name: check-test-diff description: Guard skill to prevent accidental mass deletion or modification of Go test files in diffs. compatibility: opencode metadata: version: "0.2" impact: High tags: ["tests", "diff", "guard", "qa"]

Skill: check-test-diff

Description

This skill enforces QA safety by guarding against accidental or excessive changes to Go test files (*_test.go) in git diffs. It fails if any test file is deleted, or if any test file has more than 100 lines deleted in a single diff.

When to Use

• As a pre-merge or CI guard to prevent accidental removal or mass modification of test coverage.
• When reviewing large or automated changes that may unintentionally impact test files.

Usage

Run the shell script in this directory to check the current diff:

bash .opencode/skills/check-test-diff/check_test_diff.sh

To check a specific repository (optional):

bash .opencode/skills/check-test-diff/check_test_diff.sh --repo repo/<repo-name>

Expected Outcomes

• Exit code 0: No forbidden test file deletions or excessive line deletions detected. Prints a summary of test file changes.
• Exit code 1: One or more *_test.go files deleted, or a test file has >100 lines deleted. Prints details of violations and fails the check.

Notes

• This skill does not run or select test suites; it only guards against risky test file diffs.
• ASCII-only output and file compliance enforced.