Run typecheck, tests, and build on pull requests

[nimble-turtle]

Problem

release.yml triggers only on push to main, so yarn test runs after a merge has already landed. Pull requests get no test CI at all — currently only CodeRabbit reports a status. A broken commit is caught once it is on main and mid-publish, which is how the failed run for chore: version packages (#8) surfaced.

Change

Adds .github/workflows/ci.yml, triggered on pull_request:

• yarn typecheck
• yarn test
• yarn build

yarn build is included because prepack invokes it at publish time — a build break would otherwise stay invisible until the release run, after merge.

Notes:

• permissions: contents: read — least privilege; this job needs nothing else.
• concurrency is scoped per ref with cancel-in-progress, so a new push to a PR supersedes the run it obsoletes.
• Trigger is pull_request only, not push: main. release.yml already runs the tests on main, so adding it here would duplicate every post-merge run.

Enabling branch protection

To make this a required check, the context name to select is Typecheck, test, build (the job's name:, not the job id verify).

No changeset

Intentionally omitted. This touches CI only and changes nothing in the published package, so it is not a releasable change under AGENTS.md. Adding one would trigger a version bump and an empty release.

🤖 Generated with Claude Code

Summary by CodeRabbit

• Chores
  • Added automated continuous integration checks for pull requests.
  • CI now verifies type safety, tests, and production builds using a consistent environment.
  • In-progress checks are automatically canceled when newer changes are submitted.

[coderabbitai]

Note

Currently processing new changes in this PR. This may take a few minutes, please wait...

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Advanced

Run ID: ae68aad6-366c-4054-bee7-59ba84259680

📥 Commits

Reviewing files that changed from the base of the PR and between 492b995 and 8786a68.

📒 Files selected for processing (1)

• .github/workflows/ci.yml

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Commit to this branch
• Create a new PR

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