docs: clarify pr-creator body guidance

[chenjiahan]

This PR updates the internal pr-creator skill to prefer concise, review-oriented PR descriptions.
The new guidance focuses summaries on why the change matters, what changed, and reviewer-important impact.

[Copilot]

Pull request overview

This PR refines the internal pr-creator skill’s guidance for writing PR bodies, emphasizing concise, review-oriented descriptions that focus on why the change matters, what changed, and reviewer-relevant impact.

Changes:

• Updates the PR body guidance to prefer 1–4 short standalone sentences for typical changes, centered on rationale, change summary, and review impact.

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[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: b1052394-83ac-4880-b7f2-d4b73abd5133

📥 Commits

Reviewing files that changed from the base of the PR and between 1b3787a and 3d67092.

📒 Files selected for processing (1)

• .agents/skills/pr-creator/SKILL.md

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📝 Walkthrough

Walkthrough

This change updates a single line in the pr-creator skill's documentation file, revising the guidance for writing pull request body descriptions. The instruction now specifies using 1–4 short standalone sentences for typical changes, replacing the previous guidance of a compact paragraph or 2–4 bullets.

Changes

File	Change Summary
.agents/skills/pr-creator/SKILL.md	Updated PR body brevity guidance from "compact paragraph or 2–4 bullets" to "1–4 short standalone sentences"

Sequence Diagram(s)

Not applicable for this documentation-only change.

Compact Metadata
Type: Documentation
Impact: Low
Files changed: 1
Lines changed: +1/-1

Related Issues: None specified.

Related PRs: None specified.

Suggested Labels: documentation

Suggested Reviewers: None specified.

Poem
A single line, refined and neat,
Four sentences, short and sweet.
No more bullets scattered wide,
Just clear words, side by side.
A tiny hop, but well complete. 🐇

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chenjiahan/docs-pr-creator-body-guidance

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