependency-free Node.js helper.
• Latchshot is a hosted third-party service maintained by this contributor. The skill keeps it optional and preserves local-browser workflows for private pages or unsupported actions.
• Provide a constrained no-key JPEG proof; authenticated capture and quota reads use an environment-only API key.
• Limit the workflow to public HTTP(S) pages and PNG, JPEG, or PDF artifacts. Exclude authenticated/private pages, raw HTML, extraction, arbitrary browser actions, CAPTCHA handling, proxies, and bypass behavior.
• Keep upgrade, checkout, payment, and other commercial actions outside the skill.
• Complement the existing local-browser screenshot skills with a hosted public-page-to-artifact workflow.

The helper uses a fixed service origin, validates URLs before requests, bounds response reads, validates MIME type and file signatures, and writes artifacts atomically. Source: https://github.com/BaiqingL/latchshot-page-capture

Validation

• npm run skill:validate: all 387 skills valid
• Microsoft Vally: 2/2 checks passed
• npm run build: reproducible; generated index is current
• bash eng/fix-line-endings.sh
• Skill Creator quick validator: passed
• Agent Skills reference validator: passed
• codespell: passed
• Node.js syntax and help smoke test: passed
• Helper is byte-identical to the published v1.1.0 helper, whose standalone suite passes 9/9 tests

The installed GitHub CLI here is 2.89.0, below the 2.90.0 requirement for the generated gh skills command, so I did not claim a local gh skills install test.

[github-actions]

🔒 PR Risk Scan Results

Scanned 3 changed file(s).

Severity	Count
🔴 High	0
🟠 Medium	1
ℹ️ Info	1

Severity	Rule	File	Line	Match
🟠	package-exec-command	docs/README.skills.md	31	| [acreadiness-assess](../skills/acreadiness-assess/SKILL.md)<br />`gh skills install github/awesome-copilot acreadiness-assess` | Run the AgentRC readiness assessment on the curre
ℹ️	skill-script-touched	skills/latchshot-page-capture/scripts/latchshot.mjs	1	skills/latchshot-page-capture/scripts/latchshot.mjs

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	npm warn EBADENGINE Unsupported engine {
ℹ️	npm warn EBADENGINE package: 'commander@15.0.0',
ℹ️	npm warn EBADENGINE required: { node: '>=22.12.0' },
ℹ️	npm warn EBADENGINE current: { node: 'v20.20.2', npm: '10.8.2' }
ℹ️	npm warn EBADENGINE }
ℹ️	npm warn deprecated prebuild-install@7.1.3: No longer maintained. Please contact the author of the relevant native addon; alternatives are available.
ℹ️	✅ latchshot-page-capture (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.

Full linter output

### Linting skills/latchshot-page-capture
npm warn EBADENGINE Unsupported engine {
npm warn EBADENGINE   package: 'commander@15.0.0',
npm warn EBADENGINE   required: { node: '>=22.12.0' },
npm warn EBADENGINE   current: { node: 'v20.20.2', npm: '10.8.2' }
npm warn EBADENGINE }
npm warn deprecated prebuild-install@7.1.3: No longer maintained. Please contact the author of the relevant native addon; alternatives are available.
✅ latchshot-page-capture (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