Root cause: tinypool worker teardown calls kill() which returns EPERM in the act_runner host environment on Node.js v25.2.1. Tests pass but the vitest process crashes during cleanup, causing CI failure. Fix: --pool forks CLI flag on every package/service test script, plus pool: 'forks' in all vitest.config.ts files. This uses child_process.fork() worker management which handles termination cleanly. 60 package.json files updated, 10 vitest.config.ts files updated. |
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