Debug Test Failure

Overview

Use this skill to answer one question: did the current branch's changes introduce the observed test failure, or did the failure already exist at the baseline before the user's or agent's changes?

Workflow

1. Capture the current context.

   • Read repository instructions and respect prohibited commands.
   • Record the current repo path, branch, git status --short, and test command.
   • If the user specified test files, test names, or a test command, use that targeted test command.
   • If the user did not specify tests, run the repository's full test suite or the closest documented "all tests" command.

2. Identify the comparison baseline.

   • Determine "me" from the user's explicit identity if provided; otherwise use git config user.email and git config user.name.
   • Determine the branch base with the upstream or default branch, for example: