itd-113 calls MCP abcd's second front door; 03-configuration calls an mcp/ door adr-23's third

itd-113 calls MCP abcd's second front door; 03-configuration calls an mcp/ door adr-23's third

A premise contradiction (severity nitpick) found by the cross-document consistency pass.

• End A: .abcd/development/intents/drafts/itd-113-abcd-s-core-verbs-are-reachable-over-mcp.md:16 — "abcd's second front door is open: MCP."
• End B: .abcd/development/brief/05-internals/03-configuration.md:1275 — "(an mcp/ door is adr-23's third)"

itd-113 announces MCP as abcd's second front door. 03-configuration's layout calls an mcp/ door adr-23's third. The two documents count the front doors differently.

Evidence: .abcd/work/reviews/2026-10-26-consistency/00-summary.md, finding 836.