track_progress should support labeled action for pull_request events #1585

Summary

track_progress currently supports the labeled action for issues events, but not for pull_request events. This asymmetry makes it impossible to use track_progress when triggering a review via a label added to a pull request (as opposed to an issue).

Environment

• Action: anthropics/claude-code-action@v1
• Trigger: pull_request (types: [labeled])

Where this is documented

In action.yml:

track_progress:
  description: "Force tag mode with tracking comments for pull_request and issue events.
  Only applicable to pull_request (opened, synchronize, ready_for_review, reopened)
  and issue (opened, edited, labeled, assigned) events."

Note that issue events list labeled as a supported action, but pull_request events do not.

Where this is enforced

In src/modes/detector.ts, validateTrackProgressEvent():

if (context.eventName === "pull_request" && context.eventAction) {
  const validActions = [
    "opened",
    "synchronize",
    "ready_for_review",
    "reopened",
  ];
  if (!validActions.includes(context.eventAction)) {
    throw new Error(
      `track_progress for pull_request events is only supported for actions: ` +
        `${validActions.join(", ")}. Current action: ${context.eventAction}`,
    );
  }
}

Reproduction

1. Configure a workflow with on: pull_request: types: [labeled].
2. Trigger the action with track_progress: true when a specific label (e.g. claude-review) is added to a PR.
3. The action fails immediately with:

Error: track_progress for pull_request events is only supported for actions: opened, synchronize, ready_for_review, reopened. Current action: labeled

Why this matters

A common automation pattern is "add a label to a PR to trigger a Claude review" (mirroring the same pattern that's already supported for issues). Since track_progress is disallowed for this case, users must disable progress tracking entirely just to support label-triggered PR reviews, even though the same feature works fine for label-triggered issue automation.

Suggested fix

Add "labeled" to the validActions list for pull_request events in validateTrackProgressEvent() (and update the corresponding action.yml description), consistent with how issue events already support labeled.

Workaround currently in use

We conditionally disable track_progress only for pull_request events:

track_progress: ${{ github.event_name != 'pull_request' }}

This works, but means PR reviews triggered by label no longer get progress-tracking comments, unlike other trigger paths (e.g. @claude mentions via comments).