feat(skills): add before-and-after

[shunkakinoki]

Adds Vercels before-and-after screenshot skill to the managed catalog and lockfile.

Validated with make skills-install.

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Summary by cubic

Added the vercel-labs/before-and-after screenshot skill to the managed catalog and updated skills-lock.json to lock its source for consistent installs.

^{Written for commit 9589ed3. Summary will update on new commits.}

[coderabbitai]

📝 Walkthrough

Summary by CodeRabbit

• New Features
  • Added the before-and-after skill to the available skills installation list.
  • Included its source and installation details for reliable setup.

Walkthrough

The PR adds the vercel-labs/before-and-after repository and its before-and-after skill to the installation list. It also adds the skill source, path, and folder hash to skills-lock.json.

Changes

Before-and-after skill

Layer / File(s)	Summary
Register and lock the skill SKILLS.txt, skills-lock.json	SKILLS.txt adds the repository and skill. skills-lock.json records the GitHub source, skill/SKILL.md path, and folder hash.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Possibly related PRs

• shunkakinoki/dotagents#176: Establishes the installation and lockfile workflow used by this PR.
• shunkakinoki/dotagents#180: Adds a skill to both SKILLS.txt and skills-lock.json.
• shunkakinoki/dotagents#187: Adds a skill repository and matching lockfile entry.

Poem

A rabbit hops through fields of code,
A new skill joins the install road.
Its source is locked, its path is clear,
The before-and-after skill is here.
Nibble, commit, and cheer! 🐇

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the main change: adding the before-and-after skill.
Description check	✅ Passed	The description accurately explains the skill catalog and lockfile updates and mentions validation.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch codex/add-before-and-after-skill

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[coderabbitai]

🧹 Nitpick comments (1)

SKILLS.txt (1)

190-191: 🔒 Security & Privacy | 🔵 Trivial | ⚡ Quick win

List the skill explicitly instead of installing all repository skills.

Line 1 defines an omitted skill list as install-all. This PR adds only before-and-after, and skills-lock.json locks only that skill. Use an explicit list so future upstream skills are not selected implicitly.

Suggested fix

-# vercel-labs/before-and-after (1 total) - keep all
-vercel-labs/before-and-after
+# vercel-labs/before-and-after (1 total)
+vercel-labs/before-and-after before-and-after

🤖 Prompt for AI Agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@SKILLS.txt` around lines 190 - 191, Update the skill configuration around the
vercel-labs/before-and-after entry to explicitly list that skill instead of
relying on an omitted list being interpreted as install-all. Preserve the
existing before-and-after selection and keep it consistent with the single
locked skill in skills-lock.json.

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Nitpick comments:
In `@SKILLS.txt`:
- Around line 190-191: Update the skill configuration around the
vercel-labs/before-and-after entry to explicitly list that skill instead of
relying on an omitted list being interpreted as install-all. Preserve the
existing before-and-after selection and keep it consistent with the single
locked skill in skills-lock.json.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 4fcec505-cc0e-47b2-a0fd-a45958577115

📥 Commits

Reviewing files that changed from the base of the PR and between 294c047 and 9589ed3.

📒 Files selected for processing (2)

• SKILLS.txt
• skills-lock.json