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changesets-action/pr-status/README.md
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Adam Haglundandbluwy 8b7799e7d8 update note regarding pull_request_target (#644)
* Update README with pull_request_target usage guidelines

Add caution and warning notes regarding the use of pull_request_target event.

* Update README with pull_request_target caution

Added caution about using pull_request_target and alternative options.

* update wording for executing untrusted code

* Format

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Co-authored-by: bluwy <bjornlu.dev@gmail.com>
2026-06-08 15:05:55 +00:00

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# changesets/action/pr-status
This action generates the changesets status in PRs, e.g. whether it has changeset files and which packages will be released if the PR is merged.
It requires the repo to be checked out, and automatically fetches the PR head ref into a temporary detached worktree in order to infer the changed files and packages.
See the [action metadata](action.yml) for details on the inputs and outputs.
> [!CAUTION]
> **This action uses `pull_request_target` by default to support PRs from forks.**
>
> **Do not run untrusted code** when using the `pull_request_target` event.
>
> The example below only **_checks out_** and **_reads_** code, and does not **_execute_** any code from the fork.
>
> Read more about the `pull_request_target` event in the [GitHub documentation](https://docs.github.com/en/actions/reference/workflows-and-actions/events-that-trigger-workflows#pull_request_target).
You can also use the [`pull_request`](https://docs.github.com/en/actions/reference/workflows-and-actions/events-that-trigger-workflows#pull_request) event if you prefer to lock permissions down and not run for PRs from forks. Make sure to add an if check to prevent the action from failing in fork PRs:
```yaml
jobs:
pr-status:
if: github.event.pull_request.head.repo.full_name == github.repository
# ...
```
You can also use the [Changesets Bot](https://github.com/apps/changeset-bot) if you don't want an extra action in your repo, or are worried about the `pull_request_target` event.
## Example setup
```yaml
# .github/workflows/comment-changesets-pr-status.yml
name: Comment Changesets status in PRs
on:
pull_request_target:
permissions: {} # require explicitly stating all permissions in each job
concurrency:
group: ${{ github.workflow }}-${{ github.event.pull_request.number }}
cancel-in-progress: true
jobs:
pr-status:
runs-on: ubuntu-slim
permissions:
contents: read # to check out files in the repo
outputs:
comment-body: ${{ steps.pr-status.outputs.comment-body }}
steps:
- name: Check out repo
uses: actions/checkout@v6
- name: Generate status
id: pr-status
uses: changesets/action/pr-status@v1
pr-comment:
needs: pr-status
runs-on: ubuntu-slim
permissions:
pull-requests: write # to create and update comments on PRs
steps:
- name: Comment on PR
uses: changesets/action/pr-comment@v1
with:
body: ${{ needs.pr-status.outputs.comment-body }}
```
The workflow uses [`@changesets/action/pr-comment`](../pr-comment/README.md), which is a simple GitHub Action to comment on PRs.