Migrate from bundlesize to size-limit

[erikras-dinesh-agent]

Migrates from deprecated bundlesize to size-limit for bundle size monitoring.

Changes

• Remove bundlesize dependency
• Add @size-limit/preset-small-lib and size-limit dependencies
• Convert bundlesize configuration to size-limit format
• Add Bundle Size Check job to CI workflow
• Update GitHub Actions to v4 (checkout, setup-node)

Bundle Size Limits

• dist/react-final-form-listeners.umd.min.js: 2kB
• dist/react-final-form-listeners.es.js: 3kB
• dist/react-final-form-listeners.cjs.js: 3kB

Part of the bundlesize → size-limit migration across all Final Form repos.

Summary by CodeRabbit

• Chores
  • Updated CI to use Node.js 22 and newer GitHub Actions versions.
  • Added a dedicated bundle-size check job to CI for independent size monitoring.
  • Migrated bundle size tooling to a new size-checking utility and updated project dev-dependencies accordingly.

[coderabbitai]

📝 Walkthrough

Walkthrough

The PR updates the GitHub Actions CI to use newer action versions and Node.js 22, adds an independent bundle size job, and replaces bundlesize with size-limit and its preset in package.json, migrating the configuration from threshold to limit.

Changes

Cohort / File(s)	Summary
CI Workflow Updates .github/workflows/ci.yml	Bumped actions/checkout and actions/setup-node from v2 to v4, set node-version: "22" and updated display name to "Use Node.js 22" across jobs. Added a new size job that checks out, sets up Node 22, installs, builds, and runs size-limit.
Build Tool Migration package.json	Removed bundlesize devDependency; added size-limit and @size-limit/preset-small-lib. Replaced top-level bundlesize config with a size-limit block, converting each threshold key to limit.

Sequence Diagram(s)

mermaid
sequenceDiagram
autonumber
participant Repo as Repo (code)
participant GH as GitHub Actions
participant Runner as Runner (Node 22)
participant Size as size-limit
Repo->>GH: push / PR triggers workflow
GH->>Runner: checkout repo\n(setup Node.js 22)
Runner->>Runner: install deps\nbuild project
Runner->>Size: run size-limit
Size-->>Runner: size report (pass/fail)
Runner-->>GH: emit job result

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Poem

🐰 I hopped through yml and package.json bright,
Upgraded nodes to twenty-two tonight.
Size-limit hummed, bundlesize took flight,
CI runs cleaner — carrot cake delight! 🎉

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'Migrate from bundlesize to size-limit' directly and accurately reflects the main objective of the pull request—replacing the deprecated bundlesize tool with size-limit.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch migrate-to-size-limit

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No actionable comments were generated in the recent review. 🎉

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[coderabbitai]

Actionable comments posted: 2

🤖 Fix all issues with AI agents

In @.github/workflows/ci.yml:
- Around line 50-51: Update the Codecov GitHub Action to the latest major
release by changing the uses reference from codecov/codecov-action@v2.1.0 to
codecov/codecov-action@v5 (or `@v5.x`) in the workflow step named "Run code
coverage"; ensure the step's input parameters remain compatible with v5 and
adjust any input keys if the action's v5 interface differs.

In `@package.json`:
- Around line 85-87: The devDependencies block in package.json is not
alphabetically sorted: move "@size-limit/preset-small-lib" into the group of
"@"-scoped packages (near other `@-prefixed` entries such as
"@typescript-eslint/parser") and place "size-limit" in its alphabetical position
(for example after "rollup-plugin-uglify"), ensuring the entire devDependencies
section is sorted lexicographically so new entries are ordered consistently.

[erikras-dinesh-agent]

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[coderabbitai]

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