Extends D-75's accepted CC-internals coupling from the transcript/team
schema to the config layout: a builtin-owned ClaudeConfig service is the
app-wide source of truth for skills, commands, settings, and permissions
(global + local, layered), watched and refreshable. Built-in slash
commands come from a stream-json probe cached per claude version id.
Kernel stays Claude-agnostic — Claude is a non-disableable extension but
still an extension. Implemented by T-151..T-154.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>