Retire World regression workflow after local cutover #282

🤖 Generated by the Agentic Engineer

Delivered outcome

The unused World-only central regression workflow and its exclusive resolver, contract test, CI hook and catalogue section are removed after the product-owned cutover. The genuinely shared admission runner remains.

The final source cleanup is delivered by #763 (5df28658db1fcb1484d5358d0580a3853e653ecc) and World #1557 (c79e5804b6c9f12ae3479f50521592f9563fca32). The separate shared-CI repair #765 is merged and main CI, release, CD, push and quality checks have succeeded.

Completed checklist

• Complete live consumer/source census proves no second consumer of the World-only interface.
• World #746 is completed and its product-owned action is independently required through the shared trusted runner and repository-bound result.
• Cut over World regression enforcement to the product-owned gate #166 verifies retirement of singleton association 21102220 without an enforcement gap.
• Remove the central World regression workflow.
• Remove its exclusive resolver and dedicated test.
• Remove its CI hook and catalogue section; retain product-neutral automation and parallel action/workflow documentation.
• Pass complete native catalogue validation, exact-head independent review, protected merge and post-merge verification.
• Confirm World PRs remain protected after the central source disappears.

Fresh complete native readback at 2026-10-25 20:50 UTC confirms the retained old World record is disabled at its observed current generation, has no workflow association or bypass, and the shared runner plus repository-bound executed result remain required. All 49 unrelated policy appearances match the pre-retirement baseline; the other two consumers remain protected.

After retirement, the real positive control passed all 187 trusted scenes. The negative control used a candidate no-op validator, but the reviewed action still executed and rejected the candidate parser error. The full source CI retains scene omission, masking, identity, duplicate-name, containment, deadline and cleanup controls. These are distinct evidence layers; this does not claim that every mutation variant was separately submitted as a native control PR.

Part of devantler-tech/world-at-ruin#745. World #1495 remains separately open.