New scripts/host-config.ts defines the typed HostConfig interface that
captures all per-host variation: paths, frontmatter rules, path/tool
rewrites, suppressed resolvers, runtime root symlinks, install strategy,
and behavioral config (co-author trailer, learnings mode, boundary
instruction). Includes validateHostConfig() and validateAllConfigs() with
regex-based security validation and cross-config uniqueness checks.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Garry Tan