## spec-115 — Cross-IDE Entry-Point Governance and Engineering Principles Standard

**Branch**: `feat/knowledge-placement-governance-cleanup`. **Status**: approved (architecture standard; enforcement landed inside spec-116).

Defines the cross-IDE governance contract for entry-point files (`AGENTS.md`, `CLAUDE.md`, `CONSTITUTION.md`) and the engineering-principles SSOT. Authoritative reference for spec-116's enforcement work and any future IDE-mirror additions.
