Execute project tests

[TorinAsakura]

Task

• [Feature] Execute project tests #839

How to verify

Main scenario

1. Context: a project uses the checked Yarn runtime with Plug and Play and the ESM loader
   Action: run yarn test, yarn test unit, and yarn test integration
   Expected result: each route executes through the public Node.js node:test run() API, consumes the native TestsStream, selects the expected files, and completes with the native test result

Additional scenario

1. Context: a project test fails or a watched run receives its AbortSignal
   Action: consume the project result through the test command or GitHub checks
   Expected result: failures preserve the native test and stderr events, watch abort completes the native stream, and no managed child, IPC protocol, forced termination policy, or project lifecycle status is involved

Proofs

• Root runtime contract: Node.js >=24.15.0 <25; GitHub Actions reads it through node-version-file: package.json
• Behavioral baseline on Node.js 24.19.0 before the structural-only follow-up: source-focused matrix 15 passed, checked-runtime matrix 15 passed, 0 failed
• Structural follow-up only relocates existing discovery, runtime argv resolution, scenario policy, and command input types; execution logic, public commands, and plugin-checks source remain unchanged
• Current-head commit hooks: formatting, scoped typecheck, and scoped lint passed
• Checked runtime and dist runtime are byte-identical with SHA-256 a43146939b398835bccf6e683b2fc7708ca6410c2ab661d8007874b19c038613
• Runtime inventory matches generated documentation: 38 commands and 44 plugins
• Localization synchronization: passed
• Normal help exposes exactly yarn test, yarn test unit, and yarn test integration; command definitions contain no private producer route
• Behavioral baseline disposable packaged PnP/ESM consumer: unit 1 passed, integration 1 passed, general 2 passed, outer commands exited 0

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-08-29T03:39:27.967175Z	b79d9a5	New commits

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[chatgpt-codex-connector]

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Reviewed commit: 33a15ec73f

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