tonic-ui-pr

name	tonic-ui-pr
description	Generate PR descriptions and changeset entries. Use when the user mentions "PR", "pull request", "PR description", "changeset", provides a diff or describes code changes, or asks to draft a merge request. Also trigger for conventional commit message generation.

PR Description Generator

Generate well-structured PR descriptions following conventional commits and tonic-ui project conventions. Based on analysis of 885 commits and 721 PRs.

Pre-Work Checklist

CRITICAL: Always complete these steps BEFORE writing PR descriptions

• Run git commands to understand changes — Never write PR descriptions without seeing the actual changes
• Check commit history — Review recent commits to match repository style
• Identify changed files and scope — Determine which packages/components are affected

Run these commands in parallel:

git status              # See all changed files
git diff HEAD           # See all changes
git log --oneline -10   # See recent commit message style

For efficiency: Make all three Bash tool calls in a single message since they're independent.

Scope Rules

Allowed	NOT Allowed
Generate PR titles and descriptions	Modify source code
Create changeset files for monorepos	Create changesets for non-monorepo projects
Draft commit messages	Automatically commit or push changes
Review and summarize diffs	Add features or fix bugs

If asked to create a changeset for a non-monorepo project, explain that changesets are only used in Tonic UI and Tonic One monorepos.

PR Title Format

Follow conventional commits:

<type>(<scope>): <short description>

Formatting rules:

• Lowercase first letter after type/scope (87% convention)
• Under 72 characters
• No period at end
• Wrap component/prop/package names in backticks (34% of PRs do this)

Types (by frequency in this repo):

Type	Usage	%
feat	New features, components, props	38%
docs	Documentation changes	16%
fix	Bug fixes	15%
chore	Dependencies, releases, tooling	14%
refactor	Code restructuring, no behavior change	5%
ci	CI/CD changes	2%
breaking	Breaking changes (repo-specific type)	2%
test	Test additions/changes	<1%
build	Build system changes	<1%
style	Formatting, whitespace	<1%
revert	Reverting previous changes	<1%

Important — breaking as a type: This repo historically uses breaking: as a standalone type prefix (15 PRs), NOT the conventional feat!: notation. Only 1 PR uses the ! marker.

breaking: deprecate the rarely used FlatButton component
breaking: deprecate the second argument of CheckboxGroup onChange callback
feat(react/date-pickers)!: deprecate Calendar and replace it with DateCalendar  ← only 1 uses !

Scope conventions:

Format	Example	Notes
package/component	react/menu, react/scrollbar, react/tag	Current convention (recent trend)
Package name	react, styled-system, utils, react-hooks	For package-wide changes
No scope	feat: add X component	Acceptable for cross-cutting changes

Common scopes: react/menu, react/table, react/scrollbar, react/checkbox, react/toast, react/date-pickers, styled-system, utils, react-hooks, react-icons, theme

Cross-repo references: When porting changes from/to Tonic One, include [tonic-one-pr-NNN] in the title.

Examples:

feat(react/scrollbar): add `scrollViewProps` to enable passing custom props
fix(react/menu): correct focus management on keyboard navigation
refactor(styled-system): migrate to semantic color tokens
docs: update `Table` component examples
chore(deps): bump webpack from 5.88.0 to 5.89.0
breaking: deprecate the `FlatButton` component
revert(react/InputGroup): restore pseudo-class styling

PR Body Template

Based on the actual patterns used in recent PRs (not a generic template):

## Summary

Closes #ISSUE_NUMBER (if applicable)

Brief 1-3 sentence description of the change.

Demo: https://trendmicro-frontend.github.io/tonic-ui-demo/react/pr-{PR_NUMBER}/components/{COMPONENT}/

## Changes

- **Component/File**: Description of change
- **Component/File**: Description of change

## Motivation

Why this change was needed. (Optional — include for non-trivial changes)

## Migration

Before/after code examples showing migration path. (Only for breaking changes)

Section usage guide:

• ## Summary — Always include. 1-3 sentences + optional demo link + optional Closes #NNN
• ## Changes — Always include for multi-file changes. Bullet list of what changed where.
• ## Motivation — Include when the "why" isn't obvious from the summary
• ## Migration — Only for breaking changes. Show before/after code examples.

Demo links: ~48% of PRs include a demo link. Format:

https://trendmicro-frontend.github.io/tonic-ui-demo/react/pr-{PR_NUMBER}/components/{COMPONENT}/
https://trendmicro-frontend.github.io/tonic-ui-demo/react/pr-{PR_NUMBER}/hooks/{HOOK_NAME}/

Issue references:

• Closes #NNN or Close #NNN — for GitHub issues (~10% of PRs)
• Related PR: #NNN or Depends on: #NNN — for PR dependencies (~2% of PRs)

What NOT to include:

• ## Testing section — never used in this repo
• Jira ticket references (TVO-XXXX, V1E-XXXX) — not used in this repo
• Figma links — only ~4% of PRs, include only if the user provides one

Changeset Entries

When the change affects a publishable package, generate a changeset file.

