claude-plugin/ holds the plugin manifest, the server configuration
(haiku-rag mcp --stdio, the configuration decides the database) and a
skill that says when to reach for the knowledge base and how to move
from a search result to a document, a section, an answer or a
computation. A repo-root marketplace manifest makes
`claude plugin marketplace add ggozad/haiku.rag` work. The skill
pre-approves every tool the server registers, and a test keeps the two
in step.
The manifest carries the package version, which bump_version.py now
rewrites: a versioned plugin updates only on a bump, so the installed
skill stays in step with the haiku-rag release the user has.
Refs #599
