v1.31.9

[1.31.9] - 2026-09-07

Added

• Pages created by create_page, build_page, and commit_page_draft are now stamped with by_ai: "mcp" (persisted to the backend pages.by_ai column) so the builder can flag AI-authored pages.

Changed

• create_page, build_page, start_page_draft, and commit_page_draft now check for an existing page before creating one: a duplicate main (homepage), error, or maintain page, or a slug already used on the site, is refused with the conflicting existing_page id so you edit that page in place (replace_page_source / add_section / update_page) instead of creating a shadow duplicate; dry_run calls report blocked: true with the same conflict detail. Only custom pages remain unlimited.
• get_build_guide documents the one-page-per-site rule for the main, error, and maintain page types, and clarifies that store, member, blog, and custom pages are instead kept unique by slug.