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feat(ui): add Mosaic Avatar component#9230

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feat(ui): add Mosaic Avatar component#9230
alexcarpenter wants to merge 7 commits into
mainfrom
carp/mosaic-avatar

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@alexcarpenter

@alexcarpenter alexcarpenter commented Jul 23, 2026

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Description

Adds a new Mosaic Avatar component built with StyleX, following the Button pilot's authoring pattern.

Props:

  • shape: circle (default) | square
  • size: lg | md (default) | sm | xs
  • src / alt: renders an <img> filling the clipped box; otherwise children render as the centered fallback

Styling notes:

  • Square shape uses a fixed 6px border radius for now (does not yet map to a --cl-radius-* token).
  • Sizes drawn from the spacing scale: xs 24px, sm 32px, md 40px, lg 48px, with fallback font-size scaling per size.
  • Emits the standard public contract: cl-avatar class + data-shape / data-size attrs, overridable via consumer className/style.

Swingset

Documented at /components/avatar (stories + MDX, wired into registry.ts and DocsViewer).

Preview: https://swingset-git-carp-mosaic-avatar.clerkstage.dev/components/avatar

Checklist

  • Changeset added (@clerk/ui minor)
  • Unit tests (5 passing)
  • build:mosaic extracts avatar CSS
  • ESLint clean (all @stylexjs rules)

@changeset-bot

changeset-bot Bot commented Jul 23, 2026

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🦋 Changeset detected

Latest commit: dbf4351

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 3 packages
Name Type
@clerk/ui Minor
@clerk/chrome-extension Patch
@clerk/swingset Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

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vercel Bot commented Jul 23, 2026

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The latest updates on your projects. Learn more about Vercel for GitHub.

Project Deployment Actions Updated (UTC)
clerk-js-sandbox Ready Ready Preview, Comment Jul 23, 2026 11:54pm
swingset Ready Ready Preview, Comment Jul 23, 2026 11:54pm

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commit: dbf4351

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github-actions Bot commented Jul 23, 2026

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API Changes Report

Generated by Break Check on 2026-07-23T23:55:28.810Z

Summary

Metric Count
Packages analyzed 19
Packages with changes 0
🔴 Breaking changes 0
🟡 Non-breaking changes 0
🟢 Additions 0

No API Changes Detected

All packages have stable APIs with no detected changes.


Report generated by Break Check

Last ran on dbf4351.

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Review details
⚙️ Run configuration

Configuration used: Repository YAML (base), Organization UI (inherited)

Review profile: CHILL

Plan: Pro Plus

Run ID: 257cd658-abd1-4507-b023-d0a3f5db5c7a

📥 Commits

Reviewing files that changed from the base of the PR and between 9ea8651 and dbf4351.

📒 Files selected for processing (12)
  • .changeset/mosaic-avatar.md
  • .claude/skills/clerk-monorepo/references/setup-and-footguns.md
  • packages/swingset/CLAUDE.md
  • packages/swingset/src/components/DocsViewer.tsx
  • packages/swingset/src/lib/registry.ts
  • packages/swingset/src/stories/avatar.mdx
  • packages/swingset/src/stories/avatar.stories.tsx
  • packages/ui/src/mosaic/components/avatar/avatar.styles.ts
  • packages/ui/src/mosaic/components/avatar/avatar.test.tsx
  • packages/ui/src/mosaic/components/avatar/avatar.tsx
  • packages/ui/src/mosaic/components/avatar/index.ts
  • packages/ui/src/mosaic/styles/index.ts
📝 Walkthrough

Walkthrough

Adds a Mosaic Avatar compound component with StyleX styling, shape and size variants, image loading, fallback handling, ref forwarding, public exports, and tests. Swingset gains Avatar stories, MDX documentation, registry registration, and documentation route resolution. A minor changeset and repository import guidance are also included.

Estimated code review effort: 3 (Moderate) | ~25 minutes

Possibly related PRs

  • clerk/javascript#9221: Adds another component through the same Swingset documentation and registry paths.
🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name Status Explanation Resolution
Docstring Coverage ⚠️ Warning Docstring coverage is 28.57% which is insufficient. The required threshold is 80.00%. Write docstrings for the functions missing them to satisfy the coverage threshold.
✅ Passed checks (4 passed)
Check name Status Explanation
Title check ✅ Passed The title clearly summarizes the main change: adding the Mosaic Avatar component.
Description check ✅ Passed The description is directly related to the changeset and matches the new Avatar component, docs, tests, and styling.
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.

