WP Codebox 0.14.0 drops successful WP-CLI JSON result from recipe intake

[chubes4]

Problem

WP Codebox 0.14.0 completes a Static Site Importer fixture-matrix recipe successfully but the matrix intake receives none of the JSON emitted by the fixture's static-site-importer validate-artifact WP-CLI command. The same SSI commit under WP Codebox 0.13.1 receives the command payload normally.

This makes the fixture look passed while all runtime attribution is absent: ssi_validation and import_report are null, diagnostics are empty, and matrix evidence reports the materialization receipt, WordPress site plan, and transformer identity missing.

Reproduction

SSI commit: 7977d3af80b6ff5447f90d43555b9e82ad75f78f (Automattic/static-site-importer#720)

Fixture: 27-university-department

Lab run on WP Codebox 0.14.0:

homeboy runs show a7d410c9-0f2f-48eb-a686-c0f11ab6c60d

Result artifact:

https://homeboy-artifacts-tunnel.dev.chubes.net/a7d410c9-0f2f-48eb-a686-c0f11ab6c60d/c7339202-dee8-4f5f-83ec-fce0db9e70c4-static-site-fixture-matrix-result.json

Observed fixture result:

{
  "status": "passed",
  "success": true,
  "ssi_validation": null,
  "import_report": null,
  "diagnostics": [],
  "matrix_evidence": {
    "readiness": "legacy_evidence_missing",
    "missing": [
      "transformer_package",
      "transformer_version",
      "transformer_reference",
      "wordpress_site_plan",
      "materialization_receipt"
    ]
  }
}

The only fixture artifact reference retained by intake is the staged input artifact.json. The Lab batch itself exited 0 and produced a parsed 2,486,837-byte WP Codebox output.

Local control on WP Codebox 0.13.1:

homeboy runs show 2edcff23-c9d4-4ccf-afa4-95a99536e7f2

The same SSI commit exposes executions[3].result.json with fixture_diagnostics, import_report, and materialization_receipt; matrix evidence is verified with no missing fields. A prior local control, 3385e3da-59ba-4975-ab45-ed41cfe92369, produced the same verified evidence.

Expected

The successful wordpress.wp-cli execution's structured JSON remains available to recipe consumers and the fixture cannot pass when its declared validation command payload disappears.

Version boundary

• Local control: WP Codebox workspace/core/playground/CLI 0.13.1, Node 24.15.0.
• Lab failure: WP Codebox workspace/core/playground/CLI 0.14.0, Node 24.18.0.
• Both use @wp-playground/cli 3.1.46 and @wp-playground/wordpress-builds 0.9.19.

The 0.14.0 range includes the WP-CLI temporary-script lifecycle changes from #2004 and dependency-overlay autoload reconciliation from #1955. The failing Lab run also activates a Blocks Engine composer-package overlay; the local 0.13.1 control silently uses the pinned package because 0.13.1 predates #1955. A reduced 0.14.0 run should isolate whether result loss is in the WP-CLI wrapper lifecycle or the overlay path.