Task: Land official project scaffold plugin on main

Identity

Fast-forward the verified integration commit b92e7ba5bbde186626d93787ca358fbf4c2523a3 onto local main.
Record final default-branch landing evidence while preserving the three explicitly adopted historical task documents unchanged and uncommitted.

Preserve the accepted official bundled-plugin boundary: only the fixed code-owned resource root may execute scaffold.mjs; downloadable Marketplace artifacts continue to reject scripts.
Preserve normal ancestry and do not package, publish, deploy, push, or alter the adopted historical task documents.

Fast-forwarded local main from 336e0bb0caf24537b7b0f350aba3e04a37f5544c to verified integration head b92e7ba5bbde186626d93787ca358fbf4c2523a3.
Local main now contains the unified interactive_ai_app type and the official bundled Marketplace Plugin makelore.project-scaffold, including its Skill, templates, publication guidance, and scaffold.mjs.
Preserved the three explicitly adopted historical task documents byte-for-byte and left them uncommitted.
Excluded the completed source integration task record from the final default-branch tree; it remains reachable on its preserved source branch and commit.

The fast-forward completed without conflicts and b92e7ba5bbde186626d93787ca358fbf4c2523a3 is an ancestor of local main.
The exact landed integration head had already passed Plugin and Skill validators, 88 focused Vitest tests, 12 scaffold Node tests, TypeScript typecheck, Git whitespace checks, and project-document gates.
The task-aware drift check passed while confirming all adopted historical documents remained unchanged.

Packaging, installed-client smoke, live Marketplace publication, deployment, and remote push remain separate authorized operations.