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Actionable comments posted: 1

🧹 Nitpick comments (1)
packages/ui/src/mosaic/components/avatar/avatar.tsx (1)

22-25: 📐 Maintainability & Code Quality | 🔵 Trivial | ⚡ Quick win

Add explicit return types to exported TypeScript functions.

The Avatar render callback and exported story functions currently rely on inference. Add explicit React element return types, using a type-only ReactElement import in the stories file if needed.

  • packages/ui/src/mosaic/components/avatar/avatar.tsx#L22-L25: annotate MosaicAvatar’s return type.
  • packages/swingset/src/stories/avatar.stories.tsx#L37-L39: annotate Primary.
  • packages/swingset/src/stories/avatar.stories.tsx#L41-L49: annotate Image.
  • packages/swingset/src/stories/avatar.stories.tsx#L51-L80: annotate Sizes.
  • packages/swingset/src/stories/avatar.stories.tsx#L82-L99: annotate Shapes.

As per coding guidelines, TypeScript functions, especially public APIs, must have explicit return types.

🤖 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 `@packages/ui/src/mosaic/components/avatar/avatar.tsx` around lines 22 - 25,
Add explicit React element return types to the Avatar render callback in
packages/ui/src/mosaic/components/avatar/avatar.tsx and to the exported story
functions Primary, Image, Sizes, and Shapes in
packages/swingset/src/stories/avatar.stories.tsx; add a type-only ReactElement
import in the stories file if needed.

Source: Coding guidelines

🤖 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.

Inline comments:
In `@packages/ui/src/mosaic/components/avatar/avatar.tsx`:
- Around line 27-35: Update the prop spread order in the Avatar component’s span
so arbitrary ...rest props are applied before the generated themeProps and
stylex props, ensuring generated data-shape and data-size attributes remain
authoritative. Preserve the existing styling and ref behavior.

---

Nitpick comments:
In `@packages/ui/src/mosaic/components/avatar/avatar.tsx`:
- Around line 22-25: Add explicit React element return types to the Avatar
render callback in packages/ui/src/mosaic/components/avatar/avatar.tsx and to
the exported story functions Primary, Image, Sizes, and Shapes in
packages/swingset/src/stories/avatar.stories.tsx; add a type-only ReactElement
import in the stories file if needed.
🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

  • Push a commit to this branch (recommended)
  • Create a new PR with the fixes

ℹ️ Review info
⚙️ Run configuration

Configuration used: Repository YAML (base), Organization UI (inherited)

Review profile: CHILL

Plan: Pro Plus

Run ID: 7bfbc4ac-2d25-45e6-9848-035dc7dcebc5

📥 Commits

Reviewing files that changed from the base of the PR and between acef8a1 and 63070cb.

📒 Files selected for processing (10)
  • .changeset/mosaic-avatar.md
  • packages/swingset/src/components/DocsViewer.tsx
  • packages/swingset/src/lib/registry.ts
  • packages/swingset/src/stories/avatar.mdx
  • packages/swingset/src/stories/avatar.stories.tsx
  • packages/ui/src/mosaic/components/avatar/avatar.styles.ts
  • packages/ui/src/mosaic/components/avatar/avatar.test.tsx
  • packages/ui/src/mosaic/components/avatar/avatar.tsx
  • packages/ui/src/mosaic/components/avatar/index.ts
  • packages/ui/src/mosaic/styles/index.ts
🔗 Linked repositories identified

CodeRabbit considers these linked repositories for cross-repo context during reviews:

  • clerk/clerk_go (manual)
  • clerk/dashboard (manual)
  • clerk/accounts (manual)
  • clerk/backoffice (manual)
  • clerk/clerk (manual)
  • clerk/clerk-docs (manual)
  • clerk/cloudflare-workers (manual)
  • clerk/clerk-ios (auto-detected)
  • clerk/cli (auto-detected)
  • clerk/clerk-android (auto-detected)

Comment thread packages/ui/src/mosaic/components/avatar/avatar.tsx

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Actionable comments posted: 1

🤖 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.

