MODULE_SYSTEM.md §2.5 and Part 3 record the org lead's rule from
2026-09-23: core's installer refuses a module whose id differs from the
one installed, with 409, and accepts only upgrades. MODULE_API.md's
registerTeamProvider section says why: a second provider fails that
module's whole load.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01E14m6SuuY6i1vASFeGDBeY