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Regression Checker

ln-503-regression-checker

Worker that runs existing tests to catch regressions. Auto-detects framework, reports pass/fail. No status changes or task creation.

SKILL.md

Full skill instructions

Regression Checker

Runs the existing test suite to ensure no regressions after implementation changes.

Purpose & Scope

  • Detect test framework (pytest/​jest/​vitest/​go test/​etc.) and test dirs.
  • Execute full suite; capture results for Story quality gate.
  • Return PASS/​FAIL with counts/​log excerpts; never modifies Linear or kanban.

When to Use

  • Invoked by ln-500-story-quality-gate Pass 1 (after ln-501 and ln-502)
  • Code quality check passed

Workflow (concise)

  1. Auto-discover framework and test locations from repo config/​files.
  2. Read docs/​project/​runbook.md — get exact test commands, Docker setup, environment variables. Use commands from runbook, NOT guessed commands.
  3. Build appropriate test command; run with timeout (~5m); capture stdout/​stderr.
  4. Parse results: passed/​failed counts; key failing tests.
  5. Output verdict JSON (PASS or FAIL + failures list) and add Linear comment.

Critical Rules

  • No selective test runs; run full suite.
  • Do not fix tests or change status; only report.
  • Language preservation in comment (EN/​RU).

Definition of Done

  • Framework detected; command executed.
  • Results parsed; verdict produced with failing tests (if any).
  • Linear comment posted with summary.

Reference Files

  • Risk-based limits used downstream: ../​ln-510-test-planner/​references/​risk_based_testing_guide.md

Version: 3.1.0 (Added mandatory runbook.md reading before test execution) Last Updated: 2026-01-09

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