File Naming Convention

.changeset/tonic-ui-pr-{PR_NUMBER}.md

For multiple changesets on the same PR, use suffixes:

.changeset/tonic-ui-pr-943a.md
.changeset/tonic-ui-pr-943b.md

Or descriptive suffixes:

.changeset/tonic-ui-pr-987-modal-regression.md
.changeset/tonic-ui-pr-987-react-hooks.md

Changeset Format

---
"@tonic-ui/react": minor
---

feat(react/scrollbar): add `scrollViewProps` to enable passing custom props to the `ScrollView`

Description rules:

• Always single line
• Use conventional commit format matching the PR title
• Wrap component/prop names in backticks
• ~75 characters average length
• This description becomes the changelog entry

Bump Rules

Bump	When	Frequency
patch	Bug fixes, refactoring, styling corrections, internal improvements	56%
minor	New components, new props, new hooks, new features	42%
major	Breaking API changes (extremely rare)	2%

Package Names (by frequency)

Package	Changeset Frequency
@tonic-ui/react	66% (most common)
@tonic-ui/styled-system	6%
@tonic-ui/react-hooks	6%
@tonic-ui/utils	5%
@tonic-ui/react-icons	5%
@tonic-ui/react-base	5%
@tonic-ui/theme	2%

Tonic One packages: @tonic-one/react, @tonic-one/react-icons, @tonic-one/react-hooks, @tonic-one/react-data-grid

Never create changesets for: codemod, changelog-github, react-docs (internal/dev packages)

Single vs Multi-Package

• Single-package changesets are the norm (86%)
• Multi-package only when the change genuinely spans package boundaries:
  • Cross-cutting infrastructure (e.g., React 19 compat across react, react-base, react-hooks)
  • Feature with utility dependency (e.g., component + utils)
  • Bug fix spanning hook + component (e.g., react-hooks + react)

Changeset Configuration

• Config: .changeset/config.json
• Base branch: v2 (not master)
• Release PR title: chore(release): version packages
• Release workflow: Automated via .github/workflows/changesets-release.yml on push to v2

Workflow: Diff → PR Description

Step 1: Analyze Changes (Use parallel tool calls)

# Make all three Bash tool calls in one message:
git status
git diff HEAD
git log --oneline -10

Step 2: Classify the Change

Identify:

• Type: feat/fix/refactor/docs/chore/ci/breaking/test/build/style/revert
• Scope: From file paths (e.g., react/button, react-hooks/useColorMode, theme)
• Breaking changes: API changes, removed features, behavior changes
• Affected packages: Which packages in the monorepo are impacted

Step 3: Write PR Content

Generate:

1. PR Title — Following conventional commits format
2. PR Body — Using the template above
3. Changeset — With correct file name, package, bump type, and description

Step 4: Verify Quality

Post-Generation Checklist:

• PR title follows <type>(<scope>): <description> format
• Title is under 72 characters with lowercase first letter
• Body uses ## Summary / ## Changes sections (not ## What Changed)
• Demo link included if applicable
• ## Migration section included if breaking change
• Changeset file named tonic-ui-pr-{NUMBER}.md
• Changeset bump type correct (patch/minor/major)
• Changeset package names accurate
• Changeset description is single-line conventional commit format

Common Mistakes to Avoid

Vague PR titles:

fix: fix bug                          ← too vague
feat: add feature                     ← too vague
fix: fix the issue with the component ← redundant "fix: fix"

Specific PR titles:

fix(react/scrollbar): prevent scroll jump on content update
feat(react/table): add sticky header support with `stickyHeader` prop

Wrong PR body template:

## What Changed    ← wrong, use "## Summary"
## Why             ← wrong, use "## Motivation"
## How             ← wrong, use "## Changes"
## Testing         ← not used in this repo
## Related
- Jira: TVO-XXXX  ← not used in this repo

Wrong changeset file name:

.changeset/fuzzy-pots-clap.md         ← auto-generated name, don't use
.changeset/tonic-ui-943.md            ← old convention
.changeset/tonic-ui-pr-943.md         ← correct current convention

Label Conventions

PRs in this repo use labels with the following conventions:

Label	Usage
feature (enhancement)	New features
bug	Bug fixes
documentation	Docs changes
refactor (improvement)	Refactoring
breaking change	Breaking changes
build (ci/cd)	CI/CD changes
dependencies	Dependency updates
work in progress	Draft/WIP PRs
review required	Ready for review
Review effort [1-5]: N	Review complexity rating