Inline comments:
In `@packages/ui/src/mosaic/components/avatar/avatar.tsx`:
- Around line 124-132: Update the canRender effect in the avatar component to
reset canRender whenever delayMs changes: set it true for undefined and false
before starting a defined delay, then retain the timer cleanup and delayed
transition. Add a regression test covering switches between undefined and
delayed values, including restarting the delay after the avatar has rendered.
🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

  • Push a commit to this branch (recommended)
  • Create a new PR with the fixes

ℹ️ Review info
⚙️ Run configuration

Configuration used: Repository YAML (base), Organization UI (inherited)

Review profile: CHILL

Plan: Pro Plus

Run ID: 82949fb8-5ccd-4dbd-ad24-e91f98dbbbbd

📥 Commits

Reviewing files that changed from the base of the PR and between 63070cb and 9ea8651.

📒 Files selected for processing (11)
  • .changeset/mosaic-avatar.md
  • .claude/skills/clerk-monorepo/references/setup-and-footguns.md
  • packages/swingset/CLAUDE.md
  • packages/swingset/src/lib/registry.ts
  • packages/swingset/src/stories/avatar.mdx
  • packages/swingset/src/stories/avatar.stories.tsx
  • packages/ui/src/mosaic/components/avatar/avatar.styles.ts
  • packages/ui/src/mosaic/components/avatar/avatar.test.tsx
  • packages/ui/src/mosaic/components/avatar/avatar.tsx
  • packages/ui/src/mosaic/components/avatar/index.ts
  • packages/ui/src/mosaic/styles/index.ts
🔗 Linked repositories identified

CodeRabbit considers these linked repositories for cross-repo context during reviews:

  • clerk/clerk_go (manual)
  • clerk/dashboard (manual)
  • clerk/accounts (manual)
  • clerk/backoffice (manual)
  • clerk/clerk (manual)
  • clerk/clerk-docs (manual)
  • clerk/cloudflare-workers (manual)
  • clerk/clerk-ios (auto-detected)
  • clerk/cli (auto-detected)
  • clerk/clerk-android (auto-detected)
🚧 Files skipped from review as they are similar to previous changes (6)
  • packages/ui/src/mosaic/components/avatar/index.ts
  • packages/ui/src/mosaic/styles/index.ts
  • .changeset/mosaic-avatar.md
  • packages/ui/src/mosaic/components/avatar/avatar.styles.ts
  • packages/swingset/src/lib/registry.ts
  • packages/swingset/src/stories/avatar.mdx

Comment on lines +124 to +132
const [canRender, setCanRender] = React.useState(delayMs === undefined);

React.useEffect(() => {
if (delayMs === undefined) {
return;
}
const timer = setTimeout(() => setCanRender(true), delayMs);
return () => clearTimeout(timer);
}, [delayMs]);

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🎯 Functional Correctness | 🟡 Minor | ⚡ Quick win

🧩 Analysis chain

🏁 Script executed:

#!/bin/bash
set -euo pipefail

# Inspect the avatar component around the relevant code.
sed -n '1,220p' packages/ui/src/mosaic/components/avatar/avatar.tsx

echo '--- TEST SEARCH ---'
# Find tests or usages that cover delayMs / canRender behavior.
rg -n "delayMs|canRender|avatar" packages/ui/src -g '*.{test,spec}.{ts,tsx}' -g '*.{test,spec}.tsx' -g '*.{test,spec}.ts' || true

Repository: clerk/javascript

Length of output: 11894


🏁 Script executed:

#!/bin/bash
set -euo pipefail

sed -n '1,220p' packages/ui/src/mosaic/components/avatar/avatar.test.tsx

Repository: clerk/javascript

Length of output: 4099


Reset canRender when delayMs changes. Switching from a delayed fallback to undefined leaves the fallback hidden, and changing to a new delay after it has already rendered skips the delay entirely. Reset the state in the effect and add a rerender regression test.

🤖 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 `@packages/ui/src/mosaic/components/avatar/avatar.tsx` around lines 124 - 132,
Update the canRender effect in the avatar component to reset canRender whenever
delayMs changes: set it true for undefined and false before starting a defined
delay, then retain the timer cleanup and delayed transition. Add a regression
test covering switches between undefined and delayed values, including
restarting the delay after the avatar has rendered.

Source: Coding guidelines

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