* feat: Agent Plugins v1.0.0 support
Adds root plugin.json and mcp.json, moves aws-core hooks under the
com.anthropic.claude-code namespace, fixes skill frontmatter at the
canonical sources, and adds a conformance validator wired into
mise run validate.
Frontmatter edits are made in skills/ and propagated to plugin copies
with tools/sync-plugin-skills.py, so lint:skill-parity stays green.
* fix: restore Codex hook loading via manifest pointer
Laith Al-Saadoon